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 | ||
4bc721c3 | 11 | static char *SccsId = "@(#)lex.c 2.12 %G%"; |
07c257b5 KS |
12 | |
13 | char *prompt = "& "; | |
e5717bff KS |
14 | |
15 | /* | |
16 | * Set up editing on the given file name. | |
17 | * If isedit is true, we are considered to be editing the file, | |
18 | * otherwise we are reading our mail which has signficance for | |
19 | * mbox and so forth. | |
20 | */ | |
21 | ||
22 | setfile(name, isedit) | |
23 | char *name; | |
24 | { | |
25 | FILE *ibuf; | |
26 | int i; | |
27 | static int shudclob; | |
28 | static char efile[128]; | |
29 | extern char tempMesg[]; | |
e5717bff | 30 | |
531fa87e | 31 | if ((ibuf = fopen(name, "r")) == NULL) |
e5717bff | 32 | return(-1); |
e5717bff KS |
33 | |
34 | /* | |
35 | * Looks like all will be well. We must now relinquish our | |
177b7a73 | 36 | * hold on the current set of stuff. Must hold signals |
e5717bff KS |
37 | * while we are reading the new file, else we will ruin |
38 | * the message[] data structure. | |
39 | */ | |
40 | ||
177b7a73 | 41 | holdsigs(); |
e5717bff KS |
42 | if (shudclob) { |
43 | if (edit) | |
44 | edstop(); | |
45 | else | |
46 | quit(); | |
47 | } | |
48 | ||
49 | /* | |
50 | * Copy the messages into /tmp | |
51 | * and set pointers. | |
52 | */ | |
53 | ||
54 | readonly = 0; | |
55 | if ((i = open(name, 1)) < 0) | |
56 | readonly++; | |
57 | else | |
58 | close(i); | |
59 | if (shudclob) { | |
60 | fclose(itf); | |
61 | fclose(otf); | |
62 | } | |
63 | shudclob = 1; | |
64 | edit = isedit; | |
65 | strncpy(efile, name, 128); | |
66 | editfile = efile; | |
128ec005 KS |
67 | if (name != mailname) |
68 | strcpy(mailname, name); | |
e5717bff KS |
69 | mailsize = fsize(ibuf); |
70 | if ((otf = fopen(tempMesg, "w")) == NULL) { | |
71 | perror(tempMesg); | |
72 | exit(1); | |
73 | } | |
74 | if ((itf = fopen(tempMesg, "r")) == NULL) { | |
75 | perror(tempMesg); | |
76 | exit(1); | |
77 | } | |
78 | remove(tempMesg); | |
79 | setptr(ibuf); | |
80 | setmsize(msgCount); | |
81 | fclose(ibuf); | |
177b7a73 | 82 | relsesigs(); |
335704ca | 83 | sawcom = 0; |
e5717bff KS |
84 | return(0); |
85 | } | |
ac72cd41 KS |
86 | |
87 | /* | |
88 | * Interpret user commands one by one. If standard input is not a tty, | |
89 | * print no prompt. | |
90 | */ | |
91 | ||
92 | int *msgvec; | |
93 | ||
94 | commands() | |
95 | { | |
7a05656e | 96 | int eofloop, shudprompt, stop(); |
ac72cd41 KS |
97 | register int n; |
98 | char linebuf[LINESIZE]; | |
de274ec3 | 99 | int hangup(), contin(); |
ac72cd41 | 100 | |
ea394d88 | 101 | # ifdef VMUNIX |
d28ecfdf | 102 | sigset(SIGCONT, SIG_DFL); |
ea394d88 | 103 | # endif VMUNIX |
7a05656e | 104 | if (rcvmode && !sourcing) { |
726c3356 KS |
105 | if (sigset(SIGINT, SIG_IGN) != SIG_IGN) |
106 | sigset(SIGINT, stop); | |
107 | if (sigset(SIGHUP, SIG_IGN) != SIG_IGN) | |
108 | sigset(SIGHUP, hangup); | |
109 | } | |
7a05656e | 110 | shudprompt = intty && !sourcing; |
ac72cd41 KS |
111 | for (;;) { |
112 | setexit(); | |
ac72cd41 KS |
113 | |
114 | /* | |
115 | * Print the prompt, if needed. Clear out | |
116 | * string space, and flush the output. | |
117 | */ | |
118 | ||
