]>
Commit | Line | Data |
---|---|---|
53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
4a2a8b5a | 2 | |
4a2a8b5a | 3 | #include <errno.h> |
6f2deb84 LP |
4 | #include <getopt.h> |
5 | #include <stdio.h> | |
4a2a8b5a | 6 | #include <stdlib.h> |
6f2deb84 | 7 | #include <unistd.h> |
4a2a8b5a | 8 | |
6f2deb84 | 9 | #include "sd-daemon.h" |
81527be1 | 10 | |
b5efdb8a | 11 | #include "alloc-util.h" |
4d1a6904 | 12 | #include "env-util.h" |
f97b34a6 | 13 | #include "format-util.h" |
6f2deb84 | 14 | #include "log.h" |
6bedfcbb | 15 | #include "parse-util.h" |
07630cea | 16 | #include "string-util.h" |
6f2deb84 | 17 | #include "strv.h" |
65c6b990 | 18 | #include "user-util.h" |
6f2deb84 | 19 | #include "util.h" |
4a2a8b5a LP |
20 | |
21 | static bool arg_ready = false; | |
22 | static pid_t arg_pid = 0; | |
23 | static const char *arg_status = NULL; | |
96551bae | 24 | static bool arg_booted = false; |
65c6b990 LP |
25 | static uid_t arg_uid = UID_INVALID; |
26 | static gid_t arg_gid = GID_INVALID; | |
4a2a8b5a | 27 | |
601185b4 | 28 | static void help(void) { |
2e33c433 | 29 | printf("%s [OPTIONS...] [VARIABLE=VALUE...]\n\n" |
4a2a8b5a | 30 | "Notify the init system about service status updates.\n\n" |
b57b0625 ZJS |
31 | " -h --help Show this help\n" |
32 | " --version Show package version\n" | |
33 | " --ready Inform the init system about service start-up completion\n" | |
65c6b990 LP |
34 | " --pid[=PID] Set main PID of daemon\n" |
35 | " --uid=USER Set user to send from\n" | |
b57b0625 ZJS |
36 | " --status=TEXT Set status text\n" |
37 | " --booted Check if the system was booted up with systemd\n", | |
4a2a8b5a | 38 | program_invocation_short_name); |
4a2a8b5a LP |
39 | } |
40 | ||
41 | static int parse_argv(int argc, char *argv[]) { | |
42 | ||
43 | enum { | |
44 | ARG_READY = 0x100, | |
9aac0b2c | 45 | ARG_VERSION, |
4a2a8b5a | 46 | ARG_PID, |
96551bae | 47 | ARG_STATUS, |
6624768c | 48 | ARG_BOOTED, |
65c6b990 | 49 | ARG_UID, |
4a2a8b5a LP |
50 | }; |
51 | ||
52 | static const struct option options[] = { | |
6624768c | 53 | { "help", no_argument, NULL, 'h' }, |
9aac0b2c | 54 | { "version", no_argument, NULL, ARG_VERSION }, |
6624768c LP |
55 | { "ready", no_argument, NULL, ARG_READY }, |
56 | { "pid", optional_argument, NULL, ARG_PID }, | |
57 | { "status", required_argument, NULL, ARG_STATUS }, | |
58 | { "booted", no_argument, NULL, ARG_BOOTED }, | |
65c6b990 | 59 | { "uid", required_argument, NULL, ARG_UID }, |
eb9da376 | 60 | {} |
4a2a8b5a LP |
61 | }; |
62 | ||
65c6b990 | 63 | int c, r; |
4a2a8b5a LP |
64 | |
65 | assert(argc >= 0); | |
66 | assert(argv); | |
67 | ||
ee8c4568 | 68 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) { |
4a2a8b5a LP |
69 | |
70 | switch (c) { | |
71 | ||
72 | case 'h': | |
601185b4 ZJS |
73 | help(); |
74 | return 0; | |
4a2a8b5a | 75 | |
9aac0b2c | 76 | case ARG_VERSION: |
3f6fd1ba | 77 | return version(); |
9aac0b2c | 78 | |
4a2a8b5a LP |
79 | case ARG_READY: |
80 | arg_ready = true; | |
81 | break; | |
82 | ||
83 | case ARG_PID: | |
84 | ||
85 | if (optarg) { | |
86 | if (parse_pid(optarg, &arg_pid) < 0) { | |
87 | log_error("Failed to parse PID %s.", optarg); | |
88 | return -EINVAL; | |
89 | } | |
90 | } else | |
91 | arg_pid = getppid(); | |
92 | ||
93 | break; | |
94 | ||
95 | case ARG_STATUS: | |
96 | arg_status = optarg; | |
97 | break; | |
98 | ||
96551bae LP |
99 | case ARG_BOOTED: |
100 | arg_booted = true; | |
101 | break; | |
102 | ||
65c6b990 LP |
103 | case ARG_UID: { |
104 | const char *u = optarg; | |
105 | ||
106 | r = get_user_creds(&u, &arg_uid, &arg_gid, NULL, NULL); | |
107 | if (r == -ESRCH) /* If the user doesn't exist, then accept it anyway as numeric */ | |
