Commit | Line | Data |
---|---|---|
ac72cd41 KS |
1 | # |
2 | ||
3 | #include "rcv.h" | |
4 | ||
5 | /* | |
6 | * Mail -- a mail program | |
7 | * | |
8 | * Lexical processing of commands. | |
9 | */ | |
10 | ||
853e9d55 | 11 | static char *SccsId = "@(#)lex.c 2.3 %G%"; |
e5717bff KS |
12 | |
13 | /* | |
14 | * Set up editing on the given file name. | |
15 | * If isedit is true, we are considered to be editing the file, | |
16 | * otherwise we are reading our mail which has signficance for | |
17 | * mbox and so forth. | |
18 | */ | |
19 | ||
20 | setfile(name, isedit) | |
21 | char *name; | |
22 | { | |
23 | FILE *ibuf; | |
24 | int i; | |
25 | static int shudclob; | |
26 | static char efile[128]; | |
27 | extern char tempMesg[]; | |
e5717bff KS |
28 | |
29 | if ((ibuf = fopen(name, "r")) == NULL) { | |
30 | if (isedit) | |
31 | perror(name); | |
32 | else | |
33 | printf("No mail for %s\n", myname); | |
34 | return(-1); | |
35 | } | |
36 | ||
37 | /* | |
38 | * Looks like all will be well. We must now relinquish our | |
177b7a73 | 39 | * hold on the current set of stuff. Must hold signals |
e5717bff KS |
40 | * while we are reading the new file, else we will ruin |
41 | * the message[] data structure. | |
42 | */ | |
43 | ||
177b7a73 | 44 | holdsigs(); |
e5717bff KS |
45 | if (shudclob) { |
46 | if (edit) | |
47 | edstop(); | |
48 | else | |
49 | quit(); | |
50 | } | |
51 | ||
52 | /* | |
53 | * Copy the messages into /tmp | |
54 | * and set pointers. | |
55 | */ | |
56 | ||
57 | readonly = 0; | |
58 | if ((i = open(name, 1)) < 0) | |
59 | readonly++; | |
60 | else | |
61 | close(i); | |
62 | if (shudclob) { | |
63 | fclose(itf); | |
64 | fclose(otf); | |
65 | } | |
66 | shudclob = 1; | |
67 | edit = isedit; | |
68 | strncpy(efile, name, 128); | |
69 | editfile = efile; | |
128ec005 KS |
70 | if (name != mailname) |
71 | strcpy(mailname, name); | |
e5717bff KS |
72 | mailsize = fsize(ibuf); |
73 | if ((otf = fopen(tempMesg, "w")) == NULL) { | |
74 | perror(tempMesg); | |
75 | exit(1); | |
76 | } | |
77 | if ((itf = fopen(tempMesg, "r")) == NULL) { | |
78 | perror(tempMesg); | |
79 | exit(1); | |
80 | } | |
81 | remove(tempMesg); | |
82 | setptr(ibuf); | |
83 | setmsize(msgCount); | |
84 | fclose(ibuf); | |
177b7a73 | 85 | relsesigs(); |
4d931f76 | 86 | shudann = 1; |
335704ca | 87 | sawcom = 0; |
e5717bff KS |
88 | return(0); |
89 | } | |
ac72cd41 KS |
90 | |
91 | /* | |
92 | * Interpret user commands one by one. If standard input is not a tty, | |
93 | * print no prompt. | |
94 | */ | |
95 | ||
96 | int *msgvec; | |
97 | ||
98 | commands() | |
99 | { | |
853e9d55 | 100 | int eofloop, prompt, firstsw, stop(); |
ac72cd41 KS |
101 | register int n; |
102 | char linebuf[LINESIZE]; | |
de274ec3 | 103 | int hangup(), contin(); |
ac72cd41 | 104 | |
de274ec3 KS |
105 | sigset(SIGCONT, contin); |
106 | sighold(SIGCONT); | |
726c3356 KS |
107 | if (rcvmode) { |
108 | if (sigset(SIGINT, SIG_IGN) != SIG_IGN) | |
109 | sigset(SIGINT, stop); | |
110 | if (sigset(SIGHUP, SIG_IGN) != SIG_IGN) | |
111 | sigset(SIGHUP, hangup); | |
112 | } | |
ac72cd41 KS |
113 | input = stdin; |
114 | prompt = 1; | |
115 | if (!intty) | |
116 | prompt = 0; | |
117 | firstsw = 1; | |
118 | for (;;) { | |
119 | setexit(); | |
120 | if (firstsw > 0) { | |
121 | firstsw = 0; | |
122 | source1(mailrc); | |
123 | if (!nosrc) | |
124 | source1(MASTER); | |
125 | } | |
126 | ||
127 | /* | |
128 | * How's this for obscure: after we | |
