1/*
2 * Copyright (c) 1980, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#ifndef lint
31static char copyright[] =
32"@(#) Copyright (c) 1980, 1993\n\
33	The Regents of the University of California.  All rights reserved.\n";
34#endif /* not lint */
35
36#ifndef lint
37#if 0
38static char sccsid[] = "@(#)main.c	8.2 (Berkeley) 4/20/95";
39#endif
40#endif /* not lint */
41#include <sys/cdefs.h>
42__FBSDID("$FreeBSD$");
43
44#include "rcv.h"
45#include <fcntl.h>
46#include "extern.h"
47
48/*
49 * Mail -- a mail program
50 *
51 * Startup -- interface with user.
52 */
53
54static jmp_buf	hdrjmp;
55
56extern const char *version;
57
58int
59main(int argc, char *argv[])
60{
61	int i;
62	struct name *to, *cc, *bcc, *smopts;
63	char *subject, *replyto;
64	char *ef, *rc;
65	char nosrc = 0;
66	sig_t prevint;
67
68	/*
69	 * Set up a reasonable environment.
70	 * Figure out whether we are being run interactively,
71	 * start the SIGCHLD catcher, and so forth.
72	 */
73	(void)signal(SIGCHLD, sigchild);
74	if (isatty(0))
75		assign("interactive", "");
76	image = -1;
77	/*
78	 * Now, determine how we are being used.
79	 * We successively pick off - flags.
80	 * If there is anything left, it is the base of the list
81	 * of users to mail to.  Argp will be set to point to the
82	 * first of these users.
83	 */
84	ef = NULL;
85	to = NULL;
86	cc = NULL;
87	bcc = NULL;
88	smopts = NULL;
89	subject = NULL;
90	while ((i = getopt(argc, argv, "FEHINT:b:c:edfins:u:v")) != -1) {
91		switch (i) {
92		case 'T':
93			/*
94			 * Next argument is temp file to write which
95			 * articles have been read/deleted for netnews.
96			 */
97			Tflag = optarg;
98			if ((i = open(Tflag, O_CREAT | O_TRUNC | O_WRONLY,
99			    0600)) < 0)
100				err(1, "%s", Tflag);
101			(void)close(i);
102			break;
103		case 'u':
104			/*
105			 * Next argument is person to pretend to be.
106			 */
107			myname = optarg;
108			unsetenv("MAIL");
109			break;
110		case 'i':
111			/*
112			 * User wants to ignore interrupts.
113			 * Set the variable "ignore"
114			 */
115			assign("ignore", "");
116			break;
117		case 'd':
118			debug++;
119			break;
120		case 'e':
121			/*
122			 * User wants to check mail and exit.
123			 */
124			assign("checkmode", "");
125			break;
126		case 'H':
127			/*
128			 * User wants a header summary only.
129			 */
130			assign("headersummary", "");
131			break;
132		case 'F':
133			/*
134			 * User wants to record messages to files
135			 * named after first recipient username.
136			 */
137			assign("recordrecip", "");
138			break;
139		case 's':
140			/*
141			 * Give a subject field for sending from
142			 * non terminal
143			 */
144			subject = optarg;
145			break;
146		case 'f':
147			/*
148			 * User is specifying file to "edit" with Mail,
149			 * as opposed to reading system mailbox.
150			 * If no argument is given after -f, we read his
151			 * mbox file.
152			 *
153			 * getopt() can't handle optional arguments, so here
154			 * is an ugly hack to get around it.
155			 */
156			if ((argv[optind] != NULL) && (argv[optind][0] != '-'))
157				ef = argv[optind++];
158			else
159				ef = "&";
160			break;
161		case 'n':
162			/*
163			 * User doesn't want to source /usr/lib/Mail.rc
164			 */
165			nosrc++;
166			break;
167		case 'N':
168			/*
169			 * Avoid initial header printing.
170			 */
171			assign("noheader", "");
172			break;
173		case 'v':
174			/*
175			 * Send mailer verbose flag
176			 */
177			assign("verbose", "");
178			break;
179		case 'I':
180			/*
181			 * We're interactive
182			 */
183			assign("interactive", "");
184			break;
185		case 'c':
186			/*
187			 * Get Carbon Copy Recipient list
188			 */
189			cc = cat(cc, nalloc(optarg, GCC));
190			break;
191		case 'b':
192			/*
193			 * Get Blind Carbon Copy Recipient list
194			 */
195			bcc = cat(bcc, nalloc(optarg, GBCC));
196			break;
197		case 'E':
198			/*
199			 * Don't send empty files.
