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// errstr_linux.go -- GNU/Linux specific error strings.
// Copyright 2010 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.
// We use this rather than errstr.go because on GNU/Linux sterror_r
// returns a pointer to the error message, and may not use buf at all.
package syscall
import "unsafe"
//sysnb strerror_r(errnum int, b []byte) (errstr *byte)
//strerror_r(errnum _C_int, b *byte, len Size_t) *byte
func Errstr(errnum int) string {
a := make([]byte, 128)
p := strerror_r(errnum, a)
b := (*[1000]byte)(unsafe.Pointer(p))
i := 0
for b[i] != 0 {
i++
}
// Lowercase first letter: Bad -> bad, but STREAM -> STREAM.
if i > 1 && 'A' <= b[0] && b[0] <= 'Z' && 'a' <= b[1] && b[1] <= 'z' {
c := b[0] + 'a' - 'A'
return string(c) + string(b[1:i])
}
return string(b[:i])
}
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