Mercurial > hg > nginx
annotate src/os/unix/ngx_process.c @ 4237:378c297bb745 release-1.1.7
nginx-1.1.7-RELEASE
author | Igor Sysoev <igor@sysoev.ru> |
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date | Mon, 31 Oct 2011 14:52:46 +0000 |
parents | 59b99f217c6d |
children | 3f6040cd731e 4919fb357a5d |
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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11 |
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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); | |
218
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25 |
452 | 26 |
27 int ngx_argc; | |
28 char **ngx_argv; | |
29 char **ngx_os_argv; | |
30 | |
31 ngx_int_t ngx_process_slot; | |
32 ngx_socket_t ngx_channel; | |
33 ngx_int_t ngx_last_process; | |
34 ngx_process_t ngx_processes[NGX_MAX_PROCESSES]; | |
191
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35 |
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36 |
539 | 37 ngx_signal_t signals[] = { |
38 { ngx_signal_value(NGX_RECONFIGURE_SIGNAL), | |
39 "SIG" ngx_value(NGX_RECONFIGURE_SIGNAL), | |
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40 "reload", |
539 | 41 ngx_signal_handler }, |
42 | |
43 { ngx_signal_value(NGX_REOPEN_SIGNAL), | |
44 "SIG" ngx_value(NGX_REOPEN_SIGNAL), | |
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45 "reopen", |
539 | 46 ngx_signal_handler }, |
47 | |
48 { ngx_signal_value(NGX_NOACCEPT_SIGNAL), | |
49 "SIG" ngx_value(NGX_NOACCEPT_SIGNAL), | |
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50 "", |
539 | 51 ngx_signal_handler }, |
52 | |
53 { ngx_signal_value(NGX_TERMINATE_SIGNAL), | |
54 "SIG" ngx_value(NGX_TERMINATE_SIGNAL), | |
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55 "stop", |
539 | 56 ngx_signal_handler }, |
57 | |
58 { ngx_signal_value(NGX_SHUTDOWN_SIGNAL), | |
59 "SIG" ngx_value(NGX_SHUTDOWN_SIGNAL), | |
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60 "quit", |
539 | 61 ngx_signal_handler }, |
62 | |
63 { ngx_signal_value(NGX_CHANGEBIN_SIGNAL), | |
64 "SIG" ngx_value(NGX_CHANGEBIN_SIGNAL), | |
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65 "", |
539 | 66 ngx_signal_handler }, |
67 | |
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68 { SIGALRM, "SIGALRM", "", ngx_signal_handler }, |
539 | 69 |
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70 { SIGINT, "SIGINT", "", ngx_signal_handler }, |
539 | 71 |
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72 { SIGIO, "SIGIO", "", ngx_signal_handler }, |
539 | 73 |
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74 { SIGCHLD, "SIGCHLD", "", ngx_signal_handler }, |
539 | 75 |
3045 | 76 { SIGSYS, "SIGSYS, SIG_IGN", "", SIG_IGN }, |
77 | |
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78 { SIGPIPE, "SIGPIPE, SIG_IGN", "", SIG_IGN }, |
539 | 79 |
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80 { 0, NULL, "", NULL } |
539 | 81 }; |
82 | |
83 | |
515 | 84 ngx_pid_t |
85 ngx_spawn_process(ngx_cycle_t *cycle, ngx_spawn_proc_pt proc, void *data, | |
86 char *name, ngx_int_t respawn) | |
191
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87 { |
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88 u_long on; |
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89 ngx_pid_t pid; |
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90 ngx_int_t s; |
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91 |
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92 if (respawn >= 0) { |
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93 s = respawn; |
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94 |
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95 } else { |
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96 for (s = 0; s < ngx_last_process; s++) { |
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97 if (ngx_processes[s].pid == -1) { |
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98 break; |
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99 } |
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100 } |
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101 |
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102 if (s == NGX_MAX_PROCESSES) { |
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103 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, |
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104 "no more than %d processes can be spawned", |
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105 NGX_MAX_PROCESSES); |
543 | 106 return NGX_INVALID_PID; |
389
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107 } |
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108 } |
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109 |
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110 |
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111 if (respawn != NGX_PROCESS_DETACHED) { |
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112 |
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113 /* Solaris 9 still has no AF_LOCAL */ |
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114 |
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115 if (socketpair(AF_UNIX, SOCK_STREAM, 0, ngx_processes[s].channel) == -1) |
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116 { |
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117 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
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118 "socketpair() failed while spawning \"%s\"", name); |
543 | 119 return NGX_INVALID_PID; |
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120 } |
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121 |
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122 ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0, |
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123 "channel %d:%d", |
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124 ngx_processes[s].channel[0], |
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125 ngx_processes[s].channel[1]); |
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126 |
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127 if (ngx_nonblocking(ngx_processes[s].channel[0]) == -1) { |
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128 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
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129 ngx_nonblocking_n " failed while spawning \"%s\"", |
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130 name); |
