[RFC PATCH 3/5] wineboot: Open update-timestamp read-only first.

[Rémi Bernon]

Opening it with O_RDWR makes the overlay copy it to the upper layer,
although we are only reading it first.
---
 programs/wineboot/wineboot.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/programs/wineboot/wineboot.c b/programs/wineboot/wineboot.c
index 913c967d4d4d..2463b7a0e050 100644
--- a/programs/wineboot/wineboot.c
+++ b/programs/wineboot/wineboot.c
@@ -123,7 +123,7 @@ static BOOL update_timestamp( const WCHAR *config_dir, unsigned long timestamp )
     int fd, count;
     char buffer[100];
 
-    if ((fd = _wopen( timestampW, O_RDWR )) != -1)
+    if ((fd = _wopen( timestampW, O_RDONLY )) != -1)
     {
         if ((count = read( fd, buffer, sizeof(buffer) - 1 )) >= 0)
         {
@@ -131,14 +131,11 @@ static BOOL update_timestamp( const WCHAR *config_dir, unsigned long timestamp )
             if (!strncmp( buffer, "disable", sizeof("disable")-1 )) goto done;
             if (timestamp == strtoul( buffer, NULL, 10 )) goto done;
         }
-        lseek( fd, 0, SEEK_SET );
-        chsize( fd, 0 );
-    }
-    else
-    {
-        if (errno != ENOENT) goto done;
-        if ((fd = _wopen( timestampW, O_WRONLY | O_CREAT | O_TRUNC, 0666 )) == -1) goto done;
+        close( fd );
     }
+    else if (errno != ENOENT) goto done;
+
+    if ((fd = _wopen( timestampW, O_WRONLY | O_CREAT | O_TRUNC, 0666 )) == -1) goto done;
 
     count = sprintf( buffer, "%lu\n", timestamp );
     if (write( fd, buffer, count ) != count)
-- 
2.26.0.rc2