119 | if (!rcvmode && !sourcing) | |
120 | return; | |
853e9d55 | 121 | eofloop = 0; |
73f94fab | 122 | top: |
7a05656e | 123 | if (shudprompt) { |
6c85fa2a | 124 | # ifdef VMUNIX |
d28ecfdf | 125 | sigset(SIGCONT, contin); |
ea394d88 | 126 | # endif VMUNIX |
07c257b5 | 127 | printf(prompt); |
de274ec3 | 128 | } |
ac72cd41 KS |
129 | flush(); |
130 | sreset(); | |
131 | ||
132 | /* | |
133 | * Read a line of commands from the current input | |
134 | * and handle end of file specially. | |
135 | */ | |
136 | ||
137 | n = 0; | |
138 | for (;;) { | |
139 | if (readline(input, &linebuf[n]) <= 0) { | |
140 | if (n != 0) | |
141 | break; | |
7a05656e KS |
142 | if (loading) |
143 | return; | |
ac72cd41 KS |
144 | if (sourcing) { |
145 | unstack(); | |
146 | goto more; | |
147 | } | |
07c257b5 | 148 | if (value("ignoreeof") != NOSTR && shudprompt) { |
853e9d55 KS |
149 | if (++eofloop < 25) { |
150 | printf("Use \"quit\" to quit.\n"); | |
151 | goto top; | |
152 | } | |
73f94fab | 153 | } |
7a05656e KS |
154 | if (edit) |
155 | edstop(); | |
ac72cd41 KS |
156 | return; |
157 | } | |
158 | if ((n = strlen(linebuf)) == 0) | |
159 | break; | |
160 | n--; | |
161 | if (linebuf[n] != '\\') | |
162 | break; | |
163 | linebuf[n++] = ' '; | |
164 | } | |
ea394d88 | 165 | # ifdef VMUNIX |
d28ecfdf | 166 | sigset(SIGCONT, SIG_DFL); |
ea394d88 | 167 | # endif VMUNIX |
2cd8e0a9 | 168 | if (execute(linebuf, 0)) |
ac72cd41 KS |
169 | return; |
170 | more: ; | |
171 | } | |
172 | } | |
173 | ||
174 | /* | |
175 | * Execute a single command. If the command executed | |
176 | * is "quit," then return non-zero so that the caller | |
177 | * will know to return back to main, if he cares. | |
2cd8e0a9 | 178 | * Contxt is non-zero if called while composing mail. |
ac72cd41 KS |
179 | */ |
180 | ||
2cd8e0a9 | 181 | execute(linebuf, contxt) |
ac72cd41 KS |
182 | char linebuf[]; |
183 | { | |
184 | char word[LINESIZE]; | |
185 | char *arglist[MAXARGC]; | |
186 | struct cmd *com; | |
187 | register char *cp, *cp2; | |
188 | register int c; | |
e5717bff | 189 | int muvec[2]; |
ac72cd41 KS |
190 | int edstop(), e; |
191 | ||
192 | /* | |
193 | * Strip the white space away from the beginning | |
194 | * of the command, then scan out a word, which | |
195 | * consists of anything except digits and white space. | |
196 | * | |
197 | * Handle ! escapes differently to get the correct | |
198 | * lexical conventions. | |
199 | */ | |
200 | ||
201 | cp = linebuf; | |
202 | while (any(*cp, " \t")) | |
203 | cp++; | |
204 | if (*cp == '!') { | |
205 | if (sourcing) { | |
206 | printf("Can't \"!\" while sourcing\n"); | |
207 | unstack(); | |
208 | return(0); | |
209 | } | |
210 | shell(cp+1); | |
211 | return(0); | |
212 | } | |
213 | cp2 = word; | |
c0132ef0 | 214 | while (*cp && !any(*cp, " \t0123456789$^.:/-+*'\"")) |
ac72cd41 KS |
215 | *cp2++ = *cp++; |
216 | *cp2 = '\0'; | |
217 | ||
218 | /* | |
219 | * Look up the command; if not found, bitch. | |
220 | * Normally, a blank command would map to the | |
221 | * first command in the table; while sourcing, | |
222 | * however, we ignore blank lines to eliminate | |
223 | * confusion. | |
224 | */ | |
225 | ||
