app-emu: Add job test

For tty migration testing.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/app-emu/job/Makefile

+all: job
+
+%.o: %.c
+	gcc -c $< -o $@
+
+job: job.o
+	gcc -o $@ job.o
+
+clean:
+	rm -f *.o job

test/app-emu/job/job.c

+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+
+#include <fcntl.h>
+#include <string.h>
+#include <termios.h>
+
+#include <signal.h>
+
+#include <dirent.h>
+
+int main(int argc, char *argv[])
+{
+	int pid, gid, sid;
+	int tty_sid, tty_gid;
+	int fd = fileno(stdout);
+	char buf[32];
+	int c = 0;
+	struct dirent *de;
+	DIR *fd_dir;
+
+	if (!isatty(fd)) {
+		printf("stdout is not tty\n");
+		return -1;
+	}
+
+	pid = getpid();
+	gid = getgid();
+	sid = getsid(pid);
+
+	printf("pid %d gid %d sid %d\n",
+		pid, gid, sid);
+
+	snprintf(buf, sizeof(buf), "/proc/%d/fd", pid);
+	fd_dir = opendir(buf);
+	if (!fd_dir) {
+		printf("cant open %s\n", buf);
+		return -1;
+	}
+
+	while ((de = readdir(fd_dir))) {
+		int _fd;
+		if (!strcmp(de->d_name, "."))
+			continue;
+		if (!strcmp(de->d_name, ".."))
+			continue;
+
+		_fd = atoi(de->d_name);
+		if (_fd > 2 && _fd != fd && isatty(_fd)) {
+			close(_fd);
+			printf("Closed %d\n", _fd);
+		}
+	}
+	closedir(fd_dir);
+
+	if (ioctl(fd, TIOCGSID, &tty_sid) < 0) {
+		printf("cant obtain sid on stdout\n");
+		return -1;
+	}
+	printf("stdout sid = %d\n", tty_sid);
+
+	if (ioctl(fd, TIOCGPGRP, &tty_gid) < 0) {
+		printf("cant obtain gid on stdout\n");
+		return -1;
+	}
+	printf("stdout gid = %d\n", tty_gid);
+
+	printf("READY\n");
+
+	c = 0;
+	while (1) {
+		sleep(1);
+		if (c++ > 10) {
+			printf("Too long for restore\n");
+			exit(-1);
+		}
+
+		if (getsid(pid) != sid) {
+			printf("ALIVE\n");
+			break;
+		}
+	}
+
+	return 0;
+}

test/app-emu/job/job.exp

+#!/usr/bin/expect
+
+exec rm -rf ./dump
+exec mkdir ./dump
+
+system echo "-1" > ./dump/pid.pid
+
+set current [fork]
+switch $current {
+	-1 {
+		puts "Fork failed."
+		exit -1
+	}
+	0 {
+		set timeout 5
+		spawn ./job
+		set pid [exp_pid]
+		expect "READY" {
+			puts "READY"
+		} timeout {
+			puts "FAIL: Timed out on ready"
+			exit -1
+		}
+		system ../../../crtools dump -v 4 -D ./dump -o dump.log -j -t $pid
+		system echo "$pid" > ./dump/pid.pid
+		exit 0
+	}
+	default {
+		sleep 2
+		set timeout 5
+
+		set ::pidfile [open ./dump/pid.pid r]
+		set pid [gets $::pidfile]
+
+		if {$pid == -1} {
+			puts "FAIL: Invalid pid read"
+			exit -1
+		}
+
+		spawn ../../../crtools restore -v 4 -D ./dump -o restore.log -j -t $pid
+
+		expect "ALIVE" {
+			puts "PASS"
+		} timeout {
+			puts "FAIL: Timed out"
+			exit -1
+		}
+
+		exit 0
+	}
+}

test/app-emu/job/run.sh

+#!/bin/sh
+
+exec expect ./job.exp