Mercurial > hg > nginx
annotate src/os/unix/ngx_process.c @ 4311:45272aab5eea
Unlock of shared memory zones on process crash.
If process exited abnormally while holding lock on some shared memory zone -
unlock it. It may be not safe thing to do (as crash with lock held may
result in corrupted shared memory structure, and other processes will
subsequently crash while trying to access shared data), therefore complain
loudly if unlock succeeds.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Wed, 23 Nov 2011 14:09:19 +0000 |
| parents | 3f6040cd731e |
| children | 424a1ac6af43 |
| rev | line source |
|---|---|
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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4 */ |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 #include <ngx_event.h> |
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10 #include <ngx_channel.h> |
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12 |
| 539 | 13 typedef struct { |
| 3681 | 14 int signo; |
| 15 char *signame; | |
| 16 char *name; | |
| 17 void (*handler)(int signo); | |
| 539 | 18 } ngx_signal_t; |
| 19 | |
| 20 | |
| 21 | |
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22 static void ngx_execute_proc(ngx_cycle_t *cycle, void *data); |
| 539 | 23 static void ngx_signal_handler(int signo); |
| 24 static void ngx_process_get_status(void); | |
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25 static void ngx_unlock_mutexes(ngx_pid_t pid); |
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26 |
| 452 | 27 |
| 28 int ngx_argc; | |
| 29 char **ngx_argv; | |
| 30 char **ngx_os_argv; | |
| 31 | |
| 32 ngx_int_t ngx_process_slot; | |
| 33 ngx_socket_t ngx_channel; | |
| 34 ngx_int_t ngx_last_process; | |
| 35 ngx_process_t ngx_processes[NGX_MAX_PROCESSES]; | |
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36 |
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37 |
| 539 | 38 ngx_signal_t signals[] = { |
| 39 { ngx_signal_value(NGX_RECONFIGURE_SIGNAL), | |
| 40 "SIG" ngx_value(NGX_RECONFIGURE_SIGNAL), | |
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41 "reload", |
| 539 | 42 ngx_signal_handler }, |
| 43 | |
| 44 { ngx_signal_value(NGX_REOPEN_SIGNAL), | |
| 45 "SIG" ngx_value(NGX_REOPEN_SIGNAL), | |
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46 "reopen", |
| 539 | 47 ngx_signal_handler }, |
| 48 | |
| 49 { ngx_signal_value(NGX_NOACCEPT_SIGNAL), | |
| 50 "SIG" ngx_value(NGX_NOACCEPT_SIGNAL), | |
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51 "", |
| 539 | 52 ngx_signal_handler }, |
| 53 | |
| 54 { ngx_signal_value(NGX_TERMINATE_SIGNAL), | |
| 55 "SIG" ngx_value(NGX_TERMINATE_SIGNAL), | |
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56 "stop", |
| 539 | 57 ngx_signal_handler }, |
| 58 | |
| 59 { ngx_signal_value(NGX_SHUTDOWN_SIGNAL), | |
| 60 "SIG" ngx_value(NGX_SHUTDOWN_SIGNAL), | |
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61 "quit", |
| 539 | 62 ngx_signal_handler }, |
| 63 | |
| 64 { ngx_signal_value(NGX_CHANGEBIN_SIGNAL), | |
| 65 "SIG" ngx_value(NGX_CHANGEBIN_SIGNAL), | |
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66 "", |
| 539 | 67 ngx_signal_handler }, |
| 68 | |
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69 { SIGALRM, "SIGALRM", "", ngx_signal_handler }, |
| 539 | 70 |
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71 { SIGINT, "SIGINT", "", ngx_signal_handler }, |
| 539 | 72 |
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73 { SIGIO, "SIGIO", "", ngx_signal_handler }, |
| 539 | 74 |
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75 { SIGCHLD, "SIGCHLD", "", ngx_signal_handler }, |
| 539 | 76 |
| 3045 | 77 { SIGSYS, "SIGSYS, SIG_IGN", "", SIG_IGN }, |
| 78 | |
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79 { SIGPIPE, "SIGPIPE, SIG_IGN", "", SIG_IGN }, |
| 539 | 80 |
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81 { 0, NULL, "", NULL } |
| 539 | 82 }; |
| 83 | |
| 84 | |
| 515 | 85 ngx_pid_t |
| 86 ngx_spawn_process(ngx_cycle_t *cycle, ngx_spawn_proc_pt proc, void *data, | |
| 87 char *name, ngx_int_t respawn) | |
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88 { |
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89 u_long on; |
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90 ngx_pid_t pid; |
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91 ngx_int_t s; |
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92 |
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93 if (respawn >= 0) { |
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94 s = respawn; |
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95 |
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96 } else { |
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97 for (s = 0; s < ngx_last_process; s++) { |
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98 if (ngx_processes[s].pid == -1) { |
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99 break; |
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100 } |
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101 } |
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102 |
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103 if (s == NGX_MAX_PROCESSES) { |
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104 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, |
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105 "no more than %d processes can be spawned", |
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106 NGX_MAX_PROCESSES); |
| 543 | 107 return NGX_INVALID_PID; |
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108 } |
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109 } |
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110 |
