18ccc9b90c
wrappers for err, errx, warn and warnx respectively when running in foreground and call syslog functions when running in daemon mode. Also add and use an extra log_info function for other types of information.
560 lines
14 KiB
C
560 lines
14 KiB
C
/* $NetBSD: wsmoused.c,v 1.13 2003/08/06 23:58:40 jmmv Exp $ */
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/*
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* Copyright (c) 2002, 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Julio M. Merino Vidal.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. The name authors may not be used to endorse or promote products
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* derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 2002, 2003\n"
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"The NetBSD Foundation, Inc. All rights reserved.\n");
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__RCSID("$NetBSD: wsmoused.c,v 1.13 2003/08/06 23:58:40 jmmv Exp $");
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#endif /* not lint */
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#include <sys/ioctl.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/tty.h>
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#include <dev/wscons/wsconsio.h>
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#include <err.h>
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#include <fcntl.h>
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#include <poll.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <unistd.h>
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#include <util.h>
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#include "pathnames.h"
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#include "wsmoused.h"
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/* --------------------------------------------------------------------- */
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/*
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* Global variables.
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*/
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static struct mouse Mouse;
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static char *Pid_File = NULL;
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static int Foreground = 1;
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static int X_Console = -1;
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#ifdef WSMOUSED_SELECTION_MODE
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extern struct mode_bootstrap Action_Mode;
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#endif
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#ifdef WSMOUSED_SELECTION_MODE
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extern struct mode_bootstrap Selection_Mode;
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#endif
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#define MAX_MODES 2
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static struct mode_bootstrap *Modes[MAX_MODES];
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static struct mode_bootstrap *Avail_Modes[] = {
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#ifdef WSMOUSED_ACTION_MODE
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&Action_Mode,
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#endif
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#ifdef WSMOUSED_SELECTION_MODE
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&Selection_Mode,
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#endif
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};
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/* --------------------------------------------------------------------- */
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/*
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* Prototypes for functions private to this module.
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*/
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static void usage(void);
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static void open_device(unsigned int);
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static void init_mouse(void);
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static void event_loop(void);
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static void generic_wscons_event(struct wscons_event);
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static int attach_mode(const char *);
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static void attach_modes(char *);
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static void detach_mode(const char *);
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static void detach_modes(void);
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static void signal_terminate(int);
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int main(int, char **);
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/* --------------------------------------------------------------------- */
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/* Shows program usage information and exits. */
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static void
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usage(void)
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{
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(void)fprintf(stderr,
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"Usage: %s [-d device] [-f config_file] [-m modes] [-n]\n",
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getprogname());
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exit(EXIT_FAILURE);
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}
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/* --------------------------------------------------------------------- */
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/* Logs the given error message to syslog if running in daemon mode, or
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* to the console if running in the foreground. */
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void
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log_err(int e, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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if (Foreground)
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verr(e, fmt, ap);
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else {
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int olderrno = errno;
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vsyslog(LOG_DAEMON | LOG_ERR, fmt, ap);
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errno = olderrno;
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syslog(LOG_DAEMON | LOG_ERR, "%m");
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exit(e);
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}
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/* NOTREACHED */
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va_end(ap);
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}
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/* --------------------------------------------------------------------- */
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/* Logs the given error message to syslog if running in daemon mode, or
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* to the console if running in the foreground. */
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void
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log_errx(int e, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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if (Foreground)
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verrx(e, fmt, ap);
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else {
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vsyslog(LOG_DAEMON | LOG_ERR, fmt, ap);
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exit(e);
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}
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/* NOTREACHED */
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va_end(ap);
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}
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/* --------------------------------------------------------------------- */
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/* Logs the given info message to syslog if running in daemon mode, or
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* to the console if running in the foreground. */
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void
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log_info(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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if (Foreground)
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vfprintf(stderr, fmt, ap);
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else
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vsyslog(LOG_DAEMON | LOG_INFO, fmt, ap);
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va_end(ap);
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}
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/* --------------------------------------------------------------------- */
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/* Logs the given warning message to syslog if running in daemon mode, or
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* to the console if running in the foreground. */
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void
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log_warn(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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if (Foreground)
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vwarn(fmt, ap);
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else {
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int olderrno = errno;
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vsyslog(LOG_DAEMON | LOG_WARNING, fmt, ap);
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errno = olderrno;
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syslog(LOG_DAEMON | LOG_WARNING, "%m");
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}
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va_end(ap);
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}
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/* --------------------------------------------------------------------- */
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/* Logs the given warning message to syslog if running in daemon mode, or
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* to the console if running in the foreground. */
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void
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log_warnx(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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if (Foreground)
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vwarnx(fmt, ap);
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else
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vsyslog(LOG_DAEMON | LOG_WARNING, fmt, ap);
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va_end(ap);
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}
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/* --------------------------------------------------------------------- */
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/* Initializes mouse information. Basically, it opens required files
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* for the daemon to work. */
