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#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <limits.h>
#include <fcntl.h>
#include <unistd.h>
#include <sched.h>
#include <sys/wait.h>
#include <sys/syscall.h>
#include <check.h>
#include "../../gluten.h"
#include "../../operations.h"
struct args_write_file {
char *file;
char *t;
ssize_t size;
};
static void write_file(char *file, char *t, ssize_t size)
{
int fd;
fd = open(file, O_CREAT | O_RDWR, S_IWUSR | S_IRUSR);
ck_assert_int_ge(fd, -1);
write(fd, t, size);
close(fd);
}
static int write_file_get_fd(char *file, char *t, ssize_t size)
{
int fd;
write_file(file, t, size);
fd = open(file, O_RDONLY, S_IWUSR);
unlink(file);
return fd;
}
static int write_file_clone(void *a)
{
struct args_write_file *args = (struct args_write_file *)a;
write_file(args->file, args->t, args->size);
pause();
return 0;
}
static pid_t create_func_ns(int (*fn)(void *), void *arg, struct ns_spec ns[])
{
char stack[STACK_SIZE];
pid_t child;
int flags = SIGCHLD;
unsigned int i;
for (i = 0; i < sizeof(sizeof(enum ns_type)); i++) {
if (ns[i].type == NS_NONE)
continue;
switch (i) {
case NS_CGROUP:
flags |= CLONE_NEWCGROUP;
break;
case NS_IPC:
flags |= CLONE_NEWIPC;
break;
case NS_NET:
flags |= CLONE_NEWNET;
break;
case NS_MOUNT:
flags |= CLONE_NEWNS;
break;
case NS_PID:
flags |= CLONE_NEWPID;
break;
case NS_USER:
flags |= CLONE_NEWUSER;
break;
case NS_UTS:
flags |= CLONE_NEWUTS;
break;
case NS_TIME:
fprintf(stderr,
"option NS_TIME not suppoted by clone\n");
break;
default:
fprintf(stderr, "unrecognized option %d\n", i);
}
}
child = clone(fn, stack + sizeof(stack), flags, arg);
if (child == -1) {
perror("clone");
exit(EXIT_FAILURE);
}
return child;
}
START_TEST(test_with_open_read_ns)
{
char test_file[] = "/tmp/test.txt";
char t[PATH_MAX] = "Hello Test";
struct args_write_file args = { test_file, t, sizeof(t) };
struct op_call call;
int flags = O_RDWR;
struct arg_clone c;
char buf[PATH_MAX];
unsigned i;
long count;
pid_t pid;
int ret;
c.args = &call;
count = sizeof(buf);
for (i = 0; i < sizeof(enum ns_type); i++)
call.context.ns[i].type = NS_NONE;
call.context.ns[NS_MOUNT].type = NS_SPEC_PID;
pid = create_func_ns(write_file_clone, (void *)&args, call.context.ns);
call.context.ns[NS_MOUNT].pid = pid;
call.nr = SYS_open;
call.args[0] = (void *)&test_file;
call.args[1] = (void *)(long)flags;
ret = do_call(&c);
ck_assert_int_eq(ret, 0);
ck_assert_msg(c.ret >= 0, "expect ret %ld should be nonegative", c.ret);
call.nr = SYS_read;
call.args[0] = (void *)(long)c.ret;
call.args[1] = (void *)&buf;
call.args[2] = (void *)count;
ret = do_call(&c);
kill(pid, SIGCONT);
ck_assert_int_eq(ret, 0);
ck_assert_msg(c.ret == count, "expect ret %ld to be %ld", c.ret, count);
ck_assert_str_eq(t, buf);
}
END_TEST
START_TEST(test_with_read)
{
char test_file[] = "/tmp/test.txt";
char t[PATH_MAX] = "Hello Test";
struct op_call call;
struct arg_clone c;
char buf[PATH_MAX];
unsigned i;
long count;
int fd, ret;
c.args = &call;
fd = write_file_get_fd(test_file, t, sizeof(t));
count = sizeof(buf);
for (i = 0; i < sizeof(enum ns_type); i++)
call.context.ns[i].type = NS_NONE;
call.nr = SYS_read;
call.args[0] = (void *)(long)fd;
call.args[1] = (void *)&buf;
call.args[2] = (void *)count;
ret = do_call(&c);
ck_assert_int_eq(ret, 0);
ck_assert_msg(c.ret == count, "expect ret %ld to be %ld", c.ret, count);
ck_assert_str_eq(t, buf);
}
END_TEST
START_TEST(test_with_getppid)
{
struct op_call call;
struct arg_clone c;
unsigned i;
long pid = (long)getpid();
int ret;
for (i = 0; i < sizeof(enum ns_type); i++)
call.context.ns[i].type = NS_NONE;
call.nr = SYS_getppid;
c.args = &call;
ret = do_call(&c);
ck_assert_int_eq(ret, 0);
ck_assert_msg(c.ret == pid, "expect ret %ld to be equal to %ld", c.ret,
pid);
}
END_TEST
Suite *op_call_suite(void)
{
Suite *s;
TCase *tops;
s = suite_create("Perform ops call");
tops = tcase_create("op calls");
tcase_add_test(tops, test_with_getppid);
tcase_add_test(tops, test_with_read);
tcase_add_test(tops, test_with_open_read_ns);
suite_add_tcase(s, tops);
return s;
}
int main(void)
{
int no_failed = 0;
Suite *s;
SRunner *runner;
s = op_call_suite();
runner = srunner_create(s);
srunner_run_all(runner, CK_VERBOSE);
no_failed = srunner_ntests_failed(runner);
srunner_free(runner);
return (no_failed == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
}
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