1 # include <errno.h>
2 # include "sendmail.h"
3 
4 static char	SccsId[] = "@(#)collect.c	3.29	11/22/81";
5 
6 /*
7 **  COLLECT -- read & parse message header & make temp file.
8 **
9 **	Creates a temporary file name and copies the standard
10 **	input to that file.  While it is doing it, it looks for
11 **	"From:" and "Sender:" fields to use as the from-person
12 **	(but only if the -a flag is specified).  It prefers to
13 **	to use the "Sender:" field.
14 **
15 **	MIT seems to like to produce "Sent-By:" fields instead
16 **	of "Sender:" fields.  We used to catch this, but it turns
17 **	out that the "Sent-By:" field doesn't always correspond
18 **	to someone real ("___057", for instance), as required by
19 **	the protocol.  So we limp by.....
20 **
21 **	Parameters:
22 **		sayok -- if set, give an ARPANET style message
23 **			to say we are ready to collect input.
24 **
25 **	Returns:
26 **		none.
27 **
28 **	Side Effects:
29 **		Temp file is created and filled.
30 **		The from person may be set.
31 */
32 
33 long	MsgSize;		/* size of message in bytes */
34 
35 collect(sayok)
36 	bool sayok;
37 {
38 	register FILE *tf;
39 	char buf[MAXFIELD+1];
40 	register char *p;
41 	char *xfrom;
42 	extern char *hvalue();
43 	extern char *mktemp();
44 	static char tempfname[40];
45 	extern char *QueueDir;
46 
47 	/*
48 	**  Create the temp file name and create the file.
49 	*/
50 
51 	strcpy(tempfname, QueueDir);
52 	strcat(tempfname, "/dfaXXXXXX");
53 	(void) mktemp(tempfname);
54 	(void) close(creat(tempfname, 0600));
55 	if ((tf = fopen(tempfname, "w")) == NULL)
56 	{
57 		syserr("Cannot create %s", tempfname);
58 		return;
59 	}
60 	InFileName = tempfname;
61 
62 	/*
63 	**  Tell ARPANET to go ahead.
64 	*/
65 
66 	if (sayok)
67 		message("354", "Enter mail, end with \".\" on a line by itself");
68 
69 	/*
70 	**  Try to read a UNIX-style From line
71 	*/
72 
73 	if (fgets(buf, sizeof buf, stdin) == NULL)
74 		return;
75 	fixcrlf(buf, FALSE);
76 # ifndef NOTUNIX
77 	if (!SaveFrom && strncmp(buf, "From ", 5) == 0)
78 	{
79 		eatfrom(buf);
80 		(void) fgets(buf, sizeof buf, stdin);
81 		fixcrlf(buf, FALSE);
82 	}
83 # endif NOTUNIX
84 
85 	/*
86 	**  Copy stdin to temp file & do message editting.
87 	**	To keep certain mailers from getting confused,
88 	**	and to keep the output clean, lines that look
89 	**	like UNIX "From" lines are deleted in the header,
90 	**	and prepended with ">" in the body.
91 	*/
92 
93 	for (; !feof(stdin); !feof(stdin) && fgets(buf, sizeof buf, stdin) != NULL)
94 	{
95 		register char c;
96 		extern bool isheader();
97 
98 		fixcrlf(buf, FALSE);
99 
100 		/* see if the header is over */
101 		if (!isheader(buf))
102 			break;
103 
104 		/* get the rest of this field */
105 		while ((c = getc(stdin)) == ' ' || c == '\t')
106 		{
107 			p = &buf[strlen(buf)];
108 			*p++ = c;
109 			if (fgets(p, sizeof buf - (p - buf), stdin) == NULL)
110 				break;
111 			fixcrlf(p, FALSE);
112 		}
113 		if (!feof(stdin))
114 			(void) ungetc(c, stdin);
115 
116 		MsgSize += strlen(buf);
117 
118 		/*
119 		**  Snarf header away.
