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Fix typo in man page
[nmh] / uip / mhlsbr.c
1
2 /*
3 * mhlsbr.c -- main routines for nmh message lister
4 *
5 * This code is Copyright (c) 2002, by the authors of nmh. See the
6 * COPYRIGHT file in the root directory of the nmh distribution for
7 * complete copyright information.
8 */
9
10 #include <h/mh.h>
11 #include <h/signals.h>
12 #include <h/addrsbr.h>
13 #include <h/fmt_scan.h>
14 #include <h/tws.h>
15 #include <h/utils.h>
16 #include <setjmp.h>
17 #include <sys/types.h>
18
19 /*
20 * MAJOR BUG:
21 * for a component containing addresses, ADDRFMT, if COMPRESS is also
22 * set, then addresses get split wrong (not at the spaces between commas).
23 * To fix this correctly, putstr() should know about "atomic" strings that
24 * must NOT be broken across lines. That's too difficult for right now
25 * (it turns out that there are a number of degernate cases), so in
26 * oneline(), instead of
27 *
28 * (*onelp == '\n' && !onelp[1])
29 *
30 * being a terminating condition,
31 *
32 * (*onelp == '\n' && (!onelp[1] || (flags & ADDRFMT)))
33 *
34 * is used instead. This cuts the line prematurely, and gives us a much
35 * better chance of getting things right.
36 */
37
38 #define ONECOMP 0
39 #define TWOCOMP 1
40 #define BODYCOMP 2
41
42 #define QUOTE '\\'
43
44 #define MHL_SWITCHES \
45 X("bell", 0, BELLSW) \
46 X("nobell", 0, NBELLSW) \
47 X("clear", 0, CLRSW) \
48 X("noclear", 0, NCLRSW) \
49 X("folder +folder", 0, FOLDSW) \
50 X("form formfile", 0, FORMSW) \
51 X("moreproc program", 0, PROGSW) \
52 X("nomoreproc", 0, NPROGSW) \
53 X("length lines", 0, LENSW) \
54 X("width columns", 0, WIDTHSW) \
55 X("sleep seconds", 0, SLEEPSW) \
56 X("dashstuffing", -12, BITSTUFFSW) /* interface from forw */ \
57 X("nodashstuffing", -14, NBITSTUFFSW) /* interface from forw */ \
58 X("version", 0, VERSIONSW) \
59 X("help", 0, HELPSW) \
60 X("forward", -7, FORW1SW) /* interface from forw */ \
61 X("forwall", -7, FORW2SW) /* interface from forw */ \
62 X("digest list", -6, DGSTSW) \
63 X("volume number", -6, VOLUMSW) \
64 X("issue number", -5, ISSUESW) \
65 X("nobody", -6, NBODYSW) \
66 X("fmtproc program", 0, FMTPROCSW) \
67 X("nofmtproc", 0, NFMTPROCSW) \
68
69 #define X(sw, minchars, id) id,
70 DEFINE_SWITCH_ENUM(MHL);
71 #undef X
72
73 #define X(sw, minchars, id) { sw, minchars, id },
74 DEFINE_SWITCH_ARRAY(MHL, mhlswitches);
75 #undef X
76
77 #define NOCOMPONENT 0x000001 /* don't show component name */
78 #define UPPERCASE 0x000002 /* display in all upper case */
79 #define CENTER 0x000004 /* center line */
80 #define CLEARTEXT 0x000008 /* cleartext */
81 #define EXTRA 0x000010 /* an "extra" component */
82 #define HDROUTPUT 0x000020 /* already output */
83 #define CLEARSCR 0x000040 /* clear screen */
84 #define LEFTADJUST 0x000080 /* left justify multiple lines */
85 #define COMPRESS 0x000100 /* compress text */
86 #define ADDRFMT 0x000200 /* contains addresses */
87 #define BELL 0x000400 /* sound bell at EOP */
88 #define DATEFMT 0x000800 /* contains dates */
89 #define FORMAT 0x001000 /* parse address/date/RFC-2047 field */
90 #define INIT 0x002000 /* initialize component */
91 #define SPLIT 0x010000 /* split headers (don't concatenate) */
92 #define NONEWLINE 0x020000 /* don't write trailing newline */
93 #define NOWRAP 0x040000 /* Don't wrap lines ever */
94 #define FMTFILTER 0x080000 /* Filter through format filter */
95 #define LBITS "\020\01NOCOMPONENT\02UPPERCASE\03CENTER\04CLEARTEXT\05EXTRA\06HDROUTPUT\07CLEARSCR\010LEFTADJUST\011COMPRESS\012ADDRFMT\013BELL\014DATEFMT\015FORMAT\016INIT\021SPLIT\022NONEWLINE\023NOWRAP\024FMTFILTER"
96 #define GFLAGS (NOCOMPONENT | UPPERCASE | CENTER | LEFTADJUST | COMPRESS | SPLIT | NOWRAP)
97
98 /*
99 * A format string to be used as a command-line argument to the body
100 * format filter.
101 */
102
103 struct arglist {
104 struct format *a_fmt;
105 char *a_nfs;
106 struct arglist *a_next;
107 };
108
109 /*
110 * Linked list of command line arguments for the body format filter. This
111 * USED to be in "struct mcomp", but the format API got cleaned up and even
112 * though it reduced the code we had to do, it make things more complicated
113 * for us. Specifically:
114 *
115 * - The interface to the hash table has been cleaned up, which means the
116 * rooting around in the hash table is no longer necessary (yay!). But
117 * this ALSO means that we have to make sure that we call our format
118 * compilation routines before we process the message, because the
119 * components need to be visible in the hash table so we can save them for
120 * later. So we moved them out of "mcomp" and now compile them right before
121 * header processing starts.
122 * - We also use format strings to handle other components in the mhl
123 * configuration (using "formatfield" and "decode"), but here life
124 * gets complicated: they aren't dealt with in the normal way. Instead
125 * of referring to a component like {from}, each component is processed
126 * using the special {text} component. But these format strings need to be
127 * compiled BEFORE we compile the format arguments; in the previous
128 * implementation they were compiled and scanned as the headers were
129 * read, and that would reset the hash table that we need to populate
130 * the components used by the body format filter. So we are compiling
131 * the formatfield component strings ahead of time and then scanning them
132 * later.
133 *
134 * Okay, fine ... this was broken before. But you know what? Fixing this
135 * the right way will make things easier down the road.
136 *
137 * One side-effect to this change: format strings are now compiled only once
138 * for components specified with "formatfield", but they are compiled for
139 * every message for format arguments.
