/****************************************************************************
 *
 *  $Id: linphonec.c,v 1.57 2007/11/14 13:40:27 smorlat Exp $
 *
 *  Copyright (C) 2006  Sandro Santilli <strk@keybit.net>
 *  Copyright (C) 2002  Florian Winterstein <flox@gmx.net>
 *  Copyright (C) 2000  Simon MORLAT <simon.morlat@free.fr>
 *
 ****************************************************************************
 *
 *  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 Library 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 ****************************************************************************/

#include <errno.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <limits.h>
#include <linphonecore.h>
#include "linphonec.h"

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#ifdef HAVE_GETTEXT
#include <libintl.h>
#ifndef _
#define _(String) gettext(String)
#endif
#else
#define _(something)	(something)
#endif

/***************************************************************************
 *
 *  Types
 *
 ***************************************************************************/

typedef struct {
	LinphoneAuthInfo *elem[MAX_PENDING_AUTH];
	int nitems;
} LPC_AUTH_STACK;

/***************************************************************************
 *
 *  Forward declarations 
 *
 ***************************************************************************/

char *lpc_strip_blanks(char *input);

static int handle_configfile_migration(void);
static int copy_file(const char *from, const char *to);
static int linphonec_parse_cmdline(int argc, char **argv);
static int linphonec_initialize_readline(void);
static int linphonec_finish_readline();
static int linphonec_init(int argc, char **argv);
static int linphonec_main_loop (LinphoneCore * opm, char * sipAddr);
static int linphonec_idle_call (void);
static char **linephonec_readline_completion(const char *text,
	int start, int end);

/* These are callback for linphone core */
static void linphonec_call_received(LinphoneCore *lc, const char *from);
static void linphonec_prompt_for_auth(LinphoneCore *lc, const char *realm,
	const char *username);
static void linphonec_display_something (LinphoneCore * lc, const char *something);
static void linphonec_display_url (LinphoneCore * lc, const char *something, const char *url);
static void linphonec_display_warning (LinphoneCore * lc, const char *something);
static void stub () {}
static void linphonec_notify_received(LinphoneCore *lc,LinphoneFriend *fid,
		const char *from, const char *status, const char *img);
static void linphonec_new_unknown_subscriber(LinphoneCore *lc,
		LinphoneFriend *lf, const char *url);
static void linphonec_bye_received(LinphoneCore *lc, const char *from);
static void linphonec_text_received(LinphoneCore *lc, LinphoneChatRoom *cr,
		const char *from, const char *msg);
static void linphonec_display_status (LinphoneCore * lc, const char *something);
static void linphonec_general_state (LinphoneCore * lc, LinphoneGeneralState *gstate);
static void print_prompt(LinphoneCore *opm);

/***************************************************************************
 *
 * Global variables 
 *
 ***************************************************************************/

LinphoneCore linphonec;
FILE *mylogfile;
static char *histfile_name=NULL;
static char last_in_history[256];
//auto answer (-a) option
static bool_t auto_answer=FALSE;
static bool_t answer_call=FALSE;
static bool_t vcap_enabled=FALSE;
static bool_t display_enabled=FALSE;
static bool_t show_general_state=FALSE;
LPC_AUTH_STACK auth_stack;
static int trace_level = 0;
static char *logfile_name = NULL;
static char configfile_name[PATH_MAX];
static char *sipAddr = NULL; /* for autocall */
char prompt[PROMPT_MAX_LEN];

LinphoneCoreVTable linphonec_vtable = {
	show:(ShowInterfaceCb) stub,
	inv_recv: linphonec_call_received,
	bye_recv: linphonec_bye_received, 
	notify_recv: linphonec_notify_received,
	new_unknown_subscriber: linphonec_new_unknown_subscriber,
	auth_info_requested: linphonec_prompt_for_auth,
	display_status:linphonec_display_status,
	display_message:linphonec_display_something,
#ifdef VINCENT_MAURY_RSVP
	/* the yes/no dialog box */
	display_yes_no: (DisplayMessageCb) stub,
#endif
	display_warning:linphonec_display_warning,
	display_url:linphonec_display_url,
	display_question:(DisplayQuestionCb)stub,
	text_received:linphonec_text_received,
        general_state:linphonec_general_state
};

/***************************************************************************
 *
 * Linphone core callbacks
 *
 ***************************************************************************/

