/* File IO for GNU Emacs. Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. This file is part of GNU Emacs. GNU Emacs is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GNU Emacs is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Emacs; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include #ifdef HAVE_FCNTL_H #include #endif #include #include #include /* S_ISLNK and S_IFLNK are defined in mingw-runtime, although symbolic link is not supported on Windows. */ #if defined(MEADOW) && defined(__MINGW32__) #undef S_ISLNK #undef S_IFLNK #endif #ifdef HAVE_UNISTD_H #include #endif #if !defined (S_ISLNK) && defined (S_IFLNK) # define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK) #endif #if !defined (S_ISFIFO) && defined (S_IFIFO) # define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO) #endif #if !defined (S_ISREG) && defined (S_IFREG) # define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) #endif #ifdef HAVE_PWD_H #include #endif #include #ifdef VMS #include "vmsdir.h" #include #include #include #endif #include #ifndef vax11c #ifndef USE_CRT_DLL extern int errno; #endif #endif #ifdef APOLLO #include #endif #include "lisp.h" #include "intervals.h" #include "buffer.h" #include "charset.h" #include "coding.h" #include "window.h" #include "blockinput.h" #ifdef WINDOWSNT #define NOMINMAX 1 #include #include #include #endif /* not WINDOWSNT */ #ifdef MSDOS #include "msdos.h" #include #if __DJGPP__ >= 2 #include #include #endif #endif #ifdef DOS_NT #define CORRECT_DIR_SEPS(s) \ do { if ('/' == DIRECTORY_SEP) dostounix_filename (s); \ else unixtodos_filename (s); \ } while (0) /* On Windows, drive letters must be alphabetic - on DOS, the Netware redirector allows the six letters between 'Z' and 'a' as well. */ #ifdef MSDOS #define IS_DRIVE(x) ((x) >= 'A' && (x) <= 'z') #endif #ifdef WINDOWSNT #define IS_DRIVE(x) isalpha (x) #endif /* Need to lower-case the drive letter, or else expanded filenames will sometimes compare inequal, because `expand-file-name' doesn't always down-case the drive letter. */ #define DRIVE_LETTER(x) (tolower (x)) #endif #ifdef VMS #include #include #include #include #endif #include "systime.h" #ifdef HPUX #include #ifndef HPUX8 #ifndef HPUX9 #include #endif #endif #endif #include "commands.h" extern int use_dialog_box; extern int use_file_dialog; #ifndef O_WRONLY #define O_WRONLY 1 #endif #ifndef O_RDONLY #define O_RDONLY 0 #endif #ifndef S_ISLNK # define lstat stat #endif #ifndef FILE_SYSTEM_CASE #define FILE_SYSTEM_CASE(filename) (filename) #endif /* Nonzero during writing of auto-save files */ int auto_saving; /* Set by auto_save_1 to mode of original file so Fwrite_region will create a new file with the same mode as the original */ int auto_save_mode_bits; /* The symbol bound to coding-system-for-read when insert-file-contents is called for recovering a file. This is not an actual coding system name, but just an indicator to tell insert-file-contents to use `emacs-mule' with a special flag for auto saving and recovering a file. */ Lisp_Object Qauto_save_coding; /* Coding system for file names, or nil if none. */ Lisp_Object Vfile_name_coding_system; /* Coding system for file names used only when Vfile_name_coding_system is nil. */ Lisp_Object Vdefault_file_name_coding_system; /* Alist of elements (REGEXP . HANDLER) for file names whose I/O is done with a special handler. */ Lisp_Object Vfile_name_handler_alist; /* Property name of a file name handler, which gives a list of operations it handles.. */ Lisp_Object Qoperations; /* Lisp functions for translating file formats */ Lisp_Object Qformat_decode, Qformat_annotate_function; /* Function to be called to decide a coding system of a reading file. */ Lisp_Object Vset_auto_coding_function; /* Functions to be called to process text properties in inserted file. */ Lisp_Object Vafter_insert_file_functions; /* Lisp function for setting buffer-file-coding-system and the multibyteness of the current buffer after inserting a file. */ Lisp_Object Qafter_insert_file_set_coding; /* Functions to be called to create text property annotations for file. */ Lisp_Object Vwrite_region_annotate_functions; Lisp_Object Qwrite_region_annotate_functions; /* During build_annotations, each time an annotation function is called, this holds the annotations made by the previous functions. */ Lisp_Object Vwrite_region_annotations_so_far; /* File name in which we write a list of all our auto save files. */ Lisp_Object Vauto_save_list_file_name; /* Function to call to read a file name. */ Lisp_Object Vread_file_name_function; /* Current predicate used by read_file_name_internal. */ Lisp_Object Vread_file_name_predicate; /* Nonzero means completion ignores case when reading file name. */ int read_file_name_completion_ignore_case; /* Nonzero means, when reading a filename in the minibuffer, start out by inserting the default directory into the minibuffer. */ int insert_default_directory; /* On VMS, nonzero means write new files with record format stmlf. Zero means use var format. */ int vms_stmlf_recfm; /* On NT, specifies the directory separator character, used (eg.) when expanding file names. This can be bound to / or \. */ Lisp_Object Vdirectory_sep_char; #ifdef HAVE_FSYNC /* Nonzero means skip the call to fsync in Fwrite-region. */ int write_region_inhibit_fsync; #endif extern Lisp_Object Vuser_login_name; #ifdef WINDOWSNT extern Lisp_Object Vw32_get_true_file_attributes; #endif extern int minibuf_level; extern int minibuffer_auto_raise; extern int history_delete_duplicates; /* These variables describe handlers that have "already" had a chance to handle the current operation. Vinhibit_file_name_handlers is a list of file name handlers. Vinhibit_file_name_operation is the operation being handled. If we try to handle that operation, we ignore those handlers. */ static Lisp_Object Vinhibit_file_name_handlers; static Lisp_Object Vinhibit_file_name_operation; Lisp_Object Qfile_error, Qfile_already_exists, Qfile_date_error; Lisp_Object Qexcl; Lisp_Object Qfile_name_history; Lisp_Object Qcar_less_than_car; static int a_write P_ ((int, Lisp_Object, int, int, Lisp_Object *, struct coding_system *)); static int e_write P_ ((int, Lisp_Object, int, int, struct coding_system *)); void report_file_error (string, data) const char *string; Lisp_Object data; { Lisp_Object errstring; int errorno = errno; synchronize_system_messages_locale (); errstring = code_convert_string_norecord (build_string (strerror (errorno)), Vlocale_coding_system, 0); while (1) switch (errorno) { case EEXIST: xsignal (Qfile_already_exists, Fcons (errstring, data)); break; default: /* System error messages are capitalized. Downcase the initial unless it is followed by a slash. */ if (SREF (errstring, 1) != '/') SSET (errstring, 0, DOWNCASE (SREF (errstring, 0))); xsignal (Qfile_error, Fcons (build_string (string), Fcons (errstring, data))); } } Lisp_Object close_file_unwind (fd) Lisp_Object fd; { emacs_close (XFASTINT (fd)); return Qnil; } /* Restore point, having saved it as a marker. */ static Lisp_Object restore_point_unwind (location) Lisp_Object location; { Fgoto_char (location); Fset_marker (location, Qnil, Qnil); return Qnil; } Lisp_Object Qexpand_file_name; Lisp_Object Qsubstitute_in_file_name; Lisp_Object Qdirectory_file_name; Lisp_Object Qfile_name_directory; Lisp_Object Qfile_name_nondirectory; Lisp_Object Qunhandled_file_name_directory; Lisp_Object Qfile_name_as_directory; Lisp_Object Qcopy_file; Lisp_Object Qmake_directory_internal; Lisp_Object Qmake_directory; Lisp_Object Qdelete_directory; Lisp_Object Qdelete_file; Lisp_Object Qrename_file; Lisp_Object Qadd_name_to_file; Lisp_Object Qmake_symbolic_link; Lisp_Object Qfile_exists_p; Lisp_Object Qfile_executable_p; Lisp_Object Qfile_readable_p; Lisp_Object Qfile_writable_p; Lisp_Object Qfile_symlink_p; Lisp_Object Qaccess_file; Lisp_Object Qfile_directory_p; Lisp_Object Qfile_regular_p; Lisp_Object Qfile_accessible_directory_p; Lisp_Object Qfile_modes; Lisp_Object Qset_file_modes; Lisp_Object Qset_file_times; Lisp_Object Qfile_newer_than_file_p; Lisp_Object Qinsert_file_contents; Lisp_Object Qwrite_region; Lisp_Object Qverify_visited_file_modtime; Lisp_Object Qset_visited_file_modtime; DEFUN ("find-file-name-handler", Ffind_file_name_handler, Sfind_file_name_handler, 2, 2, 0, doc: /* Return FILENAME's handler function for OPERATION, if it has one. Otherwise, return nil. A file name is handled if one of the regular expressions in `file-name-handler-alist' matches it. If OPERATION equals `inhibit-file-name-operation', then we ignore any handlers that are members of `inhibit-file-name-handlers', but we still do run any other handlers. This lets handlers use the standard functions without calling themselves recursively. */) (filename, operation) Lisp_Object filename, operation; { /* This function must not munge the match data. */ Lisp_Object chain, inhibited_handlers, result; int pos = -1; result = Qnil; CHECK_STRING (filename); if (EQ (operation, Vinhibit_file_name_operation)) inhibited_handlers = Vinhibit_file_name_handlers; else inhibited_handlers = Qnil; for (chain = Vfile_name_handler_alist; CONSP (chain); chain = XCDR (chain)) { Lisp_Object elt; elt = XCAR (chain); if (CONSP (elt)) { Lisp_Object string = XCAR (elt); int match_pos; Lisp_Object handler = XCDR (elt); Lisp_Object operations = Qnil; if (SYMBOLP (handler)) operations = Fget (handler, Qoperations); if (STRINGP (string) && (match_pos = fast_string_match (string, filename)) > pos && (NILP (operations) || ! NILP (Fmemq (operation, operations)))) { Lisp_Object tem; handler = XCDR (elt); tem = Fmemq (handler, inhibited_handlers); if (NILP (tem)) { result = handler; pos = match_pos; } } } QUIT; } return result; } DEFUN ("file-name-directory", Ffile_name_directory, Sfile_name_directory, 1, 1, 0, doc: /* Return the directory component in file name FILENAME. Return nil if FILENAME does not include a directory. Otherwise return a directory name. Given a Unix syntax file name, returns a string ending in slash; on VMS, perhaps instead a string ending in `:', `]' or `>'. */) (filename) Lisp_Object filename; { #ifndef DOS_NT register const unsigned char *beg; #else register unsigned char *beg; #endif register const unsigned char *p; Lisp_Object handler; CHECK_STRING (filename); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (filename, Qfile_name_directory); if (!NILP (handler)) return call2 (handler, Qfile_name_directory, filename); filename = FILE_SYSTEM_CASE (filename); beg = SDATA (filename); #ifdef DOS_NT beg = strcpy (alloca (strlen (beg) + 1), beg); #endif p = beg + SBYTES (filename); while (p != beg && !IS_DIRECTORY_SEP (p[-1]) #ifdef VMS && p[-1] != ':' && p[-1] != ']' && p[-1] != '>' #endif /* VMS */ #ifdef DOS_NT /* only recognise drive specifier at the beginning */ && !(p[-1] == ':' /* handle the "/:d:foo" and "/:foo" cases correctly */ && ((p == beg + 2 && !IS_DIRECTORY_SEP (*beg)) || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) #endif ) p--; if (p == beg) return Qnil; #ifdef DOS_NT /* Expansion of "c:" to drive and default directory. */ if (p[-1] == ':') { /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */ unsigned char *res = alloca (MAXPATHLEN + 1); unsigned char *r = res; if (p == beg + 4 && IS_DIRECTORY_SEP (*beg) && beg[1] == ':') { strncpy (res, beg, 2); beg += 2; r += 2; } if (getdefdir (toupper (*beg) - 'A' + 1, r)) { if (!IS_DIRECTORY_SEP (res[strlen (res) - 1])) strcat (res, "/"); beg = res; p = beg + strlen (beg); } } CORRECT_DIR_SEPS (beg); #endif /* DOS_NT */ return make_specified_string (beg, -1, p - beg, STRING_MULTIBYTE (filename)); } DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, Sfile_name_nondirectory, 1, 1, 0, doc: /* Return file name FILENAME sans its directory. For example, in a Unix-syntax file name, this is everything after the last slash, or the entire name if it contains no slash. */) (filename) Lisp_Object filename; { register const unsigned char *beg, *p, *end; Lisp_Object handler; CHECK_STRING (filename); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (filename, Qfile_name_nondirectory); if (!NILP (handler)) return call2 (handler, Qfile_name_nondirectory, filename); beg = SDATA (filename); end = p = beg + SBYTES (filename); while (p != beg && !IS_DIRECTORY_SEP (p[-1]) #ifdef VMS && p[-1] != ':' && p[-1] != ']' && p[-1] != '>' #endif /* VMS */ #ifdef DOS_NT /* only recognise drive specifier at beginning */ && !