From: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>
Date: Thu, 12 Jan 2023 13:58:48 +0000 (-0300)
Subject: linux: Do not reset signal handler in posix_spawn if it is already SIG_DFL
X-Git-Tag: glibc-2.38~657
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ff9ffc805f5859f9f1fe3a006967b4cf7b191bb2;p=thirdparty%2Fglibc.git

linux: Do not reset signal handler in posix_spawn if it is already SIG_DFL

There is no need to issue another sigaction if the disposition is
already SIG_DFL.

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
---

diff --git a/sysdeps/unix/sysv/linux/spawni.c b/sysdeps/unix/sysv/linux/spawni.c
index b7a6fe320d8..a1a14a58ae8 100644
--- a/sysdeps/unix/sysv/linux/spawni.c
+++ b/sysdeps/unix/sysv/linux/spawni.c
@@ -129,7 +129,7 @@ __spawni_child (void *arguments)
 	  else
 	    {
 	      __libc_sigaction (sig, 0, &sa);
-	      if (sa.sa_handler == SIG_IGN)
+	      if (sa.sa_handler == SIG_IGN || sa.sa_handler == SIG_DFL)
 		continue;
 	      sa.sa_handler = SIG_DFL;
 	    }