On Wed, Mar 16, 2011 at 12:26 PM, Carlos Martín Nieto <cmn@xxxxxxxx> wrote:
> Make system_path behave like the other path functions by using a
> static buffer, fixing a memory leak.
>
> Also make sure the prefix pointer is always initialized to either
> PREFIX or NULL.
>
> Signed-off-by: Carlos Martín Nieto <cmn@xxxxxxxx>
> ---
>
> This fixes the leak I was trying to fix with my original patch, but
> this seems much cleaner
>
> exec_cmd.c | 9 ++++-----
> 1 files changed, 4 insertions(+), 5 deletions(-)
>
> diff --git a/exec_cmd.c b/exec_cmd.c
> index 38545e8..12ce017 100644
> --- a/exec_cmd.c
> +++ b/exec_cmd.c
> @@ -9,11 +9,11 @@ static const char *argv0_path;
> const char *system_path(const char *path)
> {
> #ifdef RUNTIME_PREFIX
> - static const char *prefix;
> + static const char *prefix = NULL;
> #else
> static const char *prefix = PREFIX;
> #endif
> - struct strbuf d = STRBUF_INIT;
> + static char buf[PATH_MAX+1];
Why PATH_MAX + 1? POSIX says that PATH_MAX includes the null-termination...
> @@ -33,9 +33,8 @@ const char *system_path(const char *path)
> }
> #endif
>
> - strbuf_addf(&d, "%s/%s", prefix, path);
> - path = strbuf_detach(&d, NULL);
> - return path;
> + snprintf(buf, PATH_MAX, "%s/%s", prefix, path);
Perhaps "snprintf(buf, sizeof(buf) - 1, "%s/%s", prefix, path);" instead?
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