// Copyright 2009 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. // +build aix darwin dragonfly freebsd linux netbsd openbsd solaris // Package unix contains an interface to the low-level operating system // primitives. OS details vary depending on the underlying system, and // by default, godoc will display OS-specific documentation for the current // system. If you want godoc to display OS documentation for another // system, set $GOOS and $GOARCH to the desired system. For example, if // you want to view documentation for freebsd/arm on linux/amd64, set $GOOS // to freebsd and $GOARCH to arm. // // The primary use of this package is inside other packages that provide a more // portable interface to the system, such as "os", "time" and "net". Use // those packages rather than this one if you can. // // For details of the functions and data types in this package consult // the manuals for the appropriate operating system. // // These calls return err == nil to indicate success; otherwise // err represents an operating system error describing the failure and // holds a value of type syscall.Errno. package unix // import "golang.org/x/sys/unix" import "strings" // ByteSliceFromString returns a NUL-terminated slice of bytes // containing the text of s. If s contains a NUL byte at any // location, it returns (nil, EINVAL). func ByteSliceFromString(s string) ([]byte, error) { if strings.IndexByte(s, 0) != -1 { return nil, EINVAL } a := make([]byte, len(s)+1) copy(a, s) return a, nil } // BytePtrFromString returns a pointer to a NUL-terminated array of // bytes containing the text of s. If s contains a NUL byte at any // location, it returns (nil, EINVAL). func BytePtrFromString(s string) (*byte, error) { a, err := ByteSliceFromString(s) if err != nil { return nil, err } return &a[0], nil } // Single-word zero for use when we need a valid pointer to 0 bytes. // See mkunix.pl. var _zero uintptr