git.marmaro.de Git - mmh/blob - uip/mhl.c

   1 /*
   2 ** mhl.c -- the nmh message listing program
   3 **
   4 ** This code is Copyright (c) 2002, by the authors of nmh.  See the
   5 ** COPYRIGHT file in the root directory of the nmh distribution for
   6 ** complete copyright information.
   7 */
   8
   9 #include <h/mh.h>
  10 #include <h/signals.h>
  11 #include <h/addrsbr.h>
  12 #include <h/fmt_scan.h>
  13 #include <h/tws.h>
  14 #include <h/utils.h>
  15 #include <setjmp.h>
  16 #include <signal.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 degernate 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 static struct swit mhlswitches[] = {
  44 #define BELLSW  0
  45         { "bell", 0 },
  46 #define NBELLSW  1
  47         { "nobell", 0 },
  48 #define CLRSW  2
  49         { "clear", 0 },
  50 #define NCLRSW  3
  51         { "noclear", 0 },
  52 #define FOLDSW  4
  53         { "folder +folder", 0 },
  54 #define FORMSW  5
  55         { "form formfile", 0 },
  56 #define PROGSW  6
  57         { "moreproc program", 0 },
  58 #define NPROGSW  7
  59         { "nomoreproc", 0 },
  60 #define LENSW  8
  61         { "length lines", 0 },
  62 #define WIDTHSW  9
  63         { "width columns", 0 },
  64 #define SLEEPSW  10
  65         { "sleep seconds",  0 },
  66 #define VERSIONSW  11
  67         { "version", 0 },
  68 #define HELPSW  12
  69         { "help", 0 },
  70 #define FORW1SW  13
  71         { "forward", -7 },
  72 #define FORW2SW  14
  73         { "forwall", -7 },
  74 #define DGSTSW  15
  75         { "digest list", -6 },
  76 #define VOLUMSW  16
  77         { "volume number", -6 },
  78 #define ISSUESW  17
  79         { "issue number", -5 },
  80 #define NBODYSW  18
  81         { "nobody", -6 },
  82         { NULL, 0 }
  83 };
  84
  85 #define NOCOMPONENT 0x000001  /* don't show component name   */
  86 #define UPPERCASE   0x000002  /* display in all upper case   */
  87 #define CENTER      0x000004  /* center line                 */
  88 #define CLEARTEXT   0x000008  /* cleartext                   */
  89 #define EXTRA       0x000010  /* an "extra" component        */
  90 #define HDROUTPUT   0x000020  /* already output              */
  91 #define CLEARSCR    0x000040  /* clear screen                */
  92 #define LEFTADJUST  0x000080  /* left justify multiple lines */
  93 #define COMPRESS    0x000100  /* compress text               */
  94 #define ADDRFMT     0x000200  /* contains addresses          */
  95 #define BELL        0x000400  /* sound bell at EOP           */
  96 #define DATEFMT     0x000800  /* contains dates              */
  97 #define FORMAT      0x001000  /* parse address/date/RFC-2047 field */
  98 #define INIT        0x002000  /* initialize component        */
  99 #define SPLIT       0x004000  /* split headers (don't concatenate) */
 100 #define NONEWLINE   0x008000  /* don't write trailing newline */
 101 #define LBITS       "\020\01NOCOMPONENT\02UPPERCASE\03CENTER\04CLEARTEXT\05EXTRA\06HDROUTPUT\07CLEARSCR\010LEFTADJUST\011COMPRESS\012ADDRFMT\013BELL\014DATEFMT\015FORMAT\016INIT\017SPLIT\020NONEWLINE"
 102 #define GFLAGS      (NOCOMPONENT | UPPERCASE | CENTER | LEFTADJUST | COMPRESS | SPLIT)
 103
 104 struct mcomp {
 105         char *c_name;  /* component name */
 106         char *c_text;  /* component text */
 107         char *c_ovtxt; /* text overflow indicator */
 108         char *c_nfs;   /* iff FORMAT */
 109         struct format *c_fmt;  /*  .. */
 110         int c_offset;  /* left margin indentation */
 111         int c_ovoff;   /* overflow indentation */
 112         int c_width;   /* width of field */
 113         int c_cwidth;  /* width of component */
 114         int c_length;  /* length in lines */
 115         long c_flags;
 116         struct mcomp *c_next;
 117 };
 118
 119 static struct mcomp *msghd = NULL;
 120 static struct mcomp *msgtl = NULL;
 121 static struct mcomp *fmthd = NULL;
 122 static struct mcomp *fmttl = NULL;
 123
 124 static struct mcomp global = {
 125         NULL, NULL, "", NULL, NULL, 0, -1, 80, -1, 40, BELL, 0
 126 };
 127
 128 static struct mcomp holder = {
 129         NULL, NULL, NULL, NULL, NULL, 0, 0, 0, 0, 0, NOCOMPONENT, 0
 130 };
 131
 132 struct pair {
 133         char *p_name;
 134         long p_flags;
 135 };
 136
 137 static struct pair pairs[] = {
 138         { "Date", DATEFMT },
 139         { "From", ADDRFMT },
 140         { "Sender", ADDRFMT },
 141         { "Reply-To", ADDRFMT },
 142         { "To", ADDRFMT },
 143         { "Cc", ADDRFMT },
 144         { "Bcc", ADDRFMT },
 145         { "Resent-Date", DATEFMT },
 146         { "Resent-From", ADDRFMT },
 147         { "Resent-Sender", ADDRFMT },
 148         { "Resent-Reply-To", ADDRFMT },
 149         { "Resent-To", ADDRFMT },
 150         { "Resent-Cc", ADDRFMT },
 151         { "Resent-Bcc", ADDRFMT },
 152         { NULL, 0 }
 153 };
 154
 155 struct triple {
 156         char *t_name;
 157         long t_on;
 158         long t_off;
 159 };
 160
 161 static struct triple triples[] = {
 162         { "nocomponent",  NOCOMPONENT, 0 },
 163         { "uppercase", UPPERCASE, 0 },
 164         { "nouppercase", 0, UPPERCASE },
 165         { "center", CENTER, 0 },
 166         { "nocenter", 0, CENTER },
 167         { "clearscreen", CLEARSCR, 0 },
 168         { "noclearscreen", 0, CLEARSCR },
 169         { "noclear", 0, CLEARSCR },
 170         { "leftadjust", LEFTADJUST, 0 },
 171         { "noleftadjust", 0, LEFTADJUST },
 172         { "compress", COMPRESS, 0 },
 173         { "nocompress", 0, COMPRESS },
 174         { "split", SPLIT, 0 },
 175         { "nosplit", 0, SPLIT },
 176         { "addrfield", ADDRFMT, DATEFMT },
 177         { "bell", BELL, 0 },
 178         { "nobell", 0, BELL },
 179         { "datefield", DATEFMT, ADDRFMT },
 180         { "newline", 0, NONEWLINE },
 181         { "nonewline", NONEWLINE, 0 },
 182         { NULL, 0, 0 }
 183 };
 184
 185
 186 static int bellflg   = 0;
 187 static int clearflg  = 0;
 188 static int dobody    = 1;
 189 static int forwflg   = 0;
 190 static int forwall   = 0;
 191
 192 static int sleepsw = NOTOK;
 193
 194 static char *digest = NULL;
 195 static int volume = 0;
 196 static int issue = 0;
 197
 198 static int exitstat = 0;
 199 static int mhldebug = 0;
 200
 201 #define PITTY  (-1)
 202 #define NOTTY  0
 203 #define ISTTY  1
 204 static int ontty = NOTTY;
 205
 206 static int row;
 207 static int column;
 208
 209 static int lm;
 210 static int llim;
 211 static int ovoff;
 212 static int term;
 213 static int wid;
 214
 215 static char *ovtxt;
 216
 217 static unsigned char *onelp;
 218
 219 static char *parptr;
 220
 221 static int num_ignores = 0;
 222 static char *ignores[MAXARGS];
 223
 224 static  jmp_buf env;
 225 static  jmp_buf mhlenv;
 226
 227 static char delim3[] =
 228 "\n----------------------------------------------------------------------\n\n";
 229 static char delim4[] = "\n------------------------------\n\n";
 230
 231 static FILE *(*mhl_action) () = (FILE *(*) ()) 0;
 232
 233
 234 /*
 235 ** Redefine a couple of functions.
