Merge http://jdike.stearns.org:5000/mconfig-2.5

into uml.karaya.com:/home/jdike/linux/2.5/uml-2.5

arch/um/drivers/chan_kern.c

@@ -24,7 +24,8 @@ static void *not_configged_init(char *str, int device, struct chan_opts *opts)
 	return(NULL);
 }
 
-static int not_configged_open(int input, int output, int primary, void *data)
+static int not_configged_open(int input, int output, int primary, void *data,
+			      char **dev_out)
 {
 	printk(KERN_ERR "Using a channel type which is configured out of "
 	       "UML\n");
@@ -112,7 +113,8 @@ static int open_one_chan(struct chan *chan, int input, int output, int primary)
 
 	if(chan->opened) return(0);
 	if(chan->ops->open == NULL) fd = 0;
-	else fd = (*chan->ops->open)(input, output, primary, chan->data);
+	else fd = (*chan->ops->open)(input, output, primary, chan->data,
+				     &chan->dev);
 	if(fd < 0) return(fd);
 	chan->fd = fd;
 
@@ -258,6 +260,66 @@ void free_chan(struct list_head *chans)
 	}
 }
 
+static int one_chan_config_string(struct chan *chan, char *str, int size,
+				  char **error_out)
+{
+	int n = 0;
+
+	CONFIG_CHUNK(str, size, n, chan->ops->type, 0);
+
+	if(chan->dev == NULL){
+		CONFIG_CHUNK(str, size, n, "", 1);
+		return(n);
+	}
+
+	CONFIG_CHUNK(str, size, n, ":", 0);
+	CONFIG_CHUNK(str, size, n, chan->dev, 0);
+
+	return(n);
+}
+
+static int chan_pair_config_string(struct chan *in, struct chan *out, 
+				   char *str, int size, char **error_out)
+{
+	int n;
+
+	n = one_chan_config_string(in, str, size, error_out);
+	str += n;
+	size -= n;
+
+	if(in == out){
+		CONFIG_CHUNK(str, size, n, "", 1);
+		return(n);
+	}
+
+	CONFIG_CHUNK(str, size, n, ",", 1);
+	n = one_chan_config_string(out, str, size, error_out);
+	str += n;
+	size -= n;
+	CONFIG_CHUNK(str, size, n, "", 1);
+
+	return(n);
+}
+
+int chan_config_string(struct list_head *chans, char *str, int size, 
+		       char **error_out)
+{
+	struct list_head *ele;
+	struct chan *chan, *in = NULL, *out = NULL;
+
+	list_for_each(ele, chans){
+		chan = list_entry(ele, struct chan, list);
+		if(!chan->primary)
+			continue;
+		if(chan->input)
+			in = chan;
+		if(chan->output)
+			out = chan;
+	}
+
+	return(chan_pair_config_string(in, out, str, size, error_out));
+}
+
 struct chan_type {
 	char *key;
 	struct chan_ops *ops;

arch/um/drivers/fd.c

@@ -15,6 +15,7 @@ struct fd_chan {
 	int fd;
 	int raw;
 	struct termios tt;
+	char str[sizeof("1234567890\0")];
 };
 
 void *fd_init(char *str, int device, struct chan_opts *opts)
@@ -40,7 +41,7 @@ void *fd_init(char *str, int device, struct chan_opts *opts)
 	return(data);
 }
 
-int fd_open(int input, int output, int primary, void *d)
+int fd_open(int input, int output, int primary, void *d, char **dev_out)
 {
 	struct fd_chan *data = d;
 
@@ -48,6 +49,8 @@ int fd_open(int input, int output, int primary, void *d)
 		tcgetattr(data->fd, &data->tt);
 		raw(data->fd, 0);
 	}
+	sprintf(data->str, "%d", data->fd);
+	*dev_out = data->str;
 	return(data->fd);
 }
 
