1 files changed, 74 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/symlinkat.c b/sysdeps/mach/hurd/symlinkat.c
new file mode 100644
index 0000000000..9a51c66d8d
--- /dev/null
+++ b/sysdeps/mach/hurd/symlinkat.c
@@ -0,0 +1,74 @@
+/* Create a symbolic link named relative to an open directory.  Hurd version.
+   Copyright (C) 1991,1992,1993,1994,1995,1996,1997,2006
+	Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <hurd.h>
+#include <hurd/paths.h>
+#include <hurd/fd.h>
+#include <string.h>
+
+
+/* Make a link to FROM called TO relative to FD.  */
+int
+symlinkat (from, fd, to)
+     const char *from;
+     int fd;
+     const char *to;
+{
+  error_t err;
+  file_t dir, node;
+  char *name;
+  const size_t len = strlen (from) + 1;
+  char buf[sizeof (_HURD_SYMLINK) + len];
+
+  /* A symlink is a file whose translator is "/hurd/symlink\0target\0".  */
+
+  memcpy (buf, _HURD_SYMLINK, sizeof (_HURD_SYMLINK));
+  memcpy (&buf[sizeof (_HURD_SYMLINK)], from, len);
+
+  dir = __file_name_split_at (fd, to, &name);
+  if (dir == MACH_PORT_NULL)
+    return -1;
+
+  /* Create a new, unlinked node in the target directory.  */
+  err = __dir_mkfile (dir, O_WRITE, 0777 & ~_hurd_umask, &node);
+
+  if (! err)
+    /* Set the node's translator to make it a symlink.  */
+    err = __file_set_translator (node,
+				 FS_TRANS_EXCL|FS_TRANS_SET,
+				 FS_TRANS_EXCL|FS_TRANS_SET, 0,
+				 buf, sizeof (_HURD_SYMLINK) + len,
+				 MACH_PORT_NULL, MACH_MSG_TYPE_COPY_SEND);
+
+  if (! err)
+    /* Link the node, now a valid symlink, into the target directory.  */
+    err = __dir_link (dir, node, name, 1);
+
+  __mach_port_deallocate (__mach_task_self (), dir);
+  __mach_port_deallocate (__mach_task_self (), node);
+
+  if (err)
+    return __hurd_fail (err);
+  return 0;
+}