140 */
141
142 static struct arglist *arglist_head;
143 static struct arglist *arglist_tail;
144 static int filter_nargs = 0;
145
146 /*
147 * Flags/options for each component
148 */
149
150 struct mcomp {
151 char *c_name; /* component name */
152 char *c_text; /* component text */
153 char *c_ovtxt; /* text overflow indicator */
154 char *c_nfs; /* iff FORMAT */
155 struct format *c_fmt; /* .. */
156 struct comp *c_c_text; /* Ref to {text} in FORMAT */
157 struct comp *c_c_error; /* Ref to {error} */
158 int c_offset; /* left margin indentation */
159 int c_ovoff; /* overflow indentation */
160 int c_width; /* width of field */
161 int c_cwidth; /* width of component */
162 int c_length; /* length in lines */
163 long c_flags;
164 struct mcomp *c_next;
165 };
166
167 static struct mcomp *msghd = NULL;
168 static struct mcomp *msgtl = NULL;
169 static struct mcomp *fmthd = NULL;
170 static struct mcomp *fmttl = NULL;
171
172 static struct mcomp global = {
173 NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0, -1, 80, -1, 40, BELL, NULL
174 };
175
176 static struct mcomp holder = {
177 NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0, 0, 0, 0, 0, NOCOMPONENT, NULL
178 };
179
180 struct pair {
181 char *p_name;
182 long p_flags;
183 };
184
185 static struct pair pairs[] = {
186 { "Date", DATEFMT },
187 { "From", ADDRFMT },
188 { "Sender", ADDRFMT },
189 { "Reply-To", ADDRFMT },
190 { "To", ADDRFMT },
191 { "cc", ADDRFMT },
192 { "Bcc", ADDRFMT },
193 { "Resent-Date", DATEFMT },
194 { "Resent-From", ADDRFMT },
195 { "Resent-Sender", ADDRFMT },
196 { "Resent-Reply-To", ADDRFMT },
197 { "Resent-To", ADDRFMT },
198 { "Resent-cc", ADDRFMT },
199 { "Resent-Bcc", ADDRFMT },
200 { NULL, 0 }
201 };
202
203 struct triple {
204 char *t_name;
205 long t_on;
206 long t_off;
207 };
208
209 static struct triple triples[] = {
210 { "nocomponent", NOCOMPONENT, 0 },
211 { "uppercase", UPPERCASE, 0 },
212 { "nouppercase", 0, UPPERCASE },
213 { "center", CENTER, 0 },
214 { "nocenter", 0, CENTER },
215 { "clearscreen", CLEARSCR, 0 },
216 { "noclearscreen", 0, CLEARSCR },
217 { "noclear", 0, CLEARSCR },
218 { "leftadjust", LEFTADJUST, 0 },
219 { "noleftadjust", 0, LEFTADJUST },
220 { "compress", COMPRESS, 0 },
221 { "nocompress", 0, COMPRESS },
222 { "split", SPLIT, 0 },
223 { "nosplit", 0, SPLIT },
224 { "addrfield", ADDRFMT, DATEFMT },
225 { "bell", BELL, 0 },
226 { "nobell", 0, BELL },
227 { "datefield", DATEFMT, ADDRFMT },
228 { "newline", 0, NONEWLINE },
229 { "nonewline", NONEWLINE, 0 },
230 { "wrap", 0, NOWRAP },
231 { "nowrap", NOWRAP, 0 },
232 { "format", FMTFILTER, 0 },
233 { "noformat", 0, FMTFILTER },
234 { NULL, 0, 0 }
235 };
236
237 static char *addrcomps[] = {
238 "from",
239 "sender",
240 "reply-to",
241 "to",
242 "cc",
243 "bcc",
244 "resent-from",
245 "resent-sender",
246 "resent-reply-to",
247 "resent-to",
248 "resent-cc",
249 "resent-bcc",
250 NULL
251 };
252
253
254 static int bellflg = 0;
255 static int clearflg = 0;
256 static int dashstuff = 0;
257 static int dobody = 1;
258 static int forwflg = 0;
259 static int forwall = 0;
260
261 static int sleepsw = NOTOK;
262
263 static char *digest = NULL;
264 static int volume = 0;
265 static int issue = 0;
266
267 static int exitstat = 0;
268 static int mhldebug = 0;
269
270 static int filesize = 0;
271
272 #define PITTY (-1)
273 #define NOTTY 0
274 #define ISTTY 1
275 static int ontty = NOTTY;
276
277 static int row;
278 static unsigned int column;
279
280 static int lm;
281 static int llim;
282 static int ovoff;
283 static int term;
284 static unsigned int wid;
285
286 static char *ovtxt;
287
288 static char *onelp;
289
290 static char *parptr;
291
292 static int num_ignores = 0;
293 static char *ignores[MAXARGS];
294
295 static jmp_buf env;
296 static jmp_buf mhlenv;
297
298 static char delim3[] = /* from forw.c */
299 "\n----------------------------------------------------------------------\n\n";
300 static char delim4[] = "\n------------------------------\n\n";
301
302 static FILE *(*mhl_action) () = (FILE *(*) ()) 0;
303
304 /*
305 * Redefine a couple of functions.
306 * These are undefined later in the code.
307 */
308 #define adios mhladios
309 #define done mhldone
310
311 /*
312 * prototypes
313 */
314 static void mhl_format (char *, int, int);
315 static int evalvar (struct mcomp *);
316 static int ptoi (char *, int *);
317 static int ptos (char *, char **);
318 static char *parse (void);
319 static void process (char *, char *, int, int);
320 static void mhlfile (FILE *, char *, int, int);
321 static int mcomp_flags (char *);
322 static char *mcomp_add (long, char *, char *);
323 static void mcomp_format (struct mcomp *, struct mcomp *);
324 static struct mcomp *add_queue (struct mcomp **, struct mcomp **, char *, char *, int);
325 static void free_queue (struct mcomp **, struct mcomp **);
326 static void putcomp (struct mcomp *, struct mcomp *, int);
327 static char *oneline (char *, long);
328 static void putstr (char *, long);
329 static void putch (char, long);
330 static void intrser (int);
331 static void pipeser (int);
332 static void quitser (int);
333 static void mhladios (char *, char *, ...);
334 static void mhldone (int);
335 static void filterbody (struct mcomp *, char *, int, int, FILE *,
336 m_getfld_state_t);
337 static void compile_formatfield(struct mcomp *);
338 static void compile_filterargs (void);
339
340
341 int
342 mhl (int argc, char **argv)
343 {
344 int length = 0, nomore = 0;
345 unsigned int i, vecp = 0;
346 int width = 0;
347 char *cp, *folder = NULL, *form = NULL;
348 char buf[BUFSIZ], *files[MAXARGS];
349 char **argp, **arguments;
350
351 /* Need this if called from main() of show(1). */
352 invo_name = r1bindex (argv[0], '/');
353
354 arguments = getarguments (invo_name, argc, argv, 1);
355 argp = arguments;
356
357 if ((cp = getenv ("MHLDEBUG")) && *cp)
