* process.c (rb_f_system): block SIGCHLD during the process

  execution, like glibc system(3) does.  [ruby-talk:202361]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@10563 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 14 insertions, 4 deletions

diff --git a/process.c b/process.c
index 1989f017d9..ae9146a928 100644
--- a/process.c
+++ b/process.c
@@ -1583,18 +1583,28 @@ rb_spawn(int argc, VALUE *argv)
  *     *
  */
 
+#if defined(SIGCLD) && !defined(SIGCHLD)
+# define SIGCHLD SIGCLD
+#endif
+
 static VALUE
 rb_f_system(int argc, VALUE *argv)
 {
     int status;
+    RETSIGTYPE (*chfunc)(int);
 
+    chfunc = signal(SIGCHLD, SIG_DFL);
     status = rb_spawn(argc, argv);
-    if (status == -1) rb_sys_fail(RSTRING(argv[0])->ptr);
+    if (status > 0) {
 #if defined(HAVE_FORK) || defined(HAVE_SPAWNV)
-    rb_syswait(status);
-    if (NIL_P(rb_last_status)) rb_sys_fail(0);
-    status = NUM2INT(rb_last_status);
+	rb_syswait(status);
 #endif
+    }
+    signal(SIGCHLD, chfunc);
+    if (status < 0) {
+	rb_sys_fail(RSTRING(argv[0])->ptr);
+    }
+    status = NUM2INT(rb_last_status);
     if (status == EXIT_SUCCESS) return Qtrue;
     return Qfalse;
 }