0
|
1
|
|
2 /*
|
|
3 * Copyright (C) Igor Sysoev
|
|
4 */
|
|
5
|
|
6
|
|
7 #include <ngx_config.h>
|
|
8 #include <ngx_core.h>
|
|
9 #include <ngx_event.h>
|
|
10 #include <ngx_channel.h>
|
|
11
|
|
12
|
|
13 static void ngx_execute_proc(ngx_cycle_t *cycle, void *data);
|
|
14
|
2
|
15
|
|
16 int ngx_argc;
|
|
17 char **ngx_argv;
|
|
18 char **ngx_os_argv;
|
|
19
|
|
20 ngx_int_t ngx_process_slot;
|
|
21 ngx_socket_t ngx_channel;
|
|
22 ngx_int_t ngx_last_process;
|
|
23 ngx_process_t ngx_processes[NGX_MAX_PROCESSES];
|
0
|
24
|
|
25
|
64
|
26 ngx_pid_t
|
|
27 ngx_spawn_process(ngx_cycle_t *cycle, ngx_spawn_proc_pt proc, void *data,
|
|
28 char *name, ngx_int_t respawn)
|
0
|
29 {
|
|
30 u_long on;
|
|
31 ngx_pid_t pid;
|
|
32 ngx_int_t s;
|
|
33
|
|
34 if (respawn >= 0) {
|
|
35 s = respawn;
|
|
36
|
|
37 } else {
|
|
38 for (s = 0; s < ngx_last_process; s++) {
|
|
39 if (ngx_processes[s].pid == -1) {
|
|
40 break;
|
|
41 }
|
|
42 }
|
|
43
|
|
44 if (s == NGX_MAX_PROCESSES) {
|
|
45 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
46 "no more than %d processes can be spawned",
|
|
47 NGX_MAX_PROCESSES);
|
|
48 return NGX_ERROR;
|
|
49 }
|
|
50 }
|
|
51
|
|
52
|
|
53 if (respawn != NGX_PROCESS_DETACHED) {
|
|
54
|
|
55 /* Solaris 9 still has no AF_LOCAL */
|
|
56
|
|
57 if (socketpair(AF_UNIX, SOCK_STREAM, 0, ngx_processes[s].channel) == -1)
|
|
58 {
|
|
59 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
60 "socketpair() failed while spawning \"%s\"", name);
|
|
61 return NGX_ERROR;
|
|
62 }
|
|
63
|
|
64 ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
65 "channel %d:%d",
|
|
66 ngx_processes[s].channel[0],
|
|
67 ngx_processes[s].channel[1]);
|
|
68
|
|
69 if (ngx_nonblocking(ngx_processes[s].channel[0]) == -1) {
|
|
70 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
71 ngx_nonblocking_n " failed while spawning \"%s\"",
|
|
72 name);
|
|
73 ngx_close_channel(ngx_processes[s].channel, cycle->log);
|
|
74 return NGX_ERROR;
|
|
75 }
|
|
76
|
|
77 if (ngx_nonblocking(ngx_processes[s].channel[1]) == -1) {
|
|
78 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
79 ngx_nonblocking_n " failed while spawning \"%s\"",
|
|
80 name);
|
|
81 ngx_close_channel(ngx_processes[s].channel, cycle->log);
|
|
82 return NGX_ERROR;
|
|
83 }
|
|
84
|
|
85 on = 1;
|
|
86 if (ioctl(ngx_processes[s].channel[0], FIOASYNC, &on) == -1) {
|
|
87 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
88 "ioctl(FIOASYNC) failed while spawning \"%s\"", name);
|
|
89 ngx_close_channel(ngx_processes[s].channel, cycle->log);
|
|
90 return NGX_ERROR;
|
|
91 }
|
|
92
|
|
93 if (fcntl(ngx_processes[s].channel[0], F_SETOWN, ngx_pid) == -1) {
|
|
94 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
95 "fcntl(F_SETOWN) failed while spawning \"%s\"", name);
|
|
96 ngx_close_channel(ngx_processes[s].channel, cycle->log);
|
|
97 return NGX_ERROR;
|
|
98 }
|
|
99
|
|
