109 lines
2.3 KiB
C
109 lines
2.3 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
|
||
|
|
* Licensed under the GPL
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <termios.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include "user.h"
|
||
|
|
#include "user_util.h"
|
||
|
|
#include "chan_user.h"
|
||
|
|
|
||
|
|
struct fd_chan {
|
||
|
|
int fd;
|
||
|
|
int raw;
|
||
|
|
struct termios tt;
|
||
|
|
char str[sizeof("1234567890\0")];
|
||
|
|
};
|
||
|
|
|
||
|
|
static void *fd_init(char *str, int device, struct chan_opts *opts)
|
||
|
|
{
|
||
|
|
struct fd_chan *data;
|
||
|
|
char *end;
|
||
|
|
int n;
|
||
|
|
|
||
|
|
if(*str != ':'){
|
||
|
|
printk("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("fd_init : couldn't parse file descriptor '%s'\n", str);
|
||
|
|
return(NULL);
|
||
|
|
}
|
||
|
|
data = um_kmalloc(sizeof(*data));
|
||
|
|
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)){
|
||
|
|
CATCH_EINTR(err = tcsetattr(fd, TCSAFLUSH, &data->tt));
|
||
|
|
if(err)
|
||
|
|
printk("Failed to restore terminal state - "
|
||
|
|
"errno = %d\n", -err);
|
||
|
|
data->raw = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int fd_console_write(int fd, const char *buf, int n, void *d)
|
||
|
|
{
|
||
|
|
struct fd_chan *data = d;
|
||
|
|
|
||
|
|
return(generic_console_write(fd, buf, n, &data->tt));
|
||
|
|
}
|
||
|
|
|
||
|
|
struct chan_ops fd_ops = {
|
||
|
|
.type = "fd",
|
||
|
|
.init = fd_init,
|
||
|
|
.open = fd_open,
|
||
|
|
.close = fd_close,
|
||
|
|
.read = generic_read,
|
||
|
|
.write = generic_write,
|
||
|
|
.console_write = fd_console_write,
|
||
|
|
.window_size = generic_window_size,
|
||
|
|
.free = generic_free,
|
||
|
|
.winch = 1,
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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:
|
||
|
|
*/
|