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os: avoid panic when testing errors on Plan 9

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R=golang-dev, bradfitz, akumar
CC=golang-dev
https://golang.org/cl/6017043
This commit is contained in:
Anthony Martin 2012-04-16 17:36:02 -07:00
parent 4cf577edf9
commit 74607d18c5
1 changed files with 9 additions and 0 deletions
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9
src/pkg/os/error_plan9.go
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@ -5,6 +5,9 @@
package os
func isExist(err error) bool {
if err == nil {
return false
}
if pe, ok := err.(*PathError); ok {
err = pe.Err
}
@ -12,6 +15,9 @@ func isExist(err error) bool {
}
func isNotExist(err error) bool {
if err == nil {
return false
}
if pe, ok := err.(*PathError); ok {
err = pe.Err
}
@ -19,6 +25,9 @@ func isNotExist(err error) bool {
}
func isPermission(err error) bool {
if err == nil {
return false
}
if pe, ok := err.(*PathError); ok {
err = pe.Err
}