From e9dcc3054fb0fdf0faafd0ef57a238f4a692fb23 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Nguy=E1=BB=85n=20Th=C3=A1i=20Ng=E1=BB=8Dc=20Duy?= Date: Sun, 26 Mar 2017 09:42:20 +0700 Subject: [PATCH] files-backend: convert git_path() to strbuf_git_path() MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit git_path() and friends are going to be killed in files-backend.c in near future. And because there's a risk with overwriting buffer in git_path(), let's convert them all to strbuf_git_path(). We'll have easier time killing/converting strbuf_git_path() then because we won't have to worry about memory management again. Signed-off-by: Nguyễn Thái Ngọc Duy Signed-off-by: Junio C Hamano --- refs/files-backend.c | 130 ++++++++++++++++++++++++++++++++----------- 1 file changed, 97 insertions(+), 33 deletions(-) diff --git a/refs/files-backend.c b/refs/files-backend.c index 6d0fcc88f9..5f9b0ab9bc 100644 --- a/refs/files-backend.c +++ b/refs/files-backend.c @@ -2316,6 +2316,7 @@ enum { static void try_remove_empty_parents(const char *refname, unsigned int flags) { struct strbuf buf = STRBUF_INIT; + struct strbuf sb = STRBUF_INIT; char *p, *q; int i; @@ -2337,14 +2338,19 @@ static void try_remove_empty_parents(const char *refname, unsigned int flags) if (q == p) break; strbuf_setlen(&buf, q - buf.buf); - if ((flags & REMOVE_EMPTY_PARENTS_REF) && - rmdir(git_path("%s", buf.buf))) + + strbuf_reset(&sb); + strbuf_git_path(&sb, "%s", buf.buf); + if ((flags & REMOVE_EMPTY_PARENTS_REF) && rmdir(sb.buf)) flags &= ~REMOVE_EMPTY_PARENTS_REF; - if ((flags & REMOVE_EMPTY_PARENTS_REFLOG) && - rmdir(git_path("logs/%s", buf.buf))) + + strbuf_reset(&sb); + strbuf_git_path(&sb, "logs/%s", buf.buf); + if ((flags & REMOVE_EMPTY_PARENTS_REFLOG) && rmdir(sb.buf)) flags &= ~REMOVE_EMPTY_PARENTS_REFLOG; } strbuf_release(&buf); + strbuf_release(&sb); } /* make sure nobody touched the ref, and unlink */ @@ -2506,11 +2512,16 @@ out: */ #define TMP_RENAMED_LOG "logs/refs/.tmp-renamed-log" -static int rename_tmp_log_callback(const char *path, void *cb) +struct rename_cb { + const char *tmp_renamed_log; + int true_errno; +}; + +static int rename_tmp_log_callback(const char *path, void *cb_data) { - int *true_errno = cb; + struct rename_cb *cb = cb_data; - if (rename(git_path(TMP_RENAMED_LOG), path)) { + if (rename(cb->tmp_renamed_log, path)) { /* * rename(a, b) when b is an existing directory ought * to result in ISDIR, but Solaris 5.8 gives ENOTDIR. @@ -2518,7 +2529,7 @@ static int rename_tmp_log_callback(const char *path, void *cb) * but report EISDIR to raceproof_create_file() so * that it knows to retry. */ - *true_errno = errno; + cb->true_errno = errno; if (errno == ENOTDIR) errno = EISDIR; return -1; @@ -2529,20 +2540,26 @@ static int rename_tmp_log_callback(const char *path, void *cb) static int rename_tmp_log(const char *newrefname) { - char *path = git_pathdup("logs/%s", newrefname); - int ret, true_errno; + struct strbuf path = STRBUF_INIT; + struct strbuf tmp = STRBUF_INIT; + struct rename_cb cb; + int ret; - ret = raceproof_create_file(path, rename_tmp_log_callback, &true_errno); + strbuf_git_path(&path, "logs/%s", newrefname); + strbuf_git_path(&tmp, TMP_RENAMED_LOG); + cb.tmp_renamed_log = tmp.buf; + ret = raceproof_create_file(path.buf, rename_tmp_log_callback, &cb); if (ret) { if (errno == EISDIR) - error("directory not empty: %s", path); + error("directory not empty: %s", path.buf); else error("unable to move logfile %s to %s: %s", - git_path(TMP_RENAMED_LOG), path, - strerror(true_errno)); + tmp.buf, path.buf, + strerror(cb.true_errno)); } - free(path); + strbuf_release(&path); + strbuf_release(&tmp); return ret; } @@ -2583,10 +2600,17 @@ static int files_rename_ref(struct ref_store *ref_store, int flag = 0, logmoved = 0; struct ref_lock *lock; struct stat loginfo; - int log = !lstat(git_path("logs/%s", oldrefname), &loginfo); + struct strbuf sb_oldref = STRBUF_INIT; + struct strbuf sb_newref = STRBUF_INIT; + struct strbuf tmp_renamed_log = STRBUF_INIT; + int log, ret; struct strbuf err = STRBUF_INIT; - int ret; + strbuf_git_path(&sb_oldref, "logs/%s", oldrefname); + strbuf_git_path(&sb_newref, "logs/%s", newrefname); + strbuf_git_path(&tmp_renamed_log, TMP_RENAMED_LOG); + + log = !lstat(sb_oldref.buf, &loginfo); if (log && S_ISLNK(loginfo.st_mode)) { ret = error("reflog for %s is a symlink", oldrefname); goto out; @@ -2608,7 +2632,7 @@ static int files_rename_ref(struct ref_store *ref_store, goto out; } - if (log && rename(git_path("logs/%s", oldrefname), git_path(TMP_RENAMED_LOG))) { + if (log && rename(sb_oldref.buf, tmp_renamed_log.buf)) { ret = error("unable to move logfile logs/%s to "TMP_RENAMED_LOG": %s", oldrefname, strerror(errno)); goto out; @@ -2690,16 +2714,19 @@ static int files_rename_ref(struct ref_store *ref_store, log_all_ref_updates = flag; rollbacklog: - if (logmoved && rename(git_path("logs/%s", newrefname), git_path("logs/%s", oldrefname))) + if (logmoved && rename(sb_newref.buf, sb_oldref.buf)) error("unable to restore logfile %s from %s: %s", oldrefname, newrefname, strerror(errno)); if (!logmoved && log && - rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", oldrefname))) + rename(tmp_renamed_log.buf, sb_oldref.buf)) error("unable to restore logfile %s from "TMP_RENAMED_LOG": %s", oldrefname, strerror(errno)); - ret = 1; out: + strbuf_release(&sb_newref); + strbuf_release(&sb_oldref); + strbuf_release(&tmp_renamed_log); + return ret; } @@ -2872,18 +2899,24 @@ static int files_log_ref_write(const char *refname, const unsigned char *old_sha result = log_ref_write_fd(logfd, old_sha1, new_sha1, git_committer_info(0), msg); if (result) { + struct strbuf sb = STRBUF_INIT; int save_errno = errno; + strbuf_git_path(&sb, "logs/%s", refname); strbuf_addf(err, "unable to append to '%s': %s", - git_path("logs/%s", refname), strerror(save_errno)); + sb.buf, strerror(save_errno)); + strbuf_release(&sb); close(logfd); return -1; } if (close(logfd)) { + struct strbuf sb = STRBUF_INIT; int save_errno = errno; + strbuf_git_path(&sb, "logs/%s", refname); strbuf_addf(err, "unable to append to '%s': %s", - git_path("logs/%s", refname), strerror(save_errno)); + sb.buf, strerror(save_errno)); + strbuf_release(&sb); return -1; } return 0; @@ -3103,22 +3136,32 @@ int set_worktree_head_symref(const char *gitdir, const char *target, const char static int files_reflog_exists(struct ref_store *ref_store, const char *refname) { + struct strbuf sb = STRBUF_INIT; struct stat st; + int ret; /* Check validity (but we don't need the result): */ files_downcast(ref_store, 0, "reflog_exists"); - return !lstat(git_path("logs/%s", refname), &st) && - S_ISREG(st.st_mode); + strbuf_git_path(&sb, "logs/%s", refname); + ret = !lstat(sb.buf, &st) && S_ISREG(st.st_mode); + strbuf_release(&sb); + return ret; } static int files_delete_reflog(struct ref_store *ref_store, const char *refname) { + struct strbuf sb = STRBUF_INIT; + int ret; + /* Check validity (but we don't need the result): */ files_downcast(ref_store, 0, "delete_reflog"); - return