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
|
/*
* Copyright (c) 1998-2001 Sendmail, Inc. and its suppliers.
* All rights reserved.
* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* By using this file, you agree to the terms and conditions set
* forth in the LICENSE file which can be found at the top level of
* the sendmail distribution.
*
* $FreeBSD$
*
*/
#include <sm/gen.h>
SM_IDSTR(copyright,
"@(#) Copyright (c) 1998-2001 Sendmail, Inc. and its suppliers.\n\
All rights reserved.\n\
Copyright (c) 1988, 1993\n\
The Regents of the University of California. All rights reserved.\n")
SM_IDSTR(id, "@(#)$Id: rmail.c,v 8.61 2001/09/18 21:45:29 gshapiro Exp $")
/*
* RMAIL -- UUCP mail server.
*
* This program reads the >From ... remote from ... lines that UUCP is so
* fond of and turns them into something reasonable. It then execs sendmail
* with various options built from these lines.
*
* The expected syntax is:
*
* <user> := [-a-z0-9]+
* <date> := ctime format
* <site> := [-a-z0-9!]+
* <blank line> := "^\n$"
* <from> := "From" <space> <user> <space> <date>
* [<space> "remote from" <space> <site>]
* <forward> := ">" <from>
* msg := <from> <forward>* <blank-line> <body>
*
* The output of rmail(8) compresses the <forward> lines into a single
* from path.
*
* The err(3) routine is included here deliberately to make this code
* a bit more portable.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <ctype.h>
#include <fcntl.h>
#include <sm/io.h>
#include <stdlib.h>
#include <sm/string.h>
#include <unistd.h>
#ifdef EX_OK
# undef EX_OK /* unistd.h may have another use for this */
#endif /* EX_OK */
#include <sysexits.h>
#include <sm/conf.h>
#include <sm/errstring.h>
#include <sendmail/pathnames.h>
static void err __P((int, const char *, ...));
static void usage __P((void));
static char *xalloc __P((int));
#define newstr(s) strcpy(xalloc(strlen(s) + 1), s)
static char *
xalloc(sz)
register int sz;
{
register char *p;
/* some systems can't handle size zero mallocs */
if (sz <= 0)
sz = 1;
p = malloc(sz);
if (p == NULL)
err(EX_TEMPFAIL, "out of memory");
return (p);
}
int
main(argc, argv)
int argc;
char *argv[];
{
int ch, debug, i, pdes[2], pid, status;
size_t fplen = 0, fptlen = 0, len;
off_t offset;
SM_FILE_T *fp;
char *addrp = NULL, *domain, *p, *t;
char *from_path, *from_sys, *from_user;
char **args, buf[2048], lbuf[2048];
struct stat sb;
extern char *optarg;
extern int optind;
debug = 0;
domain = "UUCP"; /* Default "domain". */
while ((ch = getopt(argc, argv, "D:T")) != -1)
{
switch (ch)
{
case 'T':
debug = 1;
break;
case 'D':
domain = optarg;
break;
case '?':
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc < 1)
usage();
from_path = from_sys = from_user = NULL;
for (offset = 0; ; )
{
/* Get and nul-terminate the line. */
if (sm_io_fgets(smioin, SM_TIME_DEFAULT, lbuf,
sizeof(lbuf)) == NULL)
err(EX_DATAERR, "no data");
if ((p = strchr(lbuf, '\n')) == NULL)
err(EX_DATAERR, "line too long");
*p = '\0';
/* Parse lines until reach a non-"From" line. */
if (!strncmp(lbuf, "From ", 5))
addrp = lbuf + 5;
else if (!strncmp(lbuf, ">From ", 6))
addrp = lbuf + 6;
else if (offset == 0)
err(EX_DATAERR,
"missing or empty From line: %s", lbuf);
else
{
*p = '\n';
break;
}
if (addrp == NULL || *addrp == '\0')
err(EX_DATAERR, "corrupted From line: %s", lbuf);
/* Use the "remote from" if it exists. */
for (p = addrp; (p = strchr(p + 1, 'r')) != NULL; )
{
if (!strncmp(p, "remote from ", 12))
{
for (t = p += 12; *t != '\0'; ++t)
{
if (isascii(*t) && isspace(*t))
break;
}
*t = '\0';
if (debug)
(void) sm_io_fprintf(smioerr,
SM_TIME_DEFAULT,
"remote from: %s\n",
p);
break;
}
}
/* Else use the string up to the last bang. */
if (p == NULL)
{
if (*addrp == '!')
