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builtin/receive-pack: convert portions to struct object_id

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Convert some hardcoded constants into uses of parse_oid_hex.
Additionally, convert all uses of struct command, and miscellaneous
other functions necessary for that.  This work is necessary to be able
to convert sha1_array_append later on.

To avoid needing to specify a constant, reject shallow lines with the
wrong length instead of simply ignoring them.

Note that in queue_command we are guaranteed to have a NUL-terminated
buffer or at least one byte of overflow that we can safely read, so the
linelen check can be elided.  We would die in such a case, but not read
invalid memory.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
brian m. carlson 2017-03-26 16:01:29 +00:00 committed by Junio C Hamano
parent 14bb40b3f0
commit 9c44ea4403
1 changed files with 49 additions and 49 deletions
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98
builtin/receive-pack.c
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@ -309,8 +309,8 @@ struct command {
unsigned int skip_update:1,
did_not_exist:1;
int index;
unsigned char old_sha1[20];
unsigned char new_sha1[20];
struct object_id old_oid;
struct object_id new_oid;
char ref_name[FLEX_ARRAY]; /* more */
};
@ -723,7 +723,7 @@ static int feed_receive_hook(void *state_, const char **bufp, size_t *sizep)
return -1; /* EOF */
strbuf_reset(&state->buf);
strbuf_addf(&state->buf, "%s %s %s\n",
sha1_to_hex(cmd->old_sha1), sha1_to_hex(cmd->new_sha1),
oid_to_hex(&cmd->old_oid), oid_to_hex(&cmd->new_oid),
cmd->ref_name);
state->cmd = cmd->next;
if (bufp) {
@ -764,8 +764,8 @@ static int run_update_hook(struct command *cmd)
return 0;
argv[1] = cmd->ref_name;
argv[2] = sha1_to_hex(cmd->old_sha1);
argv[3] = sha1_to_hex(cmd->new_sha1);
argv[2] = oid_to_hex(&cmd->old_oid);
argv[3] = oid_to_hex(&cmd->new_oid);
argv[4] = NULL;
proc.no_stdin = 1;
@ -988,8 +988,8 @@ static const char *update(struct command *cmd, struct shallow_info *si)
const char *name = cmd->ref_name;
struct strbuf namespaced_name_buf = STRBUF_INIT;
const char *namespaced_name, *ret;
unsigned char *old_sha1 = cmd->old_sha1;
unsigned char *new_sha1 = cmd->new_sha1;
struct object_id *old_oid = &cmd->old_oid;
struct object_id *new_oid = &cmd->new_oid;
/* only refs/... are allowed */
if (!starts_with(name, "refs/") || check_refname_format(name + 5, 0)) {
@ -1014,20 +1014,20 @@ static const char *update(struct command *cmd, struct shallow_info *si)
refuse_unconfigured_deny();
return "branch is currently checked out";
case DENY_UPDATE_INSTEAD:
ret = update_worktree(new_sha1);
ret = update_worktree(new_oid->hash);
if (ret)
return ret;
break;
}
}
if (!is_null_sha1(new_sha1) && !has_sha1_file(new_sha1)) {
if (!is_null_oid(new_oid) && !has_object_file(new_oid)) {
error("unpack should have generated %s, "
"but I can't find it!", sha1_to_hex(new_sha1));
"but I can't find it!", oid_to_hex(new_oid));
return "bad pack";
}
if (!is_null_sha1(old_sha1) && is_null_sha1(new_sha1)) {