 236 ** These are undefined later in the code.
 237 */
 238 #define adios mhladios
 239 #define done  mhldone
 240
 241 /*
 242 ** prototypes
 243 */
 244 static void mhl_format(char *, int, int);
 245 static int evalvar(struct mcomp *);
 246 static int ptoi(char *, int *);
 247 static int ptos(char *, char **);
 248 static char *parse(void);
 249 static void process(char *, char *, int, int);
 250 static void mhlfile(FILE *, char *, int, int);
 251 static int mcomp_flags(char *);
 252 static char *mcomp_add(long, char *, char *);
 253 static void mcomp_format(struct mcomp *, struct mcomp *);
 254 static struct mcomp *add_queue(struct mcomp **, struct mcomp **,
 255                 char *, char *, int);
 256 static void free_queue(struct mcomp **, struct mcomp **);
 257 static void putcomp(struct mcomp *, struct mcomp *, int);
 258 static char *oneline(char *, long);
 259 static void putstr(char *);
 260 static void putch(char);
 261 static RETSIGTYPE intrser(int);
 262 static RETSIGTYPE pipeser(int);
 263 static RETSIGTYPE quitser(int);
 264 static void mhladios(char *, char *, ...);
 265 static void mhldone(int);
 266 static void m_popen(char *);
 267
 268 void m_pclose(void);
 269
 270 void clear_screen(void);  /* from termsbr.c */
 271 int SOprintf(char *, ...);  /* from termsbr.c */
 272 int sc_width(void);  /* from termsbr.c */
 273 int sc_length(void);  /* from termsbr.c */
 274 int sc_hardcopy(void);  /* from termsbr.c */
 275
 276
 277 int
 278 main(int argc, char **argv)
 279 {
 280         int length = 0, nomore = 0;
 281         int i, width = 0, vecp = 0;
 282         char *cp, *folder = NULL, *form = NULL;
 283         char buf[BUFSIZ], *files[MAXARGS];
 284         char **argp, **arguments;
 285
 286 #ifdef LOCALE
 287         setlocale(LC_ALL, "");
 288 #endif
 289
 290         invo_name = mhbasename(argv[0]);
 291
 292         /* read user profile/context */
 293         context_read();
 294
 295         arguments = getarguments(invo_name, argc, argv, 1);
 296         argp = arguments;
 297
 298         if ((cp = getenv("MHLDEBUG")) && *cp)
 299                 mhldebug++;
 300
 301         while ((cp = *argp++)) {
 302                 if (*cp == '-') {
 303                         switch (smatch(++cp, mhlswitches)) {
 304                         case AMBIGSW:
 305                                 ambigsw(cp, mhlswitches);
 306                                 done(1);
 307                         case UNKWNSW:
 308                                 adios(NULL, "-%s unknown\n", cp);
 309
 310                         case HELPSW:
 311                                 snprintf(buf, sizeof(buf), "%s [switches] [files ...]", invo_name);
 312                                 print_help(buf, mhlswitches, 1);
 313                                 done(1);
 314                         case VERSIONSW:
 315                                 print_version(invo_name);
 316                                 done(1);
 317
 318                         case BELLSW:
 319                                 bellflg = 1;
 320                                 continue;
 321                         case NBELLSW:
 322                                 bellflg = -1;
 323                                 continue;
 324
 325                         case CLRSW:
 326                                 clearflg = 1;
 327                                 continue;
 328                         case NCLRSW:
 329                                 clearflg = -1;
 330                                 continue;
 331
 332                         case FOLDSW:
 333                                 if (!(folder = *argp++) || *folder == '-')
 334                                         adios(NULL, "missing argument to %s",
 335                                                         argp[-2]);
 336                                 continue;
 337                         case FORMSW:
 338                                 if (!(form = *argp++) || *form == '-')
 339                                         adios(NULL, "missing argument to %s",
 340                                                         argp[-2]);
 341                                 continue;
 342
 343                         case SLEEPSW:
 344                                 if (!(cp = *argp++) || *cp == '-')
 345                                         adios(NULL, "missing argument to %s",
 346                                                         argp[-2]);
 347                                 sleepsw = atoi(cp);  /* ZERO ok! */
 348                                 continue;
 349
 350                         case PROGSW:
 351                                 if (!(moreproc = *argp++) || *moreproc == '-')
 352                                         adios(NULL, "missing argument to %s",
 353                                                         argp[-2]);
 354                                 continue;
 355                         case NPROGSW:
 356                                 nomore++;
 357                                 continue;
 358
 359                         case LENSW:
 360                                 if (!(cp = *argp++) || *cp == '-')
 361                                         adios(NULL, "missing argument to %s",
 362                                                         argp[-2]);
 363                                 if ((length = atoi(cp)) < 1)
 364                                         adios(NULL, "bad argument %s %s",
 365                                                         argp[-2], cp);
 366                                 continue;
 367                         case WIDTHSW:
 368                                 if (!(cp = *argp++) || *cp == '-')
 369                                         adios(NULL, "missing argument to %s",
 370                                                         argp[-2]);
 371                                 if ((width = atoi(cp)) < 1)
 372                                         adios(NULL, "bad argument %s %s",
 373                                                         argp[-2], cp);
 374                                 continue;
 375
 376                         case DGSTSW:
 377                                 if (!(digest = *argp++) ||
 378                                                 *digest == '-')
 379                                         adios(NULL, "missing argument to %s",
 380                                                         argp[-2]);
 381                                 continue;
 382                         case ISSUESW:
