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mkfifo.c revision 1.5 
      1 /*
      2  * Copyright (c) 1990 Regents of the University of California.
      3  * 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
     35 char copyright[] =
     36 "@(#) Copyright (c) 1990 Regents of the University of California.\n\
     37  All rights reserved.\n";
     38 #endif /* not lint */
     39 
     40 #ifndef lint
     41 /*static char sccsid[] = "from: @(#)mkfifo.c	5.3 (Berkeley) 6/1/90";*/
     42 static char rcsid[] = "$Id: mkfifo.c,v 1.5 1993/10/13 18:34:41 jtc Exp $";
     43 #endif /* not lint */
     44 
     45 #include <stdio.h>
     46 #include <stdlib.h>
     47 #include <string.h>
     48 #include <errno.h>
     49 #include <sys/types.h>
     50 #include <sys/stat.h>
     51 #include <unistd.h>
     52 
     53 static void usage();
     54 
     55 int
     56 main(argc, argv)
     57 	int argc;
     58 	char **argv;
     59 {
     60 	int ch, exitval;
     61 	void * set;
     62 	mode_t mode;
     63 
     64 	/* The default mode is the value of the bitwise inclusive or of
     65 	   S_IRUSR, S_IWUSR, S_IRGRP, S_IWGRP, S_IROTH, and S_IWOTH
     66 	   modified by the file creation mask */
     67 	mode = 0666 & ~umask(0);
     68 
     69 	while ((ch = getopt(argc, argv, "m:")) != EOF)
     70 		switch(ch) {
     71 		case 'm':
     72 			if (!(set = setmode(optarg))) {
     73 				(void)fprintf(stderr, "mkfifo: invalid file mode.\n");
     74 				exit(1);
     75 			}
     76 			/* In symbolic mode strings, the + and - operators are
     77 			   interpreted relative to an assumed initial mode of
     78 			   a=rw. */
     79 			mode = getmode (set, 0666);
     80 			break;
     81 		case '?':
     82 		default:
     83 			usage();
     84 		}
     85 
     86 	if (!*(argv += optind))
     87 		usage();
     88 
     89 	for (exitval = 0; *argv; ++argv) {
     90 		if (mkfifo(*argv, mode) < 0) {
     91 			(void)fprintf(stderr, "mkfifo: %s: %s\n",
     92 			    *argv, strerror(errno));
     93 			exitval = 1;
     94 		}
     95 	}
     96 	exit(exitval);
     97 }
     98 
     99 static void
    100 usage()
    101 {
    102 	(void)fprintf(stderr, "usage: mkfifo [-m mode] fifoname ...\n");
    103 	exit(1);
    104 }
    105