From 33ffc176d65e1e98e1eea262dc7827830c33c56d Mon Sep 17 00:00:00 2001 From: Michael Haggerty Date: Sat, 23 May 2015 01:34:55 +0200 Subject: verify_lock(): report errors via a strbuf Instead of writing error messages directly to stderr, write them to a "strbuf *err". The caller, lock_ref_sha1_basic(), uses this error reporting convention with all the other callees, and reports its error this way to its callers. Signed-off-by: Michael Haggerty Signed-off-by: Junio C Hamano --- refs.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/refs.c b/refs.c index af49e5cbaa..3a73cf2f16 100644 --- a/refs.c +++ b/refs.c @@ -2221,23 +2221,28 @@ static void unlock_ref(struct ref_lock *lock) /* * Verify that the reference locked by lock has the value old_sha1. * Fail if the reference doesn't exist and mustexist is set. Return 0 - * on success or a negative value on error. This function should make - * sure errno is meaningful on error. + * on success. On error, write an error message to err, set errno, and + * return a negative value. */ static int verify_lock(struct ref_lock *lock, - const unsigned char *old_sha1, int mustexist) + const unsigned char *old_sha1, int mustexist, + struct strbuf *err) { + assert(err); + if (read_ref_full(lock->ref_name, mustexist ? RESOLVE_REF_READING : 0, lock->old_sha1, NULL)) { int save_errno = errno; - error("Can't verify ref %s", lock->ref_name); + strbuf_addf(err, "Can't verify ref %s", lock->ref_name); errno = save_errno; return -1; } if (hashcmp(lock->old_sha1, old_sha1)) { - error("Ref %s is at %s but expected %s", lock->ref_name, - sha1_to_hex(lock->old_sha1), sha1_to_hex(old_sha1)); + strbuf_addf(err, "Ref %s is at %s but expected %s", + lock->ref_name, + sha1_to_hex(lock->old_sha1), + sha1_to_hex(old_sha1)); errno = EBUSY; return -1; } @@ -2469,7 +2474,7 @@ static struct ref_lock *lock_ref_sha1_basic(const char *refname, goto error_return; } } - if (old_sha1 && verify_lock(lock, old_sha1, mustexist)) { + if (old_sha1 && verify_lock(lock, old_sha1, mustexist, err)) { last_errno = errno; goto error_return; } -- cgit v1.2.3