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/*
Unix SMB/CIFS implementation.
printcap parsing
Copyright (C) Karl Auer 1993-1998
Re-working by Martin Kiff, 1994
Re-written again by Andrew Tridgell
Modified for SVID support by Norm Jacobs, 1997
Modified for CUPS support by Michael Sweet, 1999
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* This module contains code to parse and cache printcap data, possibly
* in concert with the CUPS/SYSV/AIX-specific code found elsewhere.
*
* The way this module looks at the printcap file is very simplistic.
* Only the local printcap file is inspected (no searching of NIS
* databases etc).
*
* There are assumed to be one or more printer names per record, held
* as a set of sub-fields separated by vertical bar symbols ('|') in the
* first field of the record. The field separator is assumed to be a colon
* ':' and the record separator a newline.
*
* Lines ending with a backspace '\' are assumed to flag that the following
* line is a continuation line so that a set of lines can be read as one
* printcap entry.
*
* A line stating with a hash '#' is assumed to be a comment and is ignored
* Comments are discarded before the record is strung together from the
* set of continuation lines.
*
* Opening a pipe for "lpc status" and reading that would probably
* be pretty effective. Code to do this already exists in the freely
* distributable PCNFS server code.
*/
/* printcap parsing specific code moved here from printing/pcap.c */
#include "includes.h"
#include "system/filesys.h"
#include "printing/pcap.h"
/* handle standard printcap - moved from pcap_printer_fn() */
bool std_pcap_cache_reload(const char *pcap_name, struct pcap_cache **_pcache)
{
TALLOC_CTX *frame = talloc_stackframe();
FILE *pcap_file;
char *pcap_line;
struct pcap_cache *pcache = NULL;
bool print_warning = false;
if ((pcap_file = fopen(pcap_name, "r")) == NULL) {
DEBUG(0, ("Unable to open printcap file %s for read!\n", pcap_name));
talloc_free(frame);
return false;
}
while ((pcap_line = fgets_slash(frame, NULL, 1024,
pcap_file)) != NULL) {
char *name = NULL;
char *comment = NULL;
char *p, *q;
if (*pcap_line == '#' || *pcap_line == 0) {
TALLOC_FREE(pcap_line);
continue;
}
/* now we have a real printer line - cut at the first : */
if ((p = strchr_m(pcap_line, ':')) != NULL)
*p = 0;
/*
* now find the most likely printer name and comment
* this is pure guesswork, but it's better than nothing
*/
for (p = pcap_line; p != NULL; p = q) {
bool has_punctuation = false;
if ((q = strchr_m(p, '|')) != NULL)
*q++ = 0;
has_punctuation = (strchr_m(p, ' ') ||
strchr_m(p, '\t') ||
strchr_m(p, '"') ||
strchr_m(p, '\'') ||
strchr_m(p, ';') ||
strchr_m(p, ',') ||
strchr_m(p, '(') ||
strchr_m(p, ')'));
if (name == NULL && !has_punctuation) {
name = talloc_strdup(frame, p);
TALLOC_FREE(pcap_line);
continue;
}
if (has_punctuation) {
comment = talloc_strdup(frame, p);
TALLOC_FREE(pcap_line);
continue;
}
}
if (name != NULL) {
bool ok;
if (!print_warning && strlen(name) > MAXPRINTERLEN) {
print_warning = true;
}
ok = pcap_cache_add_specific(&pcache,
name,
comment,
NULL);
if (!ok) {
fclose(pcap_file);
pcap_cache_destroy_specific(&pcache);
talloc_free(frame);
return false;
}
}
TALLOC_FREE(name);
TALLOC_FREE(comment);
TALLOC_FREE(pcap_line);
}
if (print_warning) {
DBG_WARNING("WARNING: You have some printer names that are "
"longer than %u characters. These may not be "
"accessible to some older clients!\n",
(unsigned int)MAXPRINTERLEN);
}
fclose(pcap_file);
*_pcache = pcache;
talloc_free(frame);
return true;
}
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