[deliverable/linux.git] / arch / um / drivers / pty.c

/* 
 * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
 * Licensed under the GPL
 */

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <termios.h>
#include "chan_user.h"
#include "user.h"
#include "user_util.h"
#include "kern_util.h"
#include "os.h"
#include "um_malloc.h"

struct pty_chan {
	void (*announce)(char *dev_name, int dev);
	int dev;
	int raw;
	struct termios tt;
	char dev_name[sizeof("/dev/pts/0123456\0")];
};

static void *pty_chan_init(char *str, int device, const struct chan_opts *opts)
{
	struct pty_chan *data;

	data = um_kmalloc(sizeof(*data));
	if(data == NULL) return(NULL);
	*data = ((struct pty_chan) { .announce  	= opts->announce, 
				     .dev  		= device,
				     .raw  		= opts->raw });
	return(data);
}

static int pts_open(int input, int output, int primary, void *d,
		    char **dev_out)
{
	struct pty_chan *data = d;
	char *dev;
	int fd, err;

	fd = get_pty();
	if(fd < 0){
		err = -errno;
		printk("open_pts : Failed to open pts\n");
		return err;
	}
	if(data->raw){
		CATCH_EINTR(err = tcgetattr(fd, &data->tt));
		if(err)
			return(err);

		err = raw(fd);
		if(err)
			return(err);
	}

	dev = ptsname(fd);
	sprintf(data->dev_name, "%s", dev);
	*dev_out = data->dev_name;
	if (data->announce)
		(*data->announce)(dev, data->dev);
	return(fd);
}

static int getmaster(char *line)
{
	char *pty, *bank, *cp;
	int master, err;

	pty = &line[strlen("/dev/ptyp")];
	for (bank = "pqrs"; *bank; bank++) {
		line[strlen("/dev/pty")] = *bank;
		*pty = '0';
		if (os_stat_file(line, NULL) < 0)
			break;
		for (cp = "0123456789abcdef"; *cp; cp++) {
			*pty = *cp;
			master = os_open_file(line, of_rdwr(OPENFLAGS()), 0);
			if (master >= 0) {
				char *tp = &line[strlen("/dev/")];

				/* verify slave side is usable */
				*tp = 't';
				err = os_access(line, OS_ACC_RW_OK);
				*tp = 'p';
				if(err == 0) return(master);
				(void) os_close_file(master);
			}
		}
	}
	return(-1);
}

static int pty_open(int input, int output, int primary, void *d,
		    char **dev_out)
{
	struct pty_chan *data = d;
	int fd, err;
	char dev[sizeof("/dev/ptyxx\0")] = "/dev/ptyxx";

	fd = getmaster(dev);
	if(fd < 0)
		return(-errno);

	if(data->raw){
		err = raw(fd);
		if(err)
			return(err);
	}
	
	if(data->announce) (*data->announce)(dev, data->dev);

	sprintf(data->dev_name, "%s", dev);
	*dev_out = data->dev_name;
	return(fd);
}

const struct chan_ops pty_ops = {
	.type		= "pty",
	.init		= pty_chan_init,
	.open		= pty_open,
	.close		= generic_close,
	.read		= generic_read,
	.write		= generic_write,
	.console_write	= generic_console_write,
	.window_size	= generic_window_size,
	.free		= generic_free,
	.winch		= 0,
};

const struct chan_ops pts_ops = {
	.type		= "pts",
	.init		= pty_chan_init,
	.open		= pts_open,
	.close		= generic_close,
	.read		= generic_read,
	.write		= generic_write,
	.console_write	= generic_console_write,
	.window_size	= generic_window_size,
	.free		= generic_free,
	.winch		= 0,
};

