Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 1 | // Copyright 2011 The Go Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | // +build plan9 |
| 6 | |
| 7 | package time |
| 8 | |
| 9 | import ( |
| 10 | "errors" |
| 11 | "syscall" |
| 12 | ) |
| 13 | |
| 14 | // for testing: whatever interrupts a sleep |
| 15 | func interrupt() { |
| 16 | // cannot predict pid, don't want to kill group |
| 17 | } |
| 18 | |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 19 | func open(name string) (uintptr, error) { |
| 20 | fd, err := syscall.Open(name, syscall.O_RDONLY) |
| 21 | if err != nil { |
| 22 | return 0, err |
| 23 | } |
| 24 | return uintptr(fd), nil |
| 25 | } |
| 26 | |
Dan Willemsen | a322328 | 2018-02-27 19:41:43 -0800 | [diff] [blame^] | 27 | func read(fd uintptr, buf []byte) (int, error) { |
| 28 | return syscall.Read(int(fd), buf) |
| 29 | } |
| 30 | |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 31 | func closefd(fd uintptr) { |
| 32 | syscall.Close(int(fd)) |
| 33 | } |
| 34 | |
| 35 | func preadn(fd uintptr, buf []byte, off int) error { |
Dan Willemsen | 38f2dba | 2016-07-08 14:54:35 -0700 | [diff] [blame] | 36 | whence := seekStart |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 37 | if off < 0 { |
Dan Willemsen | 38f2dba | 2016-07-08 14:54:35 -0700 | [diff] [blame] | 38 | whence = seekEnd |
Brent Austin | ba3052e | 2015-04-21 16:08:23 -0700 | [diff] [blame] | 39 | } |
| 40 | if _, err := syscall.Seek(int(fd), int64(off), whence); err != nil { |
| 41 | return err |
| 42 | } |
| 43 | for len(buf) > 0 { |
| 44 | m, err := syscall.Read(int(fd), buf) |
| 45 | if m <= 0 { |
| 46 | if err == nil { |
| 47 | return errors.New("short read") |
| 48 | } |
| 49 | return err |
| 50 | } |
| 51 | buf = buf[m:] |
| 52 | } |
| 53 | return nil |
| 54 | } |