Commit | Line | Data |
---|---|---|
4f4122db WJ |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
3 | * 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 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | */ | |
33 | ||
34 | #ifndef lint | |
35 | static char sccsid[] = "@(#)lex.c 5.23 (Berkeley) 4/1/91"; | |
36 | #endif /* not lint */ | |
37 | ||
38 | #include "rcv.h" | |
39 | #include <sys/stat.h> | |
40 | #include <errno.h> | |
41 | ||
42 | /* | |
43 | * Mail -- a mail program | |
44 | * | |
45 | * Lexical processing of commands. | |
46 | */ | |
47 | ||
48 | char *prompt = "& "; | |
49 | ||
50 | /* | |
51 | * Set up editing on the given file name. | |
52 | * If the first character of name is %, we are considered to be | |
53 | * editing the file, otherwise we are reading our mail which has | |
54 | * signficance for mbox and so forth. | |
55 | */ | |
56 | setfile(name) | |
57 | char *name; | |
58 | { | |
59 | FILE *ibuf; | |
60 | int i; | |
61 | struct stat stb; | |
62 | char isedit = *name != '%'; | |
63 | char *who = name[1] ? name + 1 : myname; | |
64 | static int shudclob; | |
65 | extern char tempMesg[]; | |
66 | extern int errno; | |
67 | ||
68 | if ((name = expand(name)) == NOSTR) | |
69 | return -1; | |
70 | ||
71 | if ((ibuf = Fopen(name, "r")) == NULL) { | |
72 | if (!isedit && errno == ENOENT) | |
73 | goto nomail; | |
74 | perror(name); | |
75 | return(-1); | |
76 | } | |
77 | ||
78 | if (fstat(fileno(ibuf), &stb) < 0) { | |
79 | perror("fstat"); | |
80 | Fclose(ibuf); | |
81 | return (-1); | |
82 | } | |
83 | ||
84 | switch (stb.st_mode & S_IFMT) { | |
85 | case S_IFDIR: | |
86 | Fclose(ibuf); | |
87 | errno = EISDIR; | |
88 | perror(name); | |
89 | return (-1); | |
90 | ||
91 | case S_IFREG: | |
92 | break; | |
93 | ||
94 | default: | |
95 | Fclose(ibuf); | |
96 | errno = EINVAL; | |
97 | perror(name); | |
98 | return (-1); | |
99 | } | |
100 | ||
101 | /* | |
102 | * Looks like all will be well. We must now relinquish our | |
103 | * hold on the current set of stuff. Must hold signals | |
104 | * while we are reading the new file, else we will ruin | |
105 | * the message[] data structure. | |
106 | */ | |
107 | ||
108 | holdsigs(); | |
109 | if (shudclob) | |
110 | quit(); | |
111 | ||
112 | /* | |
113 | * Copy the messages into /tmp | |
114 | * and set pointers. | |
115 | */ | |
116 | ||
117 | readonly = 0; | |
118 | if ((i = open(name, 1)) < 0) | |
119 | readonly++; | |
120 | else | |
121 | close(i); | |
122 | if (shudclob) { | |
123 | fclose(itf); | |
124 | fclose(otf); | |
125 | } | |
126 | shudclob = 1; | |
127 | edit = isedit; | |
128 | strcpy(prevfile, mailname); | |
129 | if (name != mailname) | |
130 | strcpy(mailname, name); | |
131 | mailsize = fsize(ibuf); | |
132 | if ((otf = fopen(tempMesg, "w")) == NULL) { | |
133 | perror(tempMesg); | |
134 | exit(1); | |
135 | } | |
136 | if ((itf = fopen(tempMesg, "r")) == NULL) { | |
137 | perror(tempMesg); | |
138 | exit(1); | |
139 | } | |
140 | rm(tempMesg); | |
141 | setptr(ibuf); | |
142 | setmsize(msgCount); | |
143 | Fclose(ibuf); | |
144 | relsesigs(); | |
145 | sawcom = 0; | |
146 | if (!edit && msgCount == 0) { | |
147 | nomail: | |
148 | fprintf(stderr, "No mail for %s\n", who); | |
149 | return -1; | |
150 | } | |
151 | return(0); | |
152 | } | |
153 | ||
154 | int *msgvec; | |
155 | int reset_on_stop; /* do a reset() if stopped */ | |
