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On 16/09/17 22:16, Junio C Hamano wrote:
> Subject: gc: call fscanf() with %<len>s, not %<len>c, when reading
> hostname
>
> Earlier in this codepath, we (ab)used "%<len>c" to read the
> hostname recorded in the lockfile into locking_host[HOST_NAME_MAX +
> 1] while substituting <len> with the actual value of
> HOST_NAME_MAX.
>
> This turns out to be incorrect, as it an instruction to read
> exactly
it -> it is
> the specified number of bytes. We are trying to read at most that
> many bytes, we should be using "%<len>s" instead.
>
> Helped-by: A. Wilcox <awilfox@xxxxxxxxxxxxxxx> Signed-off-by: Junio
> C Hamano <gitster@xxxxxxxxx> --- builtin/gc.c | 2 +- 1 file
> changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/builtin/gc.c b/builtin/gc.c index
> 3c78fcb9b1..bb2d6c1fb2 100644 --- a/builtin/gc.c +++
> b/builtin/gc.c @@ -258,7 +258,7 @@ static const char
> *lock_repo_for_gc(int force, pid_t* ret_pid) int should_exit;
>
> if (!scan_fmt) - scan_fmt = xstrfmt("%s %%%dc", "%"SCNuMAX,
> HOST_NAME_MAX); + scan_fmt = xstrfmt("%s %%%ds", "%"SCNuMAX,
> HOST_NAME_MAX); fp = fopen(pidfile_path, "r"); memset(locking_host,
> 0, sizeof(locking_host)); should_exit =
>
Ack. This is what I used in my testing; looks great. Thanks so much
for your time and patience.
Sincerely,
- --arw
- --
A. Wilcox (awilfox)
Project Lead, Adélie Linux
http://adelielinux.org
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