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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
fa776d8e LP |
2 | |
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
fa776d8e LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
fa776d8e | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
fa776d8e LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <limits.h> | |
23 | #include <stdio.h> | |
24 | #include <unistd.h> | |
25 | #include <errno.h> | |
26 | #include <getopt.h> | |
27 | #include <string.h> | |
28 | ||
29 | #include "cgroup-show.h" | |
c6c18be3 | 30 | #include "cgroup-util.h" |
fa776d8e LP |
31 | #include "log.h" |
32 | #include "util.h" | |
1968a360 LP |
33 | #include "pager.h" |
34 | ||
35 | static bool arg_no_pager = false; | |
1e5678d0 | 36 | static bool arg_kernel_threads = false; |
fa776d8e LP |
37 | |
38 | static void help(void) { | |
39 | ||
40 | printf("%s [OPTIONS...] [CGROUP...]\n\n" | |
41 | "Recursively show control group contents.\n\n" | |
69fc152f | 42 | " -h --help Show this help\n" |
1e5678d0 LP |
43 | " --no-pager Do not pipe output into a pager\n" |
44 | " -k Include kernel threads in output\n", | |
fa776d8e LP |
45 | program_invocation_short_name); |
46 | } | |
47 | ||
48 | static int parse_argv(int argc, char *argv[]) { | |
49 | ||
1968a360 LP |
50 | enum { |
51 | ARG_NO_PAGER = 0x100 | |
52 | }; | |
53 | ||
fa776d8e | 54 | static const struct option options[] = { |
1968a360 LP |
55 | { "help", no_argument, NULL, 'h' }, |
56 | { "no-pager", no_argument, NULL, ARG_NO_PAGER }, | |
57 | { NULL, 0, NULL, 0 } | |
fa776d8e LP |
58 | }; |
59 | ||
60 | int c; | |
61 | ||
62 | assert(argc >= 1); | |
63 | assert(argv); | |
64 | ||
1e5678d0 | 65 | while ((c = getopt_long(argc, argv, "hk", options, NULL)) >= 0) { |
fa776d8e LP |
66 | |
67 | switch (c) { | |
68 | ||
69 | case 'h': | |
70 | help(); | |
71 | return 0; | |
72 | ||
1968a360 LP |
73 | case ARG_NO_PAGER: |
74 | arg_no_pager = true; | |
75 | break; | |
76 | ||
1e5678d0 LP |
77 | case 'k': |
78 | arg_kernel_threads = true; | |
79 | break; | |
80 | ||
fa776d8e LP |
81 | case '?': |
82 | return -EINVAL; | |
83 | ||
84 | default: | |
85 | log_error("Unknown option code %c", c); | |
86 | return -EINVAL; | |
87 | } | |
88 | } | |
89 | ||
90 | return 1; | |
91 | } | |
92 | ||
93 | int main(int argc, char *argv[]) { | |
22f4096c | 94 | int r = 0, retval = EXIT_FAILURE; |
fa776d8e LP |
95 | |
96 | log_parse_environment(); | |
2396fb04 | 97 | log_open(); |
fa776d8e | 98 | |
1e5678d0 LP |
99 | r = parse_argv(argc, argv); |
100 | if (r < 0) | |
fa776d8e LP |
101 | goto finish; |
102 | else if (r == 0) { | |
22f4096c | 103 | retval = EXIT_SUCCESS; |
fa776d8e LP |
104 | goto finish; |
105 | } | |
106 | ||
1968a360 LP |
107 | if (!arg_no_pager) |
108 | pager_open(); | |
109 | ||
fa776d8e LP |
110 | if (optind < argc) { |
111 | unsigned i; | |
112 | ||
113 | for (i = (unsigned) optind; i < (unsigned) argc; i++) { | |
114 | int q; | |
115 | printf("%s:\n", argv[i]); | |
116 | ||
1e5678d0 LP |
117 | q = show_cgroup_by_path(argv[i], NULL, 0, arg_kernel_threads); |
118 | if (q < 0) | |
fa776d8e LP |
119 | r = q; |
120 | } | |
121 | ||
122 | } else { | |
123 | char *p; | |
124 | ||
1e5678d0 LP |
125 | p = get_current_dir_name(); |
126 | if (!p) { | |
fa776d8e LP |
127 | log_error("Cannot determine current working directory: %m"); |
128 | goto finish; | |
129 | } | |
130 | ||
77d5f105 | 131 | if (path_startswith(p, "/sys/fs/cgroup")) { |
fa776d8e | 132 | printf("Working Directory %s:\n", p); |
1e5678d0 | 133 | r = show_cgroup_by_path(p, NULL, 0, arg_kernel_threads); |
1f16b4a6 LP |
134 | } else { |
135 | char *root = NULL; | |
136 | const char *t = NULL; | |
137 | ||
1e5678d0 LP |
138 | r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, 1, &root); |
139 | if (r < 0) | |
1f16b4a6 | 140 | t = "/"; |
b9a8e638 LP |
141 | else { |
142 | if (endswith(root, "/system")) | |
143 | root[strlen(root)-7] = 0; | |
144 | ||
145 | t = root[0] ? root : "/"; | |
146 | } | |
1f16b4a6 | 147 | |
1e5678d0 | 148 | r = show_cgroup(SYSTEMD_CGROUP_CONTROLLER, t, NULL, 0, arg_kernel_threads); |
1f16b4a6 LP |
149 | free(root); |
150 | } | |
fa776d8e LP |
151 | |
152 | free(p); | |
153 | } | |
154 | ||
155 | if (r < 0) | |
156 | log_error("Failed to list cgroup tree: %s", strerror(-r)); | |
157 | ||
22f4096c | 158 | retval = EXIT_SUCCESS; |
fa776d8e LP |
159 | |
160 | finish: | |
1968a360 | 161 | pager_close(); |
fa776d8e LP |
162 | |
163 | return retval; | |
164 | } |