githubmirror/initscripts

src/usleep.c
97 строк3 KB
David Kaspar [Dee'Kej]
consoletype/genhostid/usleep: allow disabling of deprecation warnings
03 авг 2018, 14:06
03 авг 2018, 14:065936dda
/* 
 * usleep
 * 
 * Written by Donald Barnes <djb@redhat.com> for Red Hat, Inc.
 * 
 * Copyright (c) 1997-2003 Red Hat, Inc. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 */


#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>

#include "popt.h"

int main(const int argc, const char **argv) {
  unsigned long count;
  poptContext optCon;
  int showVersion = 0;
  int showOot = 0;
  int rc;
  const char * countStr = NULL;
  struct poptOption options[] = {
            { "version", 'v', POPT_ARG_NONE, &showVersion, 0, 
			"Display the version of this program, and exit" },
            { "oot", 'o', POPT_ARG_NONE, &showOot, 0, 
			"oot says hey!" },
	    POPT_AUTOHELP
            { 0, 0, 0, 0, 0 }
        };

  optCon = poptGetContext("usleep", argc, argv, options,0);
  /*poptReadDefaultConfig(optCon, 1);*/
  poptSetOtherOptionHelp(optCon, "[microseconds]");

  if ((rc = poptGetNextOpt(optCon)) < -1) {
	fprintf(stderr, "usleep: bad argument %s: %s\n", 
		poptBadOption(optCon, POPT_BADOPTION_NOALIAS), 
		poptStrerror(rc));
	return 2;
  }

  if (showVersion) {
      printf("usleep version 1.2\n	usleep --help for more info\n");
      return 0;
  }

  if (showOot) {
      printf("oot says hey!\n");
      return 0;
  }

  countStr = poptGetArg(optCon);

  if (countStr == NULL) count = 1;

  else if (countStr && poptGetArg(optCon)) {
      fprintf(stderr, "%s: exactly one argument (number of microseconds) "
      		"must be used\n", argv[0]);
      return 2;
  }

  else count = strtoul(countStr, NULL, 0); 

  errno = 0;

  /*
   * access() returns -1 if the file does not exist or upon error.
   * We should display the deprecation warning only when we are sure the
   * file does not exist. In case of different error, silently ignore it
   * and do not print anything - to not pollute users' scripts unnecessarily.
   */
  if (access("/etc/sysconfig/disable-deprecation-warnings", F_OK) == -1
      && errno == ENOENT) {
    fprintf(stderr, "warning: usleep is deprecated, and will be removed in near future!\n"
                    "warning: use \"sleep %.7g\" instead...\n", count / 1e6);
  }

  usleep(count);
  return 0;
}