IABSD.fr/src/usr.bin/biff/biff.c

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• Author : cheloha
  Date : 2022-12-04 23:50:45
  Hash : d7259957
  Message : userspace: remove vestigial '?' cases from top-level getopt(3) loops getopt(3) returns '?' when it encounters a flag not present in the in the optstring or if a flag is missing its option argument. We can handle this case with the "default" failure case with no loss of legibility. Hence, remove all the redundant "case '?':" lines. Prompted by dlg@. With help from dlg@ and millert@. Link: https://marc.info/?l=openbsd-tech&m=167011979726449&w=2 ok naddy@ millert@ dlg@

• usr.bin/biff/biff.c

• /*	$OpenBSD: biff.c,v 1.19 2022/12/04 23:50:47 cheloha Exp $	*/
  /*	$NetBSD: biff.c,v 1.3 1995/03/26 02:34:22 glass Exp $	*/
  
  /*
   * Copyright (c) 1980, 1993
   *	The Regents of the University of California.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   */
  
  #include <sys/types.h>
  #include <sys/stat.h>
  
  #include <err.h>
  #include <errno.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <unistd.h>
  
  static void usage(void);
  
  int
  main(int argc, char *argv[])
  {
  	struct stat sb;
  	int ch;
  	char *name;
  
  	while ((ch = getopt(argc, argv, "")) != -1)
  		switch(ch) {
  		default:
  			usage();
  		}
  	argc -= optind;
  	argv += optind;
  
  	if ((name = ttyname(STDERR_FILENO)) == NULL)
  		err(2, "tty");
  
  	if (unveil(name, "rw") == -1)
  		err(2, "unveil %s", name);
  	if (pledge("stdio rpath fattr", NULL) == -1)
  		err(2, "pledge");
  
  	if (stat(name, &sb))
  		err(2, "stat");
  
  	sb.st_mode &= ACCESSPERMS;
  
  	if (*argv == NULL) {
  		(void)printf("is %s\n", sb.st_mode & S_IXUSR ? "y" : "n");
  		exit(sb.st_mode & S_IXUSR ? 0 : 1);
  	}
  
  	switch(argv[0][0]) {
  	case 'n':
  		if (chmod(name, sb.st_mode & ~S_IXUSR) == -1)
  			err(2, "%s", name);
  		break;
  	case 'y':
  		if (chmod(name, sb.st_mode | S_IXUSR) == -1)
  			err(2, "%s", name);
  		break;
  	default:
  		usage();
  	}
  	exit(sb.st_mode & S_IXUSR ? 0 : 1);
  }
  
  static void
  usage(void)
  {
  	(void)fprintf(stderr, "usage: biff [n | y]\n");
  	exit(2);
  }