micro-utils/libmu/parse_mount.c

#include <string.h>
#include "parse_mount.h"

unsigned long mu_parse_opts(char *str, char *data, const size_t data_size) {
	memset(data, '\0', data_size);
	unsigned long opt = 0;
	size_t data_len = 0;

	char *token = strtok(str, ",");
	while (token != NULL) {
		int invalidopt = 1;
		for (size_t i = 0; i < sizeof(mu_options) / sizeof(mu_options[0]); i++) {
			if (mu_options[i].opt && !strcmp(token, mu_options[i].opt)) {
				opt |= mu_options[i].val;
				invalidopt = 0;
				break;
			}

			if (mu_options[i].notopt && !strcmp(token, mu_options[i].notopt)) {
				opt &= ~mu_options[i].val;
				invalidopt = 0;
				break;
			}
		}

		/* Unknow opt, pass in mount() */
		size_t len = strlen(token);
		if (invalidopt && len > 0) {
			/* Copy token string */
			for (size_t i = 0; i < len; i++) {
				if (data_len + 1 >= data_size)
					break;

				else {
					data[data_len] = token[i];
					data_len++;
				}
			}

			if (data_len && data_len + 1 < data_size)
				data[data_len++] = ',';
		}

		token = strtok(NULL, ",");
	}

	if (data_len > 0)
		data[data_len - 1] = '\0';

	return opt;
}