Source file src/pkg/os/error_posix.go

     1	// Copyright 2009 The Go Authors. All rights reserved.
     2	// Use of this source code is governed by a BSD-style
     3	// license that can be found in the LICENSE file.
     4	
     5	// +build darwin freebsd linux netbsd openbsd
     6	
     7	package os
     8	
     9	import "syscall"
    10	
    11	func isExist(err error) bool {
    12		switch pe := err.(type) {
    13		case nil:
    14			return false
    15		case *PathError:
    16			err = pe.Err
    17		case *LinkError:
    18			err = pe.Err
    19		}
    20		return err == syscall.EEXIST || err == ErrExist
    21	}
    22	
    23	func isNotExist(err error) bool {
    24		switch pe := err.(type) {
    25		case nil:
    26			return false
    27		case *PathError:
    28			err = pe.Err
    29		case *LinkError:
    30			err = pe.Err
    31		}
    32		return err == syscall.ENOENT || err == ErrNotExist
    33	}
    34	
    35	func isPermission(err error) bool {
    36		switch pe := err.(type) {
    37		case nil:
    38			return false
    39		case *PathError:
    40			err = pe.Err
    41		case *LinkError:
    42			err = pe.Err
    43		}
    44		return err == syscall.EACCES || err == syscall.EPERM || err == ErrPermission
    45	}

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