remove_path(git_path("logs/%s", refname)); + strbuf_git_path(&sb, "logs/%s", refname); + ret = remove_path(sb.buf); + strbuf_release(&sb); + return ret; } static int show_one_reflog_ent(struct strbuf *sb, each_reflog_ent_fn fn, void *cb_data) @@ -3174,7 +3217,9 @@ static int files_for_each_reflog_ent_reverse(struct ref_store *ref_store, /* Check validity (but we don't need the result): */ files_downcast(ref_store, 0, "for_each_reflog_ent_reverse"); - logfp = fopen(git_path("logs/%s", refname), "r"); + strbuf_git_path(&sb, "logs/%s", refname); + logfp = fopen(sb.buf, "r"); + strbuf_release(&sb); if (!logfp) return -1; @@ -3280,7 +3325,9 @@ static int files_for_each_reflog_ent(struct ref_store *ref_store, /* Check validity (but we don't need the result): */ files_downcast(ref_store, 0, "for_each_reflog_ent"); - logfp = fopen(git_path("logs/%s", refname), "r"); + strbuf_git_path(&sb, "logs/%s", refname); + logfp = fopen(sb.buf, "r"); + strbuf_release(&sb); if (!logfp) return -1; @@ -3362,12 +3409,15 @@ static struct ref_iterator *files_reflog_iterator_begin(struct ref_store *ref_st { struct files_reflog_iterator *iter = xcalloc(1, sizeof(*iter)); struct ref_iterator *ref_iterator = &iter->base; + struct strbuf sb = STRBUF_INIT; /* Check validity (but we don't need the result): */ files_downcast(ref_store, 0, "reflog_iterator_begin"); base_ref_iterator_init(ref_iterator, &files_reflog_iterator_vtable); - iter->dir_iterator = dir_iterator_begin(git_path("logs")); + strbuf_git_path(&sb, "logs"); + iter->dir_iterator = dir_iterator_begin(sb.buf); + strbuf_release(&sb); return ref_iterator; } @@ -3705,6 +3755,7 @@ static int files_transaction_commit(struct ref_store *ref_store, char *head_ref = NULL; int head_type; struct object_id head_oid; + struct strbuf sb = STRBUF_INIT; assert(err); @@ -3826,7 +3877,9 @@ static int files_transaction_commit(struct ref_store *ref_store, if (!(update->type & REF_ISPACKED) || update->type & REF_ISSYMREF) { /* It is a loose reference. */ - if (unlink_or_msg(git_path("%s", lock->ref_name), err)) { + strbuf_reset(&sb); + strbuf_git_path(&sb, "%s", lock->ref_name); + if (unlink_or_msg(sb.buf, err)) { ret = TRANSACTION_GENERIC_ERROR; goto cleanup; } @@ -3846,7 +3899,9 @@ static int files_transaction_commit(struct ref_store *ref_store, /* Delete the reflogs of any references that were deleted: */ for_each_string_list_item(ref_to_delete, &refs_to_delete) { - if (!unlink_or_warn(git_path("logs/%s", ref_to_delete->string))) + strbuf_reset(&sb); + strbuf_git_path(&sb, "logs/%s", ref_to_delete->string); + if (!unlink_or_warn(sb.buf)) try_remove_empty_parents(ref_to_delete->string, REMOVE_EMPTY_PARENTS_REFLOG); } @@ -3854,6 +3909,7 @@ static int files_transaction_commit(struct ref_store *ref_store, clear_loose_ref_cache(refs); cleanup: + strbuf_release(&sb); transaction->state = REF_TRANSACTION_CLOSED; for (i = 0; i < transaction->nr; i++) { @@ -4120,14 +4176,22 @@ static int files_reflog_expire(struct ref_store *ref_store, static int files_init_db(struct ref_store *ref_store, struct strbuf *err) { + struct strbuf sb = STRBUF_INIT; + /* Check validity (but we don't need the result): */ files_downcast(ref_store, 0, "init_db"); /* * Create .git/refs/{heads,tags} */ - safe_create_dir(git_path("refs/heads"), 1); - safe_create_dir(git_path("refs/tags"), 1); + strbuf_git_path(&sb, "refs/heads"); + safe_create_dir(sb.buf, 1); + + strbuf_reset(&sb); + strbuf_git_path(&sb, "refs/tags"); + safe_create_dir(sb.buf, 1); + + strbuf_release(&sb); return 0; } -- 2.43.2