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 | ||
4d931f76 | 11 | static char *SccsId = "@(#)lex.c 1.5 %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[]; | |
28 | int (*sigs[2])(); | |
29 | ||
30 | if ((ibuf = fopen(name, "r")) == NULL) { | |
31 | if (isedit) | |
32 | perror(name); | |
33 | else | |
34 | printf("No mail for %s\n", myname); | |
35 | return(-1); | |
36 | } | |
37 | ||
38 | /* | |
39 | * Looks like all will be well. We must now relinquish our | |
40 | * hold on the current set of stuff. Must ignore signals | |
41 | * while we are reading the new file, else we will ruin | |
42 | * the message[] data structure. | |
43 | */ | |
44 | ||
45 | for (i = SIGINT; i <= SIGQUIT; i++) | |
46 | sigs[i - SIGINT] = signal(i, SIG_IGN); | |
47 | if (shudclob) { | |
48 | if (edit) | |
49 | edstop(); | |
50 | else | |
51 | quit(); | |
52 | } | |
53 | ||
54 | /* | |
55 | * Copy the messages into /tmp | |
56 | * and set pointers. | |
57 | */ | |
58 | ||
59 | readonly = 0; | |
60 | if ((i = open(name, 1)) < 0) | |
61 | readonly++; | |
62 | else | |
63 | close(i); | |
64 | if (shudclob) { | |
65 | fclose(itf); | |
66 | fclose(otf); | |
67 | } | |
68 | shudclob = 1; | |
69 | edit = isedit; | |
70 | strncpy(efile, name, 128); | |
71 | editfile = efile; | |
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); | |
85 | for (i = SIGINT; i <= SIGQUIT; i++) | |
86 | signal(i, sigs[i - SIGINT]); | |
87 | printf("%s: ", name); | |
4d931f76 | 88 | shudann = 1; |
335704ca | 89 | sawcom = 0; |
e5717bff KS |
90 | return(0); |
91 | } | |
ac72cd41 KS |
92 | |
93 | /* | |
94 | * Interpret user commands one by one. If standard input is not a tty, | |
95 | * print no prompt. | |
96 | */ | |
97 | ||
98 | int *msgvec; | |
99 | ||
100 | commands() | |
101 | { | |
102 | int prompt, firstsw, stop(); | |
103 | register int n; | |
104 | char linebuf[LINESIZE]; | |
105 | ||
ac72cd41 KS |
106 | if (rcvmode) |
107 | if (signal(SIGINT, SIG_IGN) == SIG_DFL) | |
108 | signal(SIGINT, stop); | |
109 | input = stdin; | |
110 | prompt = 1; | |
111 | if (!intty) | |
112 | prompt = 0; | |
113 | firstsw = 1; | |
114 | for (;;) { | |
115 | setexit(); | |
116 | if (firstsw > 0) { | |
117 | firstsw = 0; | |
118 | source1(mailrc); | |
119 | if (!nosrc) | |
120 | source1(MASTER); | |
121 | } | |
122 | ||
123 | /* | |
124 | * How's this for obscure: after we | |
125 | * finish sourcing for the first time, | |
126 | * go off and print the headers! | |
127 | */ | |
128 | ||
4d931f76 KS |
129 | if (shudann && !sourcing) { |
130 | shudann = 0; | |
ac72cd41 | 131 | if (rcvmode) |
4d931f76 | 132 | announce(edit); |
ac72cd41 KS |
133 | } |
134 | ||
135 | /* | |
136 | * Print the prompt, if needed. Clear out | |
137 | * string space, and flush the output. | |
138 | */ | |
139 | ||
140 | if (!rcvmode && !sourcing) | |
141 | return; | |
73f94fab | 142 | top: |
ac72cd41 KS |
143 | if (prompt && !sourcing) |
144 | printf("_\r"); | |
145 | flush(); | |
146 | sreset(); | |
147 | ||
148 | /* | |
149 | * Read a line of commands from the current input | |
150 | * and handle end of file specially. | |
151 | */ | |
152 | ||
153 | n = 0; | |
154 | for (;;) { | |
155 | if (readline(input, &linebuf[n]) <= 0) { | |
