0
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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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5
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6
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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
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13 static void ngx_start_worker_processes(ngx_cycle_t *cycle, ngx_int_t n,
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50
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14 ngx_int_t type);
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16
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15 static void ngx_start_garbage_collector(ngx_cycle_t *cycle, ngx_int_t type);
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0
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16 static void ngx_signal_worker_processes(ngx_cycle_t *cycle, int signo);
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17 static ngx_uint_t ngx_reap_childs(ngx_cycle_t *cycle);
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2
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18 static void ngx_master_exit(ngx_cycle_t *cycle);
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0
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19 static void ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data);
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22
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20 static void ngx_worker_process_init(ngx_cycle_t *cycle, ngx_uint_t priority);
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0
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21 static void ngx_channel_handler(ngx_event_t *ev);
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22 #if (NGX_THREADS)
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23 static void ngx_wakeup_worker_threads(ngx_cycle_t *cycle);
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24 static void *ngx_worker_thread_cycle(void *data);
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25 #endif
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50
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26 #if 0
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16
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27 static void ngx_garbage_collector_cycle(ngx_cycle_t *cycle, void *data);
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50
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28 #endif
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0
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29
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30
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31 ngx_uint_t ngx_process;
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32 ngx_pid_t ngx_pid;
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33 ngx_uint_t ngx_threaded;
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34
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35 sig_atomic_t ngx_reap;
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36 sig_atomic_t ngx_timer;
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37 sig_atomic_t ngx_sigio;
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38 sig_atomic_t ngx_terminate;
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39 sig_atomic_t ngx_quit;
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26
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40 sig_atomic_t ngx_debug_quit;
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0
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41 ngx_uint_t ngx_exiting;
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42 sig_atomic_t ngx_reconfigure;
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43 sig_atomic_t ngx_reopen;
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44
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45 sig_atomic_t ngx_change_binary;
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46 ngx_pid_t ngx_new_binary;
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47 ngx_uint_t ngx_inherited;
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48 ngx_uint_t ngx_daemonized;
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49
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50 sig_atomic_t ngx_noaccept;
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51 ngx_uint_t ngx_noaccepting;
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52 ngx_uint_t ngx_restart;
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53
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54
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55 #if (NGX_THREADS)
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56 volatile ngx_thread_t ngx_threads[NGX_MAX_THREADS];
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57 ngx_int_t ngx_threads_n;
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58 #endif
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59
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60
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61 u_char master_process[] = "master process";
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62
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63
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50
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64 void
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65 ngx_master_process_cycle(ngx_cycle_t *cycle)
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0
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66 {
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67 char *title;
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68 u_char *p;
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69 size_t size;
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70 ngx_int_t i;
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71 sigset_t set;
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72 struct timeval tv;
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73 struct itimerval itv;
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74 ngx_uint_t live;
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75 ngx_msec_t delay;
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76 ngx_core_conf_t *ccf;
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77
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78 sigemptyset(&set);
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79 sigaddset(&set, SIGCHLD);
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80 sigaddset(&set, SIGALRM);
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81 sigaddset(&set, SIGIO);
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82 sigaddset(&set, SIGINT);
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83 sigaddset(&set, ngx_signal_value(NGX_RECONFIGURE_SIGNAL));
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84 sigaddset(&set, ngx_signal_value(NGX_REOPEN_SIGNAL));
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85 sigaddset(&set, ngx_signal_value(NGX_NOACCEPT_SIGNAL));