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131 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
543 | 132 return NGX_INVALID_PID; |
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133 } |
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134 |
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135 if (ngx_nonblocking(ngx_processes[s].channel[1]) == -1) { |
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136 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
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137 ngx_nonblocking_n " failed while spawning \"%s\"", |
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138 name); |
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139 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
543 | 140 return NGX_INVALID_PID; |
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141 } |
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142 |
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143 on = 1; |
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144 if (ioctl(ngx_processes[s].channel[0], FIOASYNC, &on) == -1) { |
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145 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
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146 "ioctl(FIOASYNC) failed while spawning \"%s\"", name); |
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147 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
543 | 148 return NGX_INVALID_PID; |
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149 } |
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150 |
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151 if (fcntl(ngx_processes[s].channel[0], F_SETOWN, ngx_pid) == -1) { |
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152 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
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153 "fcntl(F_SETOWN) failed while spawning \"%s\"", name); |
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nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
154 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
543 | 155 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
|
156 } |
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
157 |
366
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
158 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
|
159 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
|
160 "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
|
161 name); |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
162 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
543 | 163 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
|
164 } |
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 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
|
167 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
|
168 "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
|
169 name); |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
170 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
543 | 171 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
|
172 } |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
173 |
365
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
174 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
|
175 |
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
176 } else { |
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
177 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
|
178 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
|
179 } |
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 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
|
182 |
191
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
183 |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
184 pid = fork(); |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
185 |
354
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
186 switch (pid) { |
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
187 |
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
188 case -1: |
218
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
189 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
|
190 "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
|
191 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
543 | 192 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
|
193 |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
194 case 0: |
249
2a0540287298
nginx-0.0.2-2004-02-03-19:43:54 import
Igor Sysoev <igor@sysoev.ru>
parents:
248
diff
changeset
|
195 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
|
196 proc(cycle, data); |
191
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
197 break; |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
198 |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
199 default: |
195
8dee38ea9117
nginx-0.0.1-2003-11-25-23:44:56 import
Igor Sysoev <igor@sysoev.ru>
parents:
191
diff
changeset
|
200 break; |
191
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
201 } |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
202 |
477 | 203 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
|
204 |
354
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
205 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
|
206 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
|
207 |
218
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
208 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
|
209 return pid; |
218
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
210 } |
191
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
211 |
354
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
212 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
|
213 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
|
214 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
|
215 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
|
216 |
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
217 switch (respawn) { |
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
218 |
3016
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
219 case NGX_PROCESS_NORESPAWN: |
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
220 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
|
221 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
|
222 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
|
223 break; |
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
224 |
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
225 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
|
