Mercurial > hg > nginx-quic
annotate src/os/unix/ngx_process.c @ 5707:31dd63dcb9ea
Events: use eventfd() instead of syscall(SYS_eventfd) if possible.
This fixes --with-file-aio support on systems that lack eventfd()
syscall, notably aarch64 Linux.
The syscall(SYS_eventfd) may still be necessary on systems that
have eventfd() syscall in the kernel but lack it in glibc, e.g.
as seen in the current CentOS 5 release.
author | Ruslan Ermilov <ru@nginx.com> |
---|---|
date | Fri, 23 May 2014 16:37:05 +0400 |
parents | 593d344999f5 |
children | 2b7dacb381ed |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
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5 */ |
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6 |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 #include <ngx_event.h> |
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11 #include <ngx_channel.h> |
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12 |
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13 |
539 | 14 typedef struct { |
3681 | 15 int signo; |
16 char *signame; | |
17 char *name; | |
18 void (*handler)(int signo); | |
539 | 19 } ngx_signal_t; |
20 | |
21 | |
22 | |
279
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23 static void ngx_execute_proc(ngx_cycle_t *cycle, void *data); |
539 | 24 static void ngx_signal_handler(int signo); |
25 static void ngx_process_get_status(void); | |
4311
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26 static void ngx_unlock_mutexes(ngx_pid_t pid); |
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27 |
452 | 28 |
29 int ngx_argc; | |
30 char **ngx_argv; | |
31 char **ngx_os_argv; | |
32 | |
33 ngx_int_t ngx_process_slot; | |
34 ngx_socket_t ngx_channel; | |
35 ngx_int_t ngx_last_process; | |
36 ngx_process_t ngx_processes[NGX_MAX_PROCESSES]; | |
191
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37 |
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38 |
539 | 39 ngx_signal_t signals[] = { |
40 { ngx_signal_value(NGX_RECONFIGURE_SIGNAL), | |
41 "SIG" ngx_value(NGX_RECONFIGURE_SIGNAL), | |
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42 "reload", |
539 | 43 ngx_signal_handler }, |
44 | |
45 { ngx_signal_value(NGX_REOPEN_SIGNAL), | |
46 "SIG" ngx_value(NGX_REOPEN_SIGNAL), | |
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47 "reopen", |
539 | 48 ngx_signal_handler }, |
49 | |
50 { ngx_signal_value(NGX_NOACCEPT_SIGNAL), | |
51 "SIG" ngx_value(NGX_NOACCEPT_SIGNAL), | |
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52 "", |
539 | 53 ngx_signal_handler }, |
54 | |
55 { ngx_signal_value(NGX_TERMINATE_SIGNAL), | |
56 "SIG" ngx_value(NGX_TERMINATE_SIGNAL), | |
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57 "stop", |
539 | 58 ngx_signal_handler }, |
59 | |
60 { ngx_signal_value(NGX_SHUTDOWN_SIGNAL), | |
61 "SIG" ngx_value(NGX_SHUTDOWN_SIGNAL), | |
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62 "quit", |
539 | 63 ngx_signal_handler }, |
64 | |
65 { ngx_signal_value(NGX_CHANGEBIN_SIGNAL), | |
66 "SIG" ngx_value(NGX_CHANGEBIN_SIGNAL), | |
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67 "", |
539 | 68 ngx_signal_handler }, |
69 | |
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70 { SIGALRM, "SIGALRM", "", ngx_signal_handler }, |
539 | 71 |
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72 { SIGINT, "SIGINT", "", ngx_signal_handler }, |
539 | 73 |
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74 { SIGIO, "SIGIO", "", ngx_signal_handler }, |
539 | 75 |
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76 { SIGCHLD, "SIGCHLD", "", ngx_signal_handler }, |
539 | 77 |
3045 | 78 { SIGSYS, "SIGSYS, SIG_IGN", "", SIG_IGN }, |
79 | |
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80 { SIGPIPE, "SIGPIPE, SIG_IGN", "", SIG_IGN }, |
539 | 81 |
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82 { 0, NULL, "", NULL } |
539 | 83 }; |
84 | |
85 | |
515 | 86 ngx_pid_t |
87 ngx_spawn_process(ngx_cycle_t *cycle, ngx_spawn_proc_pt proc, void *data, | |
88 char *name, ngx_int_t respawn) | |
191
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89 { |
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90 u_long on; |
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91 ngx_pid_t pid; |
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92 ngx_int_t s; |
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93 |
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94 if (respawn >= 0) { |
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95 s = respawn; |
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96 |
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97 } else { |
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98 for (s = 0; s < ngx_last_process; s++) { |
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99 if (ngx_processes[s].pid == -1) { |
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100 break; |
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101 } |
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102 } |
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103 |
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104 if (s == NGX_MAX_PROCESSES) { |
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105 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, |
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106 "no more than %d processes can be spawned", |
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107 NGX_MAX_PROCESSES); |
543 | 108 return NGX_INVALID_PID; |
389
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109 } |