 383                                 if (!(cp = *argp++) || *cp == '-')
 384                                         adios(NULL, "missing argument to %s",
 385                                                         argp[-2]);
 386                                 if ((issue = atoi(cp)) < 1)
 387                                         adios(NULL, "bad argument %s %s",
 388                                                         argp[-2], cp);
 389                                 continue;
 390                         case VOLUMSW:
 391                                 if (!(cp = *argp++) || *cp == '-')
 392                                         adios(NULL, "missing argument to %s",
 393                                                         argp[-2]);
 394                                 if ((volume = atoi(cp)) < 1)
 395                                         adios(NULL, "bad argument %s %s",
 396                                                         argp[-2], cp);
 397                                 continue;
 398
 399                         case FORW2SW:
 400                                 forwall++;  /* fall */
 401                         case FORW1SW:
 402                                 forwflg++;
 403                                 clearflg = -1;/* XXX */
 404                                 continue;
 405
 406                         case NBODYSW:
 407                                 dobody = 0;
 408                                 continue;
 409                         }
 410                 }
 411                 files[vecp++] = cp;
 412         }
 413
 414         if (!folder)
 415                 folder = getenv("mhfolder");
 416
 417         if (isatty(fileno(stdout))) {
 418                 if (!nomore && !sc_hardcopy() && moreproc && *moreproc != '\0') {
 419                         if (mhl_action) {
 420                                 SIGNAL(SIGINT, SIG_IGN);
 421                                 SIGNAL2(SIGQUIT, quitser);
 422                         }
 423                         SIGNAL2(SIGPIPE, pipeser);
 424                         m_popen(moreproc);
 425                         ontty = PITTY;
 426                 } else {
 427                         SIGNAL(SIGINT, SIG_IGN);
 428                         SIGNAL2(SIGQUIT, quitser);
 429                         ontty = ISTTY;
 430                 }
 431         } else {
 432                 ontty = NOTTY;
 433         }
 434
 435         mhl_format(form ? form : mhlformat, length, width);
 436
 437         if (vecp == 0) {
 438                 process(folder, NULL, 1, vecp = 1);
 439         } else {
 440                 for (i = 0; i < vecp; i++)
 441                         process(folder, files[i], i + 1, vecp);
 442         }
 443
 444         if (forwall) {
 445                 if (digest) {
 446                         printf("%s", delim4);
 447                         if (volume == 0) {
 448                                 snprintf(buf, sizeof(buf),
 449                                         "End of %s Digest\n", digest);
 450                         } else {
 451                                 snprintf(buf, sizeof(buf), "End of %s Digest [Volume %d Issue %d]\n", digest, volume, issue);
 452                         }
 453                         i = strlen(buf);
 454                         for (cp = buf + i; i > 1; i--)
 455                                 *cp++ = '*';
 456                         *cp++ = '\n';
 457                         *cp = 0;
 458                         printf("%s", buf);
 459                 } else
 460                         printf("\n------- End of Forwarded Message%s\n\n",
 461                                 vecp > 1 ? "s" : "");
 462         }
 463
 464         fflush(stdout);
 465         if (ferror(stdout)) {
 466                 adios("output", "error writing");
 467         }
 468
 469         if (clearflg > 0 && ontty == NOTTY)
 470                 clear_screen();
 471
 472         if (ontty == PITTY)
 473                 m_pclose();
 474
 475         return exitstat;
 476 }
 477
 478
 479 static void
 480 mhl_format(char *file, int length, int width)
 481 {
 482         int i;
 483         char *bp, *cp, **ip;
 484         char *ap, buffer[BUFSIZ], name[NAMESZ];
 485         struct mcomp *c1;
 486         struct stat st;
 487         FILE *fp;
 488         static dev_t dev = 0;
 489         static ino_t ino = 0;
 490         static time_t mtime = 0;
 491
 492         if (fmthd != NULL) {
 493                 if (stat(etcpath(file), &st) != NOTOK
 494                         && mtime == st.st_mtime
 495                         && dev == st.st_dev
 496                         && ino == st.st_ino)
 497                         goto out;
 498                 else
 499                         free_queue(&fmthd, &fmttl);
 500         }
 501
 502         if ((fp = fopen(etcpath(file), "r")) == NULL)
 503                 adios(file, "unable to open format file");
 504
 505         if (fstat(fileno(fp), &st) != NOTOK) {
 506                 mtime = st.st_mtime;
 507                 dev = st.st_dev;
 508                 ino = st.st_ino;
 509         }
 510
 511         global.c_ovtxt = global.c_nfs = NULL;
 512         global.c_fmt = NULL;
 513         global.c_offset = 0;
 514         global.c_ovoff = -1;
 515         if ((i = sc_width()) > 5)
 516                 global.c_width = i;
 517         global.c_cwidth = -1;
 518         if ((i = sc_length()) > 5)
 519                 global.c_length = i - 1;
 520         global.c_flags = BELL;  /* BELL is default */
 521         *(ip = ignores) = NULL;
 522
 523         while (vfgets(fp, &ap) == OK) {
 524                 bp = ap;
 525                 if (*bp == ';')
 526                         continue;
 527
 528                 if ((cp = strchr(bp, '\n')))
 529                         *cp = 0;
 530
 531                 if (*bp == ':') {
 532                         c1 = add_queue(&fmthd, &fmttl, NULL, bp + 1,
 533                                         CLEARTEXT);
 534                         continue;
 535                 }
 536
 537                 parptr = bp;
 538                 strncpy(name, parse(), sizeof(name));
 539                 switch(*parptr) {
 540                 case '\0':
 541                 case ',':
 542                 case '=':
 543                         /*
 544                         ** Split this list of fields to ignore, and copy
 545                         ** it to the end of the current "ignores" list.
