From: Carlo Arenas <carenas@gmail.com>
Date: Wed, 27 Apr 2022 18:11:37 GMT
Subject: Re: [PATCH] git-compat-util: avoid failing dir ownership checks if running privileged
Message-ID: <CAPUEspgOwmQwqBjauKW=VYJjry3537Te4RLjB=ZuT=CU+rRA4A@mail.gmail.com>
In-Reply-To: <00b501d85a61$74130240$5c3906c0$@nexbridge.com>

On Wed, Apr 27, 2022 at 11:06 AM <rsbecker@nexbridge.com> wrote:
> Results on NonStop: strtol("123456789012345678", &endptr, 10) returns 4294967295 and *endptr == '\0' just beyond the last 8.

Thanks and errno == ERANGE as POSIX requires, right?, the code
(untested) I was planning to use instead looks like :

static inline void extract_id_from_env(const char *env, uid_t *id)
{
        const char *real_uid = getenv(env);

        /* discard any empty values */
        if (real_uid && *real_uid) {
                unsigned long extracted_id;
                int saved_errno = errno;

                errno = 0;
                extracted_id = strtoul(real_uid, NULL, 10);
                if (!errno)
                        *id = (uid_t)extracted_id;
                errno = saved_errno;
        }
        return 0;
}

Carlo