unix: add ClockNanosleep and TIMER_ABSTIME

This adds the ClockNanosleep syscall and the TIMER_* constants;
currently only TIMER_ABSTIME for specifying an absolute timestamp.

Change-Id: Ic8d857eb92818529aadab569cd8646a19bb9c055
Reviewed-on: https://go-review.googlesource.com/c/157658
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>

unix/mkerrors.sh

@@ -474,7 +474,7 @@ ccflags="$@"
 		$2 ~ /^CLONE_[A-Z_]+/ ||
 		$2 !~ /^(BPF_TIMEVAL)$/ &&
 		$2 ~ /^(BPF|DLT)_/ ||
-		$2 ~ /^CLOCK_/ ||
+		$2 ~ /^(CLOCK|TIMER)_/ ||
 		$2 ~ /^CAN_/ ||
 		$2 ~ /^CAP_/ ||
 		$2 ~ /^ALG_/ ||

unix/syscall_linux.go

@@ -1381,6 +1381,7 @@ func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err e
 //sys	Chroot(path string) (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)
 //sys	Close(fd int) (err error)
 //sys	CopyFileRange(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
 //sys	DeleteModule(name string, flags int) (err error)

unix/syscall_linux_test.go

@@ -482,3 +482,36 @@ func TestSyncFileRange(t *testing.T) {
 		t.Fatalf("SyncFileRange: unexpected error: %v, want EINVAL", err)
 	}
 }
+
+func TestClockNanosleep(t *testing.T) {
+	delay := 100 * time.Millisecond
+
+	// Relative timespec.
+	start := time.Now()
+	rel := unix.NsecToTimespec(delay.Nanoseconds())
+	err := unix.ClockNanosleep(unix.CLOCK_MONOTONIC, 0, &rel, nil)
+	if err == unix.ENOSYS || err == unix.EPERM {
+		t.Skip("clock_nanosleep syscall is not available, skipping test")
+	} else if err != nil {
+		t.Errorf("ClockNanosleep(CLOCK_MONOTONIC, 0, %#v, nil) = %v", &rel, err)
+	} else if slept := time.Now().Sub(start); slept < delay {
+		t.Errorf("ClockNanosleep(CLOCK_MONOTONIC, 0, %#v, nil) slept only %v", &rel, slept)
+	}
+
+	// Absolute timespec.
+	start = time.Now()
+	until := start.Add(delay)
+	abs := unix.NsecToTimespec(until.UnixNano())
+	err = unix.ClockNanosleep(unix.CLOCK_REALTIME, unix.TIMER_ABSTIME, &abs, nil)
+	if err != nil {
+		t.Errorf("ClockNanosleep(CLOCK_REALTIME, TIMER_ABSTIME, %#v (=%v), nil) = %v", &abs, until, err)
+	} else if slept := time.Now().Sub(start); slept < delay {
+		t.Errorf("ClockNanosleep(CLOCK_REALTIME, TIMER_ABSTIME, %#v (=%v), nil) slept only %v", &abs, until, slept)
+	}
+
+	// Invalid clock. clock_nanosleep(2) says EINVAL, but it’s actually EOPNOTSUPP.
+	err = unix.ClockNanosleep(unix.CLOCK_THREAD_CPUTIME_ID, 0, &rel, nil)
+	if err != unix.EINVAL && err != unix.EOPNOTSUPP {
+		t.Errorf("ClockNanosleep(CLOCK_THREAD_CPUTIME_ID, 0, %#v, nil) = %v, want EINVAL or EOPNOTSUPP", &rel, err)
+	}
+}

unix/zerrors_linux_386.go

@@ -2101,6 +2101,7 @@ const (
 	TCSETXF                              = 0x5434
 	TCSETXW                              = 0x5435
 	TCXONC                               = 0x540a
+	TIMER_ABSTIME                        = 0x1
 	TIOCCBRK                             = 0x5428
 	TIOCCONS                             = 0x541d
 	TIOCEXCL                             = 0x540c

unix/zerrors_linux_amd64.go

@@ -2102,6 +2102,7 @@ const (
 	TCSETXF                              = 0x5434
 	TCSETXW                              = 0x5435
 	TCXONC                               = 0x540a
+	TIMER_ABSTIME                        = 0x1
 	TIOCCBRK                             = 0x5428
 	TIOCCONS                             = 0x541d
 	TIOCEXCL                             = 0x540c