156 | if (n != 0) | |
157 | break; | |
158 | if (sourcing) { | |
159 | unstack(); | |
160 | goto more; | |
161 | } | |
73f94fab KS |
162 | if (value("ignoreeof") != NOSTR && prompt) { |
163 | printf("Use \"quit\" to quit.\n"); | |
164 | goto top; | |
165 | } | |
ac72cd41 KS |
166 | if (!edit) { |
167 | signal(SIGINT, SIG_IGN); | |
168 | return; | |
169 | } | |
170 | edstop(); | |
171 | return; | |
172 | } | |
173 | if ((n = strlen(linebuf)) == 0) | |
174 | break; | |
175 | n--; | |
176 | if (linebuf[n] != '\\') | |
177 | break; | |
178 | linebuf[n++] = ' '; | |
179 | } | |
180 | if (execute(linebuf)) | |
181 | return; | |
182 | more: ; | |
183 | } | |
184 | } | |
185 | ||
186 | /* | |
187 | * Execute a single command. If the command executed | |
188 | * is "quit," then return non-zero so that the caller | |
189 | * will know to return back to main, if he cares. | |
190 | */ | |
191 | ||
192 | execute(linebuf) | |
193 | char linebuf[]; | |
194 | { | |
195 | char word[LINESIZE]; | |
196 | char *arglist[MAXARGC]; | |
197 | struct cmd *com; | |
198 | register char *cp, *cp2; | |
199 | register int c; | |
e5717bff | 200 | int muvec[2]; |
ac72cd41 KS |
201 | int edstop(), e; |
202 | ||
203 | /* | |
204 | * Strip the white space away from the beginning | |
205 | * of the command, then scan out a word, which | |
206 | * consists of anything except digits and white space. | |
207 | * | |
208 | * Handle ! escapes differently to get the correct | |
209 | * lexical conventions. | |
210 | */ | |
211 | ||
212 | cp = linebuf; | |
213 | while (any(*cp, " \t")) | |
214 | cp++; | |
215 | if (*cp == '!') { | |
216 | if (sourcing) { | |
217 | printf("Can't \"!\" while sourcing\n"); | |
218 | unstack(); | |
219 | return(0); | |
220 | } | |
221 | shell(cp+1); | |
222 | return(0); | |
223 | } | |
224 | cp2 = word; | |
e5717bff | 225 | while (*cp && !any(*cp, " \t0123456789$^./-+*'\"")) |
ac72cd41 KS |
226 | *cp2++ = *cp++; |
227 | *cp2 = '\0'; | |
228 | ||
229 | /* | |
230 | * Look up the command; if not found, bitch. | |
231 | * Normally, a blank command would map to the | |
232 | * first command in the table; while sourcing, | |
233 | * however, we ignore blank lines to eliminate | |
234 | * confusion. | |
235 | */ | |
236 | ||
237 | if (sourcing && equal(word, "")) | |
238 | return(0); | |
239 | com = lex(word); | |
240 | if (com == NONE) { | |
241 | printf("What?\n"); | |
242 | if (sourcing) | |
243 | unstack(); | |
244 | return(0); | |
245 | } | |
246 | ||
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) { | |
254 | unstack(); | |
255 | return(0); | |
256 | } | |
257 | if (!edit && com->c_func == edstop) { | |
258 | signal(SIGINT, SIG_IGN); | |
259 | return(1); | |
260 | } | |
261 | ||
262 | /* | |
263 | * Process the arguments to the command, depending | |
264 | * on the type he expects. Default to an error. | |
265 | * If we are sourcing an interactive command, it's | |
266 | * an error. | |
267 | */ | |
268 | ||
269 | if (!rcvmode && (com->c_argtype & M) == 0) { | |
270 | printf("May not execute \"%s\" while sending\n", | |
271 | com->c_name); | |
272 | unstack(); | |
273 | return(0); | |
274 | } | |
275 | if (sourcing && com->c_argtype & I) { | |
