GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/mail/lex.c Lines: 0 322 0.0 %
Date: 2016-12-06 Branches: 0 256 0.0 %

Line Branch Exec Source
1
/*	$OpenBSD: lex.c,v 1.39 2015/10/16 17:56:07 mmcc Exp $	*/
2
/*	$NetBSD: lex.c,v 1.10 1997/05/17 19:55:13 pk Exp $	*/
3
4
/*
5
 * Copyright (c) 1980, 1993
6
 *	The Regents of the University of California.  All rights reserved.
7
 *
8
 * Redistribution and use in source and binary forms, with or without
9
 * modification, are permitted provided that the following conditions
10
 * are met:
11
 * 1. Redistributions of source code must retain the above copyright
12
 *    notice, this list of conditions and the following disclaimer.
13
 * 2. Redistributions in binary form must reproduce the above copyright
14
 *    notice, this list of conditions and the following disclaimer in the
15
 *    documentation and/or other materials provided with the distribution.
16
 * 3. Neither the name of the University nor the names of its contributors
17
 *    may be used to endorse or promote products derived from this software
18
 *    without specific prior written permission.
19
 *
20
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30
 * SUCH DAMAGE.
31
 */
32
33
#include "rcv.h"
34
#include <errno.h>
35
#include <fcntl.h>
36
#include "extern.h"
37
38
/*
39
 * Mail -- a mail program
40
 *
41
 * Lexical processing of commands.
42
 */
43
44
char	*prompt = "& ";
45
46
const struct cmd *com;	/* command we are running */
47
48
/*
49
 * Set up editing on the given file name.
50
 * If the first character of name is %, we are considered to be
51
 * editing the file, otherwise we are reading our mail which has
52
 * signficance for mbox and so forth.
53
 */
54
int
55
setfile(char *name)
56
{
57
	FILE *ibuf;
58
	int i, fd;
59
	struct stat stb;
60
	char isedit = *name != '%';
61
	char *who = name[1] ? name + 1 : myname;
62
	char tempname[PATHSIZE];
63
	static int shudclob;
64
65
	if ((name = expand(name)) == NULL)
66
		return(-1);
67
68
	if ((ibuf = Fopen(name, "r")) == NULL) {
69
		if (!isedit && errno == ENOENT)
70
			goto nomail;
71
		warn("%s", name);
72
		return(-1);
73
	}
74
75
	if (fstat(fileno(ibuf), &stb) < 0) {
76
		warn("fstat");
77
		(void)Fclose(ibuf);
78
		return(-1);
79
	}
80
81
	switch (stb.st_mode & S_IFMT) {
82
	case S_IFDIR:
83
		(void)Fclose(ibuf);
84
		warnc(EISDIR, "%s", name);
85
		return(-1);
86
87
	case S_IFREG:
88
		break;
89
90
	default:
91
		(void)Fclose(ibuf);
92
		warnc(EINVAL, "%s", name);
93
		return(-1);
94
	}
95
96
	/*
97
	 * Looks like all will be well.  We must now relinquish our
98
	 * hold on the current set of stuff.  Must hold signals
99
	 * while we are reading the new file, else we will ruin
100
	 * the message[] data structure.
101
	 */
102
	holdsigs();
103
	if (shudclob)
104
		quit();
105
106
	/*
107
	 * Copy the messages into /tmp
108
	 * and set pointers.
109
	 */
110
	readonly = 0;
111
	if ((i = open(name, O_WRONLY, 0)) < 0)
112
		readonly++;
113
	else
114
		(void)close(i);
115
	if (shudclob) {
116
		(void)fclose(itf);
117
		(void)fclose(otf);
118
	}
119
	shudclob = 1;
120
	edit = isedit;
121
	strlcpy(prevfile, mailname, PATHSIZE);
122
	if (name != mailname)
123
		strlcpy(mailname, name, sizeof(mailname));
124
	mailsize = fsize(ibuf);
125
	(void)snprintf(tempname, sizeof(tempname),
126
	    "%s/mail.RxXXXXXXXXXX", tmpdir);
127
	if ((fd = mkostemp(tempname, O_CLOEXEC)) == -1 ||
128
	    (otf = fdopen(fd, "w")) == NULL)
129
		err(1, "%s", tempname);
130
	if ((itf = fopen(tempname, "re")) == NULL)
131
		err(1, "%s", tempname);
132
	(void)rm(tempname);
133
	setptr(ibuf, (off_t)0);
134
	setmsize(msgCount);
135
	/*
136
	 * New mail may have arrived while we were reading
137
	 * the mail file, so reset mailsize to be where
138
	 * we really are in the file...
