/* Work around unlinkat bugs on Solaris 9.
- Copyright (C) 2009 Free Software Foundation, Inc.
+ Copyright (C) 2009-2010 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
#include "openat.h"
-#undef unlinkat
+#if HAVE_UNLINKAT
+
+# undef unlinkat
/* unlinkat without AT_REMOVEDIR does not honor trailing / on Solaris
9. Solve it in a similar manner to unlink. */
if (len && ISSLASH (name[len - 1]))
{
/* See the lengthy comment in unlink.c why we disobey the POSIX
- rule of letting unlink("link-to-dir/") attempt to unlink a
- directory. */
+ rule of letting unlink("link-to-dir/") attempt to unlink a
+ directory. */
struct stat st;
result = lstatat (fd, name, &st);
if (result == 0)
- {
- /* Trailing NUL will overwrite the trailing slash. */
- char *short_name = malloc (len);
- if (!short_name)
- {
- errno = EPERM;
- return -1;
- }
- memcpy (short_name, name, len);
- while (len && ISSLASH (short_name[len - 1]))
- short_name[--len] = '\0';
- if (len && (lstatat (fd, short_name, &st) || S_ISLNK (st.st_mode)))
- {
- free (short_name);
- errno = EPERM;
- return -1;
- }
- free (short_name);
- }
+ {
+ /* Trailing NUL will overwrite the trailing slash. */
+ char *short_name = malloc (len);
+ if (!short_name)
+ {
+ errno = EPERM;
+ return -1;
+ }
+ memcpy (short_name, name, len);
+ while (len && ISSLASH (short_name[len - 1]))
+ short_name[--len] = '\0';
+ if (len && (lstatat (fd, short_name, &st) || S_ISLNK (st.st_mode)))
+ {
+ free (short_name);
+ errno = EPERM;
+ return -1;
+ }
+ free (short_name);
+ }
}
if (!result)
result = unlinkat (fd, name, flag);
return result;
}
+
+#else /* !HAVE_UNLINKAT */
+
+/* Replacement for Solaris' function by the same name.
+ <http://www.google.com/search?q=unlinkat+site:docs.sun.com>
+ First, try to simulate it via (unlink|rmdir) ("/proc/self/fd/FD/FILE").
+ Failing that, simulate it via save_cwd/fchdir/(unlink|rmdir)/restore_cwd.
+ If either the save_cwd or the restore_cwd fails (relatively unlikely),
+ then give a diagnostic and exit nonzero.
+ Otherwise, this function works just like Solaris' unlinkat. */
+
+# define AT_FUNC_NAME unlinkat
+# define AT_FUNC_F1 rmdir
+# define AT_FUNC_F2 unlink
+# define AT_FUNC_USE_F1_COND AT_REMOVEDIR
+# define AT_FUNC_POST_FILE_PARAM_DECLS , int flag
+# define AT_FUNC_POST_FILE_ARGS /* empty */
+# include "at-func.c"
+# undef AT_FUNC_NAME
+# undef AT_FUNC_F1
+# undef AT_FUNC_F2
+# undef AT_FUNC_USE_F1_COND
+# undef AT_FUNC_POST_FILE_PARAM_DECLS
+# undef AT_FUNC_POST_FILE_ARGS
+
+#endif /* !HAVE_UNLINKAT */