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f7f1ba77 | 1 | /* |
8cd80b50 SG |
2 | * Copyright © 2012 Serge Hallyn <serge.hallyn@ubuntu.com>. |
3 | * Copyright © 2012 Canonical Ltd. | |
2aa12318 SH |
4 | * |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU Lesser General Public | |
7 | * License as published by the Free Software Foundation; either | |
8 | * version 2.1 of the License, or (at your option) any later version. | |
9 | * | |
10 | * This library is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * Lesser General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU Lesser General Public | |
16 | * License along with this library; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | */ | |
19 | #include <alloca.h> | |
20 | #include <stdio.h> | |
21 | #include <sched.h> | |
22 | #include <unistd.h> | |
23 | #include <signal.h> | |
24 | #include <sys/reboot.h> | |
25 | #include <sys/types.h> | |
26 | #include <sys/wait.h> | |
27 | ||
f2363e38 | 28 | #include "lxc/namespace.h" |
4012c891 | 29 | |
2aa12318 SH |
30 | #include <sched.h> |
31 | #include <linux/sched.h> | |
32 | #include <linux/reboot.h> | |
33 | ||
f3cef1cb | 34 | int clone(int (*fn)(void *), void *child_stack, int flags, void *arg, ...); |
2aa12318 SH |
35 | |
36 | static int do_reboot(void *arg) | |
37 | { | |
d028235d | 38 | int *cmd = arg; |
2aa12318 | 39 | |
d028235d SG |
40 | if (reboot(*cmd)) |
41 | printf("failed to reboot(%d): %m\n", *cmd); | |
2aa12318 SH |
42 | return 0; |
43 | } | |
44 | ||
0b98289e | 45 | static int test_reboot(int cmd, int sig) |
2aa12318 | 46 | { |
d028235d SG |
47 | long stack_size = 4096; |
48 | void *stack = alloca(stack_size) + stack_size; | |
49 | int status; | |
50 | pid_t ret; | |
51 | ||
52 | ret = clone(do_reboot, stack, CLONE_NEWPID | SIGCHLD, &cmd); | |
53 | if (ret < 0) { | |
54 | printf("failed to clone: %m\n"); | |
55 | return -1; | |
56 | } | |
57 | ||
58 | if (wait(&status) < 0) { | |
59 | printf("unexpected wait error: %m\n"); | |
60 | return -1; | |
61 | } | |
62 | ||
63 | if (!WIFSIGNALED(status)) { | |
2aa12318 SH |
64 | if (sig != -1) |
65 | printf("child process exited but was not signaled\n"); | |
d028235d SG |
66 | return -1; |
67 | } | |
2aa12318 | 68 | |
d028235d SG |
69 | if (WTERMSIG(status) != sig) { |
70 | printf("signal termination is not the one expected\n"); | |
71 | return -1; | |
72 | } | |
2aa12318 | 73 | |
d028235d | 74 | return 0; |
2aa12318 SH |
75 | } |
76 | ||
77 | static int have_reboot_patch(void) | |
78 | { | |
79 | FILE *f = fopen("/proc/sys/kernel/ctrl-alt-del", "r"); | |
80 | int ret; | |
81 | int v; | |
82 | ||
83 | if (!f) | |
84 | return 0; | |
85 | ||
86 | ret = fscanf(f, "%d", &v); | |
87 | fclose(f); | |
88 | if (ret != 1) | |
89 | return 0; | |
90 | ret = reboot(v ? LINUX_REBOOT_CMD_CAD_ON : LINUX_REBOOT_CMD_CAD_OFF); | |
91 | if (ret != -1) | |
92 | return 0; | |
93 | return 1; | |
94 | } | |
95 | ||
96 | int main(int argc, char *argv[]) | |
97 | { | |
d028235d | 98 | int status; |
2aa12318 SH |
99 | |
100 | if (getuid() != 0) { | |
d028235d SG |
101 | printf("Must run as root.\n"); |
102 | return 1; | |
2aa12318 SH |
103 | } |
104 | ||
105 | status = have_reboot_patch(); | |
106 | if (status != 0) { | |
d028235d SG |
107 | printf("Your kernel does not have the container reboot patch\n"); |
108 | return 1; | |
2aa12318 SH |
109 | } |
110 | ||
d028235d SG |
111 | status = test_reboot(LINUX_REBOOT_CMD_CAD_ON, -1); |
112 | if (status >= 0) { | |
113 | printf("reboot(LINUX_REBOOT_CMD_CAD_ON) should have failed\n"); | |
114 | return 1; | |
115 | } | |
116 | printf("reboot(LINUX_REBOOT_CMD_CAD_ON) has failed as expected\n"); | |
117 | ||
118 | status = test_reboot(LINUX_REBOOT_CMD_RESTART, SIGHUP); | |
119 | if (status < 0) | |
120 | return 1; | |
121 | printf("reboot(LINUX_REBOOT_CMD_RESTART) succeed\n"); | |
122 | ||
123 | status = test_reboot(LINUX_REBOOT_CMD_RESTART2, SIGHUP); | |
124 | if (status < 0) | |
125 | return 1; | |
126 | printf("reboot(LINUX_REBOOT_CMD_RESTART2) succeed\n"); | |
127 | ||
128 | status = test_reboot(LINUX_REBOOT_CMD_HALT, SIGINT); | |
129 | if (status < 0) | |
130 | return 1; | |
131 | printf("reboot(LINUX_REBOOT_CMD_HALT) succeed\n"); | |
132 | ||
133 | status = test_reboot(LINUX_REBOOT_CMD_POWER_OFF, SIGINT); | |
134 | if (status < 0) | |
135 | return 1; | |
136 | printf("reboot(LINUX_REBOOT_CMD_POWERR_OFF) succeed\n"); | |
137 | ||
138 | printf("All tests passed\n"); | |
139 | return 0; | |
2aa12318 | 140 | } |