139
	 */
140
	mailsize = ftell(ibuf);
141
	(void)Fclose(ibuf);
142
	relsesigs();
143
	sawcom = 0;
144
	if (!edit && msgCount == 0) {
145
nomail:
146
		fprintf(stderr, "No mail for %s\n", who);
147
		return(-1);
148
	}
149
	return(0);
150
}
151
152
/*
153
 * Incorporate any new mail that has arrived since we first
154
 * started reading mail.
155
 */
156
int
157
incfile(void)
158
{
159
	int newsize;
160
	int omsgCount = msgCount;
161
	FILE *ibuf;
162
163
	ibuf = Fopen(mailname, "r");
164
	if (ibuf == NULL)
165
		return(-1);
166
	holdsigs();
167
	if (!spool_lock()) {
168
		(void)Fclose(ibuf);
169
		relsesigs();
170
		return(-1);
171
	}
172
	newsize = fsize(ibuf);
173
	/* make sure mail box has grown and is non-empty */
174
	if (newsize == 0 || newsize <= mailsize) {
175
		(void)Fclose(ibuf);
176
		spool_unlock();
177
		relsesigs();
178
		return(newsize == mailsize ? 0 : -1);
179
	}
180
	setptr(ibuf, mailsize);
181
	setmsize(msgCount);
182
	mailsize = ftell(ibuf);
183
	(void)Fclose(ibuf);
184
	spool_unlock();
185
	relsesigs();
186
	return(msgCount - omsgCount);
187
}
188
189
190
int	*msgvec;
191
int	reset_on_stop;			/* reset prompt if stopped */
192
193
/*
194
 * Interpret user commands one by one.  If standard input is not a tty,
195
 * print no prompt.
196
 */
197
void
198
commands(void)
199
{
200
	int n, sig, *sigp;
201
	int eofloop = 0;
202
	char linebuf[LINESIZE];
203
204
	prompt:
205
	for (;;) {
206
		/*
207
		 * Print the prompt, if needed.  Clear out
208
		 * string space, and flush the output.
209
		 */
210
		if (!sourcing && value("interactive") != NULL) {
211
			if ((value("autoinc") != NULL) && (incfile() > 0))
212
				puts("New mail has arrived.");
213
			reset_on_stop = 1;
214
			printf("%s", prompt);
215
		}
216
		fflush(stdout);
217
		sreset();
218
		/*
219
		 * Read a line of commands from the current input
220
		 * and handle end of file specially.
221
		 */
222
		n = 0;
223
		sig = 0;
224
		sigp = sourcing ? NULL : &sig;
225
		for (;;) {
226
			if (readline(input, &linebuf[n], LINESIZE - n, sigp) < 0) {
227
				if (sig) {
228
					if (sig == SIGINT)
229
						dointr();
230
					else if (sig == SIGHUP)
231
						/* nothing to do? */
232
						exit(1);
233
					else {
234
						/* Stopped by job control */
235
						(void)kill(0, sig);
236
						if (reset_on_stop)
237
							reset_on_stop = 0;
238
					}
239
					goto prompt;
240
				}
241
				if (n == 0)
242
					n = -1;
243
				break;
244
			}
245
			if ((n = strlen(linebuf)) == 0)
246
				break;
247
			n--;
248
			if (linebuf[n] != '\\')
249
				break;
250
			linebuf[n++] = ' ';
251
		}
252
		reset_on_stop = 0;
253
		if (n < 0) {
254
				/* eof */
255
			if (loading)
256
				break;
257
			if (sourcing) {
258
				unstack();
259
				continue;
260
			}
261
			if (value("interactive") != NULL &&
262
			    value("ignoreeof") != NULL &&
263
			    ++eofloop < 25) {
264
				puts("Use \"quit\" to quit.");
265
				continue;
266
			}
267
			break;
268
		}
269
		eofloop = 0;
270
		if (execute(linebuf, 0))
271
			break;
272
	}
273
}
274
275
/*
276
 * Execute a single command.
277
 * Command functions return 0 for success, 1 for error, and -1
278
 * for abort.  A 1 or -1 aborts a load or source.  A -1 aborts
279
 * the interactive command loop.