 546                         */
 547                         if (!mh_strcasecmp(name, "ignores")) {
 548                                 char **tmparray, **p;
 549                                 int n = 0;
 550
 551                                 /* split the fields */
 552                                 tmparray = brkstring(getcpy(++parptr), ",",
 553                                                 NULL);
 554
 555                                 /* count number of fields split */
 556                                 p = tmparray;
 557                                 while (*p++)
 558                                         n++;
 559
 560                                 /*
 561                                 ** copy pointers to split fields
 562                                 ** to ignores array
 563                                 */
 564                                 ip = copyip(tmparray, ip,
 565                                                 MAXARGS - num_ignores);
 566                                 num_ignores += n;
 567                                 continue;
 568                         }
 569                         parptr = bp;
 570                         while (*parptr) {
 571                                 if (evalvar(&global))
 572                                         adios(NULL, "format file syntax error: %s", bp);
 573                                 if (*parptr)
 574                                         parptr++;
 575                         }
 576                         continue;
 577
 578                 case ':':
 579                         c1 = add_queue(&fmthd, &fmttl, name, NULL, INIT);
 580                         while (*parptr == ':' || *parptr == ',') {
 581                                 parptr++;
 582                                 if (evalvar(c1))
 583                                         adios(NULL, "format file syntax error: %s", bp);
 584                         }
 585                         if (!c1->c_nfs && global.c_nfs) {
 586                                 if ((c1->c_flags & DATEFMT) &&
 587                                                 (global.c_flags & DATEFMT)) {
 588                                         c1->c_nfs = getcpy(global.c_nfs);
 589                                 } else if ((c1->c_flags & ADDRFMT) &&
 590                                                 (global.c_flags & ADDRFMT)) {
 591                                         c1->c_nfs = getcpy(global.c_nfs);
 592                                 }
 593                         }
 594                         continue;
 595
 596                 default:
 597                         adios(NULL, "format file syntax error: %s", bp);
 598                 }
 599         }
 600         fclose(fp);
 601
 602         if (mhldebug) {
 603                 for (c1 = fmthd; c1; c1 = c1->c_next) {
 604                         fprintf(stderr, "c1: name=\"%s\" text=\"%s\" ovtxt=\"%s\"\n", c1->c_name, c1->c_text, c1->c_ovtxt);
 605                         fprintf(stderr, "\tnfs=0x%x fmt=0x%x\n", (unsigned int)(unsigned long) c1->c_nfs, (unsigned int)(unsigned long) c1->c_fmt);
 606                         fprintf(stderr, "\toffset=%d ovoff=%d width=%d cwidth=%d length=%d\n", c1->c_offset, c1->c_ovoff, c1->c_width, c1->c_cwidth, c1->c_length);
 607                         fprintf (stderr, "\tflags=%s\n", snprintb(buffer, sizeof(buffer), (unsigned) c1->c_flags, LBITS));
 608                 }
 609         }
 610
 611 out:
 612         if (clearflg == 1) {
 613                 global.c_flags |= CLEARSCR;
 614         } else {
 615                 if (clearflg == -1)
 616                         global.c_flags &= ~CLEARSCR;
 617         }
 618
 619         switch (bellflg) {  /* command line may override format file */
 620         case 1:
 621                 global.c_flags |= BELL;
 622                 break;
 623         case -1:
 624                 global.c_flags &= ~BELL;
 625                 break;
 626         }
 627
 628         if (length)
 629                 global.c_length = length;
 630         if (width)
 631                 global.c_width = width;
 632         if (global.c_length < 5)
 633                 global.c_length = 10000;
 634         if (global.c_width < 5)
 635                 global.c_width = 10000;
 636 }
 637
 638
 639 static int
 640 evalvar(struct mcomp *c1)
 641 {
 642         char *cp, name[NAMESZ];
 643         struct triple *ap;
 644
 645         if (!*parptr)
 646                 return 0;
 647         strncpy(name, parse(), sizeof(name));
 648
 649         if (!mh_strcasecmp(name, "component")) {
 650                 if (ptos(name, &c1->c_text))
 651                         return 1;
 652                 c1->c_flags &= ~NOCOMPONENT;
 653                 return 0;
 654         }
 655
 656         if (!mh_strcasecmp(name, "overflowtext"))
 657                 return ptos(name, &c1->c_ovtxt);
 658
 659         if (!mh_strcasecmp(name, "formatfield")) {
 660                 char *nfs;
 661
 662                 if (ptos(name, &cp))
 663                         return 1;
 664                 cp = concat("=", cp, NULL);
 665                 nfs = new_fs(cp, NULL);
 666                 free(cp);
 667                 c1->c_nfs = getcpy(nfs);
 668                 c1->c_flags |= FORMAT;
 669                 return 0;
 670         }
 671
 672         if (!mh_strcasecmp(name, "decode")) {
 673                 char *nfs;
 674
 675                 nfs = new_fs("=%(decode{text})", NULL);
 676                 c1->c_nfs = getcpy(nfs);
 677                 c1->c_flags |= FORMAT;
 678                 return 0;
 679         }
 680
 681         if (!mh_strcasecmp(name, "offset"))
 682                 return ptoi(name, &c1->c_offset);
 683         if (!mh_strcasecmp(name, "overflowoffset"))
 684                 return ptoi(name, &c1->c_ovoff);
 685         if (!mh_strcasecmp(name, "width"))
 686                 return ptoi(name, &c1->c_width);
 687         if (!mh_strcasecmp(name, "compwidth"))
 688                 return ptoi(name, &c1->c_cwidth);
 689         if (!mh_strcasecmp(name, "length"))
 690                 return ptoi(name, &c1->c_length);
 691
 692         for (ap = triples; ap->t_name; ap++)
 693                 if (!mh_strcasecmp(ap->t_name, name)) {
 694                         c1->c_flags |= ap->t_on;
 695                         c1->c_flags &= ~ap->t_off;
 696                         return 0;
 697                 }
 698
 699         return 1;
 700 }
 701
 702
 703 static int
 704 ptoi(char *name, int *i)
 705 {
 706         char *cp;
 707
 708         if (*parptr++ != '=' || !*(cp = parse())) {
 709                 advise(NULL, "missing argument to variable %s", name);
 710                 return 1;
 711         }
 712
 713         *i = atoi(cp);
 714         return 0;
 715 }
 716
 717
 718 static int
 719 ptos(char *name, char **s)
 720 {
 721         char c, *cp;
 722
 723         if (*parptr++ != '=') {
 724                 advise(NULL, "missing argument to variable %s", name);
 725                 return 1;
 726         }
 727
 728         if (*parptr != '"') {
 729                 for (cp = parptr; *parptr && *parptr != ':' && *parptr != ',';
 730                                 parptr++)
 731                         continue;
 732         } else {
 733                 for (cp = ++parptr; *parptr && *parptr != '"'; parptr++)
 734                         if (*parptr == QUOTE)
 735                                 if (!*++parptr)
 736                                         parptr--;
 737         }
 738         c = *parptr;
 739         *parptr = 0;
 740         *s = getcpy(cp);
 741         if ((*parptr = c) == '"')
 742                 parptr++;
 743         return 0;
 744 }
 745
 746
 747 static char *
 748 parse(void)
 749 {
 750         int c;
 751         char *cp;
 752         static char result[NAMESZ];
 753
 754         for (cp = result; *parptr && (cp - result < NAMESZ); parptr++) {
 755                 c = *parptr;
 756                 if (isalnum(c)
 757                                 || c == '.'
