summaryrefslogtreecommitdiff
path: root/libmailutils/stream/iostream.c
blob: 577a9ddecdca7e59fa46a13315f853322969328b (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
/* GNU Mailutils -- a suite of utilities for electronic mail
   Copyright (C) 2010-2012, 2014-2017 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/alloc.h>
#include <mailutils/errno.h>

#include <mailutils/nls.h>
#include <mailutils/stream.h>
#include <mailutils/sys/stream.h>
#include <mailutils/sys/iostream.h>

static int
_iostream_read (struct _mu_stream *str, char *buf, size_t bufsize,
		size_t *pnread)
{
  struct _mu_iostream *sp = (struct _mu_iostream *)str;
  int rc = mu_stream_read (sp->transport[_MU_STREAM_INPUT], buf, bufsize,
			   pnread);
  if (rc)
    sp->last_err_str = _MU_STREAM_INPUT;
  return rc;
}

static int
_iostream_readdelim (struct _mu_stream *str, char *buf, size_t bufsize,
		    int delim, size_t *pnread)
{
  struct _mu_iostream *sp = (struct _mu_iostream *)str;
  int rc = mu_stream_readdelim (sp->transport[_MU_STREAM_INPUT], buf,
				bufsize, delim, pnread);
  if (rc)
    sp->last_err_str = _MU_STREAM_INPUT;
  return rc;
}

static int
_iostream_write (struct _mu_stream *str, const char *buf, size_t bufsize,
		  size_t *pnwrite)
{
  struct _mu_iostream *sp = (struct _mu_iostream *)str;
  int rc = mu_stream_write (sp->transport[_MU_STREAM_OUTPUT], buf, bufsize,
			    pnwrite);
  if (rc)
    sp->last_err_str = _MU_STREAM_OUTPUT;
  return rc;
}

static int
_iostream_flush (struct _mu_stream *str)
{
  struct _mu_iostream *sp = (struct _mu_iostream *)str;
  int rc = mu_stream_flush (sp->transport[_MU_STREAM_INPUT]);
  if (rc)
    {
      sp->last_err_str = _MU_STREAM_INPUT;
      return rc;
    }
  if (sp->transport[_MU_STREAM_INPUT] != sp->transport[_MU_STREAM_OUTPUT])
    {
      rc = mu_stream_flush (sp->transport[_MU_STREAM_OUTPUT]);
      if (rc)
	sp->last_err_str = _MU_STREAM_OUTPUT;
    }
  return rc;
}

static int
_iostream_open (struct _mu_stream *str)
{
  struct _mu_iostream *sp = (struct _mu_iostream *)str;
  int rc;
  rc = mu_stream_open (sp->transport[_MU_STREAM_INPUT]);
  if (rc)
    {
      sp->last_err_str = _MU_STREAM_INPUT;
      return rc;
    }
  if (sp->transport[_MU_STREAM_INPUT] != sp->transport[_MU_STREAM_OUTPUT])
    {
      rc = mu_stream_open (sp->transport[_MU_STREAM_OUTPUT]);
      if (rc)
	{
	  sp->last_err_str = _MU_STREAM_OUTPUT;
	  mu_stream_close (sp->transport[_MU_STREAM_INPUT]);
	}
    }
  return rc;
}

static int
_iostream_close (struct _mu_stream *str)
{
  struct _mu_iostream *sp = (struct _mu_iostream *)str;
  mu_stream_close (sp->transport[_MU_STREAM_INPUT]);
  mu_stream_close (sp->transport[_MU_STREAM_OUTPUT]);
  return 0;
}

static void
_iostream_done (struct _mu_stream *str)
{
  struct _mu_iostream *sp = (struct _mu_iostream *)str;
  mu_stream_unref (sp->transport[_MU_STREAM_INPUT]);
  mu_stream_unref (sp->transport[_MU_STREAM_OUTPUT]);
}

static int
_iostream_ctl (struct _mu_stream *str, int code, int opcode, void *arg)
{
  struct _mu_iostream *sp = (struct _mu_iostream *)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[_MU_STREAM_INPUT];
	      ptrans[1] = (mu_transport_t) sp->transport[_MU_STREAM_OUTPUT];
	      break;

	    case MU_IOCTL_OP_SET:
	      ptrans = arg;
	      sp->transport[_MU_STREAM_INPUT] = (mu_stream_t) ptrans[0];
	      sp->transport[_MU_STREAM_OUTPUT] = (mu_stream_t) ptrans[1];
	      break;

	    default:
	      return EINVAL;
	    }
	}
      break;