if (!is_null_oid(old_oid) && is_null_oid(new_oid)) {
if (deny_deletes && starts_with(name, "refs/heads/")) {
rp_error("denying ref deletion for %s", name);
return "deletion prohibited";
@ -1053,14 +1053,14 @@ static const char *update(struct command *cmd, struct shallow_info *si)
}
}
if (deny_non_fast_forwards && !is_null_sha1(new_sha1) &&
!is_null_sha1(old_sha1) &&
if (deny_non_fast_forwards && !is_null_oid(new_oid) &&
!is_null_oid(old_oid) &&
starts_with(name, "refs/heads/")) {
struct object *old_object, *new_object;
struct commit *old_commit, *new_commit;
old_object = parse_object(old_sha1);
new_object = parse_object(new_sha1);
old_object = parse_object(old_oid->hash);
new_object = parse_object(new_oid->hash);
if (!old_object || !new_object ||
old_object->type != OBJ_COMMIT ||
@ -1081,10 +1081,10 @@ static const char *update(struct command *cmd, struct shallow_info *si)
return "hook declined";
}
if (is_null_sha1(new_sha1)) {
if (is_null_oid(new_oid)) {
struct strbuf err = STRBUF_INIT;
if (!parse_object(old_sha1)) {
old_sha1 = NULL;
if (!parse_object(old_oid->hash)) {
old_oid = NULL;
if (ref_exists(name)) {
rp_warning("Allowing deletion of corrupt ref.");
} else {
@ -1094,7 +1094,7 @@ static const char *update(struct command *cmd, struct shallow_info *si)
}
if (ref_transaction_delete(transaction,
namespaced_name,
old_sha1,
old_oid->hash,
0, "push", &err)) {
rp_error("%s", err.buf);
strbuf_release(&err);
@ -1111,7 +1111,7 @@ static const char *update(struct command *cmd, struct shallow_info *si)
if (ref_transaction_update(transaction,
namespaced_name,
new_sha1, old_sha1,
new_oid->hash, old_oid->hash,
0, "push",
&err)) {
rp_error("%s", err.buf);
@ -1187,8 +1187,8 @@ static void check_aliased_update(struct command *cmd, struct string_list *list)
dst_cmd = (struct command *) item->util;
if (!hashcmp(cmd->old_sha1, dst_cmd->old_sha1) &&
!hashcmp(cmd->new_sha1, dst_cmd->new_sha1))
if (!oidcmp(&cmd->old_oid, &dst_cmd->old_oid) &&
!oidcmp(&cmd->new_oid, &dst_cmd->new_oid))
return;
dst_cmd->skip_update = 1;
@ -1196,11 +1196,11 @@ static void check_aliased_update(struct command *cmd, struct string_list *list)
rp_error("refusing inconsistent update between symref '%s' (%s..%s) and"
" its target '%s' (%s..%s)",
cmd->ref_name,
find_unique_abbrev(cmd->old_sha1, DEFAULT_ABBREV),
find_unique_abbrev(cmd->new_sha1, DEFAULT_ABBREV),
find_unique_abbrev(cmd->old_oid.hash, DEFAULT_ABBREV),
find_unique_abbrev(cmd->new_oid.hash, DEFAULT_ABBREV),
dst_cmd->ref_name,
find_unique_abbrev(dst_cmd->old_sha1, DEFAULT_ABBREV),
find_unique_abbrev(dst_cmd->new_sha1, DEFAULT_ABBREV));
find_unique_abbrev(dst_cmd->old_oid.hash, DEFAULT_ABBREV),
find_unique_abbrev(dst_cmd->new_oid.hash, DEFAULT_ABBREV));
cmd->error_string = dst_cmd->error_string =
"inconsistent aliased update";
@ -1231,10 +1231,10 @@ static int command_singleton_iterator(void *cb_data, unsigned char sha1[20])
struct command **cmd_list = cb_data;
struct command *cmd = *cmd_list;
if (!cmd || is_null_sha1(cmd->new_sha1))
if (!cmd || is_null_oid(&cmd->new_oid))
return -1; /* end of list */