276 | printf("May not execute \"%s\" while sourcing\n", | |
277 | com->c_name); | |
278 | unstack(); | |
279 | return(0); | |
280 | } | |
e5717bff KS |
281 | if (readonly && com->c_argtype & W) { |
282 | printf("May not execute \"%s\" -- message file is read only\n", | |
283 | com->c_name); | |
284 | if (sourcing) | |
285 | unstack(); | |
286 | return(0); | |
287 | } | |
ac72cd41 | 288 | e = 1; |
e5717bff | 289 | switch (com->c_argtype & ~(P|I|M|W)) { |
ac72cd41 KS |
290 | case MSGLIST: |
291 | /* | |
292 | * A message list defaulting to nearest forward | |
293 | * legal message. | |
294 | */ | |
295 | if ((c = getmsglist(cp, msgvec, com->c_msgflag)) < 0) | |
296 | break; | |
297 | if (c == 0) { | |
298 | *msgvec = first(com->c_msgflag, | |
299 | com->c_msgmask); | |
300 | msgvec[1] = NULL; | |
301 | } | |
302 | if (*msgvec == NULL) { | |
303 | printf("No applicable messages\n"); | |
304 | break; | |
305 | } | |
306 | e = (*com->c_func)(msgvec); | |
307 | break; | |
308 | ||
309 | case NDMLIST: | |
310 | /* | |
311 | * A message list with no defaults, but no error | |
312 | * if none exist. | |
313 | */ | |
314 | if (getmsglist(cp, msgvec, com->c_msgflag) < 0) | |
315 | break; | |
316 | e = (*com->c_func)(msgvec); | |
317 | break; | |
318 | ||
319 | case STRLIST: | |
320 | /* | |
321 | * Just the straight string, with | |
322 | * leading blanks removed. | |
323 | */ | |
324 | while (any(*cp, " \t")) | |
325 | cp++; | |
326 | e = (*com->c_func)(cp); | |
327 | break; | |
328 | ||
329 | case RAWLIST: | |
330 | /* | |
331 | * A vector of strings, in shell style. | |
332 | */ | |
333 | if ((c = getrawlist(cp, arglist)) < 0) | |
334 | break; | |
335 | if (c < com->c_minargs) { | |
336 | printf("%s requires at least %d arg(s)\n", | |
337 | com->c_name, com->c_minargs); | |
338 | break; | |
339 | } | |
340 | if (c > com->c_maxargs) { | |
341 | printf("%s takes no more than %d arg(s)\n", | |
342 | com->c_name, com->c_maxargs); | |
343 | break; | |
344 | } | |
345 | e = (*com->c_func)(arglist); | |
346 | break; | |
347 | ||
348 | case NOLIST: | |
349 | /* | |
350 | * Just the constant zero, for exiting, | |
351 | * eg. | |
352 | */ | |
353 | e = (*com->c_func)(0); | |
354 | break; | |
355 | ||
356 | default: | |
357 | panic("Unknown argtype"); | |
358 | } | |
359 | ||
360 | /* | |
361 | * Exit the current source file on | |
362 | * error. | |
363 | */ | |
364 | ||
365 | if (e && sourcing) | |
366 | unstack(); | |
367 | if (com->c_func == edstop) | |
368 | return(1); | |
369 | if (value("autoprint") != NOSTR && com->c_argtype & P) | |
e5717bff KS |
370 | if ((dot->m_flag & MDELETED) == 0) { |
371 | muvec[0] = dot - &message[0] + 1; | |
372 | muvec[1] = 0; | |
373 | type(muvec); | |
374 | } | |
ac72cd41 KS |
375 | if (!sourcing) |
376 | sawcom = 1; | |
377 | return(0); | |
378 | } | |
379 | ||
e5717bff KS |
380 | /* |
381 | * Set the size of the message vector used to construct argument | |
382 | * lists to message list functions. | |
383 | */ | |
384 | ||
385 | setmsize(sz) | |
386 | { | |
387 | ||
388 | if (msgvec != (int *) 0) | |
389 | cfree(msgvec); | |
390 | msgvec = (int *) calloc((unsigned) (sz + 1), sizeof *msgvec); | |
391 | } | |
392 | ||
ac72cd41 KS |
393 | /* |
