File: statbuf.c

package info (click to toggle)
cups 1.4.4-7+squeeze10
  • links: PTS, VCS
  • area: main
  • in suites: squeeze-lts
  • size: 25,548 kB
  • ctags: 9,583
  • sloc: ansic: 138,214; sh: 37,926; cpp: 25,469; makefile: 3,285; perl: 190; python: 127; php: 28
file content (331 lines) | stat: -rw-r--r-- 6,742 bytes parent folder | download | duplicates (2)
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
/*
 * "$Id: statbuf.c 8459 2009-03-20 16:45:12Z mike $"
 *
 *   Status buffer routines for the Common UNIX Printing System (CUPS)
 *   scheduler.
 *
 *   Copyright 2007-2009 by Apple Inc.
 *   Copyright 1997-2006 by Easy Software Products, all rights reserved.
 *
 *   These coded instructions, statements, and computer programs are the
 *   property of Apple Inc. and are protected by Federal copyright
 *   law.  Distribution and use rights are outlined in the file "LICENSE.txt"
 *   which should have been included with this file.  If this file is
 *   file is missing or damaged, see the license at "http://www.cups.org/".
 *
 * Contents:
 *
 *   cupsdStatBufDelete() - Destroy a status buffer.
 *   cupsdStatBufNew()    - Create a new status buffer.
 *   cupsdStatBufUpdate() - Update the status buffer.
 */

/*
 * Include necessary headers...
 */

#include "cupsd.h"
#include <stdarg.h>


/*
 * 'cupsdStatBufDelete()' - Destroy a status buffer.
 */

void
cupsdStatBufDelete(cupsd_statbuf_t *sb)	/* I - Status buffer */
{
 /*
  * Range check input...
  */

  if (!sb)
    return;

 /*
  * Close the status pipe and free memory used...
  */

  close(sb->fd);

  free(sb);
}


/*
 * 'cupsdStatBufNew()' - Create a new status buffer.
 */

cupsd_statbuf_t	*			/* O - New status buffer */
cupsdStatBufNew(int        fd,		/* I - File descriptor of pipe */
                const char *prefix,	/* I - Printf-style prefix string */
		...)			/* I - Additional args as needed */
{
  cupsd_statbuf_t	*sb;		/* New status buffer */
  va_list		ap;		/* Argument list */


 /*
  * Range check input...
  */

  if (fd < 0)
    return (NULL);

 /*
  * Allocate the status buffer...
  */

  if ((sb = calloc(1, sizeof(cupsd_statbuf_t))) != NULL)
  {
   /*
    * Assign the file descriptor...
    */

    sb->fd = fd;

   /*
    * Format the prefix string, if any.  This is usually "[Job 123]"
    * or "[Sub 123]", and so forth.
    */

    if (prefix)
    {
     /*
      * Printf-style prefix string...
      */

      va_start(ap, prefix);
      vsnprintf(sb->prefix, sizeof(sb->prefix), prefix, ap);
      va_end(ap);
    }
    else
    {
     /*
      * No prefix string...
      */

      sb->prefix[0] = '\0';
    }
  }

  return (sb);
}


/*
 * 'cupsdStatBufUpdate()' - Update the status buffer.
 */

char *					/* O - Line from buffer, "", or NULL */
cupsdStatBufUpdate(
    cupsd_statbuf_t *sb,		/* I - Status buffer */
    int             *loglevel,		/* O - Log level */ 
    char            *line,		/* I - Line buffer */
    int             linelen)		/* I - Size of line buffer */
{
  int		bytes;			/* Number of bytes read */
  char		*lineptr,		/* Pointer to end of line in buffer */
		*message;		/* Pointer to message text */


 /*
  * Check if the buffer already contains a full line...
  */

  if ((lineptr = strchr(sb->buffer, '\n')) == NULL)
  {
   /*
    * No, read more data...
    */

    if ((bytes = read(sb->fd, sb->buffer + sb->bufused,
                      CUPSD_SB_BUFFER_SIZE - sb->bufused - 1)) > 0)
    {
      sb->bufused += bytes;
      sb->buffer[sb->bufused] = '\0';

     /*
      * Guard against a line longer than the max buffer size...
      */

      if ((lineptr = strchr(sb->buffer, '\n')) == NULL &&
          sb->bufused == (CUPSD_SB_BUFFER_SIZE - 1))
	lineptr = sb->buffer + sb->bufused;
    }
    else if (bytes < 0 && errno == EINTR)
    {
     /*
      * Return an empty line if we are interrupted...
      */

