int main(void)
{
int pid, status = 0, ret;
long int flags = 0;
setup();
flags |= CLONE_NEWNS;
flags |= CLONE_NEWNET;
if (tst_kvercmp(2, 6, 19) < 0)
tst_brkm(TCONF, NULL, "CLONE_NEWPID not supported");
if ((pid = fork()) == 0) {
// Child.
#if HAVE_UNSHARE
ret = unshare(flags);
if (ret < 0) {
perror("unshare");
tst_brkm(TFAIL,
NULL,
"Error:Unshare syscall failed for network namespace");
}
#else
tst_resm(TCONF, "System doesn't have unshare support");
#endif
if (crtchild(CHILD_SCRIPT, NULL) != 0) {
tst_brkm(TFAIL, NULL, "Failed running child script");
}
} else {
//parent
ret = system(PARENT_SCRIPT);
status = WEXITSTATUS(ret);
if (ret == -1 || status != 0) {
tst_resm(TFAIL,
"Error: While running the IPv6 tests between \
parent & child NS");
fflush(stdout);
tst_exit();
}
fflush(stdout);
ret = waitpid(pid, &status, __WALL);
status = WEXITSTATUS(status);
if (status != 0 || ret == -1) {
tst_brkm(TFAIL, NULL,
"waitpid() returns %d, errno %d", ret,
errno);
}
tst_resm(TPASS, "par child ipv6");
tst_exit();
}
/* The function to be executed in the child namespace */
int child_fn(void *c1)
{
char *ltproot, *child;
unsigned long flags = 0;
#if HAVE_UNSHARE
int ret;
#endif
/* Flags to unshare different Namespaces */
flags |= CLONE_NEWNS;
flags |= CLONE_NEWNET;
flags |= CLONE_NEWUTS;
flags |= CLONE_FS;
ltproot = getenv("LTPROOT");
if (!ltproot) {
printf("LTPROOT env variable is not set\n");
printf("Please set LTPROOT and re-run the test..\n");
return -1;
}
child = malloc(FILENAME_MAX);
if (child == NULL) {
printf("FAIL: error while allocating memory");
exit(1);
}
sprintf(child, "%s/testcases/bin/childns.sh", ltproot);
/* Unshare the network namespace in the child */
#if HAVE_UNSHARE
ret = unshare(flags);
if (ret < 0) {
perror("Failed to unshare for netns...");
return 1;
}
return crtchild(child, c1);
#else
printf("System doesn't support unshare.\n");
return -1;
#endif
}