Allow writing to the private index file mapping.

We now modify the in-memory copy of the index file in "diff-cache", so
we need to add PROT_WRITE.

diff --git a/read-cache.c b/read-cache.c
index 2354e80..53f1da8 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -198,7 +198,7 @@ int read_cache(void)
                size = st.st_size;
                errno = EINVAL;
                if (size >= sizeof(struct cache_header) + 20)
-                       map = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
+                       map = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
        }
        close(fd);
        if (-1 == (int)(long)map)