diff options
Diffstat (limited to 'REORG.TODO/sysdeps/mach/hurd/symlink.c')
-rw-r--r-- | REORG.TODO/sysdeps/mach/hurd/symlink.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/mach/hurd/symlink.c b/REORG.TODO/sysdeps/mach/hurd/symlink.c new file mode 100644 index 0000000000..d5c768b89b --- /dev/null +++ b/REORG.TODO/sysdeps/mach/hurd/symlink.c @@ -0,0 +1,69 @@ +/* Copyright (C) 1991-2017 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 (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) |