C++ (Cpp) sc_execve Examples

Example #1

static int dumpfn(void *arg)
{
	int i;
	struct args_t *args = arg;
	int *pfd = args->pfd;
	char *argv[] = { "iptables-save", "-c", NULL };

	i = real_env_create(args->veid, VE_ENTER|VE_SKIPLOCK, 2, NULL, 0);
	if (i < 0) {
		eprintk("cannot enter ve to dump iptables\n");
		module_put(THIS_MODULE);
		return 255 << 8;
	}

	if (pfd[1] != 1)
		sc_dup2(pfd[1], 1);

	for (i=0; i<current->files->fdt->max_fds; i++) {
		if (i != 1)
			sc_close(i);
	}

	module_put(THIS_MODULE);

	set_fs(KERNEL_DS);
	i = sc_execve("/sbin/iptables-save", argv, NULL);
	if (i == -ENOENT)
		i = sc_execve("/usr/sbin/iptables-save", argv, NULL);
	eprintk("failed to exec iptables-save: %d\n", i);
	return 255 << 8;
}

Example #2

static int dumpfn(void *arg)
{
	int i;
	int *pfd = arg;
	char *argv[] = { "iptables-restore", "-c", NULL };

	if (pfd[0] != 0)
		sc_dup2(pfd[0], 0);

	for (i=1; i<current->files->fdt->max_fds; i++)
		sc_close(i);

	module_put(THIS_MODULE);

	set_fs(KERNEL_DS);
	i = sc_execve("/sbin/iptables-restore", argv, NULL);
	if (i == -ENOENT)
		i = sc_execve("/usr/sbin/iptables-restore", argv, NULL);
	eprintk("failed to exec iptables-restore: %d\n", i);
	return 255 << 8;
}