3 files changed, 17 insertions, 0 deletions
diff --git a/src/lib/os/file.go b/src/lib/os/file.go
index 3010deeab7..48daf0bce4 100644
--- a/src/lib/os/file.go
+++ b/src/lib/os/file.go
@@ -261,3 +261,9 @@ func (file *File) Readdir(count int) (dirs []Dir, err *os.Error) {
 	return
 }
 
+// Chdir changes the current working directory to the named directory.
+func Chdir(dir string) *os.Error {
+	r, e := syscall.Chdir(dir);
+	return ErrnoToError(e);
+}
+
diff --git a/src/lib/syscall/file_darwin.go b/src/lib/syscall/file_darwin.go
index 5d128f743c..b0777b5df4 100644
--- a/src/lib/syscall/file_darwin.go
+++ b/src/lib/syscall/file_darwin.go
@@ -98,3 +98,9 @@ func Getdirentries(fd int64, buf *byte, nbytes int64, basep *int64) (ret int64,
 	r1, r2, err := Syscall6(SYS_GETDIRENTRIES64, fd, int64(uintptr(unsafe.Pointer(buf))), nbytes, int64(uintptr(unsafe.Pointer(basep))), 0, 0);
 	return r1, err;
 }
+
+func Chdir(dir string) (ret int64, errno int64) {
+	namebuf := StringBytePtr(dir);
+	r1, r2, err := Syscall(SYS_CHDIR, int64(uintptr(unsafe.Pointer(namebuf))), 0, 0);
+	return r1, err;
+}
diff --git a/src/lib/syscall/file_linux.go b/src/lib/syscall/file_linux.go
index ceb0a85d76..9bf4408846 100644
--- a/src/lib/syscall/file_linux.go
+++ b/src/lib/syscall/file_linux.go
@@ -100,3 +100,8 @@ func Getdents(fd int64, buf *Dirent, nbytes int64) (ret int64, errno int64) {
 	return r1, err;
 }
 
+func Chdir(dir string) (ret int64, errno int64) {
+	namebuf := StringBytePtr(dir);
+	r1, r2, err := Syscall(SYS_CHDIR, int64(uintptr(unsafe.Pointer(namebuf))), 0, 0);
+	return r1, err;
+}