      *loglevel = CUPSD_LOG_NONE;
      line[0]   = '\0';

      return (line);
    }
    else
    {
     /*
      * End-of-file, so use the whole buffer...
      */

      lineptr  = sb->buffer + sb->bufused;
      *lineptr = '\0';
    }

   /*
    * Final check for end-of-file...
    */

    if (sb->bufused == 0 && bytes == 0)
      lineptr = NULL;
  }

  if (!lineptr)
  {
   /*
    * End of file...
    */

    *loglevel = CUPSD_LOG_NONE;
    line[0]   = '\0';

    return (NULL);
  }

 /*
  * Terminate the line and process it...
  */

  *lineptr++ = '\0';

 /*
  * Figure out the logging level...
  */

  if (!strncmp(sb->buffer, "EMERG:", 6))
  {
    *loglevel = CUPSD_LOG_EMERG;
    message   = sb->buffer + 6;
  }
  else if (!strncmp(sb->buffer, "ALERT:", 6))
  {
    *loglevel = CUPSD_LOG_ALERT;
    message   = sb->buffer + 6;
  }
  else if (!strncmp(sb->buffer, "CRIT:", 5))
  {
    *loglevel = CUPSD_LOG_CRIT;
    message   = sb->buffer + 5;
  }
  else if (!strncmp(sb->buffer, "ERROR:", 6))
  {
    *loglevel = CUPSD_LOG_ERROR;
    message   = sb->buffer + 6;
  }
  else if (!strncmp(sb->buffer, "WARNING:", 8))
  {
    *loglevel = CUPSD_LOG_WARN;
    message   = sb->buffer + 8;
  }
  else if (!strncmp(sb->buffer, "NOTICE:", 7))
  {
    *loglevel = CUPSD_LOG_NOTICE;
    message   = sb->buffer + 7;
  }
  else if (!strncmp(sb->buffer, "INFO:", 5))
  {
    *loglevel = CUPSD_LOG_INFO;
    message   = sb->buffer + 5;
  }
  else if (!strncmp(sb->buffer, "DEBUG:", 6))
  {
    *loglevel = CUPSD_LOG_DEBUG;
    message   = sb->buffer + 6;
  }
  else if (!strncmp(sb->buffer, "DEBUG2:", 7))
  {
    *loglevel = CUPSD_LOG_DEBUG2;
    message   = sb->buffer + 7;
  }
  else if (!strncmp(sb->buffer, "PAGE:", 5))
  {
    *loglevel = CUPSD_LOG_PAGE;
    message   = sb->buffer + 5;
  }
  else if (!strncmp(sb->buffer, "STATE:", 6))
  {
    *loglevel = CUPSD_LOG_STATE;
    message   = sb->buffer + 6;
  }
  else if (!strncmp(sb->buffer, "ATTR:", 5))
  {
    *loglevel = CUPSD_LOG_ATTR;
    message   = sb->buffer + 5;
  }
  else if (!strncmp(sb->buffer, "PPD:", 4))
  {
    *loglevel = CUPSD_LOG_PPD;
    message   = sb->buffer + 4;
  }
  else
  {
    *loglevel = CUPSD_LOG_DEBUG;
    message   = sb->buffer;
  }

 /*
  * Skip leading whitespace in the message...
  */

  while (isspace(*message & 255))
    message ++;

 /*
  * Send it to the log file as needed...
  */

  if (sb->prefix[0])
  {
    if (*loglevel > CUPSD_LOG_NONE &&
	(*loglevel != CUPSD_LOG_INFO || LogLevel >= CUPSD_LOG_DEBUG))
    {
     /*
      * General status message; send it to the error_log file...
      */

      if (message[0] == '[')
	cupsdLogMessage(*loglevel, "%s", message);
      else
	cupsdLogMessage(*loglevel, "%s %s", sb->prefix, message);
    }
    else if (*loglevel < CUPSD_LOG_NONE && LogLevel >= CUPSD_LOG_DEBUG)
      cupsdLogMessage(CUPSD_LOG_DEBUG2, "%s %s", sb->prefix, sb->buffer);
  }

 /*
  * Copy the message to the line buffer...
  */

  strlcpy(line, message, linelen);

 /*
  * Copy over the buffer data we've used up...
  */

  if (lineptr < sb->buffer + sb->bufused)
    _cups_strcpy(sb->buffer, lineptr);

  sb->bufused -= lineptr - sb->buffer;

  if (sb->bufused < 0)
    sb->bufused = 0;

  return (line);
}


/*
 * End of "$Id: statbuf.c 8459 2009-03-20 16:45:12Z mike $".
 */