/*
 * Linphone core callback 
 */
static void
linphonec_display_something (LinphoneCore * lc, const char *something)
{
	fprintf (stdout, "%s\n%s", something,prompt);
	fflush(stdout);
}

/*
 * Linphone core callback 
 */
static void
linphonec_display_status (LinphoneCore * lc, const char *something)
{
	fprintf (stdout, "%s\n%s", something,prompt);
	fflush(stdout);
}

/*
 * Linphone core callback 
 */
static void
linphonec_display_warning (LinphoneCore * lc, const char *something)
{
	fprintf (stdout, "Warning: %s\n%s", something,prompt);
	fflush(stdout);
}

/*
 * Linphone core callback 
 */
static void
linphonec_display_url (LinphoneCore * lc, const char *something, const char *url)
{
	fprintf (stdout, "%s : %s\n", something, url);
}


/*
 * Linphone core callback 
 */
static void
linphonec_call_received(LinphoneCore *lc, const char *from)
{
	if ( auto_answer)  {
		answer_call=TRUE;
	}
}

/*
 * Linphone core callback 
 */
static void
linphonec_prompt_for_auth(LinphoneCore *lc, const char *realm, const char *username)
{
	LinphoneAuthInfo *pending_auth;

	if ( auth_stack.nitems+1 > MAX_PENDING_AUTH )
	{
		fprintf(stderr,
			"Can't accept another authentication request.\n"
			"Consider incrementing MAX_PENDING_AUTH macro.\n");
		return;
	} 

	pending_auth=linphone_auth_info_new(username,NULL,NULL,NULL,realm);
	auth_stack.elem[auth_stack.nitems++]=pending_auth;
	
}

/*
 * Linphone core callback
 */
static void
linphonec_notify_received(LinphoneCore *lc,LinphoneFriend *fid,
		const char *from, const char *status, const char *img)
{
	printf("Friend %s is %s\n", from, status);
	// todo: update Friend list state (unimplemented)
}

/*
 * Linphone core callback
 */
static void
linphonec_new_unknown_subscriber(LinphoneCore *lc, LinphoneFriend *lf,
		const char *url)
{
	printf("Friend %s requested subscription "
		"(accept/deny is not implemented yet)\n", url); 
	// This means that this person wishes to be notified 
	// of your presence information (online, busy, away...).

}

/*
 * Linphone core callback
 */
static void
linphonec_bye_received(LinphoneCore *lc, const char *from)
{
	// Should change prompt back to original maybe

	// printing this is unneeded as we'd get a "Communication ended"
	// message trough display_status callback anyway
	//printf("Bye received from %s\n", from);
}

/*
 * Linphone core callback
 */
static void
linphonec_text_received(LinphoneCore *lc, LinphoneChatRoom *cr,
		const char *from, const char *msg)
{
	printf("%s: %s\n", from, msg);
	// TODO: provide mechanism for answering.. ('say' command?)
}


static void 
linphonec_general_state (LinphoneCore * lc, LinphoneGeneralState *gstate)
{
        if (show_general_state) {
          switch(gstate->new_state) {
           case GSTATE_POWER_OFF:
             printf("GSTATE_POWER_OFF");
             break;
           case GSTATE_POWER_STARTUP:
             printf("GSTATE_POWER_STARTUP");
             break;
           case GSTATE_POWER_ON:
             printf("GSTATE_POWER_ON");
             break;
           case GSTATE_POWER_SHUTDOWN:
             printf("GSTATE_POWER_SHUTDOWN");
             break;
           case GSTATE_REG_NONE:
             printf("GSTATE_REG_NONE");
             break;
           case GSTATE_REG_OK:
             printf("GSTATE_REG_OK");
             break;
           case GSTATE_REG_FAILED:
             printf("GSTATE_REG_FAILED");
             break;
           case GSTATE_CALL_IDLE:
             printf("GSTATE_CALL_IDLE");
             break;
           case GSTATE_CALL_OUT_INVITE:
             printf("GSTATE_CALL_OUT_INVITE");
             break;
           case GSTATE_CALL_OUT_CONNECTED:
             printf("GSTATE_CALL_OUT_CONNECTED");
             break;
           case GSTATE_CALL_IN_INVITE:
             printf("GSTATE_CALL_IN_INVITE");
             break;
           case GSTATE_CALL_IN_CONNECTED:
             printf("GSTATE_CALL_IN_CONNECTED");
             break;
           case GSTATE_CALL_END:
             printf("GSTATE_CALL_END");
             break;
           case GSTATE_CALL_ERROR:
             printf("GSTATE_CALL_ERROR");
             break;
           default:
              printf("GSTATE_UNKNOWN_%d",gstate->new_state);   
          }
          if (gstate->message) printf(" %s", gstate->message);
          printf("\n");
        }  
}