280
 * Contxt is non-zero if called while composing mail.
281
 */
282
int
283
execute(char *linebuf, int contxt)
284
{
285
	char word[LINESIZE];
286
	char *arglist[MAXARGC];
287
	char *cp, *cp2;
288
	int c, muvec[2];
289
	int e = 1;
290
291
	com = NULL;
292
293
	/*
294
	 * Strip the white space away from the beginning
295
	 * of the command, then scan out a word, which
296
	 * consists of anything except digits and white space.
297
	 *
298
	 * Handle ! escapes differently to get the correct
299
	 * lexical conventions.
300
	 */
301
	for (cp = linebuf; isspace((unsigned char)*cp); cp++)
302
		;
303
	if (*cp == '!') {
304
		if (sourcing) {
305
			puts("Can't \"!\" while sourcing");
306
			goto out;
307
		}
308
		shell(cp+1);
309
		return(0);
310
	}
311
	cp2 = word;
312
	while (*cp &&
313
	        strchr(" \t0123456789$^.:/-+*'\"", (unsigned char)*cp) == NULL)
314
		*cp2++ = *cp++;
315
	*cp2 = '\0';
316
317
	/*
318
	 * Look up the command; if not found, bitch.
319
	 * Normally, a blank command would map to the
320
	 * first command in the table; while sourcing,
321
	 * however, we ignore blank lines to eliminate
322
	 * confusion.
323
	 */
324
	if (sourcing && *word == '\0')
325
		return(0);
326
	com = lex(word);
327
	if (com == NULL) {
328
		printf("Unknown command: \"%s\"\n", word);
329
		goto out;
330
	}
331
332
	/*
333
	 * See if we should execute the command -- if a conditional
334
	 * we always execute it, otherwise, check the state of cond.
335
	 */
336
	if ((com->c_argtype & F) == 0)
337
		if ((cond == CRCV && !rcvmode) || (cond == CSEND && rcvmode))
338
			return(0);
339
340
	/*
341
	 * Process the arguments to the command, depending
342
	 * on the type he expects.  Default to an error.
343
	 * If we are sourcing an interactive command, it's
344
	 * an error.
345
	 */
346
	if (!rcvmode && (com->c_argtype & M) == 0) {
347
		printf("May not execute \"%s\" while sending\n",
348
		    com->c_name);
349
		goto out;
350
	}
351
	if (sourcing && com->c_argtype & I) {
352
		printf("May not execute \"%s\" while sourcing\n",
353
		    com->c_name);
354
		goto out;
355
	}
356
	if (readonly && com->c_argtype & W) {
357
		printf("May not execute \"%s\" -- message file is read only\n",
358
		   com->c_name);
359
		goto out;
360
	}
361
	if (contxt && com->c_argtype & R) {
362
		printf("Cannot recursively invoke \"%s\"\n", com->c_name);
363
		goto out;
364
	}
365
	switch (com->c_argtype & ~(F|P|I|M|T|W|R)) {
366
	case MSGLIST|STRLIST:
367
		/*
368
		 * A message list defaulting to nearest forward
369
		 * legal message.
370
		 */
371
		if (msgvec == 0) {
372
			puts("Illegal use of \"message list\"");
373
			break;
374
		}
375
		/*
376
		 * remove leading blanks.
377
		 */
378
		while (isspace((unsigned char)*cp))
379
			cp++;
380
381
		if (isdigit((unsigned char)*cp) || *cp == ':') {
382
			if ((c = getmsglist(cp, msgvec, com->c_msgflag)) < 0)
383
				break;
384
			/* position to next space - past the message list */
385
			while (!isspace((unsigned char)*cp))
386
				cp++;
387
			/* position to next non-space */
388
			while (isspace((unsigned char)*cp))
389
				cp++;
390
		} else {
391
			c = 0; /* no message list */
392
		}
393
394
		if (c  == 0) {
395
			*msgvec = first(com->c_msgflag,
396
				com->c_msgmask);
397
			msgvec[1] = 0;
398
		}
399
		if (*msgvec == 0) {
400
			puts("No applicable messages");
401
			break;
402
		}
403
		/*
404
		 * Just the straight string, with
405
		 * leading blanks removed.
406
		 */
407
		while (isspace((unsigned char)*cp))
408
			cp++;
409
410
		e = (*com->c_func2)(msgvec, cp);
411
		break;
412
413
	case MSGLIST:
414
		/*
415
		 * A message list defaulting to nearest forward
416
		 * legal message.
