Mercurial > hg > nginx
annotate src/os/unix/ngx_process.c @ 4019:5364d2e711cc
SIGWINCH/NOACCEPT signal is disabled now in non-daemon mode.
Non-daemon mode is currently used by supervisord, daemontools and so on
or during debugging. The NOACCEPT signal is only used for online upgrade
which is not supported when nginx is run under supervisord, etc.,
so this change should not break existant setups.
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Mon, 22 Aug 2011 12:34:48 +0000 |
| parents | e294f37401c0 |
| children | 59b99f217c6d |
| 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 |
| 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]; | |
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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) | |
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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; |
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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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360
diff
changeset
|
149 } |
|
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 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
|
152 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
|
153 "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
|
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>
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252 } |
|
191
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253 |
|
225
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254 return pid; |
|
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255 } |
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256 |
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257 |
| 515 | 258 ngx_pid_t |
| 259 ngx_execute(ngx_cycle_t *cycle, ngx_exec_ctx_t *ctx) | |
|
218
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260 { |
|
279
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261 return ngx_spawn_process(cycle, ngx_execute_proc, ctx, ctx->name, |
|
226
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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) | |
|
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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 | |
|
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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: | |
|
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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: | |
|
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393 case NGX_PROCESS_HELPER: |
| 539 | 394 switch (signo) { |
| 395 | |
| 396 case ngx_signal_value(NGX_NOACCEPT_SIGNAL): | |
|
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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
eaf1f651cf86
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318
diff
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|
452 ngx_int_t i; |
|
eaf1f651cf86
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318
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|
453 ngx_uint_t one; |
| 477 | 454 |
|
191
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diff
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|
455 one = 0; |
|
71ce40b3c37b
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diff
changeset
|
456 |
|
71ce40b3c37b
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parents:
diff
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|
457 for ( ;; ) { |
|
71ce40b3c37b
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diff
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|
458 pid = waitpid(-1, &status, WNOHANG); |
|
71ce40b3c37b
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parents:
diff
changeset
|
459 |
|
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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parents:
diff
changeset
|
460 if (pid == 0) { |
|
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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parents:
diff
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|
461 return; |
|
71ce40b3c37b
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diff
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|
462 } |
|
71ce40b3c37b
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parents:
diff
changeset
|
463 |
|
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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parents:
diff
changeset
|
464 if (pid == -1) { |
|
71ce40b3c37b
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diff
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|
465 err = ngx_errno; |
|
71ce40b3c37b
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parents:
diff
changeset
|
466 |
|
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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parents:
diff
changeset
|
467 if (err == NGX_EINTR) { |
|
71ce40b3c37b
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parents:
diff
changeset
|
468 continue; |
|
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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parents:
diff
changeset
|
469 } |
|
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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parents:
diff
changeset
|
470 |
|
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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parents:
diff
changeset
|
471 if (err == NGX_ECHILD && one) { |
|
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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diff
changeset
|
472 return; |
|
71ce40b3c37b
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|
473 } |
|
71ce40b3c37b
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diff
changeset
|
474 |
|
943
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lower the log level of the waitpid() ENOCHILD error on FreeBSD
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parents:
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
changeset
|
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 * |
|
cbe0292e53b3
lower the log level of the waitpid() ENOCHILD error on FreeBSD
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698
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) { | |
|
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3681
diff
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|
487 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
|
488 "waitpid() failed"); |
| 563 | 489 return; |
| 452 | 490 } |
| 491 | |
| 492 #endif | |
| 493 | |
|
3787
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use copied strerror() messages and autoconfigured sys_nerr value
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|
494 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, err, |
|
e294f37401c0
use copied strerror() messages and autoconfigured sys_nerr value
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parents:
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diff
changeset
|
495 "waitpid() failed"); |
|
191
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diff
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|
496 return; |
|
71ce40b3c37b
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diff
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|
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
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changeset
|
499 |
|
6b91bfbc4123
nginx-0.0.3-2004-04-05-00:32:09 import
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diff
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|
500 if (ngx_accept_mutex_ptr) { |
|
6b91bfbc4123
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279
diff
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|
501 |
|
6b91bfbc4123
nginx-0.0.3-2004-04-05-00:32:09 import
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diff
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|
502 /* |
|
6b91bfbc4123
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503 * unlock the accept mutex if the abnormally exited process |
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504 * held it |
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505 */ |
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506 |
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507 ngx_atomic_cmp_set(ngx_accept_mutex_ptr, pid, 0); |
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508 } |
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509 |
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510 |
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191
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nginx-0.0.1-2003-11-19-19:26:41 import
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511 one = 1; |
|
389
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nginx-0.0.7-2004-07-13-21:59:12 import
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512 process = "unknown process"; |
|
191
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513 |
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218
05592fd7a436
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514 for (i = 0; i < ngx_last_process; i++) { |
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515 if (ngx_processes[i].pid == pid) { |
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516 ngx_processes[i].status = status; |
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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 " |
| 544 "and can not be respawn", | |
| 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 } |