Re: [PATCH v2] commit: fix memory-leak

> The name, email and date strings are some times allocated on the
> heap, but not free'd. Fix this by making sure they are allways
> heap-allocated, so we can safely free the memory.
>
> At the same time, this fixes a problem with strict-POSIX getenv
> implementations. POSIX says "The return value from getenv() may
> point to static data which may be overwritten by subsequent calls
> to getenv()", so not duplicating the strings is a potential bug.
>
> Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
> ---
> Fixed typo in commit message, as pointed out by Matthieu Moy.
>
>  builtin/commit.c  |    9 ++++++---
>  git-compat-util.h |    1 +
>  wrapper.c         |    6 ++++++
>  3 files changed, 13 insertions(+), 3 deletions(-)
>
> diff --git a/builtin/commit.c b/builtin/commit.c
> index 03cff5a..e5a649e 100644
> --- a/builtin/commit.c
> +++ b/builtin/commit.c
> @@ -465,9 +465,9 @@ static void determine_author_info(struct strbuf *author_ident)
>  {
>        char *name, *email, *date;
>
> -       name = getenv("GIT_AUTHOR_NAME");
> -       email = getenv("GIT_AUTHOR_EMAIL");
> -       date = getenv("GIT_AUTHOR_DATE");
> +       name = xgetenv("GIT_AUTHOR_NAME");
> +       email = xgetenv("GIT_AUTHOR_EMAIL");
> +       date = xgetenv("GIT_AUTHOR_DATE");
>
>        if (use_message && !renew_authorship) {
>                const char *a, *lb, *rb, *eol;
> @@ -507,6 +507,9 @@ static void determine_author_info(struct strbuf *author_ident)
>                date = force_date;
>        strbuf_addstr(author_ident, fmt_ident(name, email, date,
>                                              IDENT_ERROR_ON_NO_NAME));
> +       free(name);
> +       free(email);
> +       free(date);