Back to index

glibc  2.9
openat.c
Go to the documentation of this file.
00001 /* openat -- Open a file named relative to an open directory.  Hurd version.
00002    Copyright (C) 2006 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <errno.h>
00021 #include <fcntl.h>
00022 #include <stdarg.h>
00023 #include <stddef.h>
00024 #include <stdio.h>
00025 #include <sys/stat.h>
00026 #include <hurd.h>
00027 #include <hurd/fd.h>
00028 
00029 /* Open FILE with access OFLAG.  Interpret relative paths relative to
00030    the directory associated with FD.  If OFLAG includes O_CREAT, a
00031    third argument is the file protection.  */
00032 int
00033 __openat (fd, file, oflag)
00034      int fd;
00035      const char *file;
00036      int oflag;
00037 {
00038   int mode;
00039   io_t port;
00040 
00041   if (oflag & O_CREAT)
00042     {
00043       va_list arg;
00044       va_start (arg, oflag);
00045       mode = va_arg (arg, int);
00046       va_end (arg);
00047     }
00048   else
00049     mode = 0;
00050 
00051   port = __file_name_lookup_at (fd, 0, file, oflag, mode);
00052   if (port == MACH_PORT_NULL)
00053     return -1;
00054 
00055   return _hurd_intern_fd (port, oflag, 1);
00056 }
00057 libc_hidden_def (__openat)
00058 weak_alias (__openat, openat)
00059 
00060 int
00061 __openat_2 (fd, file, oflag)
00062      int fd;
00063      const char *file;
00064      int oflag;
00065 {
00066   if (oflag & O_CREAT)
00067     __fortify_fail ("invalid openat call: O_CREAT without mode");
00068 
00069   return __openat (fd, file, oflag);
00070 }
00071 
00072 /* openat64 is just the same as openat for us.  */
00073 weak_alias (__openat, __openat64)
00074 libc_hidden_weak (__openat64)
00075 weak_alias (__openat, openat64)
00076 strong_alias (__openat_2, __openat64_2)