From: Ronnie Sahlberg <sahlberg@xxxxxxxxxx>
Break out the code to create the string and writing it to the file
descriptor from log_ref_write and add it into a dedicated function
log_ref_write_fd. For now this is only used from log_ref_write,
but later on we will call this function from reflog transactions too,
which means that we will end up with only a single place,
where we write a reflog entry to a file instead of the current two
places (log_ref_write and builtin/reflog.c).
[sb: replaced sprintf by snprintf for security reasons,
which was there in the beginning (6de08ae688b9f2, 2006-06-17,
Log ref updates to logs/refs/<ref>), but got lost in (8ac65937d032ad,
2007-01-26, Make sure we do not write bogus reflog entries.)
]
Signed-off-by: Ronnie Sahlberg <sahlberg@xxxxxxxxxx>
Signed-off-by: Jonathan Nieder <jrnieder@xxxxxxxxx>
Signed-off-by: Stefan Beller <sbeller@xxxxxxxxxx>
---
refs.c | 48 ++++++++++++++++++++++++++++++------------------
1 file changed, 30 insertions(+), 18 deletions(-)
This is also part of the ref-transaction-reflog series, but is
sufficiently independant, that I'd argue it's a general code hygiene thing,
we can use in any case.
Applies on master.
Compared to the last send of this patch[1], there was one change in the print
function. Replaced sprintf by snprintf for security reasons.
[1] part of the ref-transaction-reflog series
http://permalink.gmane.org/gmane.comp.version-control.git/259714
diff --git a/refs.c b/refs.c
index 5ff457e..f9b42e5 100644
--- a/refs.c
+++ b/refs.c
@@ -2990,15 +2990,37 @@ int log_ref_setup(const char *refname, char *logfile, int bufsize)
return 0;
}
+static int log_ref_write_fd(int fd, const unsigned char *old_sha1,
+ const unsigned char *new_sha1,
+ const char *committer, const char *msg)
+{
+ int msglen, written;
+ unsigned maxlen, len;
+ char *logrec;
+
+ msglen = msg ? strlen(msg) : 0;
+ maxlen = strlen(committer) + msglen + 100;
+ logrec = xmalloc(maxlen);
+ len = snprintf(logrec, maxlen, "%s %s %s\n",
+ sha1_to_hex(old_sha1),
+ sha1_to_hex(new_sha1),
+ committer);
+ if (msglen)
+ len += copy_msg(logrec + len - 1, msg) - 1;
+
+ written = len <= maxlen ? write_in_full(fd, logrec, len) : -1;
+ free(logrec);
+ if (written != len)
+ return -1;
+
+ return 0;
+}
+
static int log_ref_write(const char *refname, const unsigned char *old_sha1,
const unsigned char *new_sha1, const char *msg)
{
- int logfd, result, written, oflags = O_APPEND | O_WRONLY;
- unsigned maxlen, len;
- int msglen;
+ int logfd, result, oflags = O_APPEND | O_WRONLY;
char log_file[PATH_MAX];
- char *logrec;
- const char *committer;
if (log_all_ref_updates < 0)
log_all_ref_updates = !is_bare_repository();
@@ -3010,19 +3032,9 @@ static int log_ref_write(const char *refname, const unsigned char *old_sha1,
logfd = open(log_file, oflags);
if (logfd < 0)
return 0;
- msglen = msg ? strlen(msg) : 0;
- committer = git_committer_info(0);
- maxlen = strlen(committer) + msglen + 100;
- logrec = xmalloc(maxlen);
- len = sprintf(logrec, "%s %s %s\n",
- sha1_to_hex(old_sha1),
- sha1_to_hex(new_sha1),
- committer);
- if (msglen)
- len += copy_msg(logrec + len - 1, msg) - 1;
- written = len <= maxlen ? write_in_full(logfd, logrec, len) : -1;
- free(logrec);
- if (written != len) {
+ result = log_ref_write_fd(logfd, old_sha1, new_sha1,
+ git_committer_info(0), msg);
+ if (result) {
int save_errno = errno;
close(logfd);
error("Unable to append to %s", log_file);
--
2.2.0.rc2.13.g0786cdb
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