Commit | Line | Data |
---|---|---|
ca6bb034 KS |
1 | # |
2 | ||
3 | #include "rcv.h" | |
4 | #include <sys/stat.h> | |
5 | ||
6 | /* | |
7 | * Mail -- a mail program | |
8 | * | |
9 | * Still more user commands. | |
10 | */ | |
11 | ||
79ddb121 | 12 | static char *SccsId = "@(#)cmd3.c 2.1 %G%"; |
ca6bb034 KS |
13 | |
14 | /* | |
15 | * Process a shell escape by saving signals, ignoring signals, | |
16 | * and forking a sh -c | |
17 | */ | |
18 | ||
19 | shell(str) | |
20 | char *str; | |
21 | { | |
22 | int (*sig[2])(), stat[1]; | |
23 | register int t; | |
24 | char *Shell; | |
e8adee6e | 25 | char cmd[BUFSIZ]; |
ca6bb034 | 26 | |
e8adee6e KS |
27 | strcpy(cmd, str); |
28 | if (bangexp(cmd) < 0) | |
29 | return(-1); | |
ca6bb034 KS |
30 | if ((Shell = value("SHELL")) == NOSTR) |
31 | Shell = SHELL; | |
32 | for (t = 2; t < 4; t++) | |
5f38a28f | 33 | sig[t-2] = sigset(t, SIG_IGN); |
ca6bb034 KS |
34 | t = vfork(); |
35 | if (t == 0) { | |
36 | for (t = 2; t < 4; t++) | |
37 | if (sig[t-2] != SIG_IGN) | |
5f38a28f | 38 | sigsys(t, SIG_DFL); |
e8adee6e | 39 | execl(Shell, Shell, "-c", cmd, 0); |
ca6bb034 KS |
40 | perror(Shell); |
41 | _exit(1); | |
42 | } | |
43 | while (wait(stat) != t) | |
44 | ; | |
45 | if (t == -1) | |
46 | perror("fork"); | |
47 | for (t = 2; t < 4; t++) | |
5f38a28f | 48 | sigset(t, sig[t-2]); |
ca6bb034 KS |
49 | printf("!\n"); |
50 | return(0); | |
51 | } | |
52 | ||
53 | /* | |
54 | * Fork an interactive shell. | |
55 | */ | |
56 | ||
57 | dosh(str) | |
58 | char *str; | |
59 | { | |
60 | int (*sig[2])(), stat[1]; | |
61 | register int t; | |
62 | char *Shell; | |
ca6bb034 KS |
63 | if ((Shell = value("SHELL")) == NOSTR) |
64 | Shell = SHELL; | |
65 | for (t = 2; t < 4; t++) | |
5f38a28f | 66 | sig[t-2] = sigset(t, SIG_IGN); |
ca6bb034 KS |
67 | t = vfork(); |
68 | if (t == 0) { | |
69 | for (t = 2; t < 4; t++) | |
70 | if (sig[t-2] != SIG_IGN) | |
5f38a28f | 71 | sigsys(t, SIG_DFL); |
ca6bb034 KS |
72 | execl(Shell, Shell, 0); |
73 | perror(Shell); | |
74 | _exit(1); | |
75 | } | |
76 | while (wait(stat) != t) | |
77 | ; | |
78 | if (t == -1) | |
79 | perror("fork"); | |
80 | for (t = 2; t < 4; t++) | |
5f38a28f | 81 | sigsys(t, sig[t-2]); |
ca6bb034 KS |
82 | putchar('\n'); |
83 | return(0); | |
84 | } | |
85 | ||
e8adee6e KS |
86 | /* |
87 | * Expand the shell escape by expanding unescaped !'s into the | |
88 | * last issued command where possible. | |
89 | */ | |
90 | ||
91 | char lastbang[128]; | |
92 | ||
93 | bangexp(str) | |
94 | char *str; | |
95 | { | |
96 | char bangbuf[BUFSIZ]; | |
97 | register char *cp, *cp2; | |
98 | register int n; | |
99 | int changed = 0; | |
100 | ||
101 | cp = str; | |
102 | cp2 = bangbuf; | |
103 | n = BUFSIZ; | |
104 | while (*cp) { | |
105 | if (*cp == '!') { | |
106 | if (n < strlen(lastbang)) { | |
107 | overf: | |
108 | printf("Command buffer overflow\n"); | |