*cmd_list = NULL; /* this returns only one */
hashcpy(sha1, cmd->new_sha1);
hashcpy(sha1, cmd->new_oid.hash);
return 0;
}
@ -1275,8 +1275,8 @@ static int iterate_receive_command_list(void *cb_data, unsigned char sha1[20])
if (shallow_update && data->si->shallow_ref[cmd->index])
/* to be checked in update_shallow_ref() */
continue;
if (!is_null_sha1(cmd->new_sha1) && !cmd->skip_update) {
hashcpy(sha1, cmd->new_sha1);
if (!is_null_oid(&cmd->new_oid) && !cmd->skip_update) {
hashcpy(sha1, cmd->new_oid.hash);
*cmd_list = cmd->next;
return 0;
}
@ -1303,7 +1303,7 @@ static void reject_updates_to_hidden(struct command *commands)
if (!ref_is_hidden(cmd->ref_name, refname_full.buf))
continue;
if (is_null_sha1(cmd->new_sha1))
if (is_null_oid(&cmd->new_oid))
cmd->error_string = "deny deleting a hidden ref";
else
cmd->error_string = "deny updating a hidden ref";
@ -1486,23 +1486,23 @@ static struct command **queue_command(struct command **tail,
const char *line,
int linelen)
{
unsigned char old_sha1[20], new_sha1[20];
struct object_id old_oid, new_oid;
struct command *cmd;
const char *refname;
int reflen;
const char *p;
if (linelen < 83 ||
line[40] != ' ' ||
line[81] != ' ' ||
get_sha1_hex(line, old_sha1) ||
get_sha1_hex(line + 41, new_sha1))
if (parse_oid_hex(line, &old_oid, &p) ||
*p++ != ' ' ||
parse_oid_hex(p, &new_oid, &p) ||
*p++ != ' ')
die("protocol error: expected old/new/ref, got '%s'", line);
refname = line + 82;
reflen = linelen - 82;
refname = p;
reflen = linelen - (p - line);
FLEX_ALLOC_MEM(cmd, ref_name, refname, reflen);
hashcpy(cmd->old_sha1, old_sha1);
hashcpy(cmd->new_sha1, new_sha1);
oidcpy(&cmd->old_oid, &old_oid);
oidcpy(&cmd->new_oid, &new_oid);
*tail = cmd;
return &cmd->next;
}
@ -1541,12 +1541,12 @@ static struct command *read_head_info(struct sha1_array *shallow)
if (!line)
break;
if (len == 48 && starts_with(line, "shallow ")) {
unsigned char sha1[20];
if (get_sha1_hex(line + 8, sha1))
if (len > 8 && starts_with(line, "shallow ")) {
struct object_id oid;
if (get_oid_hex(line + 8, &oid))
die("protocol error: expected shallow sha, got '%s'",
line + 8);
sha1_array_append(shallow, sha1);
sha1_array_append(shallow, oid.hash);
continue;
}
@ -1815,9 +1815,9 @@ static void update_shallow_info(struct command *commands,
}
for (cmd = commands; cmd; cmd = cmd->next) {
if (is_null_sha1(cmd->new_sha1))
if (is_null_oid(&cmd->new_oid))
continue;
sha1_array_append(ref, cmd->new_sha1);
sha1_array_append(ref, cmd->new_oid.hash);
cmd->index = ref->nr - 1;
}
si->ref = ref;
@ -1830,7 +1830,7 @@ static void update_shallow_info(struct command *commands,
ALLOC_ARRAY(ref_status, ref->nr);
assign_shallow_commits_to_refs(si, NULL, ref_status);
for (cmd = commands; cmd; cmd = cmd->next) {
if (is_null_sha1(cmd->new_sha1))
if (is_null_oid(&cmd->new_oid))
continue;
if (ref_status[cmd->index]) {
cmd->error_string = "shallow update not allowed";
@ -1868,7 +1868,7 @@ static int delete_only(struct command *commands)
{
struct command *cmd;
for (cmd = commands; cmd; cmd = cmd->next) {
if (!is_null_sha1(cmd->new_sha1))
if (!is_null_oid(&cmd->new_oid))
return 0;
}
return 1;