Merge branch 'jk/snprintf-cleanups'
authorJunio C Hamano <gitster@pobox.com>
Mon, 17 Apr 2017 06:29:26 +0000 (23:29 -0700)
committerJunio C Hamano <gitster@pobox.com>
Mon, 17 Apr 2017 06:29:26 +0000 (23:29 -0700)
Code clean-up.

* jk/snprintf-cleanups:
daemon: use an argv_array to exec children
gc: replace local buffer with git_path
transport-helper: replace checked snprintf with xsnprintf
convert unchecked snprintf into xsnprintf
combine-diff: replace malloc/snprintf with xstrfmt
replace unchecked snprintf calls with heap buffers
receive-pack: print --pack-header directly into argv array
name-rev: replace static buffer with strbuf
create_branch: use xstrfmt for reflog message
create_branch: move msg setup closer to point of use
avoid using mksnpath for refs
avoid using fixed PATH_MAX buffers for refs
fetch: use heap buffer to format reflog
tag: use strbuf to format tag header
diff: avoid fixed-size buffer for patch-ids
odb_mkstemp: use git_path_buf
odb_mkstemp: write filename into strbuf
do not check odb_mkstemp return value for errors

28 files changed:
bisect.c
branch.c
builtin/checkout.c
builtin/fetch.c
builtin/gc.c
builtin/index-pack.c
builtin/ls-remote.c
builtin/name-rev.c
builtin/notes.c
builtin/receive-pack.c
builtin/replace.c
builtin/rev-parse.c
builtin/tag.c
cache.h
combine-diff.c
daemon.c
diff.c
environment.c
fast-import.c
grep.c
http.c
imap-send.c
pack-bitmap-write.c
pack-write.c
refs.c
sha1_file.c
submodule.c
transport-helper.c
index 30808cadf7613d73cae2e4caaedd922ba9a48ca0..d12583eaac26edb865f22f98f54dc6495b7f994e 100644 (file)
--- a/bisect.c
+++ b/bisect.c
@@ -200,6 +200,7 @@ static struct commit_list *best_bisection_sorted(struct commit_list *list, int n
 {
        struct commit_list *p;
        struct commit_dist *array = xcalloc(nr, sizeof(*array));
+       struct strbuf buf = STRBUF_INIT;
        int cnt, i;
 
        for (p = list, cnt = 0; p; p = p->next) {
@@ -217,17 +218,18 @@ static struct commit_list *best_bisection_sorted(struct commit_list *list, int n
        }
        QSORT(array, cnt, compare_commit_dist);
        for (p = list, i = 0; i < cnt; i++) {
-               char buf[100]; /* enough for dist=%d */
                struct object *obj = &(array[i].commit->object);
 
-               snprintf(buf, sizeof(buf), "dist=%d", array[i].distance);
-               add_name_decoration(DECORATION_NONE, buf, obj);
+               strbuf_reset(&buf);
+               strbuf_addf(&buf, "dist=%d", array[i].distance);
+               add_name_decoration(DECORATION_NONE, buf.buf, obj);
 
                p->item = array[i].commit;
                p = p->next;
        }
        if (p)
                p->next = NULL;
+       strbuf_release(&buf);
        free(array);
        return list;
 }
index 5c12036b0206fe250f50bea30578785b090f9ee4..ad5a2299ba2600e67c8aaa7719a2c7d54898958f 100644 (file)
--- a/branch.c
+++ b/branch.c
@@ -234,7 +234,7 @@ void create_branch(const char *name, const char *start_name,
 {
        struct commit *commit;
        unsigned char sha1[20];
-       char *real_ref, msg[PATH_MAX + 20];
+       char *real_ref;
        struct strbuf ref = STRBUF_INIT;
        int forcing = 0;
        int dont_change_ref = 0;
@@ -290,19 +290,18 @@ void create_branch(const char *name, const char *start_name,
                die(_("Not a valid branch point: '%s'."), start_name);
        hashcpy(sha1, commit->object.oid.hash);
 
-       if (forcing)
-               snprintf(msg, sizeof msg, "branch: Reset to %s",
-                        start_name);
-       else if (!dont_change_ref)
-               snprintf(msg, sizeof msg, "branch: Created from %s",
-                        start_name);
-
        if (reflog)
                log_all_ref_updates = LOG_REFS_NORMAL;
 
        if (!dont_change_ref) {
                struct ref_transaction *transaction;
                struct strbuf err = STRBUF_INIT;
+               char *msg;
+
+               if (forcing)
+                       msg = xstrfmt("branch: Reset to %s", start_name);
+               else
+                       msg = xstrfmt("branch: Created from %s", start_name);
 
                transaction = ref_transaction_begin(&err);
                if (!transaction ||
@@ -313,6 +312,7 @@ void create_branch(const char *name, const char *start_name,
                        die("%s", err.buf);
                ref_transaction_free(transaction);
                strbuf_release(&err);
+               free(msg);
        }
 
        if (real_ref && track)
index 3ecc47bec07b47f3452b4744f0e7482681e61748..bfa5419f335dc1db98059869de24f152cffb9aa6 100644 (file)
@@ -908,11 +908,10 @@ static int check_tracking_name(struct remote *remote, void *cb_data)
 static const char *unique_tracking_name(const char *name, struct object_id *oid)
 {
        struct tracking_name_data cb_data = { NULL, NULL, NULL, 1 };
-       char src_ref[PATH_MAX];
-       snprintf(src_ref, PATH_MAX, "refs/heads/%s", name);
-       cb_data.src_ref = src_ref;
+       cb_data.src_ref = xstrfmt("refs/heads/%s", name);
        cb_data.dst_oid = oid;
        for_each_remote(check_tracking_name, &cb_data);
+       free(cb_data.src_ref);
        if (cb_data.unique)
                return cb_data.dst_ref;
        free(cb_data.dst_ref);
index b5ad09d0460cc7a51f35a56a4304e6a1fb26d26e..4ef7a08afc79a02dfb49a54065544666d1f6b6da 100644 (file)
@@ -421,7 +421,7 @@ static int s_update_ref(const char *action,
                        struct ref *ref,
                        int check_old)
 {
-       char msg[1024];
+       char *msg;
        char *rla = getenv("GIT_REFLOG_ACTION");
        struct ref_transaction *transaction;
        struct strbuf err = STRBUF_INIT;
@@ -431,7 +431,7 @@ static int s_update_ref(const char *action,
                return 0;
        if (!rla)
                rla = default_rla.buf;
-       snprintf(msg, sizeof(msg), "%s: %s", rla, action);
+       msg = xstrfmt("%s: %s", rla, action);
 
