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authorJakub Jelinek <jakub@redhat.com>2007-07-12 18:26:36 +0000
committerJakub Jelinek <jakub@redhat.com>2007-07-12 18:26:36 +0000
commit0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (patch)
tree2ea1f8305970753e4a657acb2ccc15ca3eec8e2c /sysdeps/mach/hurd/linkat.c
parent7d58530341304d403a6626d7f7a1913165fe2f32 (diff)
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2.5-18.1
Diffstat (limited to 'sysdeps/mach/hurd/linkat.c')
-rw-r--r--sysdeps/mach/hurd/linkat.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/linkat.c b/sysdeps/mach/hurd/linkat.c
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+++ b/sysdeps/mach/hurd/linkat.c
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+/* Make a link between file names relative to open directories.  Hurd version.
+   Copyright (C) 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 <errno.h>
+#include <fcntl.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <hurd.h>
+#include <hurd/fd.h>
+
+
+/* Make a link to FROM relative to FROMFD called TO relative to TOFD.  */
+int
+linkat (fromfd, from, tofd, to, flags)
+     int fromfd;
+     const char *from;
+     int tofd;
+     const char *to;
+     int flags;
+{
+  error_t err;
+  file_t oldfile, linknode, todir;
+  char *toname;
+
+  oldfile = __file_name_lookup_at (fromfd, flags, from, 0, 0);
+  if (oldfile == MACH_PORT_NULL)
+    return -1;
+
+  /* The file_getlinknode RPC returns the port that should be passed to
+     the receiving filesystem (the one containing TODIR) in dir_link.  */
+
+  err = __file_getlinknode (oldfile, &linknode);
+  __mach_port_deallocate (__mach_task_self (), oldfile);
+  if (err)
+    return __hurd_fail (err);
+
+  todir = __file_name_split_at (tofd, to, &toname);
+  if (todir != MACH_PORT_NULL)
+    {
+      err = __dir_link (todir, linknode, toname, 1);
+      __mach_port_deallocate (__mach_task_self (), todir);
+    }
+  __mach_port_deallocate (__mach_task_self (), linknode);
+  if (todir == MACH_PORT_NULL)
+    return -1;
+
+  if (err)
+    return __hurd_fail (err);
+  return 0;
+}