summaryrefslogtreecommitdiff
path: root/libmailutils/stream/logstream.c
blob: 80a8e09bdc850f10fa2373f1f4c7ef8a0efe1272 (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
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
/* GNU Mailutils -- a suite of utilities for electronic mail
   Copyright (C) 2010, 2011 Free Software Foundation, Inc.

   This library is free software; you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as published by
   the Free Software Foundation; either version 3, or (at your option)
   any later version.

   This library 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 Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>. */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <errno.h>

#include <mailutils/types.h>
#include <mailutils/errno.h>
#include <mailutils/cctype.h>
#include <mailutils/cstr.h>
#include <mailutils/log.h>

#include <mailutils/nls.h>
#include <mailutils/stream.h>
#include <mailutils/debug.h>
#include <mailutils/sys/logstream.h>

char *_mu_severity_str[] = {
  N_("debug"),
  N_("info"),
  N_("notice"),
  N_("warning"),
  N_("error"),
  N_("crit"),
  N_("alert"),
  N_("emerg"),
};
int _mu_severity_num = MU_ARRAY_SIZE (_mu_severity_str);

int
mu_severity_from_string (const char *str, unsigned *pn)
{
  int i;

  for (i = 0; i < _mu_severity_num; i++)
    {
      if (mu_c_strcasecmp (_mu_severity_str[i], str) == 0)
	{
	  *pn = i;
	  return 0;
	}
    }
  return MU_ERR_NOENT;
}

int
mu_severity_to_string (unsigned n, const char **pstr)
{
  if (n >= _mu_severity_num)
    return MU_ERR_NOENT;
  *pstr = _mu_severity_str[n];
  return 0;
}

static int
_locus_set_file (struct mu_locus *loc, const char *file, size_t len)
{
  free (loc->mu_file);
  if (file)
    {
      loc->mu_file = malloc (len + 1);
      if (!loc->mu_file)
	return ENOMEM;
      memcpy (loc->mu_file, file, len);
      loc->mu_file[len] = 0;
    }
  else
    loc->mu_file = NULL;
  return 0;
}

#define _locus_set_line(loc, line) ((loc)->mu_line = line)
#define _locus_set_col(loc, col) ((loc)->mu_col = col)

static int
_log_write (struct _mu_stream *str, const char *buf, size_t size,
	    size_t *pnwrite)
{
  struct _mu_log_stream *sp = (struct _mu_log_stream *)str;
  unsigned severity = sp->severity;
  int logmode = sp->logmode;
  struct mu_locus loc = sp->locus;
  const char *fname = NULL;
  unsigned flen = 0;
  int save_locus = 0;
  int rc;
  int escape_error = 0;
  
#define NEXT do { buf++; size--; if (size == 0) return EINVAL; } while (0)
#define READNUM(n) do {				\
    unsigned __x = 0;				\
    if (*buf != '<')				\
      return EINVAL;				\
    NEXT;					\
    while (*buf != '>')				\
      {						\
        if (!mu_isdigit (*buf))			\
	  return EINVAL;			\
	__x = __x * 10 + (*buf - '0');		\
	NEXT;					\
      }						\
    NEXT;					\
    n = __x;					\
} while (0)

  /* Tell them we've consumed everything */
  *pnwrite = size;
  
  /* Process escapes */
  while (!escape_error && *buf == '\033')
    {
      int code;
      unsigned n;
      
      NEXT;
      code = *buf;
      NEXT;
      switch (code)
	{
	case 'S':
	  /* Save locus */
	  save_locus = 1;
	  break;

	case 's':
	  /* Severity code in decimal (single digit) */
	  if (*buf == '<')
	    READNUM (severity);
	  else if (mu_isdigit (*buf))
	    {
	      severity = *buf - '0';
	      NEXT;
	    }
	  else
	    return EINVAL;
	  break;
	  
	case 'O':
	  /* Flags on.  Followed by a bitmask of MU_LOGMODE_*, in decimal  */
	  READNUM (n);
	  logmode |= n;
	  break;
	  
	case 'X':
	  /* Flags off.  Followed by a bitmask of MU_LOGMODE_*, in decimal  */
	  READNUM (n);
	  logmode &= ~n;
	  break;
	  
	case 'l':
	  /* Input line (decimal) */
	  READNUM (n);
	  _locus_set_line (&loc, n);
	  break;

	case 'c':
	  /* Column in input line (decimal) */
	  READNUM (n);
	  _locus_set_col (&loc, n);
	  break;
	  
	case 'f':
	  /* File name. Format: <N>S */
	  READNUM (flen);
	  fname = buf;
	  buf += flen;
	  size -= flen;
	  break;

	default:
	  buf -= 2;
	  size += 2;
	  escape_error = 1;
	}
    }

  if (severity >= _mu_severity_num)
    severity = MU_LOG_EMERG;