394 | * Find the correct command in the command table corresponding | |
395 | * to the passed command "word" | |
396 | */ | |
397 | ||
398 | struct cmd * | |
399 | lex(word) | |
400 | char word[]; | |
401 | { | |
402 | register struct cmd *cp; | |
403 | extern struct cmd cmdtab[]; | |
404 | ||
405 | for (cp = &cmdtab[0]; cp->c_name != NOSTR; cp++) | |
406 | if (isprefix(word, cp->c_name)) | |
407 | return(cp); | |
408 | return(NONE); | |
409 | } | |
410 | ||
411 | /* | |
412 | * Determine if as1 is a valid prefix of as2. | |
413 | * Return true if yep. | |
414 | */ | |
415 | ||
416 | isprefix(as1, as2) | |
417 | char *as1, *as2; | |
418 | { | |
419 | register char *s1, *s2; | |
420 | ||
421 | s1 = as1; | |
422 | s2 = as2; | |
423 | while (*s1++ == *s2) | |
424 | if (*s2++ == '\0') | |
425 | return(1); | |
426 | return(*--s1 == '\0'); | |
427 | } | |
428 | ||
429 | /* | |
430 | * The following gets called on receipt of a rubout. This is | |
431 | * to abort printout of a command, mainly. | |
432 | * Dispatching here when command() is inactive crashes rcv. | |
433 | * Close all open files except 0, 1, 2, and the temporary. | |
434 | * The special call to getuserid() is needed so it won't get | |
435 | * annoyed about losing its open file. | |
436 | * Also, unstack all source files. | |
437 | */ | |
438 | ||
439 | stop() | |
440 | { | |
441 | register FILE *fp; | |
442 | ||
443 | noreset = 0; | |
444 | signal(SIGINT, SIG_IGN); | |
445 | sawcom++; | |
446 | while (sourcing) | |
447 | unstack(); | |
448 | getuserid((char *) -1); | |
449 | for (fp = &_iob[0]; fp < &_iob[_NFILE]; fp++) { | |
450 | if (fp == stdin || fp == stdout) | |
451 | continue; | |
452 | if (fp == itf || fp == otf) | |
453 | continue; | |
454 | if (fp == stderr) | |
455 | continue; | |
e5717bff KS |
456 | if (fp == pipef) { |
457 | pclose(pipef); | |
458 | pipef = NULL; | |
459 | continue; | |
460 | } | |
ac72cd41 KS |
461 | fclose(fp); |
462 | } | |
463 | if (image >= 0) { | |
464 | close(image); | |
465 | image = -1; | |
466 | } | |
467 | clrbuf(stdout); | |
468 | printf("Interrupt\n"); | |
469 | signal(SIGINT, stop); | |
470 | reset(0); | |
471 | } | |
472 | ||
473 | /* | |
474 | * Announce the presence of the current Mail version, | |
475 | * give the message count, and print a header listing. | |
476 | */ | |
477 | ||
478 | char *greeting = "Mail version 2.0 %s. Type ? for help.\n"; | |
479 | ||
e5717bff | 480 | announce(pr) |
ac72cd41 KS |
481 | { |
482 | int vec[2]; | |
483 | extern char *version; | |
484 | register struct message *mp; | |
485 | ||
ac72cd41 KS |
486 | vec[0] = 1; |
487 | vec[1] = 0; | |
e5717bff | 488 | if (pr && value("quiet") == NOSTR) |
ac72cd41 KS |
489 | printf(greeting, version); |
490 | if (msgCount == 1) | |
e5717bff | 491 | printf("1 message"); |
ac72cd41 | 492 | else |
e5717bff KS |
493 | printf("%d messages", msgCount); |
494 | if (readonly) | |
495 | printf(" [Read only]"); | |
496 | printf("\n"); | |
ac72cd41 KS |
497 | headers(vec); |
498 | } | |
499 | ||
500 | strace() {} | |
501 | ||
502 | /* | |
503 | * Print the current version number. | |
504 | */ | |
505 | ||
506 | pversion(e) | |
507 | { | |
508 | printf(greeting, version); | |
509 | return(0); | |
510 | } |