(p[-1] == ':' /* handle the "/:d:foo" case correctly */ && (p == beg + 2 || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) #endif ) p--; return make_specified_string (p, -1, end - p, STRING_MULTIBYTE (filename)); } DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory, Sunhandled_file_name_directory, 1, 1, 0, doc: /* Return a directly usable directory name somehow associated with FILENAME. A `directly usable' directory name is one that may be used without the intervention of any file handler. If FILENAME is a directly usable file itself, return \(file-name-directory FILENAME). The `call-process' and `start-process' functions use this function to get a current directory to run processes in. */) (filename) Lisp_Object filename; { Lisp_Object handler; /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (filename, Qunhandled_file_name_directory); if (!NILP (handler)) return call2 (handler, Qunhandled_file_name_directory, filename); return Ffile_name_directory (filename); } char * file_name_as_directory (out, in) char *out, *in; { int size = strlen (in) - 1; strcpy (out, in); if (size < 0) { out[0] = '.'; out[1] = '/'; out[2] = 0; return out; } #ifdef VMS /* Is it already a directory string? */ if (in[size] == ':' || in[size] == ']' || in[size] == '>') return out; /* Is it a VMS directory file name? If so, hack VMS syntax. */ else if (! index (in, '/') && ((size > 3 && ! strcmp (&in[size - 3], ".DIR")) || (size > 3 && ! strcmp (&in[size - 3], ".dir")) || (size > 5 && (! strncmp (&in[size - 5], ".DIR", 4) || ! strncmp (&in[size - 5], ".dir", 4)) && (in[size - 1] == '.' || in[size - 1] == ';') && in[size] == '1'))) { register char *p, *dot; char brack; /* x.dir -> [.x] dir:x.dir --> dir:[x] dir:[x]y.dir --> dir:[x.y] */ p = in + size; while (p != in && *p != ':' && *p != '>' && *p != ']') p--; if (p != in) { strncpy (out, in, p - in); out[p - in] = '\0'; if (*p == ':') { brack = ']'; strcat (out, ":["); } else { brack = *p; strcat (out, "."); } p++; } else { brack = ']'; strcpy (out, "[."); } dot = index (p, '.'); if (dot) { /* blindly remove any extension */ size = strlen (out) + (dot - p); strncat (out, p, dot - p); } else { strcat (out, p); size = strlen (out); } out[size++] = brack; out[size] = '\0'; } #else /* not VMS */ /* For Unix syntax, Append a slash if necessary */ if (!IS_DIRECTORY_SEP (out[size])) { /* Cannot use DIRECTORY_SEP, which could have any value */ out[size + 1] = '/'; out[size + 2] = '\0'; } #ifdef DOS_NT CORRECT_DIR_SEPS (out); #endif #endif /* not VMS */ return out; } DEFUN ("file-name-as-directory", Ffile_name_as_directory, Sfile_name_as_directory, 1, 1, 0, doc: /* Return a string representing the file name FILE interpreted as a directory. This operation exists because a directory is also a file, but its name as a directory is different from its name as a file. The result can be used as the value of `default-directory' or passed as second argument to `expand-file-name'. For a Unix-syntax file name, just appends a slash. On VMS, converts \"[X]FOO.DIR\" to \"[X.FOO]\", etc. */) (file) Lisp_Object file; { char *buf; Lisp_Object handler; CHECK_STRING (file); if (NILP (file)) return Qnil; /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (file, Qfile_name_as_directory); if (!NILP (handler)) return call2 (handler, Qfile_name_as_directory, file); buf = (char *) alloca (SBYTES (file) + 10); file_name_as_directory (buf, SDATA (file)); return make_specified_string (buf, -1, strlen (buf), STRING_MULTIBYTE (file)); } /* * Convert from directory name to filename. * On VMS: * xyzzy:[mukesh.emacs] => xyzzy:[mukesh]emacs.dir.1 * xyzzy:[mukesh] => xyzzy:[000000]mukesh.dir.1 * On UNIX, it's simple: just make sure there isn't a terminating / * Value is nonzero if the string output is different from the input. */ int directory_file_name (src, dst) char *src, *dst; { long slen; #ifdef VMS long rlen; char * ptr, * rptr; char bracket; struct FAB fab = cc$rms_fab; struct NAM nam = cc$rms_nam; char esa[NAM$C_MAXRSS]; #endif /* VMS */ slen = strlen (src); #ifdef VMS if (! index (src, '/') && (src[slen - 1] == ']' || src[slen - 1] == ':' || src[slen - 1] == '>')) { /* VMS style - convert [x.y.z] to [x.y]z, [x] to [000000]x */ fab.fab$l_fna = src; fab.fab$b_fns = slen; fab.fab$l_nam = &nam; fab.fab$l_fop = FAB$M_NAM; nam.nam$l_esa = esa; nam.nam$b_ess = sizeof esa; nam.nam$b_nop |= NAM$M_SYNCHK; /* We call SYS$PARSE to handle such things as [--] for us. */ if (SYS$PARSE (&fab, 0, 0) == RMS$_NORMAL) { slen = nam.nam$b_esl; if (esa[slen - 1] == ';' && esa[slen - 2] == '.') slen -= 2; esa[slen] = '\0'; src = esa; } if (src[slen - 1] != ']' && src[slen - 1] != '>') { /* what about when we have logical_name:???? */ if (src[slen - 1] == ':') { /* Xlate logical name and see what we get */ ptr = strcpy (dst, src); /* upper case for getenv */ while (*ptr) { if ('a' <= *ptr && *ptr <= 'z') *ptr -= 040; ptr++; } dst[slen - 1] = 0; /* remove colon */ if (!(src = egetenv (dst))) return 0; /* should we jump to the beginning of this procedure? Good points: allows us to use logical names that xlate to Unix names, Bad points: can be a problem if we just translated to a device name... For now, I'll punt and always expect VMS names, and hope for the best! */ slen = strlen (src); if (src[slen - 1] != ']' && src[slen - 1] != '>') { /* no recursion here! */ strcpy (dst, src); return 0; } } else { /* not a directory spec */ strcpy (dst, src); return 0; } } bracket = src[slen - 1]; /* If bracket is ']' or '>', bracket - 2 is the corresponding opening bracket. */ ptr = index (src, bracket - 2); if (ptr == 0) { /* no opening bracket */ strcpy (dst, src); return 0; } if (!(rptr = rindex (src, '.'))) rptr = ptr; slen = rptr - src; strncpy (dst, src, slen); dst[slen] = '\0'; if (*rptr == '.') { dst[slen++] = bracket; dst[slen] = '\0'; } else { /* If we have the top-level of a rooted directory (i.e. xx:[000000]), then translate the device and recurse. */ if (dst[slen - 1] == ':' && dst[slen - 2] != ':' /* skip decnet nodes */ && strcmp (src + slen, "[000000]") == 0) { dst[slen - 1] = '\0'; if ((ptr = egetenv (dst)) && (rlen = strlen (ptr) - 1) > 0 && (ptr[rlen] == ']' || ptr[rlen] == '>') && ptr[rlen - 1] == '.') { char * buf = (char *) alloca (strlen (ptr) + 1); strcpy (buf, ptr); buf[rlen - 1] = ']'; buf[rlen] = '\0'; return directory_file_name (buf, dst); } else dst[slen - 1] = ':'; } strcat (dst, "[000000]"); slen += 8; } rptr++; rlen = strlen (rptr) - 1; strncat (dst, rptr, rlen); dst[slen + rlen] = '\0'; strcat (dst, ".DIR.1"); return 1; } #endif /* VMS */ /* Process as Unix format: just remove any final slash. But leave "/" unchanged; do not change it to "". */ strcpy (dst, src); #ifdef APOLLO /* Handle // as root for apollo's. */ if ((slen > 2 && dst[slen - 1] == '/') || (slen > 1 && dst[0] != '/' && dst[slen - 1] == '/')) dst[slen - 1] = 0; #else if (slen > 1 && IS_DIRECTORY_SEP (dst[slen - 1]) #ifdef DOS_NT && !IS_ANY_SEP (dst[slen - 2]) #endif ) dst[slen - 1] = 0; #endif #ifdef DOS_NT CORRECT_DIR_SEPS (dst); #endif return 1; } DEFUN ("directory-file-name", Fdirectory_file_name, Sdirectory_file_name, 1, 1, 0, doc: /* Returns the file name of the directory named DIRECTORY. This is the name of the file that holds the data for the directory DIRECTORY. This operation exists because a directory is also a file, but its name as a directory is different from its name as a file. In Unix-syntax, this function just removes the final slash. On VMS, given a VMS-syntax directory name such as \"[X.Y]\", it returns a file name such as \"[X]Y.DIR.1\". */) (directory) Lisp_Object directory; { char *buf; Lisp_Object handler; CHECK_STRING (directory); if (NILP (directory)) return Qnil; /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (directory, Qdirectory_file_name); if (!NILP (handler)) return call2 (handler, Qdirectory_file_name, directory); #ifdef VMS /* 20 extra chars is insufficient for VMS, since we might perform a logical name translation. an equivalence string can be up to 255 chars long, so grab that much extra space... - sss */ buf = (char *) alloca (SBYTES (directory) + 20 + 255); #else buf = (char *) alloca (SBYTES (directory) + 20); #endif directory_file_name (SDATA (directory), buf); return make_specified_string (buf, -1, strlen (buf), STRING_MULTIBYTE (directory)); } static char make_temp_name_tbl[64] = { 'A','B','C','D','E','F','G','H', 'I','J','K','L','M','N','O','P', 'Q','R','S','T','U','V','W','X', 'Y','Z','a','b','c','d','e','f', 'g','h','i','j','k','l','m','n', 'o','p','q','r','s','t','u','v', 'w','x','y','z','0','1','2','3', '4','5','6','7','8','9','-','_' }; static unsigned make_temp_name_count, make_temp_name_count_initialized_p; /* Value is a temporary file name starting with PREFIX, a string. The Emacs process number forms part of the result, so there is no danger of generating a name being used by another process. In addition, this function makes an attempt to choose a name which has no existing file. To make this work, PREFIX should be an absolute file name. BASE64_P non-zero means add the pid as 3 characters in base64 encoding. In this case, 6 characters will be added to PREFIX to form the file name. Otherwise, if Emacs is running on a system with long file names, add the pid as a decimal number. This function signals an error if no unique file name could be generated. */ Lisp_Object make_temp_name (prefix, base64_p) Lisp_Object prefix; int base64_p; { Lisp_Object val; int len, clen; int pid; unsigned char *p, *data; char pidbuf[20]; int pidlen; CHECK_STRING (prefix); /* VAL is created by adding 6 characters to PREFIX. The first three are the PID of this process, in base 64, and the second three are incremented if the file already exists. This ensures 262144 unique file names per PID per PREFIX. */ pid = (int) getpid (); if (base64_p) { pidbuf[0] = make_temp_name_tbl[pid & 63], pid >>= 6; pidbuf[1] = make_temp_name_tbl[pid & 63], pid >>= 6; pidbuf[2] = make_temp_name_tbl[pid & 63], pid >>= 6; pidlen = 3; } else { #ifdef HAVE_LONG_FILE_NAMES sprintf (pidbuf, "%d", pid); pidlen = strlen (pidbuf); #else pidbuf[0] = make_temp_name_tbl[pid & 63], pid >>= 6; pidbuf[1] = make_temp_name_tbl[pid & 63], pid >>= 6; pidbuf[2] = make_temp_name_tbl[pid & 63], pid >>= 6; pidlen = 3; #endif } len = SBYTES (prefix); clen = SCHARS (prefix); val = make_uninit_multibyte_string (clen + 3 + pidlen, len + 3 + pidlen); if (!STRING_MULTIBYTE (prefix)) STRING_SET_UNIBYTE (val); data = SDATA (val); bcopy(SDATA (prefix), data, len); p = data + len; bcopy (pidbuf, p, pidlen); p += pidlen; /* Here we try to minimize useless stat'ing when this function is invoked many times successively with the same PREFIX. We achieve this by initializing count to a random value, and incrementing it afterwards. We don't want make-temp-name to be called while dumping, because then make_temp_name_count_initialized_p would get set and then make_temp_name_count would not be set when Emacs starts. */ if (!make_temp_name_count_initialized_p) { make_temp_name_count = (unsigned) time (NULL); make_temp_name_count_initialized_p = 1; } while (1) { struct stat ignored; unsigned num = make_temp_name_count; p[0] = make_temp_name_tbl[num & 63], num >>= 6; p[1] = make_temp_name_tbl[num & 63], num >>= 6; p[2] = make_temp_name_tbl[num & 63], num >>= 6; /* Poor man's congruential RN generator. Replace with ++make_temp_name_count for debugging. */ make_temp_name_count += 25229; make_temp_name_count %= 225307; if (stat (data, &ignored) < 0) { /* We want to return only if errno is ENOENT. */ if (errno == ENOENT) return val; else /* The error here is dubious, but there is little else we can do. The alternatives are to return nil, which is as bad as (and in many cases worse than) throwing the error, or to ignore the error, which will likely result in looping through 225307 stat's, which is not only dog-slow, but also useless since it will fallback to the errow below, anyway. */ report_file_error ("Cannot create temporary name for prefix", Fcons (prefix, Qnil)); /* not reached */ } } error ("Cannot create temporary name for prefix `%s'", SDATA (prefix)); return Qnil; } DEFUN ("make-temp-name", Fmake_temp_name, Smake_temp_name, 1, 1, 0, doc: /* Generate temporary file name (string) starting with PREFIX (a string). The Emacs process number forms part of the result, so there is no danger of generating a name being used by another process. In addition, this function makes an attempt to choose a name which has no existing file. To make this work, PREFIX should be an absolute file name. There is a race condition between calling `make-temp-name' and creating the file which opens all kinds of security holes. For that reason, you should probably use `make-temp-file' instead, except in three circumstances: * If you are creating the file in the user's home directory. * If you are creating a directory rather than an ordinary file. * If you are taking special precautions as `make-temp-file' does. */) (prefix) Lisp_Object prefix; { return make_temp_name (prefix, 0); } DEFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, doc: /* Convert filename NAME to absolute, and canonicalize it. Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative \(does not start with slash or tilde); if DEFAULT-DIRECTORY is nil or missing, the current buffer's value of `default-directory' is used. File name components that are `.' are removed, and so are file name components followed by `..', along with the `..' itself; note that these simplifications are done without checking the resulting file names in the file system. An initial `~/' expands to your home directory. An initial `~USER/' expands to USER's home directory. See also the function `substitute-in-file-name'. */) (name, default_directory) Lisp_Object name, default_directory; { unsigned char *nm; register unsigned char *newdir, *p, *o; int tlen; unsigned char *target; struct passwd *pw; #ifdef VMS unsigned char * colon = 0; unsigned char * close = 0; unsigned char * slash = 0; unsigned char * brack = 0; int lbrack = 0, rbrack = 0; int dots = 0; #endif /* VMS */ #ifdef DOS_NT int drive = 0; int collapse_newdir = 1; int is_escaped = 0; #endif /* DOS_NT */ int length; Lisp_Object handler, result; int multibyte; CHECK_STRING (name); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (name, Qexpand_file_name); if (!NILP (handler)) return call3 (handler, Qexpand_file_name, name, default_directory); /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */ if (NILP (default_directory)) default_directory = current_buffer->directory; if (! STRINGP (default_directory)) { #ifdef DOS_NT /* "/" is not considered a root directory on DOS_NT, so using "/" here causes an infinite recursion in, e.g., the following: (let (default-directory) (expand-file-name "a")) To avoid this, we set default_directory to the root of the current drive. */ extern char *emacs_root_dir (void); default_directory = build_string (emacs_root_dir ()); #else default_directory = build_string ("/"); #endif } if (!NILP (default_directory)) { handler = Ffind_file_name_handler (default_directory, Qexpand_file_name); if (!NILP (handler)) return call3 (handler, Qexpand_file_name, name, default_directory); } o = SDATA (default_directory); /* Make sure DEFAULT_DIRECTORY is properly expanded. It would be better to do this down below where we actually use default_directory. Unfortunately, calling Fexpand_file_name recursively could invoke GC, and the strings might be relocated. This would be annoying because we have pointers into strings lying around that would need adjusting, and people would add new pointers to the code and forget to adjust them, resulting in intermittent bugs. Putting this call here avoids all that crud. The EQ test avoids infinite recursion. */ if (! NILP (default_directory) && !EQ (default_directory, name) /* Save time in some common cases - as long as default_directory is not relative, it can be canonicalized with name below (if it is needed at all) without requiring it to be expanded now. */ #ifdef DOS_NT /* Detect MSDOS file names with drive specifiers. */ && ! (IS_DRIVE (o[0]) && IS_DEVICE_SEP (o[1]) && IS_DIRECTORY_SEP (o[2])) #ifdef WINDOWSNT /* Detect Windows file names in UNC format. */ && ! (IS_DIRECTORY_SEP (o[0]) && IS_DIRECTORY_SEP (o[1])) #endif #else /* not DOS_NT */ /* Detect Unix absolute file names (/... alone is not absolute on DOS or Windows). */ && ! (IS_DIRECTORY_SEP (o[0])) #endif /* not DOS_NT */ ) { struct gcpro gcpro1; GCPRO1 (name); default_directory = Fexpand_file_name (default_directory, Qnil); UNGCPRO; } name = FILE_SYSTEM_CASE (name); nm = SDATA (name); multibyte = STRING_MULTIBYTE (name); #ifdef DOS_NT /* We will force directory separators to be either all \ or /, so make a local copy to modify, even if there ends up being no change. */ nm = strcpy (alloca (strlen (nm) + 1), nm); /* Note if special escape prefix is present, but remove for now. */ if (nm[0] == '/' && nm[1] == ':') { is_escaped = 1; nm += 2; } /* Find and remove drive specifier if present; this makes nm absolute even if the rest of the name appears to be relative. Only look for drive specifier at the beginning. */ if (IS_DRIVE (nm[0]) && IS_DEVICE_SEP (nm[1])) { drive = nm[0]; nm += 2; } #ifdef WINDOWSNT /* If we see "c://somedir", we want to strip the first slash after the colon when stripping the drive letter. Otherwise, this expands to "//somedir". */ if (drive && IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) nm++; #endif /* WINDOWSNT */ #endif /* DOS_NT */ #ifdef WINDOWSNT /* Discard any previous drive specifier if nm is now in UNC format. */ if (IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) { drive = 0; } #endif /* If nm is absolute, look for `/./' or `/../' or `//''sequences; if none are found, we can probably return right away. We will avoid allocating a new string if name is already fully expanded. */ if ( IS_DIRECTORY_SEP (nm[0]) #ifdef MSDOS && drive && !is_escaped #endif #ifdef WINDOWSNT && (drive || IS_DIRECTORY_SEP (nm[1])) && !is_escaped #endif #ifdef VMS || index (nm, ':') #endif /* VMS */ ) { /* If it turns out that the filename we want to return is just a suffix of FILENAME, we don't need to go through and edit things; we just need to construct a new string using data starting at the middle of FILENAME. If we set lose to a non-zero value, that means we've discovered that we can't do that cool trick. */ int lose = 0; p = nm; while (*p) { /* Since we know the name is absolute, we can assume that each element starts with a "/". */ /* "." and ".." are hairy. */ if (IS_DIRECTORY_SEP (p[0]) && p[1] == '.' && (IS_DIRECTORY_SEP (p[2]) || p[2] == 0 || (p[2] == '.' && (IS_DIRECTORY_SEP (p[3]) || p[3] == 0)))) lose = 1; /* We want to replace multiple `/' in a row with a single slash. */ else if (p > nm && IS_DIRECTORY_SEP (p[0]) && IS_DIRECTORY_SEP (p[1])) lose = 1; #ifdef VMS if (p[0] == '\\') lose = 1; if (p[0] == '/') { /* if dev:[dir]/, move nm to / */ if (!slash && p > nm && (brack || colon)) { nm = (brack ? brack + 1 : colon + 1); lbrack = rbrack = 0; brack = 0; colon = 0; } slash = p; } if (p[0] == '-') #ifdef NO_HYPHENS_IN_FILENAMES if (lbrack == rbrack) { /* Avoid clobbering negative version numbers. */ if (dots < 2) p[0] = '_'; } else #endif /* NO_HYPHENS_IN_FILENAMES */ if (lbrack > rbrack && ((p[-1] == '.' || p[-1] == '[' || p[-1] == '<') && (p[1] == '.' || p[1] == ']' || p[1] == '>'))) lose = 1; #ifdef NO_HYPHENS_IN_FILENAMES else p[0] = '_'; #endif /* NO_HYPHENS_IN_FILENAMES */ /* count open brackets, reset close bracket pointer */ if (p[0] == '[' || p[0] == '<') lbrack++, brack = 0; /* count close brackets, set close bracket pointer */ if (p[0] == ']' || p[0] == '>') rbrack++, brack = p; /* detect ][ or >< */ if ((p[0] == ']' || p[0] == '>') && (p[1] == '[' || p[1] == '<')) lose = 1; if ((p[0] == ':' || p[0] == ']' || p[0] == '>') && p[1] == '~') nm = p + 1, lose = 1; if (p[0] == ':' && (colon || slash)) /* if dev1:[dir]dev2:, move nm to dev2: */ if (brack) { nm = brack + 1; brack = 0; } /* if /name/dev:, move nm to dev: */ else if (slash) nm = slash + 1; /* if node::dev:, move colon following dev */ else if (colon && colon[-1] == ':') colon = p; /* if dev1:dev2:, move nm to dev2: */ else if (colon && colon[-1] != ':') { nm = colon + 1; colon = 0; } if (p[0] == ':' && !colon) { if (p[1] == ':') p++; colon = p; } if (lbrack == rbrack) if (p[0] == ';') dots = 2; else if (p[0] == '.') dots++; #endif /* VMS */ p++; } if (!lose) { #ifdef VMS if (index (nm, '/')) { nm = sys_translate_unix (nm); return make_specified_string (nm, -1, strlen (nm), multibyte); } #endif /* VMS */ #ifdef DOS_NT /* Make sure directories are all separated with / or \ as desired, but avoid allocation of a new string when not required. */ CORRECT_DIR_SEPS (nm); #ifdef WINDOWSNT if (IS_DIRECTORY_SEP (nm[1])) { if (strcmp (nm, SDATA (name)) != 0) name = make_specified_string (nm, -1, strlen (nm), multibyte); } else #endif /* drive must be set, so this is okay */ if (strcmp (nm - 2, SDATA (name)) != 0) { char temp[] = " :"; name = make_specified_string (nm, -1, p - nm, multibyte); temp[0] = DRIVE_LETTER (drive); name = concat2 (build_string (temp), name); } return name; #else /* not DOS_NT */ if (nm == SDATA (name)) return name; return make_specified_string (nm, -1, strlen (nm), multibyte); #endif /* not DOS_NT */ } } /* At this point, nm might or might not be an absolute file name. We need to expand ~ or ~user if present, otherwise prefix nm with default_directory if nm is not absolute, and finally collapse /./ and /foo/../ sequences. We set newdir to be the appropriate prefix if one is needed: - the relevant user directory if nm starts with ~ or ~user - the specified drive's working dir (DOS/NT only) if nm does not start with / - the value of default_directory. Note that these prefixes are not guaranteed to be absolute (except for the working dir of a drive). Therefore, to ensure we always return an absolute name, if the final prefix is not absolute we append it to the current working directory. */ newdir = 0; if (nm[0] == '~') /* prefix ~ */ { if (IS_DIRECTORY_SEP (nm[1]) #ifdef VMS || nm[1] == ':' #endif /* VMS */ || nm[1] == 0) /* ~ by itself */ { if (!(newdir = (unsigned char *) egetenv ("HOME"))) newdir = (unsigned char *) ""; nm++; #ifdef DOS_NT collapse_newdir = 0; #endif #ifdef VMS nm++; /* Don't leave the slash in nm. */ #endif /* VMS */ } else /* ~user/filename */ { for (p = nm; *p && (!IS_DIRECTORY_SEP (*p) #ifdef VMS && *p != ':' #endif /* VMS */ ); p++); o = (unsigned char *) alloca (p - nm + 1); bcopy ((char *) nm, o, p - nm); o [p - nm] = 0; BLOCK_INPUT; pw = (struct passwd *) getpwnam (o + 1); UNBLOCK_INPUT; if (pw) { newdir = (unsigned char *) pw -> pw_dir; #ifdef VMS nm = p + 1; /* skip the terminator */ #else nm = p; #ifdef DOS_NT collapse_newdir = 0; #endif #endif /* VMS */ } /* If we don't find a user of that name, leave the name unchanged; don't move nm forward to p. */ } } #ifdef DOS_NT /* On DOS and Windows, nm is absolute if a drive name was specified; use the drive's current directory as the prefix if needed. */ if (!newdir && drive) { /* Get default directory if needed to make nm absolute. */ if (!IS_DIRECTORY_SEP (nm[0])) { newdir = alloca (MAXPATHLEN + 1); if (!getdefdir (toupper (drive) - 'A' + 1, newdir)) newdir = NULL; } if (!newdir) { /* Either nm starts with /, or drive isn't mounted. */ newdir = alloca (4); newdir[0] = DRIVE_LETTER (drive); newdir[1] = ':'; newdir[2] = '/'; newdir[3] = 0; } } #endif /* DOS_NT */ /* Finally, if no prefix has been specified and nm is not absolute, then it must be expanded relative to default_directory. */ if (1 #ifndef DOS_NT /* /... alone is not absolute on DOS and Windows. */ && !IS_DIRECTORY_SEP (nm[0]) #endif #ifdef WINDOWSNT && !(IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) #endif #ifdef VMS && !index (nm, ':') #endif && !newdir) { newdir = SDATA (default_directory); multibyte |= STRING_MULTIBYTE (default_directory); #ifdef DOS_NT /* Note if special escape prefix is present, but remove for now. */ if (newdir[0] == '/' && newdir[1] == ':') { is_escaped = 1; newdir += 2; } #endif } #ifdef DOS_NT if (newdir) { /* First ensure newdir is an absolute name. */ if ( /* Detect MSDOS file names with drive specifiers. */ ! (IS_DRIVE (newdir[0]) && IS_DEVICE_SEP (newdir[1]) && IS_DIRECTORY_SEP (newdir[2])) #ifdef WINDOWSNT /* Detect Windows file names in UNC format. */ && ! (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) #endif ) { /* Effectively, let newdir be (expand-file-name newdir cwd). Because of the admonition against calling expand-file-name when we have pointers into lisp strings, we accomplish this indirectly by prepending newdir to nm if necessary, and using cwd (or the wd of newdir's drive) as the new newdir. */ if (IS_DRIVE (newdir[0]) && IS_DEVICE_SEP (newdir[1])) { drive = newdir[0]; newdir += 2; } if (!IS_DIRECTORY_SEP (nm[0])) { char * tmp = alloca (strlen (newdir) + strlen (nm) + 2); file_name_as_directory (tmp, newdir); strcat (tmp, nm); nm = tmp; } newdir = alloca (MAXPATHLEN + 1); if (drive) { if (!getdefdir (toupper (drive) - 'A' + 1, newdir)) newdir = "/"; } else getwd (newdir); } /* Strip off drive name from prefix, if present. */ if (IS_DRIVE (newdir[0]) && IS_DEVICE_SEP (newdir[1])) { drive = newdir[0]; newdir += 2; } /* Keep only a prefix from newdir if nm starts with slash (//server/share for UNC, nothing otherwise). */ if (IS_DIRECTORY_SEP (nm[0]) && collapse_newdir) { #ifdef WINDOWSNT if (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) { newdir = strcpy (alloca (strlen (newdir) + 1), newdir); p = newdir + 2; while (*p && !IS_DIRECTORY_SEP (*p)) p++; p++; while (*p && !IS_DIRECTORY_SEP (*p)) p++; *p = 0; } else #endif newdir = ""; } } #endif /* DOS_NT */ if (newdir) { /* Get rid of any slash at the end of newdir, unless newdir is just / or // (an incomplete UNC name). */ length = strlen (newdir); if (length > 1 && IS_DIRECTORY_SEP (newdir[length - 1]) #ifdef WINDOWSNT && !(length == 2 && IS_DIRECTORY_SEP (newdir[0])) #endif ) { unsigned char *temp = (unsigned char *) alloca (length); bcopy (newdir, temp, length - 1); temp[length - 1] = 0; newdir = temp; } tlen = length + 1; } else tlen = 0; /* Now concatenate the directory and name to new space in the stack frame */ tlen += strlen (nm) + 1; #ifdef DOS_NT /* Reserve space for drive specifier and escape prefix, since either or both may need to be inserted. (The Microsoft x86 compiler produces incorrect code if the following two lines are combined.) */ target = (unsigned char *) alloca (tlen + 4); target += 4; #else /* not DOS_NT */ target = (unsigned char *) alloca (tlen); #endif /* not DOS_NT */ *target = 0; if (newdir) { #ifndef VMS if (nm[0] == 0 || IS_DIRECTORY_SEP (nm[0])) { #ifdef DOS_NT /* If newdir is effectively "C:/", then the drive letter will have been stripped and newdir will be "/". Concatenating with an absolute directory in nm produces "//", which will then be incorrectly treated as a network share. Ignore newdir in this case (keeping the drive letter). */ if (!(drive && nm[0] && IS_DIRECTORY_SEP (newdir[0]) && newdir[1] == '\0')) #endif strcpy (target, newdir); } else #endif file_name_as_directory (target, newdir); } strcat (target, nm); #ifdef VMS if (index (target, '/')) strcpy (target, sys_translate_unix (target)); #endif /* VMS */ /* ASSERT (IS_DIRECTORY_SEP (target[0])) if not VMS */ /* Now canonicalize by removing `//', `/.' and `/foo/..' if they appear. */ p = target; o = target; while (*p) { #ifdef VMS if (*p != ']' && *p != '>' && *p != '-') { if (*p == '\\') p++; *o++ = *p++; } else if ((p[0] == ']' || p[0] == '>') && p[0] == p[1] + 2) /* brackets are offset from each other by 2 */ { p += 2; if (*p != '.' && *p != '-' && o[-1] != '.') /* convert [foo][bar] to [bar] */ while (o[-1] != '[' && o[-1] != '<') o--; else if (*p == '-' && *o != '.') *--p = '.'; } else if (p[0] == '-' && o[-1] == '.' && (p[1] == '.' || p[1] == ']' || p[1] == '>')) /* flush .foo.- ; leave - if stopped by '[' or '<' */ { do o--; while (o[-1] != '.' && o[-1] != '[' && o[-1] != '<'); if (p[1] == '.') /* foo.-.bar ==> bar. */ p += 2; else if (o[-1] == '.') /* '.foo.-]' ==> ']' */ p++, o--; /* else [foo.-] ==> [-] */ } else { #ifdef NO_HYPHENS_IN_FILENAMES if (*p == '-' && o[-1] != '[' && o[-1] != '<' && o[-1] != '.' && p[1] != ']' && p[1] != '>' && p[1] != '.') *p = '_'; #endif /* NO_HYPHENS_IN_FILENAMES */ *o++ = *p++; } #else /* not VMS */ if (!IS_DIRECTORY_SEP (*p)) { *o++ = *p++; } else if (p[1] == '.' && (IS_DIRECTORY_SEP (p[2]) || p[2] == 0)) { /* If "/." is the entire filename, keep the "/". Otherwise, just delete the whole "/.". */ if (o == target && p[2] == '\0') *o++ = *p; p += 2; } else if (p[1] == '.' && p[2] == '.' /* `/../' is the "superroot" on certain file systems. Turned off on DOS_NT systems because they have no "superroot" and because this causes us to produce file names like "d:/../foo" which fail file-related functions of the underlying OS. (To reproduce, try a long series of "../../" in default_directory, longer than the number of levels from the root.) */ #ifndef DOS_NT && o != target #endif && (IS_DIRECTORY_SEP (p[3]) || p[3] == 0)) { while (o != target && (--o) && !IS_DIRECTORY_SEP (*o)) ; /* Keep initial / only if this is the whole name. */ if (o == target && IS_ANY_SEP (*o) && p[3] == 0) ++o; p += 3; } else if (p > target && IS_DIRECTORY_SEP (p[1])) /* Collapse multiple `/' in a row. */ p++; else { *o++ = *p++; } #endif /* not VMS */ } #ifdef DOS_NT /* At last, set drive name. */ #ifdef WINDOWSNT /* Except for network file name. */ if (!(IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1]))) #endif /* WINDOWSNT */ { if (!drive) abort (); target -= 2; target[0] = DRIVE_LETTER (drive); target[1] = ':'; } /* Reinsert the escape prefix if required. */ if (is_escaped) { target -= 2; target[0] = '/'; target[1] = ':'; } CORRECT_DIR_SEPS (target); #endif /* DOS_NT */ result = make_specified_string (target, -1, o - target, multibyte); /* Again look to see if the file name has special constructs in it and perhaps call the corresponding file handler. This is needed for filenames such as "/foo/../user@host:/bar/../baz". Expanding the ".." component gives us "/user@host:/bar/../baz" which needs to be expanded again. */ handler = Ffind_file_name_handler (result, Qexpand_file_name); if (!NILP (handler)) return call3 (handler, Qexpand_file_name, result, default_directory); return result; } #if 0 /* PLEASE DO NOT DELETE THIS COMMENTED-OUT VERSION! This is the old version of expand-file-name, before it was thoroughly rewritten for Emacs 10.31. We leave this version here commented-out, because the code is very complex and likely to have subtle bugs. If bugs _are_ found, it might be of interest to look at the old code and see what did it do in the relevant situation. Don't remove this code: it's true that it will be accessible via CVS, but a few years from deletion, people will forget it is there. */ /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. */ DEAFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, "Convert FILENAME to absolute, and canonicalize it.