109 | return(-1); | |
110 | } | |
111 | changed++; | |
112 | strcpy(cp2, lastbang); | |
113 | cp2 += strlen(lastbang); | |
114 | n -= strlen(lastbang); | |
115 | cp++; | |
116 | continue; | |
117 | } | |
118 | if (*cp == '\\' && cp[1] == '!') { | |
119 | if (--n <= 1) | |
120 | goto overf; | |
121 | *cp2++ = '!'; | |
122 | cp += 2; | |
123 | changed++; | |
124 | } | |
125 | if (--n <= 1) | |
126 | goto overf; | |
127 | *cp2++ = *cp++; | |
128 | } | |
129 | *cp2 = 0; | |
130 | if (changed) { | |
131 | printf("!%s\n", bangbuf); | |
132 | fflush(stdout); | |
133 | } | |
134 | strcpy(str, bangbuf); | |
135 | strncpy(lastbang, bangbuf, 128); | |
136 | lastbang[127] = 0; | |
137 | return(0); | |
138 | } | |
139 | ||
ca6bb034 KS |
140 | /* |
141 | * Print out a nice help message from some file or another. | |
142 | */ | |
143 | ||
144 | help() | |
145 | { | |
146 | register c; | |
147 | register FILE *f; | |
148 | ||
149 | if ((f = fopen(HELPFILE, "r")) == NULL) { | |
150 | printf("No help just now.\n"); | |
151 | return(1); | |
152 | } | |
153 | while ((c = getc(f)) != EOF) | |
154 | putchar(c); | |
155 | fclose(f); | |
156 | return(0); | |
157 | } | |
158 | ||
159 | /* | |
160 | * Change user's working directory. | |
161 | */ | |
162 | ||
163 | schdir(str) | |
164 | char *str; | |
165 | { | |
166 | register char *cp; | |
167 | ||
168 | for (cp = str; *cp == ' '; cp++) | |
169 | ; | |
170 | if (*cp == '\0') | |
171 | cp = homedir; | |
172 | else | |
173 | if ((cp = expand(cp)) == NOSTR) | |
174 | return(1); | |
175 | if (chdir(cp) < 0) { | |
176 | perror(cp); | |
177 | return(1); | |
178 | } | |
179 | return(0); | |
180 | } | |
181 | ||
182 | /* | |
183 | * Reply to a list of messages. Extract each name from the | |
184 | * message header and send them off to mail1() | |
185 | */ | |
186 | ||
187 | respond(msgvec) | |
188 | int *msgvec; | |
189 | { | |
190 | struct message *mp; | |
52984be9 | 191 | char *cp, buf[2 * LINESIZE], *rcv, *replyto; |
ca6bb034 KS |
192 | struct name *np; |
193 | struct header head; | |
194 | char *netmap(); | |
195 | ||
196 | if (msgvec[1] != 0) { | |
197 | printf("Sorry, can't reply to multiple messages at once\n"); | |
198 | return(1); | |
199 | } | |
200 | mp = &message[msgvec[0] - 1]; | |
201 | dot = mp; | |
fc8872bb | 202 | rcv = nameof(mp, 1); |
35bddd51 | 203 | replyto = skin(hfield("reply-to", mp)); |
ca6bb034 | 204 | strcpy(buf, ""); |
52984be9 KS |
205 | if (replyto != NOSTR) |
206 | strcpy(buf, replyto); | |
207 | else { | |
208 | cp = hfield("to", mp); | |
209 | if (cp != NOSTR) | |
210 | strcpy(buf, cp); | |
211 | } | |
ca6bb034 KS |
212 | np = elide(extract(buf, GTO)); |
213 | /* rcv = rename(rcv); */ | |
214 | mapf(np, rcv); | |
215 | np = delname(np, myname); | |
216 | head.h_seq = 1; | |
217 | cp = detract(np, 0); | |
52984be9 | 218 | if (cp != NOSTR && replyto == NOSTR) { |
ca6bb034 KS |