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86 sigaddset(&set, ngx_signal_value(NGX_TERMINATE_SIGNAL));
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87 sigaddset(&set, ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
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88 sigaddset(&set, ngx_signal_value(NGX_CHANGEBIN_SIGNAL));
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89
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90 if (sigprocmask(SIG_BLOCK, &set, NULL) == -1) {
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91 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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92 "sigprocmask() failed");
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93 }
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94
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95 sigemptyset(&set);
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96
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97
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98 size = sizeof(master_process);
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99
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2
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100 for (i = 0; i < ngx_argc; i++) {
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101 size += ngx_strlen(ngx_argv[i]) + 1;
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0
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102 }
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103
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104 title = ngx_palloc(cycle->pool, size);
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105
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106 p = ngx_cpymem(title, master_process, sizeof(master_process) - 1);
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2
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107 for (i = 0; i < ngx_argc; i++) {
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0
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108 *p++ = ' ';
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2
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109 p = ngx_cpystrn(p, (u_char *) ngx_argv[i], size);
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0
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110 }
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111
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112 ngx_setproctitle(title);
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113
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114
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115 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
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116
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117 ngx_start_worker_processes(cycle, ccf->worker_processes,
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118 NGX_PROCESS_RESPAWN);
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16
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119 ngx_start_garbage_collector(cycle, NGX_PROCESS_RESPAWN);
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0
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120
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121 ngx_new_binary = 0;
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122 delay = 0;
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123 live = 1;
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124
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125 for ( ;; ) {
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126 if (delay) {
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127 delay *= 2;
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128
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129 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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130 "temination cycle: %d", delay);
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131
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132 itv.it_interval.tv_sec = 0;
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133 itv.it_interval.tv_usec = 0;
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134 itv.it_value.tv_sec = delay / 1000;
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135 itv.it_value.tv_usec = (delay % 1000 ) * 1000;
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136
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137 if (setitimer(ITIMER_REAL, &itv, NULL) == -1) {
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138 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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139 "setitimer() failed");
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140 }
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141 }
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142
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143 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "sigsuspend");
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144
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145 sigsuspend(&set);
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146
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147 ngx_gettimeofday(&tv);
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148 ngx_time_update(tv.tv_sec);
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149
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150 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "wake up");
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151
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152 if (ngx_reap) {
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153 ngx_reap = 0;
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154 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "reap childs");
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155
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156 live = ngx_reap_childs(cycle);
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157 }
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158
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159 if (!live && (ngx_terminate || ngx_quit)) {
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2
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160 ngx_master_exit(cycle);
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0
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161 }
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162
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163 if (ngx_terminate) {
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164 if (delay == 0) {
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165 delay = 50;
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166 }
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167
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168 if (delay > 1000) {
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169 ngx_signal_worker_processes(cycle, SIGKILL);