        transaction = ref_transaction_begin(&err);
        if (!transaction ||
@@ -449,11 +449,13 @@ static int s_update_ref(const char *action,
 
        ref_transaction_free(transaction);
        strbuf_release(&err);
+       free(msg);
        return 0;
 fail:
        ref_transaction_free(transaction);
        error("%s", err.buf);
        strbuf_release(&err);
+       free(msg);
        return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
                           : STORE_REF_ERROR_OTHER;
 }
index c2c61a57bb359a37373ffd49aba79e5d5514a9fc..2daede78205bd065f907cb153b7729613fcfd82c 100644 (file)
@@ -135,8 +135,6 @@ static int too_many_loose_objects(void)
         * distributed, we can check only one and get a reasonable
         * estimate.
         */
-       char path[PATH_MAX];
-       const char *objdir = get_object_directory();
        DIR *dir;
        struct dirent *ent;
        int auto_threshold;
@@ -146,11 +144,7 @@ static int too_many_loose_objects(void)
        if (gc_auto_threshold <= 0)
                return 0;
 
-       if (sizeof(path) <= snprintf(path, sizeof(path), "%s/17", objdir)) {
-               warning(_("insanely long object directory %.*s"), 50, objdir);
-               return 0;
-       }
-       dir = opendir(path);
+       dir = opendir(git_path("objects/17"));
        if (!dir)
                return 0;
 
index 88d205f858e93f6d7c8fca17803fc6fadee47750..197c51912d96bd0d5cbe9f34bbc8da3f2d2623c6 100644 (file)
@@ -307,14 +307,15 @@ static const char *open_pack_file(const char *pack_name)
        if (from_stdin) {
                input_fd = 0;
                if (!pack_name) {
-                       static char tmp_file[PATH_MAX];
-                       output_fd = odb_mkstemp(tmp_file, sizeof(tmp_file),
+                       struct strbuf tmp_file = STRBUF_INIT;
+                       output_fd = odb_mkstemp(&tmp_file,
                                                "pack/tmp_pack_XXXXXX");
-                       pack_name = xstrdup(tmp_file);
-               } else
+                       pack_name = strbuf_detach(&tmp_file, NULL);
+               } else {
                        output_fd = open(pack_name, O_CREAT|O_EXCL|O_RDWR, 0600);
-               if (output_fd < 0)
-                       die_errno(_("unable to create '%s'"), pack_name);
+                       if (output_fd < 0)
+                               die_errno(_("unable to create '%s'"), pack_name);
+               }
                nothread_data.pack_fd = output_fd;
        } else {
                input_fd = open(pack_name, O_RDONLY);
@@ -1442,10 +1443,11 @@ static void final(const char *final_pack_name, const char *curr_pack_name,
        if (!from_stdin) {
                printf("%s\n", sha1_to_hex(sha1));
        } else {
-               char buf[48];
-               int len = snprintf(buf, sizeof(buf), "%s\t%s\n",
-                                  report, sha1_to_hex(sha1));
-               write_or_die(1, buf, len);
+               struct strbuf buf = STRBUF_INIT;
+
+               strbuf_addf(&buf, "%s\t%s\n", report, sha1_to_hex(sha1));
+               write_or_die(1, buf.buf, buf.len);
+               strbuf_release(&buf);
 
                /*
                 * Let's just mimic git-unpack-objects here and write
index 66cdd45cc10afd37f93f260688700408d11b1f5f..b2d7d5ce6841cf9cb9e310c659aac043ad00cfb0 100644 (file)
@@ -17,17 +17,19 @@ static const char * const ls_remote_usage[] = {
 static int tail_match(const char **pattern, const char *path)
 {
        const char *p;
-       char pathbuf[PATH_MAX];
+       char *pathbuf;
 
        if (!pattern)
                return 1; /* no restriction */
 
-       if (snprintf(pathbuf, sizeof(pathbuf), "/%s", path) > sizeof(pathbuf))
-               return error("insanely long ref %.*s...", 20, path);
+       pathbuf = xstrfmt("/%s", path);
        while ((p = *(pattern++)) != NULL) {
-               if (!wildmatch(p, pathbuf, 0, NULL))
+               if (!wildmatch(p, pathbuf, 0, NULL)) {
+                       free(pathbuf);
                        return 1;
+               }
        }
+       free(pathbuf);
        return 0;
 }
 
index 8bdc3eaa6fa4472d8352e7de10ef9d816e8ca83f..92a5d8a5d263f78afaa2f426135998348dae53b8 100644 (file)
@@ -238,10 +238,9 @@ static const char *get_exact_ref_match(const struct object *o)
        return NULL;
 }
 
-/* returns a static buffer */
-static const char *get_rev_name(const struct object *o)
+/* may return a constant string or use "buf" as scratch space */
+static const char *get_rev_name(const struct object *o, struct strbuf *buf)
 {
-       static char buffer[1024];
        struct rev_name *n;
        struct commit *c;
 
@@ -258,10 +257,9 @@ static const char *get_rev_name(const struct object *o)
                int len = strlen(n->tip_name);
                if (len > 2 && !strcmp(n->tip_name + len - 2, "^0"))
                        len -= 2;
-               snprintf(buffer, sizeof(buffer), "%.*s~%d", len, n->tip_name,
-                               n->generation);
-
-               return buffer;
+               strbuf_reset(buf);
+               strbuf_addf(buf, "%.*s~%d", len, n->tip_name, n->generation);
+               return buf->buf;
        }
 }
 
