libgo: Update to weekly.2012-03-22.

From-SVN: r186026

1 files changed, 18 insertions, 0 deletions

diff --git a/libgo/go/os/error.go b/libgo/go/os/error.go
index e0b83b5..b88e494 100644
--- a/libgo/go/os/error.go
+++ b/libgo/go/os/error.go
@@ -42,3 +42,21 @@ func NewSyscallError(syscall string, err error) error {
 	}
 	return &SyscallError{syscall, err}
 }
+
+// IsExist returns whether the error is known to report that a file or directory 
+// 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 or directory
+// 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)
+}