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287 lines
7.1 KiB
C
287 lines
7.1 KiB
C
/*
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Unix SMB/CIFS implementation.
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printcap parsing
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Copyright (C) Karl Auer 1993-1998
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Re-working by Martin Kiff, 1994
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Re-written again by Andrew Tridgell
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Modified for SVID support by Norm Jacobs, 1997
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Modified for CUPS support by Michael Sweet, 1999
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* This module contains code to parse and cache printcap data, possibly
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* in concert with the CUPS/SYSV/AIX-specific code found elsewhere.
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*
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* The way this module looks at the printcap file is very simplistic.
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* Only the local printcap file is inspected (no searching of NIS
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* databases etc).
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*
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* There are assumed to be one or more printer names per record, held
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* as a set of sub-fields separated by vertical bar symbols ('|') in the
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* first field of the record. The field separator is assumed to be a colon
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* ':' and the record separator a newline.
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*
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* Lines ending with a backspace '\' are assumed to flag that the following
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* line is a continuation line so that a set of lines can be read as one
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* printcap entry.
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*
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* A line stating with a hash '#' is assumed to be a comment and is ignored
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* Comments are discarded before the record is strung together from the
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* set of continuation lines.
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*
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* Opening a pipe for "lpc status" and reading that would probably
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* be pretty effective. Code to do this already exists in the freely
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* distributable PCNFS server code.
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*
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* Modified to call SVID/XPG4 support if printcap name is set to "lpstat"
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* in smb.conf under Solaris.
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*
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* Modified to call CUPS support if printcap name is set to "cups"
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* in smb.conf.
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*
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* Modified to call iPrint support if printcap name is set to "iprint"
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* in smb.conf.
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*/
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#include "includes.h"
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struct pcap_cache {
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char *name;
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char *comment;
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struct pcap_cache *next;
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};
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/* The systemwide printcap cache. */
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static struct pcap_cache *pcap_cache = NULL;
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bool pcap_cache_add_specific(struct pcap_cache **ppcache, const char *name, const char *comment)
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{
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struct pcap_cache *p;
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if (name == NULL || ((p = SMB_MALLOC_P(struct pcap_cache)) == NULL))
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return false;
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p->name = SMB_STRDUP(name);
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p->comment = (comment && *comment) ? SMB_STRDUP(comment) : NULL;
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DEBUG(11,("pcap_cache_add_specific: Adding name %s info %s\n",
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p->name, p->comment ? p->comment : ""));
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p->next = *ppcache;
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*ppcache = p;
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return true;
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}
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void pcap_cache_destroy_specific(struct pcap_cache **pp_cache)
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{
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struct pcap_cache *p, *next;
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for (p = *pp_cache; p != NULL; p = next) {
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next = p->next;
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SAFE_FREE(p->name);
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SAFE_FREE(p->comment);
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SAFE_FREE(p);
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}
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*pp_cache = NULL;
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}
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bool pcap_cache_add(const char *name, const char *comment)
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{
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return pcap_cache_add_specific(&pcap_cache, name, comment);
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}
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bool pcap_cache_loaded(void)
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{
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return (pcap_cache != NULL);
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}
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void pcap_cache_replace(const struct pcap_cache *pcache)
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{
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const struct pcap_cache *p;
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pcap_cache_destroy_specific(&pcap_cache);
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for (p = pcache; p; p = p->next) {
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pcap_cache_add(p->name, p->comment);
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}
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}
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void pcap_cache_reload(void)
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{
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const char *pcap_name = lp_printcapname();
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bool pcap_reloaded = False;
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struct pcap_cache *tmp_cache = NULL;
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XFILE *pcap_file;
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char *pcap_line;
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DEBUG(3, ("reloading printcap cache\n"));
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/* only go looking if no printcap name supplied */
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if (pcap_name == NULL || *pcap_name == 0) {
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DEBUG(0, ("No printcap file name configured!\n"));
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return;
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}
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tmp_cache = pcap_cache;
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pcap_cache = NULL;
