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annotate src/os/unix/ngx_daemon.c @ 4244:df9d3dd8cfc0 stable-1.0

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Merging r4020: SIGWINCH/NOACCEPT signal is disabled now in non-daemon mode. Non-daemon mode is currently used by supervisord, daemontools and so on or during debugging. The NOACCEPT signal is only used for online upgrade which is not supported when nginx is run under supervisord, etc., so this change should not break existant setups.
author Igor Sysoev <igor@sysoev.ru>
date Tue, 01 Nov 2011 11:26:56 +0000
parents 64d9afb209da
children d620f497c50f
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
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1
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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4 */
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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64d9afb209da nginx-0.1.24-RELEASE import
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11 ngx_int_t ngx_daemon(ngx_log_t *log)
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12 {
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13 int fd;
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14
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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15 switch (fork()) {
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16 case -1:
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17 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "fork() failed");
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18 return NGX_ERROR;
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19
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20 case 0:
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21 break;
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22
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23 default:
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24 exit(0);
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25 }
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26
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2a0540287298 nginx-0.0.2-2004-02-03-19:43:54 import
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27 ngx_pid = ngx_getpid();
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28
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29 if (setsid() == -1) {
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30 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "setsid() failed");
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31 return NGX_ERROR;
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32 }
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33
3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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34 umask(0);
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35
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36 fd = open("/dev/null", O_RDWR);
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37 if (fd == -1) {
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38 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
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39 "open(\"/dev/null\") failed");
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40 return NGX_ERROR;
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41 }
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3973260705cc nginx-0.0.1-2003-05-12-19:52:24 import
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43 if (dup2(fd, STDIN_FILENO) == -1) {
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44 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "dup2(STDIN) failed");
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45 return NGX_ERROR;
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46 }
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47
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48 if (dup2(fd, STDOUT_FILENO) == -1) {
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49 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "dup2(STDOUT) failed");
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50 return NGX_ERROR;
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51 }
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52
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53 #if 0
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54 if (dup2(fd, STDERR_FILENO) == -1) {
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55 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "dup2(STDERR) failed");
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56 return NGX_ERROR;
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57 }
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58 #endif
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59
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60 if (fd > STDERR_FILENO) {
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61 if (close(fd) == -1) {
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62 ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "close() failed");
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63 return NGX_ERROR;
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64 }
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65 }
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66
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67 return NGX_OK;
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68 }