1 /*
2 * Copyright (c) 2019 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@dragonflybsd.org>
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 *
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
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include "hammer2.h"
36
cmd_emergency_mode(const char * sel_path __unused,int enable,int ac,const char ** av)37 int cmd_emergency_mode(const char *sel_path __unused, int enable,
38 int ac, const char **av)
39 {
40 int error = 0;
41 int fd;
42
43 if (ac != 1) {
44 fprintf(stderr, "Expected <filesystem> argument\n");
45 return 1;
46 }
47 fd = open(av[0], O_RDONLY);
48 if (fd < 0) {
49 fprintf(stderr, "Unable to find \"%s\"\n", av[0]);
50 return 1;
51 }
52 if (ioctl(fd, HAMMER2IOC_EMERG_MODE, &enable) == 0) {
53 if (enable)
54 printf("Emergency mode on \"%s\" enabled\n", av[0]);
55 else
56 printf("Emergency mode on \"%s\" disabled\n", av[0]);
57 } else {
58 printf("Cannot change emerg mode: %s\n", strerror(errno));
59 error = 1;
60 }
61 close(fd);
62
63 return error;
64 }
65