mirror of
https://github.com/golang/go
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71 lines
1.5 KiB
Go
71 lines
1.5 KiB
Go
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package os
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import (
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"os";
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"syscall";
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)
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func ForkExec(argv0 string, argv []string, envv []string, fd []*FD)
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(pid int, err *Error)
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{
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// Create array of integer (system) fds.
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intfd := make([]int64, len(fd));
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for i, f := range(fd) {
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if f == nil {
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intfd[i] = -1;
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} else {
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intfd[i] = f.Fd();
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}
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}
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p, e := syscall.ForkExec(argv0, argv, envv, intfd);
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return int(p), ErrnoToError(e);
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}
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func Exec(argv0 string, argv []string, envv []string) *Error {
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e := syscall.Exec(argv0, argv, envv);
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return ErrnoToError(e);
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}
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// TODO(rsc): Should os implement its own syscall.WaitStatus
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// wrapper with the methods, or is exposing the underlying one enough?
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//
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// TODO(rsc): Certainly need to have os.Rusage struct,
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// since syscall one might have different field types across
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// different OS.
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type Waitmsg struct {
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Pid int;
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syscall.WaitStatus;
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Rusage *syscall.Rusage;
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}
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const (
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WNOHANG = syscall.WNOHANG;
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WSTOPPED = syscall.WSTOPPED;
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WRUSAGE = 1<<60;
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)
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func Wait(pid int, options uint64) (w *Waitmsg, err *Error) {
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var status syscall.WaitStatus;
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var rusage *syscall.Rusage;
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if options & WRUSAGE != 0 {
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rusage = new(syscall.Rusage);
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options ^= WRUSAGE;
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}
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pid1, e := syscall.Wait4(int64(pid), &status, int64(options), rusage);
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if e != 0 {
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return nil, ErrnoToError(e);
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}
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w = new(Waitmsg);
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w.Pid = pid;
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w.WaitStatus = status;
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w.Rusage = rusage;
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return w, nil;
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}
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