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Annotation of src/usr.bin/biff/biff.c, Revision 1.2

1.2     ! deraadt     1: /*     $OpenBSD: biff.c,v 1.3 1995/03/26 02:34:22 glass 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.
                     16:  * 3. All advertising materials mentioning features or use of this software
                     17:  *    must display the following acknowledgement:
                     18:  *     This product includes software developed by the University of
                     19:  *     California, Berkeley and its contributors.
                     20:  * 4. Neither the name of the University nor the names of its contributors
                     21:  *    may be used to endorse or promote products derived from this software
                     22:  *    without specific prior written permission.
                     23:  *
                     24:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     25:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     26:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     27:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     28:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     29:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     30:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     31:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     32:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     33:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     34:  * SUCH DAMAGE.
                     35:  */
                     36:
                     37: #ifndef lint
                     38: static char copyright[] =
                     39: "@(#) Copyright (c) 1980, 1993\n\
                     40:        The Regents of the University of California.  All rights reserved.\n";
                     41: #endif /* not lint */
                     42:
                     43: #ifndef lint
                     44: #if 0
                     45: static char sccsid[] = "@(#)biff.c     8.1 (Berkeley) 6/6/93";
                     46: #else
1.2     ! deraadt    47: static char rcsid[] = "$OpenBSD: biff.c,v 1.3 1995/03/26 02:34:22 glass Exp $";
1.1       deraadt    48: #endif
                     49: #endif /* not lint */
                     50:
                     51: #include <sys/types.h>
                     52: #include <sys/stat.h>
                     53:
                     54: #include <err.h>
                     55: #include <errno.h>
                     56: #include <stdio.h>
                     57: #include <stdlib.h>
                     58: #include <string.h>
                     59: #include <unistd.h>
                     60:
                     61: static void usage __P((void));
                     62:
                     63: main(argc, argv)
                     64:        int argc;
                     65:        char *argv[];
                     66: {
                     67:        struct stat sb;
                     68:        int ch;
                     69:        char *name;
                     70:
                     71:
                     72:        while ((ch = getopt(argc, argv, "")) != EOF)
                     73:                switch(ch) {
                     74:                case '?':
                     75:                default:
                     76:                        usage();
                     77:                }
                     78:        argc -= optind;
                     79:        argv += optind;
                     80:
                     81:        if ((name = ttyname(STDERR_FILENO)) == NULL)
                     82:                err(2, "tty");
                     83:
                     84:        if (stat(name, &sb))
                     85:                err(2, "stat");
                     86:
                     87:        if (*argv == NULL) {
                     88:                (void)printf("is %s\n", sb.st_mode&0100 ? "y" : "n");
                     89:                exit(sb.st_mode & 0100 ? 0 : 1);
                     90:        }
                     91:
                     92:        switch(argv[0][0]) {
                     93:        case 'n':
                     94:                if (chmod(name, sb.st_mode & ~0100) < 0)
                     95:                        err(2, name);
                     96:                break;
                     97:        case 'y':
                     98:                if (chmod(name, sb.st_mode | 0100) < 0)
                     99:                        err(2, name);
                    100:                break;
                    101:        default:
                    102:                usage();
                    103:        }
                    104:        exit(sb.st_mode & 0100 ? 0 : 1);
                    105: }
                    106:
                    107: static void
                    108: usage()
                    109: {
                    110:        (void)fprintf(stderr, "usage: biff [y | n]\n");
                    111:        exit(2);
                    112: }