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cppflags.m4: Don't trample CFLAGS and CPPFLAGS.
[nmh] / uip / mhlsbr.c
1 /* mhlsbr.c -- main routines for nmh message lister
2 *
3 * This code is Copyright (c) 2002, by the authors of nmh. See the
4 * COPYRIGHT file in the root directory of the nmh distribution for
5 * complete copyright information.
6 */
7
8 #include <h/mh.h>
9 #include <h/signals.h>
10 #include <h/addrsbr.h>
11 #include <h/fmt_scan.h>
12 #include <h/tws.h>
13 #include <h/utils.h>
14 #include "../sbr/m_popen.h"
15 #include <setjmp.h>
16 #include <sys/types.h>
17
18 /*
19 * MAJOR BUG:
20 * for a component containing addresses, ADDRFMT, if COMPRESS is also
21 * set, then addresses get split wrong (not at the spaces between commas).
22 * To fix this correctly, putstr() should know about "atomic" strings that
23 * must NOT be broken across lines. That's too difficult for right now
24 * (it turns out that there are a number of degenerate cases), so in
25 * oneline(), instead of
26 *
27 * (*onelp == '\n' && !onelp[1])
28 *
29 * being a terminating condition,
30 *
31 * (*onelp == '\n' && (!onelp[1] || (flags & ADDRFMT)))
32 *
33 * is used instead. This cuts the line prematurely, and gives us a much
34 * better chance of getting things right.
35 */
36
37 #define ONECOMP 0
38 #define TWOCOMP 1
39 #define BODYCOMP 2
40
41 #define QUOTE '\\'
42
43 #define MHL_SWITCHES \
44 X("bell", 0, BELLSW) \
45 X("nobell", 0, NBELLSW) \
46 X("clear", 0, CLRSW) \
47 X("noclear", 0, NCLRSW) \
48 X("folder +folder", 0, FOLDSW) \
49 X("form formfile", 0, FORMSW) \
50 X("moreproc program", 0, PROGSW) \
51 X("nomoreproc", 0, NPROGSW) \
52 X("length lines", 0, LENSW) \
53 X("width columns", 0, WIDTHSW) \
54 X("sleep seconds", 0, SLEEPSW) \
55 X("dashstuffing", -12, BITSTUFFSW) /* interface from forw */ \
56 X("nodashstuffing", -14, NBITSTUFFSW) /* interface from forw */ \
57 X("version", 0, VERSIONSW) \
58 X("help", 0, HELPSW) \
59 X("forward", -7, FORW1SW) /* interface from forw */ \
60 X("forwall", -7, FORW2SW) /* interface from forw */ \
61 X("digest list", -6, DGSTSW) \
62 X("volume number", -6, VOLUMSW) \
63 X("issue number", -5, ISSUESW) \
64 X("nobody", -6, NBODYSW) \
65 X("fmtproc program", 0, FMTPROCSW) \
66 X("nofmtproc", 0, NFMTPROCSW) \
67
68 #define X(sw, minchars, id) id,
69 DEFINE_SWITCH_ENUM(MHL);
70 #undef X
71
72 #define X(sw, minchars, id) { sw, minchars, id },
73 DEFINE_SWITCH_ARRAY(MHL, mhlswitches);
74 #undef X
75
76 #define NOCOMPONENT 0x000001 /* don't show component name */
77 #define UPPERCASE 0x000002 /* display in all upper case */
78 #define CENTER 0x000004 /* center line */
79 #define CLEARTEXT 0x000008 /* cleartext */
80 #define EXTRA 0x000010 /* an "extra" component */
81 #define HDROUTPUT 0x000020 /* already output */
82 #define CLEARSCR 0x000040 /* clear screen */
83 #define LEFTADJUST 0x000080 /* left justify multiple lines */
84 #define COMPRESS 0x000100 /* compress text */
85 #define ADDRFMT 0x000200 /* contains addresses */
86 #define BELL 0x000400 /* sound bell at EOP */
87 #define DATEFMT 0x000800 /* contains dates */
88 #define FORMAT 0x001000 /* parse address/date/RFC-2047 field */
89 #define INIT 0x002000 /* initialize component */
90 #define RTRIM 0x004000 /* trim trailing whitespace */
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 INVISIBLE 0x100000 /* count byte in display columns? */
96 #define FORCE7BIT 0x200000 /* don't display 8-bit bytes */
97 #define LBITS "\020\01NOCOMPONENT\02UPPERCASE\03CENTER\04CLEARTEXT\05EXTRA\06HDROUTPUT\07CLEARSCR\010LEFTADJUST\011COMPRESS\012ADDRFMT\013BELL\014DATEFMT\015FORMAT\016INIT\017RTRIM\021SPLIT\022NONEWLINE\023NOWRAP\024FMTFILTER\025INVISIBLE\026FORCE7BIT"
98 #define GFLAGS (NOCOMPONENT | UPPERCASE | CENTER | LEFTADJUST | COMPRESS | SPLIT | NOWRAP)
99
100 /*
101 * A format string to be used as a command-line argument to the body
102 * format filter.
103 */
104
105 struct arglist {
106 struct format *a_fmt;
107 char *a_nfs;
108 struct arglist *a_next;
109 };
110
111 /*
112 * Linked list of command line arguments for the body format filter. This
113 * USED to be in "struct mcomp", but the format API got cleaned up and even
114 * though it reduced the code we had to do, it make things more complicated
115 * for us. Specifically:
116 *
117 * - The interface to the hash table has been cleaned up, which means the
118 * rooting around in the hash table is no longer necessary (yay!). But
119 * this ALSO means that we have to make sure that we call our format
120 * compilation routines before we process the message, because the
121 * components need to be visible in the hash table so we can save them for
122 * later. So we moved them out of "mcomp" and now compile them right before
123 * header processing starts.
124 * - We also use format strings to handle other components in the mhl
125 * configuration (using "formatfield" and "decode"), but here life
126 * gets complicated: they aren't dealt with in the normal way. Instead
127 * of referring to a component like {from}, each component is processed
128 * using the special {text} component. But these format strings need to be
129 * compiled BEFORE we compile the format arguments; in the previous
130 * implementation they were compiled and scanned as the headers were
131 * read, and that would reset the hash table that we need to populate
132 * the components used by the body format filter. So we are compiling
133 * the formatfield component strings ahead of time and then scanning them
134 * later.
135 *
136 * Okay, fine ... this was broken before. But you know what? Fixing this
137 * the right way will make things easier down the road.
138 *
139 * One side-effect to this change: format strings are now compiled only once
140 * for components specified with "formatfield", but they are compiled for
141 * every message for format arguments.