358 mhldebug++;
359
360 while ((cp = *argp++)) {
361 if (*cp == '-') {
362 switch (smatch (++cp, mhlswitches)) {
363 case AMBIGSW:
364 ambigsw (cp, mhlswitches);
365 done (1);
366 case UNKWNSW:
367 adios (NULL, "-%s unknown\n", cp);
368
369 case HELPSW:
370 snprintf (buf, sizeof(buf), "%s [switches] [files ...]", invo_name);
371 print_help (buf, mhlswitches, 1);
372 done (0);
373 case VERSIONSW:
374 print_version(invo_name);
375 done (0);
376
377 case BELLSW:
378 bellflg = 1;
379 continue;
380 case NBELLSW:
381 bellflg = -1;
382 continue;
383
384 case CLRSW:
385 clearflg = 1;
386 continue;
387 case NCLRSW:
388 clearflg = -1;
389 continue;
390
391 case FOLDSW:
392 if (!(folder = *argp++) || *folder == '-')
393 adios (NULL, "missing argument to %s", argp[-2]);
394 continue;
395 case FORMSW:
396 if (!(form = *argp++) || *form == '-')
397 adios (NULL, "missing argument to %s", argp[-2]);
398 continue;
399
400 case SLEEPSW:
401 if (!(cp = *argp++) || *cp == '-')
402 adios (NULL, "missing argument to %s", argp[-2]);
403 sleepsw = atoi (cp);/* ZERO ok! */
404 continue;
405
406 case PROGSW:
407 if (!(moreproc = *argp++) || *moreproc == '-')
408 adios (NULL, "missing argument to %s", argp[-2]);
409 continue;
410 case NPROGSW:
411 nomore++;
412 continue;
413
414 case FMTPROCSW:
415 if (!(formatproc = *argp++) || *formatproc == '-')
416 adios (NULL, "missing argument to %s", argp[-2]);
417 continue;
418 case NFMTPROCSW:
419 formatproc = NULL;
420 continue;
421
422 case LENSW:
423 if (!(cp = *argp++) || *cp == '-')
424 adios (NULL, "missing argument to %s", argp[-2]);
425 if ((length = atoi (cp)) < 1)
426 adios (NULL, "bad argument %s %s", argp[-2], cp);
427 continue;
428 case WIDTHSW:
429 if (!(cp = *argp++) || *cp == '-')
430 adios (NULL, "missing argument to %s", argp[-2]);
431 if ((width = atoi (cp)) < 1)
432 adios (NULL, "bad argument %s %s", argp[-2], cp);
433 continue;
434
435 case DGSTSW:
436 if (!(digest = *argp++) || *digest == '-')
437 adios (NULL, "missing argument to %s", argp[-2]);
438 continue;
439 case ISSUESW:
440 if (!(cp = *argp++) || *cp == '-')
441 adios (NULL, "missing argument to %s", argp[-2]);
442 if ((issue = atoi (cp)) < 1)
443 adios (NULL, "bad argument %s %s", argp[-2], cp);
444 continue;
445 case VOLUMSW:
446 if (!(cp = *argp++) || *cp == '-')
447 adios (NULL, "missing argument to %s", argp[-2]);
448 if ((volume = atoi (cp)) < 1)
449 adios (NULL, "bad argument %s %s", argp[-2], cp);
450 continue;
451
452 case FORW2SW:
453 forwall++; /* fall */
454 case FORW1SW:
455 forwflg++;
456 clearflg = -1;/* XXX */
457 continue;
458
459 case BITSTUFFSW:
460 dashstuff = 1; /* trinary logic */
461 continue;
462 case NBITSTUFFSW:
463 dashstuff = -1; /* trinary logic */
464 continue;
465
466 case NBODYSW:
467 dobody = 0;
468 continue;
469 }
470 }
471 files[vecp++] = cp;
472 }
473
474 if (!folder)
475 folder = getenv ("mhfolder");
476
477 if (isatty (fileno (stdout))) {
478 if (!nomore && moreproc && *moreproc != '\0') {
479 if (mhl_action) {
480 SIGNAL (SIGINT, SIG_IGN);
481 SIGNAL2 (SIGQUIT, quitser);
482 }
483 SIGNAL2 (SIGPIPE, pipeser);
484 m_popen (moreproc, mhl_action != NULL);
485 ontty = PITTY;
486 } else {
487 SIGNAL (SIGINT, SIG_IGN);
488 SIGNAL2 (SIGQUIT, quitser);
489 ontty = ISTTY;
490 }
491 } else {
492 ontty = NOTTY;
493 }
494
495 mhl_format (form ? form : mhlformat, length, width);
496
497 if (vecp == 0) {
498 process (folder, NULL, 1, vecp = 1);
499 } else {
500 for (i = 0; i < vecp; i++)
501 process (folder, files[i], i + 1, vecp);
502 }
503
504 if (forwall) {
505 if (digest) {
506 printf ("%s", delim4);
507 if (volume == 0) {
508 snprintf (buf, sizeof(buf), "End of %s Digest\n", digest);
509 } else {
510 snprintf (buf, sizeof(buf), "End of %s Digest [Volume %d Issue %d]\n",
511 digest, volume, issue);
512 }
513 i = strlen (buf);
514 for (cp = buf + i; i > 1; i--)
515 *cp++ = '*';
516 *cp++ = '\n';
517 *cp = 0;
518 printf ("%s", buf);
519 }
520 else
521 printf ("\n------- End of Forwarded Message%s\n",
522 vecp > 1 ? "s" : "");
523 }
524
525 fflush(stdout);
526 if(ferror(stdout)){
527 adios("output", "error writing");
528 }
529
530 if (clearflg > 0 && ontty == NOTTY)
531 nmh_clear_screen ();
532
533 if (ontty == PITTY)
534 m_pclose ();
535
536 return exitstat;
537 }
538
539
540 static void
541 mhl_format (char *file, int length, int width)
542 {
543 int i;
544 char *bp, *cp, **ip;
545 char *ap, name[NAMESZ];
546 struct mcomp *c1;
547 struct stat st;
548 FILE *fp;
549 static dev_t dev = 0;
550 static ino_t ino = 0;
551 static time_t mtime = 0;
552
553 if (fmthd != NULL) {
554 if (stat (etcpath (file), &st) != NOTOK
555 && mtime == st.st_mtime
556 && dev == st.st_dev
557 && ino == st.st_ino)
558 goto out;
559 else
560 free_queue (&fmthd, &fmttl);
561 }
562
563 if ((fp = fopen (etcpath (file), "r")) == NULL)
564 adios (file, "unable to open format file");
565
566 if (fstat (fileno (fp), &st) != NOTOK) {
567 mtime = st.st_mtime;
568 dev = st.st_dev;
569 ino = st.st_ino;
570 }
571
572 global.c_ovtxt = global.c_nfs = NULL;
573 global.c_fmt = NULL;
574 global.c_offset = 0;
575 global.c_ovoff = -1;
576 if ((i = sc_width ()) > 5)
577 global.c_width = i;
578 global.c_cwidth = -1;
579 if ((i = sc_length ()) > 5)
580 global.c_length = i - 1;
581 global.c_flags = BELL; /* BELL is default */
582 *(ip = ignores) = NULL;
583 filter_nargs = 0;
584
585 while (vfgets (fp, &ap) == OK) {
586 bp = ap;
587 if (*bp == ';')
588 continue;
589
590 if ((cp = strchr(bp, '\n')))
591 *cp = 0;
592
593 if (*bp == ':') {
594 c1 = add_queue (&fmthd, &fmttl, NULL, bp + 1, CLEARTEXT);
595 continue;
596 }
597
598 parptr = bp;
599 strncpy (name, parse(), sizeof(name));
600 switch (*parptr) {
601 case '\0':
602 case ',':
603 case '=':
604 /*
605 * Split this list of fields to ignore, and copy
606 * it to the end of the current "ignores" list.