/***************************************************************************/
/*
 * Main
 *
 * Use globals:
 *
 *	- char *histfile_name
 *	- FILE *mylogfile
 */
int
main (int argc, char *argv[])
{

	if (! linphonec_init(argc, argv) ) exit(EXIT_FAILURE);

	linphonec_main_loop (&linphonec, sipAddr);

	linphonec_finish(EXIT_SUCCESS);

	exit(EXIT_SUCCESS); /* should never reach here */
}

/*
 * Initialize linphonec
 */
static int
linphonec_init(int argc, char **argv)
{

	//g_mem_set_vtable(&dbgtable);

	/*
	 * Set initial values for global variables
	 */
	mylogfile = NULL;
	snprintf(configfile_name, PATH_MAX, "%s/.linphonerc",
		getenv("HOME"));


	/* Handle configuration filename changes */
	switch (handle_configfile_migration())
	{
		case -1: /* error during file copies */
			fprintf(stderr,
				"Error in configuration file migration\n");
			break;

		case 0: /* nothing done */
		case 1: /* migrated */
		default:
			break;
	}

#ifdef ENABLE_NLS
	if (NULL == bindtextdomain (GETTEXT_PACKAGE, PACKAGE_LOCALE_DIR))
		perror ("bindtextdomain failed");
#ifndef __ARM__
	bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
#endif
	textdomain (GETTEXT_PACKAGE);
#else
	printf ("NLS disabled.\n");
#endif

	linphonec_parse_cmdline(argc, argv);

	if (trace_level > 0)
	{
		if (logfile_name != NULL)
			mylogfile = fopen (logfile_name, "w+");

		if (mylogfile == NULL)
		{
			mylogfile = stdout;
			fprintf (stderr,
				 "INFO: no logfile, logging to stdout\n");
		}
		linphone_core_enable_logs(mylogfile);
	}
	else
	{
		linphone_core_disable_logs();
	}
	/*
	 * Initialize auth stack
	 */
	auth_stack.nitems=0;

	/*
	 * Initialize linphone core
	 */
	linphone_core_init (&linphonec, &linphonec_vtable, configfile_name,
			    NULL);
	linphone_core_enable_video(&linphonec,vcap_enabled,display_enabled);
	if (!(vcap_enabled || display_enabled)) printf("Warning: video is disabled in linphonec.\n");
	/*
	 * Initialize readline
	 */
	linphonec_initialize_readline();

	/*
	 * Initialize signal handlers
	 */
	signal(SIGTERM, linphonec_finish); 
	signal(SIGINT, linphonec_finish); 

	return 1;
}


/*
 * Close linphonec, cleanly terminating
 * any pending call
 */
void
linphonec_finish(int exit_status)
{
	printf("Terminating...\n");

	/* Terminate any pending call */
   	linphonec_parse_command_line(&linphonec, "terminate");

	linphonec_finish_readline();

	linphone_core_uninit (&linphonec);

	if (mylogfile != NULL && mylogfile != stdout)
	{
		fclose (mylogfile);
	}

	exit(exit_status);

}

/*
 * This is called from idle_call() whenever
 * pending_auth != NULL.
 *
 * It prompts user for a password.
 * Hitting ^D (EOF) would make this function 
 * return 0 (Cancel).
 * Any other input would try to set linphone core
 * auth_password for the pending_auth, add the auth_info
 * and return 1.
 */
int
linphonec_prompt_for_auth_final(LinphoneCore *lc)
{
	char *input, *iptr;
	char auth_prompt[256];
	rl_hook_func_t *old_event_hook;

	LinphoneAuthInfo *pending_auth=auth_stack.elem[auth_stack.nitems-1];

	snprintf(auth_prompt, 256, "Password for %s on %s: ",
		pending_auth->username, pending_auth->realm);

	printf("\n");

	/*
	 * Disable event hook to avoid entering an
	 * infinite loop. This would prevent idle_call
	 * from being called during authentication reads.
	 * Note that it might be undesiderable...
	 */
	old_event_hook=rl_event_hook;
	rl_event_hook=NULL;

	while (1)
	{
		input=readline(auth_prompt);

