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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
4a2a8b5a 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 | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
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 | |
16 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <stdio.h> | |
23 | #include <getopt.h> | |
24 | #include <error.h> | |
25 | #include <errno.h> | |
26 | #include <unistd.h> | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
29 | ||
81527be1 LP |
30 | #include <systemd/sd-daemon.h> |
31 | ||
4a2a8b5a LP |
32 | #include "strv.h" |
33 | #include "util.h" | |
34 | #include "log.h" | |
1bc5d57a | 35 | #include "sd-readahead.h" |
4a2a8b5a LP |
36 | |
37 | static bool arg_ready = false; | |
38 | static pid_t arg_pid = 0; | |
39 | static const char *arg_status = NULL; | |
96551bae | 40 | static bool arg_booted = false; |
6624768c | 41 | static const char *arg_readahead = NULL; |
4a2a8b5a LP |
42 | |
43 | static int help(void) { | |
44 | ||
2e33c433 | 45 | printf("%s [OPTIONS...] [VARIABLE=VALUE...]\n\n" |
4a2a8b5a | 46 | "Notify the init system about service status updates.\n\n" |
6624768c LP |
47 | " -h --help Show this help\n" |
48 | " --ready Inform the init system about service start-up completion\n" | |
49 | " --pid[=PID] Set main pid of daemon\n" | |
50 | " --status=TEXT Set status text\n" | |
51 | " --booted Returns 0 if the system was booted up with systemd, non-zero otherwise\n" | |
52 | " --readahead=ACTION Controls read-ahead operations\n", | |
4a2a8b5a LP |
53 | program_invocation_short_name); |
54 | ||
55 | return 0; | |
56 | } | |
57 | ||
58 | static int parse_argv(int argc, char *argv[]) { | |
59 | ||
60 | enum { | |
61 | ARG_READY = 0x100, | |
62 | ARG_PID, | |
96551bae | 63 | ARG_STATUS, |
6624768c LP |
64 | ARG_BOOTED, |
65 | ARG_READAHEAD | |
4a2a8b5a LP |
66 | }; |
67 | ||
68 | static const struct option options[] = { | |
6624768c LP |
69 | { "help", no_argument, NULL, 'h' }, |
70 | { "ready", no_argument, NULL, ARG_READY }, | |
71 | { "pid", optional_argument, NULL, ARG_PID }, | |
72 | { "status", required_argument, NULL, ARG_STATUS }, | |
73 | { "booted", no_argument, NULL, ARG_BOOTED }, | |
74 | { "readahead", required_argument, NULL, ARG_READAHEAD }, | |
75 | { NULL, 0, NULL, 0 } | |
4a2a8b5a LP |
76 | }; |
77 | ||
78 | int c; | |
79 | ||
80 | assert(argc >= 0); | |
81 | assert(argv); | |
82 | ||
83 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) { | |
84 | ||
85 | switch (c) { | |
86 | ||
87 | case 'h': | |
88 | help(); | |
89 | return 0; | |
90 | ||
91 | case ARG_READY: | |
92 | arg_ready = true; | |
93 | break; | |
94 | ||
95 | case ARG_PID: | |
96 | ||
97 | if (optarg) { | |
98 | if (parse_pid(optarg, &arg_pid) < 0) { | |
99 | log_error("Failed to parse PID %s.", optarg); | |
100 | return -EINVAL; | |
101 | } | |
102 | } else | |
103 | arg_pid = getppid(); | |
104 | ||
105 | break; | |
106 | ||
107 | case ARG_STATUS: | |
108 | arg_status = optarg; | |
109 | break; | |
110 | ||
96551bae LP |
111 | case ARG_BOOTED: |
112 | arg_booted = true; | |
113 | break; | |
114 | ||
6624768c LP |
115 | case ARG_READAHEAD: |
116 | arg_readahead = optarg; | |
117 | break; | |
118 | ||
4a2a8b5a LP |
119 | case '?': |
120 | return -EINVAL; | |
121 | ||
122 | default: | |
123 | log_error("Unknown option code %c", c); | |
124 | return -EINVAL; | |
125 | } | |
126 | } | |
127 | ||
2f02ce40 LP |
128 | if (optind >= argc && |
129 | !arg_ready && | |
130 | !arg_status && | |
131 | !arg_pid && | |
6624768c LP |
132 | !arg_booted && |
133 | !arg_readahead) { | |
2f02ce40 LP |
134 | help(); |
135 | return -EINVAL; | |
136 | } | |
137 | ||
4a2a8b5a LP |
138 | return 1; |
139 | } | |
140 | ||
141 | int main(int argc, char* argv[]) { | |
142 | char* our_env[4], **final_env = NULL; | |
143 | unsigned i = 0; | |
144 | char *status = NULL, *cpid = NULL, *n = NULL; | |
22f4096c | 145 | int r, retval = EXIT_FAILURE; |
4a2a8b5a LP |
146 | |
147 | log_parse_environment(); | |
2396fb04 | 148 | log_open(); |
4a2a8b5a LP |
149 | |
150 | if ((r = parse_argv(argc, argv)) <= 0) { | |
22f4096c | 151 | retval = r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
4a2a8b5a LP |
152 | goto finish; |
153 | } | |
154 | ||
96551bae LP |
155 | if (arg_booted) |
156 | return sd_booted() <= 0; | |
157 | ||
6624768c LP |
158 | if (arg_readahead) { |
159 | if ((r = sd_readahead(arg_readahead)) < 0) { | |
160 | log_error("Failed to issue read-ahead control command: %s", strerror(-r)); | |
161 | goto finish; | |
162 | } | |
163 | } | |
164 | ||
4a2a8b5a LP |
165 | if (arg_ready) |
166 | our_env[i++] = (char*) "READY=1"; | |
167 | ||
168 | if (arg_status) { | |
169 | if (!(status = strappend("STATUS=", arg_status))) { | |
170 | log_error("Failed to allocate STATUS string."); | |
171 | goto finish; | |
172 | } | |
173 | ||
174 | our_env[i++] = status; | |
175 | } | |
176 | ||
177 | if (arg_pid > 0) { | |
178 | if (asprintf(&cpid, "MAINPID=%lu", (unsigned long) arg_pid) < 0) { | |
179 | log_error("Failed to allocate MAINPID string."); | |
180 | goto finish; | |
181 | } | |
182 | ||
183 | our_env[i++] = cpid; | |
184 | } | |
185 | ||
186 | our_env[i++] = NULL; | |
187 | ||
188 | if (!(final_env = strv_env_merge(2, our_env, argv + optind))) { | |
189 | log_error("Failed to merge string sets."); | |
190 | goto finish; | |
191 | } | |
192 | ||
193 | if (strv_length(final_env) <= 0) { | |
22f4096c | 194 | retval = EXIT_SUCCESS; |
4a2a8b5a LP |
195 | goto finish; |
196 | } | |
197 | ||
198 | if (!(n = strv_join(final_env, "\n"))) { | |
199 | log_error("Failed to concatenate strings."); | |
200 | goto finish; | |
201 | } | |
202 | ||
203 | if ((r = sd_notify(false, n)) < 0) { | |
204 | log_error("Failed to notify init system: %s", strerror(-r)); | |
205 | goto finish; | |
206 | } | |
207 | ||
22f4096c | 208 | retval = r <= 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
4a2a8b5a LP |
209 | |
210 | finish: | |
211 | free(status); | |
212 | free(cpid); | |
213 | free(n); | |
214 | ||
215 | strv_free(final_env); | |
216 | ||
217 | return retval; | |
218 | } |