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annotate src/os/unix/ngx_daemon.c @ 9277:4a0cd107c0f1 default tip

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HTTP/2: handling of connections initialized during shutdown. If an HTTP/2 connection opened before a graceful shutdown, but ngx_http_v2_init() is called after idle connections were closed, such a connection ended up being open till closed by the client (or up to keepalive_time), delaying shutdown. With this change, such connections are allowed to serve just one request, much like it happens in HTTP/1.x, and closed afterwards. Reported by Kasei Wang, https://freenginx.org/pipermail/nginx-devel/2024-May/000277.html
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 28 May 2024 20:43:50 +0300
parents 3d455e37abf8
children
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rev   line source
441
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
parents: 249
diff changeset
1
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
parents: 249
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2 /*
444
42d11f017717 nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
Igor Sysoev <igor@sysoev.ru>
parents: 441
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3 * Copyright (C) Igor Sysoev
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d620f497c50f Copyright updated.
Maxim Konovalov <maxim@nginx.com>
parents: 499
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4 * Copyright (C) Nginx, Inc.
441
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
parents: 249
diff changeset
5 */
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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parents: 249
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6
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3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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7
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
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8 #include <ngx_config.h>
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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9 #include <ngx_core.h>
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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11
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12 static ngx_fd_t ngx_daemon_fd = NGX_INVALID_FILE;
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13
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14
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15 ngx_int_t
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16 ngx_daemon(ngx_log_t *log)
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3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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17 {
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18 u_char buf[1];
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19 ssize_t n;
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20 ngx_fd_t fd, pp[2];
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21
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22 if (pipe(pp) == -1) {
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23 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "pipe() failed");
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24 return NGX_ERROR;
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25 }
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26
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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27 switch (fork()) {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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28 case -1:
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71ce40b3c37b nginx-0.0.1-2003-11-19-19:26:41 import
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29 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "fork() failed");
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3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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30 return NGX_ERROR;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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31
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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32 case 0:
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33 if (close(pp[0]) == -1) {
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34 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "close() pipe failed");
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35 return NGX_ERROR;
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36 }
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37
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38 ngx_daemon_fd = pp[1];
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3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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39 break;
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40
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41 default:
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42 if (close(pp[1]) == -1) {
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43 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "close() pipe failed");
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44 return NGX_ERROR;
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45 }
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46
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47 n = read(pp[0], buf, 1);
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48
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49 if (n == 0) {
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50 /* child exited */
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51 return NGX_ERROR;
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52 }
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53
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54 if (n != 1) {
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55 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
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56 "read() pipe failed");
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57 return NGX_ERROR;
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58 }
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59
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60 if (close(pp[0]) == -1) {
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61 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "close() pipe failed");
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62 return NGX_ERROR;
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63 }
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64
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65 exit(0);
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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66 }
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67
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8b84d60ef13d Fixed "changing binary" when reaper is not init.
Ruslan Ermilov <ru@nginx.com>
parents: 4574
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68 ngx_parent = ngx_pid;
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2a0540287298 nginx-0.0.2-2004-02-03-19:43:54 import
Igor Sysoev <igor@sysoev.ru>
parents: 191
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69 ngx_pid = ngx_getpid();
2a0540287298 nginx-0.0.2-2004-02-03-19:43:54 import
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parents: 191
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70
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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parents:
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71 if (setsid() == -1) {
191
71ce40b3c37b nginx-0.0.1-2003-11-19-19:26:41 import
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parents: 105
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72 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "setsid() failed");
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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73 return NGX_ERROR;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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parents:
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74 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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75
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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76 umask(0);
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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77
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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78 fd = open("/dev/null", O_RDWR);
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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79 if (fd == -1) {
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71ce40b3c37b nginx-0.0.1-2003-11-19-19:26:41 import
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parents: 105
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80 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
71ce40b3c37b nginx-0.0.1-2003-11-19-19:26:41 import
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parents: 105
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81 "open(\"/dev/null\") failed");
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82 return NGX_ERROR;
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83 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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84
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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85 if (dup2(fd, STDIN_FILENO) == -1) {
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71ce40b3c37b nginx-0.0.1-2003-11-19-19:26:41 import
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parents: 105
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86 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "dup2(STDIN) failed");
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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87 return NGX_ERROR;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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88 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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89
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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90 if (dup2(fd, STDOUT_FILENO) == -1) {
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71ce40b3c37b nginx-0.0.1-2003-11-19-19:26:41 import
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91 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "dup2(STDOUT) failed");
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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92 return NGX_ERROR;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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93 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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94
105
00bee6e7b485 nginx-0.0.1-2003-06-15-22:32:13 import
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95 #if 0
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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96 if (dup2(fd, STDERR_FILENO) == -1) {
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71ce40b3c37b nginx-0.0.1-2003-11-19-19:26:41 import
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parents: 105
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97 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "dup2(STDERR) failed");
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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98 return NGX_ERROR;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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99 }
105
00bee6e7b485 nginx-0.0.1-2003-06-15-22:32:13 import
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100 #endif
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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101
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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102 if (fd > STDERR_FILENO) {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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103 if (close(fd) == -1) {
191
71ce40b3c37b nginx-0.0.1-2003-11-19-19:26:41 import
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parents: 105
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104 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "close() failed");
86
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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105 return NGX_ERROR;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
Igor Sysoev <igor@sysoev.ru>
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106 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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107 }
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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108
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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109 return NGX_OK;
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110 }
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111
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112
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113 ngx_int_t
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114 ngx_daemon_sync(ngx_log_t *log)
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115 {
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116 if (ngx_daemon_fd == NGX_INVALID_FILE) {
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117 return NGX_OK;
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118 }
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119
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120 if (write(ngx_daemon_fd, "", 1) != 1) {
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121 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "write() pipe failed");
3d455e37abf8 Core: PID file writing synchronization.
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122 return NGX_ERROR;
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123 }
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124
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125 if (close(ngx_daemon_fd) == -1) {
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126 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "close() pipe failed");
3d455e37abf8 Core: PID file writing synchronization.
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127 return NGX_ERROR;
3d455e37abf8 Core: PID file writing synchronization.
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128 }
3d455e37abf8 Core: PID file writing synchronization.
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129
3d455e37abf8 Core: PID file writing synchronization.
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130 ngx_daemon_fd = NGX_INVALID_FILE;
3d455e37abf8 Core: PID file writing synchronization.
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131
3d455e37abf8 Core: PID file writing synchronization.
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132 return NGX_OK;
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133 }