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54 lines
2.0 KiB
54 lines
2.0 KiB
// 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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// +build darwin dragonfly freebsd linux netbsd openbsd solaris |
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// Package unix contains an interface to the low-level operating system |
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// primitives. OS details vary depending on the underlying system, and |
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// by default, godoc will display OS-specific documentation for the current |
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// system. If you want godoc to display OS documentation for another |
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// system, set $GOOS and $GOARCH to the desired system. For example, if |
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// you want to view documentation for freebsd/arm on linux/amd64, set $GOOS |
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// to freebsd and $GOARCH to arm. |
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// |
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// The primary use of this package is inside other packages that provide a more |
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// portable interface to the system, such as "os", "time" and "net". Use |
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// those packages rather than this one if you can. |
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// |
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// For details of the functions and data types in this package consult |
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// the manuals for the appropriate operating system. |
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// |
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// These calls return err == nil to indicate success; otherwise |
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// err represents an operating system error describing the failure and |
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// holds a value of type syscall.Errno. |
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package unix // import "golang.org/x/sys/unix" |
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import "strings" |
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// ByteSliceFromString returns a NUL-terminated slice of bytes |
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// containing the text of s. If s contains a NUL byte at any |
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// location, it returns (nil, EINVAL). |
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func ByteSliceFromString(s string) ([]byte, error) { |
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if strings.IndexByte(s, 0) != -1 { |
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return nil, EINVAL |
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} |
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a := make([]byte, len(s)+1) |
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copy(a, s) |
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return a, nil |
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} |
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// BytePtrFromString returns a pointer to a NUL-terminated array of |
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// bytes containing the text of s. If s contains a NUL byte at any |
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// location, it returns (nil, EINVAL). |
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func BytePtrFromString(s string) (*byte, error) { |
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a, err := ByteSliceFromString(s) |
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if err != nil { |
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return nil, err |
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} |
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return &a[0], nil |
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} |
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// Single-word zero for use when we need a valid pointer to 0 bytes. |
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// See mkunix.pl. |
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var _zero uintptr
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