142 */
143
144 static struct arglist *arglist_head;
145 static struct arglist *arglist_tail;
146 static int filter_nargs = 0;
147
148 /*
149 * Flags/options for each component
150 */
151
152 struct mcomp {
153 char *c_name; /* component name */
154 char *c_text; /* component text */
155 char *c_ovtxt; /* text overflow indicator */
156 char *c_nfs; /* iff FORMAT */
157 struct format *c_fmt; /* .. */
158 struct comp *c_c_text; /* Ref to {text} in FORMAT */
159 struct comp *c_c_error; /* Ref to {error} */
160 int c_offset; /* left margin indentation */
161 int c_ovoff; /* overflow indentation */
162 int c_width; /* width of field */
163 int c_cwidth; /* width of component */
164 int c_length; /* length in lines */
165 unsigned long c_flags;
166 struct mcomp *c_next;
167 };
168
169 static struct mcomp *msghd = NULL;
170 static struct mcomp *msgtl = NULL;
171 static struct mcomp *fmthd = NULL;
172 static struct mcomp *fmttl = NULL;
173
174 static struct mcomp global = {
175 NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0, -1, 80, -1, 40, BELL, NULL
176 };
177
178 static struct mcomp holder = {
179 NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0, 0, 0, 0, 0, NOCOMPONENT, NULL
180 };
181
182 struct pair {
183 char *p_name;
184 unsigned long p_flags;
185 };
186
187 static struct pair pairs[] = {
188 { "Date", DATEFMT },
189 { "From", ADDRFMT },
190 { "Sender", ADDRFMT },
191 { "Reply-To", ADDRFMT },
192 { "To", ADDRFMT },
193 { "cc", ADDRFMT },
194 { "Bcc", ADDRFMT },
195 { "Resent-Date", DATEFMT },
196 { "Resent-From", ADDRFMT },
197 { "Resent-Sender", ADDRFMT },
198 { "Resent-Reply-To", ADDRFMT },
199 { "Resent-To", ADDRFMT },
200 { "Resent-cc", ADDRFMT },
201 { "Resent-Bcc", ADDRFMT },
202 { NULL, 0 }
203 };
204
205 struct triple {
206 char *t_name;
207 unsigned long t_on;
208 unsigned long t_off;
209 };
210
211 static struct triple triples[] = {
212 { "nocomponent", NOCOMPONENT, 0 },
213 { "uppercase", UPPERCASE, 0 },
214 { "nouppercase", 0, UPPERCASE },
215 { "center", CENTER, 0 },
216 { "nocenter", 0, CENTER },
217 { "clearscreen", CLEARSCR, 0 },
218 { "noclearscreen", 0, CLEARSCR },
219 { "noclear", 0, CLEARSCR },
220 { "leftadjust", LEFTADJUST, 0 },
221 { "noleftadjust", 0, LEFTADJUST },
222 { "compress", COMPRESS, 0 },
223 { "nocompress", 0, COMPRESS },
224 { "split", SPLIT, 0 },
225 { "nosplit", 0, SPLIT },
226 { "rtrim", RTRIM, 0 },
227 { "nortrim", 0, RTRIM },
228 { "addrfield", ADDRFMT, DATEFMT },
229 { "bell", BELL, 0 },
230 { "nobell", 0, BELL },
231 { "datefield", DATEFMT, ADDRFMT },
232 { "newline", 0, NONEWLINE },
233 { "nonewline", NONEWLINE, 0 },
234 { "wrap", 0, NOWRAP },
235 { "nowrap", NOWRAP, 0 },
236 { "format", FMTFILTER, 0 },
237 { "noformat", 0, FMTFILTER },
238 { NULL, 0, 0 }
239 };
240
241 static char *addrcomps[] = {
242 "from",
243 "sender",
244 "reply-to",
245 "to",
246 "cc",
247 "bcc",
248 "resent-from",
249 "resent-sender",
250 "resent-reply-to",
251 "resent-to",
252 "resent-cc",
253 "resent-bcc",
254 NULL
255 };
256
257
258 static int bellflg = 0;
259 static int clearflg = 0;
260 static int dashstuff = 0;
261 static int dobody = 1;
262 static int forwflg = 0;
263 static int forwall = 0;
264
265 static int sleepsw = NOTOK;
266
267 static char *digest = NULL;
268 static int volume = 0;
269 static int issue = 0;
270
271 static int exitstat = 0;
272 static int mhldebug = 0;
273
274 static int filesize = 0;
275
276 #define PITTY (-1)
277 #define NOTTY 0
278 #define ISTTY 1
279 static int ontty = NOTTY;
280
281 static int row;
282 static unsigned int column;
283
284 static int lm;
285 static int llim;
286 static int ovoff;
287 static int term;
288 static unsigned int wid;
289
290 static char *ovtxt;
291
292 static char *onelp;
293
294 static char *parptr;
295
296 static int num_ignores = 0;
297 static char *ignores[MAXARGS];
298
299 static jmp_buf env;
300 static jmp_buf mhlenv;
301
302 static char delim3[] = /* from forw.c */
303 "\n----------------------------------------------------------------------\n\n";
304 static char delim4[] = "\n------------------------------\n\n";
305
306 static FILE *(*mhl_action)(char *);
307
308 /*
309 * prototypes
310 */
311 static void mhl_format (char *, int, int);
312 static int evalvar (struct mcomp *);
313 static int ptoi (char *, int *);
314 static int ptos (char *, char **);
315 static char *parse (void);
316 static void process (char *, char *, int, int);
317 static void mhlfile (FILE *, char *, int, int);
318 static int mcomp_flags (char *);
319 static char *mcomp_add (unsigned long, char *, char *);
320 static void mcomp_format (struct mcomp *, struct mcomp *);
321 static struct mcomp *add_queue (struct mcomp **, struct mcomp **, char *, char *, int);
322 static void free_queue (struct mcomp **, struct mcomp **);
323 static void putcomp (struct mcomp *, struct mcomp *, int);
324 static char *oneline (char *, unsigned long);
325 static void putstr (char *, unsigned long);
326 static void putch (char, unsigned long);
327 static void intrser (int);
328 static void pipeser (int);
329 static void quitser (int);
330 static void mhladios (char *, char *, ...);
331 static void mhldone (int);
332 static void filterbody (struct mcomp *, char *, int, int,
333 m_getfld_state_t);
334 static void compile_formatfield(struct mcomp *);
335 static void compile_filterargs (void);
336
337
338 int
339 mhl (int argc, char **argv)
340 {
341 int length = 0, nomore = 0;
342 unsigned int i, vecp = 0;
343 int width = 0;
344 char *cp, *folder = NULL, *form = NULL;
345 char buf[BUFSIZ], *files[MAXARGS];
346 char **argp, **arguments;
347
348 /* Need this if called from main() of show(1). */
349 invo_name = r1bindex (argv[0], '/');
350
351 arguments = getarguments (invo_name, argc, argv, 1);
352 argp = arguments;
353
354 if ((cp = getenv ("MHLDEBUG")) && *cp)
355 mhldebug++;
356
357 while ((cp = *argp++)) {
358 if (*cp == '-') {
