diff options
| -rw-r--r-- | commit.c | 28 | ||||
| -rwxr-xr-x | t/t4212-log-corrupt.sh | 41 |
2 files changed, 67 insertions, 2 deletions
@@ -116,10 +116,34 @@ static timestamp_t parse_commit_date(const char *buf, const char *tail) dateptr = eol; while (dateptr > buf && dateptr[-1] != '>') dateptr--; - if (dateptr == buf || dateptr == eol) + if (dateptr == buf) return 0; - /* dateptr < eol && *eol == '\n', so parsing will stop at eol */ + /* + * Trim leading whitespace, but make sure we have at least one + * non-whitespace character, as parse_timestamp() will otherwise walk + * right past the newline we found in "eol" when skipping whitespace + * itself. + * + * In theory it would be sufficient to allow any character not matched + * by isspace(), but there's a catch: our isspace() does not + * necessarily match the behavior of parse_timestamp(), as the latter + * is implemented by system routines which match more exotic control + * codes, or even locale-dependent sequences. + * + * Since we expect the timestamp to be a number, we can check for that. + * Anything else (e.g., a non-numeric token like "foo") would just + * cause parse_timestamp() to return 0 anyway. + */ + while (dateptr < eol && isspace(*dateptr)) + dateptr++; + if (!isdigit(*dateptr) && *dateptr != '-') + return 0; + + /* + * We know there is at least one digit (or dash), so we'll begin + * parsing there and stop at worst case at eol. + */ return parse_timestamp(dateptr, NULL, 10); } diff --git a/t/t4212-log-corrupt.sh b/t/t4212-log-corrupt.sh index af4b35ff56..85e90acb09 100755 --- a/t/t4212-log-corrupt.sh +++ b/t/t4212-log-corrupt.sh @@ -92,4 +92,45 @@ test_expect_success 'absurdly far-in-future date' ' git log -1 --format=%ad $commit ' +test_expect_success 'create commits with whitespace committer dates' ' + # It is important that this subject line is numeric, since we want to + # be sure we are not confused by skipping whitespace and accidentally + # parsing the subject as a timestamp. + # + # Do not use munge_author_date here. Besides not hitting the committer + # line, it leaves the timezone intact, and we want nothing but + # whitespace. + # + # We will make two munged commits here. The first, ws_commit, will + # be purely spaces. The second contains a vertical tab, which is + # considered a space by strtoumax(), but not by our isspace(). + test_commit 1234567890 && + git cat-file commit HEAD >commit.orig && + sed "s/>.*/> /" <commit.orig >commit.munge && + ws_commit=$(git hash-object --literally -w -t commit commit.munge) && + sed "s/>.*/> $(printf "\013")/" <commit.orig >commit.munge && + vt_commit=$(git hash-object --literally -w -t commit commit.munge) +' + +test_expect_success '--until treats whitespace date as sentinel' ' + echo $ws_commit >expect && + git rev-list --until=1980-01-01 $ws_commit >actual && + test_cmp expect actual && + + echo $vt_commit >expect && + git rev-list --until=1980-01-01 $vt_commit >actual && + test_cmp expect actual +' + +test_expect_success 'pretty-printer handles whitespace date' ' + # as with the %ad test above, we will show these as the empty string, + # not the 1970 epoch date. This is intentional; see 7d9a281941 (t4212: + # test bogus timestamps with git-log, 2014-02-24) for more discussion. + echo : >expect && + git log -1 --format="%at:%ct" $ws_commit >actual && + test_cmp expect actual && + git log -1 --format="%at:%ct" $vt_commit >actual && + test_cmp expect actual +' + test_done |