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110 } |
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111 |
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112 |
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113 if (respawn != NGX_PROCESS_DETACHED) { |
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114 |
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115 /* Solaris 9 still has no AF_LOCAL */ |
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116 |
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117 if (socketpair(AF_UNIX, SOCK_STREAM, 0, ngx_processes[s].channel) == -1) |
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118 { |
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119 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
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120 "socketpair() failed while spawning \"%s\"", name); |
543 | 121 return NGX_INVALID_PID; |
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122 } |
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123 |
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124 ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0, |
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125 "channel %d:%d", |
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126 ngx_processes[s].channel[0], |
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127 ngx_processes[s].channel[1]); |
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128 |
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129 if (ngx_nonblocking(ngx_processes[s].channel[0]) == -1) { |
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130 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
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131 ngx_nonblocking_n " failed while spawning \"%s\"", |
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132 name); |
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133 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
543 | 134 return NGX_INVALID_PID; |
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135 } |
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136 |
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137 if (ngx_nonblocking(ngx_processes[s].channel[1]) == -1) { |
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138 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
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139 ngx_nonblocking_n " failed while spawning \"%s\"", |
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140 name); |
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141 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
543 | 142 return NGX_INVALID_PID; |
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143 } |
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144 |
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145 on = 1; |
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146 if (ioctl(ngx_processes[s].channel[0], FIOASYNC, &on) == -1) { |
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147 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
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148 "ioctl(FIOASYNC) failed while spawning \"%s\"", name); |
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149 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
543 | 150 return NGX_INVALID_PID; |
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151 } |
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152 |
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153 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
|
154 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
|
155 "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
|
156 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
543 | 157 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
|
158 } |
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
159 |
366
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
160 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
|
161 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
|
162 "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
|
163 name); |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
164 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
543 | 165 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
|
166 } |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
167 |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
168 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
|
169 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
|
170 "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
|
171 name); |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
172 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
543 | 173 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
|
174 } |
e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
Igor Sysoev <igor@sysoev.ru>
parents:
365
diff
changeset
|
175 |
365
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
176 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
|
177 |
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
178 } else { |
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[0] = -1; |
fd24ba70e1b3
nginx-0.0.7-2004-06-23-09:54:27 import
Igor Sysoev <igor@sysoev.ru>
parents:
360
diff
changeset
|
180 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
|
181 } |
239e37d44a34
nginx-0.0.7-2004-06-18-20:22:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
355
diff
changeset
