Maintanance improvement

[DevManu-de]

While working on the psh flags I think that it makes sense to combine

        expanded_ps1 = ps_expander(state, psh_vf_getstr(state, "PS1"));
        stat = read_cmdline(state, expanded_ps1, &buffer);
        xfree(expanded_ps1);
        if (stat == 1)
        {
            puts("");
            exit_psh(state, psh_vf_getint(state, "?"));
        }
        if (stat < 0)
            continue;
        cmd = new_command();
        stat = filpinfo(state, expand_alias(state, buffer), cmd);
        xfree(buffer);
        if (stat < 0)
        {
            free_command(cmd);
            continue;
        }
        psh_backend_do_run(state, cmd);
        free_command(cmd);

to a function. This would remove the douplicate code between main.c and args.c -c flag and therefore be easier to maintain and make implementing new features faster.
I thought of a function like print_exec_command(psh_state *state, char *buffer) that prints the output to stdout
and / or a function like get_exec_command(psh_state *state, char *buffer) that returns the output.
Before making any greater changes I wanted to hear your opinion on this.