226 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
|
227 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
|
228 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
|
229 break; |
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
230 |
318
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
231 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
|
232 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
|
233 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
|
234 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
|
235 break; |
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
236 |
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
237 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
|
238 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
|
239 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
|
240 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
|
241 break; |
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
242 |
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
243 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
|
244 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
|
245 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
|
246 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
|
247 break; |
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
248 } |
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
249 |
389
537de4dca8ca
nginx-0.0.7-2004-07-13-21:59:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
366
diff
changeset
|
250 if (s == ngx_last_process) { |
537de4dca8ca
nginx-0.0.7-2004-07-13-21:59:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
366
diff
changeset
|
251 ngx_last_process++; |
537de4dca8ca
nginx-0.0.7-2004-07-13-21:59:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
366
diff
changeset
|
252 } |
191
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
253 |
225
2e9a8a14a0cf
nginx-0.0.1-2004-01-13-19:43:23 import
Igor Sysoev <igor@sysoev.ru>
parents:
224
diff
changeset
|
254 return pid; |
218
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
255 } |
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
256 |
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
257 |
515 | 258 ngx_pid_t |
259 ngx_execute(ngx_cycle_t *cycle, ngx_exec_ctx_t *ctx) | |
218
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
260 { |
279
b79f021a644a
nginx-0.0.2-2004-03-04-19:34:23 import
Igor Sysoev <igor@sysoev.ru>
parents:
272
diff
changeset
|
261 return ngx_spawn_process(cycle, ngx_execute_proc, ctx, ctx->name, |
226
b0c1e21e68db
nginx-0.0.1-2004-01-14-00:33:59 import
Igor Sysoev <igor@sysoev.ru>
parents:
225
diff
changeset
|
262 NGX_PROCESS_DETACHED); |
191
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263 } |
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264 |
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265 |
515 | 266 static void |
267 ngx_execute_proc(ngx_cycle_t *cycle, void *data) | |
218
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268 { |
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269 ngx_exec_ctx_t *ctx = data; |
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270 |
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271 if (execve(ctx->path, ctx->argv, ctx->envp) == -1) { |
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272 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
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273 "execve() failed while executing %s \"%s\"", |
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274 ctx->name, ctx->path); |
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275 } |
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276 |
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277 exit(1); |
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278 } |
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279 |
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280 |
539 | 281 ngx_int_t |
282 ngx_init_signals(ngx_log_t *log) | |
283 { | |
284 ngx_signal_t *sig; | |
285 struct sigaction sa; | |
286 | |
287 for (sig = signals; sig->signo != 0; sig++) { | |
288 ngx_memzero(&sa, sizeof(struct sigaction)); | |
289 sa.sa_handler = sig->handler; | |
290 sigemptyset(&sa.sa_mask); | |
291 if (sigaction(sig->signo, &sa, NULL) == -1) { | |
292 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, | |
293 "sigaction(%s) failed", sig->signame); | |
294 return NGX_ERROR; | |
295 } | |
296 } | |
297 | |
298 return NGX_OK; | |
299 } | |
300 | |
301 | |
515 | 302 void |
539 | 303 ngx_signal_handler(int signo) |
304 { | |
305 char *action; | |
306 ngx_int_t ignore; | |
307 ngx_err_t err; | |
308 ngx_signal_t *sig; | |
309 | |
310 ignore = 0; | |
311 | |
312 err = ngx_errno; | |
313 | |
314 for (sig = signals; sig->signo != 0; sig++) { | |
315 if (sig->signo == signo) { | |
316 break; | |
317 } | |
318 } | |
319 | |
3475
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320 ngx_time_sigsafe_update(); |
539 | 321 |
322 action = ""; | |
323 | |
324 switch (ngx_process) { | |
325 | |
326 case NGX_PROCESS_MASTER: | |
327 case NGX_PROCESS_SINGLE: | |
328 switch (signo) { | |
329 | |
330 case ngx_signal_value(NGX_SHUTDOWN_SIGNAL): | |
331 ngx_quit = 1; | |
332 action = ", shutting down"; | |
333 break; | |
334 | |
335 case ngx_signal_value(NGX_TERMINATE_SIGNAL): | |
336 case SIGINT: | |
337 ngx_terminate = 1; | |
338 action = ", exiting"; | |
339 break; | |
340 | |
341 case ngx_signal_value(NGX_NOACCEPT_SIGNAL): | |
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342 if (ngx_daemonized) { |
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343 ngx_noaccept = 1; |
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344 action = ", stop accepting connections"; |
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345 } |
539 | 346 break; |
347 | |
348 case ngx_signal_value(NGX_RECONFIGURE_SIGNAL): | |
349 ngx_reconfigure = 1; | |
350 action = ", reconfiguring"; | |
351 break; | |
352 | |
353 case ngx_signal_value(NGX_REOPEN_SIGNAL): | |
354 ngx_reopen = 1; | |
355 action = ", reopening logs"; | |
356 break; | |
357 | |
358 case ngx_signal_value(NGX_CHANGEBIN_SIGNAL): | |
359 if (getppid() > 1 || ngx_new_binary > 0) { | |
360 | |
361 /* | |
362 * Ignore the signal in the new binary if its parent is | |
363 * not the init process, i.e. the old binary's process | |
698 | 364 * is still running. Or ignore the signal in the old binary's |
539 | 365 * process if the new binary's process is already running. |
366 */ | |
367 | |
368 action = ", ignoring"; | |
