[patch]fork: subprocess quit when parent died

[Maxim Dounin]

Hello!

On Wed, Oct 12, 2016 at 08:44:25PM +0800, 李林哲 wrote:

> # HG changeset patch
> # User lilinzhe <llz at antiy.cn>
> # Date 1476275566 -28800
> # Node ID 07d294d39cc6ec07769c1a72d5ee9b7da27b9ce1
> # Parent  7cdf69d012f02a80c94d930b29c71847e203e4d6
> fork: subprocess quit when parent died
> 
> diff -r 7cdf69d012f0 -r 07d294d39cc6 auto/os/linux
> --- a/auto/os/linux Tue Oct 11 18:03:01 2016 +0300
> +++ b/auto/os/linux Wed Oct 12 20:32:46 2016 +0800
> @@ -157,6 +157,18 @@
>  . auto/feature
>  
>  
> +# prctl(PR_SET_PDEATHSIG)
> +
> +ngx_feature="prctl(PR_SET_PDEATHSIG)"
> +ngx_feature_name="NGX_HAVE_PR_SET_PDEATHSIG"
> +ngx_feature_run=yes
> +ngx_feature_incs="#include <sys/prctl.h>
> +                  #include <signal.h>"
> +ngx_feature_path=
> +ngx_feature_libs=
> +ngx_feature_test="if (prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0) == -1) return 1"
> +. auto/feature
> +
>  # sched_setaffinity()
>  
>  ngx_feature="sched_setaffinity()"
> diff -r 7cdf69d012f0 -r 07d294d39cc6 src/os/unix/ngx_daemon.c
> --- a/src/os/unix/ngx_daemon.c Tue Oct 11 18:03:01 2016 +0300
> +++ b/src/os/unix/ngx_daemon.c Wed Oct 12 20:32:46 2016 +0800
> @@ -26,6 +26,13 @@
>          exit(0);
>      }
>  
> +    #if(NGX_HAVE_PR_SET_PDEATHSIG)
> +        if(prctl(PR_SET_PDEATHSIG, SIGTERM, 0,0,0) == -1){
> +            ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "prctl PR_SET_PDEATHSIG failed");
> +            return NGX_ERROR;
> +        }
> +    #endif
> +
>      ngx_pid = ngx_getpid();
>  
>      if (setsid() == -1) {
> diff -r 7cdf69d012f0 -r 07d294d39cc6 src/os/unix/ngx_process.c
> --- a/src/os/unix/ngx_process.c Tue Oct 11 18:03:01 2016 +0300
> +++ b/src/os/unix/ngx_process.c Wed Oct 12 20:32:46 2016 +0800
> @@ -195,6 +195,13 @@
>  
>      case 0:
>          ngx_pid = ngx_getpid();
> +
> +        #if(NGX_HAVE_PR_SET_PDEATHSIG)
> +            if(prctl(PR_SET_PDEATHSIG, SIGTERM, 0,0,0) == -1){
> +                ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, "prctl PR_SET_PDEATHSIG failed");
> +                return NGX_ERROR;
> +            }
> +        #endif
>          proc(cycle, data);
>          break;

It is not clear what problem you are trying to solve.

-- 
Maxim Dounin
http://nginx.org/