108 | r = parse_uid(u, &arg_uid); | |
109 | if (r < 0) | |
110 | return log_error_errno(r, "Can't resolve user %s: %m", optarg); | |
111 | ||
112 | break; | |
113 | } | |
114 | ||
4a2a8b5a LP |
115 | case '?': |
116 | return -EINVAL; | |
117 | ||
118 | default: | |
eb9da376 | 119 | assert_not_reached("Unhandled option"); |
4a2a8b5a | 120 | } |
ee8c4568 | 121 | } |
4a2a8b5a | 122 | |
2f02ce40 LP |
123 | if (optind >= argc && |
124 | !arg_ready && | |
125 | !arg_status && | |
126 | !arg_pid && | |
d6bc8348 | 127 | !arg_booted) { |
2f02ce40 LP |
128 | help(); |
129 | return -EINVAL; | |
130 | } | |
131 | ||
4a2a8b5a LP |
132 | return 1; |
133 | } | |
134 | ||
135 | int main(int argc, char* argv[]) { | |
be8f4e9e LP |
136 | _cleanup_free_ char *status = NULL, *cpid = NULL, *n = NULL; |
137 | _cleanup_strv_free_ char **final_env = NULL; | |
138 | char* our_env[4]; | |
4a2a8b5a | 139 | unsigned i = 0; |
be8f4e9e | 140 | int r; |
4a2a8b5a LP |
141 | |
142 | log_parse_environment(); | |
2396fb04 | 143 | log_open(); |
4a2a8b5a | 144 | |
6c12b52e | 145 | r = parse_argv(argc, argv); |
be8f4e9e | 146 | if (r <= 0) |
4a2a8b5a | 147 | goto finish; |
4a2a8b5a | 148 | |
96551bae LP |
149 | if (arg_booted) |
150 | return sd_booted() <= 0; | |
151 | ||
4a2a8b5a LP |
152 | if (arg_ready) |
153 | our_env[i++] = (char*) "READY=1"; | |
154 | ||
155 | if (arg_status) { | |
be8f4e9e LP |
156 | status = strappend("STATUS=", arg_status); |
157 | if (!status) { | |
158 | r = log_oom(); | |
4a2a8b5a LP |
159 | goto finish; |
160 | } | |
161 | ||
162 | our_env[i++] = status; | |
163 | } | |
164 | ||
165 | if (arg_pid > 0) { | |
de0671ee | 166 | if (asprintf(&cpid, "MAINPID="PID_FMT, arg_pid) < 0) { |
be8f4e9e | 167 | r = log_oom(); |
4a2a8b5a LP |
168 | goto finish; |
169 | } | |
170 | ||
171 | our_env[i++] = cpid; | |
172 | } | |
173 | ||
174 | our_env[i++] = NULL; | |
175 | ||
be8f4e9e LP |
176 | final_env = strv_env_merge(2, our_env, argv + optind); |
177 | if (!final_env) { | |
178 | r = log_oom(); | |
4a2a8b5a LP |
179 | goto finish; |
180 | } | |
181 | ||
58629001 | 182 | if (strv_isempty(final_env)) { |
be8f4e9e | 183 | r = 0; |
4a2a8b5a LP |
184 | goto finish; |
185 | } | |
186 | ||
be8f4e9e LP |
187 | n = strv_join(final_env, "\n"); |
188 | if (!n) { | |
189 | r = log_oom(); | |
4a2a8b5a LP |
190 | goto finish; |
191 | } | |
192 | ||
65c6b990 LP |
193 | /* If this is requested change to the requested UID/GID. Note thta we only change the real UID here, and leave |
194 | the effective UID in effect (which is 0 for this to work). That's because we want the privileges to fake the | |
195 | ucred data, and sd_pid_notify() uses the real UID for filling in ucred. */ | |
196 | ||
197 | if (arg_gid != GID_INVALID) | |
198 | if (setregid(arg_gid, (gid_t) -1) < 0) { | |
199 | r = log_error_errno(errno, "Failed to change GID: %m"); | |
200 | goto finish; | |
201 | } | |
202 | ||
203 | if (arg_uid != UID_INVALID) | |
204 | if (setreuid(arg_uid, (uid_t) -1) < 0) { | |
205 | r = log_error_errno(errno, "Failed to change UID: %m"); | |
206 | goto finish; | |
207 | } | |
208 | ||
9de009a9 | 209 | r = sd_pid_notify(arg_pid ? arg_pid : getppid(), false, n); |
be8f4e9e | 210 | if (r < 0) { |
da927ba9 | 211 | log_error_errno(r, "Failed to notify init system: %m"); |
4a2a8b5a | 212 | goto finish; |
39b50ad1 EV |
213 | } else if (r == 0) { |
214 | log_error("No status data could be sent: $NOTIFY_SOCKET was not set"); | |
15411c0c | 215 | r = -EOPNOTSUPP; |
39b50ad1 | 216 | } |
4a2a8b5a LP |
217 | |
218 | finish: | |
be8f4e9e | 219 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
4a2a8b5a | 220 | } |