[patch]fork: subprocess quit when parent died

[李林哲]

# 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;