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) 1997-2002 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
45 # define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
51 #ifndef HAVE_DECL_FREE
52 "this configure-time declaration test was not run"
60 /* lstat works differently on Linux and Solaris systems. POSIX (see
61 `pathname resolution' in the glossary) requires that programs like `ls'
62 take into consideration the fact that FILE has a trailing slash when
63 FILE is a symbolic link. On Linux systems, the lstat function already
64 has the desired semantics (in treating `lstat("symlink/",sbuf)' just like
65 `lstat("symlink/.",sbuf)', but on Solaris it does not.
67 If FILE has a trailing slash and specifies a symbolic link,
68 then append a `.' to FILE and call lstat a second time. */
71 slash_aware_lstat (const char *file, struct stat *sbuf)
76 int lstat_result = lstat (file, sbuf);
78 if (lstat_result != 0 || !S_ISLNK (sbuf->st_mode))
82 if (file[len - 1] != '/')
85 /* FILE refers to a symbolic link and the name ends with a slash.
86 Append a `.' to FILE and repeat the lstat call. */
88 /* Add one for the `.' we'll append, and one more for the trailing NUL. */
89 new_file = xmalloc (len + 1 + 1);
90 memcpy (new_file, file, len);
92 new_file[len + 1] = 0;
94 lstat_result = lstat (new_file, sbuf);
101 /* This is a wrapper for @xstat@(2).
102 If FILE is the empty string, fail with errno == ENOENT.
103 Otherwise, return the result of calling the real @xstat@.
105 This works around the bug in some systems whereby @xstat@ succeeds when
106 given the zero-length file name argument. The @xstat@ from SunOS4.1.4
110 /* This function also provides a version of lstat with consistent semantics
111 when FILE specifies a symbolic link and has a trailing slash. */
115 rpl_@xstat@ (const char *file, struct stat *sbuf)
117 if (file && *file == 0)
124 return slash_aware_lstat (file, sbuf);
127 return stat (file, sbuf);