@@ -271,10 +269,11 @@ static void show_name(const struct object *obj,
 {
        const char *name;
        const struct object_id *oid = &obj->oid;
+       struct strbuf buf = STRBUF_INIT;
 
        if (!name_only)
                printf("%s ", caller_name ? caller_name : oid_to_hex(oid));
-       name = get_rev_name(obj);
+       name = get_rev_name(obj, &buf);
        if (name)
                printf("%s\n", name);
        else if (allow_undefined)
@@ -283,6 +282,7 @@ static void show_name(const struct object *obj,
                printf("%s\n", find_unique_abbrev(oid->hash, DEFAULT_ABBREV));
        else
                die("cannot describe '%s'", oid_to_hex(oid));
+       strbuf_release(&buf);
 }
 
 static char const * const name_rev_usage[] = {
@@ -294,6 +294,7 @@ static char const * const name_rev_usage[] = {
 
 static void name_rev_line(char *p, struct name_ref_data *data)
 {
+       struct strbuf buf = STRBUF_INIT;
        int forty = 0;
        char *p_start;
        for (p_start = p; *p; p++) {
@@ -314,7 +315,7 @@ static void name_rev_line(char *p, struct name_ref_data *data)
                                struct object *o =
                                        lookup_object(sha1);
                                if (o)
-                                       name = get_rev_name(o);
+                                       name = get_rev_name(o, &buf);
                        }
                        *(p+1) = c;
 
@@ -332,6 +333,8 @@ static void name_rev_line(char *p, struct name_ref_data *data)
        /* flush */
        if (p_start != p)
                fwrite(p_start, p - p_start, 1, stdout);
+
+       strbuf_release(&buf);
 }
 
 int cmd_name_rev(int argc, const char **argv, const char *prefix)
index 0513f7455dccd15e6ec1c2c1e1d847e66af027a7..7b891471c461ddc3cd2b9d3186cc8b005f68ca2b 100644 (file)
@@ -554,7 +554,7 @@ static int append_edit(int argc, const char **argv, const char *prefix)
        struct notes_tree *t;
        unsigned char object[20], new_note[20];
        const unsigned char *note;
-       char logmsg[100];
+       char *logmsg;
        const char * const *usage;
        struct note_data d = { 0, 0, NULL, STRBUF_INIT };
        struct option options[] = {
@@ -618,17 +618,16 @@ static int append_edit(int argc, const char **argv, const char *prefix)
                write_note_data(&d, new_note);
                if (add_note(t, object, new_note, combine_notes_overwrite))
                        die("BUG: combine_notes_overwrite failed");
-               snprintf(logmsg, sizeof(logmsg), "Notes added by 'git notes %s'",
-                       argv[0]);
+               logmsg = xstrfmt("Notes added by 'git notes %s'", argv[0]);
        } else {
                fprintf(stderr, _("Removing note for object %s\n"),
                        sha1_to_hex(object));
                remove_note(t, object);
-               snprintf(logmsg, sizeof(logmsg), "Notes removed by 'git notes %s'",
-                       argv[0]);
+               logmsg = xstrfmt("Notes removed by 'git notes %s'", argv[0]);
        }
        commit_notes(t, logmsg);
 
+       free(logmsg);
        free_note_data(&d);
        free_notes(t);
        return 0;
index aca9c33d8d867d7e507f10e2eae5617b23956cdf..70202780819130ad56ea7391c319ed810d80b2a4 100644 (file)
@@ -1634,12 +1634,17 @@ static const char *parse_pack_header(struct pack_header *hdr)
 
 static const char *pack_lockfile;
 
+static void push_header_arg(struct argv_array *args, struct pack_header *hdr)
+{
+       argv_array_pushf(args, "--pack_header=%"PRIu32",%"PRIu32,
+                       ntohl(hdr->hdr_version), ntohl(hdr->hdr_entries));
+}
+
 static const char *unpack(int err_fd, struct shallow_info *si)
 {
        struct pack_header hdr;
        const char *hdr_err;
        int status;
-       char hdr_arg[38];
        struct child_process child = CHILD_PROCESS_INIT;
        int fsck_objects = (receive_fsck_objects >= 0
                            ? receive_fsck_objects
@@ -1653,9 +1658,6 @@ static const char *unpack(int err_fd, struct shallow_info *si)
                        close(err_fd);
                return hdr_err;
        }
-       snprintf(hdr_arg, sizeof(hdr_arg),
-                       "--pack_header=%"PRIu32",%"PRIu32,
-                       ntohl(hdr.hdr_version), ntohl(hdr.hdr_entries));
 
        if (si->nr_ours || si->nr_theirs) {
                alt_shallow_file = setup_temporary_shallow(si->shallow);
@@ -1679,7 +1681,8 @@ static const char *unpack(int err_fd, struct shallow_info *si)
        tmp_objdir_add_as_alternate(tmp_objdir);
 
        if (ntohl(hdr.hdr_entries) < unpack_limit) {
-               argv_array_pushl(&child.args, "unpack-objects", hdr_arg, NULL);
+               argv_array_push(&child.args, "unpack-objects");
+               push_header_arg(&child.args, &hdr);
                if (quiet)
                        argv_array_push(&child.args, "-q");
                if (fsck_objects)
@@ -1697,8 +1700,8 @@ static const char *unpack(int err_fd, struct shallow_info *si)
        } else {
                char hostname[256];
 
-               argv_array_pushl(&child.args, "index-pack",
-                                "--stdin", hdr_arg, NULL);
+               argv_array_pushl(&child.args, "index-pack", "--stdin", NULL);
+               push_header_arg(&child.args, &hdr);
 
                if (gethostname(hostname, sizeof(hostname)))
                        xsnprintf(hostname, sizeof(hostname), "localhost");
index f83e7b8fc1758aa837b4dd48708a3d6c31bcd226..065515bababe99ad04249065822584a3f2a0af69 100644 (file)
@@ -93,26 +93,31 @@ typedef int (*each_replace_name_fn)(const char *name, const char *ref,
 static int for_each_replace_name(const char **argv, each_replace_name_fn fn)
 {
        const char **p, *full_hex;
-       char ref[PATH_MAX];
+       struct strbuf ref = STRBUF_INIT;
+       size_t base_len;
        int had_error = 0;
        struct object_id oid;
 
