[PATCH] Close the index file between writing and committing

[PATCH] Close the index file between writing and committing

[Johannes Schindelin]

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---

	This is just playing it safe.

	Alternatively, write_cache() could be taught to close the file
	itself, but maybe there will be a user of write_cache() who wants
	to write something after the cache data?

 builtin-add.c          |    2 +-
 builtin-apply.c        |    2 +-
 builtin-read-tree.c    |    2 +-
 builtin-rm.c           |    2 +-
 builtin-update-index.c |    2 +-
 builtin-write-tree.c   |    3 ++-
 checkout-index.c       |    2 +-
 7 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/builtin-add.c b/builtin-add.c
index bfbbb1b..2d25698 100644
--- a/builtin-add.c
+++ b/builtin-add.c
@@ -181,7 +181,7 @@ int cmd_add(int argc, const char **argv,
 
 	if (active_cache_changed) {
 		if (write_cache(newfd, active_cache, active_nr) ||
-		    commit_lock_file(&lock_file))
+		    close(newfd) || commit_lock_file(&lock_file))
 			die("Unable to write new index file");
 	}
 
diff --git a/builtin-apply.c b/builtin-apply.c
index e9ead00..c3af489 100644
--- a/builtin-apply.c
+++ b/builtin-apply.c
@@ -2323,7 +2323,7 @@ int cmd_apply(int argc, const char **arg
 
 	if (write_index) {
 		if (write_cache(newfd, active_cache, active_nr) ||
-		    commit_lock_file(&lock_file))
+		    close(newfd) || commit_lock_file(&lock_file))
 			die("Unable to write new index file");
 	}
 
diff --git a/builtin-read-tree.c b/builtin-read-tree.c
index 9a2099d..23a8d92 100644
--- a/builtin-read-tree.c
+++ b/builtin-read-tree.c
@@ -1038,7 +1038,7 @@ int cmd_read_tree(int argc, const char *
 	}
 
 	if (write_cache(newfd, active_cache, active_nr) ||
-	    commit_lock_file(&lock_file))
+	    close(newfd) || commit_lock_file(&lock_file))
 		die("unable to write new index file");
 	return 0;
 }
diff --git a/builtin-rm.c b/builtin-rm.c
index 4d56a1f..875d825 100644
--- a/builtin-rm.c
+++ b/builtin-rm.c
@@ -147,7 +147,7 @@ int cmd_rm(int argc, const char **argv, 
 
 	if (active_cache_changed) {
 		if (write_cache(newfd, active_cache, active_nr) ||
-		    commit_lock_file(&lock_file))
+		    close(newfd) || commit_lock_file(&lock_file))
 			die("Unable to write new index file");
 	}
 
diff --git a/builtin-update-index.c b/builtin-update-index.c
index ef50243..1a4200d 100644
--- a/builtin-update-index.c
+++ b/builtin-update-index.c
@@ -648,7 +648,7 @@ int cmd_update_index(int argc, const cha
  finish:
 	if (active_cache_changed) {
 		if (write_cache(newfd, active_cache, active_nr) ||
-		    commit_lock_file(lock_file))
+		    close(newfd) || commit_lock_file(lock_file))
 			die("Unable to write new index file");
 	}
 
diff --git a/builtin-write-tree.c b/builtin-write-tree.c
index 70e9b6f..449a4d1 100644
--- a/builtin-write-tree.c
+++ b/builtin-write-tree.c
@@ -35,7 +35,8 @@ int write_tree(unsigned char *sha1, int 
 				      missing_ok, 0) < 0)
 			die("git-write-tree: error building trees");
 		if (0 <= newfd) {
-			if (!write_cache(newfd, active_cache, active_nr))
+			if (!write_cache(newfd, active_cache, active_nr)
+					&& !close(newfd))
 				commit_lock_file(lock_file);
 		}
 		/* Not being able to write is fine -- we are only interested
diff --git a/checkout-index.c b/checkout-index.c
index ea40bc2..2927955 100644
--- a/checkout-index.c
+++ b/checkout-index.c
@@ -311,7 +311,7 @@ int main(int argc, char **argv)
 
 	if (0 <= newfd &&
 	    (write_cache(newfd, active_cache, active_nr) ||
-	     commit_lock_file(&lock_file)))
+	     close(newfd) || commit_lock_file(&lock_file)))
 		die("Unable to write new index file");
 	return 0;
 }
-- 
1.4.1.rc2.g5b68a

Re: [PATCH] Close the index file between writing and committing

[Junio C Hamano]

Johannes Schindelin <Johannes.Schindelin@gmx.de> writes:

> 	Alternatively, write_cache() could be taught to close the file
> 	itself, but maybe there will be a user of write_cache() who wants
> 	to write something after the cache data?

Currently I suspect nobody would want to append stuff to the
index file, because anybody who wants to add something to the
cache can do so with the index extension mechanism.

However, it is conceivable that later we might invent a new
program that writes the index file and other things to a single
stream, and closing the fd in write_cache() would inconvenience
such a program.