/*
 * Overrides for Emacs so that we follow Linus's tabbing style.
 * Emacs will notice this stuff at the end of the file and automatically
 * adjust the settings for this buffer only.  This must remain at the end
 * of the file.
 * ---------------------------------------------------------------------------
 * Local variables:
 * c-file-style: "linux"
 * End:
 */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
	3	* Licensed under the GPL
	4	*/
	5
	6	#include <stdio.h>
	7	#include <unistd.h>
	8	#include <string.h>
	9	#include <errno.h>
	10	#include <termios.h>
	11	#include "chan_user.h"
	12	#include "user.h"
	13	#include "user_util.h"
	14	#include "kern_util.h"
	15	#include "os.h"
c13e5690	16	#include "um_malloc.h"
1da177e4 LT	17
	18	struct pty_chan {
	19	void (announce)(char dev_name, int dev);
	20	int dev;
	21	int raw;
	22	struct termios tt;
	23	char dev_name[sizeof("/dev/pts/0123456\0")];
	24	};
	25
5e7672ec	26	static void pty_chan_init(char str, int device, const struct chan_opts *opts)
1da177e4 LT	27	{
	28	struct pty_chan *data;
	29
	30	data = um_kmalloc(sizeof(*data));
	31	if(data == NULL) return(NULL);
	32	*data = ((struct pty_chan) { .announce = opts->announce,
	33	.dev = device,
	34	.raw = opts->raw });
	35	return(data);
	36	}
	37
	38	static int pts_open(int input, int output, int primary, void *d,
	39	char **dev_out)
	40	{
	41	struct pty_chan *data = d;
	42	char *dev;
	43	int fd, err;
	44
	45	fd = get_pty();
	46	if(fd < 0){
b4fd310e	47	err = -errno;
1da177e4	48	printk("open_pts : Failed to open pts\n");
b4fd310e	49	return err;
1da177e4 LT	50	}
	51	if(data->raw){
	52	CATCH_EINTR(err = tcgetattr(fd, &data->tt));
	53	if(err)
	54	return(err);
	55
	56	err = raw(fd);
	57	if(err)
	58	return(err);
	59	}
	60
	61	dev = ptsname(fd);
	62	sprintf(data->dev_name, "%s", dev);
	63	*dev_out = data->dev_name;
	64	if (data->announce)
	65	(*data->announce)(dev, data->dev);
	66	return(fd);
	67	}
	68
	69	static int getmaster(char *line)
	70	{
	71	char pty, bank, *cp;
	72	int master, err;
	73
	74	pty = &line[strlen("/dev/ptyp")];
	75	for (bank = "pqrs"; *bank; bank++) {
	76	line[strlen("/dev/pty")] = *bank;
	77	*pty = '0';
	78	if (os_stat_file(line, NULL) < 0)
	79	break;
	80	for (cp = "0123456789abcdef"; *cp; cp++) {
	81	pty = cp;
	82	master = os_open_file(line, of_rdwr(OPENFLAGS()), 0);
	83	if (master >= 0) {
	84	char *tp = &line[strlen("/dev/")];
	85
	86	/* verify slave side is usable */
	87	*tp = 't';
	88	err = os_access(line, OS_ACC_RW_OK);
	89	*tp = 'p';
	90	if(err == 0) return(master);
	91	(void) os_close_file(master);
	92	}
	93	}
	94	}
	95	return(-1);
	96	}
	97
	98	static int pty_open(int input, int output, int primary, void *d,
	99	char **dev_out)
	100	{
	101	struct pty_chan *data = d;
	102	int fd, err;
	103	char dev[sizeof("/dev/ptyxx\0")] = "/dev/ptyxx";
	104
	105	fd = getmaster(dev);
	106	if(fd < 0)
	107	return(-errno);
	108
	109	if(data->raw){
	110	err = raw(fd);
	111	if(err)
	112	return(err);
	113	}
114
115	if(data->announce) (*data->announce)(dev, data->dev);
116
117	sprintf(data->dev_name, "%s", dev);
118	*dev_out = data->dev_name;
119	return(fd);
120	}
121
5e7672ec	122	const struct chan_ops pty_ops = {
1da177e4 LT	123	.type = "pty",
	124	.init = pty_chan_init,
	125	.open = pty_open,
	126	.close = generic_close,
	127	.read = generic_read,
	128	.write = generic_write,
fd9bc53b	129	.console_write = generic_console_write,
1da177e4 LT	130	.window_size = generic_window_size,
	131	.free = generic_free,
	132	.winch = 0,
	133	};
	134
5e7672ec	135	const struct chan_ops pts_ops = {
1da177e4 LT	136	.type = "pts",
	137	.init = pty_chan_init,
	138	.open = pts_open,
	139	.close = generic_close,
	140	.read = generic_read,
	141	.write = generic_write,
fd9bc53b	142	.console_write = generic_console_write,
1da177e4 LT	143	.window_size = generic_window_size,
	144	.free = generic_free,
	145	.winch = 0,
	146	};
	147
	148	/*
	149	* Overrides for Emacs so that we follow Linus's tabbing style.
	150	* Emacs will notice this stuff at the end of the file and automatically
	151	* adjust the settings for this buffer only. This must remain at the end
	152	* of the file.
	153	* ---------------------------------------------------------------------------
	154	* Local variables:
	155	* c-file-style: "linux"
	156	* End:
	157	*/