unix/zerrors_linux_arm.go

@@ -2108,6 +2108,7 @@ const (
 	TCSETXF                              = 0x5434
 	TCSETXW                              = 0x5435
 	TCXONC                               = 0x540a
+	TIMER_ABSTIME                        = 0x1
 	TIOCCBRK                             = 0x5428
 	TIOCCONS                             = 0x541d
 	TIOCEXCL                             = 0x540c

unix/zerrors_linux_arm64.go

@@ -2093,6 +2093,7 @@ const (
 	TCSETXF                              = 0x5434
 	TCSETXW                              = 0x5435
 	TCXONC                               = 0x540a
+	TIMER_ABSTIME                        = 0x1
 	TIOCCBRK                             = 0x5428
 	TIOCCONS                             = 0x541d
 	TIOCEXCL                             = 0x540c

unix/zerrors_linux_mips.go

@@ -2098,6 +2098,7 @@ const (
 	TCSETSW                              = 0x540f
 	TCSETSW2                             = 0x8030542c
 	TCXONC                               = 0x5406
+	TIMER_ABSTIME                        = 0x1
 	TIOCCBRK                             = 0x5428
 	TIOCCONS                             = 0x80047478
 	TIOCEXCL                             = 0x740d

unix/zerrors_linux_mips64.go

@@ -2098,6 +2098,7 @@ const (
 	TCSETSW                              = 0x540f
 	TCSETSW2                             = 0x8030542c
 	TCXONC                               = 0x5406
+	TIMER_ABSTIME                        = 0x1
 	TIOCCBRK                             = 0x5428
 	TIOCCONS                             = 0x80047478
 	TIOCEXCL                             = 0x740d

unix/zerrors_linux_mips64le.go

@@ -2098,6 +2098,7 @@ const (
 	TCSETSW                              = 0x540f
 	TCSETSW2                             = 0x8030542c
 	TCXONC                               = 0x5406
+	TIMER_ABSTIME                        = 0x1
 	TIOCCBRK                             = 0x5428
 	TIOCCONS                             = 0x80047478
 	TIOCEXCL                             = 0x740d

unix/zerrors_linux_mipsle.go

@@ -2098,6 +2098,7 @@ const (
 	TCSETSW                              = 0x540f
 	TCSETSW2                             = 0x8030542c
 	TCXONC                               = 0x5406
+	TIMER_ABSTIME                        = 0x1
 	TIOCCBRK                             = 0x5428
 	TIOCCONS                             = 0x80047478
 	TIOCEXCL                             = 0x740d

unix/zerrors_linux_ppc64.go

@@ -2151,6 +2151,7 @@ const (
 	TCSETSF                              = 0x802c7416
 	TCSETSW                              = 0x802c7415
 	TCXONC                               = 0x2000741e
+	TIMER_ABSTIME                        = 0x1
 	TIOCCBRK                             = 0x5428
 	TIOCCONS                             = 0x541d
 	TIOCEXCL                             = 0x540c

unix/zerrors_linux_ppc64le.go

@@ -2151,6 +2151,7 @@ const (
 	TCSETSF                              = 0x802c7416
 	TCSETSW                              = 0x802c7415
 	TCXONC                               = 0x2000741e
+	TIMER_ABSTIME                        = 0x1
 	TIOCCBRK                             = 0x5428
 	TIOCCONS                             = 0x541d
 	TIOCEXCL                             = 0x540c

unix/zerrors_linux_riscv64.go

@@ -2089,6 +2089,7 @@ const (
 	TCSETXF                              = 0x5434
 	TCSETXW                              = 0x5435
 	TCXONC                               = 0x540a
+	TIMER_ABSTIME                        = 0x1
 	TIOCCBRK                             = 0x5428
 	TIOCCONS                             = 0x541d
 	TIOCEXCL                             = 0x540c

unix/zerrors_linux_s390x.go

@@ -2162,6 +2162,7 @@ const (
 	TCSETXF                              = 0x5434
 	TCSETXW                              = 0x5435
 	TCXONC                               = 0x540a
+	TIMER_ABSTIME                        = 0x1
 	TIOCCBRK                             = 0x5428
 	TIOCCONS                             = 0x541d
 	TIOCEXCL                             = 0x540c

