hurd: Factorize at/non-at functions

Non-at functions can be implemented by just calling the corresponding at
function with AT_FDCWD and zero at_flags.

In the linkat case, the at behavior is different (O_NOLINK), so this introduces
__linkat_common to pass O_NOLINK as appropriate.

lstat functions can also be implemented with fstatat by adding
__fstatat64_common which takes a flags parameter in addition to the at_flags
parameter,

In the end this factorizes chmod, chown, link, lstat64, mkdir, readlink,
rename, stat64, symlink, unlink, utimes.

This also makes __lstat, __lxstat64, __stat and __xstat64 directly use
__fstatat64_common instead of __lstat64 or __stat64.

1 files changed, 3 insertions, 29 deletions

diff --git a/sysdeps/mach/hurd/link.c b/sysdeps/mach/hurd/link.c
index 48856bdce9..2267ae0732 100644
--- a/sysdeps/mach/hurd/link.c
+++ b/sysdeps/mach/hurd/link.c
@@ -20,39 +20,13 @@
 #include <unistd.h>
 #include <hurd.h>
 
+#include <linkat_common.h>
+
 /* Make a link to FROM called TO.  */
 int
 __link (const char *from, const char *to)
 {
-  error_t err;
-  file_t oldfile, linknode, todir;
-  char *toname;
-
-  oldfile = __file_name_lookup (from, 0, 0);
-  if (oldfile == MACH_PORT_NULL)
-    return -1;
-
-  /* The file_getlinknode RPC returns the port that should be passed to
-     the receiving filesystem (the one containing TODIR) in dir_link.  */
-
-  err = __file_getlinknode (oldfile, &linknode);
-  __mach_port_deallocate (__mach_task_self (), oldfile);
-  if (err)
-    return __hurd_fail (err);
-
-  todir = __file_name_split (to, &toname);
-  if (todir != MACH_PORT_NULL)
-    {
-      err = __dir_link (todir, linknode, toname, 1);
-      __mach_port_deallocate (__mach_task_self (), todir);
-    }
-  __mach_port_deallocate (__mach_task_self (), linknode);
-  if (todir == MACH_PORT_NULL)
-    return -1;
-
-  if (err)
-    return __hurd_fail (err);
-  return 0;
+  return __linkat_common (AT_FDCWD, from, AT_FDCWD, to, 0, 0);
 }
 
 weak_alias (__link, link)