607 */
608 if (!strcasecmp (name, "ignores")) {
609 char **tmparray, **p;
610 int n = 0;
611
612 /* split the fields */
613 tmparray = brkstring (getcpy (++parptr), ",", NULL);
614
615 /* count number of fields split */
616 p = tmparray;
617 while (*p++)
618 n++;
619
620 /* copy pointers to split fields to ignores array */
621 ip = copyip (tmparray, ip, MAXARGS - num_ignores);
622 num_ignores += n;
623 continue;
624 }
625 parptr = bp;
626 while (*parptr) {
627 if (evalvar (&global))
628 adios (NULL, "format file syntax error: %s", bp);
629 if (*parptr)
630 parptr++;
631 }
632 continue;
633
634 case ':':
635 c1 = add_queue (&fmthd, &fmttl, name, NULL, INIT);
636 while (*parptr == ':' || *parptr == ',') {
637 parptr++;
638 if (evalvar (c1))
639 adios (NULL, "format file syntax error: %s", bp);
640 }
641 if (!c1->c_nfs && global.c_nfs) {
642 if (c1->c_flags & DATEFMT) {
643 if (global.c_flags & DATEFMT) {
644 c1->c_nfs = getcpy (global.c_nfs);
645 compile_formatfield(c1);
646 }
647 }
648 else
649 if (c1->c_flags & ADDRFMT) {
650 if (global.c_flags & ADDRFMT) {
651 c1->c_nfs = getcpy (global.c_nfs);
652 compile_formatfield(c1);
653 }
654 }
655 }
656 continue;
657
658 default:
659 adios (NULL, "format file syntax error: %s", bp);
660 }
661 }
662 fclose (fp);
663
664 if (mhldebug) {
665 for (c1 = fmthd; c1; c1 = c1->c_next) {
666 char buffer[BUFSIZ];
667
668 fprintf (stderr, "c1: name=\"%s\" text=\"%s\" ovtxt=\"%s\"\n",
669 c1->c_name, c1->c_text, c1->c_ovtxt);
670 fprintf (stderr, "\tnfs=0x%x fmt=0x%x\n",
671 (unsigned int)(unsigned long) c1->c_nfs,
672 (unsigned int)(unsigned long) c1->c_fmt);
673 fprintf (stderr, "\toffset=%d ovoff=%d width=%d cwidth=%d length=%d\n",
674 c1->c_offset, c1->c_ovoff, c1->c_width,
675 c1->c_cwidth, c1->c_length);
676 fprintf (stderr, "\tflags=%s\n",
677 snprintb (buffer, sizeof(buffer), (unsigned) c1->c_flags, LBITS));
678 }
679 }
680
681 out:
682 if (clearflg == 1) {
683 global.c_flags |= CLEARSCR;
684 } else {
685 if (clearflg == -1)
686 global.c_flags &= ~CLEARSCR;
687 }
688
689 switch (bellflg) { /* command line may override format file */
690 case 1:
691 global.c_flags |= BELL;
692 break;
693 case -1:
694 global.c_flags &= ~BELL;
695 break;
696 }
697
698 if (length)
699 global.c_length = length;
700 if (width)
701 global.c_width = width;
702 if (global.c_length < 5)
703 global.c_length = 10000;
704 if (global.c_width < 5)
705 global.c_width = 10000;
706 }
707
708
709 static int
710 evalvar (struct mcomp *c1)
711 {
712 char *cp, name[NAMESZ];
713 struct triple *ap;
714
715 if (!*parptr)
716 return 0;
717 strncpy (name, parse(), sizeof(name));
718
719 if (!strcasecmp (name, "component")) {
720 if (ptos (name, &c1->c_text))
721 return 1;
722 c1->c_flags &= ~NOCOMPONENT;
723 return 0;
724 }
725
726 if (!strcasecmp (name, "overflowtext"))
727 return ptos (name, &c1->c_ovtxt);
728
729 if (!strcasecmp (name, "formatfield")) {
730 if (ptos (name, &cp))
731 return 1;
732 c1->c_nfs = getcpy (new_fs (NULL, NULL, cp));
733 compile_formatfield(c1);
734 c1->c_flags |= FORMAT;
735 return 0;
736 }
737
738 if (!strcasecmp (name, "decode")) {
739 c1->c_nfs = getcpy (new_fs (NULL, NULL, "%(decode{text})"));
740 compile_formatfield(c1);
741 c1->c_flags |= FORMAT;
742 return 0;
743 }
744
745 if (!strcasecmp (name, "offset"))
746 return ptoi (name, &c1->c_offset);
747 if (!strcasecmp (name, "overflowoffset"))
748 return ptoi (name, &c1->c_ovoff);
749 if (!strcasecmp (name, "width"))
750 return ptoi (name, &c1->c_width);
751 if (!strcasecmp (name, "compwidth"))
752 return ptoi (name, &c1->c_cwidth);
753 if (!strcasecmp (name, "length"))
754 return ptoi (name, &c1->c_length);
755 if (!strcasecmp (name, "nodashstuffing"))
756 return (dashstuff = -1);
757
758 for (ap = triples; ap->t_name; ap++)
759 if (!strcasecmp (ap->t_name, name)) {
760 c1->c_flags |= ap->t_on;
761 c1->c_flags &= ~ap->t_off;
762 return 0;
763 }
764
765 if (!strcasecmp (name, "formatarg")) {
766 struct arglist *args;
767
768 if (ptos (name, &cp))
769 return 1;
770
771 if (! c1->c_name || strcasecmp (c1->c_name, "body")) {
772 advise (NULL, "format filters are currently only supported on "
773 "the \"body\" component");
774 return 1;
775 }
776
777 args = (struct arglist *) calloc((size_t) 1, sizeof(struct arglist));
778
779 if (arglist_tail)
780 arglist_tail->a_next = args;
781
782 arglist_tail = args;
783
784 if (! arglist_head)
785 arglist_head = args;
786
787 args->a_nfs = getcpy (new_fs (NULL, NULL, cp));
788 filter_nargs++;
789
790 return 0;
791 }
792
793 return 1;
794 }
795
796
797 static int
798 ptoi (char *name, int *i)
799 {
800 char *cp;
801
802 if (*parptr++ != '=' || !*(cp = parse ())) {
803 advise (NULL, "missing argument to variable %s", name);
804 return 1;
805 }
806
807 *i = atoi (cp);
808 return 0;
809 }
810
811
812 static int
813 ptos (char *name, char **s)
814 {
815 char c, *cp;
816
817 if (*parptr++ != '=') {
818 advise (NULL, "missing argument to variable %s", name);
819 return 1;
820 }
821
822 if (*parptr != '"') {
823 for (cp = parptr;
824 *parptr && *parptr != ':' && *parptr != ',';
825 parptr++)
826 continue;
827 } else {
828 for (cp = ++parptr; *parptr && *parptr != '"'; parptr++)
829 if (*parptr == QUOTE)
830 if (!*++parptr)
831 parptr--;
832 }
833 c = *parptr;
834 *parptr = 0;
835 *s = getcpy (cp);
836 if ((*parptr = c) == '"')
837 parptr++;
838 return 0;
839 }
840
841
842 static char *
843 parse (void)
844 {
845 int c;
846 char *cp;
847 static char result[NAMESZ];
848
849 for (cp = result; *parptr && (cp - result < NAMESZ); parptr++) {
850 c = *parptr;
851 if (isalnum (c)
852 || c == '.'