359 switch (smatch (++cp, mhlswitches)) {
360 case AMBIGSW:
361 ambigsw (cp, mhlswitches);
362 mhldone (1);
363 /* FALLTHRU */
364 case UNKWNSW:
365 mhladios (NULL, "-%s unknown\n", cp);
366 /* FALLTHRU */
367
368 case HELPSW:
369 snprintf (buf, sizeof(buf), "%s [switches] [files ...]", invo_name);
370 print_help (buf, mhlswitches, 1);
371 mhldone (0);
372 /* FALLTHRU */
373 case VERSIONSW:
374 print_version(invo_name);
375 mhldone (0);
376 /* FALLTHRU */
377
378 case BELLSW:
379 bellflg = 1;
380 continue;
381 case NBELLSW:
382 bellflg = -1;
383 continue;
384
385 case CLRSW:
386 clearflg = 1;
387 continue;
388 case NCLRSW:
389 clearflg = -1;
390 continue;
391
392 case FOLDSW:
393 if (!(folder = *argp++) || *folder == '-')
394 mhladios (NULL, "missing argument to %s", argp[-2]);
395 continue;
396 case FORMSW:
397 if (!(form = *argp++) || *form == '-')
398 mhladios (NULL, "missing argument to %s", argp[-2]);
399 continue;
400
401 case SLEEPSW:
402 if (!(cp = *argp++) || *cp == '-')
403 mhladios (NULL, "missing argument to %s", argp[-2]);
404 else
405 sleepsw = atoi (cp);/* ZERO ok! */
406 continue;
407
408 case PROGSW:
409 if (!(moreproc = *argp++) || *moreproc == '-')
410 mhladios (NULL, "missing argument to %s", argp[-2]);
411 continue;
412 case NPROGSW:
413 nomore++;
414 continue;
415
416 case FMTPROCSW:
417 if (!(formatproc = *argp++) || *formatproc == '-')
418 mhladios (NULL, "missing argument to %s", argp[-2]);
419 continue;
420 case NFMTPROCSW:
421 formatproc = NULL;
422 continue;
423
424 case LENSW:
425 if (!(cp = *argp++) || *cp == '-')
426 mhladios (NULL, "missing argument to %s", argp[-2]);
427 else if ((length = atoi (cp)) < 1)
428 mhladios (NULL, "bad argument %s %s", argp[-2], cp);
429 continue;
430 case WIDTHSW:
431 if (!(cp = *argp++) || *cp == '-')
432 mhladios (NULL, "missing argument to %s", argp[-2]);
433 else if ((width = atoi (cp)) < 1)
434 mhladios (NULL, "bad argument %s %s", argp[-2], cp);
435 continue;
436
437 case DGSTSW:
438 if (!(digest = *argp++) || *digest == '-')
439 mhladios (NULL, "missing argument to %s", argp[-2]);
440 continue;
441 case ISSUESW:
442 if (!(cp = *argp++) || *cp == '-')
443 mhladios (NULL, "missing argument to %s", argp[-2]);
444 else if ((issue = atoi (cp)) < 1)
445 mhladios (NULL, "bad argument %s %s", argp[-2], cp);
446 continue;
447 case VOLUMSW:
448 if (!(cp = *argp++) || *cp == '-')
449 mhladios (NULL, "missing argument to %s", argp[-2]);
450 else if ((volume = atoi (cp)) < 1)
451 mhladios (NULL, "bad argument %s %s", argp[-2], cp);
452 continue;
453
454 case FORW2SW:
455 forwall++;
456 /* FALLTHRU */
457 case FORW1SW:
458 forwflg++;
459 clearflg = -1;/* XXX */
460 continue;
461
462 case BITSTUFFSW:
463 dashstuff = 1; /* ternary logic */
464 continue;
465 case NBITSTUFFSW:
466 dashstuff = -1; /* ternary logic */
467 continue;
468
469 case NBODYSW:
470 dobody = 0;
471 continue;
472 }
473 }
474 files[vecp++] = cp;
475 }
476
477 if (!folder)
478 folder = getenv ("mhfolder");
479
480 if (isatty (fileno (stdout))) {
481 if (!nomore && moreproc && *moreproc != '\0') {
482 if (mhl_action) {
483 SIGNAL (SIGINT, SIG_IGN);
484 SIGNAL2 (SIGQUIT, quitser);
485 }
486 SIGNAL2 (SIGPIPE, pipeser);
487 m_popen (moreproc, mhl_action != NULL);
488 ontty = PITTY;
489 } else {
490 SIGNAL (SIGINT, SIG_IGN);
491 SIGNAL2 (SIGQUIT, quitser);
492 ontty = ISTTY;
493 }
494 } else {
495 ontty = NOTTY;
496 }
497
498 mhl_format (form ? form : mhlformat, length, width);
499
500 if (vecp == 0) {
501 process (folder, NULL, 1, vecp = 1);
502 } else {
503 for (i = 0; i < vecp; i++)
504 process (folder, files[i], i + 1, vecp);
505 }
506
507 if (forwall) {
508 if (digest) {
509 fputs(delim4, stdout);
510 if (volume == 0) {
511 snprintf (buf, sizeof(buf), "End of %s Digest\n", digest);
512 } else {
513 snprintf (buf, sizeof(buf), "End of %s Digest [Volume %d Issue %d]\n",
514 digest, volume, issue);
515 }
516 i = strlen (buf);
517 for (cp = buf + i; i > 1; i--)
518 *cp++ = '*';
519 *cp++ = '\n';
520 *cp = 0;
521 fputs(buf, stdout);
522 }
523 else
524 printf ("\n------- End of Forwarded Message%s\n",
525 PLURALS(vecp));
526 }
527
528 fflush(stdout);
529 if(ferror(stdout)){
530 mhladios("output", "error writing");
531 }
532
533 if (clearflg > 0 && ontty == NOTTY)
534 nmh_clear_screen ();
535
536 if (ontty == PITTY)
537 m_pclose ();
538
539 return exitstat;
540 }
541
542
543 static void
544 mhl_format (char *file, int length, int width)
545 {
546 int i;
547 char *bp, **ip;
548 char *ap, name[NAMESZ];
549 struct mcomp *c1;
550 struct stat st;
551 FILE *fp;
552 static dev_t dev = 0;
553 static ino_t ino = 0;
554 static time_t mtime = 0;
555
556 if (fmthd != NULL) {
557 if (stat (etcpath (file), &st) != NOTOK
558 && mtime == st.st_mtime
559 && dev == st.st_dev
560 && ino == st.st_ino)
561 goto out;
562 free_queue (&fmthd, &fmttl);
563 }
564
565 if ((fp = fopen (etcpath (file), "r")) == NULL)
566 mhladios (file, "unable to open format file");
567
568 if (fstat (fileno (fp), &st) != NOTOK) {
569 mtime = st.st_mtime;
570 dev = st.st_dev;
571 ino = st.st_ino;
572 }
573
574 global.c_ovtxt = global.c_nfs = NULL;
575 global.c_fmt = NULL;
576 global.c_offset = 0;
577 global.c_ovoff = -1;
578 if ((i = sc_width ()) > 5)
579 global.c_width = i;
580 global.c_cwidth = -1;
581 if ((i = sc_length ()) > 5)
582 global.c_length = i - 1;
583 global.c_flags = BELL; /* BELL is default */
584 *(ip = ignores) = NULL;
585 filter_nargs = 0;
586
587 while (vfgets (fp, &ap) == OK) {
588 bp = ap;
589 if (*bp == ';')
590 continue;
591
592 trim_suffix_c(bp, '\n');
593
594 if (*bp == ':') {
595 (void) add_queue (&fmthd, &fmttl, NULL, bp + 1, CLEARTEXT);
596 continue;
597 }
598
599 parptr = bp;
600 strncpy (name, parse(), sizeof(name));
601 switch (*parptr) {
602 case '\0':
603 case ',':
604 case '=':
605 /*
606 * Split this list of fields to ignore, and copy
607 * it to the end of the current "ignores" list.