unix/zerrors_linux_sparc64.go

@@ -2150,6 +2150,7 @@ const (
 	TCSETSW                              = 0x8024540a
 	TCSETSW2                             = 0x802c540e
 	TCXONC                               = 0x20005406
+	TIMER_ABSTIME                        = 0x1
 	TIOCCBRK                             = 0x2000747a
 	TIOCCONS                             = 0x20007424
 	TIOCEXCL                             = 0x2000740d

unix/zsyscall_linux_386.go

@@ -437,6 +437,16 @@ func ClockGettime(clockid int32, time *Timespec) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func ClockNanosleep(clockid int32, flags int, request *Timespec, remain *Timespec) (err error) {
+	_, _, e1 := Syscall6(SYS_CLOCK_NANOSLEEP, uintptr(clockid), uintptr(flags), uintptr(unsafe.Pointer(request)), uintptr(unsafe.Pointer(remain)), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Close(fd int) (err error) {
 	_, _, e1 := Syscall(SYS_CLOSE, uintptr(fd), 0, 0)
 	if e1 != 0 {

unix/zsyscall_linux_amd64.go

@@ -437,6 +437,16 @@ func ClockGettime(clockid int32, time *Timespec) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func ClockNanosleep(clockid int32, flags int, request *Timespec, remain *Timespec) (err error) {
+	_, _, e1 := Syscall6(SYS_CLOCK_NANOSLEEP, uintptr(clockid), uintptr(flags), uintptr(unsafe.Pointer(request)), uintptr(unsafe.Pointer(remain)), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Close(fd int) (err error) {
 	_, _, e1 := Syscall(SYS_CLOSE, uintptr(fd), 0, 0)
 	if e1 != 0 {

unix/zsyscall_linux_arm.go

@@ -437,6 +437,16 @@ func ClockGettime(clockid int32, time *Timespec) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func ClockNanosleep(clockid int32, flags int, request *Timespec, remain *Timespec) (err error) {
+	_, _, e1 := Syscall6(SYS_CLOCK_NANOSLEEP, uintptr(clockid), uintptr(flags), uintptr(unsafe.Pointer(request)), uintptr(unsafe.Pointer(remain)), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Close(fd int) (err error) {
 	_, _, e1 := Syscall(SYS_CLOSE, uintptr(fd), 0, 0)
 	if e1 != 0 {

unix/zsyscall_linux_arm64.go

@@ -437,6 +437,16 @@ func ClockGettime(clockid int32, time *Timespec) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func ClockNanosleep(clockid int32, flags int, request *Timespec, remain *Timespec) (err error) {
+	_, _, e1 := Syscall6(SYS_CLOCK_NANOSLEEP, uintptr(clockid), uintptr(flags), uintptr(unsafe.Pointer(request)), uintptr(unsafe.Pointer(remain)), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Close(fd int) (err error) {
 	_, _, e1 := Syscall(SYS_CLOSE, uintptr(fd), 0, 0)
 	if e1 != 0 {

unix/zsyscall_linux_mips.go

@@ -437,6 +437,16 @@ func ClockGettime(clockid int32, time *Timespec) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func ClockNanosleep(clockid int32, flags int, request *Timespec, remain *Timespec) (err error) {
+	_, _, e1 := Syscall6(SYS_CLOCK_NANOSLEEP, uintptr(clockid), uintptr(flags), uintptr(unsafe.Pointer(request)), uintptr(unsafe.Pointer(remain)), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Close(fd int) (err error) {
 	_, _, e1 := Syscall(SYS_CLOSE, uintptr(fd), 0, 0)
 	if e1 != 0 {

unix/zsyscall_linux_mips64.go

@@ -437,6 +437,16 @@ func ClockGettime(clockid int32, time *Timespec) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func ClockNanosleep(clockid int32, flags int, request *Timespec, remain *Timespec) (err error) {
+	_, _, e1 := Syscall6(SYS_CLOCK_NANOSLEEP, uintptr(clockid), uintptr(flags), uintptr(unsafe.Pointer(request)), uintptr(unsafe.Pointer(remain)), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Close(fd int) (err error) {
 	_, _, e1 := Syscall(SYS_CLOSE, uintptr(fd), 0, 0)
 	if e1 != 0 {