853 || c == '-'
854 || c == '_'
855 || c =='['
856 || c == ']')
857 *cp++ = c;
858 else
859 break;
860 }
861 *cp = '\0';
862
863 return result;
864 }
865
866
867 /*
868 * Process one file/message
869 */
870
871 static void
872 process (char *folder, char *fname, int ofilen, int ofilec)
873 {
874 char *cp = NULL;
875 FILE *fp = NULL;
876 struct mcomp *c1;
877 struct stat st;
878 struct arglist *ap;
879 /* volatile to prevent "might be clobbered" warning from gcc: */
880 char *volatile fname2 = fname ? fname : "(stdin)";
881
882 switch (setjmp (env)) {
883 case OK:
884 if (fname) {
885 fp = mhl_action ? (*mhl_action) (fname) : fopen (fname, "r");
886 if (fp == NULL) {
887 advise (fname, "unable to open");
888 exitstat++;
889 return;
890 }
891 } else {
892 fp = stdin;
893 }
894 if (fstat(fileno(fp), &st) == 0) {
895 filesize = st.st_size;
896 } else {
897 filesize = 0;
898 }
899 cp = folder ? concat (folder, ":", fname2, NULL) : getcpy (fname2);
900 if (ontty != PITTY)
901 SIGNAL (SIGINT, intrser);
902 mhlfile (fp, cp, ofilen, ofilec); /* FALL THROUGH! */
903
904 for (ap = arglist_head; ap; ap = ap->a_next) {
905 fmt_free(ap->a_fmt, 0);
906 ap->a_fmt = NULL;
907 }
908
909 if (arglist_head)
910 fmt_free(NULL, 1);
911
912 default:
913 if (ontty != PITTY)
914 SIGNAL (SIGINT, SIG_IGN);
915 if (mhl_action == NULL && fp != stdin)
916 fclose (fp);
917 free (cp);
918 if (holder.c_text) {
919 free (holder.c_text);
920 holder.c_text = NULL;
921 }
922 free_queue (&msghd, &msgtl);
923 for (c1 = fmthd; c1; c1 = c1->c_next)
924 c1->c_flags &= ~HDROUTPUT;
925 break;
926 }
927
928 }
929
930
931 static void
932 mhlfile (FILE *fp, char *mname, int ofilen, int ofilec)
933 {
934 int state, bucket;
935 struct mcomp *c1, *c2, *c3;
936 char **ip, name[NAMESZ], buf[BUFSIZ];
937 m_getfld_state_t gstate = 0;
938
939 compile_filterargs();
940
941 if (forwall) {
942 if (digest)
943 printf ("%s", ofilen == 1 ? delim3 : delim4);
944 else {
945 printf ("\n-------");
946 if (ofilen == 1)
947 printf (" Forwarded Message%s", ofilec > 1 ? "s" : "");
948 else
949 printf (" Message %d", ofilen);
950 printf ("\n\n");
951 }
952 } else {
953 switch (ontty) {
954 case PITTY:
955 if (ofilec > 1) {
956 if (ofilen > 1) {
957 if ((global.c_flags & CLEARSCR))
958 nmh_clear_screen ();
959 else
960 printf ("\n\n\n");
961 }
962 printf (">>> %s\n\n", mname);
963 }
964 break;
965
966 case ISTTY:
967 strncpy (buf, "\n", sizeof(buf));
968 if (ofilec > 1) {
969 if (SOprintf ("Press <return> to list \"%s\"...", mname)) {
970 if (ofilen > 1)
971 printf ("\n\n\n");
972 printf ("Press <return> to list \"%s\"...", mname);
973 }
974 fflush (stdout);
975 buf[0] = 0;
976 if (read (fileno (stdout), buf, sizeof(buf)) < 0) {
977 advise ("stdout", "read");
978 }
979 }
980 if (strchr(buf, '\n')) {
981 if ((global.c_flags & CLEARSCR))
982 nmh_clear_screen ();
983 }
984 else
985 printf ("\n");
986 break;
987
988 default:
989 if (ofilec > 1) {
990 if (ofilen > 1) {
991 printf ("\n\n\n");
992 if (clearflg > 0)
993 nmh_clear_screen ();
994 }
995 printf (">>> %s\n\n", mname);
996 }
997 break;
998 }
999 }
1000
1001 for (;;) {
1002 int bufsz = sizeof buf;
1003 switch (state = m_getfld (&gstate, name, buf, &bufsz, fp)) {
1004 case FLD:
1005 case FLDPLUS:
1006 bucket = fmt_addcomptext(name, buf);
1007 for (ip = ignores; *ip; ip++)
1008 if (!strcasecmp (name, *ip)) {
1009 while (state == FLDPLUS) {
1010 bufsz = sizeof buf;
1011 state = m_getfld (&gstate, name, buf, &bufsz, fp);
1012 fmt_appendcomp(bucket, name, buf);
1013 }
1014 break;
1015 }
1016 if (*ip)
1017 continue;
1018
1019 for (c2 = fmthd; c2; c2 = c2->c_next)
1020 if (!strcasecmp (c2->c_name ? c2->c_name : "", name))
1021 break;
1022 c1 = NULL;
1023 if (!((c3 = c2 ? c2 : &global)->c_flags & SPLIT))
1024 for (c1 = msghd; c1; c1 = c1->c_next)
1025 if (!strcasecmp (c1->c_name ? c1->c_name : "",
1026 c3->c_name ? c3->c_name : "")) {
1027 c1->c_text =
1028 mcomp_add (c1->c_flags, buf, c1->c_text);
1029 break;
1030 }
1031 if (c1 == NULL)
1032 c1 = add_queue (&msghd, &msgtl, name, buf, 0);
1033 while (state == FLDPLUS) {
1034 bufsz = sizeof buf;
1035 state = m_getfld (&gstate, name, buf, &bufsz, fp);
1036 c1->c_text = add (buf, c1->c_text);
1037 fmt_appendcomp(bucket, name, buf);
1038 }
1039 if (c2 == NULL)
1040 c1->c_flags |= EXTRA;
1041 continue;
1042
1043 case BODY:
1044 case FILEEOF:
1045 row = column = 0;
1046 for (c1 = fmthd; c1; c1 = c1->c_next) {
1047 if (c1->c_flags & CLEARTEXT) {
1048 putcomp (c1, c1, ONECOMP);
1049 continue;
1050 }
1051 if (!c1->c_name ||
1052 !strcasecmp (c1->c_name, "messagename")) {
1053 holder.c_text = concat ("(Message ", mname, ")\n",
1054 NULL);
1055 putcomp (c1, &holder, ONECOMP);
1056 free (holder.c_text);
1057 holder.c_text = NULL;
1058 continue;
1059 }
1060 if (!c1->c_name || !strcasecmp (c1->c_name, "extras")) {
1061 for (c2 = msghd; c2; c2 = c2->c_next)
1062 if (c2->c_flags & EXTRA)
1063 putcomp (c1, c2, TWOCOMP);
1064 continue;
1065 }
1066 if (dobody && (!c1->c_name ||
1067 !strcasecmp (c1->c_name, "body"))) {
1068 if (c1->c_flags & FMTFILTER && state == BODY &&
1069 formatproc != NULL) {
1070 filterbody(c1, buf, sizeof(buf), state, fp, gstate);
1071 } else {
1072 holder.c_text = mh_xmalloc (sizeof(buf));
1073 strncpy (holder.c_text, buf, sizeof(buf));
1074 while (state == BODY) {
1075 putcomp (c1, &holder, BODYCOMP);
1076 bufsz = sizeof buf;
1077 state = m_getfld (&gstate, name, holder.c_text,
1078 &bufsz, fp);
1079 }
1080 free (holder.c_text);
1081 holder.c_text = NULL;
1082 }
1083 continue;
1084 }
1085 for (c2 = msghd; c2; c2 = c2->c_next)
1086 if (!strcasecmp (c2->c_name ? c2->c_name : "",
1087 c1->c_name ? c1->c_name : "")) {
1088 putcomp (c1, c2, ONECOMP);
1089 if (!(c1->c_flags & SPLIT))
1090 break;
1091 }
1092 }
1093 m_getfld_state_destroy (&gstate);
1094 return;
1095
1096 case LENERR:
1097 case FMTERR:
1098 advise (NULL, "format error in message %s", mname);
1099 exitstat++;
1100 m_getfld_state_destroy (&gstate);
1101 return;
1102
1103 default:
1104 adios (NULL, "getfld() returned %d", state);
1105 }
1106 }
1107 }
1108
1109
1110 static int