		/*
		 * If EOF (^D) is sent you probably don't want
		 * to provide an auth password... should give up
		 * the operation, but there's no mechanism to
		 * send this info back to caller currently...
		 */
		if ( ! input )
		{
			printf("Cancel requested, but not implemented.\n"); 
			continue;
		}

		/* Strip blanks */
		iptr=lpc_strip_blanks(input);

		/*
		 * Only blanks, continue asking
		 */
		if ( ! *iptr )
		{
			free(input);
			continue;
		}

		/* Something typed, let's try */
		break;
	}

	/*
	 * No check is done here to ensure password is correct.
	 * I guess password will be asked again later.
	 */
	linphone_auth_info_set_passwd(pending_auth, input);
	linphone_core_add_auth_info(lc, pending_auth);
	--(auth_stack.nitems);

	/*
	 * Reset line_buffer, to avoid the password
	 * to be used again from outer readline
	 */
	rl_line_buffer[0]='\0';

	rl_event_hook=old_event_hook;

	return 1;
}

void
print_usage (int exit_status)
{
	fprintf (stdout, "\n\
usage: linphonec [-c file] [-s sipaddr] [-a] [-V] [-d level ] [-l logfile]\n\
       linphonec -v\n\
\n\
  -c  file             specify path of configuration file.\n\
  -d  level            be verbose. 0 is no output. 6 is all output\n\
  -l  logfile          specify the log file for your SIP phone\n\
  -s  sipaddress       specify the sip call to do at startup\n\
  -a                   enable auto answering for incoming calls\n\
  -V                   enable video features globally (disabled by default)\n\
  -C                   enable video capture only (disabled by default)\n\
  -D                   enable video display only (disabled by default)\n\
  -S                   show general state messages (disabled by default)\n\
  -v or --version      display version and exits.\n");

  	exit(exit_status);
}


/*
 *
 * Called every second from main read loop.
 *
 * Will use the following globals:
 *
 *  - LinphoneCore linphonec
 *  - LPC_AUTH_STACK auth_stack;
 *
 */
static int
linphonec_idle_call ()
{
	LinphoneCore *opm=&linphonec;

	/* Uncomment the following to verify being called */
	/* printf(".\n"); */

	linphone_core_iterate(opm);
	if (answer_call){
		fprintf (stdout, "-------auto answering to call-------\n" );
		linphone_core_accept_call(opm,NULL);
		answer_call=FALSE;
	}

#if 0 /* Automatic exit should be requested with a command line switch */
	/* Quit if autocall mode was on and no call is in progress */
	if ( sipAddr != NULL && opm->call == NULL )
	{
   		linphonec_parse_command_line(&linphonec, "quit");
	}
#endif

	if ( auth_stack.nitems )
	{
		/*
		 * Inhibit command completion
		 * during password prompts
		 */
		rl_inhibit_completion=1;
		linphonec_prompt_for_auth_final(opm);
		rl_inhibit_completion=0;
	}

	return 0;
}

/*
 * Use globals:
 *
 *	- char *histfile_name (also sets this)
 *      - char *last_in_history (allocates it)
 */
static int
linphonec_initialize_readline()
{
	/*rl_bind_key('\t', rl_insert);*/

	/* Allow conditional parsing of ~/.inputrc */
	rl_readline_name = "linphonec";

	/* Call idle_call() every second */
	rl_set_keyboard_input_timeout(LPC_READLINE_TIMEOUT); 
	rl_event_hook=linphonec_idle_call;

	/* Set history file and read it */
	histfile_name = ms_strdup_printf ("%s/.linphonec_history",
		getenv("HOME"));
	read_history(histfile_name);

	/* Initialized last_in_history cache*/
	last_in_history[0] = '\0';

	/* Register a completion function */
	rl_attempted_completion_function = linephonec_readline_completion;

	/* printf("Readline initialized.\n"); */
        setlinebuf(stdout); 
	return 0;
}

