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// errstr.go -- Error strings.

// 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.

package syscall

//sysnb strerror_r(errnum int, buf []byte) (err error)
//strerror_r(errnum int, buf *byte, buflen Size_t) int

func Errstr(errnum int) string {
        for len := 128; ; len *= 2 {
                b := make([]byte, len)
                err := strerror_r(errnum, b)
                if err == nil {
                        i := 0
                        for b[i] != 0 {
                                i++
                        }
                        return string(b[:i])
                }
                if err != ERANGE {
                        return "Errstr failure"
                }
        }
}