 758                                 || c == '-'
 759                                 || c == '_'
 760                                 || c == '['
 761                                 || c == ']')
 762                         *cp++ = c;
 763                 else
 764                         break;
 765         }
 766         *cp = '\0';
 767
 768         return result;
 769 }
 770
 771
 772 static void
 773 process(char *folder, char *fname, int ofilen, int ofilec)
 774 {
 775         char *cp = NULL;
 776         FILE *fp = NULL;
 777         struct mcomp *c1;
 778
 779         switch (setjmp(env)) {
 780         case OK:
 781                 if (fname) {
 782                         fp = mhl_action ? (*mhl_action) (fname) :
 783                                         fopen(fname, "r");
 784                         if (fp == NULL) {
 785                                 advise(fname, "unable to open");
 786                                 exitstat++;
 787                                 return;
 788                         }
 789                 } else {
 790                         fname = "(stdin)";
 791                         fp = stdin;
 792                 }
 793                 cp = folder ? concat(folder, ":", fname, NULL) : getcpy(fname);
 794                 if (ontty != PITTY)
 795                         SIGNAL(SIGINT, intrser);
 796                 mhlfile(fp, cp, ofilen, ofilec);  /* FALL THROUGH! */
 797
 798         default:
 799                 if (ontty != PITTY)
 800                         SIGNAL(SIGINT, SIG_IGN);
 801                 if (mhl_action == NULL && fp != stdin)
 802                         fclose(fp);
 803                 free(cp);
 804                 if (holder.c_text) {
 805                         free(holder.c_text);
 806                         holder.c_text = NULL;
 807                 }
 808                 free_queue(&msghd, &msgtl);
 809                 for (c1 = fmthd; c1; c1 = c1->c_next)
 810                         c1->c_flags &= ~HDROUTPUT;
 811                 break;
 812         }
 813 }
 814
 815
 816 static void
 817 mhlfile(FILE *fp, char *mname, int ofilen, int ofilec)
 818 {
 819         int state;
 820         struct mcomp *c1, *c2, *c3;
 821         char **ip, name[NAMESZ], buf[BUFSIZ];
 822
 823         if (forwall) {
 824                 if (digest)
 825                         printf("%s", ofilen == 1 ? delim3 : delim4);
 826                 else {
 827                         printf("\n-------");
 828                         if (ofilen == 1)
 829                                 printf(" Forwarded Message%s",
 830                                                 ofilec > 1 ? "s" : "");
 831                         else
 832                                 printf(" Message %d", ofilen);
 833                         printf("\n\n");
 834                 }
 835         } else {
 836                 switch (ontty) {
 837                 case PITTY:
 838                         if (ofilec > 1) {
 839                                 if (ofilen > 1) {
 840                                         if ((global.c_flags & CLEARSCR))
 841                                                 clear_screen();
 842                                         else
 843                                                 printf("\n\n\n");
 844                                 }
 845                                 printf(">>> %s\n\n", mname);
 846                         }
 847                         break;
 848
 849                 case ISTTY:
 850                         strncpy(buf, "\n", sizeof(buf));
 851                         if (ofilec > 1) {
 852                                 if (SOprintf("Press <return> to list \"%s\"...", mname)) {
 853                                         if (ofilen > 1)
 854                                                 printf("\n\n\n");
 855                                         printf("Press <return> to list \"%s\"...", mname);
 856                                 }
 857                                 fflush(stdout);
 858                                 buf[0] = 0;
 859                                 read(fileno(stdout), buf, sizeof(buf));
 860                         }
 861                         if (strchr(buf, '\n')) {
 862                                 if ((global.c_flags & CLEARSCR))
 863                                         clear_screen();
 864                         } else
 865                                 printf("\n");
 866                         break;
 867
 868                 default:
 869                         if (ofilec > 1) {
 870                                 if (ofilen > 1) {
 871                                         printf("\n\n\n");
 872                                         if (clearflg > 0)
 873                                                 clear_screen();
 874                                 }
 875                                 printf(">>> %s\n\n", mname);
 876                         }
 877                         break;
 878                 }
 879         }
 880
 881         for (state = FLD;;) {
 882                 switch (state = m_getfld(state, name, buf, sizeof(buf), fp)) {
 883                 case FLD:
 884                 case FLDPLUS:
 885                         for (ip = ignores; *ip; ip++)
 886                                 if (!mh_strcasecmp(name, *ip)) {
 887                                         while (state == FLDPLUS)
 888                                                 state = m_getfld(state, name, buf, sizeof(buf), fp);
 889                                         break;
 890                                 }
 891                         if (*ip)
 892                                 continue;
 893
 894                         for (c2 = fmthd; c2; c2 = c2->c_next)
 895                                 if (!mh_strcasecmp(c2->c_name, name))
 896                                         break;
 897                         c1 = NULL;
 898                         if (!((c3 = c2 ? c2 : &global)->c_flags & SPLIT))
 899                                 for (c1 = msghd; c1; c1 = c1->c_next)
 900                                         if (!mh_strcasecmp(c1->c_name,
 901                                                         c3->c_name)) {
 902                                                 c1->c_text = mcomp_add(c1->c_flags, buf, c1->c_text);
 903                                                 break;
 904                                         }
 905                         if (c1 == NULL)
 906                                 c1 = add_queue(&msghd, &msgtl, name, buf, 0);