/*
 * Uses globals:
 *
 *	- char *histfile_name (writes history to file and frees it)
 *	- char *last_in_history (frees it)
 *
 */
static int
linphonec_finish_readline()
{

	stifle_history(HISTSIZE);
	write_history(histfile_name);
	free(histfile_name);
	histfile_name=NULL;
	return 0;
}

static void print_prompt(LinphoneCore *opm){
#ifdef IDENTITY_AS_PROMPT
	snprintf(prompt, PROMPT_MAX_LEN, "%s> ",
		linphone_core_get_primary_contact(opm));
#else
	snprintf(prompt, PROMPT_MAX_LEN, "linphonec> ");
#endif
}

static int
linphonec_main_loop (LinphoneCore * opm, char * sipAddr)
{
	char buf[LINE_MAX_LEN]; /* auto call handling */
	bool_t run=TRUE;
	char *input;

	print_prompt(opm);


	/* auto call handling */
	if (sipAddr != NULL )
	{
		snprintf (buf, sizeof(buf),"call %s", sipAddr);
		run=linphonec_parse_command_line(&linphonec, buf);
	}

	while ((input=readline(prompt)))
	{
		char *iptr; /* input and input pointer */
		size_t input_len;

		/* Strip blanks */
		iptr=lpc_strip_blanks(input);

		input_len = strlen(iptr);

		/*
		 * Do nothing but release memory
		 * if only blanks are read
		 */
		if ( ! input_len )
		{
			free(input);
			continue;
		}


		/*
		 * Only add to history if not already
		 * last item in it
		 */
		if ( strcmp(last_in_history, iptr) )
		{
			strncpy(last_in_history,iptr,sizeof(last_in_history));
			last_in_history[sizeof(last_in_history)-1]='\0';
			add_history(iptr);
		}

		linphonec_parse_command_line(&linphonec, iptr);
		free(input);
	}

	return 0;
}

/*
 *  Parse command line switches
 *
 *  Use globals:
 *
 *	- int trace_level
 *	- char *logfile_name
 *	- char *configfile_name
 *	- char *sipAddr
 */
static int
linphonec_parse_cmdline(int argc, char **argv)
{
	int arg_num=1;

	while (arg_num < argc)
	{
		int old_arg_num = arg_num;
		if (strncmp ("-d", argv[arg_num], 2) == 0)
		{
			arg_num++;
			if (arg_num < argc)
				trace_level = atoi (argv[arg_num]);
			else
				trace_level = 1;
		}
		else if (strncmp ("-l", argv[arg_num], 2) == 0)
		{
			arg_num++;
			if (arg_num < argc)
				logfile_name = argv[arg_num];
		}
		else if (strncmp ("-c", argv[arg_num], 2) == 0)
		{
			if ( ++arg_num >= argc ) print_usage(EXIT_FAILURE);

			if (access(argv[arg_num],F_OK)!=0 )
			{
				fprintf (stderr,
					"Cannot open config file %s.\n",
					 argv[arg_num]);
				exit(EXIT_FAILURE);
			}
			snprintf(configfile_name, PATH_MAX, argv[arg_num]);
		}
		else if (strncmp ("-s", argv[arg_num], 2) == 0)
		{
			arg_num++;
			if (arg_num < argc)
				sipAddr = argv[arg_num];
		}
                else if (strncmp ("-a", argv[arg_num], 2) == 0)
                {
                        auto_answer = TRUE;
                }
		else if (strncmp ("-C", argv[arg_num], 2) == 0)
                {
                        vcap_enabled = TRUE;
                }
		else if (strncmp ("-D", argv[arg_num], 2) == 0)
                {
                        display_enabled = TRUE;
                }
		else if (strncmp ("-V", argv[arg_num], 2) == 0)
                {
                        display_enabled = TRUE;
			vcap_enabled = TRUE;
                }
		else if ((strncmp ("-v", argv[arg_num], 2) == 0)
			 ||
			 (strncmp
			  ("--version", argv[arg_num],
			   strlen ("--version")) == 0))
		{
			printf ("version: " LINPHONE_VERSION "\n");
			exit (EXIT_SUCCESS);
		}
		else if (strncmp ("-S", argv[arg_num], 2) == 0)
		{
			show_general_state = TRUE;
		}
		else if (old_arg_num == arg_num)
		{
			fprintf (stderr, "ERROR: bad arguments\n");
			print_usage (EXIT_FAILURE);
		}
		arg_num++;
	}