@@ -69,6 +72,7 @@ int fd_console_write(int fd, const char *buf, int n, void *d)
 }
 
 struct chan_ops fd_ops = {
+	type:		"fd",
 	init:		fd_init,
 	open:		fd_open,
 	close:		fd_close,

arch/um/drivers/line.c

@@ -8,11 +8,13 @@
 #include "linux/list.h"
 #include "linux/devfs_fs_kernel.h"
 #include "asm/irq.h"
+#include "asm/uaccess.h"
 #include "chan_kern.h"
 #include "irq_user.h"
 #include "line.h"
 #include "kern.h"
 #include "user_util.h"
+#include "kern_util.h"
 #include "os.h"
 
 #define LINE_BUFSIZE 4096
@@ -281,7 +283,7 @@ void close_lines(struct line *lines, int nlines)
 		close_chan(&lines[i].chan_list);
 }
 
-void line_setup(struct line *lines, int num, char *init)
+int line_setup(struct line *lines, int num, char *init, int all_allowed)
 {
 	int i, n;
 	char *end;
@@ -292,12 +294,36 @@ void line_setup(struct line *lines, int num, char *init)
 		if(*end != '='){
 			printk(KERN_ERR "line_setup failed to parse \"%s\"\n", 
 			       init);
-			return;
+			return(1);
 		}
 		init = end;
 	}
 	init++;
-	if(n == -1){
+	if((n >= 0) && (n >= num)){
+		printk("line_setup - %d out of range ((0 ... %d) allowed)\n",
+		       n, num);
+		return(1);
+	}
+	else if(n >= 0){
+		if(lines[n].count > 0){
+			printk("line_setup - device %d is open\n", n);
+			return(1);
+		}
+		if(lines[n].init_pri <= INIT_ONE){
+			lines[n].init_pri = INIT_ONE;
+			if(!strcmp(init, "none")) lines[n].valid = 0;
+			else {
+				lines[n].init_str = init;
+				lines[n].valid = 1;
+			}	
+		}
+	}
+	else if(!all_allowed){
+		printk("line_setup - can't configure all devices from "
+		       "mconsole\n");
+		return(1);
+	}
+	else {
 		for(i = 0; i < num; i++){
 			if(lines[i].init_pri <= INIT_ALL){
 				lines[i].init_pri = INIT_ALL;
@@ -309,14 +335,57 @@ void line_setup(struct line *lines, int num, char *init)
 			}
 		}
 	}
-	else if(lines[n].init_pri <= INIT_ONE){
-		lines[n].init_pri = INIT_ONE;
-		if(!strcmp(init, "none")) lines[n].valid = 0;
-		else {
-			lines[n].init_str = init;
-			lines[n].valid = 1;
-		}
+	return(0);
+}
+
+int line_config(struct line *lines, int num, char *str)
+{
+	char *new = uml_strdup(str);
+
+	if(new == NULL){
+		printk("line_config - uml_strdup failed\n");
+		return(-ENOMEM);
+	}
+	return(line_setup(lines, num, new, 0));
+}
+
+int line_get_config(char *name, struct line *lines, int num, char *str, 
+		    int size, char **error_out)
+{
+	struct line *line;
+	char *end;
+	int dev, n = 0;
+
+	dev = simple_strtoul(name, &end, 0);
+	if((*end != '\0') || (end == name)){
+		*error_out = "line_setup failed to parse device number";
+		return(0);
 	}
+
+	if((dev < 0) || (dev >= num)){
+		*error_out = "device number of of range";
+		return(0);
+	}
+
+	line = &lines[dev];
+	down(&line->sem);
+	
+	if(!line->valid)
+		CONFIG_CHUNK(str, size, n, "none", 1);
+	else if(line->count == 0)
+		CONFIG_CHUNK(str, size, n, line->init_str, 1);
+	else n = chan_config_string(&line->chan_list, str, size, error_out);
+
+	up(&line->sem);
+	return(n);
+}
+
+int line_remove(struct line *lines, int num, char *str)
+{
+	char config[sizeof("conxxxx=none\0")];
+
+	sprintf(config, "%s=none", str);
+	return(line_setup(lines, num, config, 0));
 }
 
