1 files changed, 263 insertions, 0 deletions
diff --git a/source3/printing/pcap.c b/source3/printing/pcap.c
new file mode 100644
index 0000000000..30cb254a29
--- /dev/null
+++ b/source3/printing/pcap.c
@@ -0,0 +1,263 @@
+/* 
+   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.
+ *
+ *  Modified to call SVID/XPG4 support if printcap name is set to "lpstat"
+ *  in smb.conf under Solaris.
+ *
+ *  Modified to call CUPS support if printcap name is set to "cups"
+ *  in smb.conf.
+ *
+ *  Modified to call iPrint support if printcap name is set to "iprint"
+ *  in smb.conf.
+ */
+
+#include "includes.h"
+
+
+typedef struct pcap_cache {
+	char *name;
+	char *comment;
+	struct pcap_cache *next;
+} pcap_cache_t;
+
+static pcap_cache_t *pcap_cache = NULL;
+
+bool pcap_cache_add(const char *name, const char *comment)
+{
+	pcap_cache_t *p;
+
+	if (name == NULL || ((p = SMB_MALLOC_P(pcap_cache_t)) == NULL))
+		return False;
+
+	p->name = SMB_STRDUP(name);
+	p->comment = (comment && *comment) ? SMB_STRDUP(comment) : NULL;
+
+	p->next = pcap_cache;
+	pcap_cache = p;
+
+	return True;
+}
+
+static void pcap_cache_destroy(pcap_cache_t *cache)
+{
+	pcap_cache_t *p, *next;
+
+	for (p = cache; p != NULL; p = next) {
+		next = p->next;
+
+		SAFE_FREE(p->name);
+		SAFE_FREE(p->comment);
+		SAFE_FREE(p);
+	}
+}
+
+bool pcap_cache_loaded(void)
+{
+	return (pcap_cache != NULL);
+}
+
+void pcap_cache_reload(void)
+{
+	const char *pcap_name = lp_printcapname();
+	bool pcap_reloaded = False;
+	pcap_cache_t *tmp_cache = NULL;
+	XFILE *pcap_file;
+	char *pcap_line;
+
+	DEBUG(3, ("reloading printcap cache\n"));
+
+	/* only go looking if no printcap name supplied */
+	if (pcap_name == NULL || *pcap_name == 0) {
+		DEBUG(0, ("No printcap file name configured!\n"));
+		return;
+	}
+
+	tmp_cache = pcap_cache;
+	pcap_cache = NULL;
+
+#ifdef HAVE_CUPS
+	if (strequal(pcap_name, "cups")) {
+		pcap_reloaded = cups_cache_reload();
+		goto done;
+	}
+#endif
+
+#ifdef HAVE_IPRINT
+	if (strequal(pcap_name, "iprint")) {
+		pcap_reloaded = iprint_cache_reload();
+		goto done;
+	}
+#endif
+
+#if defined(SYSV) || defined(HPUX)
+	if (strequal(pcap_name, "lpstat")) {
+		pcap_reloaded = sysv_cache_reload();
+		goto done;
+	}
+#endif
+
+#ifdef AIX
+	if (strstr_m(pcap_name, "/qconfig") != NULL) {
+		pcap_reloaded = aix_cache_reload();
+		goto done;
+	}
+#endif
+
+	/* handle standard printcap - moved from pcap_printer_fn() */
+
+	if ((pcap_file = x_fopen(pcap_name, O_RDONLY, 0)) == NULL) {
+		DEBUG(0, ("Unable to open printcap file %s for read!\n", pcap_name));
+		goto done;
+	}
+
+	for (; (pcap_line = fgets_slash(NULL, 1024, pcap_file)) != NULL; safe_free(pcap_line)) {
+		char name[MAXPRINTERLEN+1];
+		char comment[62];
+		char *p, *q;
+
+		if (*pcap_line == '#' || *pcap_line == 0)
+			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 (*name = *comment = 0, p = pcap_line; p != NULL; p = q) {
+			bool has_punctuation;
+
+			if ((q = strchr_m(p, '|')) != NULL)
+				*q++ = 0;
+
+			has_punctuation = (strchr_m(p, ' ') ||
+			                   strchr_m(p, '\t') ||
+			                   strchr_m(p, '(') ||
+			                   strchr_m(p, ')'));
+
+			if (strlen(p) > strlen(comment) && has_punctuation) {
+				strlcpy(comment, p, sizeof(comment));
+				continue;
+			}
+
+			if (strlen(p) <= MAXPRINTERLEN &&
+			    strlen(p) > strlen(name) && !has_punctuation) {
+				if (!*comment) {
+					strlcpy(comment, name, sizeof(comment));
+				}
+				strlcpy(name, p, sizeof(name));
+				continue;
+			}
+
+			if (!strchr_m(comment, ' ') &&
+			    strlen(p) > strlen(comment)) {
+				strlcpy(comment, p, sizeof(comment));
+				continue;
+			}
+		}
+
+		comment[60] = 0;
+		name[MAXPRINTERLEN] = 0;
+
+		if (*name && !pcap_cache_add(name, comment)) {
+			x_fclose(pcap_file);
+			goto done;
+		}
+	}
+
+	x_fclose(pcap_file);
+	pcap_reloaded = True;
+
+done:
+	DEBUG(3, ("reload status: %s\n", (pcap_reloaded) ? "ok" : "error"));
+
+	if (pcap_reloaded)
+		pcap_cache_destroy(tmp_cache);
+	else {
+		pcap_cache_destroy(pcap_cache);
+		pcap_cache = tmp_cache;
+	}
+
+	return;
+}
+
+
+bool pcap_printername_ok(const char *printername)
+{
+	pcap_cache_t *p;
+
+	for (p = pcap_cache; p != NULL; p = p->next)
+		if (strequal(p->name, printername))
+			return True;
+
+	return False;
+}
+
+/***************************************************************************
+run a function on each printer name in the printcap file. The function is 
+passed the primary name and the comment (if possible). Note the fn() takes
+strings in DOS codepage. This means the xxx_printer_fn() calls must be fixed
+to return DOS codepage. FIXME !! JRA.
+
+XXX: I'm not sure if this comment still applies.. Anyone?  -Rob
+***************************************************************************/
+void pcap_printer_fn(void (*fn)(char *, char *))
+{
+	pcap_cache_t *p;
+
+	for (p = pcap_cache; p != NULL; p = p->next)
+		fn(p->name, p->comment);
+
+	return;
+}