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Annotation of src/usr.bin/biff/biff.c, Revision 1.9

1.9     ! deraadt     1: /*     $OpenBSD: biff.c,v 1.8 2003/06/03 02:56:06 millert 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: #ifndef lint
                     34: static char copyright[] =
                     35: "@(#) Copyright (c) 1980, 1993\n\
                     36:        The Regents of the University of California.  All rights reserved.\n";
                     37: #endif /* not lint */
                     38:
                     39: #ifndef lint
                     40: #if 0
                     41: static char sccsid[] = "@(#)biff.c     8.1 (Berkeley) 6/6/93";
                     42: #else
1.9     ! deraadt    43: static char rcsid[] = "$OpenBSD: biff.c,v 1.8 2003/06/03 02:56:06 millert Exp $";
1.1       deraadt    44: #endif
                     45: #endif /* not lint */
                     46:
                     47: #include <sys/types.h>
                     48: #include <sys/stat.h>
                     49:
                     50: #include <err.h>
                     51: #include <errno.h>
                     52: #include <stdio.h>
                     53: #include <stdlib.h>
                     54: #include <string.h>
                     55: #include <unistd.h>
                     56:
1.7       millert    57: static void usage(void);
1.1       deraadt    58:
1.5       deraadt    59: int
1.9     ! deraadt    60: main(int argc, char *argv[])
1.1       deraadt    61: {
                     62:        struct stat sb;
                     63:        int ch;
                     64:        char *name;
                     65:
                     66:
1.3       millert    67:        while ((ch = getopt(argc, argv, "")) != -1)
1.1       deraadt    68:                switch(ch) {
                     69:                case '?':
                     70:                default:
                     71:                        usage();
                     72:                }
                     73:        argc -= optind;
                     74:        argv += optind;
                     75:
                     76:        if ((name = ttyname(STDERR_FILENO)) == NULL)
                     77:                err(2, "tty");
                     78:
                     79:        if (stat(name, &sb))
                     80:                err(2, "stat");
                     81:
                     82:        if (*argv == NULL) {
1.4       deraadt    83:                (void)printf("is %s\n", sb.st_mode & S_IXUSR ? "y" : "n");
                     84:                exit(sb.st_mode & S_IXUSR ? 0 : 1);
1.1       deraadt    85:        }
                     86:
                     87:        switch(argv[0][0]) {
                     88:        case 'n':
1.4       deraadt    89:                if (chmod(name, sb.st_mode & ~S_IXUSR) < 0)
1.6       millert    90:                        err(2, "%s", name);
1.1       deraadt    91:                break;
                     92:        case 'y':
1.4       deraadt    93:                if (chmod(name, sb.st_mode | S_IXUSR) < 0)
1.6       millert    94:                        err(2, "%s", name);
1.1       deraadt    95:                break;
                     96:        default:
                     97:                usage();
                     98:        }
1.4       deraadt    99:        exit(sb.st_mode & S_IXUSR ? 0 : 1);
1.1       deraadt   100: }
                    101:
                    102: static void
1.9     ! deraadt   103: usage(void)
1.1       deraadt   104: {
                    105:        (void)fprintf(stderr, "usage: biff [y | n]\n");
                    106:        exit(2);
                    107: }