129 | * finish sourcing for the first time, | |
130 | * go off and print the headers! | |
131 | */ | |
132 | ||
4d931f76 KS |
133 | if (shudann && !sourcing) { |
134 | shudann = 0; | |
ac72cd41 | 135 | if (rcvmode) |
4d931f76 | 136 | announce(edit); |
ac72cd41 KS |
137 | } |
138 | ||
139 | /* | |
140 | * Print the prompt, if needed. Clear out | |
141 | * string space, and flush the output. | |
142 | */ | |
143 | ||
144 | if (!rcvmode && !sourcing) | |
145 | return; | |
853e9d55 | 146 | eofloop = 0; |
73f94fab | 147 | top: |
de274ec3 KS |
148 | if (prompt && !sourcing) { |
149 | sigrelse(SIGCONT); | |
ac72cd41 | 150 | printf("_\r"); |
de274ec3 | 151 | } |
ac72cd41 KS |
152 | flush(); |
153 | sreset(); | |
154 | ||
155 | /* | |
156 | * Read a line of commands from the current input | |
157 | * and handle end of file specially. | |
158 | */ | |
159 | ||
160 | n = 0; | |
161 | for (;;) { | |
162 | if (readline(input, &linebuf[n]) <= 0) { | |
163 | if (n != 0) | |
164 | break; | |
165 | if (sourcing) { | |
166 | unstack(); | |
167 | goto more; | |
168 | } | |
73f94fab | 169 | if (value("ignoreeof") != NOSTR && prompt) { |
853e9d55 KS |
170 | if (++eofloop < 25) { |
171 | printf("Use \"quit\" to quit.\n"); | |
172 | goto top; | |
173 | } | |
73f94fab | 174 | } |
726c3356 | 175 | if (!edit) |
ac72cd41 | 176 | return; |
ac72cd41 KS |
177 | edstop(); |
178 | return; | |
179 | } | |
180 | if ((n = strlen(linebuf)) == 0) | |
181 | break; | |
182 | n--; | |
183 | if (linebuf[n] != '\\') | |
184 | break; | |
185 | linebuf[n++] = ' '; | |
186 | } | |
de274ec3 | 187 | sighold(SIGCONT); |
2cd8e0a9 | 188 | if (execute(linebuf, 0)) |
ac72cd41 KS |
189 | return; |
190 | more: ; | |
191 | } | |
192 | } | |
193 | ||
194 | /* | |
195 | * Execute a single command. If the command executed | |
196 | * is "quit," then return non-zero so that the caller | |
197 | * will know to return back to main, if he cares. | |
2cd8e0a9 | 198 | * Contxt is non-zero if called while composing mail. |
ac72cd41 KS |
199 | */ |
200 | ||
2cd8e0a9 | 201 | execute(linebuf, contxt) |
ac72cd41 KS |
202 | char linebuf[]; |
203 | { | |
204 | char word[LINESIZE]; | |
205 | char *arglist[MAXARGC]; | |
206 | struct cmd *com; | |
207 | register char *cp, *cp2; | |
208 | register int c; | |
e5717bff | 209 | int muvec[2]; |
ac72cd41 KS |
210 | int edstop(), e; |
211 | ||
212 | /* | |
213 | * Strip the white space away from the beginning | |
214 | * of the command, then scan out a word, which | |
215 | * consists of anything except digits and white space. | |
216 | * | |
217 | * Handle ! escapes differently to get the correct | |
218 | * lexical conventions. | |
219 | */ | |
220 | ||
221 | cp = linebuf; | |
222 | while (any(*cp, " \t")) | |
223 | cp++; | |
224 | if (*cp == '!') { | |
225 | if (sourcing) { | |
226 | printf("Can't \"!\" while sourcing\n"); | |
227 | unstack(); | |
228 | return(0); | |
229 | } | |
230 | shell(cp+1); | |
231 | return(0); | |
232 | } | |
233 | cp2 = word; | |
c0132ef0 | 234 | while (*cp && !any(*cp, " \t0123456789$^.:/-+*'\"")) |
ac72cd41 KS |
235 | *cp2++ = *cp++; |
236 | *cp2 = '\0'; | |
237 | ||
238 | /* | |
239 | * Look up the command; if not found, bitch. | |
240 | * Normally, a blank command would map to the | |
241 | * first command in the table; while sourcing, | |
242 | * however, we ignore blank lines to eliminate | |
243 | * confusion. | |
244 | */ | |
245 | ||
