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unix: add support for clock_adjtime on Linux

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This provides a ClockAdjtime function providing access to the clock_adjtime system call on Linux.
The clock_adjtime system call is like adjtimex, but takes a clockid_t as its first argument.
The unix package already provides Adjtimex and the associated Timex struct; it also provides
the other functions that take a clockid_t (like ClockGettime). ClockAdjtime is an essential
system call for programs that want to use the Linux PTP hardware clock infrastructure (see
https://docs.kernel.org/driver-api/ptp.html).

Fixes golang/go#57618

Change-Id: I68d022425eb9cd394a204ad7fedab985c0496fee
Reviewed-on: https://go-review.googlesource.com/c/sys/+/463056
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
This commit is contained in:
James Clark
2023-01-25 17:50:15 +07:00
committed by Gopher Robot
parent 13fe000ef0
commit c3037ed066
2 changed files with 12 additions and 0 deletions
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1
unix/syscall_linux.go
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@@ -1800,6 +1800,7 @@ func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err e
//sysnb Capset(hdr *CapUserHeader, data *CapUserData) (err error)
//sys Chdir(path string) (err error)
//sys Chroot(path string) (err error)
//sys ClockAdjtime(clockid int32, buf *Timex) (state int, err error)
//sys ClockGetres(clockid int32, res *Timespec) (err error)
//sys ClockGettime(clockid int32, time *Timespec) (err error)
//sys ClockNanosleep(clockid int32, flags int, request *Timespec, remain *Timespec) (err error)

11
unix/zsyscall_linux.go
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@@ -537,6 +537,17 @@ func Chroot(path string) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func ClockAdjtime(clockid int32, buf *Timex) (state int, err error) {
r0, _, e1 := Syscall(SYS_CLOCK_ADJTIME, uintptr(clockid), uintptr(unsafe.Pointer(buf)), 0)
state = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func ClockGetres(clockid int32, res *Timespec) (err error) {
_, _, e1 := Syscall(SYS_CLOCK_GETRES, uintptr(clockid), uintptr(unsafe.Pointer(res)), 0)
if e1 != 0 {