1 /* Open a stream to a file.
2 Copyright (C) 2007-2011 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* Written by Bruno Haible <bruno@clisp.org>, 2007. */
21 /* Get the original definition of fopen. It might be defined as a macro. */
27 orig_fopen (const char *filename, const char *mode)
29 return fopen (filename, mode);
39 #include <sys/types.h>
43 rpl_fopen (const char *filename, const char *mode)
45 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
46 if (strcmp (filename, "/dev/null") == 0)
50 #if FOPEN_TRAILING_SLASH_BUG
51 /* If the filename ends in a slash and a mode that requires write access is
53 Rationale: POSIX <http://www.opengroup.org/susv3/basedefs/xbd_chap04.html>
55 "A pathname that contains at least one non-slash character and that
56 ends with one or more trailing slashes shall be resolved as if a
57 single dot character ( '.' ) were appended to the pathname."
59 "The special filename dot shall refer to the directory specified by
61 If the named file already exists as a directory, then if a mode that
62 requires write access is specified, fopen() must fail because POSIX
63 <http://www.opengroup.org/susv3/functions/fopen.html> says that it
64 fails with errno = EISDIR in this case.
65 If the named file does not exist or does not name a directory, then
66 fopen() must fail since the file does not contain a '.' directory. */
68 size_t len = strlen (filename);
69 if (len > 0 && filename[len - 1] == '/')
75 if (mode[0] == 'w' || mode[0] == 'a')
81 fd = open (filename, O_RDONLY);
85 if (fstat (fd, &statbuf) >= 0 && !S_ISDIR (statbuf.st_mode))
92 fp = fdopen (fd, mode);
95 int saved_errno = errno;
104 return orig_fopen (filename, mode);