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/* This file is part of the Project Athena Zephyr Notification System.
* It is one of the source files comprising zwgc, the Zephyr WindowGram
* client.
*
* Created by: Marc Horowitz <marc@athena.mit.edu>
*
* $Source$
* $Author$
*
* Copyright (c) 1989 by the Massachusetts Institute of Technology.
* For copying and distribution information, see the file
* "mit-copyright.h".
*/
#if (!defined(lint) && !defined(SABER))
static char rcsid_standard_ports_c[] = "$Header$";
#endif
#include <zephyr/mit-copyright.h>
/****************************************************************************/
/* */
/* Code to setup standard ports: */
/* */
/****************************************************************************/
#include <stdio.h>
#include "new_memory.h"
#include "port.h"
#include "variables.h"
extern string tty_filter();
extern char *X_driver();
extern int X_driver_init();
extern int tty_filter_init();
/*
*
*/
char *plain_driver(input)
string input;
{
string processed_input = tty_filter(input, 0);
fputs(processed_input, stdout);
fflush(stdout);
free(processed_input);
return(NULL);
}
/*
*
*/
char *tty_driver(input)
string input;
{
string processed_input = tty_filter(input, 1);
fputs(processed_input, stdout);
fflush(stdout);
free(processed_input);
return(NULL);
}
/*
*
*/
string noop_filter(input)
string input;
{
return(input);
}
/*
*
*/
string plain_filter(input)
string input;
{
return(tty_filter(input, 0));
}
/*
*
*/
string fancy_filter(input)
string input;
{
return(tty_filter(input, 1));
}
/*
*
*/
static struct standard_port_info {
char *port_name;
/*
* 0 = ok to use as the default output port
* 1 = not ok to use as the default output port
* 2 = disabled
*/
int port_setup_status;
int (*port_init)();
#define INPUT_DESC 0
#define OUTPUT_DESC 1
#define FILTER 2
#define OUTPUT_PROC 3
int type;
char *(*function)();
int setup_arg;
} standard_port_info_table[] = {
{ "X", 0, X_driver_init, OUTPUT_PROC, X_driver, 0},
{ "tty", 0, tty_filter_init, OUTPUT_PROC, tty_driver, 0},
{ "plain", 0, tty_filter_init, OUTPUT_PROC, plain_driver, 0},
{ "stdout", 0, NULL, OUTPUT_DESC, NULL, 1},
{ "stderr", 0, NULL, OUTPUT_DESC, NULL, 2},
{ "stdin", 1, NULL, INPUT_DESC, NULL, 0},
{ "loopback", 1, NULL, FILTER, noop_filter, 0},
{ "plain_filter", 1, tty_filter_init, FILTER, plain_filter, 0},
{ "tty_filter", 1, tty_filter_init, FILTER, fancy_filter, 0},
{ NULL, 2, NULL, FILTER, NULL, 0} };
#ifdef notdef
/*
* <<<>>>
*/
static struct standard_port_info *get_standard_port_info(port_name)
string port_name;
{
struct standard_port_info *p;
for (p=standard_port_info_table; p->port_name; p++)
if (string_Eq(p->port_name, port_name) && p->port_setup_status!=2)
return(p);
return(NULL);
}
#endif
/*
*
*/
void init_standard_ports(pargc, argv)
int *pargc;
char **argv;
{
struct standard_port_info *p;
#ifdef notdef
string first_working_port = "";
string default_port = "";
/*
* Process argument list handling "-disable <port>" and
* "-default <output port>" arguments:
*/
for (new=current=argv+1; *current; current++) {
if (string_Eq(*current, "-disable")) {
current++; *pargc -= 2;
if (!*current)
usage();
if (p = get_standard_port_info(*current))
p->port_setup_status = 2;
} else if (string_Eq(*current, "-default")) {
current++; *pargc -= 2;
if (!*current)
usage();
default_port = *current;
} else
*(new++) = *current;
}
*new = *current;
/*
* Initialize all non-disabled ports. If a port reports an error,
* disable that port. Set default_port if not already set
* by the -default argument to the first non-disabled port.
*/
for (p = standard_port_info_table; p->port_name; p++) {
if (p->port_setup_status==2)
continue;
if (p->port_init && p->port_init(pargc, argv)) {
p->port_setup_status = 2;
continue;
}
if (!*first_working_port)
first_working_port = p->port_name;
}
if (!get_standard_port_info(default_port))
default_port = first_working_port;
var_set_variable("output_driver", default_port);
#endif
var_set_variable("output_driver", "X");
X_driver_init(pargc, argv);
tty_filter_init();
/*
* <<<>>>
*/
for (p=standard_port_info_table; p->port_name; p++) {
if (p->port_setup_status == 2)
continue;
switch (p->type) {
case INPUT_DESC:
create_port_from_files(p->port_name, fdopen(p->setup_arg, "r"),0);
break;
case OUTPUT_DESC:
create_port_from_files(p->port_name, 0, fdopen(p->setup_arg, "w"));
break;
case FILTER:
create_port_from_filter(p->port_name, p->function);
break;
case OUTPUT_PROC:
create_port_from_output_proc(p->port_name, p->function);
break;
}
}
}
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