Allow writing to the private index file mapping.

Linus Torvalds · Linus Torvalds · commit 520fc2415e83 · 2005-04-26T19:27:27.000-07:00
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
@@ -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)

Original file line number	Diff line number	Diff line change
`@@ -198,7 +198,7 @@ int read_cache(void)`
`198`	`198`	`size = st.st_size;`
`199`	`199`	`errno = EINVAL;`
`200`	`200`	`if (size >= sizeof(struct cache_header) + 20)`
`201`		`- map = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);`
	`201`	`+ map = mmap(NULL, size, PROT_READ \| PROT_WRITE, MAP_PRIVATE, fd, 0);`
`202`	`202`	`}`
`203`	`203`	`close(fd);`
`204`	`204`	`if (-1 == (int)(long)map)`