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170 } else {
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171 ngx_signal_worker_processes(cycle,
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172 ngx_signal_value(NGX_TERMINATE_SIGNAL));
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173 }
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174
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175 continue;
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176 }
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177
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178 if (ngx_quit) {
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179 ngx_signal_worker_processes(cycle,
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180 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
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181 continue;
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182 }
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183
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184 if (ngx_timer) {
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185 ngx_timer = 0;
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4
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186
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187 if (!ngx_noaccepting) {
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188 ngx_start_worker_processes(cycle, ccf->worker_processes,
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189 NGX_PROCESS_JUST_RESPAWN);
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16
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190 ngx_start_garbage_collector(cycle, NGX_PROCESS_JUST_RESPAWN);
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4
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191 live = 1;
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192 ngx_signal_worker_processes(cycle,
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0
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193 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
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4
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194 }
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0
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195 }
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196
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197 if (ngx_reconfigure) {
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198 ngx_reconfigure = 0;
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199
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200 if (ngx_new_binary) {
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201 ngx_start_worker_processes(cycle, ccf->worker_processes,
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202 NGX_PROCESS_RESPAWN);
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16
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203 ngx_start_garbage_collector(cycle, NGX_PROCESS_RESPAWN);
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0
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204 ngx_noaccepting = 0;
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205
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206 continue;
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207 }
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208
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26
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209 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reconfiguring");
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0
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210
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211 cycle = ngx_init_cycle(cycle);
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212 if (cycle == NULL) {
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213 cycle = (ngx_cycle_t *) ngx_cycle;
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214 continue;
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215 }
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216
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217 ngx_cycle = cycle;
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218 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx,
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219 ngx_core_module);
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220 ngx_start_worker_processes(cycle, ccf->worker_processes,
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221 NGX_PROCESS_JUST_RESPAWN);
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16
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222 ngx_start_garbage_collector(cycle, NGX_PROCESS_JUST_RESPAWN);
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223 live = 1;
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224 ngx_signal_worker_processes(cycle,
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225 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
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226 }
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227
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228 if (ngx_restart) {
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229 ngx_restart = 0;
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230 ngx_start_worker_processes(cycle, ccf->worker_processes,
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231 NGX_PROCESS_RESPAWN);
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16
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232 ngx_start_garbage_collector(cycle, NGX_PROCESS_RESPAWN);
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0
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233 live = 1;
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234 }
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235
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236 if (ngx_reopen) {
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237 ngx_reopen = 0;
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26
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238 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs");
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0
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239 ngx_reopen_files(cycle, ccf->user);
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240 ngx_signal_worker_processes(cycle,
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241 ngx_signal_value(NGX_REOPEN_SIGNAL));
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242 }
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243
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244 if (ngx_change_binary) {
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245 ngx_change_binary = 0;
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26
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246 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "changing binary");
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2