+       strbuf_addstr(&ref, git_replace_ref_base);
+       base_len = ref.len;
+
        for (p = argv; *p; p++) {
                if (get_oid(*p, &oid)) {
                        error("Failed to resolve '%s' as a valid ref.", *p);
                        had_error = 1;
                        continue;
                }
-               full_hex = oid_to_hex(&oid);
-               snprintf(ref, sizeof(ref), "%s%s", git_replace_ref_base, full_hex);
-               /* read_ref() may reuse the buffer */
-               full_hex = ref + strlen(git_replace_ref_base);
-               if (read_ref(ref, oid.hash)) {
+
+               strbuf_setlen(&ref, base_len);
+               strbuf_addstr(&ref, oid_to_hex(&oid));
+               full_hex = ref.buf + base_len;
+
+               if (read_ref(ref.buf, oid.hash)) {
                        error("replace ref '%s' not found.", full_hex);
                        had_error = 1;
                        continue;
                }
-               if (fn(full_hex, ref, &oid))
+               if (fn(full_hex, ref.buf, &oid))
                        had_error = 1;
        }
        return had_error;
@@ -129,21 +134,18 @@ static int delete_replace_ref(const char *name, const char *ref,
 
 static void check_ref_valid(struct object_id *object,
                            struct object_id *prev,
-                           char *ref,
-                           int ref_size,
+                           struct strbuf *ref,
                            int force)
 {
-       if (snprintf(ref, ref_size,
-                    "%s%s", git_replace_ref_base,
-                    oid_to_hex(object)) > ref_size - 1)
-               die("replace ref name too long: %.*s...", 50, ref);
-       if (check_refname_format(ref, 0))
-               die("'%s' is not a valid ref name.", ref);
-
-       if (read_ref(ref, prev->hash))
+       strbuf_reset(ref);
+       strbuf_addf(ref, "%s%s", git_replace_ref_base, oid_to_hex(object));
+       if (check_refname_format(ref->buf, 0))
+               die("'%s' is not a valid ref name.", ref->buf);
+
+       if (read_ref(ref->buf, prev->hash))
                oidclr(prev);
        else if (!force)
-               die("replace ref '%s' already exists", ref);
+               die("replace ref '%s' already exists", ref->buf);
 }
 
 static int replace_object_oid(const char *object_ref,
@@ -154,7 +156,7 @@ static int replace_object_oid(const char *object_ref,
 {
        struct object_id prev;
        enum object_type obj_type, repl_type;
-       char ref[PATH_MAX];
+       struct strbuf ref = STRBUF_INIT;
        struct ref_transaction *transaction;
        struct strbuf err = STRBUF_INIT;
 
@@ -167,16 +169,17 @@ static int replace_object_oid(const char *object_ref,
                    object_ref, typename(obj_type),
                    replace_ref, typename(repl_type));
 
-       check_ref_valid(object, &prev, ref, sizeof(ref), force);
+       check_ref_valid(object, &prev, &ref, force);
 
        transaction = ref_transaction_begin(&err);
        if (!transaction ||
-           ref_transaction_update(transaction, ref, repl->hash, prev.hash,
+           ref_transaction_update(transaction, ref.buf, repl->hash, prev.hash,
                                   0, NULL, &err) ||
            ref_transaction_commit(transaction, &err))
                die("%s", err.buf);
 
        ref_transaction_free(transaction);
+       strbuf_release(&ref);
        return 0;
 }
 
@@ -280,7 +283,7 @@ static int edit_and_replace(const char *object_ref, int force, int raw)
        char *tmpfile = git_pathdup("REPLACE_EDITOBJ");
        enum object_type type;
        struct object_id old, new, prev;
-       char ref[PATH_MAX];
+       struct strbuf ref = STRBUF_INIT;
 
        if (get_oid(object_ref, &old) < 0)
                die("Not a valid object name: '%s'", object_ref);
@@ -289,7 +292,8 @@ static int edit_and_replace(const char *object_ref, int force, int raw)
        if (type < 0)
                die("unable to get object type for %s", oid_to_hex(&old));
 
-       check_ref_valid(&old, &prev, ref, sizeof(ref), force);
+       check_ref_valid(&old, &prev, &ref, force);
+       strbuf_release(&ref);
 
        export_object(&old, type, raw, tmpfile);
        if (launch_editor(tmpfile, NULL, NULL) < 0)
index 9e53a1a7ca4a4ffa0bd810673d432c6f2449f5a5..f54d7b5028a455eae9b133e72ac24333c5035f2e 100644 (file)
@@ -213,13 +213,14 @@ static int show_abbrev(const unsigned char *sha1, void *cb_data)
 
 static void show_datestring(const char *flag, const char *datestr)
 {
-       static char buffer[100];
+       char *buffer;
 
        /* date handling requires both flags and revs */
        if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
                return;
-       snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
+       buffer = xstrfmt("%s%lu", flag, approxidate(datestr));
        show(buffer);
+       free(buffer);
 }
 
 static int show_file(const char *arg, int output_prefix)
index dbc6f5b74b6c64153bc8e1cc5e24830586cbcfe1..222404522fd8db970c5f832338095c6947548ac9 100644 (file)
@@ -72,25 +72,22 @@ static int for_each_tag_name(const char **argv, each_tag_name_fn fn,
                             const void *cb_data)
 {
        const char **p;
-       char ref[PATH_MAX];
+       struct strbuf ref = STRBUF_INIT;
        int had_error = 0;
        unsigned char sha1[20];
 
        for (p = argv; *p; p++) {
-               if (snprintf(ref, sizeof(ref), "refs/tags/%s", *p)
-                                       >= sizeof(ref)) {
-                       error(_("tag name too long: %.*s..."), 50, *p);
-                       had_error = 1;
-                       continue;
-               }
-               if (read_ref(ref, sha1)) {
+               strbuf_reset(&ref);
+               strbuf_addf(&ref, "refs/tags/%s", *p);
+               if (read_ref(ref.buf, sha1)) {
                        error(_("tag '%s' not found."), *p);
                        had_error = 1;
                        continue;
                }
-               if (fn(*p, ref, sha1, cb_data))
+               if (fn(*p, ref.buf, sha1, cb_data))
                        had_error = 1;
        }
+       strbuf_release(&ref);
        return had_error;
 }
 
@@ -231,26 +228,22 @@ static void create_tag(const unsigned char *object, const char *tag,
                       unsigned char *prev, unsigned char *result)
 {
        enum object_type type;
-       char header_buf[1024];
-       int header_len;
+       struct strbuf header = STRBUF_INIT;
        char *path = NULL;
 
        type = sha1_object_info(object, NULL);
        if (type <= OBJ_NONE)
            die(_("bad object type."));
 