219 | strcpy(buf, cp); |
220 | strcat(buf, " "); | |
221 | strcat(buf, rcv); | |
222 | } | |
52984be9 KS |
223 | else { |
224 | if (cp == NOSTR && replyto != NOSTR) | |
225 | printf("Empty reply-to field -- replying to author\n"); | |
226 | if (cp == NOSTR) | |
227 | strcpy(buf, rcv); | |
228 | else | |
229 | strcpy(buf, cp); | |
230 | } | |
ca6bb034 KS |
231 | head.h_to = buf; |
232 | head.h_subject = hfield("subject", mp); | |
233 | if (head.h_subject == NOSTR) | |
234 | head.h_subject = hfield("subj", mp); | |
fc8872bb | 235 | head.h_subject = reedit(head.h_subject); |
ca6bb034 | 236 | head.h_cc = NOSTR; |
52984be9 KS |
237 | if (replyto == NOSTR) { |
238 | cp = hfield("cc", mp); | |
239 | if (cp != NOSTR) { | |
240 | np = elide(extract(cp, GCC)); | |
241 | mapf(np, rcv); | |
242 | np = delname(np, myname); | |
243 | head.h_cc = detract(np, 0); | |
244 | } | |
ca6bb034 KS |
245 | } |
246 | head.h_bcc = NOSTR; | |
247 | mail1(&head); | |
248 | return(0); | |
249 | } | |
250 | ||
fc8872bb KS |
251 | /* |
252 | * Modify the subject we are replying to to begin with Re: if | |
253 | * it does not already. | |
254 | */ | |
255 | ||
256 | char * | |
257 | reedit(subj) | |
258 | char *subj; | |
259 | { | |
260 | char sbuf[10]; | |
261 | register char *newsubj; | |
262 | ||
263 | if (subj == NOSTR) | |
264 | return(NOSTR); | |
265 | strncpy(sbuf, subj, 3); | |
266 | sbuf[3] = 0; | |
267 | if (icequal(sbuf, "re:")) | |
268 | return(subj); | |
269 | newsubj = salloc(strlen(subj) + 6); | |
270 | sprintf(newsubj, "Re: %s", subj); | |
271 | return(newsubj); | |
272 | } | |
273 | ||
ca6bb034 KS |
274 | /* |
275 | * Preserve the named messages, so that they will be sent | |
276 | * back to the system mailbox. | |
277 | */ | |
278 | ||
279 | preserve(msgvec) | |
280 | int *msgvec; | |
281 | { | |
282 | register struct message *mp; | |
283 | register int *ip, mesg; | |
284 | ||
285 | if (edit) { | |
286 | printf("Cannot \"preserve\" in edit mode\n"); | |
287 | return(1); | |
288 | } | |
289 | for (ip = msgvec; *ip != NULL; ip++) { | |
290 | mesg = *ip; | |
291 | mp = &message[mesg-1]; | |
292 | mp->m_flag |= MPRESERVE; | |
8fe58892 | 293 | mp->m_flag &= ~MBOX; |
ca6bb034 KS |
294 | dot = mp; |
295 | } | |
296 | return(0); | |
297 | } | |
298 | ||
299 | /* | |
300 | * Print the size of each message. | |
301 | */ | |
302 | ||
303 | messize(msgvec) | |
304 | int *msgvec; | |
305 | { | |
306 | register struct message *mp; | |
307 | register int *ip, mesg; | |
308 | ||
309 | for (ip = msgvec; *ip != NULL; ip++) { | |
310 | mesg = *ip; | |
311 | mp = &message[mesg-1]; | |
312 | printf("%d: %d\n", mesg, msize(mp)); | |
313 | } | |
314 | return(0); | |
315 | } | |
316 | ||
317 | /* | |
318 | * Quit quickly. If we are sourcing, just pop the input level | |
319 | * by returning an error. | |
320 | */ | |
321 | ||
322 | rexit(e) | |
323 | { | |
324 | if (sourcing) | |
