sudo-baron-samedit-7.cpp

//sudo_1.8.23-9.el7/plugins/sudoers/sudoers.c
static int
set_cmnd(void)
{
    ...
    if (sudo_mode & (MODE_RUN | MODE_EDIT | MODE_CHECK)) {
        ...
        /* set user_args */
        if (NewArgc > 1) {
            char *to, *from, **av;
            size_t size, n;

            /* Alloc and build up user_args. */
            for (size = 0, av = NewArgv + 1; *av; av++)
                size += strlen(*av) + 1;
[6]         if (size == 0 || (user_args = malloc(size)) == NULL) {
                sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
                debug_return_int(-1);
            }
            if (ISSET(sudo_mode, MODE_SHELL|MODE_LOGIN_SHELL)) {
                /*
                 * When running a command via a shell, the sudo front-end
                 * escapes potential meta chars.  We unescape non-spaces
                 * for sudoers matching and logging purposes.
                 */
[7]              for (to = user_args, av = NewArgv + 1; (from = *av); av++) {
                    while (*from) {
                        if (from[0] == '\\' && !isspace((unsigned char)from[1]))
                            from++;
                        *to++ = *from++;
                    }
                    *to++ = ' ';
                }
                *--to = '\0';
            } else {
                ...
            }
        }
    }
    ...
[8] if (!update_defaults(SETDEF_CMND, false)) {
[9]     log_warningx(SLOG_SEND_MAIL|SLOG_NO_STDERR,
            N_("problem with defaults entries"));
    }

    debug_return_int(ret);
}