417
		 */
418
		if (msgvec == NULL) {
419
			puts("Illegal use of \"message list\"");
420
			break;
421
		}
422
		if ((c = getmsglist(cp, msgvec, com->c_msgflag)) < 0)
423
			break;
424
		if (c  == 0) {
425
			*msgvec = first(com->c_msgflag,
426
				com->c_msgmask);
427
			msgvec[1] = 0;
428
		}
429
		if (*msgvec == 0) {
430
			puts("No applicable messages");
431
			break;
432
		}
433
		e = (*com->c_func)(msgvec);
434
		break;
435
436
	case NDMLIST:
437
		/*
438
		 * A message list with no defaults, but no error
439
		 * if none exist.
440
		 */
441
		if (msgvec == 0) {
442
			puts("Illegal use of \"message list\"");
443
			break;
444
		}
445
		if (getmsglist(cp, msgvec, com->c_msgflag) < 0)
446
			break;
447
		e = (*com->c_func)(msgvec);
448
		break;
449
450
	case STRLIST:
451
		/*
452
		 * Just the straight string, with
453
		 * leading blanks removed.
454
		 */
455
		while (isspace((unsigned char)*cp))
456
			cp++;
457
		e = (*com->c_func)(cp);
458
		break;
459
460
	case RAWLIST:
461
		/*
462
		 * A vector of strings, in shell style.
463
		 */
464
		if ((c = getrawlist(cp, arglist,
465
				sizeof(arglist) / sizeof(*arglist))) < 0)
466
			break;
467
		if (c < com->c_minargs) {
468
			printf("%s requires at least %d arg(s)\n",
469
				com->c_name, com->c_minargs);
470
			break;
471
		}
472
		if (c > com->c_maxargs) {
473
			printf("%s takes no more than %d arg(s)\n",
474
				com->c_name, com->c_maxargs);
475
			break;
476
		}
477
		e = (*com->c_func)(arglist);
478
		break;
479
480
	case NOLIST:
481
		/*
482
		 * Just the constant zero, for exiting,
483
		 * eg.
484
		 */
485
		e = (*com->c_func)(0);
486
		break;
487
488
	default:
489
		errx(1, "Unknown argtype");
490
	}
491
492
out:
493
	/*
494
	 * Exit the current source file on
495
	 * error.
496
	 */
497
	if (e) {
498
		if (e < 0)
499
			return(1);
500
		if (loading)
501
			return(1);
502
		if (sourcing)
503
			unstack();
504
		return(0);
505
	}
506
	if (com == NULL)
507
		return(0);
508
	if (value("autoprint") != NULL && com->c_argtype & P)
509
		if ((dot->m_flag & MDELETED) == 0) {
510
			muvec[0] = dot - &message[0] + 1;
511
			muvec[1] = 0;
512
			type(muvec);
513
		}
514
	if (!sourcing && (com->c_argtype & T) == 0)
515
		sawcom = 1;
516
	return(0);
517
}
518
519
/*
520
 * Set the size of the message vector used to construct argument
521
 * lists to message list functions.
522
 */
523
void
524
setmsize(int n)
525
{
526
	int *msgvec2;
527
	size_t msize;
528
529
	msize = (n + 1) * sizeof(*msgvec);
530
	if ((msgvec2 = realloc(msgvec, msize)) == NULL)
531
		err(1, "realloc");
532
	msgvec = msgvec2;
533
	memset(msgvec, 0, msize);
534
}
535
536
/*
537
 * Find the correct command in the command table corresponding
538
 * to the passed command "word"
539
 */
540
541
const struct cmd *
542
lex(char *word)
543
{
544
	extern const struct cmd cmdtab[];
545
	const struct cmd *cp;
546
547
	if (word[0] == '#')
548
		word = "#";
549
	for (cp = &cmdtab[0]; cp->c_name != NULL; cp++)
550
		if (isprefix(word, cp->c_name))
551
			return(cp);
552
	return(NULL);
553
}
554
555
/*
556
 * Determine if as1 is a valid prefix of as2.
557
 * Return true if yep.
