| /* Copyright (C) 1991-2014 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, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <string.h> |
| #include <unistd.h> |
| #include <hurd.h> |
| #include <hurd/paths.h> |
| #include <fcntl.h> |
| |
| /* Make a link to FROM called TO. */ |
| int |
| __symlink (from, to) |
| const char *from; |
| 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 (dir, node, name, 1); |
| |
| __mach_port_deallocate (__mach_task_self (), node); |
| } |
| |
| __mach_port_deallocate (__mach_task_self (), dir); |
| |
| if (err) |
| return __hurd_fail (err); |
| return 0; |
| } |
| |
| weak_alias (__symlink, symlink) |
