Source file src/pkg/time/sys_plan9.go

     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	

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