Unblock signals for pre/post/ready/cleanup scripts

The service_fork() function blocks all signals for the new process, it
is up to the callee to call sig_unblock() before calling exec().

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

ChangeLog.md

@@ -20,6 +20,8 @@ All relevant changes are documented in this file.
    the default `SIGTERM`
  - Fix pre/post/ready/cleanup script execution if service has an
    optional `env:file` (leading `-`)
+ - Fix blocked signals for pre/post/ready/cleanup scripts preventing
+   normal shutdown when a service/sysv is stopped in its setup state
 
 
 [4.10][] - 2025-03-03

src/service.c

@@ -2155,6 +2155,8 @@ static void service_pre_script(svc_t *svc)
 			strlcpy(buf, svc->pre_script, sizeof(buf));
 
 		set_pre_post_envs(svc, "pre");
+		sig_unblock();
+
 		execvp(_PATH_BSHELL, argv);
 		_exit(EX_OSERR);
 	}
@@ -2192,6 +2194,7 @@ static void service_post_script(svc_t *svc)
 		else
 			strlcpy(buf, svc->post_script, sizeof(buf));
 		set_pre_post_envs(svc, "post");
+		sig_unblock();
 
 		if (WIFEXITED(svc->status)) {
 			char val[4];
@@ -2253,6 +2256,8 @@ void service_ready_script(svc_t *svc)
 			strlcpy(buf, svc->ready_script, sizeof(buf));
 
 		set_pre_post_envs(svc, "ready");
+		sig_unblock();
+
 		execvp(_PATH_BSHELL, argv);
 		_exit(EX_OSERR);
 	}
@@ -2289,6 +2294,8 @@ static void service_cleanup_script(svc_t *svc)
 			strlcpy(buf, svc->cleanup_script, sizeof(buf));
 
 		set_pre_post_envs(svc, "cleanup");
+		sig_unblock();
+
 		execvp(_PATH_BSHELL, argv);
 		_exit(EX_OSERR);
 	}