diff options
| author | Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo.com> | 2020-03-10 16:11:22 +0300 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2020-03-10 21:41:40 +0300 |
| commit | 3d7747e318532a36a263c61cdf92f2decb6424ff (patch) | |
| tree | 3d00f009afde0dea8008eb7a40b379c9225023e5 /builtin/commit-graph.c | |
| parent | 0915a5b4cdf00a8c6c755b77b854725a183993b4 (diff) | |
real_path: remove unsafe API
Returning a shared buffer invites very subtle bugs due to reentrancy or
multi-threading, as demonstrated by the previous patch.
There was an unfinished effort to abolish this [1].
Let's finally rid of `real_path()`, using `strbuf_realpath()` instead.
This patch uses a local `strbuf` for most places where `real_path()` was
previously called.
However, two places return the value of `real_path()` to the caller. For
them, a `static` local `strbuf` was added, effectively pushing the
problem one level higher:
read_gitfile_gently()
get_superproject_working_tree()
[1] https://lore.kernel.org/git/1480964316-99305-1-git-send-email-bmwill@google.com/
Signed-off-by: Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'builtin/commit-graph.c')
| -rw-r--r-- | builtin/commit-graph.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/builtin/commit-graph.c b/builtin/commit-graph.c index 4a70b33fb5..d1ab6625f6 100644 --- a/builtin/commit-graph.c +++ b/builtin/commit-graph.c @@ -39,14 +39,17 @@ static struct object_directory *find_odb(struct repository *r, { struct object_directory *odb; char *obj_dir_real = real_pathdup(obj_dir, 1); + struct strbuf odb_path_real = STRBUF_INIT; prepare_alt_odb(r); for (odb = r->objects->odb; odb; odb = odb->next) { - if (!strcmp(obj_dir_real, real_path(odb->path))) + strbuf_realpath(&odb_path_real, odb->path, 1); + if (!strcmp(obj_dir_real, odb_path_real.buf)) break; } free(obj_dir_real); + strbuf_release(&odb_path_real); if (!odb) die(_("could not find object directory matching %s"), obj_dir); |