100 if (fcntl(ngx_processes[s].channel[0], F_SETFD, FD_CLOEXEC) == -1) {
|
|
101 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
102 "fcntl(FD_CLOEXEC) failed while spawning \"%s\"",
|
|
103 name);
|
|
104 ngx_close_channel(ngx_processes[s].channel, cycle->log);
|
|
105 return NGX_ERROR;
|
|
106 }
|
|
107
|
|
108 if (fcntl(ngx_processes[s].channel[1], F_SETFD, FD_CLOEXEC) == -1) {
|
|
109 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
110 "fcntl(FD_CLOEXEC) failed while spawning \"%s\"",
|
|
111 name);
|
|
112 ngx_close_channel(ngx_processes[s].channel, cycle->log);
|
|
113 return NGX_ERROR;
|
|
114 }
|
|
115
|
|
116 ngx_channel = ngx_processes[s].channel[1];
|
|
117
|
|
118 } else {
|
|
119 ngx_processes[s].channel[0] = -1;
|
|
120 ngx_processes[s].channel[1] = -1;
|
|
121 }
|
|
122
|
|
123 ngx_process_slot = s;
|
|
124
|
|
125
|
|
126 pid = fork();
|
|
127
|
|
128 switch (pid) {
|
|
129
|
|
130 case -1:
|
|
131 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
132 "fork() failed while spawning \"%s\"", name);
|
|
133 ngx_close_channel(ngx_processes[s].channel, cycle->log);
|
|
134 return NGX_ERROR;
|
|
135
|
|
136 case 0:
|
|
137 ngx_pid = ngx_getpid();
|
|
138 proc(cycle, data);
|
|
139 break;
|
|
140
|
|
141 default:
|
|
142 break;
|
|
143 }
|
|
144
|
26
|
145 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "start %s %P", name, pid);
|
0
|
146
|
|
147 ngx_processes[s].pid = pid;
|
|
148 ngx_processes[s].exited = 0;
|
|
149
|
|
150 if (respawn >= 0) {
|
|
151 return pid;
|
|
152 }
|
|
153
|
|
154 ngx_processes[s].proc = proc;
|
|
155 ngx_processes[s].data = data;
|
|
156 ngx_processes[s].name = name;
|
|
157 ngx_processes[s].exiting = 0;
|
|
158
|
|
159 switch (respawn) {
|
|
160
|
|
161 case NGX_PROCESS_RESPAWN:
|
|
162 ngx_processes[s].respawn = 1;
|
|
163 ngx_processes[s].just_respawn = 0;
|
|
164 ngx_processes[s].detached = 0;
|
|
165 break;
|
|
166
|
|
167 case NGX_PROCESS_JUST_RESPAWN:
|
|
168 ngx_processes[s].respawn = 1;
|
|
169 ngx_processes[s].just_respawn = 1;
|
|
170 ngx_processes[s].detached = 0;
|
|
171 break;
|
|
172
|
|
173 case NGX_PROCESS_DETACHED:
|
|
174 ngx_processes[s].respawn = 0;
|
|
175 ngx_processes[s].just_respawn = 0;
|
|
176 ngx_processes[s].detached = 1;
|
|
177 break;
|
|
178 }
|
|
179
|
|
180 if (s == ngx_last_process) {
|
|
181 ngx_last_process++;
|
|
182 }
|
|
183
|
|
184 return pid;
|
|
185 }
|
|
186
|
|
187
|
64
|
188 ngx_pid_t
|
|
189 ngx_execute(ngx_cycle_t *cycle, ngx_exec_ctx_t *ctx)
|
0
|
190 {
|
|
191 return ngx_spawn_process(cycle, ngx_execute_proc, ctx, ctx->name,
|
|
192 NGX_PROCESS_DETACHED);
|
|
193 }
|
|
194
|
|
195
|
64
|
196 static void
|
|
197 ngx_execute_proc(ngx_cycle_t *cycle, void *data)
|
0
|
198 {
|
|
199 ngx_exec_ctx_t *ctx = data;
|
|
200
|
|
201 if (execve(ctx->path, ctx->argv, ctx->envp) == -1) {
|
|
202 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
203 "execve() failed while executing %s \"%s\"",