\n\ Second arg DEFAULT is directory to start with if FILENAME is relative\n\ \(does not start with slash); if DEFAULT is nil or missing,\n\ the current buffer's value of default-directory is used.\n\ Filenames containing `.' or `..' as components are simplified;\n\ initial `~/' expands to your home directory.\n\ See also the function `substitute-in-file-name'.") (name, defalt) Lisp_Object name, defalt; { unsigned char *nm; register unsigned char *newdir, *p, *o; int tlen; unsigned char *target; struct passwd *pw; int lose; #ifdef VMS unsigned char * colon = 0; unsigned char * close = 0; unsigned char * slash = 0; unsigned char * brack = 0; int lbrack = 0, rbrack = 0; int dots = 0; #endif /* VMS */ CHECK_STRING (name); #ifdef VMS /* Filenames on VMS are always upper case. */ name = Fupcase (name); #endif nm = SDATA (name); /* If nm is absolute, flush ...// and detect /./ and /../. If no /./ or /../ we can return right away. */ if ( nm[0] == '/' #ifdef VMS || index (nm, ':') #endif /* VMS */ ) { p = nm; lose = 0; while (*p) { if (p[0] == '/' && p[1] == '/' #ifdef APOLLO /* // at start of filename is meaningful on Apollo system. */ && nm != p #endif /* APOLLO */ ) nm = p + 1; if (p[0] == '/' && p[1] == '~') nm = p + 1, lose = 1; if (p[0] == '/' && p[1] == '.' && (p[2] == '/' || p[2] == 0 || (p[2] == '.' && (p[3] == '/' || p[3] == 0)))) lose = 1; #ifdef VMS if (p[0] == '\\') lose = 1; if (p[0] == '/') { /* if dev:[dir]/, move nm to / */ if (!slash && p > nm && (brack || colon)) { nm = (brack ? brack + 1 : colon + 1); lbrack = rbrack = 0; brack = 0; colon = 0; } slash = p; } if (p[0] == '-') #ifndef VMS4_4 /* VMS pre V4.4,convert '-'s in filenames. */ if (lbrack == rbrack) { if (dots < 2) /* this is to allow negative version numbers */ p[0] = '_'; } else #endif /* VMS4_4 */ if (lbrack > rbrack && ((p[-1] == '.' || p[-1] == '[' || p[-1] == '<') && (p[1] == '.' || p[1] == ']' || p[1] == '>'))) lose = 1; #ifndef VMS4_4 else p[0] = '_'; #endif /* VMS4_4 */ /* count open brackets, reset close bracket pointer */ if (p[0] == '[' || p[0] == '<') lbrack++, brack = 0; /* count close brackets, set close bracket pointer */ if (p[0] == ']' || p[0] == '>') rbrack++, brack = p; /* detect ][ or >< */ if ((p[0] == ']' || p[0] == '>') && (p[1] == '[' || p[1] == '<')) lose = 1; if ((p[0] == ':' || p[0] == ']' || p[0] == '>') && p[1] == '~') nm = p + 1, lose = 1; if (p[0] == ':' && (colon || slash)) /* if dev1:[dir]dev2:, move nm to dev2: */ if (brack) { nm = brack + 1; brack = 0; } /* If /name/dev:, move nm to dev: */ else if (slash) nm = slash + 1; /* If node::dev:, move colon following dev */ else if (colon && colon[-1] == ':') colon = p; /* If dev1:dev2:, move nm to dev2: */ else if (colon && colon[-1] != ':') { nm = colon + 1; colon = 0; } if (p[0] == ':' && !colon) { if (p[1] == ':') p++; colon = p; } if (lbrack == rbrack) if (p[0] == ';') dots = 2; else if (p[0] == '.') dots++; #endif /* VMS */ p++; } if (!lose) { #ifdef VMS if (index (nm, '/')) return build_string (sys_translate_unix (nm)); #endif /* VMS */ if (nm == SDATA (name)) return name; return build_string (nm); } } /* Now determine directory to start with and put it in NEWDIR */ newdir = 0; if (nm[0] == '~') /* prefix ~ */ if (nm[1] == '/' #ifdef VMS || nm[1] == ':' #endif /* VMS */ || nm[1] == 0)/* ~/filename */ { if (!(newdir = (unsigned char *) egetenv ("HOME"))) newdir = (unsigned char *) ""; nm++; #ifdef VMS nm++; /* Don't leave the slash in nm. */ #endif /* VMS */ } else /* ~user/filename */ { /* Get past ~ to user */ unsigned char *user = nm + 1; /* Find end of name. */ unsigned char *ptr = (unsigned char *) index (user, '/'); int len = ptr ? ptr - user : strlen (user); #ifdef VMS unsigned char *ptr1 = index (user, ':'); if (ptr1 != 0 && ptr1 - user < len) len = ptr1 - user; #endif /* VMS */ /* Copy the user name into temp storage. */ o = (unsigned char *) alloca (len + 1); bcopy ((char *) user, o, len); o[len] = 0; /* Look up the user name. */ BLOCK_INPUT; pw = (struct passwd *) getpwnam (o + 1); UNBLOCK_INPUT; if (!pw) error ("\"%s\" isn't a registered user", o + 1); newdir = (unsigned char *) pw->pw_dir; /* Discard the user name from NM. */ nm += len; } if (nm[0] != '/' #ifdef VMS && !index (nm, ':') #endif /* not VMS */ && !newdir) { if (NILP (defalt)) defalt = current_buffer->directory; CHECK_STRING (defalt); newdir = SDATA (defalt); } /* Now concatenate the directory and name to new space in the stack frame */ tlen = (newdir ? strlen (newdir) + 1 : 0) + strlen (nm) + 1; target = (unsigned char *) alloca (tlen); *target = 0; if (newdir) { #ifndef VMS if (nm[0] == 0 || nm[0] == '/') strcpy (target, newdir); else #endif file_name_as_directory (target, newdir); } strcat (target, nm); #ifdef VMS if (index (target, '/')) strcpy (target, sys_translate_unix (target)); #endif /* VMS */ /* Now canonicalize by removing /. and /foo/.. if they appear */ p = target; o = target; while (*p) { #ifdef VMS if (*p != ']' && *p != '>' && *p != '-') { if (*p == '\\') p++; *o++ = *p++; } else if ((p[0] == ']' || p[0] == '>') && p[0] == p[1] + 2) /* brackets are offset from each other by 2 */ { p += 2; if (*p != '.' && *p != '-' && o[-1] != '.') /* convert [foo][bar] to [bar] */ while (o[-1] != '[' && o[-1] != '<') o--; else if (*p == '-' && *o != '.') *--p = '.'; } else if (p[0] == '-' && o[-1] == '.' && (p[1] == '.' || p[1] == ']' || p[1] == '>')) /* flush .foo.- ; leave - if stopped by '[' or '<' */ { do o--; while (o[-1] != '.' && o[-1] != '[' && o[-1] != '<'); if (p[1] == '.') /* foo.-.bar ==> bar. */ p += 2; else if (o[-1] == '.') /* '.foo.-]' ==> ']' */ p++, o--; /* else [foo.-] ==> [-] */ } else { #ifndef VMS4_4 if (*p == '-' && o[-1] != '[' && o[-1] != '<' && o[-1] != '.' && p[1] != ']' && p[1] != '>' && p[1] != '.') *p = '_'; #endif /* VMS4_4 */ *o++ = *p++; } #else /* not VMS */ if (*p != '/') { *o++ = *p++; } else if (!strncmp (p, "//", 2) #ifdef APOLLO /* // at start of filename is meaningful in Apollo system. */ && o != target #endif /* APOLLO */ ) { o = target; p++; } else if (p[0] == '/' && p[1] == '.' && (p[2] == '/' || p[2] == 0)) p += 2; else if (!strncmp (p, "/..", 3) /* `/../' is the "superroot" on certain file systems. */ && o != target && (p[3] == '/' || p[3] == 0)) { while (o != target && *--o != '/') ; #ifdef APOLLO if (o == target + 1 && o[-1] == '/' && o[0] == '/') ++o; else #endif /* APOLLO */ if (o == target && *o == '/') ++o; p += 3; } else { *o++ = *p++; } #endif /* not VMS */ } return make_string (target, o - target); } #endif /* If /~ or // appears, discard everything through first slash. */ static int file_name_absolute_p (filename) const unsigned char *filename; { return (IS_DIRECTORY_SEP (*filename) || *filename == '~' #ifdef VMS /* ??? This criterion is probably wrong for '<'. */ || index (filename, ':') || index (filename, '<') || (*filename == '[' && (filename[1] != '-' || (filename[2] != '.' && filename[2] != ']')) && filename[1] != '.') #endif /* VMS */ #ifdef DOS_NT || (IS_DRIVE (*filename) && IS_DEVICE_SEP (filename[1]) && IS_DIRECTORY_SEP (filename[2])) #endif ); } static unsigned char * search_embedded_absfilename (nm, endp) unsigned char *nm, *endp; { unsigned char *p, *s; for (p = nm + 1; p < endp; p++) { if ((0 #ifdef VMS || p[-1] == ':' || p[-1] == ']' || p[-1] == '>' #endif /* VMS */ || IS_DIRECTORY_SEP (p[-1])) && file_name_absolute_p (p) #if defined (APOLLO) || defined (WINDOWSNT) || defined(CYGWIN) /* // at start of file name is meaningful in Apollo, WindowsNT and Cygwin systems. */ && !(IS_DIRECTORY_SEP (p[0]) && p - 1 == nm) #endif /* not (APOLLO || WINDOWSNT || CYGWIN) */ ) { for (s = p; *s && (!IS_DIRECTORY_SEP (*s) #ifdef VMS && *s != ':' #endif /* VMS */ ); s++); if (p[0] == '~' && s > p + 1) /* we've got "/~something/" */ { unsigned char *o = alloca (s - p + 1); struct passwd *pw; bcopy (p, o, s - p); o [s - p] = 0; /* If we have ~user and `user' exists, discard everything up to ~. But if `user' does not exist, leave ~user alone, it might be a literal file name. */ BLOCK_INPUT; pw = getpwnam (o + 1); UNBLOCK_INPUT; if (pw) return p; } else return p; } } return NULL; } DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, Ssubstitute_in_file_name, 1, 1, 0, doc: /* Substitute environment variables referred to in FILENAME. `$FOO' where FOO is an environment variable name means to substitute the value of that variable. The variable name should be terminated with a character not a letter, digit or underscore; otherwise, enclose the entire variable name in braces. If `/~' appears, all of FILENAME through that `/' is discarded. On VMS, `$' substitution is not done; this function does little and only duplicates what `expand-file-name' does. */) (filename) Lisp_Object filename; { unsigned char *nm; register unsigned char *s, *p, *o, *x, *endp; unsigned char *target = NULL; int total = 0; int substituted = 0; unsigned char *xnm; Lisp_Object handler; CHECK_STRING (filename); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (filename, Qsubstitute_in_file_name); if (!NILP (handler)) return call2 (handler, Qsubstitute_in_file_name, filename); nm = SDATA (filename); #ifdef DOS_NT nm = strcpy (alloca (strlen (nm) + 1), nm); CORRECT_DIR_SEPS (nm); substituted = (strcmp (nm, SDATA (filename)) != 0); #endif endp = nm + SBYTES (filename); /* If /~ or // appears, discard everything through first slash. */ p = search_embedded_absfilename (nm, endp); if (p) /* Start over with the new string, so we check the file-name-handler again. Important with filenames like "/home/foo//:/hello///there" which whould substitute to "/:/hello///there" rather than "/there". */ return Fsubstitute_in_file_name (make_specified_string (p, -1, endp - p, STRING_MULTIBYTE (filename))); #ifdef VMS return filename; #else /* See if any variables are substituted into the string and find the total length of their values in `total' */ for (p = nm; p != endp;) if (*p != '$') p++; else { p++; if (p == endp) goto badsubst; else if (*p == '$') { /* "$$" means a single "$" */ p++; total -= 1; substituted = 1; continue; } else if (*p == '{') { o = ++p; while (p != endp && *p != '}') p++; if (*p != '}') goto missingclose; s = p; } else { o = p; while (p != endp && (isalnum (*p) || *p == '_')) p++; s = p; } /* Copy out the variable name */ target = (unsigned char *) alloca (s - o + 1); strncpy (target, o, s - o); target[s - o] = 0; #ifdef DOS_NT strupr (target); /* $home == $HOME etc. */ #endif /* DOS_NT */ /* Get variable value */ o = (unsigned char *) egetenv (target); if (o) { /* Eight-bit chars occupy upto 2 bytes in multibyte. */ total += strlen (o) * (STRING_MULTIBYTE (filename) ? 2 : 1); substituted = 1; } else if (*p == '}') goto badvar; } if (!substituted) return filename; /* If substitution required, recopy the string and do it */ /* Make space in stack frame for the new copy */ xnm = (unsigned char *) alloca (SBYTES (filename) + total + 1); x = xnm; /* Copy the rest of the name through, replacing $ constructs with values */ for (p = nm; *p;) if (*p != '$') *x++ = *p++; else { p++; if (p == endp) goto badsubst; else if (*p == '$') { *x++ = *p++; continue; } else if (*p == '{') { o = ++p; while (p != endp && *p != '}') p++; if (*p != '}') goto missingclose; s = p++; } else { o = p; while (p != endp && (isalnum (*p) || *p == '_')) p++; s = p; } /* Copy out the variable name */ target = (unsigned char *) alloca (s - o + 1); strncpy (target, o, s - o); target[s - o] = 0; #ifdef DOS_NT strupr (target); /* $home == $HOME etc. */ #endif /* DOS_NT */ /* Get variable value */ o = (unsigned char *) egetenv (target); if (!o) { *x++ = '$'; strcpy (x, target); x+= strlen (target); } else if (STRING_MULTIBYTE (filename)) { /* If the original string is multibyte, convert what we substitute into multibyte. */ while (*o) { int c = unibyte_char_to_multibyte (*o++); x += CHAR_STRING (c, x); } } else { strcpy (x, o); x += strlen (o); } } *x = 0; /* If /~ or // appears, discard everything through first slash. */ while ((p = search_embedded_absfilename (xnm, x))) /* This time we do not start over because we've already expanded envvars and replaced $$ with $. Maybe we should start over as well, but we'd need to quote some $ to $$ first. */ xnm = p; return make_specified_string (xnm, -1, x - xnm, STRING_MULTIBYTE (filename)); badsubst: error ("Bad format environment-variable substitution"); missingclose: error ("Missing \"}\" in environment-variable substitution"); badvar: error ("Substituting nonexistent environment variable \"%s\"", target); /* NOTREACHED */ #endif /* not VMS */ return Qnil; } /* A slightly faster and more convenient way to get (directory-file-name (expand-file-name FOO)). */ Lisp_Object expand_and_dir_to_file (filename, defdir) Lisp_Object filename, defdir; { register Lisp_Object absname; absname = Fexpand_file_name (filename, defdir); #ifdef VMS { register int c = SREF (absname, SBYTES (absname) - 1); if (c == ':' || c == ']' || c == '>') absname = Fdirectory_file_name (absname); } #else /* Remove final slash, if any (unless this is the root dir). stat behaves differently depending! */ if (SCHARS (absname) > 1 && IS_DIRECTORY_SEP (SREF (absname, SBYTES (absname) - 1)) && !IS_DEVICE_SEP (SREF (absname, SBYTES (absname)-2))) /* We cannot take shortcuts; they might be wrong for magic file names. */ absname = Fdirectory_file_name (absname); #endif return absname; } /* Signal an error if the file ABSNAME already exists. If INTERACTIVE is nonzero, ask the user whether to proceed, and bypass the error if the user says to go ahead. QUERYSTRING is a name for the action that is being considered to alter the file. *STATPTR is used to store the stat information if the file exists. If the file does not exist, STATPTR->st_mode is set to 0. If STATPTR is null, we don't store into it. If QUICK is nonzero, we ask for y or n, not yes or no. */ void barf_or_query_if_file_exists (absname, querystring, interactive, statptr, quick) Lisp_Object absname; unsigned char *querystring; int interactive; struct stat *statptr; int quick; { register Lisp_Object tem, encoded_filename; struct stat statbuf; struct gcpro gcpro1; encoded_filename = ENCODE_FILE (absname); /* stat is a good way to tell whether the file exists, regardless of what access permissions it has. */ if (lstat (SDATA (encoded_filename), &statbuf) >= 0) { if (! interactive) xsignal2 (Qfile_already_exists, build_string ("File already exists"), absname); GCPRO1 (absname); tem = format2 ("File %s already exists; %s anyway? ", absname, build_string (querystring)); if (quick) tem = Fy_or_n_p (tem); else tem = do_yes_or_no_p (tem); UNGCPRO; if (NILP (tem)) xsignal2 (Qfile_already_exists, build_string ("File already exists"), absname); if (statptr) *statptr = statbuf; } else { if (statptr) statptr->st_mode = 0; } return; } DEFUN ("copy-file", Fcopy_file, Scopy_file, 2, 5, "fCopy file: \nGCopy %s to file: \np\nP", doc: /* Copy FILE to NEWNAME. Both args must be strings. If NEWNAME names a directory, copy FILE there. This function always sets the file modes of the output file to match the input file. The optional third argument OK-IF-ALREADY-EXISTS specifies what to do if file NEWNAME already exists. If OK-IF-ALREADY-EXISTS is nil, we signal a `file-already-exists' error without overwriting. If OK-IF-ALREADY-EXISTS is a number, we request confirmation from the user about overwriting; this is what happens in interactive use with M-x. Any other value for OK-IF-ALREADY-EXISTS means to overwrite the existing file. Fourth arg KEEP-TIME non-nil means give the output file the same last-modified time as the old one. (This works on only some systems.) A prefix arg makes KEEP-TIME non-nil. If PRESERVE-UID-GID is non-nil, we try to transfer the uid and gid of FILE to NEWNAME. */) (file, newname, ok_if_already_exists, keep_time, preserve_uid_gid) Lisp_Object file, newname, ok_if_already_exists, keep_time; Lisp_Object preserve_uid_gid; { int ifd, ofd, n; char buf[16 * 1024]; struct stat st, out_st; Lisp_Object handler; struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; int count = SPECPDL_INDEX (); int input_file_statable_p; Lisp_Object encoded_file, encoded_newname; encoded_file = encoded_newname = Qnil; GCPRO4 (file, newname, encoded_file, encoded_newname); CHECK_STRING (file); CHECK_STRING (newname); if (!NILP (Ffile_directory_p (newname))) newname = Fexpand_file_name (Ffile_name_nondirectory (file), newname); else newname = Fexpand_file_name (newname, Qnil); file = Fexpand_file_name (file, Qnil); /* If the input file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (file, Qcopy_file); /* Likewise for output file name. */ if (NILP (handler)) handler = Ffind_file_name_handler (newname, Qcopy_file); if (!NILP (handler)) RETURN_UNGCPRO (call5 (handler, Qcopy_file, file, newname, ok_if_already_exists, keep_time)); encoded_file = ENCODE_FILE (file); encoded_newname = ENCODE_FILE (newname); if (NILP (ok_if_already_exists) || INTEGERP (ok_if_already_exists)) barf_or_query_if_file_exists (newname, "copy to it", INTEGERP (ok_if_already_exists), &out_st, 0); else if (stat (SDATA (encoded_newname), &out_st) < 0) out_st.st_mode = 0; #ifdef WINDOWSNT if (!CopyFile (SDATA (encoded_file), SDATA (encoded_newname), FALSE)) report_file_error ("Copying file", Fcons (file, Fcons (newname, Qnil))); /* CopyFile retains the timestamp by default. */ else if (NILP (keep_time)) { EMACS_TIME now; DWORD attributes; char * filename; EMACS_GET_TIME (now); filename = SDATA (encoded_newname); /* Ensure file is writable while its modified time is set. */ attributes = GetFileAttributes (filename); SetFileAttributes (filename, attributes & ~FILE_ATTRIBUTE_READONLY); if (set_file_times (filename, now, now)) { /* Restore original attributes. */ SetFileAttributes (filename, attributes); xsignal2 (Qfile_date_error, build_string ("Cannot set file date"), newname); } /* Restore original attributes. */ SetFileAttributes (filename, attributes); } #else /* not WINDOWSNT */ immediate_quit = 1; ifd = emacs_open (SDATA (encoded_file), O_RDONLY, 0); immediate_quit = 0; if (ifd < 0) report_file_error ("Opening input file", Fcons (file, Qnil)); record_unwind_protect (close_file_unwind, make_number (ifd)); /* We can only copy regular files and symbolic links. Other files are not copyable by us. */ input_file_statable_p = (fstat (ifd, &st) >= 0); #if !defined (MSDOS) || __DJGPP__ > 1 if (out_st.st_mode != 0 && st.st_dev == out_st.st_dev && st.st_ino == out_st.st_ino) { errno = 0; report_file_error ("Input and output files are the same", Fcons (file, Fcons (newname, Qnil))); } #endif #if defined (S_ISREG) && defined (S_ISLNK) if (input_file_statable_p) { if (!(S_ISREG (st.st_mode)) && !(S_ISLNK (st.st_mode))) { #if defined (EISDIR) /* Get a better looking error message. */ errno = EISDIR; #endif /* EISDIR */ report_file_error ("Non-regular file", Fcons (file, Qnil)); } } #endif /* S_ISREG && S_ISLNK */ #ifdef VMS /* Create the copy file with the same record format as the input file */ ofd = sys_creat (SDATA (encoded_newname), 0666, ifd); #else #ifdef MSDOS /* System's default file type was set to binary by _fmode in emacs.c. */ ofd = emacs_open (SDATA (encoded_newname), O_WRONLY | O_TRUNC | O_CREAT | (NILP (ok_if_already_exists) ? O_EXCL : 0), S_IREAD | S_IWRITE); #else /* not MSDOS */ ofd = emacs_open (SDATA (encoded_newname), O_WRONLY | O_TRUNC | O_CREAT | (NILP (ok_if_already_exists) ? O_EXCL : 0), 0666); #endif /* not MSDOS */ #endif /* VMS */ if (ofd < 0) report_file_error ("Opening output file", Fcons (newname, Qnil)); record_unwind_protect (close_file_unwind, make_number (ofd)); immediate_quit = 1; QUIT; while ((n = emacs_read (ifd, buf, sizeof buf)) > 0) if (emacs_write (ofd, buf, n) != n) report_file_error ("I/O error", Fcons (newname, Qnil)); immediate_quit = 0; #ifndef MSDOS /* Preserve the original file modes, and if requested, also its owner and group. */ if (input_file_statable_p) { if (! NILP (preserve_uid_gid)) fchown (ofd, st.st_uid, st.st_gid); fchmod (ofd, st.st_mode & 07777); } #endif /* not MSDOS */ /* Closing the output clobbers the file times on some systems. */ if (emacs_close (ofd) < 0) report_file_error ("I/O error", Fcons (newname, Qnil)); if (input_file_statable_p) { if (!NILP (keep_time)) { EMACS_TIME atime, mtime; EMACS_SET_SECS_USECS (atime, st.st_atime, 0); EMACS_SET_SECS_USECS (mtime, st.st_mtime, 0); if (set_file_times (SDATA (encoded_newname), atime, mtime)) xsignal2 (Qfile_date_error, build_string ("Cannot set file date"), newname); } } emacs_close (ifd); #if defined (__DJGPP__) && __DJGPP__ > 1 if (input_file_statable_p) { /* In DJGPP v2.0 and later, fstat usually returns true file mode bits, and if it can't, it tells so. Otherwise, under MSDOS we usually get only the READ bit, which will make the copied file read-only, so it's better not to chmod at all. */ if ((_djstat_flags & _STFAIL_WRITEBIT) == 0) chmod (SDATA (encoded_newname), st.st_mode & 07777); } #endif /* DJGPP version 2 or newer */ #endif /* not WINDOWSNT */ /* Discard the unwind protects. */ specpdl_ptr = specpdl + count; UNGCPRO; return Qnil; } DEFUN ("make-directory-internal", Fmake_directory_internal, Smake_directory_internal, 1, 1, 0, doc: /* Create a new directory named DIRECTORY. */) (directory) Lisp_Object directory; { const unsigned char *dir; Lisp_Object handler; Lisp_Object encoded_dir; CHECK_STRING (directory); directory = Fexpand_file_name (directory, Qnil); handler = Ffind_file_name_handler (directory, Qmake_directory_internal); if (!NILP (handler)) return call2 (handler, Qmake_directory_internal, directory); encoded_dir = ENCODE_FILE (directory); dir = SDATA (encoded_dir); #ifdef WINDOWSNT if (mkdir (dir) != 0) #else if (mkdir (dir, 0777) != 0) #endif report_file_error ("Creating directory", list1 (directory)); return Qnil; } DEFUN ("delete-directory", Fdelete_directory, Sdelete_directory, 1, 1, "FDelete directory: ", doc: /* Delete the directory named DIRECTORY. Does not follow symlinks. */) (directory) Lisp_Object directory; { const unsigned char *dir; Lisp_Object handler; Lisp_Object encoded_dir; CHECK_STRING (directory); directory = Fdirectory_file_name (Fexpand_file_name (directory, Qnil)); handler = Ffind_file_name_handler (directory, Qdelete_directory); if (!NILP (handler)) return call2 (handler, Qdelete_directory, directory); encoded_dir = ENCODE_FILE (directory); dir = SDATA (encoded_dir); if (rmdir (dir) != 0) report_file_error ("Removing directory", list1 (directory)); return Qnil; } DEFUN ("delete-file", Fdelete_file, Sdelete_file, 1, 1, "fDelete file: ", doc: /* Delete file named FILENAME. If it is a symlink, remove the symlink. If file has multiple names, it continues to exist with the other names. */) (filename) Lisp_Object filename; { Lisp_Object handler; Lisp_Object encoded_file; struct gcpro gcpro1; GCPRO1 (filename); if (!NILP (Ffile_directory_p (filename)) && NILP (Ffile_symlink_p (filename))) xsignal2 (Qfile_error, build_string ("Removing old name: is a directory"), filename); UNGCPRO; filename = Fexpand_file_name (filename, Qnil); handler = Ffind_file_name_handler (filename, Qdelete_file); if (!NILP (handler)) return call2 (handler, Qdelete_file, filename); encoded_file = ENCODE_FILE (filename); if (0 > unlink (SDATA (encoded_file))) report_file_error ("Removing old name", list1 (filename)); return Qnil; } static Lisp_Object internal_delete_file_1 (ignore) Lisp_Object ignore; { return Qt; } /* Delete file FILENAME, returning 1 if successful and 0 if failed. */ int internal_delete_file (filename) Lisp_Object filename; { Lisp_Object tem; tem = internal_condition_case_1 (Fdelete_file, filename, Qt, internal_delete_file_1); return NILP (tem); } DEFUN ("rename-file", Frename_file, Srename_file, 2, 3, "fRename file: \nGRename %s to file: \np", doc: /* Rename FILE as NEWNAME. Both args must be strings. If file has names other than FILE, it continues to have those names. Signals a `file-already-exists' error if a file NEWNAME already exists unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. A number as third arg means request confirmation if NEWNAME already exists. This is what happens in interactive use with M-x. */) (file, newname, ok_if_already_exists) Lisp_Object file, newname, ok_if_already_exists; { Lisp_Object handler; struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; Lisp_Object encoded_file, encoded_newname, symlink_target; symlink_target = encoded_file = encoded_newname = Qnil; GCPRO5 (file, newname, encoded_file, encoded_newname, symlink_target); CHECK_STRING (file); CHECK_STRING (newname); file = Fexpand_file_name (file, Qnil); if ((!NILP (Ffile_directory_p (newname))) #ifdef DOS_NT /* If the file names are identical but for the case, don't attempt to move directory to itself. */ && (NILP (Fstring_equal (Fdowncase (file), Fdowncase (newname)))) #endif ) newname = Fexpand_file_name (Ffile_name_nondirectory (file), newname); else newname = Fexpand_file_name (newname, Qnil); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (file, Qrename_file); if (NILP (handler)) handler = Ffind_file_name_handler (newname, Qrename_file); if (!NILP (handler)) RETURN_UNGCPRO (call4 (handler, Qrename_file, file, newname, ok_if_already_exists)); encoded_file = ENCODE_FILE (file); encoded_newname = ENCODE_FILE (newname); #ifdef DOS_NT /* If the file names are identical but for the case, don't ask for confirmation: they simply want to change the letter-case of the file name. */ if (NILP (Fstring_equal (Fdowncase (file), Fdowncase (newname)))) #endif if (NILP (ok_if_already_exists) || INTEGERP (ok_if_already_exists)) barf_or_query_if_file_exists (newname, "rename to it", INTEGERP (ok_if_already_exists), 0, 0); #ifndef BSD4_1 if (0 > rename (SDATA (encoded_file), SDATA (encoded_newname))) #else if (0 > link (SDATA (encoded_file), SDATA (encoded_newname)) || 0 > unlink (SDATA (encoded_file))) #endif { if (errno == EXDEV) { #ifdef S_IFLNK symlink_target = Ffile_symlink_p (file); if (! NILP (symlink_target)) Fmake_symbolic_link (symlink_target, newname, NILP (ok_if_already_exists) ? Qnil : Qt); else #endif Fcopy_file (file, newname, /* We have already prompted if it was an integer, so don't have copy-file prompt again. */ NILP (ok_if_already_exists) ? Qnil : Qt, Qt, Qt); Fdelete_file (file); } else report_file_error ("Renaming", list2 (file, newname)); } UNGCPRO; return Qnil; } DEFUN ("add-name-to-file", Fadd_name_to_file, Sadd_name_to_file, 2, 3, "fAdd name to file: \nGName to add to %s: \np", doc: /* Give FILE additional name NEWNAME. Both args must be strings. Signals a `file-already-exists' error if a file NEWNAME already exists unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. A number as third arg means request confirmation if NEWNAME already exists. This is what happens in interactive use with M-x. */) (file, newname, ok_if_already_exists) Lisp_Object file, newname, ok_if_already_exists; { Lisp_Object handler; Lisp_Object encoded_file, encoded_newname; struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; GCPRO4 (file, newname, encoded_file, encoded_newname); encoded_file = encoded_newname = Qnil; CHECK_STRING (file); CHECK_STRING (newname); file = Fexpand_file_name (file, Qnil); if (!NILP (Ffile_directory_p (newname))) newname = Fexpand_file_name (Ffile_name_nondirectory (file), newname); else newname = Fexpand_file_name (newname, Qnil); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (file, Qadd_name_to_file); if (!NILP (handler)) RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, file, newname, ok_if_already_exists)); /* If the new name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (newname, Qadd_name_to_file); if (!NILP (handler)) RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, file, newname, ok_if_already_exists)); encoded_file = ENCODE_FILE (file); encoded_newname = ENCODE_FILE (newname); if (NILP (ok_if_already_exists) || INTEGERP (ok_if_already_exists)) barf_or_query_if_file_exists (newname, "make it a new name", INTEGERP (ok_if_already_exists), 0, 0); unlink (SDATA (newname)); if (0 > link (SDATA (encoded_file), SDATA (encoded_newname))) report_file_error ("Adding new name", list2 (file, newname)); UNGCPRO; return Qnil; } #ifdef S_IFLNK DEFUN ("make-symbolic-link", Fmake_symbolic_link, Smake_symbolic_link, 2, 3, "FMake symbolic link to file: \nGMake symbolic link to file %s: \np", doc: /* Make a symbolic link to FILENAME, named LINKNAME. Both args must be strings. Signals a `file-already-exists' error if a file LINKNAME already exists unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. A number as third arg means