608 */
609 if (!strcasecmp (name, "ignores")) {
610 char **tmparray, **p;
611 int n = 0;
612
613 /* split the fields */
614 tmparray = brkstring (mh_xstrdup(++parptr), ",", NULL);
615
616 /* count number of fields split */
617 p = tmparray;
618 while (*p++)
619 n++;
620
621 /* copy pointers to split fields to ignores array */
622 ip = copyip (tmparray, ip, MAXARGS - num_ignores);
623 num_ignores += n;
624 continue;
625 }
626 parptr = bp;
627 while (*parptr) {
628 if (evalvar (&global))
629 mhladios (NULL, "format file syntax error: %s", bp);
630 if (*parptr)
631 parptr++;
632 }
633 continue;
634
635 case ':':
636 c1 = add_queue (&fmthd, &fmttl, name, NULL, INIT);
637 while (*parptr == ':' || *parptr == ',') {
638 parptr++;
639 if (evalvar (c1))
640 mhladios (NULL, "format file syntax error: %s", bp);
641 }
642 if (!c1->c_nfs && global.c_nfs) {
643 if (c1->c_flags & DATEFMT) {
644 if (global.c_flags & DATEFMT) {
645 c1->c_nfs = mh_xstrdup(global.c_nfs);
646 compile_formatfield(c1);
647 }
648 }
649 else
650 if (c1->c_flags & ADDRFMT) {
651 if (global.c_flags & ADDRFMT) {
652 c1->c_nfs = mh_xstrdup(global.c_nfs);
653 compile_formatfield(c1);
654 }
655 }
656 }
657 continue;
658
659 default:
660 mhladios (NULL, "format file syntax error: %s", bp);
661 }
662 }
663 fclose (fp);
664
665 if (mhldebug) {
666 for (c1 = fmthd; c1; c1 = c1->c_next) {
667 char buffer[BUFSIZ];
668
669 fprintf (stderr, "c1: name=\"%s\" text=\"%s\" ovtxt=\"%s\"\n",
670 c1->c_name, c1->c_text, c1->c_ovtxt);
671 fprintf (stderr, "\tnfs=0x%x fmt=0x%x\n",
672 (unsigned int)(unsigned long) c1->c_nfs,
673 (unsigned int)(unsigned long) c1->c_fmt);
674 fprintf (stderr, "\toffset=%d ovoff=%d width=%d cwidth=%d length=%d\n",
675 c1->c_offset, c1->c_ovoff, c1->c_width,
676 c1->c_cwidth, c1->c_length);
677 fprintf (stderr, "\tflags=%s\n",
678 snprintb (buffer, sizeof(buffer), (unsigned) c1->c_flags, LBITS));
679 }
680 }
681
682 out:
683 if (clearflg == 1) {
684 global.c_flags |= CLEARSCR;
685 } else {
686 if (clearflg == -1)
687 global.c_flags &= ~CLEARSCR;
688 }
689
690 switch (bellflg) { /* command line may override format file */
691 case 1:
692 global.c_flags |= BELL;
693 break;
694 case -1:
695 global.c_flags &= ~BELL;
696 break;
697 }
698
699 if (length)
700 global.c_length = length;
701 if (width)
702 global.c_width = width;
703 if (global.c_length < 5)
704 global.c_length = 10000;
705 if (global.c_width < 5)
706 global.c_width = 10000;
707 }
708
709
710 static int
711 evalvar (struct mcomp *c1)
712 {
713 char *cp, name[NAMESZ];
714 struct triple *ap;
715
716 if (!*parptr)
717 return 0;
718 strncpy (name, parse(), sizeof(name));
719
720 if (!strcasecmp (name, "component")) {
721 if (ptos (name, &c1->c_text))
722 return 1;
723 c1->c_flags &= ~NOCOMPONENT;
724 return 0;
725 }
726
727 if (!strcasecmp (name, "overflowtext"))
728 return ptos (name, &c1->c_ovtxt);
729
730 if (!strcasecmp (name, "formatfield")) {
731 if (ptos (name, &cp))
732 return 1;
733 c1->c_nfs = getcpy (new_fs (NULL, NULL, cp));
734 compile_formatfield(c1);
735 c1->c_flags |= FORMAT;
736 return 0;
737 }
738
739 if (!strcasecmp (name, "decode")) {
740 c1->c_nfs = getcpy (new_fs (NULL, NULL, "%(decode{text})"));
741 compile_formatfield(c1);
742 c1->c_flags |= FORMAT;
743 return 0;
744 }
745
746 if (!strcasecmp (name, "offset"))
747 return ptoi (name, &c1->c_offset);
748 if (!strcasecmp (name, "overflowoffset"))
749 return ptoi (name, &c1->c_ovoff);
750 if (!strcasecmp (name, "width"))
751 return ptoi (name, &c1->c_width);
752 if (!strcasecmp (name, "compwidth"))
753 return ptoi (name, &c1->c_cwidth);
754 if (!strcasecmp (name, "length"))
755 return ptoi (name, &c1->c_length);
756 if (!strcasecmp (name, "nodashstuffing"))
757 return (dashstuff = -1);
758
759 for (ap = triples; ap->t_name; ap++)
760 if (!strcasecmp (ap->t_name, name)) {
761 c1->c_flags |= ap->t_on;
762 c1->c_flags &= ~ap->t_off;
763 return 0;
764 }
765
766 if (!strcasecmp (name, "formatarg")) {
767 struct arglist *args;
768
769 if (ptos (name, &cp))
770 return 1;
771
772 if (! c1->c_name || strcasecmp (c1->c_name, "body")) {
773 inform("format filters are currently only supported on "
774 "the \"body\" component");
775 return 1;
776 }
777
778 NEW0(args);
779
780 if (arglist_tail)
781 arglist_tail->a_next = args;
782
783 arglist_tail = args;
784
785 if (! arglist_head)
786 arglist_head = args;
787
788 args->a_nfs = getcpy (new_fs (NULL, NULL, cp));
789 filter_nargs++;
790
791 return 0;
792 }
793
794 return 1;
795 }
796
797
798 static int
799 ptoi (char *name, int *i)
800 {
801 char *cp;
802
803 if (*parptr++ != '=' || !*(cp = parse ())) {
804 inform("missing argument to variable %s", name);
805 return 1;
806 }
807
808 *i = atoi (cp);
809 return 0;
810 }
811
812
813 static int
814 ptos (char *name, char **s)
815 {
816 char c, *cp;
817
818 if (*parptr++ != '=') {
819 inform("missing argument to variable %s", name);
820 return 1;
821 }
822
823 if (*parptr != '"') {
824 for (cp = parptr;
825 *parptr && *parptr != ':' && *parptr != ',';
826 parptr++)
827 continue;
828 } else {
829 for (cp = ++parptr; *parptr && *parptr != '"'; parptr++)
830 if (*parptr == QUOTE)
831 if (!*++parptr)
832 parptr--;
833 }
834 c = *parptr;
835 *parptr = 0;
836 *s = mh_xstrdup(cp);
837 if ((*parptr = c) == '"')
838 parptr++;
839 return 0;
840 }
841
842
843 static char *
844 parse (void)
845 {
846 int c;
847 char *cp;
848 static char result[NAMESZ];
849
850 for (cp = result; *parptr && (cp - result < NAMESZ); parptr++) {
851 c = *parptr;
852 if (!isalnum (c)
853 && c != '.'
854 && c != '-'
855 && c != '_'
856 && c !='['
857 && c != ']')
858 break;
859 *cp++ = c;
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 /* static to prevent "might be clobbered" warning from gcc 4.9.2: */
875 static char *cp;
876 static FILE *fp;
877 struct mcomp *c1;
878 struct stat st;
879 struct arglist *ap;
880 /* volatile to prevent "might be clobbered" warning from gcc: */
881 char *volatile fname2 = fname ? fname : "(stdin)";
882
883 cp = NULL;
884 fp = NULL;
885
886 switch (setjmp (env)) {
887 case OK:
888 if (fname) {
889 fp = mhl_action ? (*mhl_action) (fname) : fopen (fname, "r");
890 if (fp == NULL) {
891 advise (fname, "unable to open");
892 exitstat++;
893 return;
894 }
895 } else {
