96 lines
1.9 KiB
C
96 lines
1.9 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
|
||
|
|
* Licensed under the GPL
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include <termios.h>
|
||
|
|
#include "chan_user.h"
|
||
|
|
#include <os.h>
|
||
|
|
#include <um_malloc.h>
|
||
|
|
|
||
|
|
struct fd_chan {
|
||
|
|
int fd;
|
||
|
|
int raw;
|
||
|
|
struct termios tt;
|
||
|
|
char str[sizeof("1234567890\0")];
|
||
|
|
};
|
||
|
|
|
||
|
|
static void *fd_init(char *str, int device, const struct chan_opts *opts)
|
||
|
|
{
|
||
|
|
struct fd_chan *data;
|
||
|
|
char *end;
|
||
|
|
int n;
|
||
|
|
|
||
|
|
if (*str != ':') {
|
||
|
|
printk(UM_KERN_ERR "fd_init : channel type 'fd' must specify a "
|
||
|
|
"file descriptor\n");
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
str++;
|
||
|
|
n = strtoul(str, &end, 0);
|
||
|
|
if ((*end != '\0') || (end == str)) {
|
||
|
|
printk(UM_KERN_ERR "fd_init : couldn't parse file descriptor "
|
||
|
|
"'%s'\n", str);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL);
|
||
|
|
if (data == NULL)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
*data = ((struct fd_chan) { .fd = n,
|
||
|
|
.raw = opts->raw });
|
||
|
|
return data;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int fd_open(int input, int output, int primary, void *d, char **dev_out)
|
||
|
|
{
|
||
|
|
struct fd_chan *data = d;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
if (data->raw && isatty(data->fd)) {
|
||
|
|
CATCH_EINTR(err = tcgetattr(data->fd, &data->tt));
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
err = raw(data->fd);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
sprintf(data->str, "%d", data->fd);
|
||
|
|
*dev_out = data->str;
|
||
|
|
return data->fd;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void fd_close(int fd, void *d)
|
||
|
|
{
|
||
|
|
struct fd_chan *data = d;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
if (!data->raw || !isatty(fd))
|
||
|
|
return;
|
||
|
|
|
||
|
|
CATCH_EINTR(err = tcsetattr(fd, TCSAFLUSH, &data->tt));
|
||
|
|
if (err)
|
||
|
|
printk(UM_KERN_ERR "Failed to restore terminal state - "
|
||
|
|
"errno = %d\n", -err);
|
||
|
|
data->raw = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
const struct chan_ops fd_ops = {
|
||
|
|
.type = "fd",
|
||
|
|
.init = fd_init,
|
||
|
|
.open = fd_open,
|
||
|
|
.close = fd_close,
|
||
|
|
.read = generic_read,
|
||
|
|
.write = generic_write,
|
||
|
|
.console_write = generic_console_write,
|
||
|
|
.window_size = generic_window_size,
|
||
|
|
.free = generic_free,
|
||
|
|
.winch = 1,
|
||
|
|
};
|