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Annotation of src/usr.bin/biff/biff.c, Revision 1.1

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