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- /* Copyright (C) 1991, 1992, 1993, 1994 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;
- }
-