auxlily.c

   1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
   2  *@ Auxiliary functions.
   3  *
   4  * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
   5  * Copyright (c) 2012 - 2014 Steffen "Daode" Nurpmeso <sdaoden@users.sf.net>.
   6  */
   7 /*
   8  * Copyright (c) 1980, 1993
   9  *      The Regents of the University of California.  All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *      This product includes software developed by the University of
  22  *      California, Berkeley and its contributors.
  23  * 4. Neither the name of the University nor the names of its contributors
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  37  * SUCH DAMAGE.
  38  */
  39
  40 #ifndef HAVE_AMALGAMATION
  41 # include "nail.h"
  42 #endif
  43
  44 #include <sys/utsname.h>
  45
  46 #include <ctype.h>
  47 #include <dirent.h>
  48 #include <fcntl.h>
  49
  50 #ifdef HAVE_SOCKETS
  51 # ifdef HAVE_IPV6
  52 #  include <sys/socket.h>
  53 # endif
  54
  55 # include <netdb.h>
  56 #endif
  57
  58 #ifdef HAVE_MD5
  59 # include "md5.h"
  60 #endif
  61
  62 /* Create an ISO 6429 (ECMA-48/ANSI) terminal control escape sequence */
  63 #ifdef HAVE_COLOUR
  64 static char *  _colour_iso6429(char const *wish);
  65 #endif
  66
  67 /* {hold,rele}_all_sigs() */
  68 static size_t     _alls_depth;
  69 static sigset_t   _alls_nset, _alls_oset;
  70
  71 /* {hold,rele}_sigs() */
  72 static size_t     _hold_sigdepth;
  73 static sigset_t   _hold_nset, _hold_oset;
  74
  75 #ifdef HAVE_COLOUR
  76 static char *
  77 _colour_iso6429(char const *wish)
  78 {
  79    char const * const wish_orig = wish;
  80    char *xwish, *cp, cfg[3] = {0, 0, 0};
  81
  82    /* Since we use salloc(), reuse the strcomma() buffer also for the return
  83     * value, ensure we have enough room for that */
  84    {
  85       size_t i = strlen(wish) + 1;
  86       xwish = salloc(MAX(i, sizeof("\033[1;30;40m")));
  87       memcpy(xwish, wish, i);
  88       wish = xwish;
  89    }
  90
  91    /* Iterate over the colour spec */
  92    while ((cp = strcomma(&xwish, TRU1)) != NULL) {
  93       char *y, *x = strchr(cp, '=');
  94       if (x == NULL) {
  95 jbail:
  96          fprintf(stderr, tr(527,
  97             "Invalid colour specification \"%s\": >>> %s <<<\n"),
  98             wish_orig, cp);
  99          continue;
 100       }
 101       *x++ = '\0';
 102
 103       /* TODO convert the ft/fg/bg parser into a table-based one! */
 104       if (!asccasecmp(cp, "ft")) {
 105          if (!asccasecmp(x, "bold"))
 106             cfg[0] = '1';
 107          else if (!asccasecmp(x, "inverse"))
 108             cfg[0] = '7';
 109          else if (!asccasecmp(x, "underline"))
 110             cfg[0] = '4';
 111          else
 112             goto jbail;
 113       } else if (!asccasecmp(cp, "fg")) {
 114          y = cfg + 1;
 115          goto jiter_colour;
 116       } else if (!asccasecmp(cp, "bg")) {
 117          y = cfg + 2;
 118 jiter_colour:
 119          if (!asccasecmp(x, "black"))
 120             *y = '0';
 121          else if (!asccasecmp(x, "blue"))
 122             *y = '4';
 123          else if (!asccasecmp(x, "green"))
 124             *y = '2';
 125          else if (!asccasecmp(x, "red"))
 126             *y = '1';
 127          else if (!asccasecmp(x, "brown"))
 128             *y = '3';
 129          else if (!asccasecmp(x, "magenta"))
 130             *y = '5';
 131          else if (!asccasecmp(x, "cyan"))
 132             *y = '6';
 133          else if (!asccasecmp(x, "white"))
 134             *y = '7';
 135          else
 136             goto jbail;
 137       } else
 138          goto jbail;
 139    }
 140
 141    /* Restore our salloc() buffer, create return value */
 142    xwish = UNCONST(wish);
 143    if (cfg[0] || cfg[1] || cfg[2]) {
 144       xwish[0] = '\033';
 145       xwish[1] = '[';
 146       xwish += 2;
 147       if (cfg[0])
 148          *xwish++ = cfg[0];
 149       if (cfg[1]) {
 150          if (cfg[0])
 151             *xwish++ = ';';
 152          xwish[0] = '3';
 153          xwish[1] = cfg[1];
 154          xwish += 2;
 155       }
 156       if (cfg[2]) {
 157          if (cfg[0] || cfg[1])
 158             *xwish++ = ';';
 159          xwish[0] = '4';
 160          xwish[1] = cfg[2];
 161          xwish += 2;
 162       }
 163       *xwish++ = 'm';
 164    }
 165    *xwish = '\0';
 166    return UNCONST(wish);
 167 }
 168 #endif /* HAVE_COLOUR */
 169
 170 FL void
 171 panic(char const *format, ...)
