![Jeff Dike](/assets/img/avatar_default.png)
The serial UML OS-abstraction layer patch (um/kernel dir). This moves all systemcalls from helper.c file under os-Linux dir Signed-off-by: Gennady Sharapov <Gennady.V.Sharapov@intel.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
225 lines
4.3 KiB
C
225 lines
4.3 KiB
C
/*
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* Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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#include <stdio.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <termios.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <netinet/in.h>
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#include "user_util.h"
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#include "kern_util.h"
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#include "user.h"
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#include "chan_user.h"
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#include "port.h"
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#include "os.h"
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struct port_chan {
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int raw;
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struct termios tt;
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void *kernel_data;
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char dev[sizeof("32768\0")];
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};
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static void *port_init(char *str, int device, struct chan_opts *opts)
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{
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struct port_chan *data;
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void *kern_data;
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char *end;
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int port;
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if(*str != ':'){
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printk("port_init : channel type 'port' must specify a "
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"port number\n");
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return(NULL);
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}
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str++;
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port = strtoul(str, &end, 0);
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if((*end != '\0') || (end == str)){
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printk("port_init : couldn't parse port '%s'\n", str);
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return(NULL);
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}
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kern_data = port_data(port);
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if(kern_data == NULL)
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return(NULL);
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data = um_kmalloc(sizeof(*data));
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if(data == NULL)
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goto err;
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*data = ((struct port_chan) { .raw = opts->raw,
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.kernel_data = kern_data });
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sprintf(data->dev, "%d", port);
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return(data);
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err:
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port_kern_free(kern_data);
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return(NULL);
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}
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static void port_free(void *d)
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{
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struct port_chan *data = d;
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port_kern_free(data->kernel_data);
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kfree(data);
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}
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static int port_open(int input, int output, int primary, void *d,
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char **dev_out)
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{
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struct port_chan *data = d;
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int fd, err;
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fd = port_wait(data->kernel_data);
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if((fd >= 0) && data->raw){
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CATCH_EINTR(err = tcgetattr(fd, &data->tt));
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if(err)
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return(err);
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err = raw(fd);
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if(err)
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return(err);
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}
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*dev_out = data->dev;
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return(fd);
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}
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static void port_close(int fd, void *d)
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{
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struct port_chan *data = d;
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port_remove_dev(data->kernel_data);
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os_close_file(fd);
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}
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static int port_console_write(int fd, const char *buf, int n, void *d)
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{
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struct port_chan *data = d;
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return(generic_console_write(fd, buf, n, &data->tt));
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}
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struct chan_ops port_ops = {
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.type = "port",
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.init = port_init,
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.open = port_open,
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.close = port_close,
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.read = generic_read,
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.write = generic_write,
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.console_write = port_console_write,
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.window_size = generic_window_size,
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.free = port_free,
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.winch = 1,
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};
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int port_listen_fd(int port)
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{
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struct sockaddr_in addr;
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int fd, err, arg;
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fd = socket(PF_INET, SOCK_STREAM, 0);
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if(fd == -1)
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return(-errno);
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arg = 1;
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if(setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &arg, sizeof(arg)) < 0){
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err = -errno;
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goto out;
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}
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addr.sin_family = AF_INET;
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addr.sin_port = htons(port);
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addr.sin_addr.s_addr = htonl(INADDR_ANY);
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if(bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0){
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err = -errno;
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goto out;
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}
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if(listen(fd, 1) < 0){
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err = -errno;
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goto out;
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}
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err = os_set_fd_block(fd, 0);
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if(err < 0)
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goto out;
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return(fd);
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out:
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os_close_file(fd);
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return(err);
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}
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struct port_pre_exec_data {
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int sock_fd;
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int pipe_fd;
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};
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void port_pre_exec(void *arg)
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{
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struct port_pre_exec_data *data = arg;
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dup2(data->sock_fd, 0);
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dup2(data->sock_fd, 1);
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dup2(data->sock_fd, 2);
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os_close_file(data->sock_fd);
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dup2(data->pipe_fd, 3);
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os_shutdown_socket(3, 1, 0);
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os_close_file(data->pipe_fd);
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}
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int port_connection(int fd, int *socket, int *pid_out)
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{
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int new, err;
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char *argv[] = { "/usr/sbin/in.telnetd", "-L",
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"/usr/lib/uml/port-helper", NULL };
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struct port_pre_exec_data data;
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new = os_accept_connection(fd);
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if(new < 0)
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return(new);
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err = os_pipe(socket, 0, 0);
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if(err < 0)
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goto out_close;
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data = ((struct port_pre_exec_data)
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{ .sock_fd = new,
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.pipe_fd = socket[1] });
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err = run_helper(port_pre_exec, &data, argv, NULL);
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if(err < 0)
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goto out_shutdown;
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*pid_out = err;
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return(new);
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out_shutdown:
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os_shutdown_socket(socket[0], 1, 1);
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os_close_file(socket[0]);
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os_shutdown_socket(socket[1], 1, 1);
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os_close_file(socket[1]);
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out_close:
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os_close_file(new);
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return(err);
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}
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/*
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* Overrides for Emacs so that we follow Linus's tabbing style.
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* Emacs will notice this stuff at the end of the file and automatically
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* adjust the settings for this buffer only. This must remain at the end
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* of the file.
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* ---------------------------------------------------------------------------
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* Local variables:
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* c-file-style: "linux"
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* End:
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*/
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