request confirmation if LINKNAME already exists. This happens for interactive use with M-x. */) (filename, linkname, ok_if_already_exists) Lisp_Object filename, linkname, ok_if_already_exists; { Lisp_Object handler; Lisp_Object encoded_filename, encoded_linkname; struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; GCPRO4 (filename, linkname, encoded_filename, encoded_linkname); encoded_filename = encoded_linkname = Qnil; CHECK_STRING (filename); CHECK_STRING (linkname); /* If the link target has a ~, we must expand it to get a truly valid file name. Otherwise, do not expand; we want to permit links to relative file names. */ if (SREF (filename, 0) == '~') filename = Fexpand_file_name (filename, Qnil); if (!NILP (Ffile_directory_p (linkname))) linkname = Fexpand_file_name (Ffile_name_nondirectory (filename), linkname); else linkname = Fexpand_file_name (linkname, Qnil); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (filename, Qmake_symbolic_link); if (!NILP (handler)) RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, linkname, ok_if_already_exists)); /* If the new link name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (linkname, Qmake_symbolic_link); if (!NILP (handler)) RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, linkname, ok_if_already_exists)); encoded_filename = ENCODE_FILE (filename); encoded_linkname = ENCODE_FILE (linkname); if (NILP (ok_if_already_exists) || INTEGERP (ok_if_already_exists)) barf_or_query_if_file_exists (linkname, "make it a link", INTEGERP (ok_if_already_exists), 0, 0); if (0 > symlink (SDATA (encoded_filename), SDATA (encoded_linkname))) { /* If we didn't complain already, silently delete existing file. */ if (errno == EEXIST) { unlink (SDATA (encoded_linkname)); if (0 <= symlink (SDATA (encoded_filename), SDATA (encoded_linkname))) { UNGCPRO; return Qnil; } } report_file_error ("Making symbolic link", list2 (filename, linkname)); } UNGCPRO; return Qnil; } #endif /* S_IFLNK */ #ifdef VMS DEFUN ("define-logical-name", Fdefine_logical_name, Sdefine_logical_name, 2, 2, "sDefine logical name: \nsDefine logical name %s as: ", doc: /* Define the job-wide logical name NAME to have the value STRING. If STRING is nil or a null string, the logical name NAME is deleted. */) (name, string) Lisp_Object name; Lisp_Object string; { CHECK_STRING (name); if (NILP (string)) delete_logical_name (SDATA (name)); else { CHECK_STRING (string); if (SCHARS (string) == 0) delete_logical_name (SDATA (name)); else define_logical_name (SDATA (name), SDATA (string)); } return string; } #endif /* VMS */ #ifdef HPUX_NET DEFUN ("sysnetunam", Fsysnetunam, Ssysnetunam, 2, 2, 0, doc: /* Open a network connection to PATH using LOGIN as the login string. */) (path, login) Lisp_Object path, login; { int netresult; CHECK_STRING (path); CHECK_STRING (login); netresult = netunam (SDATA (path), SDATA (login)); if (netresult == -1) return Qnil; else return Qt; } #endif /* HPUX_NET */ DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, Sfile_name_absolute_p, 1, 1, 0, doc: /* Return t if file FILENAME specifies an absolute file name. On Unix, this is a name starting with a `/' or a `~'. */) (filename) Lisp_Object filename; { CHECK_STRING (filename); return file_name_absolute_p (SDATA (filename)) ? Qt : Qnil; } /* Return nonzero if file FILENAME exists and can be executed. */ static int check_executable (filename) char *filename; { #ifdef DOS_NT int len = strlen (filename); char *suffix; struct stat st; if (stat (filename, &st) < 0) return 0; #if defined (WINDOWSNT) || (defined (MSDOS) && __DJGPP__ > 1) return ((st.st_mode & S_IEXEC) != 0); #else return (S_ISREG (st.st_mode) && len >= 5 && (stricmp ((suffix = filename + len-4), ".com") == 0 || stricmp (suffix, ".exe") == 0 || stricmp (suffix, ".bat") == 0) || (st.st_mode & S_IFMT) == S_IFDIR); #endif /* not WINDOWSNT */ #else /* not DOS_NT */ #ifdef HAVE_EUIDACCESS return (euidaccess (filename, 1) >= 0); #else /* Access isn't quite right because it uses the real uid and we really want to test with the effective uid. But Unix doesn't give us a right way to do it. */ return (access (filename, 1) >= 0); #endif #endif /* not DOS_NT */ } /* Return nonzero if file FILENAME exists and can be written. */ static int check_writable (filename) char *filename; { #ifdef MSDOS struct stat st; if (stat (filename, &st) < 0) return 0; return (st.st_mode & S_IWRITE || (st.st_mode & S_IFMT) == S_IFDIR); #else /* not MSDOS */ #ifdef HAVE_EUIDACCESS return (euidaccess (filename, 2) >= 0); #else /* Access isn't quite right because it uses the real uid and we really want to test with the effective uid. But Unix doesn't give us a right way to do it. Opening with O_WRONLY could work for an ordinary file, but would lose for directories. */ return (access (filename, 2) >= 0); #endif #endif /* not MSDOS */ } DEFUN ("file-exists-p", Ffile_exists_p, Sfile_exists_p, 1, 1, 0, doc: /* Return t if file FILENAME exists (whether or not you can read it.) See also `file-readable-p' and `file-attributes'. This returns nil for a symlink to a nonexistent file. Use `file-symlink-p' to test for such links. */) (filename) Lisp_Object filename; { Lisp_Object absname; Lisp_Object handler; struct stat statbuf; CHECK_STRING (filename); absname = Fexpand_file_name (filename, Qnil); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (absname, Qfile_exists_p); if (!NILP (handler)) return call2 (handler, Qfile_exists_p, absname); absname = ENCODE_FILE (absname); return (stat (SDATA (absname), &statbuf) >= 0) ? Qt : Qnil; } DEFUN ("file-executable-p", Ffile_executable_p, Sfile_executable_p, 1, 1, 0, doc: /* Return t if FILENAME can be executed by you. For a directory, this means you can access files in that directory. */) (filename) Lisp_Object filename; { Lisp_Object absname; Lisp_Object handler; CHECK_STRING (filename); absname = Fexpand_file_name (filename, Qnil); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (absname, Qfile_executable_p); if (!NILP (handler)) return call2 (handler, Qfile_executable_p, absname); absname = ENCODE_FILE (absname); return (check_executable (SDATA (absname)) ? Qt : Qnil); } DEFUN ("file-readable-p", Ffile_readable_p, Sfile_readable_p, 1, 1, 0, doc: /* Return t if file FILENAME exists and you can read it. See also `file-exists-p' and `file-attributes'. */) (filename) Lisp_Object filename; { Lisp_Object absname; Lisp_Object handler; int desc; int flags; struct stat statbuf; CHECK_STRING (filename); absname = Fexpand_file_name (filename, Qnil); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (absname, Qfile_readable_p); if (!NILP (handler)) return call2 (handler, Qfile_readable_p, absname); absname = ENCODE_FILE (absname); #if defined(DOS_NT) || defined(macintosh) /* Under MS-DOS, Windows, and Macintosh, open does not work for directories. */ if (access (SDATA (absname), 0) == 0) return Qt; return Qnil; #else /* not DOS_NT and not macintosh */ flags = O_RDONLY; #if defined (S_ISFIFO) && defined (O_NONBLOCK) /* Opening a fifo without O_NONBLOCK can wait. We don't want to wait. But we don't want to mess wth O_NONBLOCK except in the case of a fifo, on a system which handles it. */ desc = stat (SDATA (absname), &statbuf); if (desc < 0) return Qnil; if (S_ISFIFO (statbuf.st_mode)) flags |= O_NONBLOCK; #endif desc = emacs_open (SDATA (absname), flags, 0); if (desc < 0) return Qnil; emacs_close (desc); return Qt; #endif /* not DOS_NT and not macintosh */ } /* Having this before file-symlink-p mysteriously caused it to be forgotten on the RT/PC. */ DEFUN ("file-writable-p", Ffile_writable_p, Sfile_writable_p, 1, 1, 0, doc: /* Return t if file FILENAME can be written or created by you. */) (filename) Lisp_Object filename; { Lisp_Object absname, dir, encoded; Lisp_Object handler; struct stat statbuf; CHECK_STRING (filename); absname = Fexpand_file_name (filename, Qnil); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (absname, Qfile_writable_p); if (!NILP (handler)) return call2 (handler, Qfile_writable_p, absname); encoded = ENCODE_FILE (absname); if (stat (SDATA (encoded), &statbuf) >= 0) return (check_writable (SDATA (encoded)) ? Qt : Qnil); dir = Ffile_name_directory (absname); #ifdef VMS if (!NILP (dir)) dir = Fdirectory_file_name (dir); #endif /* VMS */ #ifdef MSDOS if (!NILP (dir)) dir = Fdirectory_file_name (dir); #endif /* MSDOS */ dir = ENCODE_FILE (dir); #ifdef WINDOWSNT /* The read-only attribute of the parent directory doesn't affect whether a file or directory can be created within it. Some day we should check ACLs though, which do affect this. */ if (stat (SDATA (dir), &statbuf) < 0) return Qnil; return (statbuf.st_mode & S_IFMT) == S_IFDIR ? Qt : Qnil; #else return (check_writable (!NILP (dir) ? (char *) SDATA (dir) : "") ? Qt : Qnil); #endif } DEFUN ("access-file", Faccess_file, Saccess_file, 2, 2, 0, doc: /* Access file FILENAME, and get an error if that does not work. The second argument STRING is used in the error message. If there is no error, returns nil. */) (filename, string) Lisp_Object filename, string; { Lisp_Object handler, encoded_filename, absname; int fd; CHECK_STRING (filename); absname = Fexpand_file_name (filename, Qnil); CHECK_STRING (string); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (absname, Qaccess_file); if (!NILP (handler)) return call3 (handler, Qaccess_file, absname, string); encoded_filename = ENCODE_FILE (absname); fd = emacs_open (SDATA (encoded_filename), O_RDONLY, 0); if (fd < 0) report_file_error (SDATA (string), Fcons (filename, Qnil)); emacs_close (fd); return Qnil; } DEFUN ("file-symlink-p", Ffile_symlink_p, Sfile_symlink_p, 1, 1, 0, doc: /* Return non-nil if file FILENAME is the name of a symbolic link. The value is the link target, as a string. Otherwise it returns nil. This function returns t when given the name of a symlink that points to a nonexistent file. */) (filename) Lisp_Object filename; { Lisp_Object handler; CHECK_STRING (filename); filename = Fexpand_file_name (filename, Qnil); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (filename, Qfile_symlink_p); if (!NILP (handler)) return call2 (handler, Qfile_symlink_p, filename); #ifdef S_IFLNK { char *buf; int bufsize; int valsize; Lisp_Object val; filename = ENCODE_FILE (filename); bufsize = 50; buf = NULL; do { bufsize *= 2; buf = (char *) xrealloc (buf, bufsize); bzero (buf, bufsize); errno = 0; valsize = readlink (SDATA (filename), buf, bufsize); if (valsize == -1) { #ifdef ERANGE /* HP-UX reports ERANGE if buffer is too small. */ if (errno == ERANGE) valsize = bufsize; else #endif { xfree (buf); return Qnil; } } } while (valsize >= bufsize); val = make_string (buf, valsize); if (buf[0] == '/' && index (buf, ':')) val = concat2 (build_string ("/:"), val); xfree (buf); val = DECODE_FILE (val); return val; } #else /* not S_IFLNK */ return Qnil; #endif /* not S_IFLNK */ } DEFUN ("file-directory-p", Ffile_directory_p, Sfile_directory_p, 1, 1, 0, doc: /* Return t if FILENAME names an existing directory. Symbolic links to directories count as directories. See `file-symlink-p' to distinguish symlinks. */) (filename) Lisp_Object filename; { register Lisp_Object absname; struct stat st; Lisp_Object handler; absname = expand_and_dir_to_file (filename, current_buffer->directory); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (absname, Qfile_directory_p); if (!NILP (handler)) return call2 (handler, Qfile_directory_p, absname); absname = ENCODE_FILE (absname); if (stat (SDATA (absname), &st) < 0) return Qnil; return (st.st_mode & S_IFMT) == S_IFDIR ? Qt : Qnil; } DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, Sfile_accessible_directory_p, 1, 1, 0, doc: /* Return t if file FILENAME names a directory you can open. For the value to be t, FILENAME must specify the name of a directory as a file, and the directory must allow you to open files in it. In order to use a directory as a buffer's current directory, this predicate must return true. A directory name spec may be given instead; then the value is t if the directory so specified exists and really is a readable and searchable directory. */) (filename) Lisp_Object filename; { Lisp_Object handler; int tem; struct gcpro gcpro1; /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (filename, Qfile_accessible_directory_p); if (!NILP (handler)) return call2 (handler, Qfile_accessible_directory_p, filename); GCPRO1 (filename); tem = (NILP (Ffile_directory_p (filename)) || NILP (Ffile_executable_p (filename))); UNGCPRO; return tem ? Qnil : Qt; } DEFUN ("file-regular-p", Ffile_regular_p, Sfile_regular_p, 1, 1, 0, doc: /* Return t if FILENAME names a regular file. This is the sort of file that holds an ordinary stream of data bytes. Symbolic links to regular files count as regular files. See `file-symlink-p' to distinguish symlinks. */) (filename) Lisp_Object filename; { register Lisp_Object absname; struct stat st; Lisp_Object handler; absname = expand_and_dir_to_file (filename, current_buffer->directory); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (absname, Qfile_regular_p); if (!NILP (handler)) return call2 (handler, Qfile_regular_p, absname); absname = ENCODE_FILE (absname); #ifdef WINDOWSNT { int result; Lisp_Object tem = Vw32_get_true_file_attributes; /* Tell stat to use expensive method to get accurate info. */ Vw32_get_true_file_attributes = Qt; result = stat (SDATA (absname), &st); Vw32_get_true_file_attributes = tem; if (result < 0) return Qnil; return (st.st_mode & S_IFMT) == S_IFREG ? Qt : Qnil; } #else if (stat (SDATA (absname), &st) < 0) return Qnil; return (st.st_mode & S_IFMT) == S_IFREG ? Qt : Qnil; #endif } DEFUN ("file-modes", Ffile_modes, Sfile_modes, 1, 1, 0, doc: /* Return mode bits of file named FILENAME, as an integer. Return nil, if file does not exist or is not accessible. */) (filename) Lisp_Object filename; { Lisp_Object absname; struct stat st; Lisp_Object handler; absname = expand_and_dir_to_file (filename, current_buffer->directory); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (absname, Qfile_modes); if (!NILP (handler)) return call2 (handler, Qfile_modes, absname); absname = ENCODE_FILE (absname); if (stat (SDATA (absname), &st) < 0) return Qnil; #if defined (MSDOS) && __DJGPP__ < 2 if (check_executable (SDATA (absname))) st.st_mode |= S_IEXEC; #endif /* MSDOS && __DJGPP__ < 2 */ return make_number (st.st_mode & 07777); } DEFUN ("set-file-modes", Fset_file_modes, Sset_file_modes, 2, 2, 0, doc: /* Set mode bits of file named FILENAME to MODE (an integer). Only the 12 low bits of MODE are used. */) (filename, mode) Lisp_Object filename, mode; { Lisp_Object absname, encoded_absname; Lisp_Object handler; absname = Fexpand_file_name (filename, current_buffer->directory); CHECK_NUMBER (mode); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (absname, Qset_file_modes); if (!NILP (handler)) return call3 (handler, Qset_file_modes, absname, mode); encoded_absname = ENCODE_FILE (absname); if (chmod (SDATA (encoded_absname), XINT (mode)) < 0) report_file_error ("Doing chmod", Fcons (absname, Qnil)); return Qnil; } DEFUN ("set-default-file-modes", Fset_default_file_modes, Sset_default_file_modes, 1, 1, 0, doc: /* Set the file permission bits for newly created files. The argument MODE should be an integer; only the low 9 bits are used. This setting is inherited by subprocesses. */) (mode) Lisp_Object mode; { CHECK_NUMBER (mode); umask ((~ XINT (mode)) & 0777); return Qnil; } DEFUN ("default-file-modes", Fdefault_file_modes, Sdefault_file_modes, 0, 0, 0, doc: /* Return the default file protection for created files. The value is an integer. */) () { int realmask; Lisp_Object value; realmask = umask (0); umask (realmask); XSETINT (value, (~ realmask) & 0777); return value; } extern int lisp_time_argument P_ ((Lisp_Object, time_t *, int *)); DEFUN ("set-file-times", Fset_file_times, Sset_file_times, 1, 2, 0, doc: /* Set times of file FILENAME to TIME. Set both access and modification times. Return t on success, else nil. Use the current time if TIME is nil. TIME is in the format of `current-time'. */) (filename, time) Lisp_Object filename, time; { Lisp_Object absname, encoded_absname; Lisp_Object handler; time_t sec; int usec; if (! lisp_time_argument (time, &sec, &usec)) error ("Invalid time specification"); absname = Fexpand_file_name (filename, current_buffer->directory); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (absname, Qset_file_times); if (!NILP (handler)) return call3 (handler, Qset_file_times, absname, time); encoded_absname = ENCODE_FILE (absname); { EMACS_TIME t; EMACS_SET_SECS (t, sec); EMACS_SET_USECS (t, usec); if (set_file_times (SDATA (encoded_absname), t, t)) { #ifdef DOS_NT struct stat st; /* Setting times on a directory always fails. */ if (stat (SDATA (encoded_absname), &st) == 0 && (st.st_mode & S_IFMT) == S_IFDIR) return Qnil; #endif report_file_error ("Setting file times", Fcons (absname, Qnil)); return Qnil; } } return Qt; } #ifdef HAVE_SYNC DEFUN ("unix-sync", Funix_sync, Sunix_sync, 0, 0, "", doc: /* Tell Unix to finish all pending disk updates. */) () { sync (); return Qnil; } #endif /* HAVE_SYNC */ DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, Sfile_newer_than_file_p, 2, 2, 0, doc: /* Return t if file FILE1 is newer than file FILE2. If FILE1 does not exist, the answer is nil; otherwise, if FILE2 does not exist, the answer is t. */) (file1, file2) Lisp_Object file1, file2; { Lisp_Object absname1, absname2; struct stat st; int mtime1; Lisp_Object handler; struct gcpro gcpro1, gcpro2; CHECK_STRING (file1); CHECK_STRING (file2); absname1 = Qnil; GCPRO2 (absname1, file2); absname1 = expand_and_dir_to_file (file1, current_buffer->directory); absname2 = expand_and_dir_to_file (file2, current_buffer->directory); UNGCPRO; /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (absname1, Qfile_newer_than_file_p); if (NILP (handler)) handler = Ffind_file_name_handler (absname2, Qfile_newer_than_file_p); if (!NILP (handler)) return call3 (handler, Qfile_newer_than_file_p, absname1, absname2); GCPRO2 (absname1, absname2); absname1 = ENCODE_FILE (absname1); absname2 = ENCODE_FILE (absname2); UNGCPRO; if (stat (SDATA (absname1), &st) < 0) return Qnil; mtime1 = st.st_mtime; if (stat (SDATA (absname2), &st) < 0) return Qt; return (mtime1 > st.st_mtime) ? Qt : Qnil; } #ifdef DOS_NT Lisp_Object Qfind_buffer_file_type; #endif /* DOS_NT */ #ifndef READ_BUF_SIZE #define READ_BUF_SIZE (64 << 10) #endif extern void adjust_markers_for_delete P_ ((int, int, int, int)); /* This function is called after Lisp functions to decide a coding system are called, or when they cause an error. Before they are called, the current buffer is set unibyte and it contains only a newly inserted text (thus the buffer was empty before the insertion). The functions may set markers, overlays, text properties, or even alter the buffer contents, change the current buffer. Here, we reset all those changes by: o set back the current buffer. o move all markers and overlays to BEG. o remove all text properties. o set back the buffer multibyteness. */ static Lisp_Object decide_coding_unwind (unwind_data) Lisp_Object unwind_data; { Lisp_Object multibyte, undo_list, buffer; multibyte = XCAR (unwind_data); unwind_data = XCDR (unwind_data); undo_list = XCAR (unwind_data); buffer = XCDR (unwind_data); if (current_buffer != XBUFFER (buffer)) set_buffer_internal (XBUFFER (buffer)); adjust_markers_for_delete (BEG, BEG_BYTE, Z, Z_BYTE); adjust_overlays_for_delete (BEG, Z - BEG); BUF_INTERVALS (current_buffer) = 0; TEMP_SET_PT_BOTH (BEG, BEG_BYTE); /* Now we are safe to change the buffer's multibyteness directly. */ current_buffer->enable_multibyte_characters = multibyte; current_buffer->undo_list = undo_list; return Qnil; } /* Used to pass values from insert-file-contents to read_non_regular. */ static int non_regular_fd; static int non_regular_inserted; static int non_regular_nbytes; /* Read from a non-regular file. Read non_regular_trytry bytes max from non_regular_fd. Non_regular_inserted specifies where to put the read bytes. Value is the number of bytes read. */ static Lisp_Object read_non_regular () { int nbytes; immediate_quit = 1; QUIT; nbytes = emacs_read (non_regular_fd, BEG_ADDR + PT_BYTE - BEG_BYTE + non_regular_inserted, non_regular_nbytes); immediate_quit = 0; return make_number (nbytes); } /* Condition-case handler used when reading from non-regular files in insert-file-contents. */ static Lisp_Object read_non_regular_quit () { return Qnil; } DEFUN ("insert-file-contents", Finsert_file_contents, Sinsert_file_contents, 1, 5, 0, doc: /* Insert contents of file FILENAME after point. Returns list of absolute file name and number of characters inserted. If second argument VISIT is non-nil, the buffer's visited filename and last save file modtime are set, and it is marked unmodified. If visiting and the file does not exist, visiting is completed before the error is signaled. The optional third and fourth arguments BEG and END specify what portion of the file to insert. These arguments count bytes in the file, not characters in the buffer. If VISIT is non-nil, BEG and END must be nil. If optional fifth argument REPLACE is non-nil, it means replace the current buffer contents (in the accessible portion) with the file contents. This is better than simply deleting and inserting the whole thing because (1) it preserves some marker positions and (2) it puts less data in the undo list. When REPLACE is non-nil, the value is the number of characters actually read, which is often less than the number of characters to be read. This does code conversion according to the value of `coding-system-for-read' or `file-coding-system-alist', and sets the variable `last-coding-system-used' to the coding system actually used. */) (filename, visit, beg, end, replace) Lisp_Object filename, visit, beg, end, replace; { struct stat st; register int fd; int inserted = 0; register int how_much; register int unprocessed; int count = SPECPDL_INDEX (); struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; Lisp_Object handler, val, insval, orig_filename; Lisp_Object p; int total = 0; int not_regular = 0; unsigned char read_buf[READ_BUF_SIZE]; struct coding_system coding; unsigned char buffer[1 << 14]; int replace_handled = 0; int set_coding_system = 0; int coding_system_decided = 0; int read_quit = 0; Lisp_Object old_Vdeactivate_mark = Vdeactivate_mark; int we_locked_file = 0; if (current_buffer->base_buffer && ! NILP (visit)) error ("Cannot do file visiting in an indirect buffer"); if (!NILP (current_buffer->read_only)) Fbarf_if_buffer_read_only (); val = Qnil; p = Qnil; orig_filename = Qnil; GCPRO4 (filename, val, p, orig_filename); CHECK_STRING (filename); filename = Fexpand_file_name (filename, Qnil); /* If the file name has special constructs in it, call the corresponding file handler. */ handler = Ffind_file_name_handler (filename, Qinsert_file_contents); if (!NILP (handler)) { val = call6 (handler, Qinsert_file_contents, filename, visit, beg, end, replace); if (CONSP (val) && CONSP (XCDR (val))) inserted = XINT (XCAR (XCDR (val))); goto handled; } orig_filename = filename; filename = ENCODE_FILE (filename); fd = -1; #ifdef WINDOWSNT { Lisp_Object tem = Vw32_get_true_file_attributes; /* Tell stat to use expensive method to get accurate info. */ Vw32_get_true_file_attributes = Qt; total = stat (SDATA (filename), &st); Vw32_get_true_file_attributes = tem; } if (total < 0) #else #ifndef APOLLO if (stat (SDATA (filename), &st) < 0) #else if ((fd = emacs_open (SDATA (filename), O_RDONLY, 0)) < 0 || fstat (fd, &st) < 0) #endif /* not APOLLO */ #endif /* WINDOWSNT */ { if (fd >= 0) emacs_close (fd); badopen: if (NILP (visit)) report_file_error ("Opening input file", Fcons (orig_filename, Qnil)); st.st_mtime = -1; how_much = 0; if (!NILP (Vcoding_system_for_read)) Fset (Qbuffer_file_coding_system, Vcoding_system_for_read); goto notfound; } #ifdef S_IFREG /* This code will need to be changed in order to work on named pipes, and it's probably just not worth it. So we should at least signal an error. */ if (!S_ISREG (st.st_mode)) { not_regular = 1; if (! NILP (visit)) goto notfound; if (! NILP (replace) || ! NILP (beg) || ! NILP (end)) xsignal2 (Qfile_error, build_string ("not a regular file"), orig_filename); } #endif if (fd < 0) if ((fd = emacs_open (SDATA (filename), O_RDONLY, 0)) < 0) goto badopen; /* Replacement should preserve point as it preserves markers. */ if (!NILP (replace)) record_unwind_protect (restore_point_unwind, Fpoint_marker ()); record_unwind_protect (close_file_unwind, make_number (fd)); /* Supposedly happens on VMS. */ /* Can happen on any platform that uses long as type of off_t, but allows file sizes to exceed 2Gb. VMS is no longer officially supported, so give a message suitable for the latter case. */ if (! not_regular && st.st_size < 0) error ("Maximum buffer size exceeded"); /* Prevent redisplay optimizations. */ current_buffer->clip_changed = 1; if (!NILP (visit)) { if (!NILP (beg) || !NILP (end)) error ("Attempt to visit less than an entire file"); if (BEG < Z && NILP (replace)) error ("Cannot do file visiting in a non-empty buffer"); } if (!NILP (beg)) CHECK_NUMBER (beg); else XSETFASTINT (beg, 0); if (!NILP (end)) CHECK_NUMBER (end); else { if (! not_regular) { XSETINT (end, st.st_size); /* Arithmetic overflow can occur if an Emacs integer cannot represent the file size, or if the calculations below overflow. The calculations below double the file size twice, so check that it can be multiplied by 4 safely. */ if (XINT (end) != st.st_size || ((int) st.st_size * 4) / 4 != st.st_size) error ("Maximum buffer size exceeded"); /* The file size returned from stat may be zero, but data may be readable nonetheless, for example when this is a file in the /proc filesystem. */ if (st.st_size == 0) XSETINT (end, READ_BUF_SIZE); } } if (EQ (Vcoding_system_for_read, Qauto_save_coding)) { /* We use emacs-mule for auto saving... */ setup_coding_system (Qemacs_mule, &coding); /* ... but with the special flag to indicate to read in a multibyte sequence for eight-bit-control char as is. */ coding.flags = 1; coding.src_multibyte = 0; coding.dst_multibyte = !NILP (current_buffer->enable_multibyte_characters); coding.eol_type = CODING_EOL_LF; coding_system_decided = 1; } else if (BEG < Z) { /* Decide the coding system to use for reading the file now because we can't use an optimized method for handling `coding:' tag if the current buffer is not empty. */ Lisp_Object val; val = Qnil; if (!NILP (Vcoding_system_for_read)) val = Vcoding_system_for_read; else { /* Don't try looking inside a file for a coding system specification if it is not seekable. */ if (! not_regular && ! NILP (Vset_auto_coding_function)) { /* Find a coding system specified in the heading two lines or in the tailing several lines of the file. We assume that the 1K-byte and 3K-byte for heading and tailing respectively are sufficient for this purpose. */ int nread; if (st.st_size <= (1024 * 4)) nread = emacs_read (fd, read_buf, 1024 * 4); else { nread = emacs_read (fd, read_buf, 1024); if (nread >= 0) { if (lseek (fd, st.st_size - (1024 * 3), 0) < 0) report_file_error ("Setting file position", Fcons (orig_filename, Qnil)); nread += emacs_read (fd, read_buf + nread, 1024 * 3); } } if (nread < 0) error ("IO error reading %s: %s", SDATA (orig_filename), emacs_strerror (errno)); else if (nread > 0) { struct buffer *prev = current_buffer; Lisp_Object buffer; struct buffer *buf; record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); buffer = Fget_buffer_create (build_string (" *code-converting-work*")); buf = XBUFFER (buffer); delete_all_overlays (buf); buf->directory = current_buffer->directory; buf->read_only = Qnil; buf->filename = Qnil; buf->undo_list = Qt; eassert (buf->overlays_before == NULL); eassert (buf->overlays_after == NULL); set_buffer_internal (buf); Ferase_buffer (); buf->enable_multibyte_characters = Qnil; insert_1_both (read_buf, nread, nread, 0, 0, 0); TEMP_SET_PT_BOTH (BEG, BEG_BYTE); val = call2 (Vset_auto_coding_function, filename, make_number (nread)); set_buffer_internal (prev); /* Discard the unwind protect for recovering the current buffer. */ specpdl_ptr--; /* Rewind the file for the actual read done later. */ if (lseek (fd, 0, 0) < 0) report_file_error ("Setting file position", Fcons (orig_filename, Qnil)); } } if (NILP (val)) { /* If we have not yet decided a coding system, check file-coding-system-alist. */ Lisp_Object args[6], coding_systems; args[0] = Qinsert_file_contents, args[1] = orig_filename; args[2] = visit, args[3] = beg, args[4] = end, args[5] = replace; coding_systems = Ffind_operation_coding_system (6, args); if (CONSP (coding_systems)) val = XCAR (coding_systems); } } setup_coding_system (Fcheck_coding_system (val), &coding); /* Ensure we set Vlast_coding_system_used. */ set_coding_system = 1; if (NILP (current_buffer->enable_multibyte_characters) && ! NILP (val)) /* We must suppress all character code conversion except for end-of-line conversion. */ setup_raw_text_coding_system (&coding); coding.src_multibyte = 0; coding.dst_multibyte = !NILP (current_buffer->enable_multibyte_characters); coding_system_decided = 1; } /* If requested, replace the accessible part of the buffer with the file contents. Avoid replacing text at the beginning or end of the buffer that matches the file contents; that preserves markers pointing to the unchanged parts. Here we implement this feature in an optimized way for the case where code conversion is NOT needed. The following if-statement handles the case of conversion in a less optimal way. If the code conversion is "automatic" then we try using this method and hope for the best. But if we discover the need for conversion, we give up on this method and let the following if-statement handle the replace job. */ if (!NILP (replace) && BEGV < ZV && !