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111 |
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112 if (respawn != NGX_PROCESS_DETACHED) { |
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113 |
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114 /* Solaris 9 still has no AF_LOCAL */ |
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115 |
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116 if (socketpair(AF_UNIX, SOCK_STREAM, 0, ngx_processes[s].channel) == -1) |
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117 { |
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118 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
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119 "socketpair() failed while spawning \"%s\"", name); |
| 543 | 120 return NGX_INVALID_PID; |
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121 } |
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122 |
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123 ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0, |
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124 "channel %d:%d", |
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125 ngx_processes[s].channel[0], |
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126 ngx_processes[s].channel[1]); |
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127 |
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128 if (ngx_nonblocking(ngx_processes[s].channel[0]) == -1) { |
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129 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
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130 ngx_nonblocking_n " failed while spawning \"%s\"", |
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131 name); |
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132 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
| 543 | 133 return NGX_INVALID_PID; |
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134 } |
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135 |
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136 if (ngx_nonblocking(ngx_processes[s].channel[1]) == -1) { |
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137 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
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138 ngx_nonblocking_n " failed while spawning \"%s\"", |
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139 name); |
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140 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
| 543 | 141 return NGX_INVALID_PID; |
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142 } |
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143 |
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144 on = 1; |
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145 if (ioctl(ngx_processes[s].channel[0], FIOASYNC, &on) == -1) { |
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146 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
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147 "ioctl(FIOASYNC) failed while spawning \"%s\"", name); |
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148 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
| 543 | 149 return NGX_INVALID_PID; |
|
365
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
150 } |
|
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
151 |
|
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
152 if (fcntl(ngx_processes[s].channel[0], F_SETOWN, ngx_pid) == -1) { |
|
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
153 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
|
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
154 "fcntl(F_SETOWN) failed while spawning \"%s\"", name); |
|
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
155 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
| 543 | 156 return NGX_INVALID_PID; |
|
365
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
157 } |
|
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
158 |
|
366
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
159 if (fcntl(ngx_processes[s].channel[0], F_SETFD, FD_CLOEXEC) == -1) { |
|
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
160 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
|
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
161 "fcntl(FD_CLOEXEC) failed while spawning \"%s\"", |
|
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
162 name); |
|
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
163 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
| 543 | 164 return NGX_INVALID_PID; |
|
366
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
165 } |
|
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
166 |
|
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
167 if (fcntl(ngx_processes[s].channel[1], F_SETFD, FD_CLOEXEC) == -1) { |
|
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
168 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
|
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
169 "fcntl(FD_CLOEXEC) failed while spawning \"%s\"", |
|
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
170 name); |
|
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
171 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
| 543 | 172 return NGX_INVALID_PID; |
|
366
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
173 } |
|
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
174 |
|
365
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
175 ngx_channel = ngx_processes[s].channel[1]; |
|
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
176 |
|
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
177 } else { |
|
