Annotation of src/usr.bin/biff/biff.c, Revision 1.17
1.17 ! deraadt 1: /* $OpenBSD: biff.c,v 1.16 2018/08/11 10:59:34 mestre 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:
1.3 millert 52: while ((ch = getopt(argc, argv, "")) != -1)
1.1 deraadt 53: switch(ch) {
54: case '?':
55: default:
56: usage();
57: }
58: argc -= optind;
59: argv += optind;
60:
61: if ((name = ttyname(STDERR_FILENO)) == NULL)
62: err(2, "tty");
1.16 mestre 63:
64: if (unveil(name, "rw") == -1)
65: err(2, "unveil");
66: if (pledge("stdio rpath fattr", NULL) == -1)
67: err(2, "pledge");
1.1 deraadt 68:
69: if (stat(name, &sb))
70: err(2, "stat");
1.15 semarie 71:
72: sb.st_mode &= ACCESSPERMS;
1.1 deraadt 73:
74: if (*argv == NULL) {
1.4 deraadt 75: (void)printf("is %s\n", sb.st_mode & S_IXUSR ? "y" : "n");
76: exit(sb.st_mode & S_IXUSR ? 0 : 1);
1.1 deraadt 77: }
78:
79: switch(argv[0][0]) {
80: case 'n':
1.17 ! deraadt 81: if (chmod(name, sb.st_mode & ~S_IXUSR) == -1)
1.6 millert 82: err(2, "%s", name);
1.1 deraadt 83: break;
84: case 'y':
1.17 ! deraadt 85: if (chmod(name, sb.st_mode | S_IXUSR) == -1)
1.6 millert 86: err(2, "%s", name);
1.1 deraadt 87: break;
88: default:
89: usage();
90: }
1.4 deraadt 91: exit(sb.st_mode & S_IXUSR ? 0 : 1);
1.1 deraadt 92: }
93:
94: static void
1.9 deraadt 95: usage(void)
1.1 deraadt 96: {
1.10 jmc 97: (void)fprintf(stderr, "usage: biff [n | y]\n");
1.1 deraadt 98: exit(2);
99: }