246 | if (sourcing && equal(word, "")) | |
247 | return(0); | |
248 | com = lex(word); | |
249 | if (com == NONE) { | |
250 | printf("What?\n"); | |
251 | if (sourcing) | |
252 | unstack(); | |
253 | return(0); | |
254 | } | |
255 | ||
128ec005 KS |
256 | /* |
257 | * See if we should execute the command -- if a conditional | |
258 | * we always execute it, otherwise, check the state of cond. | |
259 | */ | |
260 | ||
989e19a2 | 261 | if ((com->c_argtype & F) == 0) |
128ec005 KS |
262 | if (cond == CRCV && !rcvmode || cond == CSEND && rcvmode) |
263 | return(0); | |
264 | ||
ac72cd41 KS |
265 | /* |
266 | * Special case so that quit causes a return to | |
267 | * main, who will call the quit code directly. | |
268 | * If we are in a source file, just unstack. | |
269 | */ | |
270 | ||
271 | if (com->c_func == edstop && sourcing) { | |
272 | unstack(); | |
273 | return(0); | |
274 | } | |
275 | if (!edit && com->c_func == edstop) { | |
726c3356 | 276 | sigset(SIGINT, SIG_IGN); |
ac72cd41 KS |
277 | return(1); |
278 | } | |
279 | ||
280 | /* | |
281 | * Process the arguments to the command, depending | |
282 | * on the type he expects. Default to an error. | |
283 | * If we are sourcing an interactive command, it's | |
284 | * an error. | |
285 | */ | |
286 | ||
287 | if (!rcvmode && (com->c_argtype & M) == 0) { | |
288 | printf("May not execute \"%s\" while sending\n", | |
289 | com->c_name); | |
2cd8e0a9 KS |
290 | if (sourcing) |
291 | unstack(); | |
ac72cd41 KS |
292 | return(0); |
293 | } | |
294 | if (sourcing && com->c_argtype & I) { | |
295 | printf("May not execute \"%s\" while sourcing\n", | |
296 | com->c_name); | |
297 | unstack(); | |
298 | return(0); | |
299 | } | |
e5717bff KS |
300 | if (readonly && com->c_argtype & W) { |
301 | printf("May not execute \"%s\" -- message file is read only\n", | |
302 | com->c_name); | |
303 | if (sourcing) | |
304 | unstack(); | |
305 | return(0); | |
306 | } | |
2cd8e0a9 KS |
307 | if (contxt && com->c_argtype & R) { |
308 | printf("Cannot recursively invoke \"%s\"\n", com->c_name); | |
309 | return(0); | |
310 | } | |
ac72cd41 | 311 | e = 1; |
2cd8e0a9 | 312 | switch (com->c_argtype & ~(F|P|I|M|T|W|R)) { |
ac72cd41 KS |
313 | case MSGLIST: |
314 | /* | |
315 | * A message list defaulting to nearest forward | |
316 | * legal message. | |
317 | */ | |
318 | if ((c = getmsglist(cp, msgvec, com->c_msgflag)) < 0) | |
319 | break; | |
320 | if (c == 0) { | |
321 | *msgvec = first(com->c_msgflag, | |
322 | com->c_msgmask); | |
323 | msgvec[1] = NULL; | |
324 | } | |
325 | if (*msgvec == NULL) { | |
326 | printf("No applicable messages\n"); | |
327 | break; | |
328 | } | |
329 | e = (*com->c_func)(msgvec); | |
330 | break; | |
331 | ||
332 | case NDMLIST: | |
333 | /* | |
334 | * A message list with no defaults, but no error | |
335 | * if none exist. | |
336 | */ | |
337 | if (getmsglist(cp, msgvec, com->c_msgflag) < 0) | |
338 | break; | |
339 | e = (*com->c_func)(msgvec); | |
340 | break; | |
341 | ||
342 | case STRLIST: | |
343 | /* | |
344 | * Just the straight string, with | |
345 | * leading blanks removed. | |
346 | */ | |
347 | while (any(*cp, " \t")) | |
348 | cp++; | |
349 | e = (*com->c_func)(cp); | |
350 | break; | |
351 | ||
352 | case RAWLIST: | |
353 | /* | |
354 | * A vector of strings, in shell style. | |
355 | */ | |
356 | if ((c = getrawlist(cp, arglist)) < 0) | |
357 | break; | |
358 | if (c < com->c_minargs) { | |
