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From: jv@mh.nl (Johan Vromans)
Newsgroups: comp.protocols.appletalk
Subject: Using lwpr as a filter
Message-ID: <1991Jun26.112932.4177@pronto.mh.nl>
Date: 26 Jun 91 11:29:32 GMT
Article-I.D.: pronto.1991Jun26.112932.4177
Sender: jv@pronto.mh.nl (Johan Vromans)
Reply-To: Johan Vromans <jv@mh.nl>
Organization: Multihouse Automation, the Netherlands
Lines: 101
X-Md4-Signature: d5382ecd86892068408fbd9630a92d2c

The following small patch to samples/lwpr.c makes it possible to use
lwpr as a filter (i.e. takes the file to print from standard input).
I cannot see a reason why this should not be possible.

CAP 6.0, Patchlevel 27.

*** samples/lwpr.c~	Thu Feb 28 13:44:08 1991
--- samples/lwpr.c	Wed Jun 26 13:22:28 1991
***************
*** 57,63 ****
  usage(pgm)
  char *pgm;
  {
!   fprintf(stderr,"%s [-d<debug args>] [-p printer] file [file]*\n",pgm);
    fprintf(stderr, "\tnote: uses PRINTER environment var if printer name\n");
    fprintf(stderr, "\tnot given (requires %s)\n",CAPPRINTERS);
    exit(1);
--- 57,63 ----
  usage(pgm)
  char *pgm;
  {
!   fprintf(stderr,"%s [-d<debug args>] [-p printer] [file|-] [file]*\n",pgm);
    fprintf(stderr, "\tnote: uses PRINTER environment var if printer name\n");
    fprintf(stderr, "\tnot given (requires %s)\n",CAPPRINTERS);
    exit(1);
***************
*** 118,124 ****
  
    for (; optind < argc; optind++ ) {
      s = argv[optind];
!     if (access(s, R_OK) == 0)
        sendfile(s);
      else
        perror(s);
--- 118,124 ----
  
    for (; optind < argc; optind++ ) {
      s = argv[optind];
!     if ((access(s, R_OK) == 0) || !strcmp (s, "-"))
        sendfile(s);
      else
        perror(s);
***************
*** 210,216 ****
    int eof, wcomp, paperr;
  
    printf("Sending %s\n",fname);
!   fd = open(fname,0);
    if (fd < 0) {
      perror(fname);
      return(FALSE);
--- 210,219 ----
    int eof, wcomp, paperr;
  
    printf("Sending %s\n",fname);
!   if ( strcmp (fname, "-") )
!     fd = open(fname,0);
!   else
!     fd = 0;			/* use stdin */
    if (fd < 0) {
      perror(fname);
      return(FALSE);
***************
*** 255,261 ****
        eof = handleread(cno);
      abSleep(4, TRUE);
    }
!   close(fd);
    return(((eof<0) || (paperr != noErr) || (wcomp != noErr))?TRUE:FALSE);
  }
  
--- 258,265 ----
        eof = handleread(cno);
      abSleep(4, TRUE);
    }
!   if ( fd > 0 )
!     close(fd);
    return(((eof<0) || (paperr != noErr) || (wcomp != noErr))?TRUE:FALSE);
  }
  
*** man/atprint.1~	Thu May 16 13:55:08 1991
--- man/atprint.1	Wed Jun 26 13:26:54 1991
***************
*** 37,42 ****
--- 37,44 ----
  .I lwpr
  runs in the foreground, establishing a connection to the LaserWriter and
  then sending the file.
+ .I filename
+ may be "\-" to specify standard input.
  .PP
  .I iwpr
  functions exactly the same way as 


	Johan
-- 
Johan Vromans				       jv@mh.nl via internet backbones
Multihouse Automatisering bv		       uucp: ..!{uunet,hp4nl}!mh.nl!jv
Doesburgweg 7, 2803 PL Gouda, The Netherlands  phone/fax: +31 1820 62911/62500
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