-       header_len = snprintf(header_buf, sizeof(header_buf),
-                         "object %s\n"
-                         "type %s\n"
-                         "tag %s\n"
-                         "tagger %s\n\n",
-                         sha1_to_hex(object),
-                         typename(type),
-                         tag,
-                         git_committer_info(IDENT_STRICT));
-
-       if (header_len > sizeof(header_buf) - 1)
-               die(_("tag header too big."));
+       strbuf_addf(&header,
+                   "object %s\n"
+                   "type %s\n"
+                   "tag %s\n"
+                   "tagger %s\n\n",
+                   sha1_to_hex(object),
+                   typename(type),
+                   tag,
+                   git_committer_info(IDENT_STRICT));
 
        if (!opt->message_given) {
                int fd;
@@ -288,7 +281,8 @@ static void create_tag(const unsigned char *object, const char *tag,
        if (!opt->message_given && !buf->len)
                die(_("no tag message?"));
 
-       strbuf_insert(buf, 0, header_buf, header_len);
+       strbuf_insert(buf, 0, header.buf, header.len);
+       strbuf_release(&header);
 
        if (build_tag_object(buf, opt->sign, result) < 0) {
                if (path)
diff --git a/cache.h b/cache.h
index 5c8078291c478f579d6b8bcc69417ac6adb1ced0..556468c25b8c3a06eb776fbf322bed805ec97c33 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -1675,9 +1675,12 @@ extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
 extern void pack_report(void);
 
 /*
- * Create a temporary file rooted in the object database directory.
+ * Create a temporary file rooted in the object database directory, or
+ * die on failure. The filename is taken from "pattern", which should have the
+ * usual "XXXXXX" trailer, and the resulting filename is written into the
+ * "template" buffer. Returns the open descriptor.
  */
-extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
+extern int odb_mkstemp(struct strbuf *template, const char *pattern);
 
 /*
  * Generate the filename to be used for a pack file with checksum "sha1" and
index 59501db99a74ab8f237766730045dda4ecd112b2..d3560573acee6ed216dca9779aa078738e9246b1 100644 (file)
@@ -292,9 +292,10 @@ static char *grab_blob(const struct object_id *oid, unsigned int mode,
        enum object_type type;
 
        if (S_ISGITLINK(mode)) {
-               blob = xmalloc(100);
-               *size = snprintf(blob, 100,
-                                "Subproject commit %s\n", oid_to_hex(oid));
+               struct strbuf buf = STRBUF_INIT;
+               strbuf_addf(&buf, "Subproject commit %s\n", oid_to_hex(oid));
+               *size = buf.len;
+               blob = strbuf_detach(&buf, NULL);
        } else if (is_null_oid(oid)) {
                /* deleted blob */
                *size = 0;
index 473e6b6b63c42e59d5a89985b2573ab5c2815157..f70d27b8260bf09443ea587d8fab61f97d66acfb 100644 (file)
--- a/daemon.c
+++ b/daemon.c
@@ -449,46 +449,42 @@ static void copy_to_log(int fd)
        fclose(fp);
 }
 
-static int run_service_command(const char **argv)
+static int run_service_command(struct child_process *cld)
 {
-       struct child_process cld = CHILD_PROCESS_INIT;
-
-       cld.argv = argv;
-       cld.git_cmd = 1;
-       cld.err = -1;
-       if (start_command(&cld))
+       argv_array_push(&cld->args, ".");
+       cld->git_cmd = 1;
+       cld->err = -1;
+       if (start_command(cld))
                return -1;
 
        close(0);
        close(1);
 
-       copy_to_log(cld.err);
+       copy_to_log(cld->err);
 
-       return finish_command(&cld);
+       return finish_command(cld);
 }
 
 static int upload_pack(void)
 {
-       /* Timeout as string */
-       char timeout_buf[64];
-       const char *argv[] = { "upload-pack", "--strict", NULL, ".", NULL };
-
-       argv[2] = timeout_buf;
-
-       snprintf(timeout_buf, sizeof timeout_buf, "--timeout=%u", timeout);
-       return run_service_command(argv);
+       struct child_process cld = CHILD_PROCESS_INIT;
+       argv_array_pushl(&cld.args, "upload-pack", "--strict", NULL);
+       argv_array_pushf(&cld.args, "--timeout=%u", timeout);
+       return run_service_command(&cld);
 }
 
 static int upload_archive(void)
 {
-       static const char *argv[] = { "upload-archive", ".", NULL };
-       return run_service_command(argv);
+       struct child_process cld = CHILD_PROCESS_INIT;
+       argv_array_push(&cld.args, "upload-archive");
+       return run_service_command(&cld);
 }
 
 static int receive_pack(void)
 {
-       static const char *argv[] = { "receive-pack", ".", NULL };
-       return run_service_command(argv);
+       struct child_process cld = CHILD_PROCESS_INIT;
+       argv_array_push(&cld.args, "receive-pack");
+       return run_service_command(&cld);
 }
 
 static struct daemon_service daemon_service[] = {
diff --git a/diff.c b/diff.c
index 58cb72d7e72a85bad9ae9fe8a198fef1cb1b15f8..92d78e4596f23af9b0b31b1a4d36fdfcbd72be55 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -4570,6 +4570,19 @@ static void patch_id_consume(void *priv, char *line, unsigned long len)
        data->patchlen += new_len;
 }
 
+static void patch_id_add_string(git_SHA_CTX *ctx, const char *str)
+{
+       git_SHA1_Update(ctx, str, strlen(str));
+}
+
+static void patch_id_add_mode(git_SHA_CTX *ctx, unsigned mode)
+{
+       /* large enough for 2^32 in octal */
+       char buf[12];
+       int len = xsnprintf(buf, sizeof(buf), "%06o", mode);
+       git_SHA1_Update(ctx, buf, len);
+}
+
 /* returns 0 upon success, and writes result into sha1 */
 static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1, int diff_header_only)
 {
@@ -4577,7 +4590,6 @@ static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1,
        int i;
        git_SHA_CTX ctx;
        struct patch_id_t data;
-       char buffer[PATH_MAX * 4 + 20];
 
        git_SHA1_Init(&ctx);
        memset(&data, 0, sizeof(struct patch_id_t));
@@ -4609,36 +4621,30 @@ static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1,
 