 172 {
 173    va_list ap;
 174
 175    fprintf(stderr, tr(1, "Panic: "));
 176
 177    va_start(ap, format);
 178    vfprintf(stderr, format, ap);
 179    va_end(ap);
 180
 181    fputs("\n", stderr);
 182    fflush(stderr);
 183    exit(EXIT_ERR);
 184 }
 185
 186 #ifdef HAVE_DEBUG
 187 FL void
 188 warn(char const *format, ...)
 189 {
 190    va_list ap;
 191
 192    fprintf(stderr, tr(1, "Panic: "));
 193
 194    va_start(ap, format);
 195    vfprintf(stderr, format, ap);
 196    va_end(ap);
 197
 198    fputs("\n", stderr);
 199    fflush(stderr);
 200 }
 201 #endif
 202
 203 FL sighandler_type
 204 safe_signal(int signum, sighandler_type handler)
 205 {
 206    struct sigaction nact, oact;
 207
 208    nact.sa_handler = handler;
 209    sigemptyset(&nact.sa_mask);
 210    nact.sa_flags = 0;
 211 #ifdef SA_RESTART
 212    nact.sa_flags |= SA_RESTART;
 213 #endif
 214    return ((sigaction(signum, &nact, &oact) != 0) ? SIG_ERR : oact.sa_handler);
 215 }
 216
 217 FL void
 218 hold_all_sigs(void)
 219 {
 220    if (_alls_depth++ == 0) {
 221       sigfillset(&_alls_nset);
 222       sigdelset(&_alls_nset, SIGABRT);
 223 #ifdef SIGBUS
 224       sigdelset(&_alls_nset, SIGBUS);
 225 #endif
 226       sigdelset(&_alls_nset, SIGCHLD);
 227       sigdelset(&_alls_nset, SIGFPE);
 228       sigdelset(&_alls_nset, SIGILL);
 229       sigdelset(&_alls_nset, SIGKILL);
 230       sigdelset(&_alls_nset, SIGSEGV);
 231       sigdelset(&_alls_nset, SIGSTOP);
 232       sigprocmask(SIG_BLOCK, &_alls_nset, &_alls_oset);
 233    }
 234 }
 235
 236 FL void
 237 rele_all_sigs(void)
 238 {
 239    if (--_alls_depth == 0)
 240       sigprocmask(SIG_SETMASK, &_alls_oset, (sigset_t*)NULL);
 241 }
 242
 243 FL void
 244 hold_sigs(void)
 245 {
 246    if (_hold_sigdepth++ == 0) {
 247       sigemptyset(&_hold_nset);
 248       sigaddset(&_hold_nset, SIGHUP);
 249       sigaddset(&_hold_nset, SIGINT);
 250       sigaddset(&_hold_nset, SIGQUIT);
 251       sigprocmask(SIG_BLOCK, &_hold_nset, &_hold_oset);
 252    }
 253 }
 254
 255 FL void
 256 rele_sigs(void)
 257 {
 258    if (--_hold_sigdepth == 0)
 259       sigprocmask(SIG_SETMASK, &_hold_oset, NULL);
 260 }
 261
 262 /*
 263  * Touch the named message by setting its MTOUCH flag.
 264  * Touched messages have the effect of not being sent
 265  * back to the system mailbox on exit.