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
178 ngx_processes[s].channel[0] = -1; |
|
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
179 ngx_processes[s].channel[1] = -1; |
|
360
239e37d44a34
nginx-0.0.7-2004-06-18-20:22:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
355
diff
changeset
|
180 } |
|
239e37d44a34
nginx-0.0.7-2004-06-18-20:22:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
355
diff
changeset
|
181 |
|
239e37d44a34
nginx-0.0.7-2004-06-18-20:22:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
355
diff
changeset
|
182 ngx_process_slot = s; |
|
354
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
183 |
|
191
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
184 |
|
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
185 pid = fork(); |
|
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
186 |
|
354
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
187 switch (pid) { |
|
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
188 |
|
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
189 case -1: |
|
218
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
190 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
|
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
191 "fork() failed while spawning \"%s\"", name); |
|
365
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
192 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
| 543 | 193 return NGX_INVALID_PID; |
|
191
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
194 |
|
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
195 case 0: |
|
249
2a0540287298
nginx-0.0.2-2004-02-03-19:43:54 import
Igor Sysoev <igor@sysoev.ru>
parents:
248
diff
changeset
|
196 ngx_pid = ngx_getpid(); |
|
218
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
197 proc(cycle, data); |
|
191
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
198 break; |
|
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
199 |
|
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
200 default: |
|
195
8dee38ea9117
nginx-0.0.1-2003-11-25-23:44:56 import
Igor Sysoev <igor@sysoev.ru>
parents:
191
diff
changeset
|
201 break; |
|
191
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
202 } |
|
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
203 |
| 477 | 204 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "start %s %P", name, pid); |
|
218
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
205 |
|
354
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
206 ngx_processes[s].pid = pid; |
|
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
207 ngx_processes[s].exited = 0; |
|
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
208 |
|
218
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
209 if (respawn >= 0) { |
|
225
2e9a8a14a0cf
nginx-0.0.1-2004-01-13-19:43:23 import
Igor Sysoev <igor@sysoev.ru>
parents:
224
diff
changeset
|
210 return pid; |
|
218
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
211 } |
|
191
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
212 |
|
354
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
213 ngx_processes[s].proc = proc; |
|
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
214 ngx_processes[s].data = data; |
|
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
215 ngx_processes[s].name = name; |
|
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
216 ngx_processes[s].exiting = 0; |
|
318
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
217 |
|
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
218 switch (respawn) { |
|
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
219 |
|
3016
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
220 case NGX_PROCESS_NORESPAWN: |
|
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
221 ngx_processes[s].respawn = 0; |
|
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
222 ngx_processes[s].just_spawn = 0; |
|
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
223 ngx_processes[s].detached = 0; |
|
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
224 break; |
|
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
225 |
|
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
226 case NGX_PROCESS_JUST_SPAWN: |
|
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
227 ngx_processes[s].respawn = 0; |
|
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
228 ngx_processes[s].just_spawn = 1; |
|
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
229 ngx_processes[s].detached = 0; |
|
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
230 break; |
|
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
231 |
|
318
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
232 case NGX_PROCESS_RESPAWN: |
|
354
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
233 ngx_processes[s].respawn = 1; |
|
3016
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
234 ngx_processes[s].just_spawn = 0; |
|
354
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
235 ngx_processes[s].detached = 0; |
|
318
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
236 break; |
|
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
237 |
|
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
238 case NGX_PROCESS_JUST_RESPAWN: |
|
354
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
239 ngx_processes[s].respawn = 1; |
|
3016
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
240 ngx_processes[s].just_spawn = 1; |
|
354
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
241 ngx_processes[s].detached = 0; |
|
318
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
242 break; |
|
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
243 |
|
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
244 case NGX_PROCESS_DETACHED: |
