github.com/ccccaoqing/test@v0.0.0-20220510085219-3985d23445c0/src/os/error_unix.go (about)

     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 dragonfly freebsd linux nacl netbsd openbsd solaris
     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  }