138 lines
4.0 KiB
C
138 lines
4.0 KiB
C
#include <sys/types.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "test_fs.h"
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// ============================================================================
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// Helper variable and function
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// ============================================================================
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const char **g_argv;
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static int test_readlink_from_procfs(const char *proc_inode, char *buf, int buf_size,
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const char *expected_target) {
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int n = readlink(proc_inode, buf, buf_size);
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if (n < 0) {
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THROW_ERROR("failed to readlink from %s", proc_inode);
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} else if (n != strlen(expected_target)) {
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THROW_ERROR("readlink from %s length is wrong", proc_inode);
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}
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if (strncmp(buf, expected_target, n) != 0) {
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THROW_ERROR("check the result from %s failed", proc_inode);
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}
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return 0;
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}
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// ============================================================================
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// Test cases for procfs
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// ============================================================================
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static int test_readlink_from_proc_self_exe() {
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char exe_buf[PATH_MAX] = { 0 };
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char absolute_path[PATH_MAX] = { 0 };
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const char *proc_exe = "/proc/self/exe";
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int n = snprintf(absolute_path, sizeof(absolute_path), "/bin/%s", *g_argv);
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if (n < 0) {
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THROW_ERROR("failed to call snprintf");
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}
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if (test_readlink_from_procfs(proc_exe, exe_buf, PATH_MAX, absolute_path) < 0) {
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THROW_ERROR("failed to call test_readlink_from_procfs");
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}
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return 0;
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}
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static int test_readlink_from_proc_self_cwd() {
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char cwd_buf[PATH_MAX] = { 0 };
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const char *proc_cwd = "/proc/self/cwd";
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if (test_readlink_from_procfs(proc_cwd, cwd_buf, PATH_MAX, "/") < 0) {
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THROW_ERROR("failed to call test_readlink_from_procfs");
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}
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if (chdir("/bin") < 0) {
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THROW_ERROR("failed to chdir");
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}
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if (test_readlink_from_procfs(proc_cwd, cwd_buf, PATH_MAX, "/bin") < 0) {
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THROW_ERROR("failed to call test_readlink_from_procfs after chdir");
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}
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if (chdir("/") < 0) {
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THROW_ERROR("failed to chdir");
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}
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return 0;
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}
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static int test_read_from_proc_self_cmdline() {
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char absolute_path[PATH_MAX] = { 0 };
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const char *proc_cmdline = "/proc/self/cmdline";
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int n = snprintf(absolute_path, sizeof(absolute_path), "/bin/%s", *g_argv);
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if (n < 0) {
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THROW_ERROR("failed to call snprintf");
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}
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if (fs_check_file_content(proc_cmdline, absolute_path) < 0) {
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THROW_ERROR("failed to check result in %s", proc_cmdline);
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}
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return 0;
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}
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static int test_read_from_proc_meminfo() {
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char meminfo[1024] = { 0 };
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const char *proc_meminfo = "/proc/meminfo";
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int fd = open(proc_meminfo, O_RDONLY);
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if (fd < 0) {
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THROW_ERROR("failed to open file: %s", proc_meminfo);
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}
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if (read(fd, meminfo, sizeof(meminfo)) < 0) {
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THROW_ERROR("failed to read the meminfo");
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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 test_read_from_proc_cpuinfo() {
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char cpuinfo[1024] = { 0 };
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const char *proc_cpuinfo = "/proc/cpuinfo";
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int len;
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int fd = open(proc_cpuinfo, O_RDONLY);
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if (fd < 0) {
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THROW_ERROR("failed to open file: %s", proc_cpuinfo);
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}
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do {
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len = read(fd, cpuinfo, sizeof(cpuinfo));
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if (len < 0) {
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THROW_ERROR("failed to read the cpuinfo");
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} else if (len < sizeof(cpuinfo)) {
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break;
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}
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} while (len == sizeof(cpuinfo));
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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 suite main
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// ============================================================================
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static test_case_t test_cases[] = {
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TEST_CASE(test_readlink_from_proc_self_exe),
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TEST_CASE(test_readlink_from_proc_self_cwd),
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TEST_CASE(test_read_from_proc_self_cmdline),
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TEST_CASE(test_read_from_proc_meminfo),
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TEST_CASE(test_read_from_proc_cpuinfo),
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};
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int main(int argc, const char *argv[]) {
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g_argv = argv;
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return test_suite_run(test_cases, ARRAY_SIZE(test_cases));
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}
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