2 files changed, 32 insertions, 0 deletions
diff --git a/fs/fs.c b/fs/fs.c
index 7da3a050c1..60fdb29078 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -2846,6 +2846,36 @@ out:
 }
 EXPORT_SYMBOL(chdir);
 
+char *pushd(const char *dir)
+{
+	char *oldcwd;
+	int ret;
+
+	oldcwd = strdup(getcwd());
+	if (!oldcwd)
+		return NULL;
+
+	ret = chdir(dir);
+	if (ret) {
+		free(oldcwd);
+		return NULL;
+	}
+
+	return oldcwd;
+}
+
+int popd(char *oldcwd)
+{
+	int ret;
+
+	if (!oldcwd)
+		return 0;
+
+	ret = chdir(oldcwd);
+	free(oldcwd);
+	return ret;
+}
+
 static char *get_linux_mmcblkdev(struct fs_device_d *fsdev)
 {
 	struct cdev *cdevm, *cdev;
diff --git a/include/unistd.h b/include/unistd.h
index 06ce355809..f7fe737d00 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -20,6 +20,8 @@ int rmdir (const char *pathname);
 int symlink(const char *pathname, const char *newpath);
 int readlink(const char *path, char *buf, size_t bufsiz);
 int chdir(const char *pathname);
+char *pushd(const char *dir);
+int popd(char *dir);
 const char *getcwd(void);
 int ftruncate(int fd, loff_t length);