 void line_register_devfs(struct lines *set, struct line_driver *line_driver, 
@@ -366,6 +435,8 @@ void line_register_devfs(struct lines *set, struct line_driver *line_driver,
 		if(!lines[i].valid) 
 			tty_unregister_devfs(driver, driver->minor_start + i);
 	}
+
+	mconsole_register_dev(&line_driver->mc);
 }
 
 void lines_init(struct line *lines, int nlines)

arch/um/drivers/mconsole_kern.c

@@ -108,6 +108,7 @@ void mconsole_version(struct mc_request *req)
     reboot - Reboot UML
     config <dev>=<config> - Add a new device to UML; 
 	same syntax as command line
+    config <dev> - Query the configuration of a device
     remove <dev> - Remove a device from UML
     sysrq <letter> - Performs the SysRq action controlled by the letter
     cad - invoke the Ctl-Alt-Del handler
@@ -181,10 +182,56 @@ static struct mc_device *mconsole_find_dev(char *name)
 	return(NULL);
 }
 
+#define CONFIG_BUF_SIZE 64
+
+static void mconsole_get_config(int (*get_config)(char *, char *, int, 
+						  char **),
+				struct mc_request *req, char *name)
+{
+	char default_buf[CONFIG_BUF_SIZE], *error, *buf;
+	int n, size;
+
+	if(get_config == NULL){
+		mconsole_reply(req, "No get_config routine defined", 1, 0);
+		return;
+	}
+
+	error = NULL;
+	size = sizeof(default_buf)/sizeof(default_buf[0]);
+	buf = default_buf;
+
+	while(1){
+		n = (*get_config)(name, buf, size, &error);
+		if(error != NULL){
+			mconsole_reply(req, error, 1, 0);
+			goto out;
+		}
+
+		if(n <= size){
+			mconsole_reply(req, buf, 0, 0);
+			goto out;
+		}
+
+		if(buf != default_buf)
+			kfree(buf);
+
+		size = n;
+		buf = kmalloc(size, GFP_KERNEL);
+		if(buf == NULL){
+			mconsole_reply(req, "Failed to allocate buffer", 1, 0);
+			return;
+		}
+	}
+ out:
+	if(buf != default_buf)
+		kfree(buf);
+	
+}
+
 void mconsole_config(struct mc_request *req)
 {
 	struct mc_device *dev;
-	char *ptr = req->request.data;
+	char *ptr = req->request.data, *name;
 	int err;
 
 	ptr += strlen("config");
@@ -194,8 +241,17 @@ void mconsole_config(struct mc_request *req)
 		mconsole_reply(req, "Bad configuration option", 1, 0);
 		return;
 	}
-	err = (*dev->config)(&ptr[strlen(dev->name)]);
-	mconsole_reply(req, "", err, 0);
+
+	name = &ptr[strlen(dev->name)];
+	ptr = name;
+	while((*ptr != '=') && (*ptr != '\0'))
+		ptr++;
+
+	if(*ptr == '='){
+		err = (*dev->config)(name);
+		mconsole_reply(req, "", err, 0);
+	}
+	else mconsole_get_config(dev->get_config, req, name);
 }
 
 void mconsole_remove(struct mc_request *req)

arch/um/drivers/null.c

@@ -3,6 +3,7 @@
  * Licensed under the GPL
  */
 
+#include <stdlib.h>
 #include <errno.h>
 #include <fcntl.h>
 #include "chan_user.h"
@@ -15,8 +16,9 @@ void *null_init(char *str, int device, struct chan_opts *opts)
 	return(&null_chan);
 }
 
-int null_open(int input, int output, int primary, void *d)
+int null_open(int input, int output, int primary, void *d, char **dev_out)
 {
+	*dev_out = NULL;
 	return(os_open_file(DEV_NULL, of_rdwr(OPENFLAGS()), 0));
 }
 