226 | if (sourcing && equal(word, "")) | |
227 | return(0); | |
228 | com = lex(word); | |
229 | if (com == NONE) { | |
7a05656e KS |
230 | printf("Unknown command: \"%s\"\n", word); |
231 | if (loading) | |
232 | return(1); | |
ac72cd41 KS |
233 | if (sourcing) |
234 | unstack(); | |
235 | return(0); | |
236 | } | |
237 | ||
128ec005 KS |
238 | /* |
239 | * See if we should execute the command -- if a conditional | |
240 | * we always execute it, otherwise, check the state of cond. | |
241 | */ | |
242 | ||
989e19a2 | 243 | if ((com->c_argtype & F) == 0) |
128ec005 KS |
244 | if (cond == CRCV && !rcvmode || cond == CSEND && rcvmode) |
245 | return(0); | |
246 | ||
ac72cd41 KS |
247 | /* |
248 | * Special case so that quit causes a return to | |
249 | * main, who will call the quit code directly. | |
250 | * If we are in a source file, just unstack. | |
251 | */ | |
252 | ||
253 | if (com->c_func == edstop && sourcing) { | |
7a05656e KS |
254 | if (loading) |
255 | return(1); | |
ac72cd41 KS |
256 | unstack(); |
257 | return(0); | |
258 | } | |
259 | if (!edit && com->c_func == edstop) { | |
726c3356 | 260 | sigset(SIGINT, SIG_IGN); |
ac72cd41 KS |
261 | return(1); |
262 | } | |
263 | ||
264 | /* | |
265 | * Process the arguments to the command, depending | |
266 | * on the type he expects. Default to an error. | |
267 | * If we are sourcing an interactive command, it's | |
268 | * an error. | |
269 | */ | |
270 | ||
271 | if (!rcvmode && (com->c_argtype & M) == 0) { | |
272 | printf("May not execute \"%s\" while sending\n", | |
273 | com->c_name); | |
7a05656e KS |
274 | if (loading) |
275 | return(1); | |
2cd8e0a9 KS |
276 | if (sourcing) |
277 | unstack(); | |
ac72cd41 KS |
278 | return(0); |
279 | } | |
280 | if (sourcing && com->c_argtype & I) { | |
281 | printf("May not execute \"%s\" while sourcing\n", | |
282 | com->c_name); | |
7a05656e KS |
283 | if (loading) |
284 | return(1); | |
ac72cd41 KS |
285 | unstack(); |
286 | return(0); | |
287 | } | |
e5717bff KS |
288 | if (readonly && com->c_argtype & W) { |
289 | printf("May not execute \"%s\" -- message file is read only\n", | |
290 | com->c_name); | |
7a05656e KS |
291 | if (loading) |
292 | return(1); | |
e5717bff KS |
293 | if (sourcing) |
294 | unstack(); | |
295 | return(0); | |
296 | } | |
2cd8e0a9 KS |
297 | if (contxt && com->c_argtype & R) { |
298 | printf("Cannot recursively invoke \"%s\"\n", com->c_name); | |
299 | return(0); | |
300 | } | |
ac72cd41 | 301 | e = 1; |
2cd8e0a9 | 302 | switch (com->c_argtype & ~(F|P|I|M|T|W|R)) { |
ac72cd41 KS |
303 | case MSGLIST: |
304 | /* | |
305 | * A message list defaulting to nearest forward | |
306 | * legal message. | |
307 | */ | |
7a05656e KS |
308 | if (msgvec == 0) { |
309 | printf("Illegal use of \"message list\"\n"); | |
310 | return(-1); | |
311 | } | |
ac72cd41 KS |
312 | if ((c = getmsglist(cp, msgvec, com->c_msgflag)) < 0) |
313 | break; | |
314 | if (c == 0) { | |
315 | *msgvec = first(com->c_msgflag, | |
316 | com->c_msgmask); | |
317 | msgvec[1] = NULL; | |
318 | } | |
319 | if (*msgvec == NULL) { | |
320 | printf("No applicable messages\n"); | |
321 | break; | |
322 | } | |
323 | e = (*com->c_func)(msgvec); | |