1111 mcomp_flags (char *name)
1112 {
1113 struct pair *ap;
1114
1115 for (ap = pairs; ap->p_name; ap++)
1116 if (!strcasecmp (ap->p_name, name))
1117 return (ap->p_flags);
1118
1119 return 0;
1120 }
1121
1122
1123 static char *
1124 mcomp_add (long flags, char *s1, char *s2)
1125 {
1126 char *dp;
1127
1128 if (!(flags & ADDRFMT))
1129 return add (s1, s2);
1130
1131 if (s2 && *(dp = s2 + strlen (s2) - 1) == '\n')
1132 *dp = 0;
1133
1134 return add (s1, add (",\n", s2));
1135 }
1136
1137
1138 struct pqpair {
1139 char *pq_text;
1140 char *pq_error;
1141 struct pqpair *pq_next;
1142 };
1143
1144
1145 static void
1146 mcomp_format (struct mcomp *c1, struct mcomp *c2)
1147 {
1148 int dat[5];
1149 char *ap, *cp;
1150 char error[BUFSIZ];
1151 struct pqpair *p, *q;
1152 struct pqpair pq;
1153 struct mailname *mp;
1154
1155 ap = c2->c_text;
1156 c2->c_text = NULL;
1157 dat[0] = 0;
1158 dat[1] = 0;
1159 dat[2] = filesize;
1160 dat[3] = BUFSIZ - 1;
1161 dat[4] = 0;
1162
1163 if (!(c1->c_flags & ADDRFMT)) {
1164 charstring_t scanl = charstring_create (BUFSIZ);
1165
1166 if (c1->c_c_text)
1167 c1->c_c_text->c_text = ap;
1168 if ((cp = strrchr(ap, '\n'))) /* drop ending newline */
1169 if (!cp[1])
1170 *cp = 0;
1171
1172 fmt_scan (c1->c_fmt, scanl, BUFSIZ - 1, dat, NULL);
1173 /* Don't need to append a newline, dctime() already did */
1174 c2->c_text = charstring_buffer_copy (scanl);
1175 charstring_free (scanl);
1176
1177 /* ap is now owned by the component struct, so do NOT free it here */
1178 return;
1179 }
1180
1181 (q = &pq)->pq_next = NULL;
1182 while ((cp = getname (ap))) {
1183 if ((p = (struct pqpair *) calloc ((size_t) 1, sizeof(*p))) == NULL)
1184 adios (NULL, "unable to allocate pqpair memory");
1185
1186 if ((mp = getm (cp, NULL, 0, error, sizeof(error))) == NULL) {
1187 p->pq_text = getcpy (cp);
1188 p->pq_error = getcpy (error);
1189 } else {
1190 p->pq_text = getcpy (mp->m_text);
1191 mnfree (mp);
1192 }
1193 q = (q->pq_next = p);
1194 }
1195
1196 for (p = pq.pq_next; p; p = q) {
1197 charstring_t scanl = charstring_create (BUFSIZ);
1198 char *buffer;
1199
1200 if (c1->c_c_text) {
1201 c1->c_c_text->c_text = p->pq_text;
1202 p->pq_text = NULL;
1203 }
1204 if (c1->c_c_error) {
1205 c1->c_c_error->c_text = p->pq_error;
1206 p->pq_error = NULL;
1207 }
1208
1209 fmt_scan (c1->c_fmt, scanl, BUFSIZ - 1, dat, NULL);
1210 buffer = charstring_buffer_copy (scanl);
1211 if (strlen (buffer) > 0) {
1212 if (c2->c_text)
1213 c2->c_text = add (",\n", c2->c_text);
1214 if (*(cp = buffer + strlen (buffer) - 1) == '\n')
1215 *cp = 0;
1216 c2->c_text = add (buffer, c2->c_text);
1217 }
1218 charstring_free (scanl);
1219
1220 if (p->pq_text)
1221 free (p->pq_text);
1222 if (p->pq_error)
1223 free (p->pq_error);
1224 q = p->pq_next;
1225 free ((char *) p);
1226 }
1227
1228 c2->c_text = add ("\n", c2->c_text);
1229 free (ap);
1230 }
1231
1232
1233 static struct mcomp *
1234 add_queue (struct mcomp **head, struct mcomp **tail, char *name, char *text, int flags)
1235 {
1236 struct mcomp *c1;
1237
1238 if ((c1 = (struct mcomp *) calloc ((size_t) 1, sizeof(*c1))) == NULL)
1239 adios (NULL, "unable to allocate comp memory");
1240
1241 c1->c_flags = flags & ~INIT;
1242 if ((c1->c_name = name ? getcpy (name) : NULL))
1243 c1->c_flags |= mcomp_flags (c1->c_name);
1244 c1->c_text = text ? getcpy (text) : NULL;
1245 if (flags & INIT) {
1246 if (global.c_ovtxt)
1247 c1->c_ovtxt = getcpy (global.c_ovtxt);
1248 c1->c_offset = global.c_offset;
1249 c1->c_ovoff = global. c_ovoff;
1250 c1->c_width = c1->c_length = 0;
1251 c1->c_cwidth = global.c_cwidth;
1252 c1->c_flags |= global.c_flags & GFLAGS;
1253 }
1254 if (*head == NULL)
1255 *head = c1;
1256 if (*tail != NULL)
1257 (*tail)->c_next = c1;
1258 *tail = c1;
1259
1260 return c1;
1261 }
1262
1263
1264 static void
1265 free_queue (struct mcomp **head, struct mcomp **tail)
1266 {
1267 struct mcomp *c1, *c2;
1268
1269 for (c1 = *head; c1; c1 = c2) {
1270 c2 = c1->c_next;
1271 if (c1->c_name)
1272 free (c1->c_name);
1273 if (c1->c_text)
1274 free (c1->c_text);
1275 if (c1->c_ovtxt)
1276 free (c1->c_ovtxt);
1277 if (c1->c_nfs)
1278 free (c1->c_nfs);
1279 if (c1->c_fmt)
1280 fmt_free (c1->c_fmt, 0);
1281 free ((char *) c1);
1282 }
1283
1284 *head = *tail = NULL;
1285 }
1286
1287
1288 static void
1289 putcomp (struct mcomp *c1, struct mcomp *c2, int flag)
1290 {
1291 int count, cchdr;
1292 char *cp;
1293
1294 cchdr = 0;
1295 lm = 0;
1296 llim = c1->c_length ? c1->c_length : -1;
1297 wid = c1->c_width ? c1->c_width : global.c_width;
1298 ovoff = (c1->c_ovoff >= 0 ? c1->c_ovoff : global.c_ovoff)
1299 + c1->c_offset;
1300 if ((ovtxt = c1->c_ovtxt ? c1->c_ovtxt : global.c_ovtxt) == NULL)
1301 ovtxt = "";
1302 if (wid < ovoff + strlen (ovtxt) + 5)
1303 adios (NULL, "component: %s width(%d) too small for overflow(%d)",
1304 c1->c_name, wid, ovoff + strlen (ovtxt) + 5);
1305 onelp = NULL;
1306
1307 if (c1->c_flags & CLEARTEXT) {
1308 putstr (c1->c_text, c1->c_flags);
1309 putstr ("\n", c1->c_flags);
1310 return;
1311 }
1312
1313 if (c1->c_nfs && (c1->c_flags & (ADDRFMT | DATEFMT | FORMAT)))
1314 mcomp_format (c1, c2);
1315
1316 if (c1->c_flags & CENTER) {
1317 count = (c1->c_width ? c1->c_width : global.c_width)
1318 - c1->c_offset - strlen (c2->c_text);
1319 if (!(c1->c_flags & HDROUTPUT) && !(c1->c_flags & NOCOMPONENT))
1320 count -= strlen (c1->c_text ? c1->c_text : c1->c_name) + 2;
1321 lm = c1->c_offset + (count / 2);
1322 } else {
1323 if (c1->c_offset)
1324 lm = c1->c_offset;
1325 }
1326
1327 if (!(c1->c_flags & HDROUTPUT) && !(c1->c_flags & NOCOMPONENT)) {
1328 if (c1->c_flags & UPPERCASE) /* uppercase component also */
1329 for (cp = (c1->c_text ? c1->c_text : c1->c_name); *cp; cp++)
1330 if (islower ((unsigned char) *cp))
1331 *cp = toupper ((unsigned char) *cp);
1332 putstr (c1->c_text ? c1->c_text : c1->c_name, c1->c_flags);
1333 if (flag != BODYCOMP) {
1334 putstr (": ", c1->c_flags);
1335 if (!(c1->c_flags & SPLIT))
1336 c1->c_flags |= HDROUTPUT;
1337
1338 cchdr++;
1339 if ((count = c1->c_cwidth -
1340 strlen (c1->c_text ? c1->c_text : c1->c_name) - 2) > 0)
