mirror of
https://github.com/clearlinux/swupd-client.git
synced 2026-09-08 06:31:50 +00:00
Otavio Pontes
19c4dbb6d6
As there are more string functions that will be needed by log and verifytime and it would be impractical to copy everything, prefering to include more dependencies instead. Signed-off-by: Otavio Pontes <otavio.pontes@intel.com>
125 lines
3.0 KiB
C
125 lines
3.0 KiB
C
/*
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* Software Updater - client side
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*
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* Copyright © 2017 Intel Corporation.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2 or later of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* Authors:
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* Tudor Marcu <tudor.marcu@intel.com>
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*
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*/
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#define _GNU_SOURCE
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#include "verifytime.h"
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#include "lib/log.h"
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#include "lib/sys.h"
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#include <errno.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <time.h>
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#define DAY_SECONDS 86400
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static unsigned long int get_versionstamp(char *path_prefix)
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{
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FILE *fp = NULL;
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char data[11];
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char *filename;
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unsigned long int version_num;
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filename = sys_path_join("%s/usr/share/clear/versionstamp", path_prefix ? path_prefix : "");
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errno = 0;
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fp = fopen(filename, "r");
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if (fp == NULL) {
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if (errno == ENOENT) {
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warn("%s does not exist!\n", filename);
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} else {
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error("Failed to open %s\n", filename);
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}
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version_num = 0;
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goto exit;
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}
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if (fgets(data, 11, fp) == NULL) {
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error("Failed to read %s\n", filename);
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version_num = 0;
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goto close_and_exit;
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}
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/* If we read a 0 the versionstamp is wrong/corrupt */
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errno = 0;
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version_num = strtoul(data, NULL, 10);
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if (errno != 0) {
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version_num = 0;
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}
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close_and_exit:
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fclose(fp);
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exit:
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free(filename);
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return version_num;
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}
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static bool set_time(time_t mtime)
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{
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struct timespec clock_time = {
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.tv_sec = mtime,
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.tv_nsec = 0,
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};
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if (clock_settime(CLOCK_REALTIME, &clock_time) < 0) {
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error("Failed to set system time\n");
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return false;
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}
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info("Set system time to %s\n", ctime(&mtime));
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return true;
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}
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bool verify_time(char *path_prefix)
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{
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time_t currtime;
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struct tm *timeinfo;
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unsigned long int versionstamp;
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time(&currtime);
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timeinfo = localtime(&currtime);
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versionstamp = get_versionstamp(path_prefix);
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if (versionstamp == 0) {
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return false;
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}
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time_t versiontime = (time_t)versionstamp;
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/* Give it a day's worth of tolerance */
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if ((unsigned long int)currtime < (versionstamp - DAY_SECONDS)) {
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/* TODO: Get even better time than the versionstamp using a collection of servers,
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* and fallback to using versionstamp time if it does not work or seem reasonable.
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* The system time wasn't sane, so set it here and try again */
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char time_str[50];
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strftime(time_str, sizeof(time_str), "%a %b %d %H:%M:%S %Y", timeinfo);
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warn("Current time is %s\nAttempting to fix...", time_str);
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if (set_time(versiontime) == false) {
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return false;
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}
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}
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return true;
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}
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