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 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 27 func read(fd uintptr, buf []byte) (int, error) { 28 return syscall.Read(int(fd), buf) 29 } 30 31 func closefd(fd uintptr) { 32 syscall.Close(int(fd)) 33 } 34 35 func preadn(fd uintptr, buf []byte, off int) error { 36 whence := seekStart 37 if off < 0 { 38 whence = seekEnd 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 } 55