 266  */
 267 FL void
 268 touch(struct message *mp)
 269 {
 270
 271         mp->m_flag |= MTOUCH;
 272         if ((mp->m_flag & MREAD) == 0)
 273                 mp->m_flag |= MREAD|MSTATUS;
 274 }
 275
 276 /*
 277  * Test to see if the passed file name is a directory.
 278  * Return true if it is.
 279  */
 280 FL int
 281 is_dir(char const *name)
 282 {
 283         struct stat sbuf;
 284
 285         if (stat(name, &sbuf) < 0)
 286                 return(0);
 287         return(S_ISDIR(sbuf.st_mode));
 288 }
 289
 290 /*
 291  * Count the number of arguments in the given string raw list.
 292  */
 293 FL int
 294 argcount(char **argv)
 295 {
 296         char **ap;
 297
 298         for (ap = argv; *ap++ != NULL;)
 299                 ;
 300         return ap - argv - 1;
 301 }
 302
 303 FL char *
 304 colalign(const char *cp, int col, int fill, int *cols_decr_used_or_null)
 305 {
 306         int col_orig = col, n, sz;
 307         char *nb, *np;
 308
 309         np = nb = salloc(mb_cur_max * strlen(cp) + col + 1);
 310         while (*cp) {
 311 #ifdef HAVE_WCWIDTH
 312                 if (mb_cur_max > 1) {
 313                         wchar_t wc;
 314
 315                         if ((sz = mbtowc(&wc, cp, mb_cur_max)) < 0) {
 316                                 n = sz = 1;
 317                         } else {
 318                                 if ((n = wcwidth(wc)) < 0)
 319                                         n = 1;
 320                         }
 321                 } else
 322 #endif
 323                 {
 324                         n = sz = 1;
 325                 }
 326                 if (n > col)
 327                         break;
 328                 col -= n;
 329                 if (sz == 1 && spacechar(*cp)) {
 330                         *np++ = ' ';
 331                         cp++;
 332                 } else
 333                         while (sz--)
 334                                 *np++ = *cp++;
 335         }
 336
 337         if (fill && col != 0) {
 338                 if (fill > 0) {
 339                         memmove(nb + col, nb, (size_t)(np - nb));
 340                         memset(nb, ' ', col);
 341                 } else
 342                         memset(np, ' ', col);
 343                 np += col;
 344                 col = 0;
 345         }
 346
 347         *np = '\0';
 348         if (cols_decr_used_or_null != NULL)
 349                 *cols_decr_used_or_null -= col_orig - col;
 350         return nb;
 351 }
 352
 353 FL char const *
 354 get_pager(void)
 355 {
 356         char const *cp;
 357
 358         cp = ok_vlook(PAGER);
 359         if (cp == NULL || *cp == '\0')
 360                 cp = XPAGER;
 361         return cp;
 362 }
 363
 364 FL size_t
 365 paging_seems_sensible(void)
 366 {
 367         size_t ret = 0;
 368         char const *cp;
 369
 370         if (IS_TTY_SESSION() && (cp = ok_vlook(crt)) != NULL)
 371                 ret = (*cp != '\0') ? (size_t)atol(cp) : (size_t)scrnheight;
 372         return ret;
 373 }
 374
 375 FL void
 376 page_or_print(FILE *fp, size_t lines)
 377 {
 378         size_t rows;
 379         int c;
 380
 381         fflush_rewind(fp);
 382
 383         if ((rows = paging_seems_sensible()) != 0 && lines == 0) {
 384                 while ((c = getc(fp)) != EOF)
 385                         if (c == '\n' && ++lines > rows)
 386                                 break;
 387                 rewind(fp);
 388         }
 389
 390         if (rows != 0 && lines >= rows)
 391                 run_command(get_pager(), 0, fileno(fp), -1, NULL, NULL, NULL);
 392         else
 393                 while ((c = getc(fp)) != EOF)
