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