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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
5c616ecf AZ |
2 | |
3 | #include <getopt.h> | |
4 | #include <unistd.h> | |
5 | ||
6 | #include "bus-error.h" | |
7 | #include "copy.h" | |
8 | #include "main-func.h" | |
9 | #include "pretty-print.h" | |
10 | #include "terminal-util.h" | |
11 | #include "verbs.h" | |
12 | ||
13 | static PagerFlags arg_pager_flags = 0; | |
14 | ||
15 | static int help(int argc, char *argv[], void *userdata) { | |
16 | _cleanup_free_ char *link = NULL; | |
17 | int r; | |
18 | ||
19 | (void) pager_open(arg_pager_flags); | |
20 | ||
21 | r = terminal_urlify_man("oomctl", "1", &link); | |
22 | if (r < 0) | |
23 | return log_oom(); | |
24 | ||
25 | printf("%1$s [OPTIONS...] COMMAND ...\n\n" | |
26 | "%2$sManage or inspect the userspace OOM killer.%3$s\n" | |
27 | "\n%4$sCommands:%5$s\n" | |
28 | " dump Output the current state of systemd-oomd\n" | |
29 | "\n%4$sOptions:%5$s\n" | |
30 | " -h --help Show this help\n" | |
31 | " --version Show package version\n" | |
32 | " --no-pager Do not pipe output into a pager\n" | |
bc556335 DDM |
33 | "\nSee the %6$s for details.\n", |
34 | program_invocation_short_name, | |
35 | ansi_highlight(), | |
36 | ansi_normal(), | |
37 | ansi_underline(), | |
38 | ansi_normal(), | |
39 | link); | |
5c616ecf AZ |
40 | |
41 | return 0; | |
42 | } | |
43 | ||
44 | static int dump_state(int argc, char *argv[], void *userdata) { | |
45 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; | |
46 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; | |
47 | _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; | |
48 | int fd = -1; | |
49 | int r; | |
50 | ||
51 | r = sd_bus_open_system(&bus); | |
52 | if (r < 0) | |
53 | return log_error_errno(r, "Failed to connect system bus: %m"); | |
54 | ||
55 | (void) pager_open(arg_pager_flags); | |
56 | ||
57 | r = sd_bus_call_method( | |
58 | bus, | |
59 | "org.freedesktop.oom1", | |
60 | "/org/freedesktop/oom1", | |
61 | "org.freedesktop.oom1.Manager", | |
62 | "DumpByFileDescriptor", | |
63 | &error, | |
64 | &reply, | |
65 | NULL); | |
66 | if (r < 0) | |
67 | return log_error_errno(r, "Failed to dump context: %s", bus_error_message(&error, r)); | |
68 | ||
69 | r = sd_bus_message_read(reply, "h", &fd); | |
70 | if (r < 0) | |
71 | return bus_log_parse_error(r); | |
72 | ||
73 | fflush(stdout); | |
74 | return copy_bytes(fd, STDOUT_FILENO, (uint64_t) -1, 0); | |
75 | } | |
76 | ||
77 | static int parse_argv(int argc, char *argv[]) { | |
78 | enum { | |
79 | ARG_VERSION = 0x100, | |
80 | ARG_NO_PAGER, | |
81 | }; | |
82 | ||
83 | static const struct option options[] = { | |
84 | { "help", no_argument, NULL, 'h' }, | |
85 | { "version", no_argument, NULL, ARG_VERSION }, | |
86 | { "no-pager", no_argument, NULL, ARG_NO_PAGER }, | |
87 | {} | |
88 | }; | |
89 | ||
90 | int c; | |
91 | ||
92 | assert(argc >= 0); | |
93 | assert(argv); | |
94 | ||
95 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) | |
96 | ||
97 | switch (c) { | |
98 | ||
99 | case 'h': | |
100 | return help(0, NULL, NULL); | |
101 | ||
102 | case ARG_VERSION: | |
103 | return version(); | |
104 | ||
105 | case ARG_NO_PAGER: | |
106 | arg_pager_flags |= PAGER_DISABLE; | |
107 | break; | |
108 | ||
109 | case '?': | |
110 | return -EINVAL; | |
111 | ||
112 | default: | |
113 | assert_not_reached("Invalid option passed."); | |
114 | } | |
115 | ||
116 | return 1; | |
117 | } | |
118 | ||
119 | static int run(int argc, char* argv[]) { | |
120 | static const Verb verbs[] = { | |
121 | { "help", VERB_ANY, VERB_ANY, 0, help }, | |
122 | { "dump", VERB_ANY, 1, VERB_DEFAULT, dump_state }, | |
123 | {} | |
124 | }; | |
125 | ||
126 | int r; | |
127 | ||
128 | log_show_color(true); | |
129 | log_parse_environment(); | |
130 | log_open(); | |
131 | ||
132 | r = parse_argv(argc, argv); | |
133 | if (r <= 0) | |
134 | return r; | |
135 | ||
136 | return dispatch_verb(argc, argv, verbs, NULL); | |
137 | } | |
138 | ||
139 | DEFINE_MAIN_FUNCTION(run); |