usr.bin/tip/libacu/acucommon.c

   1 /*
   2  * Copyright (c) 1986, 1993
   3  *      The Regents of the University of California.  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. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#)acucommon.c      8.1 (Berkeley) 6/6/93
  34  * $FreeBSD: src/usr.bin/tip/libacu/acucommon.c,v 1.3 1999/08/28 01:06:30 peter Exp $
  35  * $DragonFly: src/usr.bin/tip/libacu/acucommon.c,v 1.2 2003/06/17 04:29:32 dillon Exp $
  36  */
  37
  38 /*
  39  * Routines for calling up on a Courier modem.
  40  * Derived from Hayes driver.
  41  */
  42 #include "tipconf.h"
  43 #include "tip.h"
  44
  45 #include <err.h>
  46
  47 #if HAVE_SELECT
  48 #include <sys/types.h>
  49 #include <sys/times.h>
  50 #include <unistd.h>
  51
  52 void acu_nap (unsigned int how_long)
  53 {
  54         struct timeval t;
  55         t.tv_usec = (how_long % 1000) * 1000;
  56         t.tv_sec = how_long / 1000;
  57         (void) select (0, NULL, NULL, NULL, &t);
  58 }
  59
  60 #elif HAVE_USLEEP
  61 void acu_nap (unsigned int how_long)
  62 {
  63         (void) usleep (how_long * 1000);
  64 }
  65
  66 #else
  67
  68 /*
  69  * Code stolen from /usr/src/lib/libc/gen/sleep.c
  70  */
  71 #define mask(s) (1<<((s)-1))
  72 #define setvec(vec, a) \
  73         vec.sv_handler = a; vec.sv_mask = vec.sv_onstack = 0
  74
  75 static int ringring;
  76
  77 static void acunap_napx()
  78 {
  79         ringring = 1;
  80 }
  81
  82 void acu_nap (unsigned int how_long)
  83 {
  84                                 int omask;
  85         struct itimerval itv, oitv;
  86         register struct itimerval *itp = &itv;
  87         struct sigvec vec, ovec;
  88
  89         timerclear(&itp->it_interval);
  90         timerclear(&itp->it_value);
  91         if (setitimer(ITIMER_REAL, itp, &oitv) < 0)
  92                                         return;
  93         setvec(ovec, SIG_DFL);
  94         omask = sigblock(mask(SIGALRM));
  95         itp->it_value.tv_sec = how_long / 1000;
  96                                 itp->it_value.tv_usec = ((how_long % 1000) * 1000);
  97         setvec(vec, acunap_napx);
  98         ringring = 0;
  99         (void) sigvec(SIGALRM, &vec, &ovec);
 100         (void) setitimer(ITIMER_REAL, itp, (struct itimerval *)0);
 101         while (!ringring)
 102                                         sigpause(omask &~ mask(SIGALRM));
 103         (void) sigvec(SIGALRM, &ovec, (struct sigvec *)0);
 104         (void) setitimer(ITIMER_REAL, &oitv, (struct itimerval *)0);
 105                                 (void) sigsetmask(omask);
 106 }
 107
 108 #endif /* HAVE_USLEEP */
 109
 110 void acu_hw_flow_control (hw_flow_control)
 111 {
 112 #if HAVE_TERMIOS
 113         struct termios t;
 114         if (tcgetattr (FD, &t) == 0) {
 115                 if (hw_flow_control)
 116                         t.c_cflag |= CRTSCTS;
 117                 else
 118                         t.c_cflag &= ~CRTSCTS;
 119                 tcsetattr (FD, TCSANOW, &t);
 120         }
 121 #endif /* HAVE_TERMIOS */
 122 }
 123
 124 int acu_flush ()
 125 {
 126 #ifdef TIOCFLUSH
 127         int flags = 0;
 128         return (ioctl (FD, TIOCFLUSH, &flags) == 0);    /* flush any clutter */
 129 #elif !HAVE_TERMIOS
 130         struct sgttyb buf;
 131         return (ioctl (FD, TIOCGETP, &buf) == 0 && ioctl (FD, TIOCSETP, &buf) == 0);
 132 #endif
 133 }
 134
 135 int acu_getspeed ()
 136 {
 137 #if HAVE_TERMIOS
 138         struct termios term;
 139         tcgetattr (FD, &term);
 140         return (term.c_ospeed);
 141 #else /* HAVE_TERMIOS */
 142         struct sgttyb buf;
 143         ioctl (FD, TIOCGETP, &buf);
 144         return (buf.sg_ospeed);
 145 #endif
 146 }
 147
 148 int acu_setspeed (int speed)
 149 {
 150         int rc = 0;
 151 #if HAVE_TERMIOS
 152         struct termios term;
 153         if (tcgetattr (FD, &term) == 0) {
 154 #ifndef _POSIX_SOURCE
 155                 cfsetspeed (&term, speed);
 156 #else
 157                 cfsetispeed (&term, speed);
 158                 cfsetospeed (&term, speed);
 159 #endif
 160                 if (tcsetattr (FD, TCSANOW, &term) == 0)
 161                         ++rc;
 162         }
 163 #else /* HAVE TERMIOS */
 164         struct sgttyb sb;
 165         if (ioctl(FD, TIOCGETP, &sb) < 0) {
 166                 warn("TIOCGETP");
 167         }
 168         else {
 169                 sb.sg_ispeed = sb.sg_ospeed = speed;
 170                 if (ioctl(FD, TIOCSETP, &sb) < 0) {
 171                         warn("TIOCSETP");
 172                 }
 173                 else
 174                         ++rc;
 175         }
 176 #endif /* HAVE TERMIOS */
 177         return (rc);
 178 }
 179
 180 void acu_hupcl ()
 181 {
 182 #if HAVE_TERMIOS
 183         struct termios term;
 184         tcgetattr (FD, &term);
 185         term.c_cflag |= HUPCL;
 186         tcsetattr (FD, TCSANOW, &term);
 187 #elif defined(TIOCHPCL)
 188         ioctl(FD, TIOCHPCL, 0);
 189 #endif
 190 }
 191
 192 /* end of acucommon.c */