string.h is ANSI C include file

[unix-history] / usr / src / usr.bin / mkfifo / mkfifo.c

/*
* Copyright (c) 1990 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley.  The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1990 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)mkfifo.c    5.2 (Berkeley) %G%";
#endif /* not lint */

#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>

main(argc, argv)
       int argc;
       char **argv;
{
       extern int errno, optind;
       int ch, exitval, pflag;

       pflag = 0;
       while ((ch = getopt(argc, argv, "p")) != EOF)
               switch(ch) {
               case 'p':
                       pflag = 1;
                       break;
               case '?':
               default:
                       usage();
               }

       if (!*(argv += optind))
               usage();

       for (exitval = 0; *argv; ++argv) {
               if (pflag && build(*argv)) {
                       exitval |= 1;
                       continue;
               }
               if (mkfifo(*argv, 0777) < 0) {
                       (void)fprintf(stderr, "mkfifo: %s: %s\n",
                           *argv, strerror(errno));
                       exitval |= 1;
               }
       }
       exit(exitval);
}

build(path)
       char *path;
{
       register char *p;
       struct stat sb;

       for (p = path; *p; p++) {
               if (*p  != '/')
                       continue;
               if (stat(path, &sb)) {
                       if (errno != ENOENT || mkdir(path, 0777) < 0) {
                               (void)fprintf(stderr, "mkdir: %s: %s\n",
                                   path, strerror(errno));
                               return(1);
                       }
               }
               *p = '/';
       }
       return(0);
}

usage()
{
       (void)fprintf(stderr, "usage: mkfifo [-p] fifoname ...\n");
       exit(1);
}