Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

arch/um/drivers/port_user.c

@@ -0,0 +1,225 @@
+/* 
+ * Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include <stdio.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <termios.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <netinet/in.h>
+#include "user_util.h"
+#include "kern_util.h"
+#include "user.h"
+#include "chan_user.h"
+#include "port.h"
+#include "helper.h"
+#include "os.h"
+
+struct port_chan {
+	int raw;
+	struct termios tt;
+	void *kernel_data;
+	char dev[sizeof("32768\0")];
+};
+
+static void *port_init(char *str, int device, struct chan_opts *opts)
+{
+	struct port_chan *data;
+	void *kern_data;
+	char *end;
+	int port;
+
+	if(*str != ':'){
+		printk("port_init : channel type 'port' must specify a "
+		       "port number\n");
+		return(NULL);
+	}
+	str++;
+	port = strtoul(str, &end, 0);
+	if((*end != '\0') || (end == str)){
+		printk("port_init : couldn't parse port '%s'\n", str);
+		return(NULL);
+	}
+
+	kern_data = port_data(port);
+	if(kern_data == NULL)
+		return(NULL);
+
+	data = um_kmalloc(sizeof(*data));
+	if(data == NULL)
+		goto err;
+
+	*data = ((struct port_chan) { .raw  		= opts->raw,
+				      .kernel_data 	= kern_data });
+	sprintf(data->dev, "%d", port);
+
+	return(data);
+ err:
+	port_kern_free(kern_data);
+	return(NULL);
+}
+
+static void port_free(void *d)
+{
+	struct port_chan *data = d;
+
+	port_kern_free(data->kernel_data);
+	kfree(data);
+}
+
+static int port_open(int input, int output, int primary, void *d,
+		     char **dev_out)
+{
+	struct port_chan *data = d;
+	int fd, err;
+
+	fd = port_wait(data->kernel_data);
+	if((fd >= 0) && data->raw){
+		CATCH_EINTR(err = tcgetattr(fd, &data->tt));
+		if(err)
+			return(err);
+
+		err = raw(fd);
+		if(err)
+			return(err);
+	}
+	*dev_out = data->dev;
+	return(fd);
+}
+
+static void port_close(int fd, void *d)
+{
+	struct port_chan *data = d;
+
+	port_remove_dev(data->kernel_data);
+	os_close_file(fd);
+}
+
+static int port_console_write(int fd, const char *buf, int n, void *d)
+{
+	struct port_chan *data = d;
+
+	return(generic_console_write(fd, buf, n, &data->tt));
+}
+
+struct chan_ops port_ops = {
+	.type		= "port",
+	.init		= port_init,
+	.open		= port_open,
+	.close		= port_close,
+	.read	        = generic_read,
+	.write		= generic_write,
+	.console_write	= port_console_write,
+	.window_size	= generic_window_size,
+	.free		= port_free,
+	.winch		= 1,
+};
+
+int port_listen_fd(int port)
+{
+	struct sockaddr_in addr;
+	int fd, err, arg;
+
+	fd = socket(PF_INET, SOCK_STREAM, 0);
+	if(fd == -1) 
+		return(-errno);
+
+	arg = 1;
+	if(setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &arg, sizeof(arg)) < 0){
+		err = -errno;
+		goto out;
+	}
+
+	addr.sin_family = AF_INET;
+	addr.sin_port = htons(port);
+	addr.sin_addr.s_addr = htonl(INADDR_ANY);
+	if(bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0){
+		err = -errno;
+		goto out;
+	}
+  
+	if(listen(fd, 1) < 0){
+		err = -errno;
+		goto out;
+	}
+
+	err = os_set_fd_block(fd, 0);
+	if(err < 0)
+		goto out;
+
+	return(fd);
+ out:
+	os_close_file(fd);
+	return(err);
+}
+
+struct port_pre_exec_data {
+	int sock_fd;
+	int pipe_fd;
+};
+
+void port_pre_exec(void *arg)
+{
+	struct port_pre_exec_data *data = arg;
+
+	dup2(data->sock_fd, 0);
+	dup2(data->sock_fd, 1);
+	dup2(data->sock_fd, 2);
+	os_close_file(data->sock_fd);
+	dup2(data->pipe_fd, 3);
+	os_shutdown_socket(3, 1, 0);
+	os_close_file(data->pipe_fd);
+}
+
+int port_connection(int fd, int *socket, int *pid_out)
+{
+	int new, err;
+	char *argv[] = { "/usr/sbin/in.telnetd", "-L", 
+			 "/usr/lib/uml/port-helper", NULL };
+	struct port_pre_exec_data data;
+
+	new = os_accept_connection(fd);
+	if(new < 0)
+		return(new);
+
+	err = os_pipe(socket, 0, 0);
+	if(err < 0)
+		goto out_close;
+
+	data = ((struct port_pre_exec_data)
+		{ .sock_fd  		= new,
+		  .pipe_fd 		= socket[1] });
+
+	err = run_helper(port_pre_exec, &data, argv, NULL);
+	if(err < 0) 
+		goto out_shutdown;
+
+	*pid_out = err;
+	return(new);
+
+ out_shutdown:
+	os_shutdown_socket(socket[0], 1, 1);
+	os_close_file(socket[0]);
+	os_shutdown_socket(socket[1], 1, 1);	
+	os_close_file(socket[1]);
+ out_close:
+	os_close_file(new);
+	return(err);
+}
+
+/*
+ * 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:
+ */