os: remove document duplication in error predicate functions
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5783092
diff --git a/src/pkg/os/error.go b/src/pkg/os/error.go
index e0b83b5..54c2dc6 100644
--- a/src/pkg/os/error.go
+++ b/src/pkg/os/error.go
@@ -42,3 +42,21 @@
}
return &SyscallError{syscall, err}
}
+
+// IsExist returns whether the error is known to report that a file already exists.
+// It is satisfied by ErrExist as well as some syscall errors.
+func IsExist(err error) bool {
+ return isExist(err)
+}
+
+// IsNotExist returns whether the error is known to report that a file does not exist.
+// It is satisfied by ErrNotExist as well as some syscall errors.
+func IsNotExist(err error) bool {
+ return isNotExist(err)
+}
+
+// IsPermission returns whether the error is known to report that permission is denied.
+// It is satisfied by ErrPermission as well as some syscall errors.
+func IsPermission(err error) bool {
+ return isPermission(err)
+}