325 | return(1); | |
326 | exit(e); | |
327 | } | |
328 | ||
329 | /* | |
330 | * Set or display a variable value. Syntax is similar to that | |
331 | * of csh. | |
332 | */ | |
333 | ||
334 | set(arglist) | |
335 | char **arglist; | |
336 | { | |
337 | register struct var *vp; | |
338 | register char *cp, *cp2; | |
339 | char varbuf[BUFSIZ], **ap, **p; | |
340 | int errs, h, s; | |
341 | ||
342 | if (argcount(arglist) == 0) { | |
343 | for (h = 0, s = 1; h < HSHSIZE; h++) | |
344 | for (vp = variables[h]; vp != NOVAR; vp = vp->v_link) | |
345 | s++; | |
346 | ap = (char **) salloc(s * sizeof *ap); | |
347 | for (h = 0, p = ap; h < HSHSIZE; h++) | |
348 | for (vp = variables[h]; vp != NOVAR; vp = vp->v_link) | |
349 | *p++ = vp->v_name; | |
350 | *p = NOSTR; | |
351 | sort(ap); | |
352 | for (p = ap; *p != NOSTR; p++) | |
353 | printf("%s\t%s\n", *p, value(*p)); | |
354 | return(0); | |
355 | } | |
356 | errs = 0; | |
357 | for (ap = arglist; *ap != NOSTR; ap++) { | |
358 | cp = *ap; | |
359 | cp2 = varbuf; | |
360 | while (*cp != '=' && *cp != '\0') | |
361 | *cp2++ = *cp++; | |
362 | *cp2 = '\0'; | |
363 | if (*cp == '\0') | |
364 | cp = ""; | |
365 | else | |
366 | cp++; | |
367 | if (equal(varbuf, "")) { | |
368 | printf("Non-null variable name required\n"); | |
369 | errs++; | |
370 | continue; | |
371 | } | |
372 | assign(varbuf, cp); | |
373 | } | |
374 | return(errs); | |
375 | } | |
376 | ||
377 | /* | |
378 | * Unset a bunch of variable values. | |
379 | */ | |
380 | ||
381 | unset(arglist) | |
382 | char **arglist; | |
383 | { | |
384 | register struct var *vp, *vp2; | |
385 | register char *cp; | |
386 | int errs, h; | |
387 | char **ap; | |
388 | ||
389 | errs = 0; | |
390 | for (ap = arglist; *ap != NOSTR; ap++) { | |
391 | if ((vp2 = lookup(*ap)) == NOVAR) { | |
392 | if (!sourcing) { | |
393 | printf("\"%s\": undefined variable\n", *ap); | |
394 | errs++; | |
395 | } | |
396 | continue; | |
397 | } | |
398 | h = hash(*ap); | |
399 | if (vp2 == variables[h]) { | |
400 | variables[h] = variables[h]->v_link; | |
401 | vfree(vp2->v_name); | |
402 | vfree(vp2->v_value); | |
403 | cfree(vp2); | |
404 | continue; | |
405 | } | |
406 | for (vp = variables[h]; vp->v_link != vp2; vp = vp->v_link) | |
407 | ; | |
408 | vp->v_link = vp2->v_link; | |
409 | vfree(vp2->v_name); | |
410 | vfree(vp2->v_value); | |
411 | cfree(vp2); | |
412 | } | |
413 | return(errs); | |
414 | } | |
415 | ||
416 | /* | |
417 | * Put add users to a group. | |
418 | */ | |
419 | ||
420 | group(argv) | |
421 | char **argv; | |
422 | { | |
423 | register struct grouphead *gh; | |
424 | register struct group *gp; | |
425 | register int h; | |
426 | int s; | |
427 | char **ap, *gname, **p; | |
428 | ||
429 | if (argcount(argv) == 0) { | |
430 | for (h = 0, s = 1; h < HSHSIZE; h++) | |
431 | for (gh = groups[h]; gh != NOGRP; gh = gh->g_link) | |
