[patch] Solution based on writing modified pidfile

way-1.pid (text/plain), 3.11 KB, created by Alexander Vershilov (RETIRED) on 2014-10-19 19:26:32 UTC

diff --git a/src/rc/start-stop-daemon.c b/src/rc/start-stop-daemon.c
index cc47c0b..cea2c86 100644
--- a/src/rc/start-stop-daemon.c
+++ b/src/rc/start-stop-daemon.c
@@ -673,6 +673,7 @@ start_stop_daemon(int argc, char **argv)
 	char *startas = NULL;
 	char *name = NULL;
 	char *pidfile = NULL;
+	char *spidfile; //chroot aware pidfile
 	char *retry = NULL;
 	int sig = -1;
 	int nicelevel = 0, ionicec = -1, ioniced = 0;
@@ -1001,10 +1002,23 @@ start_stop_daemon(int argc, char **argv)
 		exit(EXIT_FAILURE);
 	}
 
+	/* if we are chrooting our service then pidfile will be created
+	 * in the chroot folder, and it can't be controled in a natural way.
+	 * in order to workaround this problem we introducing a chroot aware
+	 * version of a pidfile variable.
+	 */
+	if (ch_root && pidfile) {
+	        spidfile = malloc(strlen(ch_root) + strlen(pidfile));
+		strcpy(spidfile, ch_root);
+		strcat(spidfile, pidfile);
+	} else {
+		spidfile = pidfile;
+	}
+
 	/* If we don't have a pidfile we should check if it's interpreted
 	 * or not. If it we, we need to pass the interpreter through
 	 * to our daemon calls to find it correctly. */
-	if (interpreted && !pidfile) {
+	if (interpreted && !spidfile) {
 		fp = fopen(exec_file, "r");
 		if (fp) {
 			p = fgets(line, sizeof(line), fp);
@@ -1048,7 +1062,7 @@ start_stop_daemon(int argc, char **argv)
 		else
 			parse_schedule(NULL, sig);
 		i = run_stop_schedule(exec, (const char *const *)margv,
-		    pidfile, uid, test, progress);
+		    spidfile, uid, test, progress);
 
 		if (i < 0)
 			/* We failed to stop something */
@@ -1060,17 +1074,17 @@ start_stop_daemon(int argc, char **argv)
 		 * remove information about it as it may have unexpectedly
 		 * crashed out. We should also return success as the end
 		 * result would be the same. */
-		if (pidfile && exists(pidfile))
-			unlink(pidfile);
+		if (spidfile && exists(spidfile))
+			unlink(spidfile);
 		if (svcname)
 			rc_service_daemon_set(svcname, exec,
 			    (const char *const *)argv,
-			    pidfile, false);
+			    spidfile, false);
 		exit(EXIT_SUCCESS);
 	}
 
-	if (pidfile)
-		pid = get_pid(pidfile);
+	if (spidfile)
+		pid = get_pid(spidfile);
 	else
 		pid = 0;
 
@@ -1107,8 +1121,8 @@ start_stop_daemon(int argc, char **argv)
 	eindentv();
 
 	/* Remove existing pidfile */
-	if (pidfile)
-		unlink(pidfile);
+	if (spidfile)
+		unlink(spidfile);
 
 	if (background)
 		signal_setup(SIGCHLD, handle_signal);
@@ -1341,13 +1355,13 @@ start_stop_daemon(int argc, char **argv)
 			if (kill(pid, 0) == 0)
 				alive = true;
 		} else {
-			if (pidfile) {
-				pid = get_pid(pidfile);
+			if (spidfile) {
+				pid = get_pid(spidfile);
 				if (pid == -1) {
 					eerrorx("%s: did not "
 					    "create a valid"
 					    " pid in `%s'",
-					    applet, pidfile);
+					    applet, spidfile);
 				}
 			} else
 				pid = 0;
@@ -1359,10 +1373,9 @@ start_stop_daemon(int argc, char **argv)
 		if (!alive)
 			eerrorx("%s: %s died", applet, exec);
 	}
-
 	if (svcname)
 		rc_service_daemon_set(svcname, exec,
-		    (const char *const *)margv, pidfile, true);
+		    (const char *const *)margv, spidfile, true);
 
 	exit(EXIT_SUCCESS);
 	/* NOTREACHED */