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// errstr.go -- Error strings when there is no strerror_r.
// Copyright 2011 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
import (
"sync"
"unsafe"
)
//sysnb strerror(errnum int) (buf *byte)
//strerror(errnum _C_int) *byte
var errstr_lock sync.Mutex
func Errstr(errno int) string {
errstr_lock.Lock()
bp := strerror(errno)
b := (*[1000]byte)(unsafe.Pointer(bp))
i := 0
for b[i] != 0 {
i++
}
// Lowercase first letter: Bad -> bad, but STREAM -> STREAM.
var s string
if i > 1 && 'A' <= b[0] && b[0] <= 'Z' && 'a' <= b[1] && b[1] <= 'z' {
c := b[0] + 'a' - 'A'
s = string(c) + string(b[1:i])
} else {
s = string(b[:i])
}
errstr_lock.Unlock()
return s
}
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