|
182 |
239e37d44a34
nginx-0.0.7-2004-06-18-20:22:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
355
diff
changeset
|
183 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
|
184 |
191
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
185 |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
186 pid = fork(); |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
187 |
354
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
188 switch (pid) { |
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
189 |
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
190 case -1: |
218
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
191 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
|
192 "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
|
193 ngx_close_channel(ngx_processes[s].channel, cycle->log); |
543 | 194 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
|
195 |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
196 case 0: |
249
2a0540287298
nginx-0.0.2-2004-02-03-19:43:54 import
Igor Sysoev <igor@sysoev.ru>
parents:
248
diff
changeset
|
197 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
|
198 proc(cycle, data); |
191
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
199 break; |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
200 |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
201 default: |
195
8dee38ea9117
nginx-0.0.1-2003-11-25-23:44:56 import
Igor Sysoev <igor@sysoev.ru>
parents:
191
diff
changeset
|
202 break; |
191
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
203 } |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
204 |
477 | 205 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
|
206 |
354
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].pid = pid; |
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
208 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
|
209 |
218
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
210 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
|
211 return pid; |
218
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
212 } |
191
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
213 |
354
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].proc = proc; |
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].data = data; |
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].name = name; |
eaf1f651cf86
nginx-0.0.7-2004-06-15-11:55:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
318
diff
changeset
|
217 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
|
218 |
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
219 switch (respawn) { |
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
220 |
3016
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
221 case NGX_PROCESS_NORESPAWN: |
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
222 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
|
223 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
|
224 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
|
225 break; |
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
226 |
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
227 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
|
228 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
|
229 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
|
230 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
|
231 break; |
d82993af1da0
introduce NGX_PROCESS_JUST_SPAWN and change field name accordingly
Igor Sysoev <igor@sysoev.ru>
parents:
2738
diff
changeset
|
232 |
318
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
233 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
|
234 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
|
235 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
|
236 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
|
237 break; |
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
238 |
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
239 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
|
240 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
|
241 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
|
242 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
|
243 break; |
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
244 |
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
245 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
|
246 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
|
247 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
|
248 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
|
249 break; |
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
250 } |
56496082668b
nginx-0.0.3-2004-04-16-09:14:16 import
Igor Sysoev <igor@sysoev.ru>
parents:
306
diff
changeset
|
251 |
389
537de4dca8ca
nginx-0.0.7-2004-07-13-21:59:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
366
diff
changeset
|
252 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
|
253 ngx_last_process++; |
537de4dca8ca
nginx-0.0.7-2004-07-13-21:59:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
366
diff
changeset
|
254 } |
191
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
255 |
225
2e9a8a14a0cf
nginx-0.0.1-2004-01-13-19:43:23 import
Igor Sysoev <igor@sysoev.ru>
parents:
224
diff
changeset
|
256 return pid; |
218
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
257 } |
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
258 |
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
Igor Sysoev <igor@sysoev.ru>
parents:
195
diff
changeset
|
259 |
515 | 260 ngx_pid_t |