896 fp = stdin;
897 }
898 if (fstat(fileno(fp), &st) == 0) {
899 filesize = st.st_size;
900 } else {
901 filesize = 0;
902 }
903 cp = folder ? concat (folder, ":", fname2, NULL) : mh_xstrdup(fname2);
904 if (ontty != PITTY)
905 SIGNAL (SIGINT, intrser);
906 mhlfile (fp, cp, ofilen, ofilec);
907 free (cp);
908
909 for (ap = arglist_head; ap; ap = ap->a_next) {
910 fmt_free(ap->a_fmt, 0);
911 ap->a_fmt = NULL;
912 }
913
914 if (arglist_head)
915 fmt_free(NULL, 1);
916 /* FALLTHRU */
917
918 default:
919 if (ontty != PITTY)
920 SIGNAL (SIGINT, SIG_IGN);
921 if (mhl_action == NULL && fp != stdin && fp != NULL)
922 fclose (fp);
923 mh_xfree(holder.c_text);
924 holder.c_text = NULL;
925 free_queue (&msghd, &msgtl);
926 for (c1 = fmthd; c1; c1 = c1->c_next)
927 c1->c_flags &= ~HDROUTPUT;
928 break;
929 }
930
931 }
932
933
934 static void
935 mhlfile (FILE *fp, char *mname, int ofilen, int ofilec)
936 {
937 int state, bucket;
938 struct mcomp *c1, *c2, *c3;
939 char **ip, name[NAMESZ], buf[NMH_BUFSIZ];
940 m_getfld_state_t gstate;
941
942 compile_filterargs();
943
944 if (forwall) {
945 if (digest)
946 fputs(ofilen == 1 ? delim3 : delim4, stdout);
947 else {
948 printf ("\n-------");
949 if (ofilen == 1)
950 printf (" Forwarded Message%s", PLURALS(ofilec));
951 else
952 printf (" Message %d", ofilen);
953 printf ("\n\n");
954 }
955 } else {
956 switch (ontty) {
957 case PITTY:
958 if (ofilec > 1) {
959 if (ofilen > 1) {
960 if ((global.c_flags & CLEARSCR))
961 nmh_clear_screen ();
962 else
963 printf ("\n\n\n");
964 }
965 printf (">>> %s\n\n", mname);
966 }
967 break;
968
969 case ISTTY:
970 strncpy (buf, "\n", sizeof(buf));
971 if (ofilec > 1) {
972 if (SOprintf ("Press <return> to list \"%s\"...", mname)) {
973 if (ofilen > 1)
974 printf ("\n\n\n");
975 printf ("Press <return> to list \"%s\"...", mname);
976 }
977 fflush (stdout);
978 buf[0] = 0;
979 if (read (fileno (stdout), buf, sizeof(buf)) < 0) {
980 advise ("stdout", "read");
981 }
982 }
983 if (strchr(buf, '\n')) {
984 if ((global.c_flags & CLEARSCR))
985 nmh_clear_screen ();
986 }
987 else
988 putchar('\n');
989 break;
990
991 default:
992 if (ofilec > 1) {
993 if (ofilen > 1) {
994 printf ("\n\n\n");
995 if (clearflg > 0)
996 nmh_clear_screen ();
997 }
998 printf (">>> %s\n\n", mname);
999 }
1000 break;
1001 }
1002 }
1003
1004 gstate = m_getfld_state_init(fp);
1005 for (;;) {
1006 int bufsz = sizeof buf;
1007 switch (state = m_getfld2(&gstate, name, buf, &bufsz)) {
1008 case FLD:
1009 case FLDPLUS:
1010 bucket = fmt_addcomptext(name, buf);
1011 for (ip = ignores; *ip; ip++)
1012 if (!strcasecmp (name, *ip)) {
1013 while (state == FLDPLUS) {
1014 bufsz = sizeof buf;
1015 state = m_getfld2(&gstate, name, buf, &bufsz);
1016 fmt_appendcomp(bucket, name, buf);
1017 }
1018 break;
1019 }
1020 if (*ip)
1021 continue;
1022
1023 for (c2 = fmthd; c2; c2 = c2->c_next)
1024 if (!strcasecmp (FENDNULL(c2->c_name), name))
1025 break;
1026 c1 = NULL;
1027 if (!((c3 = c2 ? c2 : &global)->c_flags & SPLIT))
1028 for (c1 = msghd; c1; c1 = c1->c_next)
1029 if (!strcasecmp (FENDNULL(c1->c_name),
1030 FENDNULL(c3->c_name))) {
1031 c1->c_text =
1032 mcomp_add (c1->c_flags, buf, c1->c_text);
1033 break;
1034 }
1035 if (c1 == NULL)
1036 c1 = add_queue (&msghd, &msgtl, name, buf, 0);
1037 while (state == FLDPLUS) {
1038 bufsz = sizeof buf;
1039 state = m_getfld2(&gstate, name, buf, &bufsz);
1040 c1->c_text = add (buf, c1->c_text);
1041 fmt_appendcomp(bucket, name, buf);
1042 }
1043 if (c2 == NULL)
1044 c1->c_flags |= EXTRA;
1045 continue;
1046
1047 case BODY:
1048 case FILEEOF:
1049 row = column = 0;
1050 for (c1 = fmthd; c1; c1 = c1->c_next) {
1051 if (c1->c_flags & CLEARTEXT) {
1052 putcomp (c1, c1, ONECOMP);
1053 continue;
1054 }
1055 if (!c1->c_name ||
1056 !strcasecmp (c1->c_name, "messagename")) {
1057 holder.c_text = concat ("(Message ", mname, ")\n",
1058 NULL);
1059 putcomp (c1, &holder, ONECOMP);
1060 free (holder.c_text);
1061 holder.c_text = NULL;
1062 continue;
1063 }
1064 if (!c1->c_name || !strcasecmp (c1->c_name, "extras")) {
1065 for (c2 = msghd; c2; c2 = c2->c_next)
1066 if (c2->c_flags & EXTRA)
1067 putcomp (c1, c2, TWOCOMP);
1068 continue;
1069 }
1070 if (dobody && (!c1->c_name ||
1071 !strcasecmp (c1->c_name, "body"))) {
1072 if (c1->c_flags & FMTFILTER && state == BODY &&
1073 formatproc != NULL) {
1074 filterbody(c1, buf, sizeof(buf), state, gstate);
1075 } else {
1076 holder.c_text = mh_xmalloc (sizeof(buf));
1077 strncpy (holder.c_text, buf, sizeof(buf));
1078 while (state == BODY) {
1079 putcomp (c1, &holder, BODYCOMP);
1080 bufsz = sizeof buf;
1081 state = m_getfld2(&gstate, name, holder.c_text,
1082 &bufsz);
1083 }
1084 free (holder.c_text);
1085 holder.c_text = NULL;
1086 }
1087 continue;
1088 }
1089 for (c2 = msghd; c2; c2 = c2->c_next)
1090 if (!strcasecmp (FENDNULL(c2->c_name),
1091 FENDNULL(c1->c_name))) {
1092 putcomp (c1, c2, ONECOMP);
1093 if (!(c1->c_flags & SPLIT))
1094 break;
1095 }
1096 }
1097 m_getfld_state_destroy (&gstate);
1098 return;
1099
1100 case LENERR:
1101 case FMTERR:
1102 inform("format error in message %s", mname);
1103 exitstat++;
1104 m_getfld_state_destroy (&gstate);
1105 return;
1106
1107 default:
1108 mhladios (NULL, "getfld() returned %d", state);
1109 }
1110 }
1111 }
1112
1113
1114 static int
1115 mcomp_flags (char *name)
1116 {
1117 struct pair *ap;
1118
1119 for (ap = pairs; ap->p_name; ap++)
1120 if (!strcasecmp (ap->p_name, name))
1121 return (ap->p_flags);
1122
1123 return 0;
1124 }
1125
1126
1127 static char *
1128 mcomp_add (unsigned long flags, char *s1, char *s2)
1129 {
1130 char *dp;
1131
1132 if (!(flags & ADDRFMT))
1133 return add (s1, s2);
1134
1135 if (s2 && *(dp = s2 + strlen (s2) - 1) == '\n')
1136 *dp = 0;
1137
1138 return add (s1, add (",\n", s2));
1139 }
1140
1141
1142 struct pqpair {
1143 char *pq_text;
1144 char *pq_error;
1145 struct pqpair *pq_next;
1146 };
1147
1148
1149 static void
1150 mcomp_format (struct mcomp *c1, struct mcomp *c2)
1151 {
1152 int dat[5];
1153 char *ap, *cp;
1154 char error[BUFSIZ];
1155 struct pqpair *p, *q;
1156 struct pqpair pq;
1157 struct mailname *mp;
1158
1159 ap = c2->c_text;
1160 c2->c_text = NULL;
1161 dat[0] = 0;
1162 dat[1] = 0;
1163 dat[2] = filesize;
1164 dat[3] = BUFSIZ - 1;
1165 dat[4] = 0;
1166