200			 */
201			assign("dontsendempty", "");
202			break;
203		case '?':
204			fprintf(stderr, "\
205Usage: %s [-dEiInv] [-s subject] [-c cc-addr] [-b bcc-addr] [-F] to-addr ...\n\
206       %*s [-sendmail-option ...]\n\
207       %s [-dEHiInNv] [-F] -f [name]\n\
208       %s [-dEHiInNv] [-F] [-u user]\n\
209       %s [-d] -e [-f name]\n", __progname, (int)strlen(__progname), "",
210				__progname, __progname, __progname);
211			exit(1);
212		}
213	}
214	for (i = optind; (argv[i] != NULL) && (*argv[i] != '-'); i++)
215		to = cat(to, nalloc(argv[i], GTO));
216	for (; argv[i] != NULL; i++)
217		smopts = cat(smopts, nalloc(argv[i], 0));
218	/*
219	 * Check for inconsistent arguments.
220	 */
221	if (to == NULL && (subject != NULL || cc != NULL || bcc != NULL))
222		errx(1, "You must specify direct recipients with -s, -c, or -b.");
223	if (ef != NULL && to != NULL)
224		errx(1, "Cannot give -f and people to send to.");
225	tinit();
226	setscreensize();
227	input = stdin;
228	rcvmode = !to;
229	spreserve();
230	if (!nosrc) {
231		char *s, *path_rc;
232
233		if ((path_rc = malloc(sizeof(_PATH_MASTER_RC))) == NULL)
234			err(1, "malloc(path_rc) failed");
235
236		strcpy(path_rc, _PATH_MASTER_RC);
237		while ((s = strsep(&path_rc, ":")) != NULL)
238			if (*s != '\0')
239				load(s);
240	}
241	/*
242	 * Expand returns a savestr, but load only uses the file name
243	 * for fopen, so it's safe to do this.
244	 */
245	if ((rc = getenv("MAILRC")) == NULL)
246		rc = "~/.mailrc";
247	load(expand(rc));
248
249	replyto = value("REPLYTO");
250	if (!rcvmode) {
251		mail(to, cc, bcc, smopts, subject, replyto);
252		/*
253		 * why wait?
254		 */
255		exit(senderr);
256	}
257
258	if(value("checkmode") != NULL) {
259		if (ef == NULL)
260			ef = "%";
261		if (setfile(ef) <= 0)
262			/* Either an error has occurred, or no mail */
263			exit(1);
264		else
265			exit(0);
266		/* NOTREACHED */
267	}
268
269	/*
270	 * Ok, we are reading mail.
271	 * Decide whether we are editing a mailbox or reading
272	 * the system mailbox, and open up the right stuff.
273	 */
274	if (ef == NULL)
275		ef = "%";
276	if (setfile(ef) < 0)
277		exit(1);		/* error already reported */
278	if (setjmp(hdrjmp) == 0) {
279		if ((prevint = signal(SIGINT, SIG_IGN)) != SIG_IGN)
280			(void)signal(SIGINT, hdrstop);
281		if (value("quiet") == NULL)
282			printf("Mail version %s.  Type ? for help.\n",
283				version);
284		announce();
285		(void)fflush(stdout);
286		(void)signal(SIGINT, prevint);
287	}
288
289	/* If we were in header summary mode, it's time to exit. */
290	if (value("headersummary") != NULL)
291		exit(0);
292
293	commands();
294	(void)signal(SIGHUP, SIG_IGN);
295	(void)signal(SIGINT, SIG_IGN);
296	(void)signal(SIGQUIT, SIG_IGN);
297	quit();
298	exit(0);
299}
300
301/*
302 * Interrupt printing of the headers.
303 */
304/*ARGSUSED*/
305void
306hdrstop(int signo __unused)
307{
308
309	(void)fflush(stdout);
310	fprintf(stderr, "\nInterrupt\n");
311	longjmp(hdrjmp, 1);
312}
313
314/*
315 * Compute what the screen size for printing headers should be.
316 * We use the following algorithm for the height:
317 *	If baud rate < 1200, use  9
318 *	If baud rate = 1200, use 14
319 *	If baud rate > 1200, use 24 or ws_row
320 * Width is either 80 or ws_col;
321 */
322void
323setscreensize(void)
324{
325	struct termios tbuf;
326	struct winsize ws;
327	speed_t speed;
328
329	if (ioctl(1, TIOCGWINSZ, (char *)&ws) < 0)
330		ws.ws_col = ws.ws_row = 0;
331	if (tcgetattr(1, &tbuf) < 0)
332		speed = B9600;
333	else
334		speed = cfgetospeed(&tbuf);
335	if (speed < B1200)
336		screenheight = 9;
337	else if (speed == B1200)
338		screenheight = 14;
339	else if (ws.ws_row != 0)
340		screenheight = ws.ws_row;
341	else
342		screenheight = 24;
343	if ((realscreenheight = ws.ws_row) == 0)
344		realscreenheight = 24;
345	if ((screenwidth = ws.ws_col) == 0)
346		screenwidth = 80;
347}
348