libgo/syscalls/errstr.go

   1 // errstr.go -- Error strings.
   2
   3 // Copyright 2009 The Go Authors. All rights reserved.
   4 // Use of this source code is governed by a BSD-style
   5 // license that can be found in the LICENSE file.
   6
   7 package syscall
   8
   9 func Errstr(errno int) string {
  10         for len := Size_t(128); ; len *= 2 {
  11                 b := make([]byte, len)
  12                 r := libc_strerror_r(errno, &b[0], len)
  13                 if r >= 0 {
  14                         i := 0
  15                         for b[i] != 0 {
  16                                 i++
  17                         }
  18                         return string(b[:i])
  19                 }
  20                 if GetErrno() != ERANGE {
  21                         return "Errstr failure"
  22                 }
  23         }
  24 }