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, 1 insertions, 41 deletions

diff --git a/sysdeps/mach/hurd/readlink.c b/sysdeps/mach/hurd/readlink.c
index 34f132cb92..ddad3d2919 100644
--- a/sysdeps/mach/hurd/readlink.c
+++ b/sysdeps/mach/hurd/readlink.c
@@ -27,46 +27,6 @@
 ssize_t
 __readlink (const char *file_name, char *buf, size_t len)
 {
-  error_t err;
-  file_t file_stat;
-  struct stat64 st;
-
-  file_stat = __file_name_lookup (file_name, O_NOLINK, 0);
-  if (file_stat == MACH_PORT_NULL)
-    return -1;
-
-  err = __io_stat (file_stat, &st);
-  if (! err)
-    if (S_ISLNK (st.st_mode))
-      {
-	enum retry_type doretry;
-	char retryname[1024];
-	file_t file;
-	char *rbuf = buf;
-
-	err = __dir_lookup (file_stat, "", O_READ | O_NOLINK, 0, &doretry, retryname, &file);
-	if (! err && (doretry != FS_RETRY_NORMAL || retryname[0] != '\0'))
-	  err = EGRATUITOUS;
-	if (! err)
-	  {
-	    err = __io_read (file, &rbuf, &len, 0, len);
-	    if (!err && rbuf != buf)
-	      {
-		memcpy (buf, rbuf, len);
-		__vm_deallocate (__mach_task_self (), (vm_address_t)rbuf, len);
-	      }
-
-	    __mach_port_deallocate (__mach_task_self (), file);
-	  }
-      }
-    else
-      err = EINVAL;
-
-  __mach_port_deallocate (__mach_task_self (), file_stat);
-
-  if (err)
-    return __hurd_fail (err);
-  else
-    return len;
+  return __readlinkat (AT_FDCWD, file_name, buf, len);
 }
 weak_alias (__readlink, readlink)