| /* Copyright (C) 1991-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <errno.h> |
| #include <time.h> |
| #include <sys/time.h> |
| |
| /* Get the current time of day and timezone information, |
| putting it into *TV and *TZ. If TZ is NULL, *TZ is not filled. |
| Returns 0 on success, -1 on errors. */ |
| int |
| __gettimeofday (struct timeval *tv, struct timezone *tz) |
| { |
| if (tv == NULL) |
| { |
| __set_errno (EINVAL); |
| return -1; |
| } |
| |
| tv->tv_sec = (long int) time ((time_t *) NULL); |
| tv->tv_usec = 0L; |
| |
| if (tz != NULL) |
| { |
| const time_t timer = tv->tv_sec; |
| struct tm tm; |
| const struct tm *tmp; |
| |
| const long int save_timezone = __timezone; |
| const long int save_daylight = __daylight; |
| char *save_tzname[2]; |
| save_tzname[0] = __tzname[0]; |
| save_tzname[1] = __tzname[1]; |
| |
| tmp = localtime_r (&timer, &tm); |
| |
| tz->tz_minuteswest = __timezone / 60; |
| tz->tz_dsttime = __daylight; |
| |
| __timezone = save_timezone; |
| __daylight = save_daylight; |
| __tzname[0] = save_tzname[0]; |
| __tzname[1] = save_tzname[1]; |
| |
| if (tmp == NULL) |
| return -1; |
| } |
| |
| return 0; |
| } |
| libc_hidden_def (__gettimeofday) |
| weak_alias (__gettimeofday, gettimeofday) |
| libc_hidden_weak (gettimeofday) |