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186
common/bsd.c
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186
common/bsd.c
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/************************************************************************
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* IRC - Internet Relay Chat, common/bsd.c
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* Copyright (C) 1990 Jarkko Oikarinen and
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* University of Oulu, Computing Center
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 1, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)bsd.c 2.14 1/30/94 (C) 1988 University of Oulu, \
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Computing Center and Jarkko Oikarinen";
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#endif
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#include "struct.h"
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#include "common.h"
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#include "sys.h"
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#include "h.h"
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#include <signal.h>
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extern int errno; /* ...seems that errno.h doesn't define this everywhere */
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#if !defined(__FreeBSD__) && !defined(__NetBSD__) && !defined(__bsdi__)
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extern char *sys_errlist[];
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#endif
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extern char *last_dead_comment;
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#ifdef DEBUGMODE
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int writecalls = 0, writeb[10] = {0,0,0,0,0,0,0,0,0,0};
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#endif
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VOIDSIG dummy()
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{
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#ifndef HAVE_RELIABLE_SIGNALS
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(void)signal(SIGALRM, dummy);
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(void)signal(SIGPIPE, dummy);
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#ifndef HPUX /* Only 9k/800 series require this, but don't know how to.. */
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# ifdef SIGWINCH
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(void)signal(SIGWINCH, dummy);
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# endif
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#endif
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#else
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# ifdef POSIX_SIGNALS
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struct sigaction act;
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act.sa_handler = dummy;
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act.sa_flags = 0;
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(void)sigemptyset(&act.sa_mask);
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(void)sigaddset(&act.sa_mask, SIGALRM);
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(void)sigaddset(&act.sa_mask, SIGPIPE);
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# ifdef SIGWINCH
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(void)sigaddset(&act.sa_mask, SIGWINCH);
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# endif
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(void)sigaction(SIGALRM, &act, (struct sigaction *)NULL);
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(void)sigaction(SIGPIPE, &act, (struct sigaction *)NULL);
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# ifdef SIGWINCH
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(void)sigaction(SIGWINCH, &act, (struct sigaction *)NULL);
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# endif
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# endif
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#endif
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}
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/*
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** deliver_it
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** Attempt to send a sequence of bytes to the connection.
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** Returns
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**
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** < 0 Some fatal error occurred, (but not EWOULDBLOCK).
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** This return is a request to close the socket and
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** clean up the link.
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**
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** >= 0 No real error occurred, returns the number of
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** bytes actually transferred. EWOULDBLOCK and other
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** possibly similar conditions should be mapped to
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** zero return. Upper level routine will have to
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** decide what to do with those unwritten bytes...
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**
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** *NOTE* alarm calls have been preserved, so this should
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** work equally well whether blocking or non-blocking
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** mode is used...
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**
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** We don't use blocking anymore, that is impossible with the
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** net.loads today anyway. Commented out the alarms to save cpu.
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** --Run
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*/
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int deliver_it(cptr, str, len)
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aClient *cptr;
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int len;
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char *str;
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{
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int retval;
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aClient *acpt = cptr->acpt;
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#ifdef DEBUGMODE
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writecalls++;
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#endif
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/* (void)alarm(WRITEWAITDELAY); Bullshit */
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#ifdef VMS
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retval = netwrite(cptr->fd, str, len);
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#else
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retval = send(cptr->fd, str, len, 0);
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/*
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** Convert WOULDBLOCK to a return of "0 bytes moved". This
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** should occur only if socket was non-blocking. Note, that
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** all is Ok, if the 'write' just returns '0' instead of an
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** error and errno=EWOULDBLOCK.
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**
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** ...now, would this work on VMS too? --msa
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*/
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if (retval < 0 && (errno == EWOULDBLOCK || errno == EAGAIN ||
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errno == ENOBUFS))
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{
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retval = 0;
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cptr->flags |= FLAGS_BLOCKED;
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}
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else if (retval > 0)
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{
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#ifdef pyr
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(void)gettimeofday(&cptr->lw, NULL);
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#endif
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cptr->flags &= ~FLAGS_BLOCKED;
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}
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#endif
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/* (void )alarm(0); */
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#ifdef DEBUGMODE
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if (retval < 0) {
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writeb[0]++;
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Debug((DEBUG_ERROR,"write error (%s) to %s",
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sys_errlist[errno], cptr->name));
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} else if (retval == 0)
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writeb[1]++;
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else if (retval < 16)
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writeb[2]++;
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else if (retval < 32)
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writeb[3]++;
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else if (retval < 64)
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writeb[4]++;
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else if (retval < 128)
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writeb[5]++;
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else if (retval < 256)
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writeb[6]++;
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else if (retval < 512)
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writeb[7]++;
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else if (retval < 1024)
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writeb[8]++;
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else
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writeb[9]++;
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#endif
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if (retval > 0)
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{
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cptr->sendB += retval;
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me.sendB += retval;
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if (cptr->sendB > 1023)
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{
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cptr->sendK += (cptr->sendB >> 10);
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cptr->sendB &= 0x03ff; /* 2^10 = 1024, 3ff = 1023 */
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}
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if (acpt != &me)
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{
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acpt->sendB += retval;
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if (acpt->sendB > 1023)
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{
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acpt->sendK += (acpt->sendB >> 10);
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acpt->sendB &= 0x03ff;
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}
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}
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else if (me.sendB > 1023)
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{
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me.sendK += (me.sendB >> 10);
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me.sendB &= 0x03ff;
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}
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}
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return(retval);
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}
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