| // 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 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 |
| |
| // 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) { |
| for i := 0; i < len(s); i++ { |
| if s[i] == 0 { |
| 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 |
| |
| func (ts *Timespec) Unix() (sec int64, nsec int64) { |
| return int64(ts.Sec), int64(ts.Nsec) |
| } |
| |
| func (tv *Timeval) Unix() (sec int64, nsec int64) { |
| return int64(tv.Sec), int64(tv.Usec) * 1000 |
| } |
| |
| func (ts *Timespec) Nano() int64 { |
| return int64(ts.Sec)*1e9 + int64(ts.Nsec) |
| } |
| |
| func (tv *Timeval) Nano() int64 { |
| return int64(tv.Sec)*1e9 + int64(tv.Usec)*1000 |
| } |
| |
| func TimevalToNsec(tv Timeval) int64 { return int64(tv.Sec)*1e9 + int64(tv.Usec)*1e3 } |