369 ignore = 1; | |
370 break; | |
371 } | |
372 | |
373 ngx_change_binary = 1; | |
374 action = ", changing binary"; | |
375 break; | |
376 | |
377 case SIGALRM: | |
3048
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378 ngx_sigalrm = 1; |
539 | 379 break; |
380 | |
381 case SIGIO: | |
382 ngx_sigio = 1; | |
383 break; | |
384 | |
385 case SIGCHLD: | |
386 ngx_reap = 1; | |
387 break; | |
388 } | |
389 | |
390 break; | |
391 | |
392 case NGX_PROCESS_WORKER: | |
3358
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393 case NGX_PROCESS_HELPER: |
539 | 394 switch (signo) { |
395 | |
396 case ngx_signal_value(NGX_NOACCEPT_SIGNAL): | |
4019
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397 if (!ngx_daemonized) { |
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398 break; |
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399 } |
539 | 400 ngx_debug_quit = 1; |
401 case ngx_signal_value(NGX_SHUTDOWN_SIGNAL): | |
402 ngx_quit = 1; | |
403 action = ", shutting down"; | |
404 break; | |
405 | |
406 case ngx_signal_value(NGX_TERMINATE_SIGNAL): | |
407 case SIGINT: | |
408 ngx_terminate = 1; | |
409 action = ", exiting"; | |
410 break; | |
411 | |
412 case ngx_signal_value(NGX_REOPEN_SIGNAL): | |
413 ngx_reopen = 1; | |
414 action = ", reopening logs"; | |
415 break; | |
416 | |
417 case ngx_signal_value(NGX_RECONFIGURE_SIGNAL): | |
418 case ngx_signal_value(NGX_CHANGEBIN_SIGNAL): | |
419 case SIGIO: | |
420 action = ", ignoring"; | |
421 break; | |
422 } | |
423 | |
424 break; | |
425 } | |
426 | |
427 ngx_log_error(NGX_LOG_NOTICE, ngx_cycle->log, 0, | |
428 "signal %d (%s) received%s", signo, sig->signame, action); | |
429 | |
430 if (ignore) { | |
431 ngx_log_error(NGX_LOG_CRIT, ngx_cycle->log, 0, | |
432 "the changing binary signal is ignored: " | |
433 "you should shutdown or terminate " | |
434 "before either old or new binary's process"); | |
435 } | |
436 | |
437 if (signo == SIGCHLD) { | |
438 ngx_process_get_status(); | |
439 } | |
440 | |
441 ngx_set_errno(err); | |
442 } | |
443 | |
444 | |
445 static void | |
515 | 446 ngx_process_get_status(void) |
218
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447 { |
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448 int status; |
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449 char *process; |
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450 ngx_pid_t pid; |
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451 ngx_err_t err; |
354
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452 ngx_int_t i; |
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453 ngx_uint_t one; |
477 | 454 |
191
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455 one = 0; |
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|
456 |
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457 for ( ;; ) { |
71ce40b3c37b
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458 pid = waitpid(-1, &status, WNOHANG); |
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diff
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|
459 |
71ce40b3c37b
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460 if (pid == 0) { |
71ce40b3c37b
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461 return; |
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462 } |
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|
463 |
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464 if (pid == -1) { |
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465 err = ngx_errno; |
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diff
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|
466 |
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467 if (err == NGX_EINTR) { |
71ce40b3c37b
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468 continue; |
71ce40b3c37b
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|
469 } |
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|
470 |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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diff
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|
471 if (err == NGX_ECHILD && one) { |
71ce40b3c37b
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|
472 return; |
71ce40b3c37b
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|
473 } |
71ce40b3c37b
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diff
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|
474 |
943
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698
diff
changeset
|
475 #if (NGX_SOLARIS || NGX_FREEBSD) |
452 | 476 |
477 /* | |
478 * Solaris always calls the signal handler for each exited process | |
943
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698
diff
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|
479 * 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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698
diff
changeset
|
480 * |
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diff
changeset
|
481 * 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
|
482 * erroneously call the signal handler for exited process |
1963 | 483 * despite waitpid() may be already called for this process. |
452 | 484 */ |
485 | |
486 if (err == NGX_ECHILD) { | |
3787
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|
487 ngx_log_error(NGX_LOG_INFO, ngx_cycle->log, err, |
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diff
changeset
|
488 "waitpid() failed"); |
563 | 489 return; |
452 | 490 } |
491 | |
492 #endif | |
493 | |
3787
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494 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, err, |
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use copied strerror() messages and autoconfigured sys_nerr value
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diff
changeset
|
495 "waitpid() failed"); |
191
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496 return; |
71ce40b3c37b
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parents:
diff
changeset
|
497 } |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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parents:
diff
changeset
|
498 |
306
6b91bfbc4123
nginx-0.0.3-2004-04-05-00:32:09 import
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279
diff
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|
499 |
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nginx-0.0.3-2004-04-05-00:32:09 import
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279
diff
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|
500 if (ngx_accept_mutex_ptr) { |