                len1 = remove_space(p->one->path, strlen(p->one->path));
                len2 = remove_space(p->two->path, strlen(p->two->path));
-               if (p->one->mode == 0)
-                       len1 = snprintf(buffer, sizeof(buffer),
-                                       "diff--gita/%.*sb/%.*s"
-                                       "newfilemode%06o"
-                                       "---/dev/null"
-                                       "+++b/%.*s",
-                                       len1, p->one->path,
-                                       len2, p->two->path,
-                                       p->two->mode,
-                                       len2, p->two->path);
-               else if (p->two->mode == 0)
-                       len1 = snprintf(buffer, sizeof(buffer),
-                                       "diff--gita/%.*sb/%.*s"
-                                       "deletedfilemode%06o"
-                                       "---a/%.*s"
-                                       "+++/dev/null",
-                                       len1, p->one->path,
-                                       len2, p->two->path,
-                                       p->one->mode,
-                                       len1, p->one->path);
-               else
-                       len1 = snprintf(buffer, sizeof(buffer),
-                                       "diff--gita/%.*sb/%.*s"
-                                       "---a/%.*s"
-                                       "+++b/%.*s",
-                                       len1, p->one->path,
-                                       len2, p->two->path,
-                                       len1, p->one->path,
-                                       len2, p->two->path);
-               git_SHA1_Update(&ctx, buffer, len1);
+               patch_id_add_string(&ctx, "diff--git");
+               patch_id_add_string(&ctx, "a/");
+               git_SHA1_Update(&ctx, p->one->path, len1);
+               patch_id_add_string(&ctx, "b/");
+               git_SHA1_Update(&ctx, p->two->path, len2);
+
+               if (p->one->mode == 0) {
+                       patch_id_add_string(&ctx, "newfilemode");
+                       patch_id_add_mode(&ctx, p->two->mode);
+                       patch_id_add_string(&ctx, "---/dev/null");
+                       patch_id_add_string(&ctx, "+++b/");
+                       git_SHA1_Update(&ctx, p->two->path, len2);
+               } else if (p->two->mode == 0) {
+                       patch_id_add_string(&ctx, "deletedfilemode");
+                       patch_id_add_mode(&ctx, p->one->mode);
+                       patch_id_add_string(&ctx, "---a/");
+                       git_SHA1_Update(&ctx, p->one->path, len1);
+                       patch_id_add_string(&ctx, "+++/dev/null");
+               } else {
+                       patch_id_add_string(&ctx, "---a/");
+                       git_SHA1_Update(&ctx, p->one->path, len1);
+                       patch_id_add_string(&ctx, "+++b/");
+                       git_SHA1_Update(&ctx, p->two->path, len2);
+               }
 
                if (diff_header_only)
                        continue;
index a17d96aa85bd9196da9090c768090aeec8b6b8be..ff6e4f06e93d642aa53ba1812c3788b0ccad092e 100644 (file)
@@ -277,7 +277,7 @@ char *get_object_directory(void)
        return git_object_dir;
 }
 
-int odb_mkstemp(char *template, size_t limit, const char *pattern)
+int odb_mkstemp(struct strbuf *template, const char *pattern)
 {
        int fd;
        /*
@@ -285,18 +285,16 @@ int odb_mkstemp(char *template, size_t limit, const char *pattern)
         * restrictive except to remove write permission.
         */
        int mode = 0444;
-       snprintf(template, limit, "%s/%s",
-                get_object_directory(), pattern);
-       fd = git_mkstemp_mode(template, mode);
+       git_path_buf(template, "objects/%s", pattern);
+       fd = git_mkstemp_mode(template->buf, mode);
        if (0 <= fd)
                return fd;
 
        /* slow path */
        /* some mkstemp implementations erase template on failure */
-       snprintf(template, limit, "%s/%s",
-                get_object_directory(), pattern);
-       safe_create_leading_directories(template);
-       return xmkstemp_mode(template, mode);
+       git_path_buf(template, "objects/%s", pattern);
+       safe_create_leading_directories(template->buf);
+       return xmkstemp_mode(template->buf, mode);
 }
 
 int odb_pack_keep(const char *name)
index f6f416f20a9f4c05f90690fcd7bfe049a8c91467..1ea3a08609bd8ece7a22ce33c78a0a798304375f 100644 (file)
@@ -890,14 +890,15 @@ static struct tree_content *dup_tree_content(struct tree_content *s)
 
 static void start_packfile(void)
 {
-       static char tmp_file[PATH_MAX];
+       struct strbuf tmp_file = STRBUF_INIT;
        struct packed_git *p;
        struct pack_header hdr;
        int pack_fd;
 
-       pack_fd = odb_mkstemp(tmp_file, sizeof(tmp_file),
-                             "pack/tmp_pack_XXXXXX");
-       FLEX_ALLOC_STR(p, pack_name, tmp_file);
+       pack_fd = odb_mkstemp(&tmp_file, "pack/tmp_pack_XXXXXX");
+       FLEX_ALLOC_STR(p, pack_name, tmp_file.buf);
+       strbuf_release(&tmp_file);
+
        p->pack_fd = pack_fd;
        p->do_not_close = 1;
        pack_file = sha1fd(pack_fd, p->pack_name);
diff --git a/grep.c b/grep.c
index 56ef0ecbfffd8531a5b88585efc0c9097e182ed6..47cee4506703f5dd2b7db84e09dae93adf99fbaf 100644 (file)
--- a/grep.c
+++ b/grep.c
@@ -1171,7 +1171,7 @@ static void show_line(struct grep_opt *opt, char *bol, char *eol,
        }
        if (opt->linenum) {
                char buf[32];
-               snprintf(buf, sizeof(buf), "%d", lno);
+               xsnprintf(buf, sizeof(buf), "%d", lno);
                output_color(opt, buf, strlen(buf), opt->color_lineno);
                output_sep(opt, sign);
        }
@@ -1653,7 +1653,7 @@ static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int colle
                                     opt->color_filename);
                        output_sep(opt, ':');
                }
-               snprintf(buf, sizeof(buf), "%u\n", count);
+               xsnprintf(buf, sizeof(buf), "%u\n", count);
                opt->output(opt, buf, strlen(buf));
                return 1;
        }
diff --git a/http.c b/http.c
index 96d84bbed3f66153cc3d817f2b342dc5d1600574..8d94e2c63ae30868c8676647b4524bedfd9eaddd 100644 (file)
--- a/http.c
+++ b/http.c
@@ -1366,9 +1366,9 @@ static int handle_curl_result(struct slot_results *results)
                 * FAILONERROR it is lost, so we can give only the numeric
                 * status code.
                 */
-               snprintf(curl_errorstr, sizeof(curl_errorstr),
-                        "The requested URL returned error: %ld",
-                        results->http_code);
+               xsnprintf(curl_errorstr, sizeof(curl_errorstr),
+                         "The requested URL returned error: %ld",
+                         results->http_code);
        }
 
