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Annotation of src/usr.bin/biff/biff.c, Revision 1.11

1.11    ! deraadt     1: /*     $OpenBSD: biff.c,v 1.10 2007/02/20 13:41:19 jmc Exp $   */
1.1       deraadt     2: /*     $NetBSD: biff.c,v 1.3 1995/03/26 02:34:22 glass Exp $   */
                      3:
                      4: /*
                      5:  * Copyright (c) 1980, 1993
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
1.8       millert    16:  * 3. Neither the name of the University nor the names of its contributors
1.1       deraadt    17:  *    may be used to endorse or promote products derived from this software
                     18:  *    without specific prior written permission.
                     19:  *
                     20:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     21:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     22:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     23:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     24:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     25:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     26:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     27:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     28:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     29:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     30:  * SUCH DAMAGE.
                     31:  */
                     32:
                     33: #include <sys/types.h>
                     34: #include <sys/stat.h>
                     35:
                     36: #include <err.h>
                     37: #include <errno.h>
                     38: #include <stdio.h>
                     39: #include <stdlib.h>
                     40: #include <string.h>
                     41: #include <unistd.h>
                     42:
1.7       millert    43: static void usage(void);
1.1       deraadt    44:
1.5       deraadt    45: int
1.9       deraadt    46: main(int argc, char *argv[])
1.1       deraadt    47: {
                     48:        struct stat sb;
                     49:        int ch;
                     50:        char *name;
                     51:
                     52:
1.3       millert    53:        while ((ch = getopt(argc, argv, "")) != -1)
1.1       deraadt    54:                switch(ch) {
                     55:                case '?':
                     56:                default:
                     57:                        usage();
                     58:                }
                     59:        argc -= optind;
                     60:        argv += optind;
                     61:
                     62:        if ((name = ttyname(STDERR_FILENO)) == NULL)
                     63:                err(2, "tty");
                     64:
                     65:        if (stat(name, &sb))
                     66:                err(2, "stat");
                     67:
                     68:        if (*argv == NULL) {
1.4       deraadt    69:                (void)printf("is %s\n", sb.st_mode & S_IXUSR ? "y" : "n");
                     70:                exit(sb.st_mode & S_IXUSR ? 0 : 1);
1.1       deraadt    71:        }
                     72:
                     73:        switch(argv[0][0]) {
                     74:        case 'n':
1.4       deraadt    75:                if (chmod(name, sb.st_mode & ~S_IXUSR) < 0)
1.6       millert    76:                        err(2, "%s", name);
1.1       deraadt    77:                break;
                     78:        case 'y':
1.4       deraadt    79:                if (chmod(name, sb.st_mode | S_IXUSR) < 0)
1.6       millert    80:                        err(2, "%s", name);
1.1       deraadt    81:                break;
                     82:        default:
                     83:                usage();
                     84:        }
1.4       deraadt    85:        exit(sb.st_mode & S_IXUSR ? 0 : 1);
1.1       deraadt    86: }
                     87:
                     88: static void
1.9       deraadt    89: usage(void)
1.1       deraadt    90: {
1.10      jmc        91:        (void)fprintf(stderr, "usage: biff [n | y]\n");
1.1       deraadt    92:        exit(2);
                     93: }