unix/zsyscall_linux_mips64le.go

@@ -437,6 +437,16 @@ func ClockGettime(clockid int32, time *Timespec) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func ClockNanosleep(clockid int32, flags int, request *Timespec, remain *Timespec) (err error) {
+	_, _, e1 := Syscall6(SYS_CLOCK_NANOSLEEP, uintptr(clockid), uintptr(flags), uintptr(unsafe.Pointer(request)), uintptr(unsafe.Pointer(remain)), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Close(fd int) (err error) {
 	_, _, e1 := Syscall(SYS_CLOSE, uintptr(fd), 0, 0)
 	if e1 != 0 {

unix/zsyscall_linux_mipsle.go

@@ -437,6 +437,16 @@ func ClockGettime(clockid int32, time *Timespec) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func ClockNanosleep(clockid int32, flags int, request *Timespec, remain *Timespec) (err error) {
+	_, _, e1 := Syscall6(SYS_CLOCK_NANOSLEEP, uintptr(clockid), uintptr(flags), uintptr(unsafe.Pointer(request)), uintptr(unsafe.Pointer(remain)), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Close(fd int) (err error) {
 	_, _, e1 := Syscall(SYS_CLOSE, uintptr(fd), 0, 0)
 	if e1 != 0 {

unix/zsyscall_linux_ppc64.go

@@ -437,6 +437,16 @@ func ClockGettime(clockid int32, time *Timespec) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func ClockNanosleep(clockid int32, flags int, request *Timespec, remain *Timespec) (err error) {
+	_, _, e1 := Syscall6(SYS_CLOCK_NANOSLEEP, uintptr(clockid), uintptr(flags), uintptr(unsafe.Pointer(request)), uintptr(unsafe.Pointer(remain)), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Close(fd int) (err error) {
 	_, _, e1 := Syscall(SYS_CLOSE, uintptr(fd), 0, 0)
 	if e1 != 0 {

unix/zsyscall_linux_ppc64le.go

@@ -437,6 +437,16 @@ func ClockGettime(clockid int32, time *Timespec) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func ClockNanosleep(clockid int32, flags int, request *Timespec, remain *Timespec) (err error) {
+	_, _, e1 := Syscall6(SYS_CLOCK_NANOSLEEP, uintptr(clockid), uintptr(flags), uintptr(unsafe.Pointer(request)), uintptr(unsafe.Pointer(remain)), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Close(fd int) (err error) {
 	_, _, e1 := Syscall(SYS_CLOSE, uintptr(fd), 0, 0)
 	if e1 != 0 {

unix/zsyscall_linux_riscv64.go

@@ -437,6 +437,16 @@ func ClockGettime(clockid int32, time *Timespec) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func ClockNanosleep(clockid int32, flags int, request *Timespec, remain *Timespec) (err error) {
+	_, _, e1 := Syscall6(SYS_CLOCK_NANOSLEEP, uintptr(clockid), uintptr(flags), uintptr(unsafe.Pointer(request)), uintptr(unsafe.Pointer(remain)), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Close(fd int) (err error) {
 	_, _, e1 := Syscall(SYS_CLOSE, uintptr(fd), 0, 0)
 	if e1 != 0 {

unix/zsyscall_linux_s390x.go

@@ -437,6 +437,16 @@ func ClockGettime(clockid int32, time *Timespec) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func ClockNanosleep(clockid int32, flags int, request *Timespec, remain *Timespec) (err error) {
+	_, _, e1 := Syscall6(SYS_CLOCK_NANOSLEEP, uintptr(clockid), uintptr(flags), uintptr(unsafe.Pointer(request)), uintptr(unsafe.Pointer(remain)), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Close(fd int) (err error) {
 	_, _, e1 := Syscall(SYS_CLOSE, uintptr(fd), 0, 0)
 	if e1 != 0 {

unix/zsyscall_linux_sparc64.go

@@ -437,6 +437,16 @@ func ClockGettime(clockid int32, time *Timespec) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func ClockNanosleep(clockid int32, flags int, request *Timespec, remain *Timespec) (err error) {
+	_, _, e1 := Syscall6(SYS_CLOCK_NANOSLEEP, uintptr(clockid), uintptr(flags), uintptr(unsafe.Pointer(request)), uintptr(unsafe.Pointer(remain)), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Close(fd int) (err error) {
 	_, _, e1 := Syscall(SYS_CLOSE, uintptr(fd), 0, 0)
 	if e1 != 0 {