1 /***********************************************************************
2 *                                                                      *
3 *               This software is part of the ast package               *
4 *          Copyright (c) 1992-2009 AT&T Intellectual Property          *
5 *                      and is licensed under the                       *
6 *                  Common Public License, Version 1.0                  *
7 *                    by AT&T Intellectual Property                     *
8 *                                                                      *
9 *                A copy of the License is available at                 *
10 *            http://www.opensource.org/licenses/cpl1.0.txt             *
11 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12 *                                                                      *
13 *              Information and Software Systems Research               *
14 *                            AT&T Research                             *
15 *                           Florham Park NJ                            *
16 *                                                                      *
17 *                 Glenn Fowler <gsf@research.att.com>                  *
18 *                  David Korn <dgk@research.att.com>                   *
19 *                                                                      *
20 ***********************************************************************/
21 #pragma prototyped
22 /*
23  * David Korn
24  * AT&T Bell Laboratories
25  *
26  * mkfifo
27  */
28 
29 static const char usage[] =
30 "[-?\n@(#)$Id: mkfifo (AT&T Research) 2009-01-02 $\n]"
31 USAGE_LICENSE
32 "[+NAME?mkfifo - make FIFOs (named pipes)]"
33 "[+DESCRIPTION?\bmkfifo\b creates one or more FIFO's.  By "
34 	"default, the mode of created FIFO is \ba=rw\b minus the "
35 	"bits set in the \bumask\b(1).]"
36 "[m:mode]:[mode?Set the mode of created FIFO to \amode\a.  "
37 	"\amode\a is symbolic or octal mode as in \bchmod\b(1).  Relative "
38 	"modes assume an initial mode of \ba=rw\b.]"
39 "\n"
40 "\nfile ...\n"
41 "\n"
42 "[+EXIT STATUS?]{"
43         "[+0?All FIFO's created successfully.]"
44         "[+>0?One or more FIFO's could not be created.]"
45 "}"
46 "[+SEE ALSO?\bchmod\b(1), \bumask\b(1)]"
47 ;
48 
49 #include <cmd.h>
50 #include <ls.h>
51 
52 int
53 b_mkfifo(int argc, char *argv[], void* context)
54 {
55 	register char*	arg;
56 	register mode_t mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH;
57 	register mode_t	mask = 0;
58 	register int	mflag = 0;
59 
60 	cmdinit(argc, argv, context, ERROR_CATALOG, 0);
61 	for (;;)
62 	{
63 		switch (optget(argv, usage))
64 		{
65 		case 0:
66 			break;
67 		case 'm':
68 			mflag = 1;
69 			mode = strperm(arg = opt_info.arg, &opt_info.arg, mode);
70 			if (*opt_info.arg)
71 				error(ERROR_exit(0), "%s: invalid mode", arg);
72 			continue;
73 		case ':':
74 			error(2, "%s", opt_info.arg);
75 			continue;
76 		case '?':
77 			error(ERROR_usage(2), "%s", opt_info.arg);
78 			continue;
79 		}
80 		break;
81 	}
82 	argv += opt_info.index;
83 	if (error_info.errors || !*argv)
84 		error(ERROR_usage(2), "%s", optusage(NiL));
85 	mask = umask(0);
86 	if (!mflag)
87 	{
88 		mode &= ~mask;
89 		umask(mask);
90 		mask = 0;
91 	}
92 	while (arg = *argv++)
93 		if (mkfifo(arg, mode) < 0)
94 			error(ERROR_system(0), "%s:", arg);
95 	if (mask)
96 		umask(mask);
97 	return error_info.errors != 0;
98 }
99