261 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>
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262 { |
279
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263 return ngx_spawn_process(cycle, ngx_execute_proc, ctx, ctx->name, |
226
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264 NGX_PROCESS_DETACHED); |
191
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265 } |
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266 |
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267 |
515 | 268 static void |
269 ngx_execute_proc(ngx_cycle_t *cycle, void *data) | |
218
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270 { |
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271 ngx_exec_ctx_t *ctx = data; |
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272 |
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273 if (execve(ctx->path, ctx->argv, ctx->envp) == -1) { |
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274 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
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275 "execve() failed while executing %s \"%s\"", |
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276 ctx->name, ctx->path); |
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277 } |
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278 |
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279 exit(1); |
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280 } |
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281 |
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282 |
539 | 283 ngx_int_t |
284 ngx_init_signals(ngx_log_t *log) | |
285 { | |
286 ngx_signal_t *sig; | |
287 struct sigaction sa; | |
288 | |
289 for (sig = signals; sig->signo != 0; sig++) { | |
290 ngx_memzero(&sa, sizeof(struct sigaction)); | |
291 sa.sa_handler = sig->handler; | |
292 sigemptyset(&sa.sa_mask); | |
293 if (sigaction(sig->signo, &sa, NULL) == -1) { | |
5244
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294 #if (NGX_VALGRIND) |
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295 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, |
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296 "sigaction(%s) failed, ignored", sig->signame); |
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297 #else |
539 | 298 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, |
299 "sigaction(%s) failed", sig->signame); | |
300 return NGX_ERROR; | |
5244
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301 #endif |
539 | 302 } |
303 } | |
304 | |
305 return NGX_OK; | |
306 } | |
307 | |
308 | |
515 | 309 void |
539 | 310 ngx_signal_handler(int signo) |
311 { | |
312 char *action; | |
313 ngx_int_t ignore; | |
314 ngx_err_t err; | |
315 ngx_signal_t *sig; | |
316 | |
317 ignore = 0; | |
318 | |
319 err = ngx_errno; | |
320 | |
321 for (sig = signals; sig->signo != 0; sig++) { | |
322 if (sig->signo == signo) { | |
323 break; | |
324 } | |
325 } | |
326 | |
3475
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327 ngx_time_sigsafe_update(); |
539 | 328 |
329 action = ""; | |
330 | |
331 switch (ngx_process) { | |
332 | |
333 case NGX_PROCESS_MASTER: | |
334 case NGX_PROCESS_SINGLE: | |
335 switch (signo) { | |
336 | |
337 case ngx_signal_value(NGX_SHUTDOWN_SIGNAL): | |
338 ngx_quit = 1; | |
339 action = ", shutting down"; | |
340 break; | |
341 | |
342 case ngx_signal_value(NGX_TERMINATE_SIGNAL): | |
343 case SIGINT: | |
344 ngx_terminate = 1; | |
345 action = ", exiting"; | |
346 break; | |
347 | |
348 case ngx_signal_value(NGX_NOACCEPT_SIGNAL): | |
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349 if (ngx_daemonized) { |
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350 ngx_noaccept = 1; |
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351 action = ", stop accepting connections"; |
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352 } |
539 | 353 break; |
354 | |
355 case ngx_signal_value(NGX_RECONFIGURE_SIGNAL): | |
356 ngx_reconfigure = 1; | |
357 action = ", reconfiguring"; | |
358 break; | |
359 | |
360 case ngx_signal_value(NGX_REOPEN_SIGNAL): | |
361 ngx_reopen = 1; | |
362 action = ", reopening logs"; | |
363 break; | |
364 | |
365 case ngx_signal_value(NGX_CHANGEBIN_SIGNAL): | |
366 if (getppid() > 1 || ngx_new_binary > 0) { | |
367 | |
368 /* | |
369 * Ignore the signal in the new binary if its parent is | |
370 * not the init process, i.e. the old binary's process | |
698 | 371 * is still running. Or ignore the signal in the old binary's |
539 | 372 * process if the new binary's process is already running. |
373 */ | |
374 | |
375 action = ", ignoring"; | |
376 ignore = 1; | |
377 break; | |
378 } | |
379 | |
380 ngx_change_binary = 1; | |
381 action = ", changing binary"; | |
382 break; | |
383 | |
384 case SIGALRM: | |
3048
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385 ngx_sigalrm = 1; |
539 | 386 break; |
387 | |
388 case SIGIO: | |
389 ngx_sigio = 1; | |
390 break; | |
391 | |
392 case SIGCHLD: | |
393 ngx_reap = 1; | |
394 break; | |
395 } | |
396 | |
397 break; | |
398 | |
399 case NGX_PROCESS_WORKER: | |
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400 case NGX_PROCESS_HELPER: |
539 | 401 switch (signo) { |
402 | |
403 case ngx_signal_value(NGX_NOACCEPT_SIGNAL): | |
4019
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404 if (!ngx_daemonized) { |
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405 break; |
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SIGWINCH/NOACCEPT signal is disabled now in non-daemon mode.
