test: Add test for notifications via libcriu

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/libcriu/Makefile

-all: test_sub test_self
+all: test_sub test_self test_notify
 .PHONY: all
 
 run: all
@@ -16,9 +16,15 @@ test_self: test_self.o lib.o
 test_self.o: test_self.c
 	gcc -c $^ -I ../../lib -o $@
 
+test_notify: test_notify.o lib.o
+	gcc $^ -L ../../lib -lcriu -o $@
+
+test_notify.o: test_notify.c
+	gcc -c $^ -I ../../lib -o $@
+
 lib.o: lib.c
 	gcc -c $^ -I ../../lib -o $@
 
 clean:
-	rm -rf test_sub test_sub.o test_self test_sub.o
+	rm -rf test_sub test_sub.o test_self test_sub.o test_notify test_notify.o
 .PHONY: clean

test/libcriu/run.sh

@@ -37,6 +37,7 @@ function run_test {
 
 run_test test_sub
 run_test test_self
+run_test test_notify
 
 echo "== Stopping service"
 kill -TERM $(cat wdir/s/pidfile)

test/libcriu/test_notify.c

+#include "criu.h"
+#include <fcntl.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <signal.h>
+#include "lib.h"
+
+#define SUCC_ECODE	42
+
+static int actions_called = 0;
+static int notify(char *action)
+{
+	printf("ACTION: %s\n", action);
+	actions_called++;
+	return 0;
+}
+
+int main(int argc, char **argv)
+{
+	int pid, ret, fd, p[2];
+
+	printf("--- Start loop ---\n");
+	pipe(p);
+	pid = fork();
+	if (pid < 0) {
+		perror("Can't");
+		return -1;
+	}
+
+	if (!pid) {
+		printf("   `- loop: initializing\n");
+		if (setsid() < 0)
+			exit(1);
+
+		close(0);
+		close(1);
+		close(2);
+		close(p[0]);
+
+		ret = SUCC_ECODE;
+		write(p[1], &ret, sizeof(ret));
+		close(p[1]);
+
+		while (1)
+			sleep(1);
+
+		exit(SUCC_ECODE);
+	}
+
+	close(p[1]);
+
+	/* Wait for kid to start */
+	ret = -1;
+	read(p[0], &ret, sizeof(ret));
+	if (ret != SUCC_ECODE) {
+		printf("Error starting loop\n");
+		goto err;
+	}
+
+	/* Wait for pipe to get closed, then dump */
+	read(p[0], &ret, 1);
+	close(p[0]);
+
+	printf("--- Dump loop ---\n");
+	criu_init_opts();
+	criu_set_service_address(argv[1]);
+	criu_set_pid(pid);
+	criu_set_log_file("dump.log");
+	criu_set_log_level(4);
+	criu_set_notify_cb(notify);
+	fd = open(argv[2], O_DIRECTORY);
+	criu_set_images_dir_fd(fd);
+
+	ret = criu_dump();
+	if (ret < 0) {
+		what_err_ret_mean(ret);
+		kill(pid, SIGKILL);
+		goto err;
+	}
+
+	printf("   `- Dump succeeded\n");
+	ret = 0;
+err:
+	waitpid(pid, NULL, 0);
+	if (ret || !actions_called) {
+		printf("FAIL (%d/%d)\n", ret, actions_called);
+		return 1;
+	}
+
+	printf("   `- Success (%d actions)\n", actions_called);
+	return 0;
+}