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[PATCH 8/8] use write_file_buf where applicable

From
Jeff King <peff@peff.net>
Date
Jul 8, 2016, 09:12 UTC
Message-ID
<20160708091255.GH10152@sigill.intra.peff.net>
In-Reply-To
<20160708090400.GA26594@sigill.intra.peff.net>

There are several places where we open a file, write some content from a strbuf, and close it. These can be simplified with write_file_buf(). As a bonus, many of these did not catch write problems at close() time.

Signed-off-by: Jeff King <peff@peff.net>
---
 builtin/am.c    |  7 +------
 builtin/merge.c | 45 +++++----------------------------------------
 2 files changed, 6 insertions(+), 46 deletions(-)
diff --git a/builtin/am.c b/builtin/am.c
index 339e360..3ac2448 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -403,13 +403,8 @@ static int read_commit_msg(struct am_state *state)
  */
 static void write_commit_msg(const struct am_state *state)
 {
-	int fd;
 	const char *filename = am_path(state, "final-commit");
-
-	fd = xopen(filename, O_WRONLY | O_CREAT, 0666);
-	if (write_in_full(fd, state->msg, state->msg_len) < 0)
-		die_errno(_("could not write to %s"), filename);
-	close(fd);
+	write_file_buf(filename, state->msg, state->msg_len);
 }
 
 /**
diff --git a/builtin/merge.c b/builtin/merge.c
index b555a1b..2e782db 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -336,15 +336,9 @@ static void squash_message(struct commit *commit, struct commit_list *remotehead
 	struct rev_info rev;
 	struct strbuf out = STRBUF_INIT;
 	struct commit_list *j;
-	const char *filename;
-	int fd;
 	struct pretty_print_context ctx = {0};
 
 	printf(_("Squash commit -- not updating HEAD\n"));
-	filename = git_path_squash_msg();
-	fd = open(filename, O_WRONLY | O_CREAT, 0666);
-	if (fd < 0)
-		die_errno(_("Could not write to '%s'"), filename);
 
 	init_revisions(&rev, NULL);
 	rev.ignore_merges = 1;
@@ -371,10 +365,7 @@ static void squash_message(struct commit *commit, struct commit_list *remotehead
 			oid_to_hex(&commit->object.oid));
 		pretty_print_commit(&ctx, commit, &out);
 	}
-	if (write_in_full(fd, out.buf, out.len) != out.len)
-		die_errno(_("Writing SQUASH_MSG"));
-	if (close(fd))
-		die_errno(_("Finishing SQUASH_MSG"));
+	write_file_buf(git_path_squash_msg(), out.buf, out.len);
 	strbuf_release(&out);
 }
 
@@ -756,18 +747,6 @@ static void add_strategies(const char *string, unsigned attr)
 
 }
 
-static void write_merge_msg(struct strbuf *msg)
-{
-	const char *filename = git_path_merge_msg();
-	int fd = open(filename, O_WRONLY | O_CREAT, 0666);
-	if (fd < 0)
-		die_errno(_("Could not open '%s' for writing"),
-			  filename);
-	if (write_in_full(fd, msg->buf, msg->len) != msg->len)
-		die_errno(_("Could not write to '%s'"), filename);
-	close(fd);
-}
-
 static void read_merge_msg(struct strbuf *msg)
 {
 	const char *filename = git_path_merge_msg();
@@ -801,7 +780,7 @@ static void prepare_to_commit(struct commit_list *remoteheads)
 	strbuf_addch(&msg, '\n');
 	if (0 < option_edit)
 		strbuf_commented_addf(&msg, _(merge_editor_comment), comment_line_char);
-	write_merge_msg(&msg);
+	write_file_buf(git_path_merge_msg(), msg.buf, msg.len);
 	if (run_commit_hook(0 < option_edit, get_index_file(), "prepare-commit-msg",
 			    git_path_merge_msg(), "merge", NULL))
 		abort_commit(remoteheads, NULL);
@@ -964,8 +943,6 @@ static int setup_with_upstream(const char ***argv)
 
 static void write_merge_state(struct commit_list *remoteheads)
 {
-	const char *filename;
-	int fd;
 	struct commit_list *j;
 	struct strbuf buf = STRBUF_INIT;
 
@@ -979,26 +956,14 @@ static void write_merge_state(struct commit_list *remoteheads)
 		}
 		strbuf_addf(&buf, "%s\n", oid_to_hex(oid));
 	}
-	filename = git_path_merge_head();
-	fd = open(filename, O_WRONLY | O_CREAT, 0666);
-	if (fd < 0)
-		die_errno(_("Could not open '%s' for writing"), filename);
-	if (write_in_full(fd, buf.buf, buf.len) != buf.len)
-		die_errno(_("Could not write to '%s'"), filename);
-	close(fd);
+	write_file_buf(git_path_merge_head(), buf.buf, buf.len);
 	strbuf_addch(&merge_msg, '\n');
-	write_merge_msg(&merge_msg);
+	write_file_buf(git_path_merge_msg(), merge_msg.buf, merge_msg.len);
 
-	filename = git_path_merge_mode();
-	fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
-	if (fd < 0)
-		die_errno(_("Could not open '%s' for writing"), filename);
 	strbuf_reset(&buf);
 	if (fast_forward == FF_NO)
 		strbuf_addf(&buf, "no-ff");
-	if (write_in_full(fd, buf.buf, buf.len) != buf.len)
-		die_errno(_("Could not write to '%s'"), filename);
-	close(fd);
+	write_file_buf(git_path_merge_mode(), buf.buf, buf.len);
 }
 
 static int default_edit_option(void)
-- 
2.9.0.393.g704e522
Previous: Jeff KingNext: Jeff King
Message 20 of 27 in “am: ignore return value of write_file()”
  1. am: ignore return value of write_file()René Scharfe, Jul 7, 2016
  2. Jeff KingJul 7, 2016
  3. Johannes SchindelinJul 8, 2016
  4. Jeff KingJul 8, 2016
  5. 0/8 write_file cleanupsJeff King, Jul 8, 2016
  6. 1/8 config: fix bogus fd check when setting up default configJeff King, Jul 8, 2016
  7. 2/8 am: ignore return value of write_file()Jeff King, Jul 8, 2016
  8. 3/8 branch: use non-gentle write_file for branch descriptionJeff King, Jul 8, 2016
  9. 4/8 write_file: drop "gently" formJeff King, Jul 8, 2016
  10. 5/8 write_file: use xopenJeff King, Jul 8, 2016
  11. 6/8 write_file: add pointer+len variantJeff King, Jul 8, 2016
  12. 7/8 write_file: add format attributeJeff King, Jul 8, 2016
  13. Jeff KingJul 8, 2016
  14. 1/2 walker: let walker_say take arbitrary formatsJeff King, Jul 8, 2016
  15. 2/2 avoid using sha1_to_hex output as printf formatJeff King, Jul 8, 2016
  16. Jeff KingJul 8, 2016
  17. Junio C HamanoJul 8, 2016
  18. Junio C HamanoJul 8, 2016
  19. Jeff KingJul 8, 2016
  20. 8/8 use write_file_buf where applicableJeff King, Jul 8, 2016
  21. 9/8 branch: use write_file_buf instead of write_fileJeff King, Jul 8, 2016
  22. René ScharfeJul 8, 2016
  23. Johannes SchindelinJul 9, 2016
  24. Johannes SchindelinJul 10, 2016
  25. Johannes SchindelinJul 8, 2016
  26. René ScharfeJul 8, 2016
  27. Jeff KingJul 8, 2016

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