sys_unix.go

Documentation: time

		 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  //go:build aix || darwin || dragonfly || freebsd || (js && wasm) || linux || netbsd || openbsd || solaris
		 6  // +build aix darwin dragonfly freebsd js,wasm linux netbsd openbsd solaris
		 7  
		 8  package time
		 9  
		10  import (
		11  	"errors"
		12  	"syscall"
		13  )
		14  
		15  // for testing: whatever interrupts a sleep
		16  func interrupt() {
		17  	syscall.Kill(syscall.Getpid(), syscall.SIGCHLD)
		18  }
		19  
		20  func open(name string) (uintptr, error) {
		21  	fd, err := syscall.Open(name, syscall.O_RDONLY, 0)
		22  	if err != nil {
		23  		return 0, err
		24  	}
		25  	return uintptr(fd), nil
		26  }
		27  
		28  func read(fd uintptr, buf []byte) (int, error) {
		29  	return syscall.Read(int(fd), buf)
		30  }
		31  
		32  func closefd(fd uintptr) {
		33  	syscall.Close(int(fd))
		34  }
		35  
		36  func preadn(fd uintptr, buf []byte, off int) error {
		37  	whence := seekStart
		38  	if off < 0 {
		39  		whence = seekEnd
		40  	}
		41  	if _, err := syscall.Seek(int(fd), int64(off), whence); err != nil {
		42  		return err
		43  	}
		44  	for len(buf) > 0 {
		45  		m, err := syscall.Read(int(fd), buf)
		46  		if m <= 0 {
		47  			if err == nil {
		48  				return errors.New("short read")
		49  			}
		50  			return err
		51  		}
		52  		buf = buf[m:]
		53  	}
		54  	return nil
		55  }
		56
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