1 /* Create a named fifo relative to an open directory.
2 Copyright (C) 2009 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* written by Eric Blake */
23 #include "dirname.h" /* solely for definition of IS_ABSOLUTE_FILE_NAME */
25 #include "openat-priv.h"
29 # define HAVE_MKFIFO 0
35 /* For now, all known systems either have both mkfifo and mknod, or
36 neither. If this is not true, we can implement the portable
37 aspects of one using the other (POSIX only requires mknod to create
38 fifos; all other uses of mknod are for root users and outside the
40 #if HAVE_MKNOD != HAVE_MKFIFO
41 # error Please report this message and your system to bug-gnulib@gnu.org.
45 /* Mingw lacks mkfifo and mknod, so this wrapper is trivial. */
50 mkfifoat (int fd _UNUSED_PARAMETER_, char const *path _UNUSED_PARAMETER_,
51 mode_t mode _UNUSED_PARAMETER_)
58 mknodat (int fd _UNUSED_PARAMETER_, char const *path _UNUSED_PARAMETER_,
59 mode_t mode _UNUSED_PARAMETER_, dev_t dev _UNUSED_PARAMETER_)
65 #else /* HAVE_MKFIFO */
67 /* Create a named fifo FILE relative to directory FD, with access
68 permissions in MODE. If possible, do it without changing the
69 working directory. Otherwise, resort to using save_cwd/fchdir,
70 then mkfifo/restore_cwd. If either the save_cwd or the restore_cwd
71 fails, then give a diagnostic and exit nonzero. */
73 # define AT_FUNC_NAME mkfifoat
74 # define AT_FUNC_F1 mkfifo
75 # define AT_FUNC_POST_FILE_PARAM_DECLS , mode_t mode
76 # define AT_FUNC_POST_FILE_ARGS , mode
80 # undef AT_FUNC_POST_FILE_PARAM_DECLS
81 # undef AT_FUNC_POST_FILE_ARGS
83 /* Create a file system node FILE relative to directory FD, with
84 access permissions and file type in MODE, and device type in DEV.
85 Usually, non-root applications can only create named fifos, with
86 DEV set to 0. If possible, create the node without changing the
87 working directory. Otherwise, resort to using save_cwd/fchdir,
88 then mknod/restore_cwd. If either the save_cwd or the restore_cwd
89 fails, then give a diagnostic and exit nonzero. */
91 # define AT_FUNC_NAME mknodat
92 # define AT_FUNC_F1 mknod
93 # define AT_FUNC_POST_FILE_PARAM_DECLS , mode_t mode, dev_t dev
94 # define AT_FUNC_POST_FILE_ARGS , mode, dev
98 # undef AT_FUNC_POST_FILE_PARAM_DECLS
99 # undef AT_FUNC_POST_FILE_ARGS
101 #endif /* HAVE_MKFIFO */