|
354
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
245 ngx_processes[s].respawn = 0; |
|
3016
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
246 ngx_processes[s].just_spawn = 0; |
|
354
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
247 ngx_processes[s].detached = 1; |
|
318
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
248 break; |
|
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
249 } |
|
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
250 |
|
389
537de4dca8ca
nginx-0.0.7-2004-07-13-21:59:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
366
diff
changeset
|
251 if (s == ngx_last_process) { |
|
537de4dca8ca
nginx-0.0.7-2004-07-13-21:59:12 import
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252 ngx_last_process++; |
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253 } |
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191
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254 |
|
225
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255 return pid; |
|
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256 } |
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257 |
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258 |
| 515 | 259 ngx_pid_t |
| 260 ngx_execute(ngx_cycle_t *cycle, ngx_exec_ctx_t *ctx) | |
|
218
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261 { |
|
279
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262 return ngx_spawn_process(cycle, ngx_execute_proc, ctx, ctx->name, |
|
226
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263 NGX_PROCESS_DETACHED); |
|
191
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264 } |
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265 |
|
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266 |
| 515 | 267 static void |
| 268 ngx_execute_proc(ngx_cycle_t *cycle, void *data) | |
|
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269 { |
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270 ngx_exec_ctx_t *ctx = data; |
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271 |
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272 if (execve(ctx->path, ctx->argv, ctx->envp) == -1) { |
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273 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
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274 "execve() failed while executing %s \"%s\"", |
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275 ctx->name, ctx->path); |
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276 } |
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277 |
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278 exit(1); |
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279 } |
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280 |
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281 |
| 539 | 282 ngx_int_t |
| 283 ngx_init_signals(ngx_log_t *log) | |
| 284 { | |
| 285 ngx_signal_t *sig; | |
| 286 struct sigaction sa; | |
| 287 | |
| 288 for (sig = signals; sig->signo != 0; sig++) { | |
| 289 ngx_memzero(&sa, sizeof(struct sigaction)); | |
| 290 sa.sa_handler = sig->handler; | |
| 291 sigemptyset(&sa.sa_mask); | |
| 292 if (sigaction(sig->signo, &sa, NULL) == -1) { | |
| 293 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, | |
| 294 "sigaction(%s) failed", sig->signame); | |
| 295 return NGX_ERROR; | |
| 296 } | |
| 297 } | |
| 298 | |
| 299 return NGX_OK; | |
| 300 } | |
| 301 | |
| 302 | |
| 515 | 303 void |
| 539 | 304 ngx_signal_handler(int signo) |
| 305 { | |
| 306 char *action; | |
| 307 ngx_int_t ignore; | |
| 308 ngx_err_t err; | |
| 309 ngx_signal_t *sig; | |
| 310 | |
| 311 ignore = 0; | |
| 312 | |
| 313 err = ngx_errno; | |
| 314 | |
| 315 for (sig = signals; sig->signo != 0; sig++) { | |
| 316 if (sig->signo == signo) { | |
| 317 break; | |
| 318 } | |
| 319 } | |
| 320 | |
|
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321 ngx_time_sigsafe_update(); |
| 539 | 322 |
| 323 action = ""; | |
| 324 | |
| 325 switch (ngx_process) { | |
| 326 | |
| 327 case NGX_PROCESS_MASTER: | |
| 328 case NGX_PROCESS_SINGLE: | |
| 329 switch (signo) { | |
| 330 | |
| 331 case ngx_signal_value(NGX_SHUTDOWN_SIGNAL): | |
| 332 ngx_quit = 1; | |
| 333 action = ", shutting down"; | |
| 334 break; | |
| 335 | |
| 336 case ngx_signal_value(NGX_TERMINATE_SIGNAL): | |
| 337 case SIGINT: | |
| 338 ngx_terminate = 1; | |
| 339 action = ", exiting"; | |
| 340 break; | |
| 341 | |
| 342 case ngx_signal_value(NGX_NOACCEPT_SIGNAL): | |
|
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343 if (ngx_daemonized) { |
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344 ngx_noaccept = 1; |
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345 action = ", stop accepting connections"; |
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346 } |
| 539 | 347 break; |
| 348 | |
| 349 case ngx_signal_value(NGX_RECONFIGURE_SIGNAL): | |
| 350 ngx_reconfigure = 1; | |
| 351 action = ", reconfiguring"; | |
| 352 break; | |
| 353 | |
| 354 case ngx_signal_value(NGX_REOPEN_SIGNAL): | |
| 355 ngx_reopen = 1; | |
| 356 action = ", reopening logs"; | |
| 357 break; | |
| 358 | |
| 359 case ngx_signal_value(NGX_CHANGEBIN_SIGNAL): | |
| 360 if (getppid() > 1 || ngx_new_binary > 0) { | |
| 361 | |
| 362 /* | |
| 363 * Ignore the signal in the new binary if its parent is | |
| 364 * not the init process, i.e. the old binary's process | |
| 698 | 365 * is still running. Or ignore the signal in the old binary's |
| 539 | 366 * process if the new binary's process is already running. |
| 367 */ | |
| 368 | |
| 369 action = ", ignoring"; | |
| 370 ignore = 1; | |
| 371 break; | |
| 372 } | |
| 373 | |
| 374 ngx_change_binary = 1; | |