(coding.common_flags & CODING_REQUIRE_DECODING_MASK)) { /* same_at_start and same_at_end count bytes, because file access counts bytes and BEG and END count bytes. */ int same_at_start = BEGV_BYTE; int same_at_end = ZV_BYTE; int overlap; /* There is still a possibility we will find the need to do code conversion. If that happens, we set this variable to 1 to give up on handling REPLACE in the optimized way. */ int giveup_match_end = 0; if (XINT (beg) != 0) { if (lseek (fd, XINT (beg), 0) < 0) report_file_error ("Setting file position", Fcons (orig_filename, Qnil)); } immediate_quit = 1; QUIT; /* Count how many chars at the start of the file match the text at the beginning of the buffer. */ while (1) { int nread, bufpos; nread = emacs_read (fd, buffer, sizeof buffer); if (nread < 0) error ("IO error reading %s: %s", SDATA (orig_filename), emacs_strerror (errno)); else if (nread == 0) break; if (coding.type == coding_type_undecided) detect_coding (&coding, buffer, nread); if (coding.common_flags & CODING_REQUIRE_DECODING_MASK) /* We found that the file should be decoded somehow. Let's give up here. */ { giveup_match_end = 1; break; } if (coding.eol_type == CODING_EOL_UNDECIDED) detect_eol (&coding, buffer, nread); if (coding.eol_type != CODING_EOL_UNDECIDED && coding.eol_type != CODING_EOL_LF) /* We found that the format of eol should be decoded. Let's give up here. */ { giveup_match_end = 1; break; } bufpos = 0; while (bufpos < nread && same_at_start < ZV_BYTE && FETCH_BYTE (same_at_start) == buffer[bufpos]) same_at_start++, bufpos++; /* If we found a discrepancy, stop the scan. Otherwise loop around and scan the next bufferful. */ if (bufpos != nread) break; } immediate_quit = 0; /* If the file matches the buffer completely, there's no need to replace anything. */ if (same_at_start - BEGV_BYTE == XINT (end)) { emacs_close (fd); specpdl_ptr--; /* Truncate the buffer to the size of the file. */ del_range_1 (same_at_start, same_at_end, 0, 0); goto handled; } immediate_quit = 1; QUIT; /* Count how many chars at the end of the file match the text at the end of the buffer. But, if we have already found that decoding is necessary, don't waste time. */ while (!giveup_match_end) { int total_read, nread, bufpos, curpos, trial; /* At what file position are we now scanning? */ curpos = XINT (end) - (ZV_BYTE - same_at_end); /* If the entire file matches the buffer tail, stop the scan. */ if (curpos == 0) break; /* How much can we scan in the next step? */ trial = min (curpos, sizeof buffer); if (lseek (fd, curpos - trial, 0) < 0) report_file_error ("Setting file position", Fcons (orig_filename, Qnil)); total_read = nread = 0; while (total_read < trial) { nread = emacs_read (fd, buffer + total_read, trial - total_read); if (nread < 0) error ("IO error reading %s: %s", SDATA (orig_filename), emacs_strerror (errno)); else if (nread == 0) break; total_read += nread; } /* Scan this bufferful from the end, comparing with the Emacs buffer. */ bufpos = total_read; /* Compare with same_at_start to avoid counting some buffer text as matching both at the file's beginning and at the end. */ while (bufpos > 0 && same_at_end > same_at_start && FETCH_BYTE (same_at_end - 1) == buffer[bufpos - 1]) same_at_end--, bufpos--; /* If we found a discrepancy, stop the scan. Otherwise loop around and scan the preceding bufferful. */ if (bufpos != 0) { /* If this discrepancy is because of code conversion, we cannot use this method; giveup and try the other. */ if (same_at_end > same_at_start && FETCH_BYTE (same_at_end - 1) >= 0200 && ! NILP (current_buffer->enable_multibyte_characters) && (CODING_MAY_REQUIRE_DECODING (&coding))) giveup_match_end = 1; break; } if (nread == 0) break; } immediate_quit = 0; if (! giveup_match_end) { int temp; /* We win! We can handle REPLACE the optimized way. */ /* Extend the start of non-matching text area to multibyte character boundary. */ if (! NILP (current_buffer->enable_multibyte_characters)) while (same_at_start > BEGV_BYTE && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start))) same_at_start--; /* Extend the end of non-matching text area to multibyte character boundary. */ if (! NILP (current_buffer->enable_multibyte_characters)) while (same_at_end < ZV_BYTE && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end))) same_at_end++; /* Don't try to reuse the same piece of text twice. */ overlap = (same_at_start - BEGV_BYTE - (same_at_end + st.st_size - ZV)); if (overlap > 0) same_at_end += overlap; /* Arrange to read only the nonmatching middle part of the file. */ XSETFASTINT (beg, XINT (beg) + (same_at_start - BEGV_BYTE)); XSETFASTINT (end, XINT (end) - (ZV_BYTE - same_at_end)); del_range_byte (same_at_start, same_at_end, 0); /* Insert from the file at the proper position. */ temp = BYTE_TO_CHAR (same_at_start); SET_PT_BOTH (temp, same_at_start); /* If display currently starts at beginning of line, keep it that way. */ if (XBUFFER (XWINDOW (selected_window)->buffer) == current_buffer) XWINDOW (selected_window)->start_at_line_beg = Fbolp (); replace_handled = 1; } } /* If requested, replace the accessible part of the buffer with the file contents. Avoid replacing text at the beginning or end of the buffer that matches the file contents; that preserves markers pointing to the unchanged parts. Here we implement this feature for the case where code conversion is needed, in a simple way that needs a lot of memory. The preceding if-statement handles the case of no conversion in a more optimized way. */ if (!NILP (replace) && ! replace_handled && BEGV < ZV) { int same_at_start = BEGV_BYTE; int same_at_end = ZV_BYTE; int overlap; int bufpos; /* Make sure that the gap is large enough. */ int bufsize = 2 * st.st_size; unsigned char *conversion_buffer = (unsigned char *) xmalloc (bufsize); int temp; /* First read the whole file, performing code conversion into CONVERSION_BUFFER. */ if (lseek (fd, XINT (beg), 0) < 0) { xfree (conversion_buffer); report_file_error ("Setting file position", Fcons (orig_filename, Qnil)); } total = st.st_size; /* Total bytes in the file. */ how_much = 0; /* Bytes read from file so far. */ inserted = 0; /* Bytes put into CONVERSION_BUFFER so far. */ unprocessed = 0; /* Bytes not processed in previous loop. */ while (how_much < total) { /* try is reserved in some compilers (Microsoft C) */ int trytry = min (total - how_much, READ_BUF_SIZE - unprocessed); unsigned char *destination = read_buf + unprocessed; int this; /* Allow quitting out of the actual I/O. */ immediate_quit = 1; QUIT; this = emacs_read (fd, destination, trytry); immediate_quit = 0; if (this < 0 || this + unprocessed == 0) { how_much = this; break; } how_much += this; if (CODING_MAY_REQUIRE_DECODING (&coding)) { int require, result; this += unprocessed; /* If we are using more space than estimated, make CONVERSION_BUFFER bigger. */ require = decoding_buffer_size (&coding, this); if (inserted + require + 2 * (total - how_much) > bufsize) { bufsize = inserted + require + 2 * (total - how_much); conversion_buffer = (unsigned char *) xrealloc (conversion_buffer, bufsize); } /* Convert this batch with results in CONVERSION_BUFFER. */ if (how_much >= total) /* This is the last block. */ coding.mode |= CODING_MODE_LAST_BLOCK; if (coding.composing != COMPOSITION_DISABLED) coding_allocate_composition_data (&coding, BEGV); result = decode_coding (&coding, read_buf, conversion_buffer + inserted, this, bufsize - inserted); /* Save for next iteration whatever we didn't convert. */ unprocessed = this - coding.consumed; bcopy (read_buf + coding.consumed, read_buf, unprocessed); if (!NILP (current_buffer->enable_multibyte_characters)) this = coding.produced; else this = str_as_unibyte (conversion_buffer + inserted, coding.produced); } inserted += this; } /* At this point, INSERTED is how many characters (i.e. bytes) are present in CONVERSION_BUFFER. HOW_MUCH should equal TOTAL, or should be <= 0 if we couldn't read the file. */ if (how_much < 0) { xfree (conversion_buffer); coding_free_composition_data (&coding); error ("IO error reading %s: %s", SDATA (orig_filename), emacs_strerror (errno)); } /* Compare the beginning of the converted file with the buffer text. */ bufpos = 0; while (bufpos < inserted && same_at_start < same_at_end && FETCH_BYTE (same_at_start) == conversion_buffer[bufpos]) same_at_start++, bufpos++; /* If the file matches the buffer completely, there's no need to replace anything. */ if (bufpos == inserted) { xfree (conversion_buffer); coding_free_composition_data (&coding); emacs_close (fd); specpdl_ptr--; /* Truncate the buffer to the size of the file. */ del_range_byte (same_at_start, same_at_end, 0); inserted = 0; goto handled; } /* Extend the start of non-matching text area to multibyte character boundary. */ if (! NILP (current_buffer->enable_multibyte_characters)) while (same_at_start > BEGV_BYTE && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start))) same_at_start--; /* Scan this bufferful from the end, comparing with the Emacs buffer. */ bufpos = inserted; /* Compare with same_at_start to avoid counting some buffer text as matching both at the file's beginning and at the end. */ while (bufpos > 0 && same_at_end > same_at_start && FETCH_BYTE (same_at_end - 1) == conversion_buffer[bufpos - 1]) same_at_end--, bufpos--; /* Extend the end of non-matching text area to multibyte character boundary. */ if (! NILP (current_buffer->enable_multibyte_characters)) while (same_at_end < ZV_BYTE && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end))) same_at_end++; /* Don't try to reuse the same piece of text twice. */ overlap = same_at_start - BEGV_BYTE - (same_at_end + inserted - ZV_BYTE); if (overlap > 0) same_at_end += overlap; /* If display currently starts at beginning of line, keep it that way. */ if (XBUFFER (XWINDOW (selected_window)->buffer) == current_buffer) XWINDOW (selected_window)->start_at_line_beg = Fbolp (); /* Replace the chars that we need to replace, and update INSERTED to equal the number of bytes we are taking from the file. */ inserted -= (ZV_BYTE - same_at_end) + (same_at_start - BEGV_BYTE); if (same_at_end != same_at_start) { del_range_byte (same_at_start, same_at_end, 0); temp = GPT; same_at_start = GPT_BYTE; } else { temp = BYTE_TO_CHAR (same_at_start); } /* Insert from the file at the proper position. */ SET_PT_BOTH (temp, same_at_start); insert_1 (conversion_buffer + same_at_start - BEGV_BYTE, inserted, 0, 0, 0); if (coding.cmp_data && coding.cmp_data->used) coding_restore_composition (&coding, Fcurrent_buffer ()); coding_free_composition_data (&coding); /* Set `inserted' to the number of inserted characters. */ inserted = PT - temp; /* Set point before the inserted characters. */ SET_PT_BOTH (temp, same_at_start); xfree (conversion_buffer); emacs_close (fd); specpdl_ptr--; goto handled; } if (! not_regular) { register Lisp_Object temp; total = XINT (end) - XINT (beg); /* Make sure point-max won't overflow after this insertion. */ XSETINT (temp, total); if (total != XINT (temp)) error ("Maximum buffer size exceeded"); } else /* For a special file, all we can do is guess. */ total = READ_BUF_SIZE; if (NILP (visit) && inserted > 0) { #ifdef CLASH_DETECTION if (!NILP (current_buffer->file_truename) /* Make binding buffer-file-name to nil effective. */ && !NILP (current_buffer->filename) && SAVE_MODIFF >= MODIFF) we_locked_file = 1; #endif /* CLASH_DETECTION */ prepare_to_modify_buffer (GPT, GPT, NULL); } move_gap (PT); if (GAP_SIZE < total) make_gap (total - GAP_SIZE); if (XINT (beg) != 0 || !NILP (replace)) { if (lseek (fd, XINT (beg), 0) < 0) report_file_error ("Setting file position", Fcons (orig_filename, Qnil)); } /* In the following loop, HOW_MUCH contains the total bytes read so far for a regular file, and not changed for a special file. But, before exiting the loop, it is set to a negative value if I/O error occurs. */ how_much = 0; /* Total bytes inserted. */ inserted = 0; /* Here, we don't do code conversion in the loop. It is done by code_convert_region after all data are read into the buffer. */ { int gap_size = GAP_SIZE; while (how_much < total) { /* try is reserved in some compilers (Microsoft C) */ int trytry = min (total - how_much, READ_BUF_SIZE); int this; if (not_regular) { Lisp_Object val; /* Maybe make more room. */ if (gap_size < trytry) { make_gap (total - gap_size); gap_size = GAP_SIZE; } /* Read from the file, capturing `quit'. When an error occurs, end the loop, and arrange for a quit to be signaled after decoding the text we read. */ non_regular_fd = fd; non_regular_inserted = inserted; non_regular_nbytes = trytry; val = internal_condition_case_1 (read_non_regular, Qnil, Qerror, read_non_regular_quit); if (NILP (val)) { read_quit = 1; break; } this = XINT (val); } else { /* Allow quitting out of the actual I/O. We don't make text part of the buffer until all the reading is done, so a C-g here doesn't do any harm. */ immediate_quit = 1; QUIT; this = emacs_read (fd, BEG_ADDR + PT_BYTE - BEG_BYTE + inserted, trytry); immediate_quit = 0; } if (this <= 0) { how_much = this; break; } gap_size -= this; /* For a regular file, where TOTAL is the real size, count HOW_MUCH to compare with it. For a special file, where TOTAL is just a buffer size, so don't bother counting in HOW_MUCH. (INSERTED is where we count the number of characters inserted.) */ if (! not_regular) how_much += this; inserted += this; } } /* Now we have rea