 394                         putchar(c);
 395 }
 396
 397 FL enum protocol
 398 which_protocol(const char *name)
 399 {
 400         register const char *cp;
 401         char    *np;
 402         size_t  sz;
 403         struct stat     st;
 404         enum protocol   p;
 405
 406         if (name[0] == '%' && name[1] == ':')
 407                 name += 2;
 408         for (cp = name; *cp && *cp != ':'; cp++)
 409                 if (!alnumchar(*cp&0377))
 410                         goto file;
 411         if (cp[0] == ':' && cp[1] == '/' && cp[2] == '/') {
 412                 if (strncmp(name, "pop3://", 7) == 0)
 413 #ifdef HAVE_POP3
 414                         return PROTO_POP3;
 415 #else
 416                         fprintf(stderr,
 417                                 tr(216, "No POP3 support compiled in.\n"));
 418 #endif
 419                 if (strncmp(name, "pop3s://", 8) == 0)
 420 #ifdef HAVE_SSL
 421                         return PROTO_POP3;
 422 #else
 423                         fprintf(stderr,
 424                                 tr(225, "No SSL support compiled in.\n"));
 425 #endif
 426                 if (strncmp(name, "imap://", 7) == 0)
 427 #ifdef HAVE_IMAP
 428                         return PROTO_IMAP;
 429 #else
 430                         fprintf(stderr,
 431                                 tr(269, "No IMAP support compiled in.\n"));
 432 #endif
 433                 if (strncmp(name, "imaps://", 8) == 0)
 434 #ifdef HAVE_SSL
 435                         return PROTO_IMAP;
 436 #else
 437                         fprintf(stderr,
 438                                 tr(225, "No SSL support compiled in.\n"));
 439 #endif
 440                 return PROTO_UNKNOWN;
 441         } else {
 442                 /* TODO This is the de facto maildir code and thus belongs
 443                  * TODO into maildir! */
 444         file:   p = PROTO_FILE;
 445                 np = ac_alloc((sz = strlen(name)) + 5);
 446                 memcpy(np, name, sz + 1);
 447                 if (stat(name, &st) == 0) {
 448                         if (S_ISDIR(st.st_mode)) {
 449                                 strcpy(&np[sz], "/tmp");
 450                                 if (stat(np, &st) == 0 && S_ISDIR(st.st_mode)) {
 451                                         strcpy(&np[sz], "/new");
 452                                         if (stat(np, &st) == 0 &&
 453                                                         S_ISDIR(st.st_mode)) {
 454                                                 strcpy(&np[sz], "/cur");
 455                                                 if (stat(np, &st) == 0 &&
 456                                                         S_ISDIR(st.st_mode))
 457                                                     p = PROTO_MAILDIR;
 458                                         }
 459                                 }
 460                         }
 461                 } else {
 462                         strcpy(&np[sz], ".gz");
 463                         if (stat(np, &st) < 0) {
 464                                 strcpy(&np[sz], ".bz2");
 465                                 if (stat(np, &st) < 0) {
 466                                         if ((cp = ok_vlook(newfolders)) != NULL &&
 467                                                 strcmp(cp, "maildir") == 0)
 468                                         p = PROTO_MAILDIR;
 469                                 }
 470                         }
 471                 }
 472                 ac_free(np);
 473                 return p;
 474         }
 475 }
 476
 477 FL ui32_t
 478 torek_hash(char const *name)
 479 {
 480    /* Chris Torek's hash.