@@ -30,6 +32,7 @@ void null_free(void *data)
 }
 
 struct chan_ops null_ops = {
+	type:		"null",
 	init:		null_init,
 	open:		null_open,
 	close:		generic_close,

arch/um/drivers/port_user.c

@@ -3,11 +3,12 @@
  * Licensed under the GPL
  */
 
+#include <stdio.h>
 #include <stddef.h>
 #include <stdlib.h>
+#include <string.h>
 #include <errno.h>
 #include <unistd.h>
-#include <string.h>
 #include <termios.h>
 #include <sys/socket.h>
 #include <sys/un.h>
@@ -24,6 +25,7 @@ struct port_chan {
 	int raw;
 	struct termios tt;
 	void *kernel_data;
+	char dev[sizeof("32768\0")];
 };
 
 void *port_init(char *str, int device, struct chan_opts *opts)
@@ -50,11 +52,12 @@ void *port_init(char *str, int device, struct chan_opts *opts)
 	if((data = um_kmalloc(sizeof(*data))) == NULL) return(NULL);
 	*data = ((struct port_chan) { raw : 		opts->raw,
 				      kernel_data :	kern_data });
+	sprintf(data->dev, "%d", port);
 	
 	return(data);
 }
 
-int port_open(int input, int output, int primary, void *d)
+int port_open(int input, int output, int primary, void *d, char **dev_out)
 {
 	struct port_chan *data = d;
 	int fd;
@@ -64,6 +67,7 @@ int port_open(int input, int output, int primary, void *d)
 		tcgetattr(fd, &data->tt);
 		raw(fd, 0);
 	}
+	*dev_out = data->dev;
 	return(fd);
 }
 
@@ -91,6 +95,7 @@ void port_free(void *d)
 }
 
 struct chan_ops port_ops = {
+	type:		"port",
 	init:		port_init,
 	open:		port_open,
 	close:		port_close,

arch/um/drivers/pty.c

@@ -19,6 +19,7 @@ struct pty_chan {
 	int dev;
 	int raw;
 	struct termios tt;
+	char dev_name[sizeof("/dev/pts/0123456\0")];
 };
 
 void *pty_chan_init(char *str, int device, struct chan_opts *opts)
@@ -32,9 +33,10 @@ void *pty_chan_init(char *str, int device, struct chan_opts *opts)
 	return(data);
 }
 
-int pts_open(int input, int output, int primary, void *d)
+int pts_open(int input, int output, int primary, void *d, char **dev_out)
 {
 	struct pty_chan *data = d;
+	char *dev;
 	int fd;
 
 	if((fd = get_pty()) < 0){
@@ -45,7 +47,11 @@ int pts_open(int input, int output, int primary, void *d)
 		tcgetattr(fd, &data->tt);
 		raw(fd, 0);
 	}
-	if(data->announce) (*data->announce)(ptsname(fd), data->dev);
+
+	dev = ptsname(fd);
+	sprintf(data->dev_name, "%s", dev);
+	*dev_out = data->dev_name;
+	if(data->announce) (*data->announce)(dev, data->dev);
 	return(fd);
 }
 
@@ -94,7 +100,7 @@ static void grantpt_cb(void *arg)
 	info->err = errno;
 }
 
-int pty_open(int input, int output, int primary, void *d)
+int pty_open(int input, int output, int primary, void *d, char **dev_out)
 {
 	struct pty_chan *data = d;
 	int fd;
@@ -110,6 +116,9 @@ int pty_open(int input, int output, int primary, void *d)
 
 	if(data->raw) raw(fd, 0);
 	if(data->announce) (*data->announce)(dev, data->dev);
+
+	sprintf(data->dev_name, "%s", dev);
+	*dev_out = data->dev_name;
 	return(fd);
 }
 
@@ -121,6 +130,7 @@ int pty_console_write(int fd, const char *buf, int n, void *d)
 }
 
 struct chan_ops pty_ops = {
+	type:		"pty",
 	init:		pty_chan_init,
 	open:		pty_open,
 	close:		generic_close,
@@ -133,6 +143,7 @@ struct chan_ops pty_ops = {
 };
 
 struct chan_ops pts_ops = {
+	type:		"pts",
 	init:		pty_chan_init,
 	open:		pts_open,
 	close:		generic_close,

arch/um/drivers/ssl.c

@@ -20,6 +20,7 @@
 #include "kern.h"
 #include "init.h"
 #include "irq_user.h"
+#include "mconsole_kern.h"
 #include "2_5compat.h"
 
 static int ssl_version = 1;
@@ -47,6 +48,10 @@ static struct chan_opts opts = {
 	in_kernel :	1,
 };
 