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279
diff
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501 |
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279
diff
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|
502 /* |
6b91bfbc4123
nginx-0.0.3-2004-04-05-00:32:09 import
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279
diff
changeset
|
503 * unlock the accept mutex if the abnormally exited process |
6b91bfbc4123
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279
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|
504 * held it |
6b91bfbc4123
nginx-0.0.3-2004-04-05-00:32:09 import
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279
diff
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|
505 */ |
6b91bfbc4123
nginx-0.0.3-2004-04-05-00:32:09 import
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|
506 |
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279
diff
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|
507 ngx_atomic_cmp_set(ngx_accept_mutex_ptr, pid, 0); |
6b91bfbc4123
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279
diff
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|
508 } |
6b91bfbc4123
nginx-0.0.3-2004-04-05-00:32:09 import
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279
diff
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|
509 |
6b91bfbc4123
nginx-0.0.3-2004-04-05-00:32:09 import
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279
diff
changeset
|
510 |
191
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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parents:
diff
changeset
|
511 one = 1; |
389
537de4dca8ca
nginx-0.0.7-2004-07-13-21:59:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
366
diff
changeset
|
512 process = "unknown process"; |
191
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parents:
diff
changeset
|
513 |
218
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195
diff
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|
514 for (i = 0; i < ngx_last_process; i++) { |
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parents:
195
diff
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|
515 if (ngx_processes[i].pid == pid) { |
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parents:
195
diff
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|
516 ngx_processes[i].status = status; |
222
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517 ngx_processes[i].exited = 1; |
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518 process = ngx_processes[i].name; |
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519 break; |
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520 } |
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521 } |
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522 |
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523 if (WTERMSIG(status)) { |
2494 | 524 #ifdef WCOREDUMP |
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525 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, |
461 | 526 "%s %P exited on signal %d%s", |
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527 process, pid, WTERMSIG(status), |
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528 WCOREDUMP(status) ? " (core dumped)" : ""); |
2494 | 529 #else |
530 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, | |
531 "%s %P exited on signal %d", | |
532 process, pid, WTERMSIG(status)); | |
533 #endif | |
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534 |
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535 } else { |
477 | 536 ngx_log_error(NGX_LOG_NOTICE, ngx_cycle->log, 0, |
461 | 537 "%s %P exited with code %d", |
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538 process, pid, WEXITSTATUS(status)); |
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539 } |
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540 |
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541 if (WEXITSTATUS(status) == 2 && ngx_processes[i].respawn) { |
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542 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, |
1963 | 543 "%s %P exited with fatal code %d " |
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544 "and cannot be respawned", |
1963 | 545 process, pid, WEXITSTATUS(status)); |
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546 ngx_processes[i].respawn = 0; |
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547 } |
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548 } |
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549 } |
461 | 550 |
551 | |
515 | 552 void |
553 ngx_debug_point(void) | |
461 | 554 { |
555 ngx_core_conf_t *ccf; | |
556 | |
557 ccf = (ngx_core_conf_t *) ngx_get_conf(ngx_cycle->conf_ctx, | |
558 ngx_core_module); | |
559 | |
560 switch (ccf->debug_points) { | |
561 | |
562 case NGX_DEBUG_POINTS_STOP: | |
563 raise(SIGSTOP); | |
564 break; | |
565 | |
566 case NGX_DEBUG_POINTS_ABORT: | |
563 | 567 ngx_abort(); |
461 | 568 } |
569 } | |
2738
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570 |
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571 |
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572 ngx_int_t |
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573 ngx_os_signal_process(ngx_cycle_t *cycle, char *name, ngx_int_t pid) |
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574 { |
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575 ngx_signal_t *sig; |
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576 |
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577 for (sig = signals; sig->signo != 0; sig++) { |
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578 if (ngx_strcmp(name, sig->name) == 0) { |
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579 if (kill(pid, sig->signo) != -1) { |
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580 return 0; |
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581 } |
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582 |
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583 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
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584 "kill(%P, %d) failed", pid, sig->signo); |
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585 } |
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586 } |
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587 |
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588 return 1; |
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589 } |