120 		*/
121 
122 		if (bitset(H_EOH, chompheader(buf, FALSE)))
123 			break;
124 	}
125 
126 # ifdef DEBUG
127 	if (Debug)
128 		printf("EOH\n");
129 # endif DEBUG
130 
131 	/* throw away a blank line */
132 	if (buf[0] == '\n')
133 	{
134 		(void) fgets(buf, sizeof buf, stdin);
135 		fixcrlf(buf, FALSE);
136 	}
137 
138 	/*
139 	**  Collect the body of the message.
140 	*/
141 
142 	for (; !feof(stdin); !feof(stdin) && fgets(buf, sizeof buf, stdin) != NULL)
143 	{
144 		register int i;
145 		register char *bp = buf;
146 
147 		fixcrlf(buf, FALSE);
148 
149 		/* check for end-of-message */
150 		if (!IgnrDot && buf[0] == '.' && (buf[1] == '\n' || buf[1] == '\0'))
151 			break;
152 
153 		/* check for transparent dot */
154 		if (Smtp && *bp == '.')
155 			bp++;
156 
157 # ifndef NOTUNIX
158 		/* Hide UNIX-like From lines */
159 		if (strncmp(bp, "From ", 5) == 0)
160 		{
161 			fputs(">", tf);
162 			MsgSize++;
163 		}
164 # endif NOTUNIX
165 
166 		/*
167 		**  Figure message length, output the line to the temp
168 		**  file, and insert a newline if missing.
169 		*/
170 
171 		i = strlen(bp);
172 		MsgSize += i;
173 		fputs(bp, tf);
174 		if (bp[i - 1] != '\n')
175 			fputs("\n", tf);
176 		if (ferror(tf))
177 		{
178 			if (errno == ENOSPC)
179 			{
180 				(void) freopen(InFileName, "w", tf);
181 				fputs("\nMAIL DELETED BECAUSE OF LACK OF DISK SPACE\n\n", tf);
182 				usrerr("452 Out of disk space for temp file");
183 			}
184 			else
185 				syserr("collect: Cannot write %s", InFileName);
186 			(void) freopen("/dev/null", "w", tf);
187 		}
188 	}
189 	(void) fclose(tf);
190 
191 	/*
192 	**  Find out some information from the headers.
193 	**	Examples are who is the from person & the date.
194 	*/
195 
196 	if (!QueueRun)
197 	{
198 		/* adjust total priority by message priority */
199 		MsgPriority = MsgSize;
200 		p = hvalue("priority");
201 		if (p != NULL)
202 			MsgPriority -= priencode(p) * WKPRIFACT;
203 	}
204 
205 	/* from person */
206 	xfrom = hvalue("sender");
207 	if (xfrom == NULL)
208 		xfrom = OrigFrom;
209 	if (ArpaMode)
210 		setfrom(xfrom, (char *) NULL);
211 
212 	/* full name of from person */
213 	p = hvalue("full-name");
214 	if (p != NULL)
215 		define('x', p);
216 	else
217 	{
218 		register char *q;
219 
220 		/*
221 		**  Try to extract the full name from a general From:
222 		**  field.  We take anything which is a comment as a
223 		**  first choice.  Failing in that, we see if there is
224 		**  a "machine readable" name (in <angle brackets>); if
225 		**  so we take anything preceeding that clause.
226 		**
227 		**  If we blow it here it's not all that serious.
228 		*/
229 
230 		p = hvalue("original-from");
231 		if (p == NULL)
232 			p = OrigFrom;
233 		q = index(p, '(');
234 		if (q != NULL)
235 		{
236 			int parenlev = 0;
237 
238 			for (p = q; *p != '\0'; p++)
239 			{
240 				if (*p == '(')
241 					parenlev++;
242 				else if (*p == ')' && --parenlev <= 0)
243 					break;
244 			}
245 			if (*p == ')')
246 			{
247 				*p = '\0';
248 				if (*++q != '\0')
249 					define('x', newstr(q));
250 				*p = ')';
251 			}
252 		}
253 		else if ((q = index(p, '<')) != NULL)
254 		{
255 			char savec;
256 
257 			while (*--q == ' ')
258 				continue;
259 			while (isspace(*p))
260 				p++;
261 			savec = *++q;
262 			*q = '\0';
263 			if (*p != '\0')
264 				define('x', newstr(p));
265 			*q = savec;
266 		}
267 	}
268 
269 	/* date message originated */
270 	p = hvalue("posted-date");
271 	if (p == NULL)
272 		p = hvalue("date");
273 	if (p != NULL)
274 	{
275 		define('a', p);
276 		/* we don't have a good way to do canonical conversion ....