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247 ngx_new_binary = ngx_exec_new_binary(cycle, ngx_argv);
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0
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248 }
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249
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250 if (ngx_noaccept) {
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251 ngx_noaccept = 0;
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252 ngx_noaccepting = 1;
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253 ngx_signal_worker_processes(cycle,
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254 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
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255 }
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256 }
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257 }
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258
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259
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50
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260 void
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261 ngx_single_process_cycle(ngx_cycle_t *cycle)
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0
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262 {
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263 ngx_uint_t i;
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264
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265 ngx_init_temp_number();
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266
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267 for (i = 0; ngx_modules[i]; i++) {
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268 if (ngx_modules[i]->init_process) {
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269 if (ngx_modules[i]->init_process(cycle) == NGX_ERROR) {
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270 /* fatal */
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271 exit(2);
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272 }
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273 }
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274 }
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275
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276 for ( ;; ) {
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277 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle");
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278
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279 ngx_process_events(cycle);
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280
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281 if (ngx_terminate || ngx_quit) {
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2
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282 ngx_master_exit(cycle);
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0
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283 }
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284
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285 if (ngx_reconfigure) {
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286 ngx_reconfigure = 0;
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26
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287 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reconfiguring");
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0
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288
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289 cycle = ngx_init_cycle(cycle);
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290 if (cycle == NULL) {
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291 cycle = (ngx_cycle_t *) ngx_cycle;
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292 continue;
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293 }
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294
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295 ngx_cycle = cycle;
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296 }
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297
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298 if (ngx_reopen) {
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299 ngx_reopen = 0;
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26
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300 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs");
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0
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301 ngx_reopen_files(cycle, (ngx_uid_t) -1);
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302 }
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303 }
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304 }
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305
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306
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50
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307 static void
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308 ngx_start_worker_processes(ngx_cycle_t *cycle, ngx_int_t n, ngx_int_t type)
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0
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309 {
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310 ngx_int_t i;
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311 ngx_channel_t ch;
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312 struct itimerval itv;
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313
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26
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314 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "start worker processes");
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0
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315
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316 ch.command = NGX_CMD_OPEN_CHANNEL;
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317
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318 while (n--) {
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319 ngx_spawn_process(cycle, ngx_worker_process_cycle, NULL,
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320 "worker process", type);
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321
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322 ch.pid = ngx_processes[ngx_process_slot].pid;
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323 ch.slot = ngx_process_slot;
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324 ch.fd = ngx_processes[ngx_process_slot].channel[0];
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325
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326 for (i = 0; i < ngx_last_process; i++) {
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327
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328 if (i == ngx_process_slot
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329 || ngx_processes[i].pid == -1
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330 || ngx_processes[i].channel[0] == -1)