 907                         while (state == FLDPLUS) {
 908                                 state = m_getfld(state, name, buf,
 909                                                 sizeof(buf), fp);
 910                                 c1->c_text = add(buf, c1->c_text);
 911                         }
 912                         if (c2 == NULL)
 913                                 c1->c_flags |= EXTRA;
 914                         continue;
 915
 916                 case BODY:
 917                 case FILEEOF:
 918                         row = column = 0;
 919                         for (c1 = fmthd; c1; c1 = c1->c_next) {
 920                                 if (c1->c_flags & CLEARTEXT) {
 921                                         putcomp(c1, c1, ONECOMP);
 922                                         continue;
 923                                 }
 924                                 if (!mh_strcasecmp(c1->c_name, "messagename")) {
 925                                         holder.c_text = concat("(Message ",
 926                                                         mname, ")\n", NULL);
 927                                         putcomp(c1, &holder, ONECOMP);
 928                                         free(holder.c_text);
 929                                         holder.c_text = NULL;
 930                                         continue;
 931                                 }
 932                                 if (!mh_strcasecmp(c1->c_name, "extras")) {
 933                                         for (c2 = msghd; c2; c2 = c2->c_next)
 934                                                 if (c2->c_flags & EXTRA)
 935                                                         putcomp(c1, c2, TWOCOMP);
 936                                         continue;
 937                                 }
 938                                 if (dobody && !mh_strcasecmp(c1->c_name, "body")) {
 939                                         holder.c_text = mh_xmalloc(sizeof(buf));
 940                                         strncpy(holder.c_text, buf, sizeof(buf));
 941                                         while (state == BODY) {
 942                                                 putcomp(c1, &holder, BODYCOMP);
 943                                                 state = m_getfld(state, name, holder.c_text, sizeof(buf), fp);
 944                                         }
 945                                         free(holder.c_text);
 946                                         holder.c_text = NULL;
 947                                         continue;
 948                                 }
 949                                 for (c2 = msghd; c2; c2 = c2->c_next)
 950                                         if (!mh_strcasecmp(c2->c_name,
 951                                                         c1->c_name)) {
 952                                                 putcomp(c1, c2, ONECOMP);
 953                                                 if (!(c1->c_flags & SPLIT))
 954                                                         break;
 955                                         }
 956                         }
 957                         return;
 958
 959                 case LENERR:
 960                 case FMTERR:
 961                         advise(NULL, "format error in message %s", mname);
 962                         exitstat++;
 963                         return;
 964
 965                 default:
 966                         adios(NULL, "getfld() returned %d", state);
 967                 }
 968         }
 969 }
 970
 971
 972 static int
 973 mcomp_flags(char *name)
 974 {
 975         struct pair *ap;
 976
 977         for (ap = pairs; ap->p_name; ap++)
 978                 if (!mh_strcasecmp(ap->p_name, name))
 979                         return (ap->p_flags);
 980
 981         return 0;
 982 }
 983
 984
 985 static char *
 986 mcomp_add(long flags, char *s1, char *s2)
 987 {
 988         char *dp;
 989
 990         if (!(flags & ADDRFMT))
 991                 return add(s1, s2);
 992
 993         if (s2 && *(dp = s2 + strlen(s2) - 1) == '\n')
 994                 *dp = 0;
 995
 996         return add(s1, add(",\n", s2));
 997 }
 998
 999
1000 struct pqpair {
1001         char *pq_text;
1002         char *pq_error;
1003         struct pqpair *pq_next;
1004 };
1005
1006
1007 static void
1008 mcomp_format(struct mcomp *c1, struct mcomp *c2)
1009 {
1010         int dat[5];
1011         char *ap, *cp;
1012         char buffer[BUFSIZ], error[BUFSIZ];
1013         struct comp *cptr;
1014         struct pqpair *p, *q;
1015         struct pqpair pq;
1016         struct mailname *mp;
1017
1018         ap = c2->c_text;
1019         c2->c_text = NULL;
1020         dat[0] = 0;
1021         dat[1] = 0;
1022         dat[2] = 0;
1023         dat[3] = sizeof(buffer) - 1;
1024         dat[4] = 0;
1025         fmt_compile(c1->c_nfs, &c1->c_fmt);
1026
1027         if (!(c1->c_flags & ADDRFMT)) {
1028                 FINDCOMP(cptr, "text");
1029                 if (cptr)
1030                         cptr->c_text = ap;
1031                 if ((cp = strrchr(ap, '\n')))  /* drop ending newline */
1032                         if (!cp[1])
1033                                 *cp = 0;
1034
1035                 fmt_scan(c1->c_fmt, buffer, sizeof(buffer) - 1, dat);
1036                 /* Don't need to append a newline, dctime() already did */
1037                 c2->c_text = getcpy(buffer);
1038
1039                 free(ap);
1040                 return;
1041         }
1042
1043         (q = &pq)->pq_next = NULL;
1044         while ((cp = getname(ap))) {
1045                 if ((p = (struct pqpair *)
1046                                 calloc((size_t) 1, sizeof(*p))) == NULL)
1047                         adios(NULL, "unable to allocate pqpair memory");
1048
1049                 if ((mp = getm(cp, NULL, 0, AD_NAME, error)) == NULL) {
1050                         p->pq_text = getcpy(cp);
1051                         p->pq_error = getcpy(error);
1052                 } else {
1053                         p->pq_text = getcpy(mp->m_text);
1054                         mnfree(mp);
1055                 }
1056                 q = (q->pq_next = p);
1057         }
1058
1059         for (p = pq.pq_next; p; p = q) {
1060                 FINDCOMP(cptr, "text");
1061                 if (cptr)
1062                         cptr->c_text = p->pq_text;
1063                 FINDCOMP(cptr, "error");
1064                 if (cptr)
1065                         cptr->c_text = p->pq_error;
1066
1067                 fmt_scan(c1->c_fmt, buffer, sizeof(buffer) - 1, dat);