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406 } |
539 | 407 ngx_debug_quit = 1; |
408 case ngx_signal_value(NGX_SHUTDOWN_SIGNAL): | |
409 ngx_quit = 1; | |
410 action = ", shutting down"; | |
411 break; | |
412 | |
413 case ngx_signal_value(NGX_TERMINATE_SIGNAL): | |
414 case SIGINT: | |
415 ngx_terminate = 1; | |
416 action = ", exiting"; | |
417 break; | |
418 | |
419 case ngx_signal_value(NGX_REOPEN_SIGNAL): | |
420 ngx_reopen = 1; | |
421 action = ", reopening logs"; | |
422 break; | |
423 | |
424 case ngx_signal_value(NGX_RECONFIGURE_SIGNAL): | |
425 case ngx_signal_value(NGX_CHANGEBIN_SIGNAL): | |
426 case SIGIO: | |
427 action = ", ignoring"; | |
428 break; | |
429 } | |
430 | |
431 break; | |
432 } | |
433 | |
434 ngx_log_error(NGX_LOG_NOTICE, ngx_cycle->log, 0, | |
435 "signal %d (%s) received%s", signo, sig->signame, action); | |
436 | |
437 if (ignore) { | |
438 ngx_log_error(NGX_LOG_CRIT, ngx_cycle->log, 0, | |
439 "the changing binary signal is ignored: " | |
440 "you should shutdown or terminate " | |
441 "before either old or new binary's process"); | |
442 } | |
443 | |
444 if (signo == SIGCHLD) { | |
445 ngx_process_get_status(); | |
446 } | |
447 | |
448 ngx_set_errno(err); | |
449 } | |
450 | |
451 | |
452 static void | |
515 | 453 ngx_process_get_status(void) |
218
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454 { |
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455 int status; |
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456 char *process; |
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457 ngx_pid_t pid; |
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458 ngx_err_t err; |
354
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318
diff
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|
459 ngx_int_t i; |
eaf1f651cf86
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460 ngx_uint_t one; |
477 | 461 |
191
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462 one = 0; |
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|
463 |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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464 for ( ;; ) { |
71ce40b3c37b
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465 pid = waitpid(-1, &status, WNOHANG); |
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parents:
diff
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|
466 |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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diff
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|
467 if (pid == 0) { |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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468 return; |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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diff
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|
469 } |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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diff
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|
470 |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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diff
changeset
|
471 if (pid == -1) { |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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diff
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|
472 err = ngx_errno; |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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parents:
diff
changeset
|
473 |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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diff
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|
474 if (err == NGX_EINTR) { |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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parents:
diff
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|
475 continue; |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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parents:
diff
changeset
|
476 } |
71ce40b3c37b
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parents:
diff
changeset
|
477 |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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diff
changeset
|
478 if (err == NGX_ECHILD && one) { |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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diff
changeset
|
479 return; |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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parents:
diff
changeset
|
480 } |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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parents:
diff
changeset
|
481 |
452 | 482 /* |
483 * Solaris always calls the signal handler for each exited process | |
943
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lower the log level of the waitpid() ENOCHILD error on FreeBSD
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698
diff
changeset
|
484 * 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
|
485 * |
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diff
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|
486 * 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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diff
changeset
|
487 * erroneously call the signal handler for exited process |
1963 | 488 * despite waitpid() may be already called for this process. |
452 | 489 */ |
490 | |
491 if (err == NGX_ECHILD) { | |
3787
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|
492 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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|
493 "waitpid() failed"); |
563 | 494 return; |
452 | 495 } |
496 | |
3787
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497 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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|
498 "waitpid() failed"); |
191
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|
499 return; |
71ce40b3c37b
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parents:
diff
changeset
|
500 } |
71ce40b3c37b
nginx-0.0.1-2003-11-19-19:26:41 import
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parents:
diff
changeset
|
501 |
306
6b91bfbc4123
nginx-0.0.3-2004-04-05-00:32:09 import
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parents:
279
diff
changeset
|
502 |
191
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diff
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|
503 one = 1; |
389
537de4dca8ca
nginx-0.0.7-2004-07-13-21:59:12 import
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parents:
366
diff
changeset
|
504 process = "unknown process"; |
191
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|
505 |
218
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diff
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506 for (i = 0; i < ngx_last_process; i++) { |
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diff
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507 if (ngx_processes[i].pid == pid) { |
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195
diff
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|
508 ngx_processes[i].status = status; |
222
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nginx-0.0.1-2004-01-09-00:02:06 import
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parents:
221
diff
changeset
|
509 ngx_processes[i].exited = 1; |
218
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diff
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510 process = ngx_processes[i].name; |
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195
diff
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|
511 break; |
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