324 | break; | |
325 | ||
326 | case NDMLIST: | |
327 | /* | |
328 | * A message list with no defaults, but no error | |
329 | * if none exist. | |
330 | */ | |
7a05656e KS |
331 | if (msgvec == 0) { |
332 | printf("Illegal use of \"message list\"\n"); | |
333 | return(-1); | |
334 | } | |
ac72cd41 KS |
335 | if (getmsglist(cp, msgvec, com->c_msgflag) < 0) |
336 | break; | |
337 | e = (*com->c_func)(msgvec); | |
338 | break; | |
339 | ||
340 | case STRLIST: | |
341 | /* | |
342 | * Just the straight string, with | |
343 | * leading blanks removed. | |
344 | */ | |
345 | while (any(*cp, " \t")) | |
346 | cp++; | |
347 | e = (*com->c_func)(cp); | |
348 | break; | |
349 | ||
350 | case RAWLIST: | |
351 | /* | |
352 | * A vector of strings, in shell style. | |
353 | */ | |
354 | if ((c = getrawlist(cp, arglist)) < 0) | |
355 | break; | |
356 | if (c < com->c_minargs) { | |
357 | printf("%s requires at least %d arg(s)\n", | |
358 | com->c_name, com->c_minargs); | |
359 | break; | |
360 | } | |
361 | if (c > com->c_maxargs) { | |
362 | printf("%s takes no more than %d arg(s)\n", | |
363 | com->c_name, com->c_maxargs); | |
364 | break; | |
365 | } | |
366 | e = (*com->c_func)(arglist); | |
367 | break; | |
368 | ||
369 | case NOLIST: | |
370 | /* | |
371 | * Just the constant zero, for exiting, | |
372 | * eg. | |
373 | */ | |
374 | e = (*com->c_func)(0); | |
375 | break; | |
376 | ||
377 | default: | |
378 | panic("Unknown argtype"); | |
379 | } | |
380 | ||
381 | /* | |
382 | * Exit the current source file on | |
383 | * error. | |
384 | */ | |
385 | ||
7a05656e KS |
386 | if (e && loading) |
387 | return(1); | |
ac72cd41 KS |
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 | ||
07c257b5 | 409 | printf(prompt); |
de274ec3 KS |
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 | ||
ea394d88 KS |
495 | # ifndef VMUNIX |
496 | s = SIGINT; | |
497 | # endif VMUNIX | |
ac72cd41 | 498 | noreset = 0; |
e39b1d85 KS |
499 | if (!inithdr) |
500 | sawcom++; | |
501 | inithdr = 0; | |
ac72cd41 KS |
502 | while (sourcing) |
503 | unstack(); | |
504 | getuserid((char *) -1); | |
505 | for (fp = &_iob[0]; fp < &_iob[_NFILE]; fp++) { | |
506 | if (fp == stdin || fp == stdout) | |
507 | continue; | |
508 | if (fp == itf || fp == otf) | |
509 | continue; | |
510 | if (fp == stderr) | |
511 | continue; | |
e5717bff KS |
512 | if (fp == pipef) { |
513 | pclose(pipef); | |
514 | pipef = NULL; | |
515 | continue; | |
516 | } | |
ac72cd41 KS |
517 | fclose(fp); |
518 | } | |
519 | if (image >= 0) { | |
520 | close(image); | |
521 | image = -1; | |
522 | } | |
523 | clrbuf(stdout); | |
524 | printf("Interrupt\n"); | |
4bc721c3 | 525 | # ifndef VMUNIX |
ea394d88 KS |
526 | signal(s, stop); |
527 | # endif | |
ac72cd41 KS |
528 | reset(0); |
529 | } | |
530 | ||
531 | /* | |
532 | * Announce the presence of the current Mail version, | |
533 | * give the message count, and print a header listing. | |
534 | */ | |
535 | ||
a0aaf589 | 536 | char *greeting = "Mail version %s. Type ? for help.\n"; |
ac72cd41 | 537 | |
e5717bff | 538 | announce(pr) |
ac72cd41 | 539 | { |
f3bfa857 | 540 | int vec[2], mdot; |
ac72cd41 | 541 | extern char *version; |
