1 # include <errno.h>
2 # include "sendmail.h"
3 
4 static char	SccsId[] = "@(#)collect.c	3.21	09/07/81";
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 **		none
23 **
24 **	Returns:
25 **		none.
26 **
27 **	Side Effects:
28 **		Temp file is created and filled.
29 **		The from person may be set.
30 */
31 
32 long	MsgSize;		/* size of message in bytes */
33 FILE	*TempFile;		/* the tempfile (after creation) */
34 
35 collect()
36 {
37 	register FILE *tf;
38 	char buf[MAXFIELD+1];
39 	register char *p;
40 	char *xfrom;
41 	extern char *hvalue();
42 	extern char *mktemp();
43 
44 	/*
45 	**  Create the temp file name and create the file.
46 	*/
47 
48 	(void) mktemp(InFileName);
49 	(void) close(creat(InFileName, 0600));
50 	if ((tf = fopen(InFileName, "w")) == NULL)
51 	{
52 		syserr("Cannot create %s", InFileName);
53 		return;
54 	}
55 
56 	/*
57 	**  Tell ARPANET to go ahead.
58 	*/
59 
60 	if (ArpaMode == ARPA_MAIL)
61 	{
62 		extern char Arpa_Enter[];
63 
64 		message(Arpa_Enter, "Enter mail, end with \".\" on a line by itself");
65 	}
66 
67 	/*
68 	**  Try to read a UNIX-style From line
69 	*/
70 
71 	if (fgets(buf, sizeof buf, stdin) == NULL)
72 		return;
73 # ifndef NOTUNIX
74 	if (!SaveFrom && strncmp(buf, "From ", 5) == 0)
75 	{
76 		eatfrom(buf);
77 		(void) fgets(buf, sizeof buf, stdin);
78 	}
79 # endif NOTUNIX
80 
81 	/*
82 	**  Copy stdin to temp file & do message editting.
83 	**	To keep certain mailers from getting confused,
84 	**	and to keep the output clean, lines that look
85 	**	like UNIX "From" lines are deleted in the header,
86 	**	and prepended with ">" in the body.
87 	*/
88 
89 	for (; !feof(stdin); !feof(stdin) && fgets(buf, sizeof buf, stdin))
90 	{
91 		register char c;
92 		extern bool isheader();
93 
94 		/* see if the header is over */
95 		if (!isheader(buf))
96 			break;
97 
98 		/* get the rest of this field */
99 		while ((c = getc(stdin)) == ' ' || c == '\t')
100 		{
101 			p = &buf[strlen(buf)];
102 			*p++ = c;
103 			if (fgets(p, sizeof buf - (p - buf), stdin) == NULL)
104 				break;
105 		}
106 		if (!feof(stdin))
107 			(void) ungetc(c, stdin);
108 
109 		MsgSize += strlen(buf);
110 
111 		/*
112 		**  Snarf header away.
113 		*/
114 
115 		if (bitset(H_EOH, chompheader(buf, FALSE)))
116 			break;
117 	}
118 
119 # ifdef DEBUG
120 	if (Debug)
121 		printf("EOH\n");
122 # endif DEBUG
123 
124 	/* throw away a blank line */
125 	if (buf[0] == '\n')
126 		(void) fgets(buf, sizeof buf, stdin);
127 
128 	/*
129 	**  Collect the body of the message.
130 	*/
131 
132 	for (; !feof(stdin); !feof(stdin) && fgets(buf, sizeof buf, stdin) != NULL)
133 	{
134 		register int i;
135 
136 		/* check for end-of-message */
137 		if (!IgnrDot && buf[0] == '.' && (buf[1] == '\n' || buf[1] == '\0'))
138 			break;
139 
140 # ifndef NOTUNIX
141 		/* Hide UNIX-like From lines */
142 		if (strncmp(buf, "From ", 5) == 0)
143 		{
144 			fputs(">", tf);
145 			MsgSize++;
146 		}
147 # endif NOTUNIX
148 
149 		/*
150 		**  Figure message length, output the line to the temp
151 		**  file, and insert a newline if missing.
152 		*/
153 
154 		i = strlen(buf);
155 		MsgSize += i;
156 		fputs(buf, tf);
157 		if (buf[i - 1] != '\n')
158 			fputs("\n", tf);
159 		if (ferror(tf))
160 		{
161 			if (errno == ENOSPC)
162 			{
163 				(void) freopen(InFileName, "w", tf);
164 				fputs("\nMAIL DELETED BECAUSE OF LACK OF DISK SPACE\n\n", tf);
165 				syserr("Out of disk space for temp file");
166 			}
167 			else
168 				syserr("Cannot write %s", InFileName);
169 			(void) freopen("/dev/null", "w", tf);
170 		}
171 	}
172 	(void) fclose(tf);
173 
174 	/*
175 	**  Find out some information from the headers.
