2 * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
3 * Licensed under the GPL
13 #include <sys/ioctl.h>
14 #include <sys/socket.h>
15 #include "kern_util.h"
16 #include "user_util.h"
17 #include "chan_user.h"
21 #include "choose-mode.h"
24 int generic_console_write(int fd, const char *buf, int n, void *unused)
26 struct termios save, new;
33 tcsetattr(fd, TCSAFLUSH, &new);
35 err = generic_write(fd, buf, n, NULL);
36 if(isatty(fd)) tcsetattr(fd, TCSAFLUSH, &save);
40 static void winch_handler(int sig)
50 static int winch_thread(void *arg)
52 struct winch_data *data = arg;
58 os_close_file(data->close_me);
59 pty_fd = data->pty_fd;
60 pipe_fd = data->pipe_fd;
61 count = os_write_file(pipe_fd, &c, sizeof(c));
62 if(count != sizeof(c))
63 printk("winch_thread : failed to write synchronization "
64 "byte, err = %d\n", -count);
66 signal(SIGWINCH, winch_handler);
68 sigdelset(&sigs, SIGWINCH);
69 if(sigprocmask(SIG_SETMASK, &sigs, NULL) < 0){
70 printk("winch_thread : sigprocmask failed, errno = %d\n",
76 printk("winch_thread : setsid failed, errno = %d\n", errno);
80 err = os_new_tty_pgrp(pty_fd, os_getpid());
82 printk("winch_thread : new_tty_pgrp failed, err = %d\n", -err);
86 count = os_read_file(pipe_fd, &c, sizeof(c));
87 if(count != sizeof(c))
88 printk("winch_thread : failed to read synchronization byte, "
89 "err = %d\n", -count);
94 count = os_write_file(pipe_fd, &c, sizeof(c));
95 if(count != sizeof(c))
96 printk("winch_thread : write failed, err = %d\n",
101 static int winch_tramp(int fd, void *device_data, int *fd_out)
103 struct winch_data data;
105 int fds[2], pid, n, err;
108 err = os_pipe(fds, 1, 1);
110 printk("winch_tramp : os_pipe failed, err = %d\n", -err);
114 data = ((struct winch_data) { .pty_fd = fd,
116 .close_me = fds[0] } );
117 pid = run_helper_thread(winch_thread, &data, 0, &stack, 0);
119 printk("fork of winch_thread failed - errno = %d\n", errno);
123 os_close_file(fds[1]);
125 n = os_read_file(fds[0], &c, sizeof(c));
127 printk("winch_tramp : failed to read synchronization byte\n");
128 printk("read failed, err = %d\n", -n);
129 printk("fd %d will not support SIGWINCH\n", fd);
135 void register_winch(int fd, void *device_data)
137 int pid, thread, thread_fd;
145 if(!CHOOSE_MODE_PROC(is_tracer_winch, is_skas_winch, pid, fd,
146 device_data) && (pid == -1)){
147 thread = winch_tramp(fd, device_data, &thread_fd);
149 register_winch_irq(thread_fd, fd, thread, device_data);
151 count = os_write_file(thread_fd, &c, sizeof(c));
152 if(count != sizeof(c))
153 printk("register_winch : failed to write "
154 "synchronization byte, err = %d\n",
161 * Overrides for Emacs so that we follow Linus's tabbing style.
162 * Emacs will notice this stuff at the end of the file and automatically
163 * adjust the settings for this buffer only. This must remain at the end
165 * ---------------------------------------------------------------------------
167 * c-file-style: "linux"