v5 * address Ævar's comment; punt on clearing errno. Han-Wen Nienhuys (6): refs: remove EINVAL errno output from specification of read_raw_ref_fn refs/files-backend: stop setting errno from lock_ref_oid_basic refs: make errno output explicit for read_raw_ref_fn refs: add failure_errno to refs_read_raw_ref() signature refs: explicitly return failure_errno from parse_loose_ref_contents refs: make errno output explicit for refs_resolve_ref_unsafe refs.c | 58 ++++++++++++++++++++++----------- refs/debug.c | 4 +-- refs/files-backend.c | 74 ++++++++++++++++++++++--------------------- refs/packed-backend.c | 15 +++++---- refs/refs-internal.h | 40 +++++++++++++++-------- 5 files changed, 115 insertions(+), 76 deletions(-) base-commit: 670b81a890388c60b7032a4f5b879f2ece8c4558 Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-1012%2Fhanwen%2Feinval-sideband-v5 Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-1012/hanwen/einval-sideband-v5 Pull-Request: https://github.com/git/git/pull/1012 Range-diff vs v4: 1: d6a41c3c0cb = 1: d6a41c3c0cb refs: remove EINVAL errno output from specification of read_raw_ref_fn 2: ff7ea6efcba ! 2: 95025080c16 refs/files-backend: stop setting errno from lock_ref_oid_basic @@ Commit message documented to use and/or preserve errno) Signed-off-by: Han-Wen Nienhuys <hanwen@xxxxxxxxxx> - Reviewed-By: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx> + Reviewed-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx> ## refs/files-backend.c ## @@ refs/files-backend.c: static int create_reflock(const char *path, void *cb) 3: ff5696b0875 ! 3: 7feedb97201 refs: make errno output explicit for read_raw_ref_fn @@ Commit message relevant. Signed-off-by: Han-Wen Nienhuys <hanwen@xxxxxxxxxx> - Reviewed-By: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx> + Reviewed-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx> ## refs.c ## @@ refs.c: int refs_read_raw_ref(struct ref_store *ref_store, 4: 9c933706cb0 ! 4: ef91f5cee13 refs: add failure_errno to refs_read_raw_ref() signature @@ Commit message This lets us use the explicit errno output parameter in refs_resolve_ref_unsafe. Signed-off-by: Han-Wen Nienhuys <hanwen@xxxxxxxxxx> - Reviewed-By: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx> + Reviewed-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx> ## refs.c ## @@ refs.c: done: @@ refs.c: done: -int refs_read_raw_ref(struct ref_store *ref_store, - const char *refname, struct object_id *oid, - struct strbuf *referent, unsigned int *type) +-{ +- int result; +- int failure_errno; +int refs_read_raw_ref(struct ref_store *ref_store, const char *refname, + struct object_id *oid, struct strbuf *referent, + unsigned int *type, int *failure_errno) - { -- int result; -- int failure_errno; -+ int ignore; -+ if (failure_errno) -+ *failure_errno = 0; -+ else -+ failure_errno = &ignore; -+ ++{ ++ int unused_errno; ++ if (!failure_errno) ++ failure_errno = &unused_errno; ++ *failure_errno = 0; if (!strcmp(refname, "FETCH_HEAD") || !strcmp(refname, "MERGE_HEAD")) { return refs_read_special_head(ref_store, refname, oid, referent, type); 5: ab147afb38d ! 5: 6918c214d1b refs: explicitly return failure_errno from parse_loose_ref_contents @@ Commit message to create a custom error message. Signed-off-by: Han-Wen Nienhuys <hanwen@xxxxxxxxxx> - Reviewed-By: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx> + Reviewed-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx> ## refs.c ## @@ refs.c: int for_each_fullref_in_prefixes(const char *namespace, @@ refs.c: static int refs_read_special_head(struct ref_store *ref_store, done: strbuf_release(&full_path); @@ refs.c: int refs_read_raw_ref(struct ref_store *ref_store, const char *refname, - + *failure_errno = 0; if (!strcmp(refname, "FETCH_HEAD") || !strcmp(refname, "MERGE_HEAD")) { return refs_read_special_head(ref_store, refname, oid, referent, - type); @@ refs/files-backend.c: stat_ref: + ret = parse_loose_ref_contents(buf, oid, referent, type, failure_errno); + errno = *failure_errno; out: -+ /* Collect all types of failures from errno. Many system calls in this -+ * function can fail with ENOTDIR/EISDIR, and we want to collect all of -+ * them. ++ /* ++ * Many system calls in this function can fail with ENOTDIR/EISDIR, and ++ * we want to collect all of them, so simply copy the error out from ++ * errno. + */ *failure_errno = errno; strbuf_release(&sb_path); 6: 0526a41b4b3 ! 6: 85a14bde904 refs: make errno output explicit for refs_resolve_ref_unsafe @@ Commit message that needs error information to make logic decisions, so update that caller Signed-off-by: Han-Wen Nienhuys <hanwen@xxxxxxxxxx> - Reviewed-By: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx> + Reviewed-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx> ## refs/files-backend.c ## @@ refs/files-backend.c: static struct ref_lock *lock_ref_oid_basic(struct files_ref_store *refs, -- gitgitgadget