558
 */
559
int
560
isprefix(char *as1, char *as2)
561
{
562
	char *s1, *s2;
563
564
	s1 = as1;
565
	s2 = as2;
566
	while (*s1++ == *s2)
567
		if (*s2++ == '\0')
568
			return(1);
569
	return(*--s1 == '\0');
570
}
571
572
/*
573
 * The following gets called on receipt of an interrupt.  This is
574
 * to abort printout of a command, mainly.
575
 * Dispatching here when command() is inactive crashes rcv.
576
 * Close all open files except 0, 1, 2, and the temporary.
577
 * Also, unstack all source files.
578
 */
579
int	inithdr;			/* am printing startup headers */
580
581
void
582
dointr(void)
583
{
584
585
	noreset = 0;
586
	if (!inithdr)
587
		sawcom++;
588
	inithdr = 0;
589
	while (sourcing)
590
		unstack();
591
592
	close_all_files();
593
594
	if (image >= 0) {
595
		(void)close(image);
596
		image = -1;
597
	}
598
	fputs("Interrupt\n", stderr);
599
}
600
601
/*
602
 * Announce the presence of the current Mail version,
603
 * give the message count, and print a header listing.
604
 */
605
void
606
announce(void)
607
{
608
	int vec[2], mdot;
609
610
	mdot = newfileinfo(0);
611
	vec[0] = mdot;
612
	vec[1] = 0;
613
	dot = &message[mdot - 1];
614
	if (msgCount > 0 && value("noheader") == NULL) {
615
		inithdr++;
616
		headers(vec);
617
		inithdr = 0;
618
	}
619
}
620
621
/*
622
 * Announce information about the file we are editing.
623
 * Return a likely place to set dot.
624
 */
625
int
626
newfileinfo(int omsgCount)
627
{
628
	struct message *mp;
629
	int u, n, mdot, d, s;
630
	char fname[PATHSIZE], zname[PATHSIZE], *ename;
631
632
	for (mp = &message[omsgCount]; mp < &message[msgCount]; mp++)
633
		if (mp->m_flag & MNEW)
634
			break;
635
	if (mp >= &message[msgCount])
636
		for (mp = &message[omsgCount]; mp < &message[msgCount]; mp++)
637
			if ((mp->m_flag & MREAD) == 0)
638
				break;
639
	if (mp < &message[msgCount])
640
		mdot = mp - &message[0] + 1;
641
	else
642
		mdot = omsgCount + 1;
643
	s = d = 0;
644
	for (mp = &message[0], n = 0, u = 0; mp < &message[msgCount]; mp++) {
645
		if (mp->m_flag & MNEW)
646
			n++;
647
		if ((mp->m_flag & MREAD) == 0)
648
			u++;
649
		if (mp->m_flag & MDELETED)
650
			d++;
651
		if (mp->m_flag & MSAVED)
652
			s++;
653
	}
654
	ename = mailname;
655
	if (getfold(fname, sizeof(fname)) >= 0) {
656
		strlcat(fname, "/", sizeof(fname));
657
		if (strncmp(fname, mailname, strlen(fname)) == 0) {
658
			(void)snprintf(zname, sizeof(zname), "+%s",
659
			    mailname + strlen(fname));
660
			ename = zname;
661
		}
662
	}
663
	printf("\"%s\": ", ename);
664
	if (msgCount == 1)
665
		fputs("1 message", stdout);
666
	else
667
		printf("%d messages", msgCount);
668
	if (n > 0)
669
		printf(" %d new", n);
670
	if (u-n > 0)
671
		printf(" %d unread", u);
672
	if (d > 0)
673
		printf(" %d deleted", d);
674
	if (s > 0)
675
		printf(" %d saved", s);
676
	if (readonly)
677
		fputs(" [Read only]", stdout);
678
	putchar('\n');
679
	return(mdot);
680
}
681
682
/*
683
 * Print the current version number.
684
 */
685
/*ARGSUSED*/
686
int
687
pversion(void *v)
688
{
689
	extern const char version[];
690
691
	printf("Version %s\n", version);
692
	return(0);
693
}
694
695
/*
696
 * Load a file of user definitions.
697
 */
698
void
699
load(char *name)
700
{
701
	FILE *in, *oldin;
702
703
	if ((in = Fopen(name, "r")) == NULL)
704
		return;
705
	oldin = input;
706
	input = in;
707
	loading = 1;
708
	sourcing = 1;
709
	commands();
710
	loading = 0;
711
	sourcing = 0;
712
	input = oldin;
713
	(void)Fclose(in);
714
}