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331 {
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332 continue;
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333 }
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334
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335 ngx_log_debug6(NGX_LOG_DEBUG_CORE, cycle->log, 0,
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10
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336 "pass channel s:%d pid:%P fd:%d to s:%i pid:%P fd:%d",
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337 ch.slot, ch.pid, ch.fd,
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338 i, ngx_processes[i].pid,
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339 ngx_processes[i].channel[0]);
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0
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340
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341 /* TODO: NGX_AGAIN */
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342
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343 ngx_write_channel(ngx_processes[i].channel[0],
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344 &ch, sizeof(ngx_channel_t), cycle->log);
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345 }
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346 }
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347
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348 /*
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349 * we have to limit the maximum life time of the worker processes
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350 * by 10 days because our millisecond event timer is limited
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351 * by 24 days on 32-bit platforms
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352 */
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353
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354 itv.it_interval.tv_sec = 0;
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355 itv.it_interval.tv_usec = 0;
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356 itv.it_value.tv_sec = 10 * 24 * 60 * 60;
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357 itv.it_value.tv_usec = 0;
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358
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359 if (setitimer(ITIMER_REAL, &itv, NULL) == -1) {
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360 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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361 "setitimer() failed");
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362 }
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363 }
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364
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365
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50
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366 static void
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367 ngx_start_garbage_collector(ngx_cycle_t *cycle, ngx_int_t type)
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16
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368 {
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50
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369 #if 0
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370 ngx_int_t i;
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371 ngx_channel_t ch;
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16
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372
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26
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373 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "start garbage collector");
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16
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374
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375 ch.command = NGX_CMD_OPEN_CHANNEL;
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376
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377 ngx_spawn_process(cycle, ngx_garbage_collector_cycle, NULL,
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378 "garbage collector", type);
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379
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380 ch.pid = ngx_processes[ngx_process_slot].pid;
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381 ch.slot = ngx_process_slot;
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382 ch.fd = ngx_processes[ngx_process_slot].channel[0];
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383
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384 for (i = 0; i < ngx_last_process; i++) {
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385
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386 if (i == ngx_process_slot
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387 || ngx_processes[i].pid == -1
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388 || ngx_processes[i].channel[0] == -1)
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389 {
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390 continue;
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391 }
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392
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393 ngx_log_debug6(NGX_LOG_DEBUG_CORE, cycle->log, 0,
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394 "pass channel s:%d pid:%P fd:%d to s:%i pid:%P fd:%d",
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395 ch.slot, ch.pid, ch.fd,
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396 i, ngx_processes[i].pid,
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397 ngx_processes[i].channel[0]);
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398
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399 /* TODO: NGX_AGAIN */
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400
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401 ngx_write_channel(ngx_processes[i].channel[0],
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402 &ch, sizeof(ngx_channel_t), cycle->log);
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403 }
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50
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404 #endif
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16
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405 }
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406
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407
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50
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408 static void
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409 ngx_signal_worker_processes(ngx_cycle_t *cycle, int signo)
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0
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410 {
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411 ngx_int_t i;
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412 ngx_err_t err;
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413 ngx_channel_t ch;
