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5535e81a79
It has no external users, and this package still has too many different responsibilities, some of which may be available elsewhere, so moving it internal so that we can decide to dismantle it further. Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
49 lines
1.3 KiB
Go
49 lines
1.3 KiB
Go
package system
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import (
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"os"
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"syscall"
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"time"
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"unsafe"
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)
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// Used by Chtimes
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var unixEpochTime, unixMaxTime time.Time
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func init() {
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unixEpochTime = time.Unix(0, 0)
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if unsafe.Sizeof(syscall.Timespec{}.Nsec) == 8 {
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// This is a 64 bit timespec
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// os.Chtimes limits time to the following
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//
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// Note that this intentionally sets nsec (not sec), which sets both sec
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// and nsec internally in time.Unix();
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// https://github.com/golang/go/blob/go1.19.2/src/time/time.go#L1364-L1380
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unixMaxTime = time.Unix(0, 1<<63-1)
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} else {
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// This is a 32 bit timespec
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unixMaxTime = time.Unix(1<<31-1, 0)
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}
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}
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// Chtimes changes the access time and modified time of a file at the given path.
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// If the modified time is prior to the Unix Epoch (unixMinTime), or after the
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// end of Unix Time (unixEpochTime), os.Chtimes has undefined behavior. In this
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// case, Chtimes defaults to Unix Epoch, just in case.
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func Chtimes(name string, atime time.Time, mtime time.Time) error {
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if atime.Before(unixEpochTime) || atime.After(unixMaxTime) {
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atime = unixEpochTime
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}
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if mtime.Before(unixEpochTime) || mtime.After(unixMaxTime) {
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mtime = unixEpochTime
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}
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if err := os.Chtimes(name, atime, mtime); err != nil {
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return err
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}
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// Take platform specific action for setting create time.
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return setCTime(name, mtime)
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}
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