1167 if (!(c1->c_flags & ADDRFMT)) {
1168 charstring_t scanl = charstring_create (BUFSIZ);
1169
1170 if (c1->c_c_text)
1171 c1->c_c_text->c_text = ap;
1172 if ((cp = strrchr(ap, '\n'))) /* drop ending newline */
1173 if (!cp[1])
1174 *cp = 0;
1175
1176 fmt_scan (c1->c_fmt, scanl, BUFSIZ - 1, dat, NULL);
1177 /* Don't need to append a newline, dctime() already did */
1178 c2->c_text = charstring_buffer_copy (scanl);
1179 charstring_free (scanl);
1180
1181 /* ap is now owned by the component struct, so do NOT free it here */
1182 return;
1183 }
1184
1185 (q = &pq)->pq_next = NULL;
1186 while ((cp = getname (ap))) {
1187 NEW0(p);
1188 if ((mp = getm (cp, NULL, 0, error, sizeof(error))) == NULL) {
1189 p->pq_text = mh_xstrdup(cp);
1190 p->pq_error = mh_xstrdup(error);
1191 } else {
1192 p->pq_text = getcpy (mp->m_text);
1193 mnfree (mp);
1194 }
1195 q = (q->pq_next = p);
1196 }
1197
1198 for (p = pq.pq_next; p; p = q) {
1199 charstring_t scanl = charstring_create (BUFSIZ);
1200 char *buffer;
1201
1202 if (c1->c_c_text) {
1203 c1->c_c_text->c_text = p->pq_text;
1204 p->pq_text = NULL;
1205 }
1206 if (c1->c_c_error) {
1207 c1->c_c_error->c_text = p->pq_error;
1208 p->pq_error = NULL;
1209 }
1210
1211 fmt_scan (c1->c_fmt, scanl, BUFSIZ - 1, dat, NULL);
1212 buffer = charstring_buffer_copy (scanl);
1213 if (*buffer) {
1214 if (c2->c_text)
1215 c2->c_text = add (",\n", c2->c_text);
1216 if (*(cp = buffer + strlen (buffer) - 1) == '\n')
1217 *cp = 0;
1218 c2->c_text = add (buffer, c2->c_text);
1219 }
1220 charstring_free (scanl);
1221
1222 mh_xfree(p->pq_text);
1223 mh_xfree(p->pq_error);
1224 q = p->pq_next;
1225 free(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 NEW0(c1);
1239 c1->c_flags = flags & ~INIT;
1240 if ((c1->c_name = name ? mh_xstrdup(name) : NULL))
1241 c1->c_flags |= mcomp_flags (c1->c_name);
1242 c1->c_text = text ? mh_xstrdup(text) : NULL;
1243 if (flags & INIT) {
1244 if (global.c_ovtxt)
1245 c1->c_ovtxt = mh_xstrdup(global.c_ovtxt);
1246 c1->c_offset = global.c_offset;
1247 c1->c_ovoff = global. c_ovoff;
1248 c1->c_width = c1->c_length = 0;
1249 c1->c_cwidth = global.c_cwidth;
1250 c1->c_flags |= global.c_flags & GFLAGS;
1251 }
1252 if (*head == NULL)
1253 *head = c1;
1254 if (*tail != NULL)
1255 (*tail)->c_next = c1;
1256 *tail = c1;
1257
1258 return c1;
1259 }
1260
1261
1262 static void
1263 free_queue (struct mcomp **head, struct mcomp **tail)
1264 {
1265 struct mcomp *c1, *c2;
1266
1267 for (c1 = *head; c1; c1 = c2) {
1268 c2 = c1->c_next;
1269 mh_xfree(c1->c_name);
1270 mh_xfree(c1->c_text);
1271 mh_xfree(c1->c_ovtxt);
1272 mh_xfree(c1->c_nfs);
1273 if (c1->c_fmt)
1274 fmt_free (c1->c_fmt, 0);
1275 free(c1);
1276 }
1277
1278 *head = *tail = NULL;
1279 }
1280
1281
1282 static void
1283 putcomp (struct mcomp *c1, struct mcomp *c2, int flag)
1284 {
1285 char *text; /* c1's text, or the name as a fallback. */
1286 char *trimmed_prefix;
1287 int count, cchdr;
1288 char *cp;
1289 const int utf8 = strcasecmp(get_charset(), "UTF-8") == 0;
1290
1291 if (! utf8 && flag != BODYCOMP) {
1292 /* Don't print 8-bit bytes in header field values if not in a
1293 UTF-8 locale, as required by RFC 6532. */
1294 c1->c_flags |= FORCE7BIT;
1295 }
1296
1297 text = c1->c_text ? c1->c_text : c1->c_name;
1298 /* Create a copy with trailing whitespace trimmed, for use with
1299 * blank lines. */
1300 trimmed_prefix = rtrim(add(text, NULL));
1301
1302 cchdr = 0;
1303 lm = 0;
1304 llim = c1->c_length ? c1->c_length : -1;
1305 wid = c1->c_width ? c1->c_width : global.c_width;
1306 ovoff = (c1->c_ovoff >= 0 ? c1->c_ovoff : global.c_ovoff)
1307 + c1->c_offset;
1308 if ((ovtxt = c1->c_ovtxt ? c1->c_ovtxt : global.c_ovtxt) == NULL)
1309 ovtxt = "";
1310 if (wid < ovoff + strlen (ovtxt) + 5)
1311 mhladios (NULL, "component: %s width(%d) too small for overflow(%d)",
1312 c1->c_name, wid, ovoff + strlen (ovtxt) + 5);
1313 onelp = NULL;
1314
1315 if (c1->c_flags & CLEARTEXT) {
1316 putstr (c1->c_flags & RTRIM ? rtrim (c1->c_text) : c1->c_text,
1317 c1->c_flags);
1318 putstr ("\n", c1->c_flags);
1319 return;
1320 }
1321
1322 if (c1->c_nfs && (c1->c_flags & (ADDRFMT | DATEFMT | FORMAT)))
1323 mcomp_format (c1, c2);
1324
1325 if (c1->c_flags & CENTER) {
1326 count = (c1->c_width ? c1->c_width : global.c_width)
1327 - c1->c_offset - strlen (c2->c_text);
1328 if (!(c1->c_flags & HDROUTPUT) && !(c1->c_flags & NOCOMPONENT))
1329 count -= strlen(text) + 2;
1330 lm = c1->c_offset + (count / 2);
1331 } else {
1332 if (c1->c_offset)
1333 lm = c1->c_offset;
1334 }
1335
1336 if (!(c1->c_flags & HDROUTPUT) && !(c1->c_flags & NOCOMPONENT)) {
1337 if (c1->c_flags & UPPERCASE) /* uppercase component also */
1338 to_upper(text);
1339 putstr(text, c1->c_flags);
1340 if (flag != BODYCOMP) {
1341 putstr (": ", c1->c_flags);
1342 if (!(c1->c_flags & SPLIT))
1343 c1->c_flags |= HDROUTPUT;
1344
1345 cchdr++;
1346 if ((count = c1->c_cwidth - strlen(text) - 2) > 0)
1347 while (count--)
1348 putstr (" ", c1->c_flags);
1349 }
1350 else
1351 c1->c_flags |= HDROUTPUT; /* for BODYCOMP */
1352 }
1353
1354 if (flag == TWOCOMP
1355 && !(c2->c_flags & HDROUTPUT)
1356 && !(c2->c_flags & NOCOMPONENT)) {
1357 if (c1->c_flags & UPPERCASE)
1358 to_upper(c2->c_name);
1359 putstr (c2->c_name, c1->c_flags);
1360 putstr (": ", c1->c_flags);
1361 if (!(c1->c_flags & SPLIT))
1362 c2->c_flags |= HDROUTPUT;
1363
1364 cchdr++;
1365 if ((count = c1->c_cwidth - strlen (c2->c_name) - 2) > 0)
1366 while (count--)
1367 putstr (" ", c1->c_flags);
1368 }
1369 if (c1->c_flags & UPPERCASE)
1370 to_upper(c2->c_text);
1371
1372 count = 0;
1373 if (cchdr) {
1374 if (flag == TWOCOMP)
1375 count = (c1->c_cwidth >= 0) ? c1->c_cwidth
1376 : (int) strlen (c2->c_name) + 2;
1377 else
1378 count = (c1->c_cwidth >= 0) ? (size_t) c1->c_cwidth
1379 : strlen(text) + 2;
1380 }
1381 count += c1->c_offset;
1382
1383 if ((cp = oneline (c2->c_text, c1->c_flags)))
1384 /* Output line, trimming trailing whitespace if requested. */
1385 putstr (c1->c_flags & RTRIM ? rtrim (cp) : cp, c1->c_flags);
1386 if (term == '\n')
1387 putstr ("\n", c1->c_flags);
1388 while ((cp = oneline (c2->c_text, c1->c_flags))) {
1389 lm = count;
1390 if (flag == BODYCOMP
1391 && !(c1->c_flags & NOCOMPONENT)) {
1392 /* Output component, trimming trailing whitespace if there
