From 2447dcd1eab85d21de4f17c21ff74c291d721af1 Mon Sep 17 00:00:00 2001
From: Gunnar Beutner <gunnar@beutner.name>
Date: Sun, 25 Apr 2021 09:41:45 +0200
Subject: [PATCH] LibC: Implement the rewinddir() function

---
 Userland/Libraries/LibC/dirent.cpp | 12 ++++++++++--
 Userland/Libraries/LibC/dirent.h   |  1 +
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/Userland/Libraries/LibC/dirent.cpp b/Userland/Libraries/LibC/dirent.cpp
index 460d88c2ac..241c7a1113 100644
--- a/Userland/Libraries/LibC/dirent.cpp
+++ b/Userland/Libraries/LibC/dirent.cpp
@@ -35,8 +35,7 @@ int closedir(DIR* dirp)
 {
     if (!dirp || dirp->fd == -1)
         return -EBADF;
-    if (dirp->buffer)
-        free(dirp->buffer);
+    free(dirp->buffer);
     int rc = close(dirp->fd);
     if (rc == 0)
         dirp->fd = -1;
@@ -44,6 +43,15 @@ int closedir(DIR* dirp)
     return rc;
 }
 
+void rewinddir(DIR* dirp)
+{
+    free(dirp->buffer);
+    dirp->buffer = nullptr;
+    dirp->buffer_size = 0;
+    dirp->nextptr = nullptr;
+    lseek(dirp->fd, 0, SEEK_SET);
+}
+
 struct [[gnu::packed]] sys_dirent {
     ino_t ino;
     u8 file_type;
diff --git a/Userland/Libraries/LibC/dirent.h b/Userland/Libraries/LibC/dirent.h
index 821fbdcd74..d468e33e6c 100644
--- a/Userland/Libraries/LibC/dirent.h
+++ b/Userland/Libraries/LibC/dirent.h
@@ -50,6 +50,7 @@ typedef struct __DIR DIR;
 
 DIR* opendir(const char* name);
 int closedir(DIR*);
+void rewinddir(DIR*);
 struct dirent* readdir(DIR*);
 int readdir_r(DIR*, struct dirent*, struct dirent**);
 int dirfd(DIR*);