err(EX_DATAERR, "bang starts address: %s",
addrp);
else if ((t = strrchr(addrp, '!')) != NULL)
{
*t = '\0';
p = addrp;
addrp = t + 1;
if (*addrp == '\0')
err(EX_DATAERR,
"corrupted From line: %s", lbuf);
if (debug)
(void) sm_io_fprintf(smioerr,
SM_TIME_DEFAULT,
"bang: %s\n", p);
}
}
/* 'p' now points to any system string from this line. */
if (p != NULL)
{
/* Nul terminate it as necessary. */
for (t = p; *t != '\0'; ++t)
{
if (isascii(*t) && isspace(*t))
break;
}
*t = '\0';
/* If the first system, copy to the from_sys string. */
if (from_sys == NULL)
{
from_sys = newstr(p);
if (debug)
(void) sm_io_fprintf(smioerr,
SM_TIME_DEFAULT,
"from_sys: %s\n",
from_sys);
}
/* Concatenate to the path string. */
len = t - p;
if (from_path == NULL)
{
fplen = 0;
if ((from_path = malloc(fptlen = 256)) == NULL)
err(EX_TEMPFAIL, "out of memory");
}
if (fplen + len + 2 > fptlen)
{
fptlen += SM_MAX(fplen + len + 2, 256);
if ((from_path = realloc(from_path,
fptlen)) == NULL)
err(EX_TEMPFAIL, "out of memory");
}
memmove(from_path + fplen, p, len);
fplen += len;
from_path[fplen++] = '!';
from_path[fplen] = '\0';
}
/* Save off from user's address; the last one wins. */
for (p = addrp; *p != '\0'; ++p)
{
if (isascii(*p) && isspace(*p))
break;
}
*p = '\0';
if (*addrp == '\0')
addrp = "<>";
if (from_user != NULL)
free(from_user);
from_user = newstr(addrp);
if (debug)
{
if (from_path != NULL)
(void) sm_io_fprintf(smioerr, SM_TIME_DEFAULT,
"from_path: %s\n",
from_path);
(void) sm_io_fprintf(smioerr, SM_TIME_DEFAULT,
"from_user: %s\n", from_user);
}
if (offset != -1)
offset = (off_t)sm_io_tell(smioin, SM_TIME_DEFAULT);
}
/* Allocate args (with room for sendmail args as well as recipients */
args = (char **)xalloc(sizeof(*args) * (10 + argc));
i = 0;
args[i++] = _PATH_SENDMAIL; /* Build sendmail's argument list. */
args[i++] = "-G"; /* relay submission */
args[i++] = "-oee"; /* No errors, just status. */
#ifdef QUEUE_ONLY
args[i++] = "-odq"; /* Queue it, don't try to deliver. */
#else
args[i++] = "-odi"; /* Deliver in foreground. */
#endif
args[i++] = "-oi"; /* Ignore '.' on a line by itself. */
/* set from system and protocol used */
if (from_sys == NULL)
sm_snprintf(buf, sizeof(buf), "-p%s", domain);
else if (strchr(from_sys, '.') == NULL)
sm_snprintf(buf, sizeof(buf), "-p%s:%s.%s",
domain, from_sys, domain);
else
sm_snprintf(buf, sizeof(buf), "-p%s:%s", domain, from_sys);
args[i++] = newstr(buf);
/* Set name of ``from'' person. */
sm_snprintf(buf, sizeof(buf), "-f%s%s",
from_path ? from_path : "", from_user);
args[i++] = newstr(buf);