176 	**	Examples are who is the from person & the date.
177 	*/
178 
179 	/* from person */
180 	xfrom = hvalue("sender");
181 	if (xfrom == NULL)
182 		xfrom = hvalue("original-from");
183 	if (ArpaMode != ARPA_NONE)
184 		setfrom(xfrom, (char *) NULL);
185 
186 	/* full name of from person */
187 	p = hvalue("full-name");
188 	if (p != NULL)
189 		define('x', p);
190 	else
191 	{
192 		register char *q;
193 
194 		/*
195 		**  Try to extract the full name from a general From:
196 		**  field.  We take anything which is a comment as a
197 		**  first choice.  Failing in that, we see if there is
198 		**  a "machine readable" name (in <angle brackets>); if
199 		**  so we take anything preceeding that clause.
200 		**
201 		**  If we blow it here it's not all that serious.
202 		*/
203 
204 		p = hvalue("original-from");
205 		q = index(p, '(');
206 		if (q != NULL)
207 		{
208 			int parenlev = 0;
209 
210 			for (p = q; *p != '\0'; p++)
211 			{
212 				if (*p == '(')
213 					parenlev++;
214 				else if (*p == ')' && --parenlev <= 0)
215 					break;
216 			}
217 			if (*p == ')')
218 			{
219 				*p = '\0';
220 				if (*++q != '\0')
221 					define('x', newstr(q));
222 				*p = ')';
223 			}
224 		}
225 		else if ((q = index(p, '<')) != NULL)
226 		{
227 			char savec;
228 
229 			while (*--q == ' ')
230 				continue;
231 			while (isspace(*p))
232 				p++;
233 			savec = *++q;
234 			*q = '\0';
235 			if (*p != '\0')
236 				define('x', newstr(p));
237 			*q = savec;
238 		}
239 	}
240 
241 	/* date message originated */
242 	p = hvalue("posted-date");
243 	if (p == NULL)
244 		p = hvalue("date");
245 	if (p != NULL)
246 	{
247 		define('a', p);
248 		/* we don't have a good way to do canonical conversion ....
249 		define('d', newstr(arpatounix(p)));
250 		.... so we will ignore the problem for the time being */
251 	}
252 
253 	if ((TempFile = fopen(InFileName, "r")) == NULL)
254 		syserr("Cannot reopen %s", InFileName);
255 
256 # ifdef DEBUG
257 	if (Debug)
258 	{
259 		HDR *h;
260 		extern char *capitalize();
261 
262 		printf("----- collected header -----\n");
263 		for (h = Header; h != NULL; h = h->h_link)
264 			printf("%s: %s\n", capitalize(h->h_field), h->h_value);
265 		printf("----------------------------\n");
266 	}
267 # endif DEBUG
268 	return;
269 }
270 /*
271 **  EATFROM -- chew up a UNIX style from line and process
272 **
273 **	This does indeed make some assumptions about the format
274 **	of UNIX messages.
275 **
276 **	Parameters:
277 **		fm -- the from line.
278 **
279 **	Returns:
280 **		none.
281 **
282 **	Side Effects:
283 **		extracts what information it can from the header,
284 **		such as the date.
285 */
286 
287 # ifndef NOTUNIX
288 
289 char	*DowList[] =
290 {
291 	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL
292 };
293 
294 char	*MonthList[] =
295 {
296 	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
297 	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
298 	NULL
299 };
300 
301 eatfrom(fm)
302 	char *fm;
303 {
304 	register char *p;
305 	register char **dt;
306 
307 # ifdef DEBUG
308 	if (Debug > 1)
309 		printf("eatfrom(%s)\n", fm);
310 # endif DEBUG
311 
312 	/* find the date part */
313 	p = fm;
314 	while (*p != '\0')
315 	{
316 		/* skip a word */
317 		while (*p != '\0' && *p != ' ')
318 			*p++;
319 		while (*p == ' ')
320 			*p++;
321 		if (!isupper(*p) || p[3] != ' ' || p[13] != ':' || p[16] != ':')
322 			continue;
323 
324 		/* we have a possible date */
325 		for (dt = DowList; *dt != NULL; dt++)
326 			if (strncmp(*dt, p, 3) == 0)
327 				break;
328 		if (*dt == NULL)
329 			continue;
330 
331 		for (dt = MonthList; *dt != NULL; dt++)
332 			if (strncmp(*dt, &p[4], 3) == 0)
333 				break;
334 		if (*dt != NULL)
335 			break;
336 	}
337 
338 	if (*p != NULL)
339 	{
340 		char *q;
341 
342 		/* we have found a date */
343 		q = xalloc(25);
344 		strncpy(q, p, 25);
345 		q[24] = '\0';
346 		define('d', q);
347 	}
348 }
349 
350 # endif NOTUNIX
351