1 # include <errno.h>
2 # include "sendmail.h"
3 
4 static char	SccsId[] = "@(#)collect.c	3.28	10/31/81";
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 	/* message priority */
197 	p = hvalue("priority");
198 	if (p != NULL)
199 		MsgPriority = priencode(p);
200 
201 	/* from person */
202 	xfrom = hvalue("sender");
203 	if (xfrom == NULL)
204 		xfrom = OrigFrom;
205 	if (ArpaMode)
206 		setfrom(xfrom, (char *) NULL);
207 
208 	/* full name of from person */
209 	p = hvalue("full-name");
210 	if (p != NULL)
211 		define('x', p);
212 	else
213 	{
214 		register char *q;
215 
216 		/*
217 		**  Try to extract the full name from a general From:
218 		**  field.  We take anything which is a comment as a
219 		**  first choice.  Failing in that, we see if there is
220 		**  a "machine readable" name (in <angle brackets>); if
221 		**  so we take anything preceeding that clause.
222 		**
223 		**  If we blow it here it's not all that serious.
224 		*/
225 
226 		p = hvalue("original-from");
227 		if (p == NULL)
228 			p = OrigFrom;
229 		q = index(p, '(');
230 		if (q != NULL)
231 		{
232 			int parenlev = 0;
233 
234 			for (p = q; *p != '\0'; p++)
235 			{
236 				if (*p == '(')
237 					parenlev++;
238 				else if (*p == ')' && --parenlev <= 0)
239 					break;
240 			}
241 			if (*p == ')')
242 			{
243 				*p = '\0';
244 				if (*++q != '\0')
245 					define('x', newstr(q));
246 				*p = ')';
247 			}
248 		}
249 		else if ((q = index(p, '<')) != NULL)
250 		{
251 			char savec;
252 
253 			while (*--q == ' ')
254 				continue;
255 			while (isspace(*p))
256 				p++;
257 			savec = *++q;
258 			*q = '\0';
259 			if (*p != '\0')
260 				define('x', newstr(p));
261 			*q = savec;
262 		}
263 	}
264 
265 	/* date message originated */
266 	p = hvalue("posted-date");
267 	if (p == NULL)
268 		p = hvalue("date");
269 	if (p != NULL)
270 	{
271 		define('a', p);
272 		/* we don't have a good way to do canonical conversion ....
273 		define('d', newstr(arpatounix(p)));
274 		.... so we will ignore the problem for the time being */
275 	}
276 
277 	if ((TempFile = fopen(InFileName, "r")) == NULL)
278 		syserr("Cannot reopen %s", InFileName);
279 
280 # ifdef DEBUG
281 	if (Debug)
282 	{
283 		HDR *h;
284 		extern char *capitalize();
285 
286 		printf("----- collected header -----\n");
287 		for (h = Header; h != NULL; h = h->h_link)
288 			printf("%s: %s\n", capitalize(h->h_field), h->h_value);
289 		printf("----------------------------\n");
290 	}
291 # endif DEBUG
292 	return;
293 }
294 /*
295 **  EATFROM -- chew up a UNIX style from line and process
296 **
297 **	This does indeed make some assumptions about the format
298 **	of UNIX messages.
299 **
300 **	Parameters:
301 **		fm -- the from line.
302 **
303 **	Returns:
304 **		none.
305 **
306 **	Side Effects:
307 **		extracts what information it can from the header,
308 **		such as the date.
309 */
310 
311 # ifndef NOTUNIX
312 
313 char	*DowList[] =
314 {
315 	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL
316 };
317 
318 char	*MonthList[] =
319 {
320 	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
321 	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
322 	NULL
323 };
324 
325 eatfrom(fm)
326 	char *fm;
327 {
328 	register char *p;
329 	register char **dt;
330 
331 # ifdef DEBUG
332 	if (Debug > 1)
333 		printf("eatfrom(%s)\n", fm);
334 # endif DEBUG
335 
336 	/* find the date part */
337 	p = fm;
338 	while (*p != '\0')
339 	{
340 		/* skip a word */
341 		while (*p != '\0' && *p != ' ')
342 			*p++;
343 		while (*p == ' ')
344 			*p++;
345 		if (!isupper(*p) || p[3] != ' ' || p[13] != ':' || p[16] != ':')
346 			continue;
347 
348 		/* we have a possible date */
349 		for (dt = DowList; *dt != NULL; dt++)
350 			if (strncmp(*dt, p, 3) == 0)
351 				break;
352 		if (*dt == NULL)
353 			continue;
354 
355 		for (dt = MonthList; *dt != NULL; dt++)
356 			if (strncmp(*dt, &p[4], 3) == 0)
357 				break;
358 		if (*dt != NULL)
359 			break;
360 	}
361 
362 	if (*p != NULL)
363 	{
364 		char *q;
365 
366 		/* we have found a date */
367 		q = xalloc(25);
368 		strncpy(q, p, 25);
369 		q[24] = '\0';
370 		define('d', q);
371 	}
372 }
373 
374 # endif NOTUNIX
375 /*
376 **  PRIENCODE -- encode external priority names into internal values.
377 **
378 **	Parameters:
379 **		p -- priority in ascii.
380 **
381 **	Returns:
382 **		priority as a numeric level.
383 **
384 **	Side Effects:
385 **		none.
386 */
387 
388 struct prio
389 {
390 	char	*pri_name;	/* external name of priority */
391 	int	pri_val;	/* internal value for same */
392 };
393 
394 static struct prio	Prio[] =
395 {
396 	"alert",		PRI_ALERT,
397 	"quick",		PRI_QUICK,
398 	"first-class",		PRI_FIRSTCL,
399 	"normal",		PRI_NORMAL,
400 	"second-class",		PRI_SECONDCL,
401 	"third-class",		PRI_THIRDCL,
402 	NULL,			PRI_NORMAL,
403 };
404 
405 priencode(p)
406 	char *p;
407 {
408 	register struct prio *pl;
409 	extern bool sameword();
410 
411 	for (pl = Prio; pl->pri_name != NULL; pl++)
412 	{
413 		if (sameword(p, pl->pri_name))
414 			break;
415 	}
416 	return (pl->pri_val);
417 }
418