        if (results->curl_result == CURLE_OK) {
@@ -1410,8 +1410,8 @@ int run_one_slot(struct active_request_slot *slot,
 {
        slot->results = results;
        if (!start_active_slot(slot)) {
-               snprintf(curl_errorstr, sizeof(curl_errorstr),
-                        "failed to start HTTP request");
+               xsnprintf(curl_errorstr, sizeof(curl_errorstr),
+                         "failed to start HTTP request");
                return HTTP_START_FAILED;
        }
 
index 5c7e27a89459a9a63018cc469262c82891c6f7b7..857591660f485d65dec3390b22dd2083c94d7a44 100644 (file)
@@ -964,7 +964,7 @@ static struct imap_store *imap_open_store(struct imap_server_conf *srvc, char *f
                int gai;
                char portstr[6];
 
-               snprintf(portstr, sizeof(portstr), "%d", srvc->port);
+               xsnprintf(portstr, sizeof(portstr), "%d", srvc->port);
 
                memset(&hints, 0, sizeof(hints));
                hints.ai_socktype = SOCK_STREAM;
index 9705596014c8fcf534fd0478606d478164382913..e313f4f2bc69f967ec4354e80cd62b329c7bcb21 100644 (file)
@@ -508,18 +508,16 @@ void bitmap_writer_finish(struct pack_idx_entry **index,
                          const char *filename,
                          uint16_t options)
 {
-       static char tmp_file[PATH_MAX];
        static uint16_t default_version = 1;
        static uint16_t flags = BITMAP_OPT_FULL_DAG;
+       struct strbuf tmp_file = STRBUF_INIT;
        struct sha1file *f;
 
        struct bitmap_disk_header header;
 
-       int fd = odb_mkstemp(tmp_file, sizeof(tmp_file), "pack/tmp_bitmap_XXXXXX");
+       int fd = odb_mkstemp(&tmp_file, "pack/tmp_bitmap_XXXXXX");
 
-       if (fd < 0)
-               die_errno("unable to create '%s'", tmp_file);
-       f = sha1fd(fd, tmp_file);
+       f = sha1fd(fd, tmp_file.buf);
 
        memcpy(header.magic, BITMAP_IDX_SIGNATURE, sizeof(BITMAP_IDX_SIGNATURE));
        header.version = htons(default_version);
@@ -539,9 +537,11 @@ void bitmap_writer_finish(struct pack_idx_entry **index,
 
        sha1close(f, NULL, CSUM_FSYNC);
 
-       if (adjust_shared_perm(tmp_file))
+       if (adjust_shared_perm(tmp_file.buf))
                die_errno("unable to make temporary bitmap file readable");
 
-       if (rename(tmp_file, filename))
+       if (rename(tmp_file.buf, filename))
                die_errno("unable to rename temporary bitmap file to '%s'", filename);
+
+       strbuf_release(&tmp_file);
 }
index c057513f12724254afa5a1550bfa9ada9deb943c..fa97b72559883a38be147fab737f6b7adae5975b 100644 (file)
@@ -71,15 +71,15 @@ const char *write_idx_file(const char *index_name, struct pack_idx_entry **objec
                f = sha1fd_check(index_name);
        } else {
                if (!index_name) {
-                       static char tmp_file[PATH_MAX];
-                       fd = odb_mkstemp(tmp_file, sizeof(tmp_file), "pack/tmp_idx_XXXXXX");
-                       index_name = xstrdup(tmp_file);
+                       struct strbuf tmp_file = STRBUF_INIT;
+                       fd = odb_mkstemp(&tmp_file, "pack/tmp_idx_XXXXXX");
+                       index_name = strbuf_detach(&tmp_file, NULL);
                } else {
                        unlink(index_name);
                        fd = open(index_name, O_CREAT|O_EXCL|O_WRONLY, 0600);
+                       if (fd < 0)
+                               die_errno("unable to create '%s'", index_name);
                }
-               if (fd < 0)
-                       die_errno("unable to create '%s'", index_name);
                f = sha1fd(fd, index_name);
        }
 
@@ -329,11 +329,11 @@ int encode_in_pack_object_header(unsigned char *hdr, int hdr_len,
 
 struct sha1file *create_tmp_packfile(char **pack_tmp_name)
 {
-       char tmpname[PATH_MAX];
+       struct strbuf tmpname = STRBUF_INIT;
        int fd;
 
-       fd = odb_mkstemp(tmpname, sizeof(tmpname), "pack/tmp_pack_XXXXXX");
-       *pack_tmp_name = xstrdup(tmpname);
+       fd = odb_mkstemp(&tmpname, "pack/tmp_pack_XXXXXX");
+       *pack_tmp_name = strbuf_detach(&tmpname, NULL);
        return sha1fd(fd, *pack_tmp_name);
 }
 
diff --git a/refs.c b/refs.c
index 0272e332cc9951497dddcd8b5c57a30e80552b4f..c2472184a724197dac236ae7b2a0c06e8168aad5 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -429,29 +429,31 @@ int expand_ref(const char *str, int len, unsigned char *sha1, char **ref)
 {
        const char **p, *r;
        int refs_found = 0;
+       struct strbuf fullref = STRBUF_INIT;
 
