usr.bin/doscmd/int17.c

   1 /*
   2  * Copyright (c) 1992, 1993, 1996
   3  *      Berkeley Software Design, Inc.  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 Berkeley Software
  16  *      Design, Inc.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  *
  30  *      BSDI int17.c,v 2.2 1996/04/08 19:32:48 bostic Exp
  31  *
  32  * $FreeBSD: src/usr.bin/doscmd/int17.c,v 1.4.2.3 2002/04/25 11:04:51 tg Exp $
  33  * $DragonFly: src/usr.bin/doscmd/int17.c,v 1.2 2003/06/17 04:29:26 dillon Exp $
  34  */
  35
  36 #include <sys/types.h>
  37 #include <sys/uio.h>
  38 #include <paths.h>
  39 #include <signal.h>
  40 #include <unistd.h>
  41
  42 #include "doscmd.h"
  43
  44 static int      lpt_fd[4] = { -1, -1, -1, -1, };
  45 static FILE     *lpt_file[4] = { 0, 0, 0, 0};
  46 static int      direct[4] = { 0, 0, 0, 0};
  47 static char     *queue[4] = { 0, 0, 0, 0};
  48 static int      timeout[4] = { 30, 30, 30, 30 };
  49 static int      last_poll[4] = { 0, 0, 0, 0};
  50 static int      last_count[4] = { 0, 0, 0, 0};
  51 static int      current_count[4] = { 0, 0, 0, 0};
  52
  53 static void open_printer(int printer);
  54
  55 void
  56 int17(regcontext_t *REGS)
  57 {
  58     int fd;
  59     u_char c;
  60
  61     switch (R_AH) {
  62
  63     case 0x00:
  64         reset_poll();
  65
  66         fd = lpt_fd[R_DX];
  67         if (fd == -1) {
  68             open_printer(R_DX);
  69             fd = lpt_fd[R_DX];
  70         }
  71         if (fd >= 0) {
  72             c = R_AL;
  73             write(fd, &c, 1);
  74         }
  75         R_AH = 0x90;            /* printed selected */
  76         current_count[R_DX]++;
  77         break;
  78
  79     case 0x01:
  80     case 0x02:
  81         R_AH = 0x90;
  82         break;
  83
  84     default:
  85         unknown_int2(0x17, R_AH, REGS);
  86         break;
  87     }
  88 }
  89
  90 void
  91 lpt_poll(void)
  92 {
  93     int i;
  94     int current;
  95
  96     current = time(0);
  97
  98     for(i=0; i < 4; i++) {
  99         if (lpt_fd[i] < 0)
 100             continue;
 101
 102         if (current - last_poll[i] < timeout[i])
 103             continue;
 104
 105         last_poll[i] = current;
 106
 107         if (last_count[i] == current_count[i]) {
 108             if (direct[i]) {
 109                 debug(D_PRINTER, "Closing printer %d\n", i);
 110                 close(lpt_fd[i]);
 111             } else {
 112                 debug(D_PRINTER, "Closing spool printer %d\n", i);
 113                 pclose(lpt_file[i]);
 114             }
 115             lpt_fd[i] = -1;
 116             lpt_file[i] = 0;
 117         }
 118
 119         last_count[i] = current_count[i];
 120     }
 121 }
 122
 123
 124 static void
 125 open_printer(int printer)
 126 {
 127     char        printer_name[80];
 128     char        command[120];
 129     int         fd;
 130     FILE        *file;
 131     char        *p;
 132
 133     /*
 134      * if printer is direct then open output device.
 135      */
 136     if (direct[printer]) {
 137         if ((p = queue[printer]) != 0) {
 138             if ((fd = open(p, O_WRONLY|O_APPEND|O_CREAT, 0666)) < 0) {
 139                 perror(p);
 140                 return;
 141             }
 142         } else {
 143             sprintf(printer_name, "%slpt%d", _PATH_DEV, printer);
 144             debug(D_PRINTER, "Opening device %s\n", printer_name);
 145             if ((fd = open(printer_name, O_WRONLY)) < 0) {
 146                 perror(printer_name);
 147                 return;
 148             }
 149         }
 150         lpt_fd[printer] = fd;
 151         return;
 152     }
 153
 154     /*
 155      * If printer is a spooled device then open pipe to spooled device
 156      */
 157     if (queue[printer]) {
 158         strncpy(printer_name, queue[printer], sizeof(printer_name));
 159         printer_name[sizeof(printer_name) - 1] = '\0';
 160     } else
 161         strcpy(printer_name, "lp");
 162
 163     snprintf(command, sizeof(command), "lpr -P %s", printer_name);
 164     debug(D_PRINTER, "opening pipe to %s\n", printer_name);
 165
 166     if ((file = popen(command, "w")) == 0) {
 167         perror(command);
 168         return;
 169     }
 170     lpt_file[printer] = file;
 171     lpt_fd[printer] = fileno(file);
 172 }
 173
 174 void
 175 printer_direct(int printer)
 176 {
 177     direct[printer] = 1;
 178 }
 179
 180 void
 181 printer_spool(int printer, char *print_queue)
 182 {
 183     queue[printer] = print_queue ? strdup(print_queue) : 0;
 184 }
 185
 186 void
 187 printer_timeout(int printer, char *time_out)
 188 {
 189     if (atoi(time_out) <= 0) {
 190         fprintf(stderr, "Bad timeout value on lpt%d:\n", printer+1);
 191         quit(1);
 192     }
 193     timeout[printer] = atoi(time_out);
 194 }