github.com/llvm-mirror/llgo@v0.0.0-20190322182713-bf6f0a60fce1/third_party/gofrontend/libgo/go/syscall/errstr_linux.go (about)

     1  // errstr_rtems.go -- RTEMS specific error strings.
     2  
     3  // Copyright 2010 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  import "unsafe"
    10  
    11  //sysnb	strerror_r(errnum int, b []byte) (errstr *byte)
    12  //strerror_r(errnum _C_int, b *byte, len Size_t) *byte
    13  
    14  func Errstr(errnum int) string {
    15  	a := make([]byte, 128)
    16  	p := strerror_r(errnum, a)
    17  	b := (*[1000]byte)(unsafe.Pointer(p))
    18  	i := 0
    19  	for b[i] != 0 {
    20  		i++
    21  	}
    22  	// Lowercase first letter: Bad -> bad, but STREAM -> STREAM.
    23  	if i > 1 && 'A' <= b[0] && b[0] <= 'Z' && 'a' <= b[1] && b[1] <= 'z' {
    24  		c := b[0] + 'a' - 'A'
    25  		return string(c) + string(b[1:i])
    26  	}
    27  	return string(b[:i])
    28  }