mkfifo.c revision 50452 
1/*
2 * Copyright (c) 1990, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static const char copyright[] =
36"@(#) Copyright (c) 1990, 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)mkfifo.c	8.2 (Berkeley) 1/5/94";
43#endif
44static const char rcsid[] =
45	"$Id: mkfifo.c,v 1.3 1997/07/24 07:02:55 charnier Exp $";
46#endif /* not lint */
47
48#include <sys/types.h>
49#include <sys/stat.h>
50
51#include <err.h>
52#include <errno.h>
53#include <stdio.h>
54#include <string.h>
55#include <unistd.h>
56
57#define	BASEMODE	S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | \
58			S_IROTH | S_IWOTH
59
60static void usage __P((void));
61
62static int f_mode;
63
64int
65main(argc, argv)
66	int argc;
67	char *argv[];
68{
69	char *modestr;
70	void *modep;
71	mode_t fifomode;
72	int ch, exitval;
73
74	while ((ch = getopt(argc, argv, "m:")) != -1)
75		switch(ch) {
76		case 'm':
77			f_mode = 1;
78			modestr = optarg;
79			break;
80		case '?':
81		default:
82			usage();
83		}
84	argc -= optind;
85	argv += optind;
86	if (argv[0] == NULL)
87		usage();
88
89	if (f_mode) {
90		umask(0);
91		errno = 0;
92		if ((modep = setmode(modestr)) == NULL) {
93			if (errno)
94				err(1, "setmode");
95			errx(1, "invalid file mode: %s", modestr);
96		}
97		fifomode = getmode(modep, BASEMODE);
98	} else {
99		fifomode = BASEMODE;
100	}
101
102	for (exitval = 0; *argv != NULL; ++argv)
103		if (mkfifo(*argv, fifomode) < 0) {
104			warn("%s", *argv);
105			exitval = 1;
106		}
107	exit(exitval);
108}
109
110static void
111usage()
112{
113	(void)fprintf(stderr, "usage: mkfifo [-m mode] fifo_name ...\n");
114	exit(1);
115}
116