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author | Ronnie Sahlberg <sahlberg@google.com> | 2014-06-20 07:42:51 -0700 |
---|---|---|
committer | Junio C Hamano <gitster@pobox.com> | 2014-07-14 11:54:41 -0700 |
commit | 835e3c992fd453d172466be29283b55a792cac76 (patch) | |
tree | df0f27afd2571eff1ad12591d000834f80c333eb | |
parent | bd3b02daec241651231f63b3fd8ee2a8ea1dac68 (diff) | |
download | git-835e3c992fd453d172466be29283b55a792cac76.tar.gz git-835e3c992fd453d172466be29283b55a792cac76.tar.xz |
refs.c: verify_lock should set errno to something meaningful
Making errno when returning from verify_lock() meaningful, which
should almost but not completely fix
* a bug in "git fetch"'s s_update_ref, which trusts the result of an
errno == ENOTDIR check to detect D/F conflicts
ENOTDIR makes sense as a sign that a file was in the way of a
directory we wanted to create. Should "git fetch" also look for
ENOTEMPTY or EEXIST to catch cases where a directory was in the way
of a file to be created?
Signed-off-by: Ronnie Sahlberg <sahlberg@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Acked-by: Michael Haggerty <mhagger@alum.mit.edu>
-rw-r--r-- | refs.c | 4 | ||||
-rw-r--r-- | refs.h | 6 |
2 files changed, 9 insertions, 1 deletions
@@ -1932,18 +1932,22 @@ int refname_match(const char *abbrev_name, const char *full_name) return 0; } +/* This function should make sure errno is meaningful on error */ static struct ref_lock *verify_lock(struct ref_lock *lock, const unsigned char *old_sha1, int mustexist) { if (read_ref_full(lock->ref_name, lock->old_sha1, mustexist, NULL)) { + int save_errno = errno; error("Can't verify ref %s", lock->ref_name); unlock_ref(lock); + errno = save_errno; return NULL; } 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)); unlock_ref(lock); + errno = EBUSY; return NULL; } return lock; @@ -137,11 +137,15 @@ extern int ref_exists(const char *); */ extern int peel_ref(const char *refname, unsigned char *sha1); -/** Locks a "refs/" ref returning the lock on success and NULL on failure. **/ +/* + * Locks a "refs/" ref returning the lock on success and NULL on failure. + * On failure errno is set to something meaningful. + */ extern struct ref_lock *lock_ref_sha1(const char *refname, const unsigned char *old_sha1); /** Locks any ref (for 'HEAD' type refs). */ #define REF_NODEREF 0x01 +/* errno is set to something meaningful on failure */ extern struct ref_lock *lock_any_ref_for_update(const char *refname, const unsigned char *old_sha1, int flags, int *type_p); |