+static int ssl_config(char *str);
+static int ssl_get_config(char *dev, char *str, int size, char **error_out);
+static int ssl_remove(char *str);
+
 static struct line_driver driver = {
 	name :			"UML serial line",
 	devfs_name :		"tts/%d",
@@ -60,6 +65,12 @@ static struct line_driver driver = {
 	write_irq_name :	"ssl-write",
 	symlink_from :		"serial",
 	symlink_to :		"tts",
+	mc : {
+		name : 		"ssl",
+		config :	ssl_config,
+		get_config :	ssl_get_config,
+		remove :	ssl_remove,
+	},
 };
 
 /* The array is initialized by line_init, which is an initcall.  The 
@@ -70,6 +81,25 @@ static struct line serial_lines[NR_PORTS] =
 
 static struct lines lines = LINES_INIT(NR_PORTS);
 
+static int ssl_config(char *str)
+{
+	return(line_config(serial_lines, 
+			   sizeof(serial_lines)/sizeof(serial_lines[0]), str));
+}
+
+static int ssl_get_config(char *dev, char *str, int size, char **error_out)
+{
+	return(line_get_config(dev, serial_lines, 
+			       sizeof(serial_lines)/sizeof(serial_lines[0]), 
+			       str, size, error_out));
+}
+
+static int ssl_remove(char *str)
+{
+	return(line_remove(serial_lines, 
+			   sizeof(serial_lines)/sizeof(serial_lines[0]), str));
+}
+
 int ssl_open(struct tty_struct *tty, struct file *filp)
 {
 	return(line_open(serial_lines, tty, &opts));
@@ -207,7 +237,7 @@ __initcall(ssl_init);
 static int ssl_chan_setup(char *str)
 {
 	line_setup(serial_lines, sizeof(serial_lines)/sizeof(serial_lines[0]),
-		   str);
+		   str, 1);
 	return(1);
 }
 

arch/um/drivers/stdio_console.c

@@ -27,6 +27,7 @@
 #include "user_util.h"
 #include "kern_util.h"
 #include "irq_user.h"
+#include "mconsole_kern.h"
 #include "init.h"
 #include "2_5compat.h"
 
@@ -41,6 +42,7 @@ static struct tty_driver console_driver;
 static int console_refcount = 0;
 
 static struct chan_ops init_console_ops = {
+	type:		"you shouldn't see this",
 	init : 		NULL,
 	open : 		NULL,
 	close :		NULL,
@@ -78,6 +80,10 @@ static struct chan_opts opts = {
 	in_kernel :	1,
 };
 
+static int con_config(char *str);
+static int con_get_config(char *dev, char *str, int size, char **error_out);
+static int con_remove(char *str);
+
 static struct line_driver driver = {
 	name :			"UML console",
 	devfs_name :		"vc/%d",
@@ -91,6 +97,12 @@ static struct line_driver driver = {
 	write_irq_name :	"console-write",
 	symlink_from :		"ttys",
 	symlink_to :		"vc",
+	mc : {
+		name : 		"con",
+		config :	con_config,
+		get_config :	con_get_config,
+		remove :	con_remove,
+	},
 };
 
 static struct lines console_lines = LINES_INIT(MAX_TTYS);
@@ -102,6 +114,22 @@ struct line vts[MAX_TTYS] = { LINE_INIT(CONFIG_CON_ZERO_CHAN, &driver),
 			      [ 1 ... MAX_TTYS - 1 ] = 
 			      LINE_INIT(CONFIG_CON_CHAN, &driver) };
 