156 | ||
157 | /* | |
158 | * Interpret user commands one by one. If standard input is not a tty, | |
159 | * print no prompt. | |
160 | */ | |
161 | commands() | |
162 | { | |
163 | int eofloop = 0; | |
164 | register int n; | |
165 | char linebuf[LINESIZE]; | |
166 | void intr(), stop(), hangup(); | |
167 | ||
168 | if (!sourcing) { | |
169 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) | |
170 | signal(SIGINT, intr); | |
171 | if (signal(SIGHUP, SIG_IGN) != SIG_IGN) | |
172 | signal(SIGHUP, hangup); | |
173 | signal(SIGTSTP, stop); | |
174 | signal(SIGTTOU, stop); | |
175 | signal(SIGTTIN, stop); | |
176 | } | |
177 | setexit(); | |
178 | for (;;) { | |
179 | /* | |
180 | * Print the prompt, if needed. Clear out | |
181 | * string space, and flush the output. | |
182 | */ | |
183 | if (!sourcing && value("interactive") != NOSTR) { | |
184 | reset_on_stop = 1; | |
185 | printf(prompt); | |
186 | } | |
187 | fflush(stdout); | |
188 | sreset(); | |
189 | /* | |
190 | * Read a line of commands from the current input | |
191 | * and handle end of file specially. | |
192 | */ | |
193 | n = 0; | |
194 | for (;;) { | |
195 | if (readline(input, &linebuf[n], LINESIZE - n) < 0) { | |
196 | if (n == 0) | |
197 | n = -1; | |
198 | break; | |
199 | } | |
200 | if ((n = strlen(linebuf)) == 0) | |
201 | break; | |
202 | n--; | |
203 | if (linebuf[n] != '\\') | |
204 | break; | |
205 | linebuf[n++] = ' '; | |
206 | } | |
207 | reset_on_stop = 0; | |
208 | if (n < 0) { | |
209 | /* eof */ | |
210 | if (loading) | |
211 | break; | |
212 | if (sourcing) { | |
213 | unstack(); | |
214 | continue; | |
215 | } | |
216 | if (value("interactive") != NOSTR && | |
217 | value("ignoreeof") != NOSTR && | |
218 | ++eofloop < 25) { | |
219 | printf("Use \"quit\" to quit.\n"); | |
220 | continue; | |
221 | } | |
222 | break; | |
223 | } | |
224 | eofloop = 0; | |
225 | if (execute(linebuf, 0)) | |
226 | break; | |
227 | } | |
228 | } | |
229 | ||
230 | /* | |
231 | * Execute a single command. | |
232 | * Command functions return 0 for success, 1 for error, and -1 | |
233 | * for abort. A 1 or -1 aborts a load or source. A -1 aborts | |
234 | * the interactive command loop. | |
235 | * Contxt is non-zero if called while composing mail. | |
236 | */ | |
237 | execute(linebuf, contxt) | |
238 | char linebuf[]; | |
239 | { | |
240 | char word[LINESIZE]; | |
241 | char *arglist[MAXARGC]; | |
242 | struct cmd *com; | |
243 | register char *cp, *cp2; | |
244 | register int c; | |
245 | int muvec[2]; | |
246 | int e = 1; | |
247 | ||
248 | /* | |
249 | * Strip the white space away from the beginning | |
250 | * of the command, then scan out a word, which | |
251 | * consists of anything except digits and white space. | |
252 | * | |
253 | * Handle ! escapes differently to get the correct | |
254 | * lexical conventions. | |
255 | */ | |
256 | ||
257 | for (cp = linebuf; isspace(*cp); cp++) | |
258 | ; | |
259 | if (*cp == '!') { | |
260 | if (sourcing) { | |
261 | printf("Can't \"!\" while sourcing\n"); | |
262 | goto out; | |
263 | } | |
264 | shell(cp+1); | |
265 | return(0); | |
266 | } | |
267 | cp2 = word; | |
268 | while (*cp && index(" \t0123456789$^.:/-+*'\"", *cp) == NOSTR) | |
269 | *cp2++ = *cp++; | |
270 | *cp2 = '\0'; | |
271 | ||
272 | /* | |
273 | * Look up the command; if not found, bitch. | |