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414
|
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415 switch (signo) {
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416
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417 case ngx_signal_value(NGX_SHUTDOWN_SIGNAL):
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418 ch.command = NGX_CMD_QUIT;
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419 break;
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420
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421 case ngx_signal_value(NGX_TERMINATE_SIGNAL):
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422 ch.command = NGX_CMD_TERMINATE;
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423 break;
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424
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425 case ngx_signal_value(NGX_REOPEN_SIGNAL):
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426 ch.command = NGX_CMD_REOPEN;
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427 break;
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428
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429 default:
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430 ch.command = 0;
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431 }
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432
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433 ch.fd = -1;
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434
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435
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436 for (i = 0; i < ngx_last_process; i++) {
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437
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438 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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10
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439 "child: %d %P e:%d t:%d d:%d r:%d j:%d",
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0
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440 i,
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441 ngx_processes[i].pid,
|
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442 ngx_processes[i].exiting,
|
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443 ngx_processes[i].exited,
|
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444 ngx_processes[i].detached,
|
|
445 ngx_processes[i].respawn,
|
|
446 ngx_processes[i].just_respawn);
|
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447
|
|
448 if (ngx_processes[i].detached || ngx_processes[i].pid == -1) {
|
|
449 continue;
|
|
450 }
|
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451
|
|
452 if (ngx_processes[i].just_respawn) {
|
|
453 ngx_processes[i].just_respawn = 0;
|
|
454 continue;
|
|
455 }
|
|
456
|
|
457 if (ngx_processes[i].exiting
|
|
458 && signo == ngx_signal_value(NGX_SHUTDOWN_SIGNAL))
|
|
459 {
|
|
460 continue;
|
|
461 }
|
|
462
|
|
463 if (ch.command) {
|
|
464 if (ngx_write_channel(ngx_processes[i].channel[0],
|
|
465 &ch, sizeof(ngx_channel_t), cycle->log) == NGX_OK)
|
|
466 {
|
|
467 if (signo != ngx_signal_value(NGX_REOPEN_SIGNAL)) {
|
|
468 ngx_processes[i].exiting = 1;
|
|
469 }
|
|
470
|
|
471 continue;
|
|
472 }
|
|
473 }
|
|
474
|
|
475 ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
10
|
476 "kill (%P, %d)" , ngx_processes[i].pid, signo);
|
0
|
477
|
|
478 if (kill(ngx_processes[i].pid, signo) == -1) {
|
|
479 err = ngx_errno;
|
|
480 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
|
10
|
481 "kill(%P, %d) failed",
|
0
|
482 ngx_processes[i].pid, signo);
|
|
483
|
|
484 if (err == NGX_ESRCH) {
|
|
485 ngx_processes[i].exited = 1;
|
|
486 ngx_processes[i].exiting = 0;
|
|
487 ngx_reap = 1;
|
|
488 }
|
|
489
|
|
490 continue;
|
|
491 }
|
|
492
|
|
493 if (signo != ngx_signal_value(NGX_REOPEN_SIGNAL)) {
|
|
494 ngx_processes[i].exiting = 1;
|
|
495 }
|
|
496 }
|
|
497 }
|
|
498
|
|
499
|
50
|
500 static ngx_uint_t
|
|
501 ngx_reap_childs(ngx_cycle_t *cycle)
|
0
|
502 {
|
|
503 ngx_int_t i, n;
|
|
504 ngx_uint_t live;
|
|
505 ngx_channel_t ch;
|
|
506
|
|
507 ch.command = NGX_CMD_CLOSE_CHANNEL;
|
|
508 ch.fd = -1;
|
|
509
|
|
510 live = 0;
|
|
511 for (i = 0; i < ngx_last_process; i++) {
|
|
512
|
|
513 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
10
|
514 "child: %d %P e:%d t:%d d:%d r:%d j:%d",
|
0
|
515 i,
|
|
516 ngx_processes[i].pid,
|
|
517 ngx_processes[i].exiting,
|
|
518 ngx_processes[i].exited,
|
|
519 ngx_processes[i].detached,
|
|
520 ngx_processes[i].respawn,
|
|
521 ngx_processes[i].just_respawn);
|
|
522
|
|
523 if (ngx_processes[i].pid == -1) {
|
|
524 continue;
|
|
525 }
|
|
526
|
|
527 if (ngx_processes[i].exited) {
|
|
528
|
|
529 if (!ngx_processes[i].detached) {
|
|
530 ngx_close_channel(ngx_processes[i].channel, cycle->log);
|
|
531
|
|
532 ngx_processes[i].channel[0] = -1;
|
|
533 ngx_processes[i].channel[1] = -1;
|
|
534
|
|
535 ch.pid = ngx_processes[i].pid;
|
|
536 ch.slot = i;
|
|
537
|
|
538 for (n = 0; n < ngx_last_process; n++) {
|
|
539 if (ngx_processes[n].exited
|
|
540 || ngx_processes[n].pid == -1
|
|
541 || ngx_processes[n].channel[0] == -1)
|
|
542 {
|
|
543 continue;
|
|
544 }
|
|
545
|
|
546 ngx_log_debug3(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
10
|
547 "pass close channel s:%i pid:%P to:%P",
|
|
548 ch.slot, ch.pid, ngx_processes[n].pid);
|
0
|
549
|
|
550 /* TODO: NGX_AGAIN */
|
|
551
|
|
552 ngx_write_channel(ngx_processes[n].channel[0],
|
|
553 &ch, sizeof(ngx_channel_t), cycle->log);
|
|
554 }
|
|
555 }
|
|
556
|
|
557 if (ngx_processes[i].respawn
|
|
558 && !ngx_processes[i].exiting
|
|
559 && !ngx_terminate
|
|
560 && !ngx_quit)
|
|
561 {
|
|
562 if (ngx_spawn_process(cycle, ngx_processes[i].proc,
|
|
563 ngx_processes[i].data,
|
|
564 ngx_processes[i].name, i)
|
|
565 == NGX_ERROR)
|
|
566 {
|
|
567 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
568 "can not respawn %s", ngx_processes[i].name);
|
|
569 continue;
|
|
570 }
|
|
571
|
22
|
572
|
|
573 ch.command = NGX_CMD_OPEN_CHANNEL;
|
|
574 ch.pid = ngx_processes[ngx_process_slot].pid;
|
|
575 ch.slot = ngx_process_slot;
|
|
576 ch.fd = ngx_processes[ngx_process_slot].channel[0];
|
|
577
|
|
578 for (n = 0; n < ngx_last_process; n++) {
|
|
579
|
|
580 if (n == ngx_process_slot
|
|
581 || ngx_processes[n].pid == -1
|
|
582 || ngx_processes[n].channel[0] == -1)
|
|
583 {
|
|
584 continue;
|
|
585 }
|
|
586
|
|
587 ngx_log_debug6(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
588 "pass channel s:%d pid:%P fd:%d to s:%i pid:%P fd:%d",
|
|
589 ch.slot, ch.pid, ch.fd,
|
|
590 n, ngx_processes[n].pid,
|
|
591 ngx_processes[n].channel[0]);
|
|
592
|
|
593 /* TODO: NGX_AGAIN */
|
|
594
|
|
595 ngx_write_channel(ngx_processes[n].channel[0],
|
|
596 &ch, sizeof(ngx_channel_t), cycle->log);
|
|
597 }
|
|
598
|
0
|
599 live = 1;
|
|
600
|
|
601 continue;
|
|
602 }
|
|
603
|
|
604 if (ngx_processes[i].pid == ngx_new_binary) {
|
|
605 ngx_new_binary = 0;
|
|
606 if (ngx_noaccepting) {
|
|
607 ngx_restart = 1;
|
|
608 ngx_noaccepting = 0;
