freebsd-dev/usr.sbin/ppp/sig.c
Brian Somers 927145be97 Overhaul ppp:
o Use syslog
  o Remove references to stdout/stderr (incl perror())
  o Introduce VarTerm - the interactive terminal or zero
  o Allow "set timeout" to affect current session
  o Change "set debug" to "set log"
  o Allow "set log [+|-]flag"
  o Make MSEXT and PASSWDAUTH stuff the default
  o Move all #ifdef DEBUG stuff into the code - this
    shouldn't be too much overhead.  It's now controlled
    with "set log +debug"
  o Add "set log command, debug, tun, warn, error, alert"
  o Remove cdefs.h, and assume an ansi compiler.
  o Improve all diagnostic output
  o Don't trap SIGSEGV
  o SIGHUP now terminates again (log files are controlled
    by syslog)
  o Call CloseModem() when changing devices
  o Fix parsing of third arg of "delete"

I think this fixes the "magic is same" problems that some
people have been experiencing.
The man page is being rewritten.  It'll follow soon.
1997-06-09 03:27:43 +00:00

96 lines
2.9 KiB
C

/*-
* Copyright (c) 1997
* Brian Somers <brian@awfulhak.demon.co.uk>. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: sig.c,v 1.6 1997/03/13 12:45:33 brian Exp $
*
* TODO:
*
*/
#include "sig.h"
#include <sys/types.h>
#include <signal.h>
#include "mbuf.h"
#include "log.h"
static caused[NSIG]; /* An array of pending signals */
static sig_type handler[NSIG]; /* all start at SIG_DFL */
/* Record a signal in the "caused" array */
static void signal_recorder(int sig) {
caused[sig-1]++;
}
/*
set up signal_recorder, and record handler as the function to ultimately
call in handle_signal()
*/
sig_type pending_signal(int sig,sig_type fn) {
sig_type Result;
if (sig <= 0 || sig > NSIG) {
/* Oops - we must be a bit out of date (too many sigs ?) */
LogPrintf(LogALERT, "Eeek! %s:%s: I must be out of date!\n",
__FILE__,__LINE__);
return signal(sig,fn);
}
Result = handler[sig-1];
if (fn == SIG_DFL || fn == SIG_IGN) {
signal(sig,fn);
handler[sig-1] = (sig_type)0;
} else {
handler[sig-1] = fn;
signal(sig,signal_recorder);
}
caused[sig-1] = 0;
return Result;
}
/* Call the handlers for any pending signals */
void handle_signals() {
int sig;
int got;
do {
got = 0;
for (sig = 0; sig < NSIG; sig++)
if (caused[sig]) {
caused[sig]--;
got++;
(*handler[sig])(sig+1);
}
} while(got);
}