359 | printf("%s requires at least %d arg(s)\n", | |
360 | com->c_name, com->c_minargs); | |
361 | break; | |
362 | } | |
363 | if (c > com->c_maxargs) { | |
364 | printf("%s takes no more than %d arg(s)\n", | |
365 | com->c_name, com->c_maxargs); | |
366 | break; | |
367 | } | |
368 | e = (*com->c_func)(arglist); | |
369 | break; | |
370 | ||
371 | case NOLIST: | |
372 | /* | |
373 | * Just the constant zero, for exiting, | |
374 | * eg. | |
375 | */ | |
376 | e = (*com->c_func)(0); | |
377 | break; | |
378 | ||
379 | default: | |
380 | panic("Unknown argtype"); | |
381 | } | |
382 | ||
383 | /* | |
384 | * Exit the current source file on | |
385 | * error. | |
386 | */ | |
387 | ||
388 | if (e && sourcing) | |
389 | unstack(); | |
390 | if (com->c_func == edstop) | |
391 | return(1); | |
392 | if (value("autoprint") != NOSTR && com->c_argtype & P) | |
e5717bff KS |
393 | if ((dot->m_flag & MDELETED) == 0) { |
394 | muvec[0] = dot - &message[0] + 1; | |
395 | muvec[1] = 0; | |
396 | type(muvec); | |
397 | } | |
128ec005 | 398 | if (!sourcing && (com->c_argtype & T) == 0) |
ac72cd41 KS |
399 | sawcom = 1; |
400 | return(0); | |
401 | } | |
402 | ||
de274ec3 KS |
403 | /* |
404 | * When we wake up after ^Z, reprint the prompt. | |
405 | */ | |
406 | contin(s) | |
407 | { | |
408 | ||
409 | printf("_\r"); | |
410 | fflush(stdout); | |
411 | } | |
412 | ||
726c3356 KS |
413 | /* |
414 | * Branch here on hangup signal and simulate quit. | |
415 | */ | |
416 | hangup() | |
417 | { | |
726c3356 | 418 | |
177b7a73 | 419 | holdsigs(); |
726c3356 KS |
420 | if (edit) { |
421 | if (setexit()) | |
422 | exit(0); | |
423 | edstop(); | |
424 | } | |
425 | else | |
426 | quit(); | |
427 | exit(0); | |
428 | } | |
429 | ||
e5717bff KS |
430 | /* |
431 | * Set the size of the message vector used to construct argument | |
432 | * lists to message list functions. | |
433 | */ | |
434 | ||
435 | setmsize(sz) | |
436 | { | |
437 | ||
438 | if (msgvec != (int *) 0) | |
439 | cfree(msgvec); | |
440 | msgvec = (int *) calloc((unsigned) (sz + 1), sizeof *msgvec); | |
441 | } | |
442 | ||
ac72cd41 KS |
443 | /* |
444 | * Find the correct command in the command table corresponding | |
445 | * to the passed command "word" | |
446 | */ | |
447 | ||
448 | struct cmd * | |
449 | lex(word) | |
450 | char word[]; | |
451 | { | |
452 | register struct cmd *cp; | |
453 | extern struct cmd cmdtab[]; | |
454 | ||
455 | for (cp = &cmdtab[0]; cp->c_name != NOSTR; cp++) | |
456 | if (isprefix(word, cp->c_name)) | |
457 | return(cp); | |
458 | return(NONE); | |
459 | } | |
460 | ||
461 | /* | |
462 | * Determine if as1 is a valid prefix of as2. | |
463 | * Return true if yep. | |
464 | */ | |
465 | ||
466 | isprefix(as1, as2) | |
467 | char *as1, *as2; | |
468 | { | |
469 | register char *s1, *s2; | |
470 | ||
471 | s1 = as1; | |
472 | s2 = as2; | |
473 | while (*s1++ == *s2) | |
474 | if (*s2++ == '\0') | |
475 | return(1); | |
476 | return(*--s1 == '\0'); | |
477 | } | |
478 | ||
479 | /* | |
480 | * The following gets called on receipt of a rubout. This is | |
481 | * to abort printout of a command, mainly. | |
482 | * Dispatching here when command() is inactive crashes rcv. | |
483 | * Close all open files except 0, 1, 2, and the temporary. | |
484 | * The special call to getuserid() is needed so it won't get | |
485 | * annoyed about losing its open file. | |
486 | * Also, unstack all source files. | |
487 | */ | |
488 | ||