1068                 if (*buffer) {
1069                         if (c2->c_text)
1070                                 c2->c_text = add(",\n", c2->c_text);
1071                         if (*(cp = buffer + strlen(buffer) - 1) == '\n')
1072                                 *cp = 0;
1073                         c2->c_text = add(buffer, c2->c_text);
1074                 }
1075
1076                 free(p->pq_text);
1077                 if (p->pq_error)
1078                         free(p->pq_error);
1079                 q = p->pq_next;
1080                 free((char *) p);
1081         }
1082
1083         c2->c_text = add("\n", c2->c_text);
1084         free (ap);
1085 }
1086
1087
1088 static struct mcomp *
1089 add_queue(struct mcomp **head, struct mcomp **tail, char *name,
1090                 char *text, int flags)
1091 {
1092         struct mcomp *c1;
1093
1094         if ((c1 = (struct mcomp *) calloc((size_t) 1, sizeof(*c1))) == NULL)
1095                 adios(NULL, "unable to allocate comp memory");
1096
1097         c1->c_flags = flags & ~INIT;
1098         if ((c1->c_name = name ? getcpy(name) : NULL))
1099                 c1->c_flags |= mcomp_flags(c1->c_name);
1100         c1->c_text = text ? getcpy(text) : NULL;
1101         if (flags & INIT) {
1102                 if (global.c_ovtxt)
1103                         c1->c_ovtxt = getcpy(global.c_ovtxt);
1104                 c1->c_offset = global.c_offset;
1105                 c1->c_ovoff = global. c_ovoff;
1106                 c1->c_width = c1->c_length = 0;
1107                 c1->c_cwidth = global.c_cwidth;
1108                 c1->c_flags |= global.c_flags & GFLAGS;
1109         }
1110         if (*head == NULL)
1111                 *head = c1;
1112         if (*tail != NULL)
1113                 (*tail)->c_next = c1;
1114         *tail = c1;
1115
1116         return c1;
1117 }
1118
1119
1120 static void
1121 free_queue(struct mcomp **head, struct mcomp **tail)
1122 {
1123         struct mcomp *c1, *c2;
1124
1125         for (c1 = *head; c1; c1 = c2) {
1126                 c2 = c1->c_next;
1127                 if (c1->c_name)
1128                         free(c1->c_name);
1129                 if (c1->c_text)
1130                         free(c1->c_text);
1131                 if (c1->c_ovtxt)
1132                         free(c1->c_ovtxt);
1133                 if (c1->c_nfs)
1134                         free(c1->c_nfs);
1135                 if (c1->c_fmt)
1136                         free((char *) c1->c_fmt);
1137                 free((char *) c1);
1138         }
1139
1140         *head = *tail = NULL;
1141 }
1142
1143
1144 static void
1145 putcomp(struct mcomp *c1, struct mcomp *c2, int flag)
1146 {
1147         int count, cchdr;
1148         unsigned char *cp;
1149
1150         cchdr = 0;
1151         lm = 0;
1152         llim = c1->c_length ? c1->c_length : -1;
1153         wid = c1->c_width ? c1->c_width : global.c_width;
1154         ovoff = (c1->c_ovoff >= 0 ? c1->c_ovoff : global.c_ovoff)
1155                         + c1->c_offset;
1156         if ((ovtxt = c1->c_ovtxt ? c1->c_ovtxt : global.c_ovtxt) == NULL)
1157                 ovtxt = "";
1158         if (wid < ovoff + strlen(ovtxt) + 5)
1159                 adios(NULL, "component: %s width(%d) too small for overflow(%d)", c1->c_name, wid, ovoff + strlen(ovtxt) + 5);
1160         onelp = NULL;
1161
1162         if (c1->c_flags & CLEARTEXT) {
1163                 putstr(c1->c_text);
1164                 putstr("\n");
1165                 return;
1166         }
1167
1168         if (c1->c_nfs && (c1->c_flags & (ADDRFMT | DATEFMT | FORMAT)))
1169                 mcomp_format(c1, c2);
1170
1171         if (c1->c_flags & CENTER) {
1172                 count = (c1->c_width ? c1->c_width : global.c_width)
1173                                 - c1->c_offset - strlen(c2->c_text);
1174                 if (!(c1->c_flags & HDROUTPUT) && !(c1->c_flags & NOCOMPONENT))
1175                         count -= strlen(c1->c_text ? c1->c_text : c1->c_name)
1176                                         + 2;
1177                 lm = c1->c_offset + (count / 2);
1178         } else {
1179                 if (c1->c_offset)
1180                         lm = c1->c_offset;
1181         }
1182
1183         if (!(c1->c_flags & HDROUTPUT) && !(c1->c_flags & NOCOMPONENT)) {
1184                 if (c1->c_flags & UPPERCASE)  /* uppercase component also */
1185                         for (cp = (c1->c_text ? c1->c_text : c1->c_name); *cp; cp++)
1186                                 if (islower(*cp))
1187                                         *cp = toupper(*cp);
1188                 putstr(c1->c_text ? c1->c_text : c1->c_name);
1189                 if (flag != BODYCOMP) {
1190                         putstr(": ");
1191                         if (!(c1->c_flags & SPLIT))
1192                                 c1->c_flags |= HDROUTPUT;
1193
1194                 cchdr++;
1195                 if ((count = c1->c_cwidth -
1196                         strlen(c1->c_text ? c1->c_text : c1->c_name) - 2) > 0)
1197                         while (count--)
1198                                 putstr(" ");
1199                 } else
1200                         c1->c_flags |= HDROUTPUT;  /* for BODYCOMP */
1201         }
1202
1203         if (flag == TWOCOMP && !(c2->c_flags & HDROUTPUT)
1204                 && !(c2->c_flags & NOCOMPONENT)) {
1205                 if (c1->c_flags & UPPERCASE)
1206                         for (cp = c2->c_name; *cp; cp++)
1207                                 if (islower(*cp))
1208                                         *cp = toupper(*cp);
1209                 putstr(c2->c_name);
1210                 putstr(": ");
1211                 if (!(c1->c_flags & SPLIT))
1212                         c2->c_flags |= HDROUTPUT;
1213
1214                 cchdr++;
1215                 if ((count = c1->c_cwidth - strlen(c2->c_name) - 2) > 0)
1216                         while (count--)
1217                                 putstr(" ");
1218         }
1219         if (c1->c_flags & UPPERCASE)
1220                 for (cp = c2->c_text; *cp; cp++)
1221                         if (islower(*cp))
1222                                 *cp = toupper(*cp);
1223
1224         count = 0;
1225         if (cchdr) {
1226                 if (flag == TWOCOMP)
1227                         count = (c1->c_cwidth >= 0) ?
1228                                         c1->c_cwidth : strlen(c2->c_name) + 2;
1229                 else
1230                         count = (c1->c_cwidth >= 0) ?
1231                                         c1->c_cwidth : strlen(c1->c_text ?
