/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ This program is free software; you can redistribute it and/or modify         │
│ it under the terms of the GNU General Public License as published by         │
│ the Free Software Foundation; version 2 of the License.                      │
│                                                                              │
│ This program 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             │
│ General Public License for more details.                                     │
│                                                                              │
│ You should have received a copy of the GNU General Public License            │
│ along with this program; if not, write to the Free Software                  │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA                │
│ 02110-1301 USA                                                               │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/struct/timeval.h"
#include "libc/time/time.h"

/**
 * Returns time as seconds from UNIX epoch.
 *
 * @param opt_out_ret can receive return value on success
 * @return seconds since epoch, or -1 w/ errno
 * @asyncsignalsafe
 */
int64_t time(int64_t *opt_out_ret) {
  int64_t rc;
  struct timeval tv;
  if (gettimeofday(&tv, NULL) == -1) {
    rc = -1;
  } else {
    rc = tv.tv_sec;
  }
  if (opt_out_ret) {
    *opt_out_ret = rc;
  }
  return rc;
}