  if (fname)
    {
      loc.mu_file = NULL;
      _locus_set_file (&loc, fname, flen);
    }
  
  if (save_locus)
    {
      _locus_set_file (&sp->locus, loc.mu_file, strlen (loc.mu_file));
      _locus_set_line (&sp->locus, loc.mu_line);
      _locus_set_col (&sp->locus, loc.mu_col);
    }
  
  if (severity < sp->threshold)
    {
      if (fname)
	free (loc.mu_file);
      return 0;
    }
  
  mu_stream_ioctl (sp->transport, MU_IOCTL_LOGSTREAM,
		   MU_IOCTL_LOGSTREAM_SET_SEVERITY, &severity);
  
  if (logmode & MU_LOGMODE_LOCUS)
    {
      if (loc.mu_file)
	{
	  mu_stream_write (sp->transport, loc.mu_file,
			   strlen (loc.mu_file), NULL);
	  mu_stream_write (sp->transport, ":", 1, NULL);
	  if (loc.mu_line)
	    mu_stream_printf (sp->transport, "%u", loc.mu_line);
	  mu_stream_write (sp->transport, ":", 1, NULL);
	  if (loc.mu_col)
	    mu_stream_printf (sp->transport, "%u:", loc.mu_col);
	  mu_stream_write (sp->transport, " ", 1, NULL);
	}
    }

  if (fname)
    free (loc.mu_file);
  
  if ((logmode & MU_LOGMODE_SEVERITY) &&
      !(sp->sevmask & MU_DEBUG_LEVEL_MASK(severity)))
    {
      char *s = gettext (_mu_severity_str[severity]);
      rc = mu_stream_write (sp->transport, s, strlen (s), NULL);
      if (rc)
	return rc;
      mu_stream_write (sp->transport, ": ", 2, NULL);
    }
  return mu_stream_write (sp->transport, buf, size, NULL);
}

static int
_log_flush (struct _mu_stream *str)
{
  struct _mu_log_stream *sp = (struct _mu_log_stream *)str;
  return mu_stream_flush (sp->transport);
}

static void
_log_done (struct _mu_stream *str)
{
  struct _mu_log_stream *sp = (struct _mu_log_stream *)str;
  mu_stream_destroy (&sp->transport);
}

static int
_log_close (struct _mu_stream *str)
{
  struct _mu_log_stream *sp = (struct _mu_log_stream *)str;
  return mu_stream_close (sp->transport);
}

static int
_log_setbuf_hook (mu_stream_t str, enum mu_buffer_type type, size_t size)
{
  if (type != mu_buffer_line)
    return EACCES;
  return 0;
}

static int
_log_ctl (struct _mu_stream *str, int code, int opcode, void *arg)
{
  struct _mu_log_stream *sp = (struct _mu_log_stream *)str;
  
  switch (code)
    {
    case MU_IOCTL_TRANSPORT:
      if (!arg)
	return EINVAL;
      else
	{
	  mu_transport_t *ptrans = arg;
	  switch (opcode)
	    {
	    case MU_IOCTL_OP_GET:
	      ptrans[0] = (mu_transport_t) sp->transport;
	      ptrans[1] = NULL;
	      break;

	    case MU_IOCTL_OP_SET:
	      ptrans = arg;
	      if (ptrans[0])
		sp->transport = (mu_stream_t) ptrans[0];
	      break;

	    default:
	      return EINVAL;
	    }
	}
      break;

    case MU_IOCTL_LOGSTREAM:
      switch (opcode)
	{
	case MU_IOCTL_LOGSTREAM_GET_SEVERITY:
	  if (!arg)
	    return EINVAL;
	  *(unsigned*)arg = sp->severity;
	  break;
      
	case MU_IOCTL_LOGSTREAM_SET_SEVERITY:
	  if (!arg)
	    return EINVAL;
	  if (*(unsigned*)arg >= _mu_severity_num)
	    return EINVAL;
	  sp->severity = *(unsigned*)arg;
	  break;

	case MU_IOCTL_LOGSTREAM_GET_MODE:
	  if (!arg)
	    return EINVAL;
	  *(int*)arg = sp->logmode;
	  break;

	case MU_IOCTL_LOGSTREAM_SET_MODE:
	  if (!arg)
	    return EINVAL;
	  sp->logmode = *(int*)arg;
	  break;
      
	case MU_IOCTL_LOGSTREAM_GET_LOCUS:
	  if (!arg)
	    return EINVAL;
	  else
	    {
	      struct mu_locus *ploc = arg;
	      if (sp->locus.mu_file)
		{
		  ploc->mu_file = strdup (sp->locus.mu_file);
		  if (!ploc->mu_file)
		    return ENOMEM;
		}
	      else
		ploc->mu_file = NULL;
	      ploc->mu_line = sp->locus.mu_line;
	      ploc->mu_col = sp->locus.mu_col;
	    }
	  break;
	