1341 while (count--)
1342 putstr (" ", c1->c_flags);
1343 }
1344 else
1345 c1->c_flags |= HDROUTPUT; /* for BODYCOMP */
1346 }
1347
1348 if (flag == TWOCOMP
1349 && !(c2->c_flags & HDROUTPUT)
1350 && !(c2->c_flags & NOCOMPONENT)) {
1351 if (c1->c_flags & UPPERCASE)
1352 for (cp = c2->c_name; *cp; cp++)
1353 if (islower ((unsigned char) *cp))
1354 *cp = toupper ((unsigned char) *cp);
1355 putstr (c2->c_name, c1->c_flags);
1356 putstr (": ", c1->c_flags);
1357 if (!(c1->c_flags & SPLIT))
1358 c2->c_flags |= HDROUTPUT;
1359
1360 cchdr++;
1361 if ((count = c1->c_cwidth - strlen (c2->c_name) - 2) > 0)
1362 while (count--)
1363 putstr (" ", c1->c_flags);
1364 }
1365 if (c1->c_flags & UPPERCASE)
1366 for (cp = c2->c_text; *cp; cp++)
1367 if (islower ((unsigned char) *cp))
1368 *cp = toupper ((unsigned char) *cp);
1369
1370 count = 0;
1371 if (cchdr) {
1372 if (flag == TWOCOMP)
1373 count = (c1->c_cwidth >= 0) ? c1->c_cwidth
1374 : (int) strlen (c2->c_name) + 2;
1375 else
1376 count = (c1->c_cwidth >= 0) ? (size_t) c1->c_cwidth
1377 : strlen (c1->c_text ? c1->c_text : c1->c_name) + 2;
1378 }
1379 count += c1->c_offset;
1380
1381 if ((cp = oneline (c2->c_text, c1->c_flags)))
1382 putstr(cp, c1->c_flags);
1383 if (term == '\n')
1384 putstr ("\n", c1->c_flags);
1385 while ((cp = oneline (c2->c_text, c1->c_flags))) {
1386 lm = count;
1387 if (flag == BODYCOMP
1388 && !(c1->c_flags & NOCOMPONENT))
1389 putstr (c1->c_text ? c1->c_text : c1->c_name, c1->c_flags);
1390 if (*cp)
1391 putstr (cp, c1->c_flags);
1392 if (term == '\n')
1393 putstr ("\n", c1->c_flags);
1394 }
1395 if (flag == BODYCOMP && term == '\n')
1396 c1->c_flags &= ~HDROUTPUT; /* Buffer ended on a newline */
1397 }
1398
1399
1400 static char *
1401 oneline (char *stuff, long flags)
1402 {
1403 int spc;
1404 char *cp, *ret;
1405
1406 if (onelp == NULL)
1407 onelp = stuff;
1408 if (*onelp == 0)
1409 return (onelp = NULL);
1410
1411 ret = onelp;
1412 term = 0;
1413 if (flags & COMPRESS) {
1414 for (spc = 1, cp = ret; *onelp; onelp++)
1415 if (isspace ((unsigned char) *onelp)) {
1416 if (*onelp == '\n' && (!onelp[1] || (flags & ADDRFMT))) {
1417 term = '\n';
1418 *onelp++ = 0;
1419 break;
1420 }
1421 else
1422 if (!spc) {
1423 *cp++ = ' ';
1424 spc++;
1425 }
1426 }
1427 else {
1428 *cp++ = *onelp;
1429 spc = 0;
1430 }
1431
1432 *cp = 0;
1433 }
1434 else {
1435 while (*onelp && *onelp != '\n')
1436 onelp++;
1437 if (*onelp == '\n') {
1438 term = '\n';
1439 *onelp++ = 0;
1440 }
1441 if (flags & LEFTADJUST)
1442 while (*ret == ' ' || *ret == '\t')
1443 ret++;
1444 }
1445 if (*onelp == 0 && term == '\n' && (flags & NONEWLINE))
1446 term = 0;
1447
1448 return ret;
1449 }
1450
1451
1452 static void
1453 putstr (char *string, long flags)
1454 {
1455 if (!column && lm > 0) {
1456 while (lm > 0)
1457 if (lm >= 8) {
1458 putch ('\t', flags);
1459 lm -= 8;
1460 }
1461 else {
1462 putch (' ', flags);
1463 lm--;
1464 }
1465 }
1466 lm = 0;
1467 while (*string)
1468 putch (*string++, flags);
1469 }
1470
1471
1472 static void
1473 putch (char ch, long flags)
1474 {
1475 char buf[BUFSIZ];
1476
1477 if (llim == 0)
1478 return;
1479
1480 switch (ch) {
1481 case '\n':
1482 if (llim > 0)
1483 llim--;
1484 column = 0;
1485 row++;
1486 if (ontty != ISTTY || row != global.c_length)
1487 break;
1488 if (global.c_flags & BELL)
1489 putchar ('\007');
1490 fflush (stdout);
1491 buf[0] = 0;
1492 if (read (fileno (stdout), buf, sizeof(buf)) < 0) {
1493 advise ("stdout", "read");
1494 }
1495 if (strchr(buf, '\n')) {
1496 if (global.c_flags & CLEARSCR)
1497 nmh_clear_screen ();
1498 row = 0;
1499 } else {
1500 putchar ('\n');
1501 row = global.c_length / 3;
1502 }
1503 return;
1504
1505 case '\t':
1506 column |= 07;
1507 column++;
1508 break;
1509
1510 case '\b':
1511 column--;
1512 break;
1513
1514 case '\r':
1515 column = 0;
1516 break;
1517
1518 default:
1519 /*
1520 * If we are forwarding this message, and the first
1521 * column contains a dash, then add a dash and a space.
1522 */
1523 if (column == 0 && forwflg && (dashstuff >= 0) && ch == '-') {
1524 putchar ('-');
1525 putchar (' ');
1526 }
1527 if (ch >= ' ')
1528 column++;
1529 break;
1530 }
1531
1532 if (column >= wid && (flags & NOWRAP) == 0) {
1533 putch ('\n', flags);
1534 if (ovoff > 0)
1535 lm = ovoff;
1536 putstr (ovtxt ? ovtxt : "", flags);
1537 putch (ch, flags);
1538 return;
1539 }
1540
1541 putchar (ch);
1542 }
1543
1544
1545 static void
1546 intrser (int i)
1547 {
1548 NMH_UNUSED (i);
1549
1550 discard (stdout);
1551 putchar ('\n');
1552 longjmp (env, DONE);
1553 }
1554
1555
1556 static void
1557 pipeser (int i)
1558 {
1559 NMH_UNUSED (i);
1560
1561 done (NOTOK);
1562 }
1563
1564
1565 static void
1566 quitser (int i)
1567 {
1568 NMH_UNUSED (i);
1569
1570 putchar ('\n');
1571 fflush (stdout);
1572 done (NOTOK);
1573 }
1574
1575
1576 #undef adios
1577 #undef done
1578
1579 static void
1580 mhladios (char *what, char *fmt, ...)
1581 {
1582 va_list ap;
1583
1584 va_start(ap, fmt);
1585 advertise (what, NULL, fmt, ap);
1586 va_end(ap);
1587 mhldone (1);
1588 }
1589
1590
1591 static void
1592 mhldone (int status)
1593 {
1594 exitstat = status;
1595 if (mhl_action)
1596 longjmp (mhlenv, DONE);
1597 else
1598 done (exitstat);
1599 }
1600
1601
1602 /*
1603 * Compile a format string used by the formatfield option and save it
1604 * for later.
1605 *
1606 * We will want the {text} (and possibly {error}) components for later,
1607 * so look for them and save them if we find them.
1608 */
1609
1610 static void
1611 compile_formatfield(struct mcomp *c1)
1612 {
1613 fmt_compile(c1->c_nfs, &c1->c_fmt, 1);
1614
1615 /*
1616 * As a note to myself and any other poor bastard who is looking through
1617 * this code in the future ....
1618 *
1619 * When the format hash table is reset later on (as it almost certainly
1620 * will be), there will still be references to these components in the
1621 * compiled format instructions. Thus these component references will
1622 * be free'd when the format instructions are free'd (by fmt_free()).
1623 *
1624 * So, in other words ... don't go free'ing them yourself!