74745497 | 542 | |
125e424c CL |
543 | if (pr && value("quiet") == NOSTR) |
544 | printf(greeting, version); | |
74745497 KS |
545 | mdot = newfileinfo(); |
546 | vec[0] = mdot; | |
547 | vec[1] = 0; | |
74745497 | 548 | dot = &message[mdot - 1]; |
e39b1d85 KS |
549 | if (msgCount > 0 && !noheader) { |
550 | inithdr++; | |
74745497 | 551 | headers(vec); |
e39b1d85 KS |
552 | inithdr = 0; |
553 | } | |
74745497 KS |
554 | } |
555 | ||
556 | /* | |
557 | * Announce information about the file we are editing. | |
558 | * Return a likely place to set dot. | |
559 | */ | |
74745497 KS |
560 | newfileinfo() |
561 | { | |
ac72cd41 | 562 | register struct message *mp; |
83be1edb | 563 | register int u, n, mdot, d, s; |
46d3d6df | 564 | char fname[BUFSIZ], zname[BUFSIZ], *ename; |
ac72cd41 | 565 | |
c52f0860 KS |
566 | for (mp = &message[0]; mp < &message[msgCount]; mp++) |
567 | if (mp->m_flag & MNEW) | |
568 | break; | |
f3bfa857 KS |
569 | if (mp >= &message[msgCount]) |
570 | for (mp = &message[0]; mp < &message[msgCount]; mp++) | |
571 | if ((mp->m_flag & MREAD) == 0) | |
572 | break; | |
c52f0860 | 573 | if (mp < &message[msgCount]) |
f3bfa857 | 574 | mdot = mp - &message[0] + 1; |
c52f0860 | 575 | else |
f3bfa857 | 576 | mdot = 1; |
83be1edb | 577 | s = d = 0; |
128ec005 KS |
578 | for (mp = &message[0], n = 0, u = 0; mp < &message[msgCount]; mp++) { |
579 | if (mp->m_flag & MNEW) | |
580 | n++; | |
581 | if ((mp->m_flag & MREAD) == 0) | |
582 | u++; | |
83be1edb KS |
583 | if (mp->m_flag & MDELETED) |
584 | d++; | |
585 | if (mp->m_flag & MSAVED) | |
586 | s++; | |
128ec005 | 587 | } |
46d3d6df KS |
588 | ename = mailname; |
589 | if (getfold(fname) >= 0) { | |
590 | strcat(fname, "/"); | |
591 | if (strncmp(fname, mailname, strlen(fname)) == 0) { | |
592 | sprintf(zname, "+%s", mailname + strlen(fname)); | |
593 | ename = zname; | |
594 | } | |
595 | } | |
596 | printf("\"%s\": ", ename); | |
74745497 KS |
597 | if (msgCount == 1) |
598 | printf("1 message"); | |
599 | else | |
600 | printf("%d messages", msgCount); | |
128ec005 KS |
601 | if (n > 0) |
602 | printf(" %d new", n); | |
603 | if (u-n > 0) | |
604 | printf(" %d unread", u); | |
83be1edb KS |
605 | if (d > 0) |
606 | printf(" %d deleted", d); | |
607 | if (s > 0) | |
608 | printf(" %d saved", s); | |
74745497 KS |
609 | if (readonly) |
610 | printf(" [Read only]"); | |
e5717bff | 611 | printf("\n"); |
74745497 | 612 | return(mdot); |
ac72cd41 KS |
613 | } |
614 | ||
615 | strace() {} | |
616 | ||
617 | /* | |
618 | * Print the current version number. | |
619 | */ | |
620 | ||
621 | pversion(e) | |
622 | { | |
a0aaf589 | 623 | printf("Version %s\n", version); |
ac72cd41 KS |
624 | return(0); |
625 | } | |
7a05656e KS |
626 | |
627 | /* | |
628 | * Load a file of user definitions. | |
629 | */ | |
630 | load(name) | |
631 | char *name; | |
632 | { | |
633 | register FILE *in, *oldin; | |
634 | ||
635 | if ((in = fopen(name, "r")) == NULL) | |
636 | return; | |
637 | oldin = input; | |
638 | input = in; | |
639 | loading = 1; | |
640 | sourcing = 1; | |
641 | commands(); | |
642 | loading = 0; | |
643 | sourcing = 0; | |
644 | input = oldin; | |
645 | fclose(in); | |
646 | } |