	case MU_IOCTL_LOGSTREAM_SET_LOCUS:
	  {
	    struct mu_locus *ploc = arg;
	    if (!arg)
	      {
		free (sp->locus.mu_file);
		sp->locus.mu_file = NULL;
		sp->locus.mu_line = 0;
		sp->locus.mu_col = 0;
	      }
	    else
	      {
		if (ploc->mu_file)
		  _locus_set_file (&sp->locus, ploc->mu_file,
				   strlen (ploc->mu_file));
		if (ploc->mu_line)
		  _locus_set_line (&sp->locus, ploc->mu_line);
		if (ploc->mu_col)
		  _locus_set_col (&sp->locus, ploc->mu_col);
	      }
	    break;
	  }

	case MU_IOCTL_LOGSTREAM_SET_LOCUS_LINE:
	  if (!arg)
	    return EINVAL;
	  sp->locus.mu_line = *(unsigned*)arg;
	  break;
	  
	case MU_IOCTL_LOGSTREAM_SET_LOCUS_COL:
	  if (!arg)
	    return EINVAL;
	  sp->locus.mu_col = *(unsigned*)arg;
	  break;
	  
	case MU_IOCTL_LOGSTREAM_ADVANCE_LOCUS_LINE:
	  if (!arg)
	    sp->locus.mu_line++;
	  else
	    sp->locus.mu_line += *(int*)arg;
	  break;

	case MU_IOCTL_LOGSTREAM_ADVANCE_LOCUS_COL:
	  if (!arg)
	    sp->locus.mu_col++;
	  else
	    sp->locus.mu_col += *(int*)arg;
	  break;

	case MU_IOCTL_LOGSTREAM_SUPPRESS_SEVERITY:
	  if (!arg)
	    sp->threshold = MU_LOG_DEBUG;
	  else if (*(unsigned*)arg >= _mu_severity_num)
	    return MU_ERR_NOENT;
	  sp->threshold = *(unsigned*)arg;
	  break;
	  
	case MU_IOCTL_LOGSTREAM_SUPPRESS_SEVERITY_NAME:
	  if (!arg)
	    sp->threshold = MU_LOG_DEBUG;
	  else
	    return mu_severity_from_string ((const char *) arg, &sp->threshold);

	case MU_IOCTL_LOGSTREAM_GET_SEVERITY_MASK:
	  if (!arg)
	    return EINVAL;
	  *(int*)arg = sp->sevmask;
	  break;

	case MU_IOCTL_LOGSTREAM_SET_SEVERITY_MASK:
	  if (!arg)
	    return EINVAL;
	  sp->sevmask = *(int*)arg;
	  break;

	case MU_IOCTL_LOGSTREAM_CLONE:
	  if (!arg)
	    return EINVAL;
	  else
	    {
	      mu_stream_t str;
	      struct _mu_log_stream *newp;
	      int rc = mu_log_stream_create (&str, sp->transport);
	      if (rc)
		return rc;
	      newp = (struct _mu_log_stream *) str;
	      newp->severity = sp->severity;
	      newp->threshold = sp->threshold;
	      newp->logmode = sp->logmode;
	      newp->sevmask = sp->sevmask;
	      if (sp->locus.mu_file)
		newp->locus.mu_file = strdup (sp->locus.mu_file);
	      newp->locus.mu_line = sp->locus.mu_line;
	      newp->locus.mu_col = sp->locus.mu_col;
	      *(mu_stream_t*) arg = str;
	    }
	  break;
	  
	default:
	  return EINVAL;
	}
      break;

    case MU_IOCTL_FILTER:
    case MU_IOCTL_SYSLOGSTREAM:
      return mu_stream_ioctl (sp->transport, code, opcode, arg);
            
    default:
      return ENOSYS;
    }
  return 0;
}

int
mu_log_stream_create (mu_stream_t *pstr, mu_stream_t transport)
{
  struct _mu_log_stream *sp;
  mu_stream_t stream;
  int rc;
  
  sp = (struct _mu_log_stream *)
    _mu_stream_create (sizeof (*sp), MU_STREAM_WRITE);
  if (!sp)
    return ENOMEM;
  sp->base.write = _log_write;
  sp->base.flush = _log_flush;
  sp->base.close = _log_close;
  sp->base.done = _log_done;
  sp->base.setbuf_hook = _log_setbuf_hook;
  sp->base.ctl = _log_ctl;
  sp->transport = transport;
  mu_stream_ref (transport);
  sp->severity = MU_LOG_ERROR;
  sp->logmode = 0;
  
  stream = (mu_stream_t) sp;
  mu_stream_set_buffer (stream, mu_buffer_line, 0);
  rc = mu_stream_open (stream);
  if (rc)
    mu_stream_destroy (&stream);
  else
    *pstr = stream;

  return rc;
}


Return to:

Send suggestions and report system problems to the System administrator.