1393 is no text on the line. */
1394 if (*cp) {
1395 putstr(text, c1->c_flags);
1396 } else {
1397 putstr (trimmed_prefix, c1->c_flags);
1398 }
1399 }
1400 if (*cp) {
1401 /* Output line, trimming trailing whitespace if requested. */
1402 putstr (c1->c_flags & RTRIM ? rtrim (cp) : cp, c1->c_flags);
1403 }
1404 if (term == '\n')
1405 putstr ("\n", c1->c_flags);
1406 }
1407 if (flag == BODYCOMP && term == '\n')
1408 c1->c_flags &= ~HDROUTPUT; /* Buffer ended on a newline */
1409
1410 free (trimmed_prefix);
1411 }
1412
1413
1414 static char *
1415 oneline (char *stuff, unsigned long flags)
1416 {
1417 int spc;
1418 char *cp, *ret;
1419
1420 if (onelp == NULL)
1421 onelp = stuff;
1422 if (*onelp == 0)
1423 return (onelp = NULL);
1424
1425 ret = onelp;
1426 term = 0;
1427 if (flags & COMPRESS) {
1428 for (spc = 1, cp = ret; *onelp; onelp++)
1429 if (isspace ((unsigned char) *onelp)) {
1430 if (*onelp == '\n' && (!onelp[1] || (flags & ADDRFMT))) {
1431 term = '\n';
1432 *onelp++ = 0;
1433 break;
1434 }
1435 if (!spc) {
1436 *cp++ = ' ';
1437 spc++;
1438 }
1439 }
1440 else {
1441 *cp++ = *onelp;
1442 spc = 0;
1443 }
1444
1445 *cp = 0;
1446 }
1447 else {
1448 while (*onelp && *onelp != '\n')
1449 onelp++;
1450 if (*onelp == '\n') {
1451 term = '\n';
1452 *onelp++ = 0;
1453 }
1454 if (flags & LEFTADJUST)
1455 while (*ret == ' ' || *ret == '\t')
1456 ret++;
1457 }
1458 if (*onelp == 0 && term == '\n' && (flags & NONEWLINE))
1459 term = 0;
1460
1461 return ret;
1462 }
1463
1464
1465 static void
1466 putstr (char *string, unsigned long flags)
1467 {
1468 /* To not count, for the purpose of counting columns, all of
1469 the bytes of a multibyte character. */
1470 int char_len;
1471
1472 if (!column && lm > 0) {
1473 while (lm > 0)
1474 if (lm >= 8) {
1475 putch ('\t', flags);
1476 lm -= 8;
1477 }
1478 else {
1479 putch (' ', flags);
1480 lm--;
1481 }
1482 }
1483 lm = 0;
1484
1485 #ifdef MULTIBYTE_SUPPORT
1486 if (mbtowc (NULL, NULL, 0)) {} /* reset shift state */
1487 char_len = 0;
1488 #else
1489 NMH_UNUSED (char_len);
1490 #endif
1491
1492 while (*string) {
1493 flags &= ~INVISIBLE;
1494 #ifdef MULTIBYTE_SUPPORT
1495 /* mbtowc should never return 0, because *string is non-NULL. */
1496 if (char_len <= 0) {
1497 /* Find number of bytes in next character. */
1498 if ((char_len =
1499 mbtowc (NULL, string, (size_t) MB_CUR_MAX)) == -1) {
1500 char_len = 1;
1501 }
1502 } else {
1503 /* Multibyte character, after the first byte. */
1504 flags |= INVISIBLE;
1505 }
1506
1507 --char_len;
1508 #endif
1509 putch (*string++, flags);
1510 }
1511 }
1512
1513
1514 static void
1515 putch (char ch, unsigned long flags)
1516 {
1517 char buf[BUFSIZ];
1518
1519 if (llim == 0)
1520 return;
1521
1522 switch (ch) {
1523 case '\n':
1524 if (llim > 0)
1525 llim--;
1526 column = 0;
1527 row++;
1528 if (ontty != ISTTY || row != global.c_length)
1529 break;
1530 if (global.c_flags & BELL)
1531 putchar ('\007');
1532 fflush (stdout);
1533 buf[0] = 0;
1534 if (read (fileno (stdout), buf, sizeof(buf)) < 0) {
1535 advise ("stdout", "read");
1536 }
1537 if (strchr(buf, '\n')) {
1538 if (global.c_flags & CLEARSCR)
1539 nmh_clear_screen ();
1540 row = 0;
1541 } else {
1542 putchar ('\n');
1543 row = global.c_length / 3;
1544 }
1545 return;
1546
1547 case '\t':
1548 column |= 07;
1549 column++;
1550 break;
1551
1552 case '\b':
1553 column--;
1554 break;
1555
1556 case '\r':
1557 column = 0;
1558 break;
1559
1560 default:
1561 /*
1562 * If we are forwarding this message, and the first
1563 * column contains a dash, then add a dash and a space.
1564 */
1565 if (column == 0 && forwflg && (dashstuff >= 0) && ch == '-') {
1566 putchar ('-');
1567 putchar (' ');
1568 }
1569 /*
1570 * Increment the character count, unless
1571 * 1) In UTF-8 locale, this is other than the last byte of
1572 a multibyte character, or
1573 * 2) In C locale, will print a non-printable character.
1574 */
1575 if ((flags & FORCE7BIT) == 0) {
1576 /* UTF-8 locale */
1577 if ((flags & INVISIBLE) == 0) {
1578 /* If multibyte character, its first byte only. */
1579 ++column;
1580 }
1581 } else {
1582 /* If not an ASCII character, the replace character will be
1583 displayed. Count it. */
1584 if (! isascii((unsigned char) ch) || isprint((unsigned char) ch)) {
1585 ++column;
1586 }
1587 }
1588 break;
1589 }
1590
1591 if (column >= wid && (flags & NOWRAP) == 0) {
1592 putch ('\n', flags);
1593 if (ovoff > 0)
1594 lm = ovoff;
1595 putstr (FENDNULL(ovtxt), flags);
1596 putch (ch, flags);
1597 return;
1598 }
1599
1600 if (flags & FORCE7BIT && ! isascii((unsigned char) ch)) {
1601 putchar ('?');
1602 } else {
1603 putchar (ch);
1604 }
1605 }
1606
1607
1608 static void
1609 intrser (int i)
1610 {
1611 NMH_UNUSED (i);
1612
1613 discard (stdout);
1614 putchar ('\n');
1615 longjmp (env, DONE);
1616 }
1617
1618
1619 static void
1620 pipeser (int i)
1621 {
1622 NMH_UNUSED (i);
1623
1624 mhldone (NOTOK);
1625 }
1626
1627
1628 static void
1629 quitser (int i)
1630 {
1631 NMH_UNUSED (i);
1632
1633 putchar ('\n');
1634 fflush (stdout);
1635 mhldone (NOTOK);
1636 }
1637
1638
1639 static void
1640 mhladios (char *what, char *fmt, ...)
1641 {
1642 va_list ap;
1643
1644 va_start(ap, fmt);
1645 advertise (what, NULL, fmt, ap);
1646 va_end(ap);
1647 mhldone (1);
1648 }
1649
1650
1651 static void
1652 mhldone (int status)
1653 {
1654 exitstat = status;
1655 if (mhl_action)
1656 longjmp (mhlenv, DONE);
1657 else
1658 done (exitstat);
1659 }
1660
1661
1662 /*
1663 * Compile a format string used by the formatfield option and save it
1664 * for later.
1665 *
1666 * We will want the {text} (and possibly {error}) components for later,
1667 * so look for them and save them if we find them.
1668 */
1669
1670 static void
1671 compile_formatfield(struct mcomp *c1)
1672 {
1673 fmt_compile(c1->c_nfs, &c1->c_fmt, 1);
1674
1675 /*
1676 * As a note to myself and any other poor bastard who is looking through
1677 * this code in the future ....
1678 *
1679 * When the format hash table is reset later on (as it almost certainly
1680 * will be), there will still be references to these components in the
1681 * compiled format instructions. Thus these component references will
1682 * be free'd when the format instructions are free'd (by fmt_free()).