| 375 action = ", changing binary"; | |
| 376 break; | |
| 377 | |
| 378 case SIGALRM: | |
|
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379 ngx_sigalrm = 1; |
| 539 | 380 break; |
| 381 | |
| 382 case SIGIO: | |
| 383 ngx_sigio = 1; | |
| 384 break; | |
| 385 | |
| 386 case SIGCHLD: | |
| 387 ngx_reap = 1; | |
| 388 break; | |
| 389 } | |
| 390 | |
| 391 break; | |
| 392 | |
| 393 case NGX_PROCESS_WORKER: | |
|
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394 case NGX_PROCESS_HELPER: |
| 539 | 395 switch (signo) { |
| 396 | |
| 397 case ngx_signal_value(NGX_NOACCEPT_SIGNAL): | |
|
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398 if (!ngx_daemonized) { |
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399 break; |
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400 } |
| 539 | 401 ngx_debug_quit = 1; |
| 402 case ngx_signal_value(NGX_SHUTDOWN_SIGNAL): | |
| 403 ngx_quit = 1; | |
| 404 action = ", shutting down"; | |
| 405 break; | |
| 406 | |
| 407 case ngx_signal_value(NGX_TERMINATE_SIGNAL): | |
| 408 case SIGINT: | |
| 409 ngx_terminate = 1; | |
| 410 action = ", exiting"; | |
| 411 break; | |
| 412 | |
| 413 case ngx_signal_value(NGX_REOPEN_SIGNAL): | |
| 414 ngx_reopen = 1; | |
| 415 action = ", reopening logs"; | |
| 416 break; | |
| 417 | |
| 418 case ngx_signal_value(NGX_RECONFIGURE_SIGNAL): | |
| 419 case ngx_signal_value(NGX_CHANGEBIN_SIGNAL): | |
| 420 case SIGIO: | |
| 421 action = ", ignoring"; | |
| 422 break; | |
| 423 } | |
| 424 | |
| 425 break; | |
| 426 } | |
| 427 | |
| 428 ngx_log_error(NGX_LOG_NOTICE, ngx_cycle->log, 0, | |
| 429 "signal %d (%s) received%s", signo, sig->signame, action); | |
| 430 | |
| 431 if (ignore) { | |
| 432 ngx_log_error(NGX_LOG_CRIT, ngx_cycle->log, 0, | |
| 433 "the changing binary signal is ignored: " | |
| 434 "you should shutdown or terminate " | |
| 435 "before either old or new binary's process"); | |
| 436 } | |
| 437 | |
| 438 if (signo == SIGCHLD) { | |
| 439 ngx_process_get_status(); | |
| 440 } | |
| 441 | |
| 442 ngx_set_errno(err); | |
| 443 } | |
| 444 | |
| 445 | |
| 446 static void | |
| 515 | 447 ngx_process_get_status(void) |
|
218
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448 { |
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449 int status; |
|
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450 char *process; |
|
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451 ngx_pid_t pid; |
|
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452 ngx_err_t err; |
|
354
eaf1f651cf86
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318
diff
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|
453 ngx_int_t i; |
|
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318
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|
454 ngx_uint_t one; |
| 477 | 455 |
|
191
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|
456 one = 0; |
|
71ce40b3c37b
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|
457 |
|
71ce40b3c37b
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|
458 for ( ;; ) { |
|
71ce40b3c37b
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diff
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|
459 pid = waitpid(-1, &status, WNOHANG); |
|
71ce40b3c37b
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parents:
diff
changeset
|
460 |
|
71ce40b3c37b
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diff
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|
461 if (pid == 0) { |
|
71ce40b3c37b
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|
462 return; |
|
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|
463 } |
|
71ce40b3c37b
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diff
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|
464 |
|
71ce40b3c37b
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parents:
diff
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|
465 if (pid == -1) { |
|
71ce40b3c37b
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diff
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|
466 err = ngx_errno; |
|
71ce40b3c37b
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parents:
diff
changeset
|
467 |
|
71ce40b3c37b
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parents:
diff
changeset
|
468 if (err == NGX_EINTR) { |
|
71ce40b3c37b
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parents:
diff
changeset
|
469 continue; |
|
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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parents:
diff
changeset
|
470 } |
|
71ce40b3c37b
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parents:
diff
changeset
|
471 |
|
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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parents:
diff
changeset
|
472 if (err == NGX_ECHILD && one) { |
|
71ce40b3c37b
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|
473 return; |
|
71ce40b3c37b
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|
474 } |
|
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diff
changeset
|
475 |
|
943
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lower the log level of the waitpid() ENOCHILD error on FreeBSD
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parents:
698
diff
changeset
|
476 #if (NGX_SOLARIS || NGX_FREEBSD) |
| 452 | 477 |
| 478 /* | |
| 479 * Solaris always calls the signal handler for each exited process | |
|
943
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698
diff
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|
480 * despite waitpid() may be already called for this process. |
|
cbe0292e53b3
lower the log level of the waitpid() ENOCHILD error on FreeBSD
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diff