274 | * Normally, a blank command would map to the | |
275 | * first command in the table; while sourcing, | |
276 | * however, we ignore blank lines to eliminate | |
277 | * confusion. | |
278 | */ | |
279 | ||
280 | if (sourcing && *word == '\0') | |
281 | return(0); | |
282 | com = lex(word); | |
283 | if (com == NONE) { | |
284 | printf("Unknown command: \"%s\"\n", word); | |
285 | goto out; | |
286 | } | |
287 | ||
288 | /* | |
289 | * See if we should execute the command -- if a conditional | |
290 | * we always execute it, otherwise, check the state of cond. | |
291 | */ | |
292 | ||
293 | if ((com->c_argtype & F) == 0) | |
294 | if (cond == CRCV && !rcvmode || cond == CSEND && rcvmode) | |
295 | return(0); | |
296 | ||
297 | /* | |
298 | * Process the arguments to the command, depending | |
299 | * on the type he expects. Default to an error. | |
300 | * If we are sourcing an interactive command, it's | |
301 | * an error. | |
302 | */ | |
303 | ||
304 | if (!rcvmode && (com->c_argtype & M) == 0) { | |
305 | printf("May not execute \"%s\" while sending\n", | |
306 | com->c_name); | |
307 | goto out; | |
308 | } | |
309 | if (sourcing && com->c_argtype & I) { | |
310 | printf("May not execute \"%s\" while sourcing\n", | |
311 | com->c_name); | |
312 | goto out; | |
313 | } | |
314 | if (readonly && com->c_argtype & W) { | |
315 | printf("May not execute \"%s\" -- message file is read only\n", | |
316 | com->c_name); | |
317 | goto out; | |
318 | } | |
319 | if (contxt && com->c_argtype & R) { | |
320 | printf("Cannot recursively invoke \"%s\"\n", com->c_name); | |
321 | goto out; | |
322 | } | |
323 | switch (com->c_argtype & ~(F|P|I|M|T|W|R)) { | |
324 | case MSGLIST: | |
325 | /* | |
326 | * A message list defaulting to nearest forward | |
327 | * legal message. | |
328 | */ | |
329 | if (msgvec == 0) { | |
330 | printf("Illegal use of \"message list\"\n"); | |
331 | break; | |
332 | } | |
333 | if ((c = getmsglist(cp, msgvec, com->c_msgflag)) < 0) | |
334 | break; | |
335 | if (c == 0) { | |
336 | *msgvec = first(com->c_msgflag, | |
337 | com->c_msgmask); | |
338 | msgvec[1] = NULL; | |
339 | } | |
340 | if (*msgvec == NULL) { | |
341 | printf("No applicable messages\n"); | |
342 | break; | |
343 | } | |
344 | e = (*com->c_func)(msgvec); | |
345 | break; | |
346 | ||
347 | case NDMLIST: | |
348 | /* | |
349 | * A message list with no defaults, but no error | |
350 | * if none exist. | |
351 | */ | |
352 | if (msgvec == 0) { | |
353 | printf("Illegal use of \"message list\"\n"); | |
354 | break; | |
355 | } | |
356 | if (getmsglist(cp, msgvec, com->c_msgflag) < 0) | |
357 | break; | |
358 | e = (*com->c_func)(msgvec); | |
359 | break; | |
360 | ||
361 | case STRLIST: | |
362 | /* | |
363 | * Just the straight string, with | |
364 | * leading blanks removed. | |
365 | */ | |
366 | while (isspace(*cp)) | |
367 | cp++; | |
368 | e = (*com->c_func)(cp); | |
369 | break; | |
370 | ||
371 | case RAWLIST: | |
372 | /* | |
373 | * A vector of strings, in shell style. | |
374 | */ | |
375 | if ((c = getrawlist(cp, arglist, | |
376 | sizeof arglist / sizeof *arglist)) < 0) | |
377 | break; | |
378 | if (c < com->c_minargs) { | |
379 | printf("%s requires at least %d arg(s)\n", | |
380 | com->c_name, com->c_minargs); | |
381 | break; | |
382 | } | |
383 | if (c > com->c_maxargs) { | |
384 | printf("%s takes no more than %d arg(s)\n", | |