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195
diff
changeset
|
512 } |
05592fd7a436
nginx-0.0.1-2004-01-05-23:55:48 import
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195
diff
changeset
|
513 } |
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514 |
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515 if (WTERMSIG(status)) { |
2494 | 516 #ifdef WCOREDUMP |
218
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517 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, |
461 | 518 "%s %P exited on signal %d%s", |
218
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519 process, pid, WTERMSIG(status), |
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520 WCOREDUMP(status) ? " (core dumped)" : ""); |
2494 | 521 #else |
522 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, | |
523 "%s %P exited on signal %d", | |
524 process, pid, WTERMSIG(status)); | |
525 #endif | |
218
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526 |
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527 } else { |
477 | 528 ngx_log_error(NGX_LOG_NOTICE, ngx_cycle->log, 0, |
461 | 529 "%s %P exited with code %d", |
218
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530 process, pid, WEXITSTATUS(status)); |
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531 } |
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532 |
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533 if (WEXITSTATUS(status) == 2 && ngx_processes[i].respawn) { |
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534 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, |
1963 | 535 "%s %P exited with fatal code %d " |
4133
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536 "and cannot be respawned", |
1963 | 537 process, pid, WEXITSTATUS(status)); |
234
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538 ngx_processes[i].respawn = 0; |
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539 } |
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540 |
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541 ngx_unlock_mutexes(pid); |
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542 } |
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543 } |
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544 |
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545 |
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546 static void |
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547 ngx_unlock_mutexes(ngx_pid_t pid) |
4522 | 548 { |
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549 ngx_uint_t i; |
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550 ngx_shm_zone_t *shm_zone; |
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551 ngx_list_part_t *part; |
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552 ngx_slab_pool_t *sp; |
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553 |
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554 /* |
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555 * unlock the accept mutex if the abnormally exited process |
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556 * held it |
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557 */ |
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558 |
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559 if (ngx_accept_mutex_ptr) { |
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560 (void) ngx_shmtx_force_unlock(&ngx_accept_mutex, pid); |
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561 } |
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562 |
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563 /* |
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564 * unlock shared memory mutexes if held by the abnormally exited |
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565 * process |
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566 */ |
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567 |
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568 part = (ngx_list_part_t *) &ngx_cycle->shared_memory.part; |
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569 shm_zone = part->elts; |
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570 |
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571 for (i = 0; /* void */ ; i++) { |
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572 |
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573 if (i >= part->nelts) { |
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574 if (part->next == NULL) { |
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575 break; |
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576 } |
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577 part = part->next; |
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578 shm_zone = part->elts; |
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579 i = 0; |
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580 } |
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581 |
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582 sp = (ngx_slab_pool_t *) shm_zone[i].shm.addr; |
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583 |
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584 if (ngx_shmtx_force_unlock(&sp->mutex, pid)) { |
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585 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, |
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586 "shared memory zone \"%V\" was locked by %P", |
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587 &shm_zone[i].shm.name, pid); |
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588 } |
191
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589 } |
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590 } |
461 | 591 |
592 | |
515 | 593 void |
594 ngx_debug_point(void) | |
461 | 595 { |
596 ngx_core_conf_t *ccf; | |
597 | |
598 ccf = (ngx_core_conf_t *) ngx_get_conf(ngx_cycle->conf_ctx, | |
599 ngx_core_module); | |
600 | |
601 switch (ccf->debug_points) { | |
602 | |
603 case NGX_DEBUG_POINTS_STOP: | |
604 raise(SIGSTOP); | |
605 break; | |
606 | |
607 case NGX_DEBUG_POINTS_ABORT: | |
563 | 608 ngx_abort(); |
461 | 609 } |
610 } | |
2738
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611 |
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612 |
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613 ngx_int_t |
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614 ngx_os_signal_process(ngx_cycle_t *cycle, char *name, ngx_int_t pid) |
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615 { |
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|
616 ngx_signal_t *sig; |
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617 |
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618 for (sig = signals; sig->signo != 0; sig++) { |
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619 if (ngx_strcmp(name, sig->name) == 0) { |
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|
620 if (kill(pid, sig->signo) != -1) { |
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621 return 0; |
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622 } |
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623 |
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624 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
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625 "kill(%P, %d) failed", pid, sig->signo); |
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626 } |
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|
627 } |
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|
628 |
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|
629 return 1; |
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630 } |