Annotation of prex-old/usr/server/proc/tty.c, Revision 1.1
1.1 ! nbrk 1: /*
! 2: * Copyright (c) 2007, Kohsuke Ohtani
! 3: * All rights reserved.
! 4: *
! 5: * Redistribution and use in source and binary forms, with or without
! 6: * modification, are permitted provided that the following conditions
! 7: * are met:
! 8: * 1. Redistributions of source code must retain the above copyright
! 9: * notice, this list of conditions and the following disclaimer.
! 10: * 2. Redistributions in binary form must reproduce the above copyright
! 11: * notice, this list of conditions and the following disclaimer in the
! 12: * documentation and/or other materials provided with the distribution.
! 13: * 3. Neither the name of the author nor the names of any co-contributors
! 14: * may be used to endorse or promote products derived from this software
! 15: * without specific prior written permission.
! 16: *
! 17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
! 18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
! 21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 27: * SUCH DAMAGE.
! 28: */
! 29:
! 30: #include <prex/prex.h>
! 31: #include <server/proc.h>
! 32: #include <sys/list.h>
! 33: #include <sys/ioctl.h>
! 34:
! 35: #include <unistd.h>
! 36: #include <errno.h>
! 37: #include <stdlib.h>
! 38: #include <signal.h>
! 39:
! 40: #include "proc.h"
! 41:
! 42: static device_t ttydev;
! 43:
! 44: static void
! 45: tty_signal(int code)
! 46: {
! 47: pid_t pid;
! 48:
! 49: if (device_ioctl(ttydev, TIOCGPGRP, (u_long)&pid) != 0)
! 50: return;
! 51: kill_pg(pid, code);
! 52: }
! 53:
! 54: static void
! 55: exception_handler(int code, void *regs)
! 56: {
! 57: /*
! 58: * Handle signals from tty input.
! 59: */
! 60: switch (code) {
! 61: case SIGINT:
! 62: case SIGQUIT:
! 63: case SIGTSTP:
! 64: case SIGTTIN:
! 65: case SIGTTOU:
! 66: case SIGINFO:
! 67: case SIGWINCH:
! 68: case SIGIO:
! 69: if (ttydev != DEVICE_NULL)
! 70: tty_signal(code);
! 71: break;
! 72: }
! 73: exception_return(regs);
! 74: }
! 75:
! 76: void
! 77: tty_init(void)
! 78: {
! 79: task_t self;
! 80:
! 81: /*
! 82: * Setup exception to recieve signals from tty.
! 83: */
! 84: exception_setup(exception_handler);
! 85:
! 86: if (device_open("tty", 0, &ttydev) != 0)
! 87: ttydev = DEVICE_NULL;
! 88: else {
! 89: self = task_self();
! 90: device_ioctl(ttydev, TIOCSETSIGT, (u_long)&self);
! 91: }
! 92: }
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