135 lines
3.3 KiB
C
135 lines
3.3 KiB
C
#include <sys/stat.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <poll.h>
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#include <unistd.h>
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#include <stdio.h>
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#include "test.h"
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// ============================================================================
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// Test utilities
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// ============================================================================
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static int check_file_readable(const char *filename) {
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int fd;
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char buf[512] = {0};
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int len;
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if ((fd = open(filename, O_RDONLY)) < 0) {
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THROW_ERROR("failed to open the file");
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}
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if ((len = read(fd, buf, sizeof(buf))) != sizeof(buf)) {
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THROW_ERROR("failed to read the file");
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}
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close(fd);
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return 0;
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}
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static int check_file_writable(const char *filename) {
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int fd;
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char buf[512] = {0};
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int len;
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if ((fd = open(filename, O_WRONLY)) < 0) {
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THROW_ERROR("failed to open the file");
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}
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if ((len = write(fd, buf, sizeof(buf))) != sizeof(buf)) {
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THROW_ERROR("failed to read the file");
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}
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close(fd);
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return 0;
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}
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// ============================================================================
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// Test cases for /dev/random, /dev/urandom, /dev/
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// ============================================================================
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int test_dev_null() {
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if (check_file_writable("/dev/null")) {
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THROW_ERROR("failed to write to /dev/null");
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}
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return 0;
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}
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int test_dev_zero() {
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if (check_file_readable("/dev/zero")) {
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THROW_ERROR("failed to read from /dev/null");
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}
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return 0;
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}
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int test_dev_random() {
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if (check_file_readable("/dev/random")) {
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THROW_ERROR("failed to read from /dev/random");
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}
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return 0;
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}
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int test_dev_urandom() {
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if (check_file_readable("/dev/urandom")) {
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THROW_ERROR("failed to read from /dev/urandom");
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}
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return 0;
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}
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int test_dev_urandom_fstat() {
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int fd;
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struct stat stat_buf;
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if ((fd = open("/dev/urandom", O_RDONLY)) < 0) {
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THROW_ERROR("failed to open the file");
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}
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if (fstat(fd, &stat_buf) < 0) {
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close(fd);
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THROW_ERROR("failed to fstat the file");
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}
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close(fd);
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if ((stat_buf.st_mode & S_IFMT) != S_IFCHR) {
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THROW_ERROR("not a character device");
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}
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return 0;
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}
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int test_dev_urandom_poll() {
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int fd;
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struct pollfd fds;
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if ((fd = open("/dev/urandom", O_RDONLY)) < 0) {
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THROW_ERROR("failed to open the file");
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}
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fds.fd = fd;
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fds.events = POLLIN;
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if (poll(&fds, 1, 5) <= 0) {
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close(fd);
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THROW_ERROR("failed to poll or file is not ready");
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}
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close(fd);
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if (fds.revents != POLLIN) {
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THROW_ERROR("not expected returned events");
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}
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return 0;
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}
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int test_dev_arandom() {
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if (check_file_readable("/dev/arandom")) {
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THROW_ERROR("failed to read from /dev/arandom");
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}
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return 0;
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}
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// ============================================================================
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// Test suite
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// ============================================================================
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static test_case_t test_cases[] = {
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TEST_CASE(test_dev_null),
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TEST_CASE(test_dev_zero),
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TEST_CASE(test_dev_random),
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TEST_CASE(test_dev_urandom),
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TEST_CASE(test_dev_urandom_fstat),
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TEST_CASE(test_dev_urandom_poll),
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TEST_CASE(test_dev_arandom),
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};
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int main() {
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return test_suite_run(test_cases, ARRAY_SIZE(test_cases));
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}
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