385 | com->c_name, com->c_maxargs); | |
386 | break; | |
387 | } | |
388 | e = (*com->c_func)(arglist); | |
389 | break; | |
390 | ||
391 | case NOLIST: | |
392 | /* | |
393 | * Just the constant zero, for exiting, | |
394 | * eg. | |
395 | */ | |
396 | e = (*com->c_func)(0); | |
397 | break; | |
398 | ||
399 | default: | |
400 | panic("Unknown argtype"); | |
401 | } | |
402 | ||
403 | out: | |
404 | /* | |
405 | * Exit the current source file on | |
406 | * error. | |
407 | */ | |
408 | if (e) { | |
409 | if (e < 0) | |
410 | return 1; | |
411 | if (loading) | |
412 | return 1; | |
413 | if (sourcing) | |
414 | unstack(); | |
415 | return 0; | |
416 | } | |
417 | if (value("autoprint") != NOSTR && com->c_argtype & P) | |
418 | if ((dot->m_flag & MDELETED) == 0) { | |
419 | muvec[0] = dot - &message[0] + 1; | |
420 | muvec[1] = 0; | |
421 | type(muvec); | |
422 | } | |
423 | if (!sourcing && (com->c_argtype & T) == 0) | |
424 | sawcom = 1; | |
425 | return(0); | |
426 | } | |
427 | ||
428 | /* | |
429 | * Set the size of the message vector used to construct argument | |
430 | * lists to message list functions. | |
431 | */ | |
432 | ||
433 | setmsize(sz) | |
434 | { | |
435 | ||
436 | if (msgvec != 0) | |
437 | cfree((char *) msgvec); | |
438 | msgvec = (int *) calloc((unsigned) (sz + 1), sizeof *msgvec); | |
439 | } | |
440 | ||
441 | /* | |
442 | * Find the correct command in the command table corresponding | |
443 | * to the passed command "word" | |
444 | */ | |
445 | ||
446 | struct cmd * | |
447 | lex(word) | |
448 | char word[]; | |
449 | { | |
450 | register struct cmd *cp; | |
451 | extern struct cmd cmdtab[]; | |
452 | ||
453 | for (cp = &cmdtab[0]; cp->c_name != NOSTR; cp++) | |
454 | if (isprefix(word, cp->c_name)) | |
455 | return(cp); | |
456 | return(NONE); | |
457 | } | |
458 | ||
459 | /* | |
460 | * Determine if as1 is a valid prefix of as2. | |
461 | * Return true if yep. | |
462 | */ | |
463 | ||
464 | isprefix(as1, as2) | |
465 | char *as1, *as2; | |
466 | { | |
467 | register char *s1, *s2; | |
468 | ||
469 | s1 = as1; | |
470 | s2 = as2; | |
471 | while (*s1++ == *s2) | |
472 | if (*s2++ == '\0') | |
473 | return(1); | |
474 | return(*--s1 == '\0'); | |
475 | } | |
476 | ||
477 | /* | |
478 | * The following gets called on receipt of an interrupt. This is | |
479 | * to abort printout of a command, mainly. | |
480 | * Dispatching here when command() is inactive crashes rcv. | |
481 | * Close all open files except 0, 1, 2, and the temporary. | |
482 | * Also, unstack all source files. | |
483 | */ | |
484 | ||
485 | int inithdr; /* am printing startup headers */ | |
486 | ||
487 | /*ARGSUSED*/ | |
488 | void | |
489 | intr(s) | |
490 | { | |
491 | ||
492 | noreset = 0; | |
493 | if (!inithdr) | |
494 | sawcom++; | |
495 | inithdr = 0; | |
496 | while (sourcing) | |
497 | unstack(); | |
498 | ||
499 | close_all_files(); | |
500 | ||
501 | if (image >= 0) { | |
502 | close(image); | |
503 | image = -1; | |
504 | } | |
505 | fprintf(stderr, "Interrupt\n"); | |
506 | reset(0); | |
507 | } | |
508 | ||
509 | /* | |
510 | * When we wake up after ^Z, reprint the prompt. | |
511 | */ | |
512 | void | |
513 | stop(s) | |
514 | { | |
515 | sig_t old_action = signal(s, SIG_DFL); | |
516 | ||
517 | sigsetmask(sigblock(0) & ~sigmask(s)); | |
518 | kill(0, s); | |
519 | sigblock(sigmask(s)); | |
520 | signal(s, old_action); | |