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|
481 * |
|
cbe0292e53b3
lower the log level of the waitpid() ENOCHILD error on FreeBSD
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698
diff
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|
482 * When several processes exit at the same time FreeBSD may |
|
cbe0292e53b3
lower the log level of the waitpid() ENOCHILD error on FreeBSD
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parents:
698
diff
changeset
|
483 * erroneously call the signal handler for exited process |
| 1963 | 484 * despite waitpid() may be already called for this process. |
| 452 | 485 */ |
| 486 | |
| 487 if (err == NGX_ECHILD) { | |
|
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3681
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|
488 ngx_log_error(NGX_LOG_INFO, ngx_cycle->log, err, |
|
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use copied strerror() messages and autoconfigured sys_nerr value
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diff
changeset
|
489 "waitpid() failed"); |
| 563 | 490 return; |
| 452 | 491 } |
| 492 | |
| 493 #endif | |
| 494 | |
|
3787
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use copied strerror() messages and autoconfigured sys_nerr value
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diff
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|
495 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, err, |
|
e294f37401c0
use copied strerror() messages and autoconfigured sys_nerr value
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3681
diff
changeset
|
496 "waitpid() failed"); |
|
191
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|
497 return; |
|
71ce40b3c37b
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|
498 } |
|
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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parents:
diff
changeset
|
499 |
|
306
6b91bfbc4123
nginx-0.0.3-2004-04-05-00:32:09 import
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279
diff
changeset
|
500 |
|
191
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|
501 one = 1; |
|
389
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366
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|
502 process = "unknown process"; |
|
191
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503 |
|
218
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504 for (i = 0; i < ngx_last_process; i++) { |
|
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505 if (ngx_processes[i].pid == pid) { |
|
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506 ngx_processes[i].status = status; |
|
222
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507 ngx_processes[i].exited = 1; |
|
218
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508 process = ngx_processes[i].name; |
|
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509 break; |
|
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510 } |
|
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511 } |
|
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512 |
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513 if (WTERMSIG(status)) { |
| 2494 | 514 #ifdef WCOREDUMP |
|
218
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515 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, |
| 461 | 516 "%s %P exited on signal %d%s", |
|
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517 process, pid, WTERMSIG(status), |
|
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518 WCOREDUMP(status) ? " (core dumped)" : ""); |
| 2494 | 519 #else |
| 520 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, | |
| 521 "%s %P exited on signal %d", | |
| 522 process, pid, WTERMSIG(status)); | |
| 523 #endif | |
|
218
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524 |
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525 } else { |
| 477 | 526 ngx_log_error(NGX_LOG_NOTICE, ngx_cycle->log, 0, |
| 461 | 527 "%s %P exited with code %d", |
|
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528 process, pid, WEXITSTATUS(status)); |
|
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529 } |
|
234
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530 |
|
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531 if (WEXITSTATUS(status) == 2 && ngx_processes[i].respawn) { |
|
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532 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, |
| 1963 | 533 "%s %P exited with fatal code %d " |
|
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|
534 "and cannot be respawned", |
| 1963 | 535 process, pid, WEXITSTATUS(status)); |
|
234
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536 ngx_processes[i].respawn = 0; |
|
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537 } |
|
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538 |
|
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539 ngx_unlock_mutexes(pid); |
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540 } |
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541 } |
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542 |
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543 |
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|
544 static void |
|
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545 ngx_unlock_mutexes(ngx_pid_t pid) |
|
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546 { |
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547 ngx_uint_t i; |
|
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548 ngx_shm_zone_t *shm_zone; |
|
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549 ngx_list_part_t *part; |
|
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550 ngx_slab_pool_t *sp; |
