Add support for re-exec'ing with SIGHUP; equivalent to the already built-in

'restart' function.

calmwm.c

@@ -82,6 +82,8 @@ main(int argc, char **argv)
 
 	if (signal(SIGCHLD, sighdlr) == SIG_ERR)
 		err(1, "signal");
+	if (signal(SIGHUP, sighdlr) == SIG_ERR)
+		err(1, "signal");
 
 	Conf.homedir = getenv("HOME");
 	if ((Conf.homedir == NULL) || (Conf.homedir[0] == '\0')) {
@@ -221,6 +223,9 @@ sighdlr(int sig)
 		    (pid < 0 && errno == EINTR))
 			;
 		break;
+	case SIGHUP:
+		cwm_status = CWM_EXEC_WM;
+		break;
 	}
 
 	errno = save_errno;

cwm.1

@@ -184,6 +184,14 @@ List all available items.
 .It Ic [Esc]
 Cancel.
 .El
+.Pp
+.Nm
+rereads its configuration file when it receives a hangup signal,
+.Dv SIGHUP ,
+by executing itself with the name and arguments with which it was started.
+This is equivilant to the
+.Ar restart
+function.
 .Sh SEARCH
 .Nm
 features the ability to search for windows by their current title,