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mkfifo.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*                  Copyright (c) 1992-2006 AT&T Corp.                  *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                            by AT&T Corp.                             *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                  David Korn <dgk@research.att.com>                   *
*                                                                      *
***********************************************************************/
#pragma prototyped
/*
 * David Korn
 * AT&T Bell Laboratories
 *
 * mkfifo
 */


static const char usage[] =
"[-?\n@(#)$Id: mkfifo (AT&T Labs Research) 1999-04-20 $\n]"
USAGE_LICENSE
"[+NAME?mkfifo - make FIFOs (named pipes)]"
"[+DESCRIPTION?\bmkfifo\b creates one or more FIFO's.  By "
      "default, the mode of created FIFO is \ba=rw\b minus the "
      "bits set in the \bumask\b(1).]"
"[m:mode]:[mode?Set the mode of created FIFO to \amode\a.  "
      "\amode\a is symbolic or octal mode as in \bchmod\b(1).  Relative "
      "modes assume an initial mode of \ba=rw\b.]"
"\n"
"\nfile ...\n"
"\n"
"[+EXIT STATUS?]{"
        "[+0?All FIFO's created successfully.]"
        "[+>0?One or more FIFO's could not be created.]"
"}"
"[+SEE ALSO?\bchmod\b(1), \bumask\b(1)]"
;

#include <cmdlib.h>
#include <ls.h>

#define RWALL     (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)

int
b_mkfifo(int argc, char *argv[], void* context)
{
      register char *arg;
      register mode_t mode=RWALL, mask=0;
      register int n;

      NoP(argc);
      cmdinit(argv, context, ERROR_CATALOG, 0);
      while (n = optget(argv, usage)) switch (n)
      {
        case 'm':
            mode = strperm(arg=opt_info.arg,&opt_info.arg,mode);
            if(*opt_info.arg)
                  error(ERROR_exit(0),"%s: invalid mode",arg);
            break;
        case ':':
            error(2, "%s",opt_info.arg);
            break;
        case '?':
            error(ERROR_usage(2), "%s",opt_info.arg);
            break;
      }
      argv += opt_info.index;
      if(error_info.errors || !*argv)
            error(ERROR_usage(2),"%s",optusage(NiL));
      while(arg = *argv++)
      {
            if(mkfifo(arg,mode) < 0)
                  error(ERROR_system(0),"%s:",arg);
      }
      if(mask)
            umask(mask);
      return(error_info.errors!=0);
}


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