277 		define('d', newstr(arpatounix(p)));
278 		.... so we will ignore the problem for the time being */
279 	}
280 
281 	if ((TempFile = fopen(InFileName, "r")) == NULL)
282 		syserr("Cannot reopen %s", InFileName);
283 
284 # ifdef DEBUG
285 	if (Debug)
286 	{
287 		HDR *h;
288 		extern char *capitalize();
289 
290 		printf("----- collected header -----\n");
291 		for (h = Header; h != NULL; h = h->h_link)
292 			printf("%s: %s\n", capitalize(h->h_field), h->h_value);
293 		printf("----------------------------\n");
294 	}
295 # endif DEBUG
296 	return;
297 }
298 /*
299 **  EATFROM -- chew up a UNIX style from line and process
300 **
301 **	This does indeed make some assumptions about the format
302 **	of UNIX messages.
303 **
304 **	Parameters:
305 **		fm -- the from line.
306 **
307 **	Returns:
308 **		none.
309 **
310 **	Side Effects:
311 **		extracts what information it can from the header,
312 **		such as the date.
313 */
314 
315 # ifndef NOTUNIX
316 
317 char	*DowList[] =
318 {
319 	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL
320 };
321 
322 char	*MonthList[] =
323 {
324 	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
325 	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
326 	NULL
327 };
328 
329 eatfrom(fm)
330 	char *fm;
331 {
332 	register char *p;
333 	register char **dt;
334 
335 # ifdef DEBUG
336 	if (Debug > 1)
337 		printf("eatfrom(%s)\n", fm);
338 # endif DEBUG
339 
340 	/* find the date part */
341 	p = fm;
342 	while (*p != '\0')
343 	{
344 		/* skip a word */
345 		while (*p != '\0' && *p != ' ')
346 			*p++;
347 		while (*p == ' ')
348 			*p++;
349 		if (!isupper(*p) || p[3] != ' ' || p[13] != ':' || p[16] != ':')
350 			continue;
351 
352 		/* we have a possible date */
353 		for (dt = DowList; *dt != NULL; dt++)
354 			if (strncmp(*dt, p, 3) == 0)
355 				break;
356 		if (*dt == NULL)
357 			continue;
358 
359 		for (dt = MonthList; *dt != NULL; dt++)
360 			if (strncmp(*dt, &p[4], 3) == 0)
361 				break;
362 		if (*dt != NULL)
363 			break;
364 	}
365 
366 	if (*p != NULL)
367 	{
368 		char *q;
369 
370 		/* we have found a date */
371 		q = xalloc(25);
372 		strncpy(q, p, 25);
373 		q[24] = '\0';
374 		define('d', q);
375 	}
376 }
377 
378 # endif NOTUNIX
379 /*
380 **  PRIENCODE -- encode external priority names into internal values.
381 **
382 **	Parameters:
383 **		p -- priority in ascii.
384 **
385 **	Returns:
386 **		priority as a numeric level.
387 **
388 **	Side Effects:
389 **		none.
390 */
391 
392 struct prio
393 {
394 	char	*pri_name;	/* external name of priority */
395 	int	pri_val;	/* internal value for same */
396 };
397 
398 static struct prio	Prio[] =
399 {
400 	"alert",		PRI_ALERT,
401 	"quick",		PRI_QUICK,
402 	"first-class",		PRI_FIRSTCL,
403 	"normal",		PRI_NORMAL,
404 	"second-class",		PRI_SECONDCL,
405 	"third-class",		PRI_THIRDCL,
406 	NULL,			PRI_NORMAL,
407 };
408 
409 priencode(p)
410 	char *p;
411 {
412 	register struct prio *pl;
413 	extern bool sameword();
414 
415 	for (pl = Prio; pl->pri_name != NULL; pl++)
416 	{
417 		if (sameword(p, pl->pri_name))
418 			break;
419 	}
420 	return (pl->pri_val);
421 }
422