432 | s++; | |
433 | ap = (char **) salloc(s * sizeof *ap); | |
434 | for (h = 0, p = ap; h < HSHSIZE; h++) | |
435 | for (gh = groups[h]; gh != NOGRP; gh = gh->g_link) | |
436 | *p++ = gh->g_name; | |
437 | *p = NOSTR; | |
438 | sort(ap); | |
439 | for (p = ap; *p != NOSTR; p++) | |
440 | printgroup(*p); | |
441 | return(0); | |
442 | } | |
443 | if (argcount(argv) == 1) { | |
444 | printgroup(*argv); | |
445 | return(0); | |
446 | } | |
447 | gname = *argv; | |
448 | h = hash(gname); | |
449 | if ((gh = findgroup(gname)) == NOGRP) { | |
450 | gh = (struct grouphead *) calloc(sizeof *gh, 1); | |
451 | gh->g_name = vcopy(gname); | |
452 | gh->g_list = NOGE; | |
453 | gh->g_link = groups[h]; | |
454 | groups[h] = gh; | |
455 | } | |
456 | ||
457 | /* | |
458 | * Insert names from the command list into the group. | |
459 | * Who cares if there are duplicates? They get tossed | |
460 | * later anyway. | |
461 | */ | |
462 | ||
463 | for (ap = argv+1; *ap != NOSTR; ap++) { | |
464 | gp = (struct group *) calloc(sizeof *gp, 1); | |
465 | gp->ge_name = vcopy(*ap); | |
466 | gp->ge_link = gh->g_list; | |
467 | gh->g_list = gp; | |
468 | } | |
469 | return(0); | |
470 | } | |
471 | ||
472 | /* | |
473 | * Sort the passed string vecotor into ascending dictionary | |
474 | * order. | |
475 | */ | |
476 | ||
477 | sort(list) | |
478 | char **list; | |
479 | { | |
480 | register char **ap; | |
481 | int diction(); | |
482 | ||
483 | for (ap = list; *ap != NOSTR; ap++) | |
484 | ; | |
485 | if (ap-list < 2) | |
486 | return; | |
487 | qsort(list, ap-list, sizeof *list, diction); | |
488 | } | |
489 | ||
490 | /* | |
491 | * Do a dictionary order comparison of the arguments from | |
492 | * qsort. | |
493 | */ | |
494 | ||
495 | diction(a, b) | |
496 | register char **a, **b; | |
497 | { | |
498 | return(strcmp(*a, *b)); | |
499 | } | |
500 | ||
501 | /* | |
502 | * The do nothing command for comments. | |
503 | */ | |
504 | ||
505 | null(e) | |
506 | { | |
507 | return(0); | |
508 | } | |
509 | ||
510 | /* | |
1031a04a | 511 | * Print out the current edit file, if we are editing. |
ca6bb034 KS |
512 | * Otherwise, print the name of the person who's mail |
513 | * we are reading. | |
514 | */ | |
515 | ||
1031a04a KS |
516 | file(argv) |
517 | char **argv; | |
ca6bb034 KS |
518 | { |
519 | register char *cp; | |
1031a04a | 520 | char fname[BUFSIZ]; |
ca6bb034 | 521 | |
1031a04a | 522 | if (argv[0] == NOSTR) { |
890194fb | 523 | newfileinfo(); |
1031a04a KS |
524 | return(0); |
525 | } | |
526 | ||
527 | /* | |
528 | * Acker's! Must switch to the new file. | |
529 | * We use a funny interpretation -- | |
530 | * # -- gets the previous file | |
531 | * % -- gets the invoker's post office box | |
532 | * %user -- gets someone else's post office box | |
c953e015 | 533 | * & -- gets invoker's mbox file |
1031a04a KS |
534 | * string -- reads the given file |