1232                                         c1->c_text : c1->c_name) + 2;
1233         }
1234         count += c1->c_offset;
1235
1236         if ((cp = oneline(c2->c_text, c1->c_flags)))
1237            putstr(cp);
1238         if (term == '\n')
1239                 putstr("\n");
1240         while ((cp = oneline(c2->c_text, c1->c_flags))) {
1241                 lm = count;
1242                 if (flag == BODYCOMP && !(c1->c_flags & NOCOMPONENT))
1243                         putstr(c1->c_text ? c1->c_text : c1->c_name);
1244                 if (*cp)
1245                         putstr(cp);
1246                 if (term == '\n')
1247                         putstr("\n");
1248         }
1249         if (flag == BODYCOMP && term == '\n')
1250                 c1->c_flags &= ~HDROUTPUT;  /* Buffer ended on a newline */
1251 }
1252
1253
1254 static char *
1255 oneline(char *stuff, long flags)
1256 {
1257         int spc;
1258         char *cp, *ret;
1259
1260         if (onelp == NULL)
1261                 onelp = stuff;
1262         if (*onelp == 0)
1263                 return (onelp = NULL);
1264
1265         ret = onelp;
1266         term = 0;
1267         if (flags & COMPRESS) {
1268                 for (spc = 1, cp = ret; *onelp; onelp++)
1269                         if (isspace(*onelp)) {
1270                                 if (*onelp == '\n' &&
1271                                                 (!onelp[1] ||
1272                                                 (flags & ADDRFMT))) {
1273                                         term = '\n';
1274                                         *onelp++ = 0;
1275                                         break;
1276                                 } else if (!spc) {
1277                                         *cp++ = ' ';
1278                                         spc++;
1279                                 }
1280                         } else {
1281                                 *cp++ = *onelp;
1282                                 spc = 0;
1283                         }
1284
1285                 *cp = 0;
1286         } else {
1287                 while (*onelp && *onelp != '\n')
1288                         onelp++;
1289                 if (*onelp == '\n') {
1290                         term = '\n';
1291                         *onelp++ = 0;
1292                 }
1293                 if (flags & LEFTADJUST)
1294                         while (*ret == ' ' || *ret == '\t')
1295                                 ret++;
1296         }
1297         if (*onelp == 0 && term == '\n' && (flags & NONEWLINE))
1298                 term = 0;
1299
1300         return ret;
1301 }
1302
1303
1304 static void
1305 putstr(char *string)
1306 {
1307         if (!column && lm > 0) {
1308                 while (lm > 0)
1309                         if (lm >= 8) {
1310                                 putch('\t');
1311                                 lm -= 8;
1312                         } else {
1313                                 putch(' ');
1314                                 lm--;
1315                         }
1316         }
1317         lm = 0;
1318         while (*string)
1319                 putch(*string++);
1320 }
1321
1322
1323 static void
1324 putch(char ch)
1325 {
1326         char buf[BUFSIZ];
1327
1328         if (llim == 0)
1329                 return;
1330
1331         switch (ch) {
1332         case '\n':
1333                 if (llim > 0)
1334                         llim--;
1335                 column = 0;
1336                 row++;
1337                 if (ontty != ISTTY || row != global.c_length)
1338                         break;
1339                 if (global.c_flags & BELL)
1340                         putchar('\007');
1341                 fflush(stdout);
1342                 buf[0] = 0;
1343                 read(fileno(stdout), buf, sizeof(buf));
1344                 if (strchr(buf, '\n')) {
1345                         if (global.c_flags & CLEARSCR)
1346                                 clear_screen();
1347                         row = 0;
1348                 } else {
1349                         putchar('\n');
1350                         row = global.c_length / 3;
1351                 }
1352                 return;
1353
1354         case '\t':
1355                 column |= 07;
1356                 column++;
1357                 break;
1358
1359         case '\b':
1360                 column--;
1361                 break;
1362
1363         case '\r':
1364                 column = 0;
1365                 break;
1366
1367         default:
1368                 /*
1369                 ** If we are forwarding this message, and the first
1370                 ** column contains a dash, then add a dash and a space.
1371                 */
1372                 if (column == 0 && forwflg && ch == '-') {
1373                         putchar('-');
1374                         putchar(' ');
1375                 }
1376                 if (ch >= ' ')
1377                         column++;
1378                 break;
1379         }
1380
1381         if (column >= wid) {
1382                 putch('\n');
1383                 if (ovoff > 0)
1384                         lm = ovoff;
1385                 putstr(ovtxt ? ovtxt : "");
1386                 putch(ch);
1387                 return;
1388         }
1389
1390         putchar(ch);
1391 }
1392
1393
1394 static RETSIGTYPE
1395 intrser(int i)
1396 {
1397 #ifndef RELIABLE_SIGNALS
1398         SIGNAL(SIGINT, intrser);
1399 #endif
1400
1401         discard(stdout);
1402         putchar('\n');
1403         longjmp(env, DONE);
1404 }
1405
1406
1407 static RETSIGTYPE
1408 pipeser(int i)
1409 {
1410 #ifndef RELIABLE_SIGNALS
1411         SIGNAL(SIGPIPE, pipeser);
1412 #endif
1413
1414         done(NOTOK);
1415 }
1416
1417
1418 static RETSIGTYPE
1419 quitser(int i)
1420 {
1421 #ifndef RELIABLE_SIGNALS
1422         SIGNAL(SIGQUIT, quitser);
1423 #endif
1424
1425         putchar('\n');
1426         fflush(stdout);
1427         done(NOTOK);
1428 }
1429
1430
1431 #undef adios
1432 #undef done
1433
1434 static void
1435 mhladios(char *what, char *fmt, ...)
1436 {
1437         va_list ap;
1438
1439         va_start(ap, fmt);
1440         advertise(what, NULL, fmt, ap);
1441         va_end(ap);
1442         mhldone(1);
1443 }
1444
1445
1446 static void
1447 mhldone(int status)
1448 {
1449         exitstat = status;
1450         if (mhl_action)
1451                 longjmp(mhlenv, DONE);
1452         else
1453                 done(exitstat);
1454 }
1455
1456
1457 static int m_pid = NOTOK;
1458 static int sd = NOTOK;
1459
1460 static void
1461 m_popen(char *name)
1462 {
1463         int pd[2];
1464
1465         if (mhl_action && (sd = dup(fileno(stdout))) == NOTOK)
1466                 adios("standard output", "unable to dup()");
1467
1468         if (pipe(pd) == NOTOK)
1469                 adios("pipe", "unable to");
1470
1471         switch (m_pid = fork()) {
1472         case NOTOK:
1473                 adios("fork", "unable to");
1474
1475         case OK:
1476                 SIGNAL(SIGINT, SIG_DFL);
1477                 SIGNAL(SIGQUIT, SIG_DFL);
1478
1479                 close(pd[1]);
1480                 if (pd[0] != fileno(stdin)) {
1481                         dup2(pd[0], fileno(stdin));
1482                         close(pd[0]);
1483                 }
1484                 execlp(name, mhbasename(name), NULL);
1485                 fprintf(stderr, "unable to exec ");
1486                 perror(name);
1487                 _exit(-1);
1488
1489         default:
1490                 close(pd[0]);
1491                 if (pd[1] != fileno(stdout)) {
1492                         dup2(pd[1], fileno(stdout));
1493                         close(pd[1]);
1494                 }
1495         }
1496 }
1497
1498
1499 void
1500 m_pclose(void)
1501 {
1502         if (m_pid == NOTOK)
1503                 return;
1504
1505         if (sd != NOTOK) {
1506                 fflush(stdout);
1507                 if (dup2(sd, fileno(stdout)) == NOTOK)
1508                         adios("standard output", "unable to dup2()");
1509
1510                 clearerr(stdout);
1511                 close(sd);
1512                 sd = NOTOK;
1513         }
1514         else
1515                 fclose(stdout);
1516
1517         pidwait(m_pid, OK);
1518         m_pid = NOTOK;
1519 }