projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 28f540f4 RM |
1 | /* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. | |
| 3 | ||
| 4 | The GNU C Library is free software; you can redistribute it and/or | |
| 5 | modify it under the terms of the GNU Library General Public License as | |
| 6 | published by the Free Software Foundation; either version 2 of the | |
| 7 | License, or (at your option) any later version. | |
| 8 | ||
| 9 | The GNU C Library is distributed in the hope that it will be useful, | |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | Library General Public License for more details. | |
| 13 | ||
| 14 | You should have received a copy of the GNU Library General Public | |
| 15 | License along with the GNU C Library; see the file COPYING.LIB. If | |
| 16 | not, write to the Free Software Foundation, Inc., 675 Mass Ave, | |
| 17 | Cambridge, MA 02139, USA. */ | |
| 18 | ||
| 19 | #include <ansidecl.h> | |
| 20 | #include <string.h> | |
| 21 | #include <unistd.h> | |
| 22 | #include <hurd.h> | |
| 23 | #include <hurd/paths.h> | |
| 24 | #include <fcntl.h> | |
| 25 | ||
| 26 | /* Make a link to FROM called TO. */ | |
| 27 | int | |
| 28 | DEFUN(__symlink, (from, to), CONST char *from AND CONST char *to) | |
| 29 | { | |
| 30 | error_t err; | |
| 31 | file_t dir, node; | |
| 32 | char *name; | |
| 33 | const size_t len = strlen (from) + 1; | |
| 34 | char buf[sizeof (_HURD_SYMLINK) + len]; | |
| 35 | ||
| 36 | /* A symlink is a file whose translator is "/hurd/symlink\0target\0". */ | |
| 37 | ||
| 38 | memcpy (buf, _HURD_SYMLINK, sizeof (_HURD_SYMLINK)); | |
| 39 | memcpy (&buf[sizeof (_HURD_SYMLINK)], from, len); | |
| 40 | ||
| 41 | dir = __file_name_split (to, &name); | |
| 42 | if (dir == MACH_PORT_NULL) | |
| 43 | return -1; | |
| 44 | ||
| 45 | /* Create a new, unlinked node in the target directory. */ | |
| 46 | err = __dir_mkfile (dir, O_WRITE, 0777 & ~_hurd_umask, &node); | |
| 47 | ||
| 48 | if (! err) | |
| 49 | /* Set the node's translator to make it a symlink. */ | |
| 50 | err = __file_set_translator (node, | |
| 51 | FS_TRANS_EXCL|FS_TRANS_SET, | |
| 52 | FS_TRANS_EXCL|FS_TRANS_SET, 0, | |
| 53 | buf, sizeof (_HURD_SYMLINK) + len, | |
| 54 | MACH_PORT_NULL, MACH_MSG_TYPE_COPY_SEND); | |
| 55 | ||
| 56 | if (! err) | |
| 57 | /* Link the node, now a valid symlink, into the target directory. */ | |
| 58 | err = __dir_link (node, dir, name); | |
| 59 | ||
| 60 | __mach_port_deallocate (__mach_task_self (), dir); | |
| 61 | __mach_port_deallocate (__mach_task_self (), node); | |
| 62 | ||
| 63 | if (err) | |
| 64 | return __hurd_fail (err); | |
| 65 | return 0; | |
| 66 | } | |
| 67 | ||
| 68 | weak_alias (__symlink, symlink) |