From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Wed, 27 Apr 2005 02:27:27 +0000 (-0700)
Subject: Allow writing to the private index file mapping.
X-Git-Tag: v0.99~730
X-Git-Url: https://git.verplant.org/?a=commitdiff_plain;h=520fc2415e83c0adfc1186ee922472c338cb4146;p=git.git

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 2354e803..53f1da81 100644
--- 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)