Because git_path() calls vsnprintf(), code like
fd = open(git_path("SQUASH_MSG"), O_WRONLY | O_CREAT, 0666);
die_errno(_("Could not write to '%s'"), git_path("SQUASH_MSG"));
can end up printing an error indicator from vsnprintf() instead of
open() by mistake. Store the path we are trying to write to in a
temporary variable and pass _that_ to die_errno(), so the messages
written by git cherry-pick/revert and git merge can avoid this source
of confusion.
Signed-off-by: Jonathan Nieder <jrnieder@xxxxxxxxx>
---
builtin/merge.c | 49 +++++++++++++++++++++++++++++--------------------
builtin/revert.c | 9 +++++----
2 files changed, 34 insertions(+), 24 deletions(-)
diff --git a/builtin/merge.c b/builtin/merge.c
index dffd5ec1..2870a6af 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -316,13 +316,15 @@ static void squash_message(struct commit *commit)
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"));
- fd = open(git_path("SQUASH_MSG"), O_WRONLY | O_CREAT, 0666);
+ filename = git_path("SQUASH_MSG");
+ fd = open(filename, O_WRONLY | O_CREAT, 0666);
if (fd < 0)
- die_errno(_("Could not write to '%s'"), git_path("SQUASH_MSG"));
+ die_errno(_("Could not write to '%s'"), filename);
init_revisions(&rev, NULL);
rev.ignore_merges = 1;
@@ -492,14 +494,16 @@ static void merge_name(const char *remote, struct strbuf *msg)
if (!strcmp(remote, "FETCH_HEAD") &&
!access(git_path("FETCH_HEAD"), R_OK)) {
+ const char *filename;
FILE *fp;
struct strbuf line = STRBUF_INIT;
char *ptr;
- fp = fopen(git_path("FETCH_HEAD"), "r");
+ filename = git_path("FETCH_HEAD");
+ fp = fopen(filename, "r");
if (!fp)
die_errno(_("could not open '%s' for reading"),
- git_path("FETCH_HEAD"));
+ filename);
strbuf_getline(&line, fp, '\n');
fclose(fp);
ptr = strstr(line.buf, "\tnot-for-merge\t");
@@ -847,20 +851,22 @@ static void add_strategies(const char *string, unsigned attr)
static void write_merge_msg(struct strbuf *msg)
{
- int fd = open(git_path("MERGE_MSG"), O_WRONLY | O_CREAT, 0666);
+ 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"),
- git_path("MERGE_MSG"));
+ filename);
if (write_in_full(fd, msg->buf, msg->len) != msg->len)
- die_errno(_("Could not write to '%s'"), git_path("MERGE_MSG"));
+ 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");
strbuf_reset(msg);
- if (strbuf_read_file(msg, git_path("MERGE_MSG"), 0) < 0)
- die_errno(_("Could not read from '%s'"), git_path("MERGE_MSG"));
+ if (strbuf_read_file(msg, filename, 0) < 0)
+ die_errno(_("Could not read from '%s'"), filename);
}
static void write_merge_state(void);
@@ -948,13 +954,14 @@ static int finish_automerge(struct commit *head,
static int suggest_conflicts(int renormalizing)
{
+ const char *filename;
FILE *fp;
int pos;
- fp = fopen(git_path("MERGE_MSG"), "a");
+ filename = git_path("MERGE_MSG");
+ fp = fopen(filename, "a");
if (!fp)
- die_errno(_("Could not open '%s' for writing"),
- git_path("MERGE_MSG"));
+ die_errno(_("Could not open '%s' for writing"), filename);
fprintf(fp, "\nConflicts:\n");
for (pos = 0; pos < active_nr; pos++) {
struct cache_entry *ce = active_cache[pos];
@@ -1046,6 +1053,7 @@ static int setup_with_upstream(const char ***argv)
static void write_merge_state(void)
{
+ const char *filename;
int fd;
struct commit_list *j;
struct strbuf buf = STRBUF_INIT;
@@ -1053,24 +1061,25 @@ static void write_merge_state(void)
for (j = remoteheads; j; j = j->next)
strbuf_addf(&buf, "%s\n",
sha1_to_hex(j->item->object.sha1));
- fd = open(git_path("MERGE_HEAD"), O_WRONLY | O_CREAT, 0666);
+ filename = git_path("MERGE_HEAD");
+ fd = open(filename, O_WRONLY | O_CREAT, 0666);
if (fd < 0)
- die_errno(_("Could not open '%s' for writing"),
- git_path("MERGE_HEAD"));
+ 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'"), git_path("MERGE_HEAD"));
+ die_errno(_("Could not write to '%s'"), filename);
close(fd);
strbuf_addch(&merge_msg, '\n');
write_merge_msg(&merge_msg);
- fd = open(git_path("MERGE_MODE"), O_WRONLY | O_CREAT | O_TRUNC, 0666);
+
+ 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"),
- git_path("MERGE_MODE"));
+ die_errno(_("Could not open '%s' for writing"), filename);
strbuf_reset(&buf);
if (!allow_fast_forward)
strbuf_addf(&buf, "no-ff");
if (write_in_full(fd, buf.buf, buf.len) != buf.len)
- die_errno(_("Could not write to '%s'"), git_path("MERGE_MODE"));
+ die_errno(_("Could not write to '%s'"), filename);
close(fd);
}
diff --git a/builtin/revert.c b/builtin/revert.c
index 87df70ed..985f95b0 100644
--- a/builtin/revert.c
+++ b/builtin/revert.c
@@ -288,17 +288,18 @@ static char *get_encoding(const char *message)
static void write_cherry_pick_head(struct commit *commit)
{
+ const char *filename;
int fd;
struct strbuf buf = STRBUF_INIT;
strbuf_addf(&buf, "%s\n", sha1_to_hex(commit->object.sha1));
- fd = open(git_path("CHERRY_PICK_HEAD"), O_WRONLY | O_CREAT, 0666);
+ filename = git_path("CHERRY_PICK_HEAD");
+ fd = open(filename, O_WRONLY | O_CREAT, 0666);
if (fd < 0)
- die_errno(_("Could not open '%s' for writing"),
- git_path("CHERRY_PICK_HEAD"));
+ die_errno(_("Could not open '%s' for writing"), filename);
if (write_in_full(fd, buf.buf, buf.len) != buf.len || close(fd))
- die_errno(_("Could not write to '%s'"), git_path("CHERRY_PICK_HEAD"));
+ die_errno(_("Could not write to '%s'"), filename);
strbuf_release(&buf);
}
--
1.7.8.rc0
--
To unsubscribe from this list: send the line "unsubscribe git" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html