 481     * NOTE: need to change *at least* create-okey-map.pl when changing the
 482     * algorithm!! */
 483         ui32_t h = 0;
 484
 485         while (*name != '\0') {
 486                 h *= 33;
 487                 h += *name++;
 488         }
 489         return h;
 490 }
 491
 492 FL unsigned
 493 pjw(const char *cp)
 494 {
 495         unsigned        h = 0, g;
 496
 497         cp--;
 498         while (*++cp) {
 499                 h = (h << 4 & 0xffffffff) + (*cp&0377);
 500                 if ((g = h & 0xf0000000) != 0) {
 501                         h = h ^ g >> 24;
 502                         h = h ^ g;
 503                 }
 504         }
 505         return h;
 506 }
 507
 508 FL long
 509 nextprime(long n)
 510 {
 511         const long      primes[] = {
 512                         509, 1021, 2039, 4093, 8191, 16381, 32749, 65521,
 513                         131071, 262139, 524287, 1048573, 2097143, 4194301,
 514                         8388593, 16777213, 33554393, 67108859, 134217689,
 515                         268435399, 536870909, 1073741789, 2147483647
 516                 };
 517         long    mprime = 7;
 518         size_t  i;
 519
 520         for (i = 0; i < sizeof primes / sizeof *primes; i++)
 521                 if ((mprime = primes[i]) >= (n < 65536 ? n*4 :
 522                                         n < 262144 ? n*2 : n))
 523                         break;
 524         if (i == sizeof primes / sizeof *primes)
 525                 mprime = n;     /* not so prime, but better than failure */
 526         return mprime;
 527 }
 528
 529 FL int
 530 expand_shell_escape(char const **s, bool_t use_nail_extensions)
 531 {
 532    char const *xs = *s;
 533    int c, n;
 534
 535    if ((c = *xs & 0xFF) == '\0')
 536       goto jleave;
 537    ++xs;
 538    if (c != '\\')
 539       goto jleave;
 540
 541    switch ((c = *xs & 0xFF)) {
 542    case '\\':                    break;
 543    case 'a':   c = '\a';         break;
 544    case 'b':   c = '\b';         break;
 545    case 'c':   c = PROMPT_STOP;  break;
 546    case 'f':   c = '\f';         break;
 547    case 'n':   c = '\n';         break;
 548    case 'r':   c = '\r';         break;
 549    case 't':   c = '\t';         break;
 550    case 'v':   c = '\v';         break;
 551    case '0':
 552       for (++xs, c = 0, n = 4; --n > 0 && octalchar(*xs); ++xs) {
 553          c <<= 3;
 554          c |= *xs - '0';
 555       }
 556       goto jleave;
 557    /* S-nail extension for nice (get)prompt(()) support */
 558    case '&':
 559    case '?':
 560    case '$':
 561    case '@':
 562       if (use_nail_extensions) {
 563          switch (c) {
 564          case '&':   c = ok_blook(bsdcompat) ? '&' : '?';   break;
 565          case '?':   c = exec_last_comm_error ? '1' : '0';  break;
 566          case '$':   c = PROMPT_DOLLAR;                     break;
 567          case '@':   c = PROMPT_AT;                         break;
 568          }
 569          break;
 570       }
 571       /* FALLTHRU */
 572    case '\0':
 573       /* A sole <backslash> at EOS is treated as-is! */
 574       /* FALLTHRU */
 575    default:
 576       c = '\\';
 577       goto jleave;
 578    }
 579    ++xs;
 580 jleave:
 581    *s = xs;
 582    return c;
 583 }
 584
 585 FL char *
 586 getprompt(void)
 587 {
 588    static char buf[PROMPT_BUFFER_SIZE];
 589
 590    char *cp = buf;
 591    char const *ccp;
 592
 593    if ((ccp = ok_vlook(prompt)) == NULL || *ccp == '\0')
 594       goto jleave;
 595
 596    for (; PTRCMP(cp, <, buf + sizeof(buf) - 1); ++cp) {
 597       char const *a;
 598       size_t l;
 599       int c = expand_shell_escape(&ccp, TRU1);
 600
 601       if (c > 0) {
 602          *cp = (char)c;
 603          continue;
 604       }
 605       if (c == 0 || c == PROMPT_STOP)
 606          break;
 607
 608       a = (c == PROMPT_DOLLAR) ? account_name : displayname;
 609       if (a == NULL)
 610          a = "";
 611       l = strlen(a);
 612       if (PTRCMP(cp + l, >=, buf + sizeof(buf) - 1))
 613          *cp++ = '?';
 614       else {
 615          memcpy(cp, a, l);
 616          cp += --l;
 617       }
 618    }
 619 jleave:
 620    *cp = '\0';
 621    return buf;
 622 }
 623
 624 FL char *
 625 nodename(int mayoverride)
 626 {
 627         static char *hostname;
 628         struct utsname ut;
 629         char *hn;
 630 #ifdef HAVE_SOCKETS
 631 # ifdef HAVE_IPV6
 632         struct addrinfo hints, *res;
 633 # else
 634         struct hostent *hent;