|
|
609 }
|
|
610 }
|
|
611
|
|
612 if (i == ngx_last_process - 1) {
|
|
613 ngx_last_process--;
|
|
614
|
|
615 } else {
|
|
616 ngx_processes[i].pid = -1;
|
|
617 }
|
|
618
|
|
619 } else if (ngx_processes[i].exiting || !ngx_processes[i].detached) {
|
|
620 live = 1;
|
|
621 }
|
|
622 }
|
|
623
|
|
624 return live;
|
|
625 }
|
|
626
|
|
627
|
50
|
628 static void
|
|
629 ngx_master_exit(ngx_cycle_t *cycle)
|
0
|
630 {
|
|
631 ngx_delete_pidfile(cycle);
|
|
632
|
26
|
633 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exit");
|
0
|
634
|
|
635 ngx_destroy_pool(cycle->pool);
|
|
636
|
|
637 exit(0);
|
|
638 }
|
|
639
|
|
640
|
50
|
641 static void
|
|
642 ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data)
|
0
|
643 {
|
50
|
644 #if (NGX_THREADS)
|
18
|
645 ngx_int_t n;
|
|
646 ngx_err_t err;
|
|
647 ngx_core_conf_t *ccf;
|
50
|
648 #endif
|
18
|
649
|
22
|
650 ngx_worker_process_init(cycle, 1);
|
0
|
651
|
|
652 ngx_setproctitle("worker process");
|
|
653
|
|
654 #if (NGX_THREADS)
|
|
655
|
|
656 if (ngx_time_mutex_init(cycle->log) == NGX_ERROR) {
|
|
657 /* fatal */
|
|
658 exit(2);
|
|
659 }
|
|
660
|
18
|
661 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
|
|
662
|
0
|
663 if (ngx_threads_n) {
|
|
664 if (ngx_init_threads(ngx_threads_n,
|
|
665 ccf->thread_stack_size, cycle) == NGX_ERROR)
|
|
666 {
|
|
667 /* fatal */
|
|
668 exit(2);
|
|
669 }
|
|
670
|
|
671 err = ngx_thread_key_create(&ngx_core_tls_key);
|
|
672 if (err != 0) {
|
|
673 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
|
|
674 ngx_thread_key_create_n " failed");
|
|
675 /* fatal */
|
|
676 exit(2);
|
|
677 }
|
|
678
|
|
679 for (n = 0; n < ngx_threads_n; n++) {
|
|
680
|
50
|
681 ngx_threads[n].cv = ngx_cond_init(cycle->log);
|
|
682
|
|
683 if (ngx_threads[n].cv == NULL) {
|
0
|
684 /* fatal */
|
|
685 exit(2);
|
|
686 }
|
|
687
|
|
688 if (ngx_create_thread((ngx_tid_t *) &ngx_threads[n].tid,
|
|
689 ngx_worker_thread_cycle,
|
|
690 (void *) &ngx_threads[n], cycle->log) != 0)
|
|
691 {
|
|
692 /* fatal */
|
|
693 exit(2);
|
|
694 }
|
|
695 }
|
|
696 }
|
|
697
|
|
698 #endif
|
|
699
|
|
700 for ( ;; ) {
|
|
701 if (ngx_exiting
|
|
702 && ngx_event_timer_rbtree == &ngx_event_timer_sentinel)
|
|
703 {
|
26
|
704 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exiting");
|
0
|
705
|
|
706
|
|
707 #if (NGX_THREADS)
|
|
708 ngx_terminate = 1;
|
|
709
|
|
710 ngx_wakeup_worker_threads(cycle);
|
|
711 #endif
|
|
712
|
26
|
713 if (ngx_debug_quit) {
|
|
714 ngx_debug_point();
|
|
715 }
|
|
716
|
0
|
717 /*
|
|
718 * we do not destroy cycle->pool here because a signal handler
|
|
719 * that uses cycle->log can be called at this point
|
|
720 */
|
|
721 exit(0);
|
|
722 }
|
|
723
|
|
724 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle");
|
|
725
|
|
726 ngx_process_events(cycle);
|
|
727
|
|
728 if (ngx_terminate) {
|
26
|
729 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exiting");
|
0
|
730
|
|
731 #if (NGX_THREADS)
|
|
732 ngx_wakeup_worker_threads(cycle);
|
|
733 #endif
|
|
734
|
|
735 /*
|
|
736 * we do not destroy cycle->pool here because a signal handler
|
|
737 * that uses cycle->log can be called at this point
|
|
738 */
|
|
739 exit(0);
|
|
740 }
|
|
741
|
|
742 if (ngx_quit) {
|
|
743 ngx_quit = 0;
|
26
|
744 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0,
|
0
|
745 "gracefully shutting down");
|
|
746 ngx_setproctitle("worker process is shutting down");
|
|
747
|
|
748 if (!ngx_exiting) {
|
|
749 ngx_close_listening_sockets(cycle);
|
|
750 ngx_exiting = 1;
|
|
751 }
|
|
752 }
|
|
753
|
|
754 if (ngx_reopen) {
|
|
755 ngx_reopen = 0;
|
26
|
756 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs");
|
0
|
757 ngx_reopen_files(cycle, -1);
|
|
758 }
|
|
759 }
|
|
760 }
|
|
761
|
|
762
|
50
|
763 static void
|
|
764 ngx_worker_process_init(ngx_cycle_t *cycle, ngx_uint_t priority)
|
16
|
765 {
|
|
766 sigset_t set;
|
|
767 ngx_int_t n;
|
|
768 ngx_uint_t i;
|
|
769 struct timeval tv;
|
|
770 ngx_core_conf_t *ccf;
|
|
771 ngx_listening_t *ls;
|
|
772
|
|
773 ngx_gettimeofday(&tv);
|
|
774
|
|
775 ngx_start_msec = (ngx_epoch_msec_t) tv.tv_sec * 1000 + tv.tv_usec / 1000;
|
|
776 ngx_old_elapsed_msec = 0;
|
|
777 ngx_elapsed_msec = 0;
|
|
778
|
|
779
|
|
780 ngx_process = NGX_PROCESS_WORKER;
|
|
781
|
|
782 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
|
|
783
|
|
784 if (geteuid() == 0) {
|
22
|
785 if (priority && ccf->priority != 0) {
|
|
786 if (setpriority(PRIO_PROCESS, 0, ccf->priority) == -1) {
|
|
787 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
788 "setpriority(%d) failed", ccf->priority);
|
|
789 }
|
|
790 }
|
|
791
|
16
|
792 if (setgid(ccf->group) == -1) {
|
|
793 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
794 "setgid(%d) failed", ccf->group);
|
|
795 /* fatal */
|
|
796 exit(2);
|
|
797 }
|
|
798
|
22
|
799 if (initgroups(ccf->username, ccf->group) == -1) {
|
|
800 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
801 "initgroups(%s, %d) failed",
|
|
802 ccf->username, ccf->group);
|
|
803 }
|
|
804
|
16
|
805 if (setuid(ccf->user) == -1) {
|
|
806 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
807 "setuid(%d) failed", ccf->user);
|
|
808 /* fatal */
|
|
809 exit(2);
|
|
810 }
|
|
811 }
|
|
812
|
|
813 #if (NGX_HAVE_PR_SET_DUMPABLE)
|
|
814
|
|
815 /* allow coredump after setuid() in Linux 2.4.x */
|
|
816
|
|
817 if (prctl(PR_SET_DUMPABLE, 1, 0, 0, 0) == -1) {
|
|
818 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
819 "prctl(PR_SET_DUMPABLE) failed");
|
|
820 }
|
|
821
|
|
822 #endif
|
|
823
|
|
824 sigemptyset(&set);
|
|
825
|
|
826 if (sigprocmask(SIG_SETMASK, &set, NULL) == -1) {
|
|
827 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
828 "sigprocmask() failed");
|
|
829 }
|
|
830
|
|
831 ngx_init_temp_number();
|
|
832
|
|
833 /*
|
|
834 * disable deleting previous events for the listening sockets because
|
|
835 * in the worker processes there are no events at all at this point
|
|
836 */
|
|
837 ls = cycle->listening.elts;
|
|
838 for (i = 0; i < cycle->listening.nelts; i++) {
|
|
839 ls[i].remain = 0;
|
|
840 }
|
|
841
|
|
842 for (i = 0; ngx_modules[i]; i++) {
|
|
843 if (ngx_modules[i]->init_process) {
|
|
844 if (ngx_modules[i]->init_process(cycle) == NGX_ERROR) {
|
|
845 /* fatal */
|
|
846 exit(2);
|
|
847 }
|
|
848 }
|
|
849 }
|
|
850
|
|
851 for (n = 0; n < ngx_last_process; n++) {
|
|
852
|
|
853 if (ngx_processes[n].pid == -1) {
|
|
854 continue;
|
|
855 }
|
|
856
|
|
857 if (n == ngx_process_slot) {
|
|
858 continue;
|
|
859 }
|
|
860
|
|
861 if (ngx_processes[n].channel[1] == -1) {
|
|
862 continue;
|
|
863 }
|
|
864
|
|
865 if (close(ngx_processes[n].channel[1]) == -1) {
|
|
866 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
867 "close() channel failed");
|
|
868 }
|
|
869 }
|
|
870
|
|
871 if (close(ngx_processes[ngx_process_slot].channel[0]) == -1) {
|
|
872 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
873 "close() channel failed");
|
|
874 }
|
|
875
|
|
876 #if 0
|
|
877 ngx_last_process = 0;
|
|
878 #endif
|
|
879
|
|
880 if (ngx_add_channel_event(cycle, ngx_channel, NGX_READ_EVENT,
