From 0ecb606cb6cf65de1d9fc8a919bceb4be476c602 Mon Sep 17 00:00:00 2001 From: Jakub Jelinek Date: Thu, 12 Jul 2007 18:26:36 +0000 Subject: 2.5-18.1 --- sysdeps/mach/hurd/symlinkat.c | 74 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+) create mode 100644 sysdeps/mach/hurd/symlinkat.c (limited to 'sysdeps/mach/hurd/symlinkat.c') diff --git a/sysdeps/mach/hurd/symlinkat.c b/sysdeps/mach/hurd/symlinkat.c new file mode 100644 index 0000000000..9a51c66d8d --- /dev/null +++ b/sysdeps/mach/hurd/symlinkat.c @@ -0,0 +1,74 @@ +/* Create a symbolic link named relative to an open directory. Hurd version. + Copyright (C) 1991,1992,1993,1994,1995,1996,1997,2006 + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include +#include +#include +#include +#include +#include +#include + + +/* Make a link to FROM called TO relative to FD. */ +int +symlinkat (from, fd, to) + const char *from; + int fd; + 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_at (fd, 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 (), dir); + __mach_port_deallocate (__mach_task_self (), node); + + if (err) + return __hurd_fail (err); + return 0; +} -- cgit 1.4.1