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glibc  2.9
xmknodat.c
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00001 /* Copyright (C) 2005 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <errno.h>
00020 #include <fcntl.h>
00021 #include <stddef.h>
00022 #include <sys/types.h>
00023 #include <sys/stat.h>
00024 
00025 /* Create a device file named PATH relative to FD, with permission and
00026    special bits MODE and device number DEV (which can be constructed
00027    from major and minor device numbers with the `makedev' macro
00028    above).  */
00029 int
00030 __xmknodat (int vers, int fd, const char *path, mode_t mode, dev_t *dev)
00031 {
00032   if (vers != _MKNOD_VER)
00033     {
00034       __set_errno (EINVAL);
00035       return -1;
00036     }
00037 
00038   if (path == NULL)
00039     {
00040       __set_errno (EINVAL);
00041       return -1;
00042     }
00043 
00044   if (fd != AT_FDCWD && path[0] != '/')
00045     {
00046       /* Check FD is associated with a directory.  */
00047       struct stat64 st;
00048       if (__fxstat64 (_STAT_VER, fd, &st) != 0)
00049        return -1;
00050 
00051       if (!S_ISDIR (st.st_mode))
00052        {
00053          __set_errno (ENOTDIR);
00054          return -1;
00055        }
00056     }
00057 
00058   __set_errno (ENOSYS);
00059   return -1;
00060 }
00061 stub_warning (__xmknodat)
00062 
00063 libc_hidden_def (__xmknodat)
00064 #include <stub-tag.h>