From: Bruno Haible <bruno@clisp.org>
Date: Thu, 16 Apr 2026 12:14:38 +0000 (+0200)
Subject: sigdelay, posix-spawn-internal: Ignore out-of-range signal numbers.
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9bb54c2fe5d2ffe5fc44085f32e7d2cde31c18f8;p=thirdparty%2Fgnulib.git

sigdelay, posix-spawn-internal: Ignore out-of-range signal numbers.

* lib/sigdelay.c (sigdelay): Do nothing when sigismember() returns -1.
* lib/spawni.c (__spawni): Likewise.
---

diff --git a/ChangeLog b/ChangeLog
index 67e90f524b..55f69d5198 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2026-04-16  Bruno Haible  <bruno@clisp.org>
+
+	sigdelay, posix-spawn-internal: Ignore out-of-range signal numbers.
+	* lib/sigdelay.c (sigdelay): Do nothing when sigismember() returns -1.
+	* lib/spawni.c (__spawni): Likewise.
+
 2026-04-16  Bruno Haible  <bruno@clisp.org>
 
 	sigprocmask: Fix sigismember function.
diff --git a/lib/sigdelay.c b/lib/sigdelay.c
index d69fa6126b..ea0292ff90 100644
--- a/lib/sigdelay.c
+++ b/lib/sigdelay.c
@@ -76,7 +76,7 @@ sigdelay (int how, const sigset_t *restrict set, sigset_t *restrict old_set)
         sigaddset (old_set, sig);
 
   for (int sig = 1; sig < countof (states); sig++)
-    if (sigismember (set, sig))
+    if (sigismember (set, sig) > 0)
       {
         switch (how)
           {
diff --git a/lib/spawni.c b/lib/spawni.c
index 9e34e95c11..2ed0c69652 100644
--- a/lib/spawni.c
+++ b/lib/spawni.c
@@ -956,7 +956,7 @@ __spawni (pid_t *pid, const char *file,
       sa.sa_handler = SIG_DFL;
 
       for (int sig = 1; sig < NSIG; ++sig)
-        if (sigismember (&attrp->_sd, sig) != 0
+        if (sigismember (&attrp->_sd, sig) > 0
             && sigaction (sig, &sa, NULL) != 0)
           _exit (SPAWN_ERROR);