summaryrefslogtreecommitdiff
path: root/source3/printing/pcap.c
blob: ff0a2b54772e47d25679f25e26a36d1caeafd893 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
/* 
   Unix SMB/Netbios implementation.
   Version 1.9.
   printcap parsing
   Copyright (C) Karl Auer 1993-1997

   Re-working by Martin Kiff, 1994
   
   Re-written again by Andrew Tridgell

   Modified for SVID support by Norm Jacobs, 1997
   
   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 2 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, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

/*
 *  Parse printcap file.
 *
 *  This module does exactly one thing - it looks into the printcap file
 *  and tells callers if a specified string appears as a printer name.
 *
 *  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.
 */

#include "includes.h"

#include "smb.h"

extern int DEBUGLEVEL;

#ifdef AIX
/*  ******************************************
     Extend for AIX system and qconfig file
       from 'boulard@univ-rennes1.fr
    ****************************************** */
static int strlocate(char *xpLine,char *xpS)
{
	int iS,iL,i,iRet;
	char *p;
	iS = strlen(xpS);
	iL = strlen(xpLine);

	iRet = 0;
	p = xpLine;
	while (iL >= iS)
	{
		if (strncmp(p,xpS,iS) == 0) {iRet =1;break;};
		p++;
		iL--;
	}
	/*DEBUG(3,(" strlocate %s in line '%s',ret=%d\n",xpS,xpLine,iRet));*/
	
	return(iRet);
}
	
	
/* ******************************************************************* */
/* *    Scan qconfig and search all virtual printer (device printer) * */
/* ******************************************************************* */
static void ScanQconfig_fn(char *psz,void (*fn)())
{
	int iLg,iEtat;
	FILE *pfile;
	char *line,*p;
	pstring name,comment;
	line  = NULL;
	*name = 0;
	*comment = 0;

	if ((pfile = fopen(psz, "r")) == NULL)
	{
	      DEBUG(0,( "Unable to open qconfig file %s for read!\n", psz));
	      return;
	}

	iEtat = 0;
	/* scan qconfig file for searching <printername>:	*/
	for (;(line = fgets_slash(NULL,sizeof(pstring),pfile)); free(line))
	{
		if (*line == '*' || *line == 0)
		continue;
		switch (iEtat)
		{
			case 0: /* locate an entry */
			 if (*line == '\t' || *line == ' ') continue;
			 if ((p=strchr(line,':')))
			 {
			 	*p = '\0';
				p = strtok(line,":");
				if (strcmp(p,"bsh")!=0)
				  {
				    strcpy(name,p);
				    iEtat = 1;
				    continue;
				  }
			 }
			 break;
			case 1: /* scanning device stanza */
			 if (*line == '*' || *line == 0) continue;
		  	 if (*line != '\t' && *line != ' ')
		  	 {
		  	   /* name is found without stanza device  */
		  	   /* probably a good printer ???		*/
		  	   fn(name,comment);
		  	   iEtat = 0;
		  	   continue;
		  	  }
		  	
		  	  if (strlocate(line,"backend"))
		  	  {
		  		/* it's a device, not a virtual printer*/
		  		iEtat = 0;
		  	  }
		  	  else if (strlocate(line,"device"))
		  	  {
		  		/* it's a good virtual printer */
		  		fn(name,comment);
		  		iEtat = 0;
		  		continue;
		  	  }
		  	  break;
		}
	}
	fclose(pfile);
}

/* Scan qconfig file and locate de printername */

static BOOL ScanQconfig(char *psz,char *pszPrintername)
{
	int iLg,iEtat;
	FILE *pfile;
	char *pName;
	char *line;

	pName = NULL;
	line  = NULL;
	if ((pszPrintername!= NULL) && ((iLg = strlen(pszPrintername)) > 0))
	 pName = malloc(iLg+10);
	if (pName == NULL)
	{
		DEBUG(0,(" Unable to allocate memory for printer %s\n",pszPrintername));
		return(False);
	}
	if ((pfile = fopen(psz, "r")) == NULL)
	{
	      DEBUG(0,( "Unable to open qconfig file %s for read!\n", psz));
	      free(pName);
	      return(False);
	}
	sprintf(pName,"%s:",pszPrintername);
	iLg = strlen(pName);
	/*DEBUG(3,( " Looking for entry %s\n",pName));*/
	iEtat = 0;
	/* scan qconfig file for searching <printername>:	*/
	for (;(line = fgets_slash(NULL,sizeof(pstring),pfile)); free(line))
	{
		if (*line == '*' || *line == 0)
		continue;
		switch (iEtat)
		{
			case 0: /* scanning entry */
			 if (strncmp(line,pName,iLg) == 0)
			 {
			 	iEtat = 1;
			 	continue;
			 }
			 break;
			case 1: /* scanning device stanza */
			 if (*line == '*' || *line == 0) continue;
		  	 if (*line != '\t' && *line != ' ')
		  	 {
		  	   /* name is found without stanza device  */
		  	   /* probably a good printer ???		*/
		  	   free (line);
		  	   free(pName);
		  	   fclose(pfile);
		  	   return(True);
		  	  }
		  	
		  	  if (strlocate(line,"backend"))
		  	  {
		  		/* it's a device, not a virtual printer*/
		  		iEtat = 0;
		  	  }
		  	  else if (strlocate(line,"device"))
		  	  {
		  		/* it's a good virtual printer */
		  		free (line);
		  		free(pName);
		  		fclose(pfile);
		  		return(True);
		  	  }
		  	  break;
		}
	}
	free (pName);
	fclose(pfile);
	return(False);
}