535 | */ | |
536 | ||
537 | cp = getfilename(argv[0]); | |
538 | if (cp == NOSTR) | |
539 | return(-1); | |
540 | return(setfile(cp, 1)); | |
541 | } | |
542 | ||
543 | /* | |
544 | * Evaluate the string given as a new mailbox name. | |
545 | * Ultimately, we want this to support a number of meta characters. | |
546 | * Possibly: | |
547 | * % -- for my system mail box | |
548 | * %user -- for user's system mail box | |
549 | * # -- for previous file | |
c953e015 | 550 | * & -- get's invoker's mbox file |
1031a04a KS |
551 | * file name -- for any other file |
552 | */ | |
553 | ||
d344b00c | 554 | char prevfile[PATHSIZE]; |
c953e015 | 555 | |
1031a04a KS |
556 | char * |
557 | getfilename(name) | |
558 | char *name; | |
559 | { | |
560 | register char *cp; | |
c953e015 | 561 | char savename[BUFSIZ]; |
2b6cb640 | 562 | char oldmailname[BUFSIZ]; |
c953e015 KS |
563 | |
564 | switch (*name) { | |
565 | case '%': | |
d344b00c | 566 | strcpy(prevfile, mailname); |
c953e015 KS |
567 | if (name[1] != 0) { |
568 | strcpy(savename, myname); | |
2b6cb640 | 569 | strcpy(oldmailname, mailname); |
c953e015 KS |
570 | strncpy(myname, name+1, PATHSIZE-1); |
571 | myname[PATHSIZE-1] = 0; | |
572 | findmail(); | |
2b6cb640 | 573 | cp = savestr(mailname); |
c953e015 | 574 | strcpy(myname, savename); |
2b6cb640 | 575 | strcpy(mailname, oldmailname); |
c953e015 KS |
576 | return(cp); |
577 | } | |
2b6cb640 | 578 | strcpy(oldmailname, mailname); |
c953e015 | 579 | findmail(); |
2b6cb640 KS |
580 | cp = savestr(mailname); |
581 | strcpy(mailname, oldmailname); | |
582 | return(cp); | |
c953e015 KS |
583 | |
584 | case '#': | |
585 | if (name[1] != 0) | |
586 | goto regular; | |
587 | if (prevfile[0] == 0) { | |
588 | printf("No previous file\n"); | |
589 | return(NOSTR); | |
590 | } | |
2b6cb640 | 591 | cp = savestr(prevfile); |
d344b00c | 592 | strcpy(prevfile, mailname); |
2b6cb640 | 593 | return(cp); |
1031a04a | 594 | |
c953e015 | 595 | case '&': |
d344b00c | 596 | strcpy(prevfile, mailname); |
c953e015 KS |
597 | if (name[1] == 0) |
598 | return(mbox); | |
599 | /* Fall into . . . */ | |
600 | ||
601 | default: | |
602 | regular: | |
d344b00c | 603 | strcpy(prevfile, mailname); |
c953e015 KS |
604 | cp = expand(name); |
605 | return(cp); | |
606 | } | |
ca6bb034 KS |
607 | } |
608 | ||
609 | /* | |
610 | * Expand file names like echo | |
611 | */ | |
612 | ||
613 | echo(argv) | |
614 | char **argv; | |
615 | { | |
616 | register char **ap; | |
617 | register char *cp; | |
618 | ||
619 | for (ap = argv; *ap != NOSTR; ap++) { | |
620 | cp = *ap; | |
621 | if ((cp = expand(cp)) != NOSTR) | |
9e60d092 | 622 | printf("%s ", cp); |
ca6bb034 KS |
623 | } |
624 | return(0); | |
625 | } | |
626 | ||
627 | /* | |
628 | * Reply to a series of messages by simply mailing to the senders | |
629 | * and not messing around with the To: and Cc: lists as in normal | |