1625 */
1626
1627 c1->c_c_text = fmt_findcomp("text");
1628 c1->c_c_error = fmt_findcomp("error");
1629 }
1630
1631 /*
1632 * Compile all of the arguments for our format list.
1633 *
1634 * Iterate through the linked list of format strings and compile them.
1635 * Note that we reset the format hash table before we start, but we do NOT
1636 * reset it between calls to fmt_compile().
1637 *
1638 */
1639
1640 static void
1641 compile_filterargs (void)
1642 {
1643 struct arglist *arg = arglist_head;
1644 struct comp *cptr;
1645 char **ap;
1646
1647 fmt_free(NULL, 1);
1648
1649 while (arg) {
1650 fmt_compile(arg->a_nfs, &arg->a_fmt, 0);
1651 arg = arg->a_next;
1652 }
1653
1654 /*
1655 * Search through and mark any components that are address components
1656 */
1657
1658 for (ap = addrcomps; *ap; ap++) {
1659 cptr = fmt_findcomp (*ap);
1660 if (cptr)
1661 cptr->c_type |= CT_ADDR;
1662 }
1663 }
1664
1665 /*
1666 * Filter the body of a message through a specified format program
1667 */
1668
1669 static void
1670 filterbody (struct mcomp *c1, char *buf, int bufsz, int state, FILE *fp,
1671 m_getfld_state_t gstate)
1672 {
1673 struct mcomp holder;
1674 char name[NAMESZ];
1675 int fdinput[2], fdoutput[2], waitstat;
1676 ssize_t cc;
1677 pid_t writerpid, filterpid;
1678
1679 /*
1680 * Create pipes so we can communicate with our filter process.
1681 */
1682
1683 if (pipe(fdinput) < 0) {
1684 adios(NULL, "Unable to create input pipe");
1685 }
1686
1687 if (pipe(fdoutput) < 0) {
1688 adios(NULL, "Unable to create output pipe");
1689 }
1690
1691 /*
1692 * Here's what we're doing to do.
1693 *
1694 * - Fork ourselves and start writing data to the write side of the
1695 * input pipe (fdinput[1]).
1696 *
1697 * - Fork and exec our filter program. We set the standard input of
1698 * our filter program to be the read side of our input pipe (fdinput[0]).
1699 * Standard output is set to the write side of our output pipe
1700 * (fdoutput[1]).
1701 *
1702 * - We read from the read side of the output pipe (fdoutput[0]).
1703 *
1704 * We're forking because that's the simplest way to prevent any deadlocks.
1705 * (without doing something like switching to non-blocking I/O and using
1706 * select or poll, and I'm not interested in doing that).
1707 */
1708
1709 switch (writerpid = fork()) {
1710 case 0:
1711 /*
1712 * Our child process - just write to the filter input (fdinput[1]).
1713 * Close all other descriptors that we don't need.
1714 */
1715
1716 close(fdinput[0]);
1717 close(fdoutput[0]);
1718 close(fdoutput[1]);
1719
1720 /*
1721 * Call m_getfld() until we're no longer in the BODY state
1722 */
1723
1724 while (state == BODY) {
1725 int bufsz2 = bufsz;
1726 if (write(fdinput[1], buf, strlen(buf)) < 0) {
1727 advise ("pipe output", "write");
1728 }
1729 state = m_getfld (&gstate, name, buf, &bufsz2, fp);
1730 }
1731
1732 /*
1733 * We should be done; time to exit.
1734 */
1735
1736 close(fdinput[1]);
1737 /*
1738 * Make sure we call _exit(), otherwise we may flush out the stdio
1739 * buffers that we have duplicated from the parent.
1740 */
1741 _exit(0);
1742 case -1:
1743 adios(NULL, "Unable to fork for filter writer process");
1744 break;
1745 }
1746
1747 /*
1748 * Fork and exec() our filter program, after redirecting standard in
1749 * and standard out appropriately.
1750 */
1751
1752 switch (filterpid = fork()) {
1753 char **args, *program;
1754 struct arglist *a;
1755 int i, dat[5], s, argp;
1756
1757 case 0:
1758 /*
1759 * Configure an argument array for us
1760 */
1761
1762 args = argsplit(formatproc, &program, &argp);
1763 args[argp + filter_nargs] = NULL;
1764 dat[0] = 0;
1765 dat[1] = 0;
1766 dat[2] = 0;
1767 dat[3] = BUFSIZ;
1768 dat[4] = 0;
1769
1770 /*
1771 * Pull out each argument and scan them.
1772 */
1773
1774 for (a = arglist_head, i = argp; a != NULL; a = a->a_next, i++) {
1775 charstring_t scanl = charstring_create (BUFSIZ);
1776
1777 fmt_scan(a->a_fmt, scanl, BUFSIZ, dat, NULL);
1778 args[i] = charstring_buffer_copy (scanl);
1779 charstring_free (scanl);
1780 /*
1781 * fmt_scan likes to put a trailing newline at the end of the
1782 * format string. If we have one, get rid of it.
1783 */
1784 s = strlen(args[i]);
1785 if (args[i][s - 1] == '\n')
1786 args[i][s - 1] = '\0';
1787
1788 if (mhldebug)
1789 fprintf(stderr, "filterarg: fmt=\"%s\", output=\"%s\"\n",
1790 a->a_nfs, args[i]);
1791 }
1792
1793 if (dup2(fdinput[0], STDIN_FILENO) < 0) {
1794 adios("formatproc", "Unable to dup2() standard input");
1795 }
1796 if (dup2(fdoutput[1], STDOUT_FILENO) < 0) {
1797 adios("formatproc", "Unable to dup2() standard output");
1798 }
1799
1800 /*
1801 * Close everything (especially the old input and output
1802 * descriptors, since they've been dup'd to stdin and stdout),
1803 * and exec the formatproc.
1804 */
1805
1806 close(fdinput[0]);
1807 close(fdinput[1]);
1808 close(fdoutput[0]);
1809 close(fdoutput[1]);
1810
1811 execvp(formatproc, args);
1812
1813 adios(formatproc, "Unable to execute filter");
1814
1815 break;
1816
1817 case -1:
1818 adios(NULL, "Unable to fork format program");
1819 }
1820
1821 /*
1822 * Close everything except our reader (fdoutput[0]);
1823 */
1824
1825 close(fdinput[0]);
1826 close(fdinput[1]);
1827 close(fdoutput[1]);
1828
1829 /*
1830 * As we read in this data, send it to putcomp
1831 */
1832
1833 holder.c_text = buf;
1834
1835 while ((cc = read(fdoutput[0], buf, bufsz - 1)) > 0) {
1836 buf[cc] = '\0';
1837 putcomp(c1, &holder, BODYCOMP);
1838 }
1839
1840 if (cc < 0) {
1841 adios(NULL, "reading from formatproc");
1842 }
1843
1844 /*
1845 * See if we got any errors along the way. I'm a little leery of calling
1846 * waitpid() without WNOHANG, but it seems to be the most correct solution.
1847 */
1848
1849 if (waitpid(filterpid, &waitstat, 0) < 0) {
1850 if (errno != ECHILD) {
1851 adios("filterproc", "Unable to determine status");
1852 }
1853 } else {
1854 if (! (WIFEXITED(waitstat) && WEXITSTATUS(waitstat) == 0)) {
1855 pidstatus(waitstat, stderr, "filterproc");
1856 }
1857 }
1858
1859 if (waitpid(writerpid, &waitstat, 0) < 0) {
1860 if (errno != ECHILD) {
1861 adios("writer process", "Unable to determine status");
1862 done(1);
1863 }
1864 } else {
1865 if (! (WIFEXITED(waitstat) && WEXITSTATUS(waitstat) == 0)) {
1866 pidstatus(waitstat, stderr, "writer process");
1867 done(1);
1868 }
1869 }
1870
1871 close(fdoutput[0]);
1872 }
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