[PATCH v4 03/16] hw/9pfs: Replace the direct call to xxxdir() APIs with a wrapper

[Bin Meng]

From: Guohuai Shi <guohuai.shi@windriver.com>

xxxdir() APIs are not safe on Windows host. For future extension to
Windows, let's replace the direct call to xxxdir() APIs with a wrapper.

Signed-off-by: Guohuai Shi <guohuai.shi@windriver.com>
Signed-off-by: Bin Meng <bin.meng@windriver.com>
---

 hw/9pfs/9p-util.h  | 14 ++++++++++++++
 hw/9pfs/9p-local.c | 12 ++++++------
 2 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/hw/9pfs/9p-util.h b/hw/9pfs/9p-util.h
index 90420a7578..0f159fb4ce 100644
--- a/hw/9pfs/9p-util.h
+++ b/hw/9pfs/9p-util.h
@@ -103,6 +103,13 @@ static inline int errno_to_dotl(int err) {
 #define qemu_renameat   renameat_win32
 #define qemu_utimensat  utimensat_win32
 #define qemu_unlinkat   unlinkat_win32
+
+#define qemu_opendir    opendir_win32
+#define qemu_closedir   closedir_win32
+#define qemu_readdir    readdir_win32
+#define qeme_rewinddir  rewinddir_win32
+#define qemu_seekdir    seekdir_win32
+#define qemu_telldir    telldir_win32
 #else
 #define qemu_openat     openat
 #define qemu_fstatat    fstatat
@@ -110,6 +117,13 @@ static inline int errno_to_dotl(int err) {
 #define qemu_renameat   renameat
 #define qemu_utimensat  utimensat
 #define qemu_unlinkat   unlinkat
+
+#define qemu_opendir    opendir
+#define qemu_closedir   closedir
+#define qemu_readdir    readdir
+#define qeme_rewinddir  rewinddir
+#define qemu_seekdir    seekdir
+#define qemu_telldir    telldir
 #endif
 
 #ifdef CONFIG_WIN32
diff --git a/hw/9pfs/9p-local.c b/hw/9pfs/9p-local.c
index b6102c9e5a..4385f18da2 100644
--- a/hw/9pfs/9p-local.c
+++ b/hw/9pfs/9p-local.c
@@ -495,7 +495,7 @@ static int local_close(FsContext *ctx, V9fsFidOpenState *fs)
 
 static int local_closedir(FsContext *ctx, V9fsFidOpenState *fs)
 {
-    return closedir(fs->dir.stream);
+    return qemu_closedir(fs->dir.stream);
 }
 
 static int local_open(FsContext *ctx, V9fsPath *fs_path,
@@ -533,12 +533,12 @@ static int local_opendir(FsContext *ctx,
 
 static void local_rewinddir(FsContext *ctx, V9fsFidOpenState *fs)
 {
-    rewinddir(fs->dir.stream);
+    qeme_rewinddir(fs->dir.stream);
 }
 
 static off_t local_telldir(FsContext *ctx, V9fsFidOpenState *fs)
 {
-    return telldir(fs->dir.stream);
+    return qemu_telldir(fs->dir.stream);
 }
 
 static bool local_is_mapped_file_metadata(FsContext *fs_ctx, const char *name)
@@ -552,13 +552,13 @@ static struct dirent *local_readdir(FsContext *ctx, 
V9fsFidOpenState *fs)
     struct dirent *entry;
 
 again:
-    entry = readdir(fs->dir.stream);
+    entry = qemu_readdir(fs->dir.stream);
     if (!entry) {
         return NULL;
     }
 #ifdef CONFIG_DARWIN
     int off;
-    off = telldir(fs->dir.stream);
+    off = qemu_telldir(fs->dir.stream);
     /* If telldir fails, fail the entire readdir call */
     if (off < 0) {
         return NULL;
@@ -581,7 +581,7 @@ again:
 
 static void local_seekdir(FsContext *ctx, V9fsFidOpenState *fs, off_t off)
 {
-    seekdir(fs->dir.stream, off);
+    qemu_seekdir(fs->dir.stream, off);
 }
 
 static ssize_t local_preadv(FsContext *ctx, V9fsFidOpenState *fs,
-- 
2.25.1