+static int con_config(char *str)
+{
+	return(line_config(vts, sizeof(vts)/sizeof(vts[0]), str));
+}
+
+static int con_get_config(char *dev, char *str, int size, char **error_out)
+{
+	return(line_get_config(dev, vts, sizeof(vts)/sizeof(vts[0]), str, 
+			       size, error_out));
+}
+
+static int con_remove(char *str)
+{
+	return(line_remove(vts, sizeof(vts)/sizeof(vts[0]), str));
+}
+
 static int open_console(struct tty_struct *tty)
 {
 	return(line_open(vts, tty, &opts));
@@ -195,7 +223,7 @@ void stdio_console_init(void)
 
 static int console_chan_setup(char *str)
 {
-	line_setup(vts, sizeof(vts)/sizeof(vts[0]), str);
+	line_setup(vts, sizeof(vts)/sizeof(vts[0]), str, 1);
 	return(1);
 }
 

arch/um/drivers/tty.c

@@ -30,14 +30,15 @@ void *tty_chan_init(char *str, int device, struct chan_opts *opts)
 	}
 	str++;
 
-	if((data = um_kmalloc(sizeof(*data))) == NULL) return(NULL);
+	if((data = um_kmalloc(sizeof(*data))) == NULL) 
+		return(NULL);
 	*data = ((struct tty_chan) { dev :	str,
 				     raw :	opts->raw });
 				     
 	return(data);
 }
 
-int tty_open(int input, int output, int primary, void *d)
+int tty_open(int input, int output, int primary, void *d, char **dev_out)
 {
 	struct tty_chan *data = d;
 	int fd;
@@ -48,6 +49,8 @@ int tty_open(int input, int output, int primary, void *d)
 		tcgetattr(fd, &data->tt);
 		raw(fd, 0);
 	}
+
+	*dev_out = data->dev;
 	return(fd);
 }
 
@@ -59,6 +62,7 @@ int tty_console_write(int fd, const char *buf, int n, void *d)
 }
 
 struct chan_ops tty_ops = {
+	type:		"tty",
 	init:		tty_chan_init,
 	open:		tty_open,
 	close:		generic_close,

arch/um/drivers/ubd_kern.c

@@ -577,6 +577,44 @@ static int ubd_config(char *str)
 	return(err);
 }
 
+static int ubd_get_config(char *dev, char *str, int size, char **error_out)
+{
+	struct ubd *ubd;
+	char *end;
+	int major, n = 0;
+
+	major = simple_strtoul(dev, &end, 0);
+	if((*end != '\0') || (end == dev)){
+		*error_out = "ubd_get_config : didn't parse major number";
+		return(-1);
+	}
+
+	if((major >= MAX_DEV) || (major < 0)){
+		*error_out = "ubd_get_config : major number out of range";
+		return(-1);
+	}
+
+	ubd = &ubd_dev[major];
+	spin_lock(&ubd_lock);
+
+	if(ubd->file == NULL){
+		CONFIG_CHUNK(str, size, n, "", 1);
+		goto out;
+	}
+
+	CONFIG_CHUNK(str, size, n, ubd->file, 0);
+
+	if(ubd->cow.file != NULL){
+		CONFIG_CHUNK(str, size, n, ",", 0);
+		CONFIG_CHUNK(str, size, n, ubd->cow.file, 1);
+	}
+	else CONFIG_CHUNK(str, size, n, "", 1);
+
+ out:
+	spin_unlock(&ubd_lock);
+	return(n);
+}
+
 static int ubd_remove(char *str)
 {
 	struct ubd *dev;
@@ -623,6 +661,7 @@ static int ubd_remove(char *str)
 static struct mc_device ubd_mc = {
 	.name		= "ubd",
 	.config		= ubd_config,
+ 	.get_config	= ubd_get_config,
 	.remove		= ubd_remove,
 };
 

arch/um/drivers/xterm.c

@@ -83,7 +83,7 @@ __uml_setup("xterm=", xterm_setup,
 "    are 'xterm=gnome-terminal,-t,-x'.\n\n"
 );
 