	return 1;
}

/*
 * Up to version 1.2.1 linphone used ~/.linphonec for
 * CLI and ~/.gnome2/linphone for GUI as configuration file.
 * In newer version both interfaces will use ~/.linphonerc.
 *
 * This function helps transparently migrating from one
 * to the other layout using the following heuristic:
 *
 *	IF new_config EXISTS => do nothing
 *	ELSE IF old_cli_config EXISTS => copy to new_config
 *	ELSE IF old_gui_config EXISTS => copy to new_config
 *
 * Returns:
 *	 0 if it did nothing
 *	 1 if it migrated successfully
 *	-1 on error 
 */
static int
handle_configfile_migration()
{
	char *old_cfg_gui;
	char *old_cfg_cli; 
	char *new_cfg;
	const char *home = getenv("HOME");

	new_cfg = ms_strdup_printf("%s/.linphonerc", home);

	/*
	 * If the *NEW* configuration already exists
	 * do nothing.
	 */
	if (access(new_cfg,F_OK)==0)
	{
		free(new_cfg);
		return 0;
	}

	old_cfg_cli = ms_strdup_printf("%s/.linphonec", home);

	/*
	 * If the *OLD* CLI configurations exist copy it to
	 * the new file and make it a symlink.
	 */
	if (access(old_cfg_cli, F_OK)==0)
	{
		if ( ! copy_file(old_cfg_cli, new_cfg) )
		{
			free(old_cfg_cli);
			free(new_cfg);
			return -1;
		}
		printf("%s copied to %s\n", old_cfg_cli, new_cfg);
		free(old_cfg_cli);
		free(new_cfg);
		return 1;
	}

	free(old_cfg_cli);
	old_cfg_gui = ms_strdup_printf("%s/.gnome2/linphone", home);

	/*
	 * If the *OLD* GUI configurations exist copy it to
	 * the new file and make it a symlink.
	 */
	if (access(old_cfg_gui, F_OK)==0)
	{
		if ( ! copy_file(old_cfg_gui, new_cfg) )
		{
			exit(EXIT_FAILURE);
			free(old_cfg_gui);
			free(new_cfg);
			return -1;
		}
		printf("%s copied to %s\n", old_cfg_gui, new_cfg);
		free(old_cfg_gui);
		free(new_cfg);
		return 1;
	}

	free(old_cfg_gui);
	free(new_cfg);
	return 0;
}

/*
 * Copy file "from" to file "to".
 * Destination file is truncated if existing.
 * Return 1 on success, 0 on error (printing an error).
 */
static int
copy_file(const char *from, const char *to)
{
	char message[256];
	FILE *in, *out;
	char buf[256];
	size_t n;

	/* Open "from" file for reading */
	in=fopen(from, "r");
	if ( in == NULL )
	{
		snprintf(message, 255, "Can't open %s for reading: %s\n",
			from, strerror(errno));
		fprintf(stderr, message);
		return 0;
	}

	/* Open "to" file for writing (will truncate existing files) */
	out=fopen(to, "w");
	if ( out == NULL )
	{
		snprintf(message, 255, "Can't open %s for writing: %s\n",
			to, strerror(errno));
		fprintf(stderr, message);
		return 0;
	}

	/* Copy data from "in" to "out" */
	while ( (n=fread(buf, 1, sizeof buf, in)) > 0 )
	{
		if ( ! fwrite(buf, 1, n, out) )
		{
			return 0;
		}
	} 

	fclose(in);
	fclose(out);

	return 1;
}

static char **
linephonec_readline_completion(const char *text, int start, int end)
{
	char **matches = NULL;

	/*
	 * Prevent readline from falling
	 * back to filename-completion
	 */
	rl_attempted_completion_over=1;

	/*
	 * If this is the start of line we complete with commands
	 */
	if ( ! start )
	{
		return rl_completion_matches(text, linphonec_command_generator);
	}

	/*
	 * Otherwise, we should peek at command name
	 * or context to implement a smart completion.
	 * For example: "call .." could return
	 * friends' sip-uri as matches
	 */

	return matches;
}

/*
 * Strip blanks from a string.
 * Return a pointer into the provided string.
 * Modifies input adding a NULL at first
 * of trailing blanks.
 */
char *
lpc_strip_blanks(char *input)
{
	char *iptr;

	/* Find first non-blank */
	while(*input && isspace(*input)) ++input;

