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annotate src/os/unix/ngx_daemon.c @ 4500:9dfe02dd0f11

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Added msleep() on reload to allow new processes to start. This is expected to ensure smoother operation on reload (and with less chance of listen queue overflows). Prodded by Igor Sysoev.
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 28 Feb 2012 11:40:18 +0000
parents d620f497c50f
children b1ba43f905f8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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2 /*
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42d11f017717 nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
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3 * Copyright (C) Igor Sysoev
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d620f497c50f Copyright updated.
Maxim Konovalov <maxim@nginx.com>
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4 * Copyright (C) Nginx, Inc.
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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5 */
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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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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3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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11
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64d9afb209da nginx-0.1.24-RELEASE import
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12 ngx_int_t ngx_daemon(ngx_log_t *log)
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13 {
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14 int fd;
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15
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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16 switch (fork()) {
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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17 case -1:
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71ce40b3c37b nginx-0.0.1-2003-11-19-19:26:41 import
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18 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "fork() failed");
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19 return NGX_ERROR;
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20
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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21 case 0:
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22 break;
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23
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24 default:
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25 exit(0);
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26 }
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27
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2a0540287298 nginx-0.0.2-2004-02-03-19:43:54 import
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28 ngx_pid = ngx_getpid();
2a0540287298 nginx-0.0.2-2004-02-03-19:43:54 import
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29
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3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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30 if (setsid() == -1) {
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31 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "setsid() failed");
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32 return NGX_ERROR;
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33 }
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34
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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35 umask(0);
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36
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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37 fd = open("/dev/null", O_RDWR);
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38 if (fd == -1) {
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71ce40b3c37b nginx-0.0.1-2003-11-19-19:26:41 import
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39 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
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40 "open(\"/dev/null\") failed");
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41 return NGX_ERROR;
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42 }
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43
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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44 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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45 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "dup2(STDIN) failed");
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46 return NGX_ERROR;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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47 }
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48
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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49 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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50 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "dup2(STDOUT) failed");
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51 return NGX_ERROR;
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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52 }
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53
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00bee6e7b485 nginx-0.0.1-2003-06-15-22:32:13 import
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54 #if 0
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55 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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56 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "dup2(STDERR) failed");
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57 return NGX_ERROR;
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58 }
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00bee6e7b485 nginx-0.0.1-2003-06-15-22:32:13 import
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59 #endif
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60
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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61 if (fd > STDERR_FILENO) {
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62 if (close(fd) == -1) {
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71ce40b3c37b nginx-0.0.1-2003-11-19-19:26:41 import
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63 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "close() failed");
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64 return NGX_ERROR;
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65 }
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66 }
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67
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68 return NGX_OK;
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69 }