        *ref = NULL;
        for (p = ref_rev_parse_rules; *p; p++) {
-               char fullref[PATH_MAX];
                unsigned char sha1_from_ref[20];
                unsigned char *this_result;
                int flag;
 
                this_result = refs_found ? sha1_from_ref : sha1;
-               mksnpath(fullref, sizeof(fullref), *p, len, str);
-               r = resolve_ref_unsafe(fullref, RESOLVE_REF_READING,
+               strbuf_reset(&fullref);
+               strbuf_addf(&fullref, *p, len, str);
+               r = resolve_ref_unsafe(fullref.buf, RESOLVE_REF_READING,
                                       this_result, &flag);
                if (r) {
                        if (!refs_found++)
                                *ref = xstrdup(r);
                        if (!warn_ambiguous_refs)
                                break;
-               } else if ((flag & REF_ISSYMREF) && strcmp(fullref, "HEAD")) {
-                       warning("ignoring dangling symref %s.", fullref);
-               } else if ((flag & REF_ISBROKEN) && strchr(fullref, '/')) {
-                       warning("ignoring broken ref %s.", fullref);
+               } else if ((flag & REF_ISSYMREF) && strcmp(fullref.buf, "HEAD")) {
+                       warning("ignoring dangling symref %s.", fullref.buf);
+               } else if ((flag & REF_ISBROKEN) && strchr(fullref.buf, '/')) {
+                       warning("ignoring broken ref %s.", fullref.buf);
                }
        }
+       strbuf_release(&fullref);
        return refs_found;
 }
 
@@ -460,21 +462,22 @@ int dwim_log(const char *str, int len, unsigned char *sha1, char **log)
        char *last_branch = substitute_branch_name(&str, &len);
        const char **p;
        int logs_found = 0;
+       struct strbuf path = STRBUF_INIT;
 
        *log = NULL;
        for (p = ref_rev_parse_rules; *p; p++) {
                unsigned char hash[20];
-               char path[PATH_MAX];
                const char *ref, *it;
 
-               mksnpath(path, sizeof(path), *p, len, str);
-               ref = resolve_ref_unsafe(path, RESOLVE_REF_READING,
+               strbuf_reset(&path);
+               strbuf_addf(&path, *p, len, str);
+               ref = resolve_ref_unsafe(path.buf, RESOLVE_REF_READING,
                                         hash, NULL);
                if (!ref)
                        continue;
-               if (reflog_exists(path))
-                       it = path;
-               else if (strcmp(ref, path) && reflog_exists(ref))
+               if (reflog_exists(path.buf))
+                       it = path.buf;
+               else if (strcmp(ref, path.buf) && reflog_exists(ref))
                        it = ref;
                else
                        continue;
@@ -485,6 +488,7 @@ int dwim_log(const char *str, int len, unsigned char *sha1, char **log)
                if (!warn_ambiguous_refs)
                        break;
        }
+       strbuf_release(&path);
        free(last_branch);
        return logs_found;
 }
@@ -944,6 +948,7 @@ char *shorten_unambiguous_ref(const char *refname, int strict)
        static char **scanf_fmts;
        static int nr_rules;
        char *short_name;
+       struct strbuf resolved_buf = STRBUF_INIT;
 
        if (!nr_rules) {
                /*
@@ -1002,7 +1007,6 @@ char *shorten_unambiguous_ref(const char *refname, int strict)
                 */
                for (j = 0; j < rules_to_fail; j++) {
                        const char *rule = ref_rev_parse_rules[j];
-                       char refname[PATH_MAX];
 
                        /* skip matched rule */
                        if (i == j)
@@ -1013,9 +1017,10 @@ char *shorten_unambiguous_ref(const char *refname, int strict)
                         * (with this previous rule) to a valid ref
                         * read_ref() returns 0 on success
                         */
-                       mksnpath(refname, sizeof(refname),
-                                rule, short_name_len, short_name);
-                       if (ref_exists(refname))
+                       strbuf_reset(&resolved_buf);
+                       strbuf_addf(&resolved_buf, rule,
+                                   short_name_len, short_name);
+                       if (ref_exists(resolved_buf.buf))
                                break;
                }
 
@@ -1023,10 +1028,13 @@ char *shorten_unambiguous_ref(const char *refname, int strict)
                 * short name is non-ambiguous if all previous rules
                 * haven't resolved to a valid ref
                 */
-               if (j == rules_to_fail)
+               if (j == rules_to_fail) {
+                       strbuf_release(&resolved_buf);
                        return short_name;
+               }
        }
 
+       strbuf_release(&resolved_buf);
        free(short_name);
        return xstrdup(refname);
 }
index 71063890ffe9cfe33f876dd8b2306458323c6f30..43990dec735099fd2e94cf73e41f318fbaf5dd38 100644 (file)
@@ -3762,8 +3762,8 @@ static int for_each_file_in_obj_subdir(int subdir_nr,
                        char hex[GIT_SHA1_HEXSZ+1];
                        struct object_id oid;
 
-                       snprintf(hex, sizeof(hex), "%02x%s",
-                                subdir_nr, de->d_name);
+                       xsnprintf(hex, sizeof(hex), "%02x%s",
+                                 subdir_nr, de->d_name);
                        if (!get_oid_hex(hex, &oid)) {
                                if (obj_cb) {
                                        r = obj_cb(&oid, path->buf, data);
index c52d6634c528d79ddedf069b7e09e955d283ed64..83b13b8ff5fa31a213dcd1d87f67a919441494fa 100644 (file)
@@ -1436,7 +1436,7 @@ static int find_first_merges(struct object_array *result, const char *path,
        memset(&rev_opts, 0, sizeof(rev_opts));
 
        /* get all revisions that merge commit a */
-       snprintf(merged_revision, sizeof(merged_revision), "^%s",
+       xsnprintf(merged_revision, sizeof(merged_revision), "^%s",
                        oid_to_hex(&a->object.oid));
        init_revisions(&revs, NULL);
        rev_opts.submodule = path;
index dc90a1fb769c078be2fbf77018242b6fc209acf6..36408046eb28d8af3c90614f73ee8112855b4677 100644 (file)
@@ -347,14 +347,11 @@ static int set_helper_option(struct transport *transport,
 static void standard_options(struct transport *t)
 {
        char buf[16];
-       int n;
        int v = t->verbose;
 
        set_helper_option(t, "progress", t->progress ? "true" : "false");
 
-       n = snprintf(buf, sizeof(buf), "%d", v + 1);
-       if (n >= sizeof(buf))
-               die("impossibly large verbosity value");
+       xsnprintf(buf, sizeof(buf), "%d", v + 1);
        set_helper_option(t, "verbosity", buf);
 
        switch (t->family) {