    case MU_IOCTL_SUBSTREAM:
    case MU_IOCTL_TOPSTREAM:
      if (!arg)
	return EINVAL;
      else
	{
	  mu_stream_t *pstr = arg;
	  switch (opcode)
	    {
	    case MU_IOCTL_OP_GET:
	      pstr[0] = sp->transport[0];
	      mu_stream_ref (pstr[0]);
	      pstr[1] = sp->transport[1];
	      mu_stream_ref (pstr[1]);
	      break;

	    case MU_IOCTL_OP_SET:
	      mu_stream_unref (sp->transport[0]);
	      sp->transport[0] = pstr[0];
	      mu_stream_ref (sp->transport[0]);
	      
	      mu_stream_unref (sp->transport[1]);
	      sp->transport[1] = pstr[1];
	      mu_stream_ref (sp->transport[1]);
	      break;

	    default:
	      return EINVAL;
	    }
	}
      break;

    case MU_IOCTL_TRANSPORT_BUFFER:
      if (!arg)
	return EINVAL;
      else
	{
	  struct mu_buffer_query *qp = arg;
	  if (!MU_TRANSPORT_VALID_TYPE (qp->type) || !sp->transport[qp->type])
	    return EINVAL;
	  return mu_stream_ioctl (sp->transport[qp->type], code, opcode, arg);
	}
      
    case MU_IOCTL_TCPSTREAM:
      return mu_stream_ioctl (sp->transport[0], code, opcode, arg);
      
    default:
      return ENOSYS;
    }
  return 0;
}

static int
_iostream_wait (struct _mu_stream *str, int *pflags, struct timeval *tvp)
{
  struct _mu_iostream *sp = (struct _mu_iostream *)str;
  int rc = EINVAL;
  
  if (*pflags == MU_STREAM_READY_RD)
    {
      rc = mu_stream_wait (sp->transport[_MU_STREAM_INPUT], pflags, tvp);
      if (rc)
	sp->last_err_str = _MU_STREAM_INPUT;
    }
  else if (*pflags == MU_STREAM_READY_WR)
    {
      rc = mu_stream_wait (sp->transport[_MU_STREAM_OUTPUT], pflags, tvp);
      if (rc)
	sp->last_err_str = _MU_STREAM_OUTPUT;
    }
  return rc;
}

static int
_iostream_shutdown (struct _mu_stream *str, int how)
{
  struct _mu_iostream *sp = (struct _mu_iostream *)str;
  int rc = EINVAL;
  switch (how)
    {
    case MU_STREAM_READ:
      rc = mu_stream_shutdown (sp->transport[_MU_STREAM_INPUT], how);
      if (rc)
	sp->last_err_str = _MU_STREAM_INPUT;
      break;
      
    case MU_STREAM_WRITE:
      rc = mu_stream_shutdown (sp->transport[_MU_STREAM_OUTPUT], how);
      if (rc)
	sp->last_err_str = _MU_STREAM_OUTPUT;
    }
  return rc;
}

static const char *
_iostream_error_string (struct _mu_stream *str, int rc)
{
  struct _mu_iostream *sp = (struct _mu_iostream *)str;
  mu_stream_t transport = sp->transport[sp->last_err_str];
  if (transport)
    return mu_stream_strerror (transport, rc);
  return mu_strerror (rc);
}

int
mu_iostream_create (mu_stream_t *pref, mu_stream_t in, mu_stream_t out)
{
  struct _mu_iostream *sp;

  sp = (struct _mu_iostream *)
    _mu_stream_create (sizeof (*sp),
		       MU_STREAM_READ | MU_STREAM_WRITE);
  if (!sp)
    return ENOMEM;

  sp->stream.flags |= _MU_STR_OPEN;
  sp->stream.read = _iostream_read; 
  if (in->readdelim)
    sp->stream.readdelim = _iostream_readdelim; 
  sp->stream.write = _iostream_write;
  sp->stream.flush = _iostream_flush;
  sp->stream.open = _iostream_open; 
  sp->stream.close = _iostream_close;
  sp->stream.done = _iostream_done; 
  sp->stream.ctl = _iostream_ctl;
  sp->stream.wait = _iostream_wait;
  sp->stream.shutdown = _iostream_shutdown;
  sp->stream.error_string = _iostream_error_string;

  mu_stream_ref (in);
  sp->transport[_MU_STREAM_INPUT] = in;
  mu_stream_ref (out);
  sp->transport[_MU_STREAM_OUTPUT] = out;

  mu_stream_set_buffer ((mu_stream_t) sp, mu_buffer_line, 0);
  *pref = (mu_stream_t) sp;
  return 0;
}


Return to:

Send suggestions and report system problems to the System administrator.