1 /* @IGNORE@ -*- c -*- */
2 /* @IGNORE@ This file is a template from which both stat.c and lstat.c
3 @IGNORE@ are generated. */
4 /* Work around the bug in some systems whereby @xstat@ succeeds when
5 given the zero-length file name argument. The @xstat@ from SunOS4.1.4
7 Copyright (C) 1997-2001 Free Software Foundation, Inc.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software Foundation,
21 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
23 /* written by Jim Meyering */
27 #include <sys/types.h>
39 #ifdef STAT_MACROS_BROKEN
42 #if !defined(S_ISLNK) && defined(S_IFLNK)
43 # define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
46 #ifndef HAVE_DECL_FREE
47 "this configure-time declaration test was not run"
55 /* lstat works differently on Linux and Solaris systems. POSIX (see
56 `pathname resolution' in the glossary) requires that programs like `ls'
57 take into consideration the fact that FILE has a trailing slash when
58 FILE is a symbolic link. On Linux systems, the lstat function already
59 has the desired semantics (in treating `lstat("symlink/",sbuf)' just like
60 `lstat("symlink/.",sbuf)', but on Solaris it does not.
62 If FILE has a trailing slash and specifies a symbolic link,
63 then append a `.' to FILE and call lstat a second time. */
66 slash_aware_lstat (const char *file, struct stat *sbuf)
71 int lstat_result = lstat (file, sbuf);
73 if (lstat_result != 0 || !S_ISLNK (sbuf->st_mode))
77 if (file[len - 1] != '/')
80 /* FILE refers to a symbolic link and the name ends with a slash.
81 Append a `.' to FILE and repeat the lstat call. */
83 /* Add one for the `.' we'll append, and one more for the trailing NUL. */
84 new_file = xmalloc (len + 1 + 1);
85 memcpy (new_file, file, len);
87 new_file[len + 1] = 0;
89 lstat_result = lstat (new_file, sbuf);
96 /* This is a wrapper for @xstat@(2).
97 If FILE is the empty string, fail with errno == ENOENT.
98 Otherwise, return the result of calling the real @xstat@.
100 This works around the bug in some systems whereby @xstat@ succeeds when
101 given the zero-length file name argument. The @xstat@ from SunOS4.1.4
105 /* This function also provides a version of lstat with consistent semantics
106 when FILE specifies a symbolic link and has a trailing slash. */
110 rpl_@xstat@ (const char *file, struct stat *sbuf)
112 if (file && *file == 0)
119 return slash_aware_lstat (file, sbuf);
122 return stat (file, sbuf);