From: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>
Date: Tue, 7 Mar 2023 16:31:52 +0000 (-0300)
Subject: posix: Ensure the initial signal disposition for tst-spawn7
X-Git-Tag: glibc-2.38~497
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=65387e48097077c71ed527457c59ba59f3a1f3ee;p=thirdparty%2Fglibc.git

posix: Ensure the initial signal disposition for tst-spawn7

To avoid possible failure if any parent set any initial signal
disposition as SIG_IGN (for instance if the testcase is issued
with nohup).

Checked on x86_64-linux-gnu.
Tested-by: Florian Weimer <fweimer@redhat.com>
Reviewed-by: Florian Weimer <fweimer@redhat.com>
---

diff --git a/posix/tst-spawn7.c b/posix/tst-spawn7.c
index fedb09fb944..fb06915cb7e 100644
--- a/posix/tst-spawn7.c
+++ b/posix/tst-spawn7.c
@@ -99,6 +99,12 @@ dummy_sa_handler (int signal)
 static void
 do_test_signals (void)
 {
+  /* Ensure the initial signal disposition, ignore EINVAL for internal
+     signal such as SIGCANCEL.  */
+  for (int sig = 1; sig < _NSIG; ++sig)
+    sigaction (sig, &(struct sigaction) { .sa_handler = SIG_DFL,
+					  .sa_flags = 0 }, NULL);
+
   {
     /* Check if all signals handler are set to SIG_DFL on spawned process.  */
     spawn_signal_test ("SIG_DFL", NULL);