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| author |  Rene Scharfe <l.s.r@web.de> | 2019-02-19 00:05:18 +0000 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2019-04-01 11:57:39 +0900 |
| commit | 3548726cd7f5c5d2d8a1359ac21ae0354bd4c895 (patch) | |
| tree | 871fd7d361c384a02437cbc9b66c3bec2ddc84a5 /builtin | |
| parent | hash: add a function to lookup hash algorithm by length (diff) | |
| download | tgif-3548726cd7f5c5d2d8a1359ac21ae0354bd4c895.tar.xz | |
get-tar-commit-id: parse comment record
Parse pax comment records properly and get rid of magic numbers for
acceptable comment length. This simplifies a later change to handle
longer hashes.
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'builtin')
| -rw-r--r-- | builtin/get-tar-commit-id.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/builtin/get-tar-commit-id.c b/builtin/get-tar-commit-id.c index 2706fcfaf2..312e44ed05 100644 --- a/builtin/get-tar-commit-id.c +++ b/builtin/get-tar-commit-id.c @@ -21,6 +21,8 @@ int cmd_get_tar_commit_id(int argc, const char **argv, const char *prefix) char *content = buffer + RECORDSIZE; const char *comment; ssize_t n; + long len; + char *end; if (argc != 1) usage(builtin_get_tar_commit_id_usage); @@ -32,10 +34,17 @@ int cmd_get_tar_commit_id(int argc, const char **argv, const char *prefix) die_errno("git get-tar-commit-id: EOF before reading tar header"); if (header->typeflag[0] != 'g') return 1; - if (!skip_prefix(content, "52 comment=", &comment)) + + len = strtol(content, &end, 10); + if (errno == ERANGE || end == content || len < 0) + return 1; + if (!skip_prefix(end, " comment=", &comment)) + return 1; + len -= comment - content; + if (len != GIT_SHA1_HEXSZ + 1) return 1; - if (write_in_full(1, comment, 41) < 0) + if (write_in_full(1, comment, len) < 0) die_errno("git get-tar-commit-id: write error"); return 0; |