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Diffstat (limited to 'sysdeps/mach/hurd/symlink.c')
-rw-r--r--sysdeps/mach/hurd/symlink.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/symlink.c b/sysdeps/mach/hurd/symlink.c
new file mode 100644
index 0000000000..5e67c4e452
--- /dev/null
+++ b/sysdeps/mach/hurd/symlink.c
@@ -0,0 +1,68 @@
+/* Copyright (C) 1991, 1992, 1993, 1994, 1995 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <ansidecl.h>
+#include <string.h>
+#include <unistd.h>
+#include <hurd.h>
+#include <hurd/paths.h>
+#include <fcntl.h>
+
+/* Make a link to FROM called TO. */
+int
+DEFUN(__symlink, (from, to), CONST char *from AND 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 (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 (node, dir, name);
+
+ __mach_port_deallocate (__mach_task_self (), dir);
+ __mach_port_deallocate (__mach_task_self (), node);
+
+ if (err)
+ return __hurd_fail (err);
+ return 0;
+}
+
+weak_alias (__symlink, symlink)