Function uid_determine

exec/coroparse.c:140–192

static char error_string_response[512];

static int uid_determine (const char *req_user)
{
	int pw_uid = 0;
	struct passwd passwd;
	struct passwd* pwdptr = &passwd;
	struct passwd* temp_pwd_pt;
	char *pwdbuffer;
	int  pwdlinelen, rc;
	long int id;
	char *ep;

	id = strtol(req_user, &ep, 10);
	if (*req_user != '\0' && *ep == '\0' && id >= 0 && id <= UINT_MAX) {
		return (id);
	}

	pwdlinelen = sysconf (_SC_GETPW_R_SIZE_MAX);

	if (pwdlinelen == -1) {
	        pwdlinelen = 256;
	}

	pwdbuffer = malloc (pwdlinelen);

	while ((rc = getpwnam_r (req_user, pwdptr, pwdbuffer, pwdlinelen, &temp_pwd_pt)) == ERANGE) {
		char *n;

		pwdlinelen *= 2;
		if (pwdlinelen <= 32678) {
			n = realloc (pwdbuffer, pwdlinelen);
			if (n != NULL) {
				pwdbuffer = n;
				continue;
			}
		}
	}
	if (rc != 0) {
		free (pwdbuffer);
	        sprintf (error_string_response, "getpwnam_r(): %s", strerror(rc));
	        return (-1);
	}
	if (temp_pwd_pt == NULL) {
		free (pwdbuffer);
	        sprintf (error_string_response,
	                "The '%s' user is not found in /etc/passwd, please read the documentation.",
	                req_user);
	        return (-1);
	}
	pw_uid = passwd.pw_uid;
	free (pwdbuffer);

	return pw_uid;
}

static int gid_determine (const char *req_group)
{