github.com/ubuntu-core/snappy@v0.0.0-20210827154228-9e584df982bb/osutil/settime.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2021 Canonical Ltd
     5   *
     6   * This program is free software: you can redistribute it and/or modify
     7   * it under the terms of the GNU General Public License version 3 as
     8   * published by the Free Software Foundation.
     9   *
    10   * This program is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU General Public License
    16   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17   *
    18   */
    19  
    20  package osutil
    21  
    22  import (
    23  	"syscall"
    24  	"time"
    25  )
    26  
    27  // exposed for different 32-bit vs 64-bit definitions of syscall.Timeval
    28  var timeToTimeval func(time.Time) *syscall.Timeval
    29  
    30  // exposed for mocking, since we can't actually call this without being root
    31  // on system running tests
    32  var syscallSettimeofday = syscall.Settimeofday
    33  
    34  // SetTime sets the time of the system using settimeofday(). This syscall needs
    35  // to be performed as root or with CAP_SYS_TIME.
    36  func SetTime(t time.Time) error {
    37  	tv := timeToTimeval(t)
    38  
    39  	return syscallSettimeofday(tv)
    40  }