samba-mirror/source3/lib/readline.c

/* 
   Unix SMB/Netbios implementation.
   Version 3.0
   Samba readline wrapper implementation
   Copyright (C) Simo Sorce 2001
   Copyright (C) Andrew Tridgell 2001
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"

#ifdef HAVE_NEW_LIBREADLINE
#  define RL_COMPLETION_CAST (rl_completion_func_t *)
#else
/* This type is missing from libreadline<4.0  (approximately) */
#  define RL_COMPLETION_CAST
#endif /* HAVE_NEW_LIBREADLINE */


/****************************************************************************
display the prompt and wait for input. Call callback() regularly
****************************************************************************/
static char *smb_readline_replacement(char *prompt, void (*callback)(void), 
                                      char **(completion_fn)(char *text, 
                                                             int start, 
                                                             int end))
{
	fd_set fds;
	static pstring line;
	struct timeval timeout;
	int fd = fileno(stdin);
        char *ret;

	x_fprintf(dbf, "%s", prompt);
	x_fflush(dbf);

	while (1) {
		timeout.tv_sec = 5;
		timeout.tv_usec = 0;

		FD_ZERO(&fds);
		FD_SET(fd,&fds);
	
		if (sys_select_intr(fd+1,&fds,&timeout) == 1) {
			ret = fgets(line, sizeof(line), stdin);
			return ret;
		}
		if (callback) callback();
	}
}

/****************************************************************************
display the prompt and wait for input. Call callback() regularly
****************************************************************************/
char *smb_readline(char *prompt, void (*callback)(void), 
		   char **(completion_fn)(char *text, int start, int end))
{
#if HAVE_LIBREADLINE
	char *ret;

        /* Aargh!  Readline does bizzare things with the terminal width
           that mucks up expect(1).  Set CLI_NO_READLINE in the environment
           to force readline not to be used. */

        if (getenv("CLI_NO_READLINE"))
                return smb_readline_replacement(prompt, callback, 
                                                completion_fn);

	if (completion_fn) {
		/* The callback prototype has changed slightly between
                   different versions of Readline, so the same function
                   works in all of them to date, but we get compiler
                   warnings in some.  */
		rl_attempted_completion_function = RL_COMPLETION_CAST
			completion_fn;
	}

	if (callback) rl_event_hook = (Function *)callback;
	ret = readline(prompt);
	if (ret && *ret) add_history(ret);
	return ret;
#else
        return smb_readline_replacement(prompt, callback, completion_fn);
#endif
}

/****************************************************************************
history
****************************************************************************/
int cmd_history(void)
{
#if defined(HAVE_LIBREADLINE)
	HIST_ENTRY **hlist;
	int i;

	hlist = history_list();
	
	for (i = 0; hlist && hlist[i]; i++) {
		DEBUG(0, ("%d: %s\n", i, hlist[i]->line));
	}
#else
	DEBUG(0,("no history without readline support\n"));
#endif

	return 0;
}