Annotation of prex-old/usr/server/proc/tty.c, Revision 1.1.1.1
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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