termux-packages/packages/unar/sys_time.c

63 lines
2.3 KiB
C
Raw Normal View History

2022-01-02 10:32:22 +01:00
/*
* Copyright (C) 2013 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/time.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#pragma GCC visibility push(hidden)
int timespec_from_timeval(struct timespec* ts, const struct timeval tv) {
2022-01-02 10:32:22 +01:00
// Whole seconds can just be copied.
ts->tv_sec = tv.tv_sec;
2022-01-02 10:32:22 +01:00
// But we might overflow when converting microseconds to nanoseconds.
if (tv.tv_usec >= 1000000 || tv.tv_usec < 0) {
return 0;
}
ts->tv_nsec = tv.tv_usec * 1000;
2022-01-02 10:32:22 +01:00
return 1;
}
static int futimesat(int fd, const char* path, const struct timeval tv[2], int flags) {
struct timespec ts[2];
if (tv && (!timespec_from_timeval(&ts[0], tv[0]) || !timespec_from_timeval(&ts[1], tv[1]))) {
2022-01-02 10:32:22 +01:00
errno = EINVAL;
return -1;
}
return utimensat(fd, path, tv ? ts : NULL, flags);
}
int lutimes(const char* path, const struct timeval tv[2]) {
return futimesat(AT_FDCWD, path, tv, AT_SYMLINK_NOFOLLOW);
}
#pragma GCC visibility pop