/* Work around a bug of lstat on some systems
- Copyright (C) 1997-1999, 2000-2006, 2008 Free Software Foundation, Inc.
+ Copyright (C) 1997-2006, 2008-2012 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
/* written by Jim Meyering */
+/* If the user's config.h happens to include <sys/stat.h>, let it include only
+ the system's <sys/stat.h> here, so that orig_lstat doesn't recurse to
+ rpl_lstat. */
+#define __need_system_sys_stat_h
#include <config.h>
-/* Get the original definition of open. It might be defined as a macro. */
-#define __need_system_sys_stat_h
-#include <sys/types.h>
-#include <sys/stat.h>
-#undef __need_system_sys_stat_h
+#if !HAVE_LSTAT
+/* On systems that lack symlinks, our replacement <sys/stat.h> already
+ defined lstat as stat, so there is nothing further to do other than
+ avoid an empty file. */
+typedef int dummy;
+#else /* HAVE_LSTAT */
+
+/* Get the original definition of lstat. It might be defined as a macro. */
+# include <sys/types.h>
+# include <sys/stat.h>
+# undef __need_system_sys_stat_h
static inline int
orig_lstat (const char *filename, struct stat *buf)
}
/* Specification. */
-#include <sys/stat.h>
+/* Write "sys/stat.h" here, not <sys/stat.h>, otherwise OSF/1 5.1 DTK cc
+ eliminates this include because of the preliminary #include <sys/stat.h>
+ above. */
+# include "sys/stat.h"
-#include <string.h>
-#include <errno.h>
+# include <string.h>
+# include <errno.h>
/* lstat works differently on Linux and Solaris systems. POSIX (see
- `pathname resolution' in the glossary) requires that programs like
- `ls' take into consideration the fact that FILE has a trailing slash
+ "pathname resolution" in the glossary) requires that programs like
+ 'ls' take into consideration the fact that FILE has a trailing slash
when FILE is a symbolic link. On Linux and Solaris 10 systems, the
lstat function already has the desired semantics (in treating
- `lstat ("symlink/", sbuf)' just like `lstat ("symlink/.", sbuf)',
+ 'lstat ("symlink/", sbuf)' just like 'lstat ("symlink/.", sbuf)',
but on Solaris 9 and earlier it does not.
If FILE has a trailing slash and specifies a symbolic link,
size_t len;
int lstat_result = orig_lstat (file, sbuf);
- if (lstat_result != 0 || !S_ISLNK (sbuf->st_mode))
+ if (lstat_result != 0)
return lstat_result;
+ /* This replacement file can blindly check against '/' rather than
+ using the ISSLASH macro, because all platforms with '\\' either
+ lack symlinks (mingw) or have working lstat (cygwin) and thus do
+ not compile this file. 0 len should have already been filtered
+ out above, with a failure return of ENOENT. */
len = strlen (file);
- if (len == 0 || file[len - 1] != '/')
- return 0;
-
- /* FILE refers to a symbolic link and the name ends with a slash.
- Call stat() to get info about the link's referent. */
-
- /* If stat fails, then we do the same. */
- if (stat (file, sbuf) != 0)
- return -1;
-
- /* If FILE references a directory, return 0. */
- if (S_ISDIR (sbuf->st_mode))
+ if (file[len - 1] != '/' || S_ISDIR (sbuf->st_mode))
return 0;
- /* Here, we know stat succeeded and FILE references a non-directory.
- But it was specified via a name including a trailing slash.
- Fail with errno set to ENOTDIR to indicate the contradiction. */
- errno = ENOTDIR;
- return -1;
+ /* At this point, a trailing slash is only permitted on
+ symlink-to-dir; but it should have found information on the
+ directory, not the symlink. Call stat() to get info about the
+ link's referent. Our replacement stat guarantees valid results,
+ even if the symlink is not pointing to a directory. */
+ if (!S_ISLNK (sbuf->st_mode))
+ {
+ errno = ENOTDIR;
+ return -1;
+ }
+ return stat (file, sbuf);
}
+
+#endif /* HAVE_LSTAT */