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#ifdef HAVE_CUPS
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if (strequal(pcap_name, "cups")) {
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pcap_reloaded = cups_cache_reload();
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goto done;
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}
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#endif
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#ifdef HAVE_IPRINT
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if (strequal(pcap_name, "iprint")) {
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pcap_reloaded = iprint_cache_reload();
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goto done;
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}
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#endif
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#if defined(SYSV) || defined(HPUX)
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if (strequal(pcap_name, "lpstat")) {
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pcap_reloaded = sysv_cache_reload();
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goto done;
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}
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#endif
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#ifdef AIX
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if (strstr_m(pcap_name, "/qconfig") != NULL) {
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pcap_reloaded = aix_cache_reload();
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goto done;
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}
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#endif
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/* handle standard printcap - moved from pcap_printer_fn() */
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if ((pcap_file = x_fopen(pcap_name, O_RDONLY, 0)) == NULL) {
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DEBUG(0, ("Unable to open printcap file %s for read!\n", pcap_name));
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goto done;
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}
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for (; (pcap_line = fgets_slash(NULL, 1024, pcap_file)) != NULL; safe_free(pcap_line)) {
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char name[MAXPRINTERLEN+1];
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char comment[62];
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char *p, *q;
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if (*pcap_line == '#' || *pcap_line == 0)
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continue;
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/* now we have a real printer line - cut at the first : */
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if ((p = strchr_m(pcap_line, ':')) != NULL)
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*p = 0;
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/*
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* now find the most likely printer name and comment
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* this is pure guesswork, but it's better than nothing
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*/
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for (*name = *comment = 0, p = pcap_line; p != NULL; p = q) {
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bool has_punctuation;
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if ((q = strchr_m(p, '|')) != NULL)
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*q++ = 0;
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has_punctuation = (strchr_m(p, ' ') ||
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strchr_m(p, '\t') ||
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strchr_m(p, '(') ||
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strchr_m(p, ')'));
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if (strlen(p) > strlen(comment) && has_punctuation) {
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strlcpy(comment, p, sizeof(comment));
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continue;
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}
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if (strlen(p) <= MAXPRINTERLEN &&
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strlen(p) > strlen(name) && !has_punctuation) {
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if (!*comment) {
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strlcpy(comment, name, sizeof(comment));
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}
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strlcpy(name, p, sizeof(name));
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continue;
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}
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if (!strchr_m(comment, ' ') &&
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strlen(p) > strlen(comment)) {
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strlcpy(comment, p, sizeof(comment));
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continue;
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}
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}
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comment[60] = 0;
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name[MAXPRINTERLEN] = 0;
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if (*name && !pcap_cache_add(name, comment)) {
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x_fclose(pcap_file);
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goto done;
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}
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}
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x_fclose(pcap_file);
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pcap_reloaded = True;
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done:
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DEBUG(3, ("reload status: %s\n", (pcap_reloaded) ? "ok" : "error"));
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if (pcap_reloaded)
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pcap_cache_destroy_specific(&tmp_cache);
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else {
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pcap_cache_destroy_specific(&pcap_cache);
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pcap_cache = tmp_cache;
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}
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return;
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}
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bool pcap_printername_ok(const char *printername)
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{
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struct pcap_cache *p;
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for (p = pcap_cache; p != NULL; p = p->next)
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if (strequal(p->name, printername))
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return True;
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return False;
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}
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/***************************************************************************
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run a function on each printer name in the printcap file.
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***************************************************************************/
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void pcap_printer_fn_specific(const struct pcap_cache *pc,
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void (*fn)(const char *, const char *, void *),
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void *pdata)
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{
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const struct pcap_cache *p;
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for (p = pc; p != NULL; p = p->next)
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fn(p->name, p->comment, pdata);
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return;
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}
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void pcap_printer_fn(void (*fn)(const char *, const char *, void *), void *pdata)
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{
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pcap_printer_fn_specific(pcap_cache, fn, pdata);
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}
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