e39b1d85 KS |
489 | int inithdr; /* am printing startup headers */ |
490 | ||
726c3356 | 491 | stop(s) |
ac72cd41 KS |
492 | { |
493 | register FILE *fp; | |
494 | ||
495 | noreset = 0; | |
e39b1d85 KS |
496 | if (!inithdr) |
497 | sawcom++; | |
498 | inithdr = 0; | |
ac72cd41 KS |
499 | while (sourcing) |
500 | unstack(); | |
501 | getuserid((char *) -1); | |
502 | for (fp = &_iob[0]; fp < &_iob[_NFILE]; fp++) { | |
503 | if (fp == stdin || fp == stdout) | |
504 | continue; | |
505 | if (fp == itf || fp == otf) | |
506 | continue; | |
507 | if (fp == stderr) | |
508 | continue; | |
e5717bff KS |
509 | if (fp == pipef) { |
510 | pclose(pipef); | |
511 | pipef = NULL; | |
512 | continue; | |
513 | } | |
ac72cd41 KS |
514 | fclose(fp); |
515 | } | |
516 | if (image >= 0) { | |
517 | close(image); | |
518 | image = -1; | |
519 | } | |
520 | clrbuf(stdout); | |
521 | printf("Interrupt\n"); | |
726c3356 | 522 | sigrelse(s); |
ac72cd41 KS |
523 | reset(0); |
524 | } | |
525 | ||
526 | /* | |
527 | * Announce the presence of the current Mail version, | |
528 | * give the message count, and print a header listing. | |
529 | */ | |
530 | ||
a0aaf589 | 531 | char *greeting = "Mail version %s. Type ? for help.\n"; |
ac72cd41 | 532 | |
e5717bff | 533 | announce(pr) |
ac72cd41 | 534 | { |
f3bfa857 | 535 | int vec[2], mdot; |
ac72cd41 | 536 | extern char *version; |
74745497 KS |
537 | |
538 | mdot = newfileinfo(); | |
539 | vec[0] = mdot; | |
540 | vec[1] = 0; | |
541 | if (pr && value("quiet") == NOSTR) | |
542 | printf(greeting, version); | |
543 | dot = &message[mdot - 1]; | |
e39b1d85 KS |
544 | if (msgCount > 0 && !noheader) { |
545 | inithdr++; | |
74745497 | 546 | headers(vec); |
e39b1d85 KS |
547 | inithdr = 0; |
548 | } | |
74745497 KS |
549 | } |
550 | ||
551 | /* | |
552 | * Announce information about the file we are editing. | |
553 | * Return a likely place to set dot. | |
554 | */ | |
555 | ||
556 | newfileinfo() | |
557 | { | |
ac72cd41 | 558 | register struct message *mp; |
74745497 | 559 | register int u, n, mdot; |
ac72cd41 | 560 | |
c52f0860 KS |
561 | for (mp = &message[0]; mp < &message[msgCount]; mp++) |
562 | if (mp->m_flag & MNEW) | |
563 | break; | |
f3bfa857 KS |
564 | if (mp >= &message[msgCount]) |
565 | for (mp = &message[0]; mp < &message[msgCount]; mp++) | |
566 | if ((mp->m_flag & MREAD) == 0) | |
567 | break; | |
c52f0860 | 568 | if (mp < &message[msgCount]) |
f3bfa857 | 569 | mdot = mp - &message[0] + 1; |
c52f0860 | 570 | else |
f3bfa857 | 571 | mdot = 1; |
128ec005 KS |
572 | for (mp = &message[0], n = 0, u = 0; mp < &message[msgCount]; mp++) { |
573 | if (mp->m_flag & MNEW) | |
574 | n++; | |
575 | if ((mp->m_flag & MREAD) == 0) | |
576 | u++; | |
577 | } | |
74745497 KS |
578 | printf("\"%s\": ", mailname); |
579 | if (msgCount == 1) | |
580 | printf("1 message"); | |
581 | else | |
582 | printf("%d messages", msgCount); | |
128ec005 KS |
583 | if (n > 0) |
584 | printf(" %d new", n); | |
585 | if (u-n > 0) | |
586 | printf(" %d unread", u); | |
74745497 KS |
587 | if (readonly) |
588 | printf(" [Read only]"); | |
e5717bff | 589 | printf("\n"); |
74745497 | 590 | return(mdot); |
ac72cd41 KS |
591 | } |
592 | ||
593 | strace() {} | |
594 | ||
595 | /* | |
596 | * Print the current version number. | |
597 | */ | |
598 | ||
599 | pversion(e) | |
600 | { | |
a0aaf589 | 601 | printf("Version %s\n", version); |
ac72cd41 KS |
602 | return(0); |
603 | } |