#endif
/***************************************************************************
Scan printcap file pszPrintcapname for a printer called pszPrintername. 
Return True if found, else False. Returns False on error, too, after logging 
the error at level 0. For generality, the printcap name may be passed - if
passed as NULL, the configuration will be queried for the name.
***************************************************************************/
BOOL pcap_printername_ok(char *pszPrintername, char *pszPrintcapname)
{
  char *line=NULL;
  char *psz;
  char *p,*q;
  FILE *pfile;

  if (pszPrintername == NULL || pszPrintername[0] == '\0')
    {
      DEBUG(0,( "Attempt to locate null printername! Internal error?\n"));
      return(False);
    }

  /* only go looking if no printcap name supplied */
  if ((psz = pszPrintcapname) == NULL || psz[0] == '\0')
    if (((psz = lp_printcapname()) == NULL) || (psz[0] == '\0'))
      {
	DEBUG(0,( "No printcap file name configured!\n"));
	return(False);
      }

#ifdef SYSV
    if (strequal(psz, "lpstat"))
       return (sysv_printername_ok(pszPrintername));
#endif

#ifdef AIX
  if (strlocate(psz,"/qconfig") != NULL)
     return(ScanQconfig(psz,pszPrintername));
#endif

  if ((pfile = fopen(psz, "r")) == NULL)
    {
      DEBUG(0,( "Unable to open printcap file %s for read!\n", psz));
      return(False);
    }

  for (;(line = fgets_slash(NULL,sizeof(pstring),pfile)); free(line))
    {
      if (*line == '#' || *line == 0)
	continue;

      /* now we have a real printer line - cut it off at the first : */      
      p = strchr(line,':');
      if (p) *p = 0;
      
      /* now just check if the name is in the list */
      /* NOTE: I avoid strtok as the fn calling this one may be using it */
      for (p=line; p; p=q)
	{
	  if ((q = strchr(p,'|'))) *q++ = 0;

	  if (strequal(p,pszPrintername))
	    {
	      /* normalise the case */
	      strcpy(pszPrintername,p);
	      free(line);
	      fclose(pfile);
	      return(True);	      
	    }
	  p = q;
	}
    }

  fclose(pfile);
  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)
***************************************************************************/
void pcap_printer_fn(void (*fn)())
{
  pstring name,comment;
  char *line;
  char *psz;
  char *p,*q;
  FILE *pfile;

  /* only go looking if no printcap name supplied */
  if (((psz = lp_printcapname()) == NULL) || (psz[0] == '\0'))
    {
      DEBUG(0,( "No printcap file name configured!\n"));
      return;
    }

#ifdef SYSV
    if (strequal(psz, "lpstat")) {
      sysv_printer_fn(fn);
      return;
    }
#endif

#ifdef AIX
  if (strlocate(psz,"/qconfig") != NULL)
  {
  	ScanQconfig_fn(psz,fn);
     return;
  }
#endif

  if ((pfile = fopen(psz, "r")) == NULL)
    {
      DEBUG(0,( "Unable to open printcap file %s for read!\n", psz));
      return;
    }

  for (;(line = fgets_slash(NULL,sizeof(pstring),pfile)); free(line))
    {
      if (*line == '#' || *line == 0)
	continue;

      /* now we have a real printer line - cut it off at the first : */      
      p = strchr(line,':');
      if (p) *p = 0;
      
      /* now find the most likely printer name and comment 
       this is pure guesswork, but it's better than nothing */
      *name = 0;
      *comment = 0;
      for (p=line; p; p=q)
	{
	  BOOL has_punctuation;
	  if ((q = strchr(p,'|'))) *q++ = 0;

	  has_punctuation = (strchr(p,' ') || strchr(p,'(') || strchr(p,')'));

	  if (strlen(p)>strlen(comment) && has_punctuation)
	    {
	      StrnCpy(comment,p,sizeof(comment)-1);
	      continue;
	    }

	  if (strlen(p) <= 8 && strlen(p)>strlen(name) && !has_punctuation)
	    {
	      if (!*comment) pstrcpy(comment,name);
	      pstrcpy(name,p);
	      continue;
	    }

	  if (!strchr(comment,' ') && 
	      strlen(p) > strlen(comment))
	    {
	      StrnCpy(comment,p,sizeof(comment)-1);
	      continue;
	    }
	}

      comment[60] = 0;
      name[8] = 0;

      if (*name)
	fn(name,comment);
    }
  fclose(pfile);
}