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static void
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init_mouse(void)
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{
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Mouse.m_devfd = -1;
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open_device(0);
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/* Open FIFO, if wanted */
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Mouse.m_fifofd = -1;
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if (Mouse.m_fifoname != NULL) {
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Mouse.m_fifofd = open(Mouse.m_fifoname,
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O_RDWR | O_NONBLOCK, 0);
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if (Mouse.m_fifofd == -1)
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log_err(EXIT_FAILURE, "cannot open %s",
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Mouse.m_fifoname);
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}
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}
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/* --------------------------------------------------------------------- */
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/* Opens the mouse device (if not already opened). The argument `secs'
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* specifies how much seconds the function will wait before trying to
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* open the device; this is used when returning from the X console. */
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static void
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open_device(unsigned int secs)
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{
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if (Mouse.m_devfd != -1)
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return;
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sleep(secs);
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/* Open mouse file descriptor */
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Mouse.m_devfd = open(Mouse.m_devname, O_RDONLY | O_NONBLOCK, 0);
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if (Mouse.m_devfd == -1)
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log_err(EXIT_FAILURE, "cannot open %s", Mouse.m_devname);
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}
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/* --------------------------------------------------------------------- */
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/* Main program event loop. This function polls the wscons status
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* device and the mouse device; whenever an event is received, the
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* appropiate callback is fired for all attached modes. If the polls
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* times out (which only appens when the mouse is disabled), another
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* callback is launched. */
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static void
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event_loop(void)
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{
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int i, res;
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struct pollfd fds[2];
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struct wscons_event event;
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fds[0].fd = Mouse.m_statfd;
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fds[0].events = POLLIN;
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for (;;) {
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fds[1].fd = Mouse.m_devfd;
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fds[1].events = POLLIN;
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if (Mouse.m_disabled)
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res = poll(fds, 1, INFTIM);
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else
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res = poll(fds, 2, 300);
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if (res < 0)
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log_warn("failed to read from devices");
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if (fds[0].revents & POLLIN) {
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res = read(Mouse.m_statfd, &event, sizeof(event));
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if (res != sizeof(event))
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log_warn("failed to read from mouse stat");
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generic_wscons_event(event);
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for (i = 0; i < MAX_MODES && Modes[i] != NULL; i++)
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if (Modes[i]->mb_wscons_event != NULL)
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Modes[i]->mb_wscons_event(event);
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} else if (fds[1].revents & POLLIN) {
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res = read(Mouse.m_devfd, &event, sizeof(event));
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if (res != sizeof(event))
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log_warn("failed to read from mouse");
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if (Mouse.m_fifofd >= 0) {
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res = write(Mouse.m_fifofd, &event,
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sizeof(event));
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if (res != sizeof(event))
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log_warn("failed to write to fifo");
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}
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for (i = 0; i < MAX_MODES && Modes[i] != NULL; i++)
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if (Modes[i]->mb_wsmouse_event != NULL)
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Modes[i]->mb_wsmouse_event(event);
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} else {
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for (i = 0; i < MAX_MODES && Modes[i] != NULL; i++)
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if (Modes[i]->mb_poll_timeout != NULL)
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Modes[i]->mb_poll_timeout();
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}
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}
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}
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/* --------------------------------------------------------------------- */
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/* This function parses generic wscons status events. Actually, it
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* handles the screen switch event to enable or disable the mouse,
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* depending if we are entering or leaving the X console. */
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static void
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generic_wscons_event(struct wscons_event evt)
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{
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switch (evt.type) {
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case WSCONS_EVENT_SCREEN_SWITCH:
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if (evt.value == X_Console) {
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Mouse.m_disabled = 1;
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(void)close(Mouse.m_devfd);
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Mouse.m_devfd = -1;
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} else {
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if (Mouse.m_disabled) {
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open_device(5);
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Mouse.m_disabled = 0;
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} else {
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(void)close(Mouse.m_devfd);
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Mouse.m_devfd = -1;
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open_device(0);
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}
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}
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break;
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}
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}
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/* --------------------------------------------------------------------- */
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/* Attaches a mode to the list of active modes, based on its name.
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* Returns 1 on success or 0 if the mode fails to initialize or there is
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* any other problem. */
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static int
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attach_mode(const char *name)
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{
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int i, pos;
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struct mode_bootstrap *mb;
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for (i = 0, pos = -1; i < MAX_MODES; i++)
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if (Modes[i] == NULL) {
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pos = i;
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break;
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}
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if (pos == -1) {
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log_warnx("modes table full; cannot register `%s'", name);
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return 0;
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}
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for (i = 0; i < MAX_MODES; i++) {
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mb = Avail_Modes[i];
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if (mb != NULL && strcmp(name, mb->mb_name) == 0) {
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int res;
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res = mb->mb_startup(&Mouse);
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if (res == 0) {
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log_warnx("startup failed for `%s' mode",
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mb->mb_name);
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return 0;
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} else {
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Modes[pos] = mb;
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return 1;
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}
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}
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}
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log_warnx("unknown mode `%s' (see the `modes' directive)", name);
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return 0;
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}
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/* --------------------------------------------------------------------- */
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/* Attaches all modes given in the whitespace separated string `list'.
