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/* Readline routines */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <termios.h>
#include <readline/readline.h>
#include <readline/history.h>


static struct termios tty, old_tty;
static unsigned char *line_read = (unsigned char*)NULL;
static unsigned char *deftext;


int set_echo(void)
{
    /* If ECHO was previously off, we need to turn it on  */
    /* temporarily to make readline display the characters */

    tcgetattr(STDIN_FILENO, &tty);
    if (! (tty.c_lflag & ECHO)) {
	old_tty = tty;
	tty.c_lflag |= ECHO; 
	tcsetattr(STDIN_FILENO, TCSANOW, &tty);
	return 1;
    }
    return 0;
}

int set_deftext(void)
{
    if (deftext) {
	rl_insert_text (deftext);
	deftext = (unsigned char*)NULL;
	rl_startup_hook = (Function *)NULL;
    }
}

unsigned char *rl_gets(unsigned char *pmt, unsigned char *dflt)
{
    int tty_changed;

    tty_changed = set_echo();

    if (line_read) {
	free(line_read);
	line_read = (unsigned char*)NULL;
    }

    if (dflt != NULL) {
	deftext = dflt;
	rl_startup_hook = set_deftext;
    }

    line_read = readline(pmt);

    if (tty_changed)
	tcsetattr(STDIN_FILENO, TCSANOW, &old_tty);

    return (line_read);
}
.

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