osdep/io: implement rename() wrapper

This is needed to provide the POSIX behaviour of transparently
overwriting existing paths.

2 files changed, 16 insertions, 0 deletions

diff --git a/osdep/io.c b/osdep/io.c
index 8c114c066c..bdf79f8894 100644
--- a/osdep/io.c
+++ b/osdep/io.c
@@ -484,6 +484,20 @@ int mp_creat(const char *filename, int mode)
     return mp_open(filename, _O_CREAT | _O_WRONLY | _O_TRUNC, mode);
 }
 
+int mp_rename(const char *oldpath, const char *newpath)
+{
+    wchar_t *woldpath = mp_from_utf8(NULL, oldpath),
+        *wnewpath = mp_from_utf8(NULL, newpath);
+    BOOL ok = MoveFileExW(woldpath, wnewpath, MOVEFILE_REPLACE_EXISTING);
+    talloc_free(woldpath);
+    talloc_free(wnewpath);
+    if (!ok) {
+        set_errno_from_lasterror();
+        return -1;
+    }
+    return 0;
+}
+
 FILE *mp_fopen(const char *filename, const char *mode)
 {
     if (!mode[0]) {
diff --git a/osdep/io.h b/osdep/io.h
index 6f398c7f95..db711fb265 100644
--- a/osdep/io.h
+++ b/osdep/io.h
@@ -98,6 +98,7 @@ int mp_printf(const char *format, ...);
 int mp_fprintf(FILE *stream, const char *format, ...);
 int mp_open(const char *filename, int oflag, ...);
 int mp_creat(const char *filename, int mode);
+int mp_rename(const char *oldpath, const char *newpath);
 FILE *mp_fopen(const char *filename, const char *mode);
 DIR *mp_opendir(const char *path);
 struct dirent *mp_readdir(DIR *dir);
@@ -164,6 +165,7 @@ void mp_globfree(mp_glob_t *pglob);
 #define fprintf(...) mp_fprintf(__VA_ARGS__)
 #define open(...) mp_open(__VA_ARGS__)
 #define creat(...) mp_creat(__VA_ARGS__)
+#define rename(...) mp_rename(__VA_ARGS__)
 #define fopen(...) mp_fopen(__VA_ARGS__)
 #define opendir(...) mp_opendir(__VA_ARGS__)
 #define readdir(...) mp_readdir(__VA_ARGS__)