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* A fatal error is produced if no active modes can be attached. */
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static void
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attach_modes(char *list)
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{
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char *last, *p;
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int count;
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/* Attach all requested modes */
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(void)memset(&Modes, 0, sizeof(struct mode_bootstrap) * MAX_MODES);
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for (count = 0, (p = strtok_r(list, " ", &last)); p;
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(p = strtok_r(NULL, " ", &last))) {
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if (attach_mode(p))
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count++;
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}
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if (count == 0)
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log_errx(EXIT_FAILURE, "no active modes found; exiting...");
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}
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/* --------------------------------------------------------------------- */
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/* Detaches a mode from the active modes list based on its name. */
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static void
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detach_mode(const char *name)
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{
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int i;
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struct mode_bootstrap *mb;
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for (i = 0; i < MAX_MODES; i++) {
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mb = Modes[i];
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if (mb != NULL && strcmp(name, mb->mb_name) == 0) {
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int res;
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res = mb->mb_cleanup();
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if (res == 0) {
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log_warnx("cleanup failed for `%s' mode",
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mb->mb_name);
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return;
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} else {
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Modes[i] = NULL;
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return;
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}
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}
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}
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log_warnx("unknown mode `%s' (see the `modes' directive)", name);
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}
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/* --------------------------------------------------------------------- */
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/* Detaches all active modes. */
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static void
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detach_modes(void)
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{
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int i;
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for (i = 0; i < MAX_MODES && Modes[i] != NULL; i++)
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detach_mode(Modes[i]->mb_name);
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}
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/* --------------------------------------------------------------------- */
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/* Signal handler for close signals. The program can only be exited
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* through this function. */
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/* ARGSUSED */
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static void
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signal_terminate(int sig)
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{
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detach_modes();
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config_free();
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exit(EXIT_SUCCESS);
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}
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/* --------------------------------------------------------------------- */
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/* Main program. Parses command line options, reads the configuration
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* file, initializes the mouse and associated files and launches the main
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* event loop. */
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int
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main(int argc, char **argv)
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{
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char *conffile, *modelist, *tstat;
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int needconf, nodaemon, opt;
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struct block *conf;
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setprogname(argv[0]);
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(void)memset(&Mouse, 0, sizeof(struct mouse));
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conffile = _PATH_CONF;
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modelist = NULL;
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needconf = 0;
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nodaemon = -1;
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/* Parse command line options */
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while ((opt = getopt(argc, argv, "d:f:m:n")) != -1) {
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switch (opt) {
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case 'd': /* Mouse device name */
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Mouse.m_devname = optarg;
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break;
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case 'f': /* Configuration file name */
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needconf = 1;
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conffile = optarg;
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break;
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case 'm': /* List of modes to activate */
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modelist = optarg;
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break;
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case 'n': /* No daemon */
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nodaemon = 1;
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break;
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default:
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usage();
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/* NOTREACHED */
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}
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}
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/* Read the configuration file and get some basic properties */
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config_read(conffile, needconf);
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conf = config_get_mode("Global");
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if (nodaemon == -1)
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nodaemon = block_get_propval_int(conf, "nodaemon", 0);
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X_Console = block_get_propval_int(conf, "xconsole", -1);
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/* Open wsdisplay status device */
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tstat = block_get_propval(conf, "ttystat", _PATH_TTYSTAT);
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Mouse.m_statfd = open(tstat, O_RDONLY | O_NONBLOCK, 0);
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if (Mouse.m_statfd == -1)
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log_err(EXIT_FAILURE, "cannot open %s", tstat);
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/* Initialize mouse information and attach modes */
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if (Mouse.m_devname == NULL)
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Mouse.m_devname = block_get_propval(conf, "device",
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_PATH_DEFAULT_MOUSE);
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init_mouse();
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if (modelist != NULL)
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attach_modes(modelist);
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else
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attach_modes(block_get_propval(conf, "modes", "selection"));
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/* Setup signal handlers */
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(void)signal(SIGINT, signal_terminate);
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(void)signal(SIGKILL, signal_terminate);
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(void)signal(SIGQUIT, signal_terminate);
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(void)signal(SIGTERM, signal_terminate);
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if (!nodaemon) {
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/* Become a daemon */
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if (daemon(0, 0) == -1)
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log_err(EXIT_FAILURE, "failed to become a daemon");
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/* Create the pidfile, if wanted */
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Pid_File = block_get_propval(conf, "pidfile", NULL);
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if (pidfile(Pid_File) == -1)
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log_warn("pidfile %s", Pid_File);
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|
Foreground = 0;
|
|
}
|
|
|
|
event_loop();
|
|
|
|
/* NOTREACHED */
|
|
return EXIT_SUCCESS;
|
|
}
|