|
|
204 ctx->name, ctx->path);
|
|
205 }
|
|
206
|
|
207 exit(1);
|
|
208 }
|
|
209
|
|
210
|
64
|
211 void
|
|
212 ngx_process_get_status(void)
|
0
|
213 {
|
|
214 int status;
|
|
215 char *process;
|
|
216 ngx_pid_t pid;
|
|
217 ngx_err_t err;
|
|
218 ngx_int_t i;
|
|
219 ngx_uint_t one;
|
26
|
220
|
0
|
221 one = 0;
|
|
222
|
|
223 for ( ;; ) {
|
|
224 pid = waitpid(-1, &status, WNOHANG);
|
|
225
|
|
226 if (pid == 0) {
|
|
227 return;
|
|
228 }
|
|
229
|
|
230 if (pid == -1) {
|
|
231 err = ngx_errno;
|
|
232
|
|
233 if (err == NGX_EINTR) {
|
|
234 continue;
|
|
235 }
|
|
236
|
|
237 if (err == NGX_ECHILD && one) {
|
|
238 return;
|
|
239 }
|
|
240
|
4
|
241 #if (NGX_SOLARIS)
|
2
|
242
|
|
243 /*
|
|
244 * Solaris always calls the signal handler for each exited process
|
|
245 * despite waitpid() may be already called for this process
|
|
246 */
|
|
247
|
|
248 if (err == NGX_ECHILD) {
|
|
249 ngx_log_error(NGX_LOG_INFO, ngx_cycle->log, errno,
|
|
250 "waitpid() failed");
|
|
251 }
|
|
252
|
|
253 #endif
|
|
254
|
0
|
255 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, errno,
|
|
256 "waitpid() failed");
|
2
|
257
|
0
|
258 return;
|
|
259 }
|
|
260
|
|
261
|
|
262 if (ngx_accept_mutex_ptr) {
|
|
263
|
|
264 /*
|
|
265 * unlock the accept mutex if the abnormally exited process
|
|
266 * held it
|
|
267 */
|
|
268
|
|
269 ngx_atomic_cmp_set(ngx_accept_mutex_ptr, pid, 0);
|
|
270 }
|
|
271
|
|
272
|
|
273 one = 1;
|
|
274 process = "unknown process";
|
|
275
|
|
276 for (i = 0; i < ngx_last_process; i++) {
|
|
277 if (ngx_processes[i].pid == pid) {
|
|
278 ngx_processes[i].status = status;
|
|
279 ngx_processes[i].exited = 1;
|
|
280 process = ngx_processes[i].name;
|
|
281 break;
|
|
282 }
|
|
283 }
|
|
284
|
|
285 if (WTERMSIG(status)) {
|
|
286 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
|
10
|
287 "%s %P exited on signal %d%s",
|
0
|
288 process, pid, WTERMSIG(status),
|
|
289 WCOREDUMP(status) ? " (core dumped)" : "");
|
|
290
|
|
291 } else {
|
26
|
292 ngx_log_error(NGX_LOG_NOTICE, ngx_cycle->log, 0,
|
10
|
293 "%s %P exited with code %d",
|
0
|
294 process, pid, WEXITSTATUS(status));
|
|
295 }
|
|
296
|
|
297 if (WEXITSTATUS(status) == 2 && ngx_processes[i].respawn) {
|
|
298 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
|
10
|
299 "%s %P exited with fatal code %d and could not respawn",
|
|
300 process, pid, WEXITSTATUS(status));
|
0
|
301 ngx_processes[i].respawn = 0;
|
|
302 }
|
|
303 }
|
|
304 }
|
10
|
305
|
|
306
|
64
|
307 void
|
|
308 ngx_debug_point(void)
|
10
|
309 {
|
|
310 ngx_core_conf_t *ccf;
|
|
311
|
|
312 ccf = (ngx_core_conf_t *) ngx_get_conf(ngx_cycle->conf_ctx,
|
|
313 ngx_core_module);
|
|
314
|
|
315 switch (ccf->debug_points) {
|
|
316
|
|
317 case NGX_DEBUG_POINTS_STOP:
|
|
318 raise(SIGSTOP);
|
|
319 break;
|
|
320
|
|
321 case NGX_DEBUG_POINTS_ABORT:
|
|
322 abort();
|
|
323 }
|
|
324 }
|