source/printing/print_svid.c

   1 /*
   2  * Copyright (C) 1997-1998 by Norm Jacobs, Colorado Springs, Colorado, USA
   3  * Copyright (C) 1997-1998 by Sun Microsystem, Inc.
   4  * All Rights Reserved
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21 /*
  22  * This module implements support for gathering and comparing available
  23  * printer information on a SVID or XPG4 compliant system.  It does this
  24  * through the use of the SVID/XPG4 command "lpstat(1)".
  25  *
  26  * The expectations is that execution of the command "lpstat -v" will
  27  * generate responses in the form of:
  28  *
  29  *      device for serial: /dev/term/b
  30  *      system for fax: server
  31  *      system for color: server (as printer chroma)
  32  */
  33
  34
  35 #include "includes.h"
  36
  37 #ifdef SYSV
  38
  39 typedef struct printer {
  40         char *name;
  41         struct printer *next;
  42 } printer_t;
  43 static printer_t *printers = NULL;
  44
  45 static void populate_printers(void)
  46 {
  47         char **lines;
  48         int i;
  49
  50         lines = file_lines_pload("/usr/bin/lpstat -v", NULL);
  51         if (!lines) return;
  52
  53         for (i=0;lines[i];i++) {
  54                 printer_t *ptmp;
  55                 char *name, *tmp;
  56                 char *buf = lines[i];
  57
  58                 /* eat "system/device for " */
  59                 if (((tmp = strchr_m(buf, ' ')) == NULL) ||
  60                     ((tmp = strchr_m(++tmp, ' ')) == NULL))
  61                         continue;
  62
  63                 /*
  64                  * In case we're only at the "for ".
  65                  */
  66
  67                 if(!strncmp("for ",++tmp,4)) {
  68                         tmp=strchr_m(tmp, ' ');
  69                         tmp++;
  70                 }
  71
  72                 /* Eat whitespace. */
  73
  74                 while(*tmp == ' ')
  75                         ++tmp;
  76
  77                 /*
  78                  * On HPUX there is an extra line that can be ignored.
  79                  * d.thibadeau 2001/08/09
  80                  */
  81                 if(!strncmp("remote to",tmp,9))
  82                         continue;
  83
  84                 name = tmp;
  85
  86                 /* truncate the ": ..." */
  87                 if ((tmp = strchr_m(name, ':')) != NULL)
  88                         *tmp = '\0';
  89
  90                 /* add it to the cache */
  91                 if ((ptmp = malloc(sizeof (*ptmp))) != NULL) {
  92                         ZERO_STRUCTP(ptmp);
  93                         if((ptmp->name = strdup(name)) == NULL)
  94                                 DEBUG(0,("populate_printers: malloc fail in strdup !\n"));
  95                         ptmp->next = printers;
  96                         printers = ptmp;
  97                 } else {
  98                         DEBUG(0,("populate_printers: malloc fail for ptmp\n"));
  99                 }
 100         }
 101
 102         file_lines_free(lines);
 103 }
 104
 105
 106 /*
 107  * provide the equivalent of pcap_printer_fn() for SVID/XPG4 conforming
 108  * systems.  It was unclear why pcap_printer_fn() was tossing names longer
 109  * than 8 characters.  I suspect that its a protocol limit, but amazingly
 110  * names longer than 8 characters appear to work with my test
 111  * clients (Win95/NT).
 112  */
 113 void sysv_printer_fn(void (*fn)(char *, char *))
 114 {
 115         printer_t *tmp;
 116
 117         if (printers == NULL)
 118                 populate_printers();
 119         for (tmp = printers; tmp != NULL; tmp = tmp->next)
 120                 (fn)(tmp->name, "");
 121 }
 122
 123
 124 /*
 125  * provide the equivalent of pcap_printername_ok() for SVID/XPG4 conforming
 126  * systems.
 127  */
 128 int sysv_printername_ok(const char *name)
 129 {
 130         printer_t *tmp;
 131
 132         if (printers == NULL)
 133                 populate_printers();
 134         for (tmp = printers; tmp != NULL; tmp = tmp->next)
 135                 if (strcmp(tmp->name, name) == 0)
 136                         return (True);
 137         return (False);
 138 }
 139
 140 #else
 141 /* this keeps fussy compilers happy */
 142  void print_svid_dummy(void);
 143  void print_svid_dummy(void) {}
 144 #endif