scc

commit 65e5c373ca2fa947a604a1e0ea35843c8c104658
parent 93e07bb34a825734d760971f811ac43868fd8c48
Author: Roberto E. Vargas Caballero <k0ga@shike2.net>
Date:   Tue, 28 Oct 2025 21:12:08 +0100

make: Use a local signal variable

As the global stop variable is used in cleanup() we can be
caught by one signal when we enter in cleanup but stop can
be pointing to a different signal at the end of that function.

Diffstat:
M
src/cmd/scc-make/rules.c
 | 
9
+++++----

1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/src/cmd/scc-make/rules.c b/src/cmd/scc-make/rules.c
@@ -62,10 +62,11 @@ lookup(char *name)
 static void
 cleanup(Target *tp)
 {
-	int precious;
+	int sig, precious;
 	Target *p, **q;
 
-	printf("make: signal %d arrived\n", stop);
+	sig = stop;
+	printf("make: signal %d arrived\n", sig);
 
 	precious = 0;
 	p = lookup(".PRECIOUS");
@@ -81,8 +82,8 @@ cleanup(Target *tp)
 		remove(tp->name);
 	}
 
-	signal(stop, SIG_DFL);
-	raise(stop);
+	signal(sig, SIG_DFL);
+	raise(sig);
 }
 
 static int