/* * 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_util.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: */