|
|
881 ngx_channel_handler) == NGX_ERROR)
|
|
882 {
|
|
883 /* fatal */
|
|
884 exit(2);
|
|
885 }
|
|
886 }
|
|
887
|
|
888
|
50
|
889 static void
|
|
890 ngx_channel_handler(ngx_event_t *ev)
|
0
|
891 {
|
|
892 ngx_int_t n;
|
|
893 ngx_channel_t ch;
|
|
894 ngx_connection_t *c;
|
|
895
|
16
|
896 if (ev->timedout) {
|
|
897 ev->timedout = 0;
|
|
898 return;
|
|
899 }
|
|
900
|
0
|
901 c = ev->data;
|
|
902
|
|
903 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel handler");
|
|
904
|
|
905 n = ngx_read_channel(c->fd, &ch, sizeof(ngx_channel_t), ev->log);
|
|
906
|
10
|
907 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel: %i", n);
|
0
|
908
|
10
|
909 if (n == NGX_ERROR) {
|
|
910 if (close(c->fd) == -1) {
|
|
911 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
912 "close() channel failed");
|
|
913 }
|
|
914
|
|
915 c->fd = -1;
|
|
916 return;
|
|
917 }
|
|
918
|
|
919 if (n == NGX_AGAIN) {
|
0
|
920 return;
|
|
921 }
|
|
922
|
|
923 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0,
|
|
924 "channel command: %d", ch.command);
|
|
925
|
|
926 switch (ch.command) {
|
|
927
|
|
928 case NGX_CMD_QUIT:
|
|
929 ngx_quit = 1;
|
|
930 break;
|
|
931
|
|
932 case NGX_CMD_TERMINATE:
|
|
933 ngx_terminate = 1;
|
|
934 break;
|
|
935
|
|
936 case NGX_CMD_REOPEN:
|
|
937 ngx_reopen = 1;
|
|
938 break;
|
|
939
|
|
940 case NGX_CMD_OPEN_CHANNEL:
|
|
941
|
|
942 ngx_log_debug3(NGX_LOG_DEBUG_CORE, ev->log, 0,
|
10
|
943 "get channel s:%i pid:%P fd:%d", ch.slot, ch.pid, ch.fd);
|
0
|
944
|
|
945 ngx_processes[ch.slot].pid = ch.pid;
|
|
946 ngx_processes[ch.slot].channel[0] = ch.fd;
|
|
947 break;
|
|
948
|
|
949 case NGX_CMD_CLOSE_CHANNEL:
|
|
950
|
|
951 ngx_log_debug4(NGX_LOG_DEBUG_CORE, ev->log, 0,
|
10
|
952 "close channel s:%i pid:%P our:%P fd:%d",
|
0
|
953 ch.slot, ch.pid, ngx_processes[ch.slot].pid,
|
|
954 ngx_processes[ch.slot].channel[0]);
|
|
955
|
|
956 if (close(ngx_processes[ch.slot].channel[0]) == -1) {
|
16
|
957 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
958 "close() channel failed");
|
0
|
959 }
|
|
960
|
|
961 ngx_processes[ch.slot].channel[0] = -1;
|
|
962 break;
|
|
963 }
|
|
964 }
|
|
965
|
|
966
|
|
967 #if (NGX_THREADS)
|
|
968
|
50
|
969 static void
|
|
970 ngx_wakeup_worker_threads(ngx_cycle_t *cycle)
|
0
|
971 {
|
|
972 ngx_int_t i;
|
|
973 ngx_uint_t live;
|
|
974
|
|
975 for ( ;; ) {
|
|
976
|
|
977 live = 0;
|
|
978
|
|
979 for (i = 0; i < ngx_threads_n; i++) {
|
|
980 if (ngx_threads[i].state < NGX_THREAD_EXIT) {
|
18
|
981 if (ngx_cond_signal(ngx_threads[i].cv) == NGX_ERROR) {
|
|
982 ngx_threads[i].state = NGX_THREAD_DONE;
|
0
|
983
|
|
984 } else {
|
|
985 live = 1;
|
|
986 }
|
|
987 }
|
|
988
|
|
989 if (ngx_threads[i].state == NGX_THREAD_EXIT) {
|
|
990 ngx_thread_join(ngx_threads[i].tid, NULL);
|
|
991 ngx_threads[i].state = NGX_THREAD_DONE;
|
|
992 }
|
|
993 }
|
|
994
|
|
995 if (live == 0) {
|
|
996 ngx_log_debug0(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
997 "all worker threads are joined");
|
|
998
|
|
999 /* STUB */
|
|
1000 ngx_done_events(cycle);
|
|
1001 ngx_mutex_destroy(ngx_event_timer_mutex);
|
|
1002 ngx_mutex_destroy(ngx_posted_events_mutex);
|
|
1003
|
|
1004 return;
|
|
1005 }
|
|
1006
|
|
1007 ngx_sched_yield();
|
|
1008 }
|
|
1009 }
|
|
1010
|
|
1011
|
50
|
1012 static void *
|
|
1013 ngx_worker_thread_cycle(void *data)
|
0
|
1014 {
|
|
1015 ngx_thread_t *thr = data;
|
|
1016
|
|
1017 sigset_t set;
|
|
1018 ngx_err_t err;
|
|
1019 ngx_core_tls_t *tls;
|
|
1020 ngx_cycle_t *cycle;
|
|
1021
|
|
1022 cycle = (ngx_cycle_t *) ngx_cycle;
|
|
1023
|
|
1024 sigemptyset(&set);
|
|
1025 sigaddset(&set, ngx_signal_value(NGX_RECONFIGURE_SIGNAL));
|
|
1026 sigaddset(&set, ngx_signal_value(NGX_REOPEN_SIGNAL));
|
|
1027 sigaddset(&set, ngx_signal_value(NGX_CHANGEBIN_SIGNAL));
|
|
1028
|
|
1029 err = ngx_thread_sigmask(SIG_BLOCK, &set, NULL);
|
|
1030 if (err) {
|
|
1031 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
|
|
1032 ngx_thread_sigmask_n " failed");
|
|
1033 return (void *) 1;
|
|
1034 }
|
|
1035
|
|
1036 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
10
|
1037 "thread " NGX_TID_T_FMT " started", ngx_thread_self());
|
0
|
1038
|
|
1039 ngx_setthrtitle("worker thread");
|
|
1040
|
50
|
1041 tls = ngx_calloc(sizeof(ngx_core_tls_t), cycle->log);
|
|
1042 if (tls == NULL) {
|
0
|
1043 return (void *) 1;
|
|
1044 }
|
|
1045
|
|
1046 err = ngx_thread_set_tls(ngx_core_tls_key, tls);
|
|
1047 if (err != 0) {
|
|
1048 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
|
|
1049 ngx_thread_set_tls_n " failed");
|
|
1050 return (void *) 1;
|
|
1051 }
|
|
1052
|
|
1053 if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_ERROR) {
|
|
1054 return (void *) 1;
|
|
1055 }
|
|
1056
|
|
1057 for ( ;; ) {
|
|
1058 thr->state = NGX_THREAD_FREE;
|
|
1059
|
|
1060 if (ngx_cond_wait(thr->cv, ngx_posted_events_mutex) == NGX_ERROR) {
|
|
1061 return (void *) 1;
|
|
1062 }
|
|
1063
|
|
1064 if (ngx_terminate) {
|
|
1065 thr->state = NGX_THREAD_EXIT;
|
|
1066
|
|
1067 ngx_mutex_unlock(ngx_posted_events_mutex);
|
|
1068
|
|
1069 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
10
|
1070 "thread " NGX_TID_T_FMT " is done",
|
|
1071 ngx_thread_self());
|
0
|
1072
|
|
1073 return (void *) 0;
|
|
1074 }
|
|
1075
|
|
1076 thr->state = NGX_THREAD_BUSY;
|
|
1077
|
|
1078 if (ngx_event_thread_process_posted(cycle) == NGX_ERROR) {
|
|
1079 return (void *) 1;
|
|
1080 }
|
|
1081
|
|
1082 if (ngx_event_thread_process_posted(cycle) == NGX_ERROR) {
|
|
1083 return (void *) 1;
|
|
1084 }
|
|
1085
|
|
1086 if (ngx_process_changes) {
|
|
1087 if (ngx_process_changes(cycle, 1) == NGX_ERROR) {
|
|
1088 return (void *) 1;
|
|
1089 }
|
|
1090 }
|
|
1091 }
|
|
1092 }
|
|
1093
|
|
1094 #endif
|
16
|
1095
|
|
1096
|
50
|
1097 #if 0
|
|
1098
|
|
1099 static void
|
|
1100 ngx_garbage_collector_cycle(ngx_cycle_t *cycle, void *data)
|
16
|
1101 {
|
|
1102 ngx_uint_t i;
|
|
1103 ngx_gc_t ctx;
|
|
1104 ngx_path_t **path;
|
|
1105 ngx_event_t *ev;
|
|
1106
|
22
|
1107 ngx_worker_process_init(cycle, 0);
|
16
|
1108
|
|
1109 ev = &cycle->read_events[ngx_channel];
|
|
1110
|
|
1111 ngx_accept_mutex = NULL;
|
|
1112
|
|
1113 ngx_setproctitle("garbage collector");
|
|
1114
|
|
1115 #if 0
|
|
1116 ngx_add_timer(ev, 60 * 1000);
|
|
1117 #endif
|
|
1118
|
|
1119 for ( ;; ) {
|
|
1120
|
|
1121 if (ngx_terminate || ngx_quit) {
|
26
|
1122 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exiting");
|
16
|
1123 exit(0);
|
|
1124 }
|
|
1125
|
|
1126 if (ngx_reopen) {
|
|
1127 ngx_reopen = 0;
|
26
|
1128 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs");
|
16
|
1129 ngx_reopen_files(cycle, -1);
|
|
1130 }
|
|
1131
|
|
1132 path = cycle->pathes.elts;
|
|
1133 for (i = 0; i < cycle->pathes.nelts; i++) {
|
|
1134 ctx.path = path[i];
|
|
1135 ctx.log = cycle->log;
|
28
|
1136 ctx.handler = path[i]->cleaner;
|
16
|
1137
|
|
1138 ngx_collect_garbage(&ctx, &path[i]->name, 0);
|
|
1139 }
|
|
1140
|
|
1141 ngx_add_timer(ev, 60 * 60 * 1000);
|
|
1142
|
|
1143 ngx_process_events(cycle);
|
|
1144 }
|
|
1145 }
|
50
|
1146
|
|
1147 #endif
|