Function process_hugefiles

dpdk/app/test/test_eal_flags.c:165–281

* Cycles through hugepage directories and looks for hugepage * files associated with a given prefix. Depending on value of * action, the hugepages are checked if they exist, checked if * they can be locked, or are simply deleted. * * Returns 1 if it finds at least one hugepage matching the action * Returns 0 if no matching hugepages were found * Returns -1 if it encounters an error */

 * Returns -1 if it encounters an error
 */
static int
process_hugefiles(const char * prefix, enum hugepage_action action)
{
	FILE * hugedir_handle = NULL;
	DIR * hugepage_dir = NULL;
	struct dirent *dirent = NULL;

	char hugefile_prefix[PATH_MAX] = {0};
	char hugedir[PATH_MAX] = {0};
	char line[PATH_MAX] = {0};

	int fd, lck_result, result = 0;

	const int prefix_len = snprintf(hugefile_prefix,
			sizeof(hugefile_prefix), "%smap_", prefix);
	if (prefix_len <= 0 || prefix_len >= (int)sizeof(hugefile_prefix)
			|| prefix_len >= (int)sizeof(dirent->d_name)) {
		printf("Error creating hugefile filename prefix\n");
		return -1;
	}

	/* get hugetlbfs mountpoints from /proc/mounts */
	hugedir_handle = fopen("/proc/mounts", "r");

	if (hugedir_handle == NULL) {
		printf("Error parsing /proc/mounts!\n");
		return -1;
	}

	/* read and parse script output */
	while (fgets(line, sizeof(line), hugedir_handle) != NULL) {

		/* check if we have a hugepage filesystem path */
		if (!get_hugepage_path(line, sizeof(line), hugedir, sizeof(hugedir)))
			continue;

		/* check if directory exists */
		if ((hugepage_dir = opendir(hugedir)) == NULL) {
			fclose(hugedir_handle);
			printf("Error reading %s: %s\n", hugedir, strerror(errno));
			return -1;
		}

		while ((dirent = readdir(hugepage_dir)) != NULL) {
			if (memcmp(dirent->d_name, hugefile_prefix, prefix_len) != 0)
				continue;

			switch (action) {
			case HUGEPAGE_CHECK_EXISTS:
				{
					/* file exists, return */
					closedir(hugepage_dir);
					result = 1;
					goto end;
				}
				break;
			case HUGEPAGE_DELETE:
				{