521 | if (reset_on_stop) { | |
522 | reset_on_stop = 0; | |
523 | reset(0); | |
524 | } | |
525 | } | |
526 | ||
527 | /* | |
528 | * Branch here on hangup signal and simulate "exit". | |
529 | */ | |
530 | /*ARGSUSED*/ | |
531 | void | |
532 | hangup(s) | |
533 | { | |
534 | ||
535 | /* nothing to do? */ | |
536 | exit(1); | |
537 | } | |
538 | ||
539 | /* | |
540 | * Announce the presence of the current Mail version, | |
541 | * give the message count, and print a header listing. | |
542 | */ | |
543 | ||
544 | announce() | |
545 | { | |
546 | int vec[2], mdot; | |
547 | ||
548 | mdot = newfileinfo(); | |
549 | vec[0] = mdot; | |
550 | vec[1] = 0; | |
551 | dot = &message[mdot - 1]; | |
552 | if (msgCount > 0 && value("noheader") == NOSTR) { | |
553 | inithdr++; | |
554 | headers(vec); | |
555 | inithdr = 0; | |
556 | } | |
557 | } | |
558 | ||
559 | /* | |
560 | * Announce information about the file we are editing. | |
561 | * Return a likely place to set dot. | |
562 | */ | |
563 | newfileinfo() | |
564 | { | |
565 | register struct message *mp; | |
566 | register int u, n, mdot, d, s; | |
567 | char fname[BUFSIZ], zname[BUFSIZ], *ename; | |
568 | ||
569 | for (mp = &message[0]; mp < &message[msgCount]; mp++) | |
570 | if (mp->m_flag & MNEW) | |
571 | break; | |
572 | if (mp >= &message[msgCount]) | |
573 | for (mp = &message[0]; mp < &message[msgCount]; mp++) | |
574 | if ((mp->m_flag & MREAD) == 0) | |
575 | break; | |
576 | if (mp < &message[msgCount]) | |
577 | mdot = mp - &message[0] + 1; | |
578 | else | |
579 | mdot = 1; | |
580 | s = d = 0; | |
581 | for (mp = &message[0], n = 0, u = 0; mp < &message[msgCount]; mp++) { | |
582 | if (mp->m_flag & MNEW) | |
583 | n++; | |
584 | if ((mp->m_flag & MREAD) == 0) | |
585 | u++; | |
586 | if (mp->m_flag & MDELETED) | |
587 | d++; | |
588 | if (mp->m_flag & MSAVED) | |
589 | s++; | |
590 | } | |
591 | ename = mailname; | |
592 | if (getfold(fname) >= 0) { | |
593 | strcat(fname, "/"); | |
594 | if (strncmp(fname, mailname, strlen(fname)) == 0) { | |
595 | sprintf(zname, "+%s", mailname + strlen(fname)); | |
596 | ename = zname; | |
597 | } | |
598 | } | |
599 | printf("\"%s\": ", ename); | |
600 | if (msgCount == 1) | |
601 | printf("1 message"); | |
602 | else | |
603 | printf("%d messages", msgCount); | |
604 | if (n > 0) | |
605 | printf(" %d new", n); | |
606 | if (u-n > 0) | |
607 | printf(" %d unread", u); | |
608 | if (d > 0) | |
609 | printf(" %d deleted", d); | |
610 | if (s > 0) | |
611 | printf(" %d saved", s); | |
612 | if (readonly) | |
613 | printf(" [Read only]"); | |
614 | printf("\n"); | |
615 | return(mdot); | |
616 | } | |
617 | ||
618 | /* | |
619 | * Print the current version number. | |
620 | */ | |
621 | ||
622 | /*ARGSUSED*/ | |
623 | pversion(e) | |
624 | { | |
625 | extern char *version; | |
626 | ||
627 | printf("Version %s\n", version); | |
628 | return(0); | |
629 | } | |
630 | ||
631 | /* | |
632 | * Load a file of user definitions. | |
633 | */ | |
634 | load(name) | |
635 | char *name; | |
636 | { | |
637 | register FILE *in, *oldin; | |
638 | ||
639 | if ((in = Fopen(name, "r")) == NULL) | |
640 | return; | |
641 | oldin = input; | |
642 | input = in; | |
643 | loading = 1; | |
644 | sourcing = 1; | |
645 | commands(); | |
646 | loading = 0; | |
647 | sourcing = 0; | |
648 | input = oldin; | |
649 | Fclose(in); | |
650 | } |