blob: 93dc1911363ff3f7d3fd2a782fcf295fb1f0b80f [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
5
6#include <stdio.h>
7#include <stdlib.h>
8#include <unistd.h>
9#include <string.h>
10#include <errno.h>
11#include <termios.h>
12#include <signal.h>
13#include <sched.h>
14#include <sys/socket.h>
15#include "kern_util.h"
16#include "chan_user.h"
17#include "helper.h"
18#include "user_util.h"
19#include "user.h"
20#include "os.h"
21#include "xterm.h"
22
23struct xterm_chan {
24 int pid;
25 int helper_pid;
26 char *title;
27 int device;
28 int raw;
29 struct termios tt;
30 unsigned long stack;
31 int direct_rcv;
32};
33
34/* Not static because it's called directly by the tt mode gdb code */
35void *xterm_init(char *str, int device, struct chan_opts *opts)
36{
37 struct xterm_chan *data;
38
39 data = malloc(sizeof(*data));
40 if(data == NULL) return(NULL);
41 *data = ((struct xterm_chan) { .pid = -1,
42 .helper_pid = -1,
43 .device = device,
44 .title = opts->xterm_title,
45 .raw = opts->raw,
46 .stack = opts->tramp_stack,
47 .direct_rcv = !opts->in_kernel } );
48 return(data);
49}
50
51/* Only changed by xterm_setup, which is a setup */
52static char *terminal_emulator = "xterm";
53static char *title_switch = "-T";
54static char *exec_switch = "-e";
55
56static int __init xterm_setup(char *line, int *add)
57{
58 *add = 0;
59 terminal_emulator = line;
60
61 line = strchr(line, ',');
62 if(line == NULL) return(0);
63 *line++ = '\0';
64 if(*line) title_switch = line;
65
66 line = strchr(line, ',');
67 if(line == NULL) return(0);
68 *line++ = '\0';
69 if(*line) exec_switch = line;
70
71 return(0);
72}
73
74__uml_setup("xterm=", xterm_setup,
75"xterm=<terminal emulator>,<title switch>,<exec switch>\n"
76" Specifies an alternate terminal emulator to use for the debugger,\n"
77" consoles, and serial lines when they are attached to the xterm channel.\n"
78" The values are the terminal emulator binary, the switch it uses to set\n"
79" its title, and the switch it uses to execute a subprocess,\n"
80" respectively. The title switch must have the form '<switch> title',\n"
81" not '<switch>=title'. Similarly, the exec switch must have the form\n"
82" '<switch> command arg1 arg2 ...'.\n"
83" The default values are 'xterm=xterm,-T,-e'. Values for gnome-terminal\n"
84" are 'xterm=gnome-terminal,-t,-x'.\n\n"
85);
86
87/* XXX This badly needs some cleaning up in the error paths
88 * Not static because it's called directly by the tt mode gdb code
89 */
90int xterm_open(int input, int output, int primary, void *d,
91 char **dev_out)
92{
93 struct xterm_chan *data = d;
94 unsigned long stack;
95 int pid, fd, new, err;
96 char title[256], file[] = "/tmp/xterm-pipeXXXXXX";
97 char *argv[] = { terminal_emulator, title_switch, title, exec_switch,
98 "/usr/lib/uml/port-helper", "-uml-socket",
99 file, NULL };
100
101 if(os_access(argv[4], OS_ACC_X_OK) < 0)
102 argv[4] = "port-helper";
103
104 /* Check that DISPLAY is set, this doesn't guarantee the xterm
105 * will work but w/o it we can be pretty sure it won't. */
106 if (!getenv("DISPLAY")) {
107 printk("xterm_open: $DISPLAY not set.\n");
108 return -ENODEV;
109 }
110
111 fd = mkstemp(file);
112 if(fd < 0){
113 printk("xterm_open : mkstemp failed, errno = %d\n", errno);
114 return(-errno);
115 }
116
117 if(unlink(file)){
118 printk("xterm_open : unlink failed, errno = %d\n", errno);
119 return(-errno);
120 }
121 os_close_file(fd);
122
123 fd = os_create_unix_socket(file, sizeof(file), 1);
124 if(fd < 0){
125 printk("xterm_open : create_unix_socket failed, errno = %d\n",
126 -fd);
127 return(fd);
128 }
129
130 sprintf(title, data->title, data->device);
131 stack = data->stack;
132 pid = run_helper(NULL, NULL, argv, &stack);
133 if(pid < 0){
134 printk("xterm_open : run_helper failed, errno = %d\n", -pid);
135 return(pid);
136 }
137
138 if(data->stack == 0) free_stack(stack, 0);
139
140 if (data->direct_rcv) {
141 new = os_rcv_fd(fd, &data->helper_pid);
142 } else {
143 err = os_set_fd_block(fd, 0);
144 if(err < 0){
145 printk("xterm_open : failed to set descriptor "
146 "non-blocking, err = %d\n", -err);
147 return(err);
148 }
149 new = xterm_fd(fd, &data->helper_pid);
150 }
151 if(new < 0){
152 printk("xterm_open : os_rcv_fd failed, err = %d\n", -new);
153 goto out;
154 }
155
156 CATCH_EINTR(err = tcgetattr(new, &data->tt));
157 if(err){
158 new = err;
159 goto out;
160 }
161
162 if(data->raw){
163 err = raw(new);
164 if(err){
165 new = err;
166 goto out;
167 }
168 }
169
170 data->pid = pid;
171 *dev_out = NULL;
172 out:
173 unlink(file);
174 return(new);
175}
176
177/* Not static because it's called directly by the tt mode gdb code */
178void xterm_close(int fd, void *d)
179{
180 struct xterm_chan *data = d;
181
182 if(data->pid != -1)
183 os_kill_process(data->pid, 1);
184 data->pid = -1;
185 if(data->helper_pid != -1)
186 os_kill_process(data->helper_pid, 0);
187 data->helper_pid = -1;
188 os_close_file(fd);
189}
190
191static void xterm_free(void *d)
192{
193 free(d);
194}
195
196static int xterm_console_write(int fd, const char *buf, int n, void *d)
197{
198 struct xterm_chan *data = d;
199
200 return(generic_console_write(fd, buf, n, &data->tt));
201}
202
203struct chan_ops xterm_ops = {
204 .type = "xterm",
205 .init = xterm_init,
206 .open = xterm_open,
207 .close = xterm_close,
208 .read = generic_read,
209 .write = generic_write,
210 .console_write = xterm_console_write,
211 .window_size = generic_window_size,
212 .free = xterm_free,
213 .winch = 1,
214};
215
216/*
217 * Overrides for Emacs so that we follow Linus's tabbing style.
218 * Emacs will notice this stuff at the end of the file and automatically
219 * adjust the settings for this buffer only. This must remain at the end
220 * of the file.
221 * ---------------------------------------------------------------------------
222 * Local variables:
223 * c-file-style: "linux"
224 * End:
225 */