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551 |
|
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552 /* |
|
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553 * unlock the accept mutex if the abnormally exited process |
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554 * held it |
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555 */ |
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556 |
|
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|
557 if (ngx_accept_mutex_ptr) { |
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558 ngx_shmtx_force_unlock(&ngx_accept_mutex, pid); |
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559 } |
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560 |
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561 /* |
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562 * unlock shared memory mutexes if held by the abnormally exited |
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563 * process |
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564 */ |
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565 |
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566 part = (ngx_list_part_t *) &ngx_cycle->shared_memory.part; |
|
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567 shm_zone = part->elts; |
|
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|
568 |
|
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|
569 for (i = 0; /* void */ ; i++) { |
|
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570 |
|
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571 if (i >= part->nelts) { |
|
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572 if (part->next == NULL) { |
|
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573 break; |
|
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|
574 } |
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|
575 part = part->next; |
|
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|
576 shm_zone = part->elts; |
|
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|
577 i = 0; |
|
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|
578 } |
|
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|
579 |
|
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|
580 sp = (ngx_slab_pool_t *) shm_zone[i].shm.addr; |
|
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|
581 |
|
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|
582 if (ngx_shmtx_force_unlock(&sp->mutex, pid)) { |
|
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|
583 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, |
|
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|
584 "shared memory zone \"%V\" was locked by %P", |
|
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|
585 &shm_zone[i].shm.name, pid); |
|
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|
586 } |
|
191
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parents:
diff
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|
587 } |
|
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parents:
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|
588 } |
| 461 | 589 |
| 590 | |
| 515 | 591 void |
| 592 ngx_debug_point(void) | |
| 461 | 593 { |
| 594 ngx_core_conf_t *ccf; | |
| 595 | |
| 596 ccf = (ngx_core_conf_t *) ngx_get_conf(ngx_cycle->conf_ctx, | |
| 597 ngx_core_module); | |
| 598 | |
| 599 switch (ccf->debug_points) { | |
| 600 | |
| 601 case NGX_DEBUG_POINTS_STOP: | |
| 602 raise(SIGSTOP); | |
| 603 break; | |
| 604 | |
| 605 case NGX_DEBUG_POINTS_ABORT: | |
| 563 | 606 ngx_abort(); |
| 461 | 607 } |
| 608 } | |
|
2738
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implement "-s signal" option for Unix
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|
609 |
|
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|
610 |
|
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|
611 ngx_int_t |
|
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|
612 ngx_os_signal_process(ngx_cycle_t *cycle, char *name, ngx_int_t pid) |
|
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|
613 { |
|
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|
614 ngx_signal_t *sig; |
|
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diff
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|
615 |
|
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diff
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|
616 for (sig = signals; sig->signo != 0; sig++) { |
|
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|
617 if (ngx_strcmp(name, sig->name) == 0) { |
|
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parents:
2494
diff
changeset
|
618 if (kill(pid, sig->signo) != -1) { |
|
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2494
diff
changeset
|
619 return 0; |
|
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|
620 } |
|
ae81441e23f4
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|
621 |
|
ae81441e23f4
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|
622 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
|
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diff
changeset
|
623 "kill(%P, %d) failed", pid, sig->signo); |
|
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Igor Sysoev <igor@sysoev.ru>
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2494
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changeset
|
624 } |
|
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2494
diff
changeset
|
625 } |
|
ae81441e23f4
implement "-s signal" option for Unix
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changeset
|
626 |
|
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|
627 return 1; |
|
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|
628 } |