1683 *
1684 * So, in other words ... don't go free'ing them yourself!
1685 */
1686
1687 c1->c_c_text = fmt_findcomp("text");
1688 c1->c_c_error = fmt_findcomp("error");
1689 }
1690
1691 /*
1692 * Compile all of the arguments for our format list.
1693 *
1694 * Iterate through the linked list of format strings and compile them.
1695 * Note that we reset the format hash table before we start, but we do NOT
1696 * reset it between calls to fmt_compile().
1697 *
1698 */
1699
1700 static void
1701 compile_filterargs (void)
1702 {
1703 struct arglist *arg = arglist_head;
1704 struct comp *cptr;
1705 char **ap;
1706
1707 fmt_free(NULL, 1);
1708
1709 while (arg) {
1710 fmt_compile(arg->a_nfs, &arg->a_fmt, 0);
1711 arg = arg->a_next;
1712 }
1713
1714 /*
1715 * Search through and mark any components that are address components
1716 */
1717
1718 for (ap = addrcomps; *ap; ap++) {
1719 cptr = fmt_findcomp (*ap);
1720 if (cptr)
1721 cptr->c_type |= CT_ADDR;
1722 }
1723 }
1724
1725 /*
1726 * Filter the body of a message through a specified format program
1727 */
1728
1729 static void
1730 filterbody (struct mcomp *c1, char *buf, int bufsz, int state,
1731 m_getfld_state_t gstate)
1732 {
1733 struct mcomp holder;
1734 char name[NAMESZ];
1735 int fdinput[2], fdoutput[2], waitstat;
1736 ssize_t cc;
1737 pid_t writerpid, filterpid;
1738
1739 /*
1740 * Create pipes so we can communicate with our filter process.
1741 */
1742
1743 if (pipe(fdinput) < 0) {
1744 adios(NULL, "Unable to create input pipe");
1745 }
1746
1747 if (pipe(fdoutput) < 0) {
1748 adios(NULL, "Unable to create output pipe");
1749 }
1750
1751 /*
1752 * Here's what we're doing to do.
1753 *
1754 * - Fork ourselves and start writing data to the write side of the
1755 * input pipe (fdinput[1]).
1756 *
1757 * - Fork and exec our filter program. We set the standard input of
1758 * our filter program to be the read side of our input pipe (fdinput[0]).
1759 * Standard output is set to the write side of our output pipe
1760 * (fdoutput[1]).
1761 *
1762 * - We read from the read side of the output pipe (fdoutput[0]).
1763 *
1764 * We're forking because that's the simplest way to prevent any deadlocks.
1765 * (without doing something like switching to non-blocking I/O and using
1766 * select or poll, and I'm not interested in doing that).
1767 */
1768
1769 switch (writerpid = fork()) {
1770 case 0:
1771 /*
1772 * Our child process - just write to the filter input (fdinput[1]).
1773 * Close all other descriptors that we don't need.
1774 */
1775
1776 close(fdinput[0]);
1777 close(fdoutput[0]);
1778 close(fdoutput[1]);
1779
1780 /*
1781 * Call m_getfld2() until we're no longer in the BODY state
1782 */
1783
1784 while (state == BODY) {
1785 int bufsz2 = bufsz;
1786 if (write(fdinput[1], buf, strlen(buf)) < 0) {
1787 advise ("pipe output", "write");
1788 }
1789 state = m_getfld2(&gstate, name, buf, &bufsz2);
1790 }
1791
1792 /*
1793 * We should be done; time to exit.
1794 */
1795
1796 close(fdinput[1]);
1797 /*
1798 * Make sure we call _exit(), otherwise we may flush out the stdio
1799 * buffers that we have duplicated from the parent.
1800 */
1801 _exit(0);
1802 case -1:
1803 adios(NULL, "Unable to fork for filter writer process");
1804 break;
1805 }
1806
1807 /*
1808 * Fork and exec() our filter program, after redirecting standard in
1809 * and standard out appropriately.
1810 */
1811
1812 switch (filterpid = fork()) {
1813 char **args, *program;
1814 struct arglist *a;
1815 int i, dat[5], s, argp;
1816
1817 case 0:
1818 /*
1819 * Configure an argument array for us
1820 */
1821
1822 args = argsplit(formatproc, &program, &argp);
1823 args[argp + filter_nargs] = NULL;
1824 dat[0] = 0;
1825 dat[1] = 0;
1826 dat[2] = 0;
1827 dat[3] = BUFSIZ;
1828 dat[4] = 0;
1829
1830 /*
1831 * Pull out each argument and scan them.
1832 */
1833
1834 for (a = arglist_head, i = argp; a != NULL; a = a->a_next, i++) {
1835 charstring_t scanl = charstring_create (BUFSIZ);
1836
1837 fmt_scan(a->a_fmt, scanl, BUFSIZ, dat, NULL);
1838 args[i] = charstring_buffer_copy (scanl);
1839 charstring_free (scanl);
1840 /*
1841 * fmt_scan likes to put a trailing newline at the end of the
1842 * format string. If we have one, get rid of it.
1843 */
1844 s = strlen(args[i]);
1845 if (args[i][s - 1] == '\n')
1846 args[i][s - 1] = '\0';
1847
1848 if (mhldebug)
1849 fprintf(stderr, "filterarg: fmt=\"%s\", output=\"%s\"\n",
1850 a->a_nfs, args[i]);
1851 }
1852
1853 if (dup2(fdinput[0], STDIN_FILENO) < 0) {
1854 adios("formatproc", "Unable to dup2() standard input");
1855 }
1856 if (dup2(fdoutput[1], STDOUT_FILENO) < 0) {
1857 adios("formatproc", "Unable to dup2() standard output");
1858 }
1859
1860 /*
1861 * Close everything (especially the old input and output
1862 * descriptors, since they've been dup'd to stdin and stdout),
1863 * and exec the formatproc.
1864 */
1865
1866 close(fdinput[0]);
1867 close(fdinput[1]);
1868 close(fdoutput[0]);
1869 close(fdoutput[1]);
1870
1871 execvp(formatproc, args);
1872
1873 adios(formatproc, "Unable to execute filter");
1874
1875 break;
1876
1877 case -1:
1878 adios(NULL, "Unable to fork format program");
1879 }
1880
1881 /*
1882 * Close everything except our reader (fdoutput[0]);
1883 */
1884
1885 close(fdinput[0]);
1886 close(fdinput[1]);
1887 close(fdoutput[1]);
1888
1889 /*
1890 * As we read in this data, send it to putcomp
1891 */
1892
1893 holder.c_text = buf;
1894
1895 while ((cc = read(fdoutput[0], buf, bufsz - 1)) > 0) {
1896 buf[cc] = '\0';
1897 putcomp(c1, &holder, BODYCOMP);
1898 }
1899
1900 if (cc < 0) {
1901 adios(NULL, "reading from formatproc");
1902 }
1903
1904 /*
1905 * See if we got any errors along the way. I'm a little leery of calling
1906 * waitpid() without WNOHANG, but it seems to be the most correct solution.
1907 */
1908
1909 if (waitpid(filterpid, &waitstat, 0) < 0) {
1910 if (errno != ECHILD) {
1911 adios("filterproc", "Unable to determine status");
1912 }
1913 } else {
1914 if (! (WIFEXITED(waitstat) && WEXITSTATUS(waitstat) == 0)) {
1915 pidstatus(waitstat, stderr, "filterproc");
1916 }
1917 }
1918
1919 if (waitpid(writerpid, &waitstat, 0) < 0) {
1920 if (errno != ECHILD) {
1921 adios("writer process", "Unable to determine status");
1922 done(1);
1923 }
1924 } else {
1925 if (! (WIFEXITED(waitstat) && WEXITSTATUS(waitstat) == 0)) {
1926 pidstatus(waitstat, stderr, "writer process");
1927 done(1);
1928 }
1929 }
1930
1931 close(fdoutput[0]);
1932 }
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