1 /**************************************************************************** 2 * Copyright (c) 1998 Free Software Foundation, Inc. * 3 * * 4 * Permission is hereby granted, free of charge, to any person obtaining a * 5 * copy of this software and associated documentation files (the * 6 * "Software"), to deal in the Software without restriction, including * 7 * without limitation the rights to use, copy, modify, merge, publish, * 8 * distribute, distribute with modifications, sublicense, and/or sell * 9 * copies of the Software, and to permit persons to whom the Software is * 10 * furnished to do so, subject to the following conditions: * 11 * * 12 * The above copyright notice and this permission notice shall be included * 13 * in all copies or substantial portions of the Software. * 14 * * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 22 * * 23 * Except as contained in this notice, the name(s) of the above copyright * 24 * holders shall not be used in advertising or otherwise to promote the * 25 * sale, use or other dealings in this Software without prior written * 26 * authorization. * 27 ****************************************************************************/ 28 29 /**************************************************************************** 30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 31 * and: Eric S. Raymond <esr@snark.thyrsus.com> * 32 ****************************************************************************/ 33 34 35 #include <curses.priv.h> 36 37 #include <term.h> 38 39 MODULE_ID("$Id: lib_print.c,v 1.11 1999/02/27 19:59:05 tom Exp $") 40 41 int mcprint(char *data, int len) 42 /* ship binary character data to the printer via mc4/mc5/mc5p */ 43 { 44 char *mybuf, *switchon; 45 size_t onsize, offsize, res; 46 47 errno = 0; 48 if (!cur_term || (!prtr_non && (!prtr_on || !prtr_off))) 49 { 50 errno = ENODEV; 51 return(ERR); 52 } 53 54 if (prtr_non) 55 { 56 switchon = tparm(prtr_non, len); 57 onsize = strlen(switchon); 58 offsize = 0; 59 } 60 else 61 { 62 switchon = prtr_on; 63 onsize = strlen(prtr_on); 64 offsize = strlen(prtr_off); 65 } 66 67 if ((mybuf = typeMalloc(char, onsize + len + offsize + 1)) == (char *)0) 68 { 69 errno = ENOMEM; 70 return(ERR); 71 } 72 73 (void) strcpy(mybuf, switchon); 74 memcpy(mybuf + onsize, data, len); 75 if (offsize) 76 (void) strcpy(mybuf + onsize + len, prtr_off); 77 78 /* 79 * We're relying on the atomicity of UNIX writes here. The 80 * danger is that output from a refresh() might get interspersed 81 * with the printer data after the write call returns but before the 82 * data has actually been shipped to the terminal. If the write(2) 83 * operation is truly atomic we're protected from this. 84 */ 85 res = write(cur_term->Filedes, mybuf, onsize + len + offsize); 86 87 /* 88 * By giving up our scheduler slot here we increase the odds that the 89 * kernel will ship the contiguous clist items from the last write 90 * immediately. 91 */ 92 (void) sleep(0); 93 94 free(mybuf); 95 return(res); 96 } 97