/*
** Don't copy arguments beginning with - as they will be
** passed to sendmail and could be interpreted as flags.
** To prevent confusion of sendmail wrap < and > around
** the address (helps to pass addrs like @gw1,@gw2:aa@bb)
*/
while (*argv != NULL)
{
if (**argv == '-')
err(EX_USAGE, "dash precedes argument: %s", *argv);
if (strchr(*argv, ',') == NULL || strchr(*argv, '<') != NULL)
args[i++] = *argv;
else
{
len = strlen(*argv) + 3;
if ((args[i] = malloc(len)) == NULL)
err(EX_TEMPFAIL, "Cannot malloc");
sm_snprintf(args[i++], len, "<%s>", *argv);
}
argv++;
argc--;
/* Paranoia check, argc used for args[] bound */
if (argc < 0)
err(EX_SOFTWARE, "Argument count mismatch");
}
args[i] = NULL;
if (debug)
{
(void) sm_io_fprintf(smioerr, SM_TIME_DEFAULT,
"Sendmail arguments:\n");
for (i = 0; args[i] != NULL; i++)
(void) sm_io_fprintf(smioerr, SM_TIME_DEFAULT,
"\t%s\n", args[i]);
}
/*
** If called with a regular file as standard input, seek to the right
** position in the file and just exec sendmail. Could probably skip
** skip the stat, but it's not unreasonable to believe that a failed
** seek will cause future reads to fail.
*/
if (!fstat(STDIN_FILENO, &sb) && S_ISREG(sb.st_mode))
{
if (lseek(STDIN_FILENO, offset, SEEK_SET) != offset)
err(EX_TEMPFAIL, "stdin seek");
(void) execv(_PATH_SENDMAIL, args);
err(EX_OSERR, "%s", _PATH_SENDMAIL);
}
if (pipe(pdes) < 0)
err(EX_OSERR, "pipe failed");
switch (pid = fork())
{
case -1: /* Err. */
err(EX_OSERR, "fork failed");
/* NOTREACHED */
case 0: /* Child. */
if (pdes[0] != STDIN_FILENO)
{
(void) dup2(pdes[0], STDIN_FILENO);
(void) close(pdes[0]);
}
(void) close(pdes[1]);
(void) execv(_PATH_SENDMAIL, args);
err(EX_UNAVAILABLE, "%s", _PATH_SENDMAIL);
/* NOTREACHED */
}
if ((fp = sm_io_open(SmFtStdiofd, SM_TIME_DEFAULT, (void *) &(pdes[1]),
SM_IO_WRONLY, NULL)) == NULL)
err(EX_OSERR, "sm_io_open failed");
(void) close(pdes[0]);
/* Copy the file down the pipe. */
do
{
(void) sm_io_fprintf(fp, SM_TIME_DEFAULT, "%s", lbuf);
} while (sm_io_fgets(smioin, SM_TIME_DEFAULT, lbuf,
sizeof(lbuf)) != NULL);
if (sm_io_error(smioin))
err(EX_TEMPFAIL, "stdin: %s", sm_errstring(errno));
if (sm_io_close(fp, SM_TIME_DEFAULT))
err(EX_OSERR, "sm_io_close failed");
if ((waitpid(pid, &status, 0)) == -1)
err(EX_OSERR, "%s", _PATH_SENDMAIL);
if (!WIFEXITED(status))
err(EX_OSERR, "%s: did not terminate normally", _PATH_SENDMAIL);
if (WEXITSTATUS(status))
err(status, "%s: terminated with %d (non-zero) status",
_PATH_SENDMAIL, WEXITSTATUS(status));
exit(EX_OK);
/* NOTREACHED */
return EX_OK;
}
static void
usage()
{
(void) sm_io_fprintf(smioerr, SM_TIME_DEFAULT,
"usage: rmail [-T] [-D domain] user ...\n");
exit(EX_USAGE);
}
static void
#ifdef __STDC__
err(int eval, const char *fmt, ...)
#else /* __STDC__ */
err(eval, fmt, va_alist)
int eval;
const char *fmt;
va_dcl
#endif /* __STDC__ */
{
SM_VA_LOCAL_DECL
if (fmt != NULL)
{
SM_VA_START(ap, fmt);
(void) sm_io_fprintf(smioerr, SM_TIME_DEFAULT, "rmail: ");
(void) sm_io_vfprintf(smioerr, SM_TIME_DEFAULT, fmt, ap);
SM_VA_END(ap);
(void) sm_io_fprintf(smioerr, SM_TIME_DEFAULT, "\n");
}
exit(eval);
}
|
