Reset signal mask before executing commands (issue #674)

src/signals.c

@@ -24,6 +24,16 @@ void signal_handler(int sig)
     signal_pending = sig;
 }
 
+void reset_signals()
+{
+    for (int sig = 1; sig < 32; sig++) {
+        signal(sig, SIG_DFL);
+    }
+    sigset_t signal_set;
+    sigemptyset(&signal_set);
+    sigprocmask(SIG_SETMASK, &signal_set, NULL);
+}
+
 void init_signals()
 {
     // Set signal handlers

src/signals.h

@@ -5,6 +5,7 @@ void init_signals();
 void init_signals_postconfig();
 void emit_self_restart(const char *reason);
 int get_signal_pending();
+void reset_signals();
 
 void handle_sigchld_events();
 

src/util/common.c

@@ -59,6 +59,7 @@
 
 #include "../panel.h"
 #include "timer.h"
+#include "signals.h"
 
 void write_string(int fd, const char *s)
 {
@@ -398,6 +399,7 @@ pid_t tint_exec(const char *command,
         if (dir)
             chdir(dir);
         close_all_fds();
+        reset_signals();
         if (terminal) {
 #if !defined(__OpenBSD__)
             fprintf(stderr, "tint2: executing in x-terminal-emulator: %s\n", command);