-int xterm_open(int input, int output, int primary, void *d)
+int xterm_open(int input, int output, int primary, void *d, char **dev_out)
 {
 	struct xterm_chan *data = d;
 	unsigned long stack;
@@ -144,6 +144,7 @@ int xterm_open(int input, int output, int primary, void *d)
 	if(data->raw) raw(new, 0);
 
 	data->pid = pid;
+	*dev_out = NULL;
 	return(new);
 }
 
@@ -171,6 +172,7 @@ int xterm_console_write(int fd, const char *buf, int n, void *d)
 }
 
 struct chan_ops xterm_ops = {
+	type:		"xterm",
 	init:		xterm_init,
 	open:		xterm_open,
 	close:		xterm_close,

arch/um/include/chan_kern.h

@@ -12,6 +12,7 @@
 
 struct chan {
 	struct list_head list;
+	char *dev;
 	unsigned int primary:1;
 	unsigned int input:1;
 	unsigned int output:1;
@@ -38,6 +39,8 @@ extern int chan_window_size(struct list_head *chans,
 			     unsigned short *rows_out, 
 			     unsigned short *cols_out);
 extern int chan_out_fd(struct list_head *chans);
+extern int chan_config_string(struct list_head *chans, char *str, int size,
+			      char **error_out);
 
 #endif
 

arch/um/include/chan_user.h

@@ -19,8 +19,9 @@ struct chan_opts {
 enum chan_init_pri { INIT_STATIC, INIT_ALL, INIT_ONE };
 
 struct chan_ops {
+	char *type;
 	void *(*init)(char *, int, struct chan_opts *);
-	int (*open)(int, int, int, void *);
+	int (*open)(int, int, int, void *, char **);
 	void (*close)(int, void *);
 	int (*read)(int, char *, void *);
 	int (*write)(int, const char *, int, void *);

arch/um/include/line.h

@@ -11,6 +11,7 @@
 #include "linux/tty.h"
 #include "asm/semaphore.h"
 #include "chan_user.h"
+#include "mconsole_kern.h"
 
 struct line_driver {
 	char *name;
@@ -25,6 +26,7 @@ struct line_driver {
 	char *write_irq_name;
 	char *symlink_from;
 	char *symlink_to;
+	struct mc_device mc;
 };
 
 struct line {
@@ -70,8 +72,9 @@ extern void line_write_interrupt(int irq, void *data, struct pt_regs *unused);
 extern void line_close(struct line *lines, struct tty_struct *tty);
 extern int line_open(struct line *lines, struct tty_struct *tty, 
 		     struct chan_opts *opts);
-extern void line_setup(struct line *lines, int num, char *init);
-extern int line_write(struct line *line, struct tty_struct *tty, 
+extern int line_setup(struct line *lines, int num, char *init, 
+		      int all_allowed);
+extern int line_write(struct line *line, struct tty_struct *tty,
 		      const char *buf, int len);
 extern int line_write_room(struct tty_struct *tty);
 extern char *add_xterm_umid(char *base);
@@ -84,6 +87,10 @@ extern void line_register_devfs(struct lines *set,
 				int nlines);
 extern void lines_init(struct line *lines, int nlines);
 extern void close_lines(struct line *lines, int nlines);
+extern int line_config(struct line *lines, int num, char *str);
+extern int line_remove(struct line *lines, int num, char *str);
+extern int line_get_config(char *dev, struct line *lines, int num, char *str, 
+			   int size, char **error_out);
 
 #endif
 

arch/um/include/mconsole_kern.h

 /*
- * Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
  * Licensed under the GPL
  */
 
@@ -19,9 +19,23 @@ struct mc_device {
 	struct list_head list;
 	char *name;
 	int (*config)(char *);
+	int (*get_config)(char *, char *, int, char **);
 	int (*remove)(char *);
 };
 
+#define CONFIG_CHUNK(str, size, current, chunk, end) \
+do { \
+	current += strlen(chunk); \
+	if(current >= size) \
+		str = NULL; \
+	if(str != NULL){ \
+		strcpy(str, chunk); \
+		str += strlen(chunk); \
+	} \
+	if(end) \
+		current++; \
+} while(0)
+
 #ifdef CONFIG_MCONSOLE
 
 extern void mconsole_register_dev(struct mc_device *new);