630 | * reply. | |
631 | */ | |
632 | ||
633 | Respond(msgvec) | |
634 | int msgvec[]; | |
635 | { | |
636 | struct header head; | |
637 | struct message *mp; | |
638 | register int s, *ap; | |
639 | register char *cp, *subject; | |
640 | ||
641 | for (s = 0, ap = msgvec; *ap != 0; ap++) { | |
642 | mp = &message[*ap - 1]; | |
643 | dot = mp; | |
35bddd51 | 644 | s += strlen(nameof(mp, 2)) + 1; |
ca6bb034 KS |
645 | } |
646 | if (s == 0) | |
647 | return(0); | |
648 | cp = salloc(s + 2); | |
649 | head.h_to = cp; | |
650 | for (ap = msgvec; *ap != 0; ap++) { | |
651 | mp = &message[*ap - 1]; | |
35bddd51 | 652 | cp = copy(nameof(mp, 2), cp); |
ca6bb034 KS |
653 | *cp++ = ' '; |
654 | } | |
655 | *--cp = 0; | |
656 | mp = &message[msgvec[0] - 1]; | |
657 | subject = hfield("subject", mp); | |
658 | head.h_seq = 0; | |
659 | if (subject == NOSTR) | |
660 | subject = hfield("subj", mp); | |
fc8872bb | 661 | head.h_subject = reedit(subject); |
ca6bb034 KS |
662 | if (subject != NOSTR) |
663 | head.h_seq++; | |
664 | head.h_cc = NOSTR; | |
665 | head.h_bcc = NOSTR; | |
666 | mail1(&head); | |
667 | return(0); | |
668 | } | |
d344b00c KS |
669 | |
670 | /* | |
671 | * Conditional commands. These allow one to parameterize one's | |
672 | * .mailrc and do some things if sending, others if receiving. | |
673 | */ | |
674 | ||
675 | ifcmd(argv) | |
676 | char **argv; | |
677 | { | |
678 | register char *cp; | |
679 | ||
680 | if (cond != CANY) { | |
681 | printf("Illegal nested \"if\"\n"); | |
682 | return(1); | |
683 | } | |
684 | cond = CANY; | |
685 | cp = argv[0]; | |
686 | switch (*cp) { | |
687 | case 'r': case 'R': | |
688 | cond = CRCV; | |
689 | break; | |
690 | ||
691 | case 's': case 'S': | |
692 | cond = CSEND; | |
693 | break; | |
694 | ||
695 | default: | |
696 | printf("Unrecognized if-keyword: \"%s\"\n", cp); | |
697 | return(1); | |
698 | } | |
699 | return(0); | |
700 | } | |
701 | ||
702 | /* | |
703 | * Implement 'else'. This is pretty simple -- we just | |
704 | * flip over the conditional flag. | |
705 | */ | |
706 | ||
707 | elsecmd() | |
708 | { | |
709 | ||
710 | switch (cond) { | |
711 | case CANY: | |
712 | printf("\"Else\" without matching \"if\"\n"); | |
713 | return(1); | |
714 | ||
715 | case CSEND: | |
716 | cond = CRCV; | |
717 | break; | |
718 | ||
719 | case CRCV: | |
720 | cond = CSEND; | |
721 | break; | |
722 | ||
723 | default: | |
724 | printf("Mail's idea of conditions is screwed up\n"); | |
725 | cond = CANY; | |
726 | break; | |
727 | } | |
728 | return(0); | |
729 | } | |
730 | ||
731 | /* | |
732 | * End of if statement. Just set cond back to anything. | |
733 | */ | |
734 | ||
735 | endifcmd() | |
736 | { | |
737 | ||
738 | if (cond == CANY) { | |
739 | printf("\"Endif\" without matching \"if\"\n"); | |
740 | return(1); | |
741 | } | |
742 | cond = CANY; | |
743 | return(0); | |
744 | } |