	/* Find last non-blank */
	iptr=input+strlen(input);
	if (iptr > input) {
		while(isspace(*--iptr));
		*(iptr+1)='\0';
	}

	return input;
}

/****************************************************************************
 *
 * $Log: linphonec.c,v $
 * Revision 1.57  2007/11/14 13:40:27  smorlat
 * fix --disable-video build.
 *
 * Revision 1.56  2007/09/26 14:07:27  fixkowalski
 * - ANSI/C++ compilation issues with non-GCC compilers
 * - Faster epm-based packaging
 * - Ability to build & run on FC6's eXosip/osip
 *
 * Revision 1.55  2007/09/24 16:01:58  smorlat
 * fix bugs.
 *
 * Revision 1.54  2007/08/22 14:06:11  smorlat
 * authentication bugs fixed.
 *
 * Revision 1.53  2007/02/13 21:31:01  smorlat
 * added patch for general state.
 * new doxygen for oRTP
 * gtk-doc removed.
 *
 * Revision 1.52  2007/01/10 14:11:24  smorlat
 * add --video to linphonec.
 *
 * Revision 1.51  2006/08/21 12:49:59  smorlat
 * merged several little patches.
 *
 * Revision 1.50  2006/07/26 08:17:28  smorlat
 * fix bugs.
 *
 * Revision 1.49  2006/07/17 18:45:00  smorlat
 * support for several event queues in ortp.
 * glib dependency removed from coreapi/ and console/
 *
 * Revision 1.48  2006/04/09 12:45:32  smorlat
 * linphonec improvements.
 *
 * Revision 1.47  2006/04/04 08:04:34  smorlat
 * switched to mediastreamer2, most bugs fixed.
 *
 * Revision 1.46  2006/03/16 17:17:40  smorlat
 * fix various bugs.
 *
 * Revision 1.45  2006/03/12 21:48:31  smorlat
 * gcc-2.95 compile error fixed.
 * mediastreamer2 in progress
 *
 * Revision 1.44  2006/03/04 11:17:10  smorlat
 * mediastreamer2 in progress.
 *
 * Revision 1.43  2006/02/13 09:50:50  strk
 * fixed unused variable warning.
 *
 * Revision 1.42  2006/02/02 15:39:18  strk
 * - Added 'friend list' and 'friend call' commands
 * - Allowed for multiple DTFM send in a single line
 * - Added status-specific callback (bare version)
 *
 * Revision 1.41  2006/02/02 13:30:05  strk
 * - Padded vtable with missing callbacks
 *   (fixing a segfault on friends subscription)
 * - Handled friends notify (bare version)
 * - Handled text messages receive (bare version)
 * - Printed message on subscription request (bare version)
 *
 * Revision 1.40  2006/01/26 09:48:05  strk
 * Added limits.h include
 *
 * Revision 1.39  2006/01/26 02:11:01  strk
 * Removed unused variables, fixed copyright date
 *
 * Revision 1.38  2006/01/25 18:33:02  strk
 * Removed the -t swich, terminate_on_close made the default behaviour
 *
 * Revision 1.37  2006/01/20 14:12:34  strk
 * Added linphonec_init() and linphonec_finish() functions.
 * Handled SIGINT and SIGTERM to invoke linphonec_finish().
 * Handling of auto-termination (-t) moved to linphonec_finish().
 * Reworked main (input read) loop to not rely on 'terminate'
 * and 'run' variable (dropped). configfile_name allocated on stack
 * using PATH_MAX limit. Changed print_usage signature to allow
 * for an exit_status specification.
 *
 * Revision 1.36  2006/01/18 09:25:32  strk
 * Command completion inhibited in proxy addition and auth request prompts.
 * Avoided use of readline's internal filename completion.
 *
 * Revision 1.35  2006/01/14 13:29:32  strk
 * Reworked commands interface to use a table structure,
 * used by command line parser and help function.
 * Implemented first level of completion (commands).
 * Added notification of invalid "answer" and "terminate"
 * commands (no incoming call, no active call).
 * Forbidden "call" intialization when a call is already active.
 * Cleaned up all commands, adding more feedback and error checks.
 *
 * Revision 1.34  2006/01/13 13:00:29  strk
 * Added linphonec.h. Code layout change (added comments, forward decl,
 * globals on top, copyright notices and Logs). Handled out-of-memory
 * condition on history management. Removed assumption on sizeof(char).
 * Fixed bug in authentication prompt (introduced by readline).
 * Added support for multiple authentication requests (up to MAX_PENDING_AUTH).
 *
 *
 ****************************************************************************/
