/*
* Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <termios.h>
#include <signal.h>
#include <sched.h>
#include <sys/socket.h>
#include "kern_util.h"
#include "chan_user.h"
#include "user.h"
#include "os.h"
#include "xterm.h"
struct xterm_chan {
int pid;
int helper_pid;
char *title;
int device;
int raw;
struct termios tt;
unsigned long stack;
int direct_rcv;
};
/* Not static because it's called directly by the tt mode gdb code */
void *xterm_init(char *str, int device, const struct chan_opts *opts)
{
struct xterm_chan *data;
data = malloc(sizeof(*data));
if(data == NULL) return(NULL);
*data = ((struct xterm_chan) { .pid = -1,
.helper_pid = -1,
.device = device,
.title = opts->xterm_title,
.raw = opts->raw,
.stack = opts->tramp_stack,
.direct_rcv = !opts->in_kernel } );
return(data);
}
/* Only changed by xterm_setup, which is a setup */
static char *terminal_emulator = "xterm";
static char *title_switch = "-T";
static char *exec_switch = "-e";
static int __init xterm_setup(char *line, int *add)
{
*add = 0;
terminal_emulator = line;
line = strchr(line, ',');
if(line == NULL) return(0);
*line++ = '\0';
if(*line) title_switch = line;
line = strchr(line, ',');
if(line == NULL) return(0);
*line++ = '\0';
if(*line) exec_switch = line;
return(0);
}
__uml_setup("xterm=", xterm_setup,
"xterm=<terminal emulator>,<title switch>,<exec switch>\n"
" Specifies an alternate terminal emulator to use for the debugger,\n"
" consoles, and serial lines when they are attached to the xterm channel.\n"
" The values are the terminal emulator binary, the switch it uses to set\n"
" its title, and the switch it uses to execute a subprocess,\n"
" respectively. The title switch must have the form '<switch> title',\n"
" not '<switch>=title'. Similarly, the exec switch must have the form\n"
" '<switch> command arg1 arg2 ...'.\n"
" The default values are 'xterm=xterm,-T,-e'. Values for gnome-terminal\n"
" are 'xterm=gnome-terminal,-t,-x'.\n\n"
);
/* XXX This badly needs some cleaning up in the error paths
* Not static because it's called directly by the tt mode gdb code
*/
int xterm_open(int input, int output, int primary, void *d,
char **dev_out)
{
struct xterm_chan *data = d;
unsigned long stack;
int pid, fd, new, err;
char title[256], file[] = "/tmp/xterm-pipeXXXXXX";
char *argv[] = { terminal_emulator, title_switch, title, exec_switch,
"/usr/lib/uml/port-helper", "-uml-socket",
file, NULL };
if(os_access(argv[4], OS_ACC_X_OK) < 0)
argv[4] = "port-helper";
/* Check that DISPLAY is set, this doesn't guarantee the xterm
* will work but w/o it we can be pretty sure it won't. */
if (!getenv("DISPLAY")) {
printk("xterm_open: $DISPLAY not set.\n");
return -ENODEV;
}
fd = mkstemp(file);
if(fd < 0){
err = -errno;
printk("xterm_open : mkstemp failed, errno = %d\n", errno);
return err;
}
if(unlink(file)){
err = -errno;
printk("xterm_open : unlink failed, errno = %d\n", errno);
return err;
}
os_close_file(fd);
fd = os_create_unix_socket(file, sizeof(file), 1);
if(fd < 0){
printk("xterm_open : create_unix_socket failed, errno = %d\n",
-fd);
return(fd);
}
sprintf(title, data->title, data->device);
stack = data->stack;
pid = run_helper(NULL, NULL, argv, &stack);
if(pid < 0){
printk("xterm_open : run_helper failed, errno = %d\n", -pid);
return(pid);
}
if (data->direct_rcv) {
new = os_rcv_fd(fd, &data->helper_pid);
} else {
err = os_set_fd_block(fd, 0);
if(err < 0){
printk("xterm_open : failed to set descriptor "
"non-blocking, err = %d\n", -err);
return(err);
}
new = xterm_fd(fd, &data->helper_pid);
}
if(new < 0){
printk("xterm_open : os_rcv_fd failed, err = %d\n", -new);
goto out;
}
CATCH_EINTR(err = tcgetattr(new, &data->tt));
if(err){
new = err;
goto out;
}
if(data->raw){
err = raw(new);
if(err){
new = err;
goto out;
}
}
data->pid = pid;
*dev_out = NULL;
out:
unlink(file);
return(new);
}
/* Not static because it's called directly by the tt mode gdb code */
void xterm_close(int fd, void *d)
{
struct xterm_chan *data = d;
if(data->pid != -1)
os_kill_process(data->pid, 1);
data->pid = -1;
if(data->helper_pid != -1)
os_kill_process(data->helper_pid, 0);
data->helper_pid = -1;
os_close_file(fd);
}
static void xterm_free(void *d)
{
free(d);
}
const struct chan_ops xterm_ops = {
.type = "xterm",
.init = xterm_init,
.open = xterm_open,
.close = xterm_close,
.read = generic_read,
.write = generic_write,
.console_write = generic_console_write,
.window_size = generic_window_size,
.free = xterm_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:
*/