 635 # endif
 636 #endif
 637
 638         if (mayoverride && (hn = ok_vlook(hostname)) != NULL && *hn != '\0') {
 639                 if (hostname != NULL)
 640                         free(hostname);
 641                 hostname = sstrdup(hn);
 642         } else if (hostname == NULL) {
 643                 uname(&ut);
 644                 hn = ut.nodename;
 645 #ifdef HAVE_SOCKETS
 646 # ifdef HAVE_IPV6
 647                 memset(&hints, 0, sizeof hints);
 648                 hints.ai_family = AF_UNSPEC;
 649                 hints.ai_socktype = SOCK_DGRAM; /* dummy */
 650                 hints.ai_flags = AI_CANONNAME;
 651                 if (getaddrinfo(hn, "0", &hints, &res) == 0) {
 652                         if (res->ai_canonname != NULL) {
 653                                 size_t l = strlen(res->ai_canonname);
 654                                 hn = ac_alloc(l + 1);
 655                                 memcpy(hn, res->ai_canonname, l + 1);
 656                         }
 657                         freeaddrinfo(res);
 658                 }
 659 # else
 660                 hent = gethostbyname(hn);
 661                 if (hent != NULL) {
 662                         hn = hent->h_name;
 663                 }
 664 # endif
 665 #endif
 666                 hostname = sstrdup(hn);
 667 #if defined HAVE_SOCKETS && defined HAVE_IPV6
 668                 if (hn != ut.nodename)
 669                         ac_free(hn);
 670 #endif
 671         }
 672         return (hostname);
 673 }
 674
 675 FL char *
 676 lookup_password_for_token(char const *token)
 677 {
 678         size_t tl;
 679         char *var, *cp;
 680
 681         tl = strlen(token);
 682         var = ac_alloc(tl + 10);
 683
 684         memcpy(var, "password-", 9);
 685         memcpy(var + 9, token, tl);
 686         var[tl + 9] = '\0';
 687
 688         if ((cp = vok_vlook(var)) != NULL)
 689                 cp = savestr(cp);
 690         ac_free(var);
 691         return cp;
 692 }
 693
 694 FL char *
 695 getrandstring(size_t length)
 696 {
 697         static unsigned char nodedigest[16];
 698         static pid_t pid;
 699         struct str b64;
 700         int fd = -1;
 701         char *data, *cp;
 702         size_t i;
 703 #ifdef HAVE_MD5
 704         md5_ctx ctx;
 705 #else
 706         size_t j;
 707 #endif
 708
 709         data = ac_alloc(length);
 710         if ((fd = open("/dev/urandom", O_RDONLY)) < 0 ||
 711                         length != (size_t)read(fd, data, length)) {
 712                 if (pid == 0) {
 713                         pid = getpid();
 714                         srand(pid);
 715                         cp = nodename(0);
 716 #ifdef HAVE_MD5
 717                         md5_init(&ctx);
 718                         md5_update(&ctx, (unsigned char*)cp, strlen(cp));
 719                         md5_final(nodedigest, &ctx);
 720 #else
 721                         /* In that case it's only used for boundaries and
 722                          * Message-Id:s so that srand(3) should suffice */
 723                         j = strlen(cp) + 1;
 724                         for (i = 0; i < sizeof(nodedigest); ++i)
 725                                 nodedigest[i] = (unsigned char)(
 726                                         cp[i % j] ^ rand());
 727 #endif
 728                 }
 729                 for (i = 0; i < length; i++)
 730                         data[i] = (char)(
 731                                 (int)(255 * (rand() / (RAND_MAX + 1.0))) ^
 732                                 nodedigest[i % sizeof nodedigest]);
 733         }
 734         if (fd >= 0)
 735                 close(fd);
 736
 737         (void)b64_encode_buf(&b64, data, length, B64_SALLOC);
 738         ac_free(data);
 739         assert(length < b64.l);
 740         b64.s[length] = '\0';
 741         return b64.s;
 742 }
 743
 744 #ifdef HAVE_MD5
 745 FL char *
 746 md5tohex(char hex[MD5TOHEX_SIZE], void const *vp)
 747 {
 748         char const *cp = vp;
 749         size_t i, j;
 750
 751         for (i = 0; i < MD5TOHEX_SIZE / 2; i++) {
 752                 j = i << 1;
 753                 hex[j] = hexchar((cp[i] & 0xf0) >> 4);
 754                 hex[++j] = hexchar(cp[i] & 0x0f);
 755         }
 756         return hex;
 757 }
 758
 759 FL char *
 760 cram_md5_string(char const *user, char const *pass, char const *b64)
 761 {
 762         struct str in, out;
 763         char digest[16], *cp;
 764         size_t lu;
 765
 766         out.s = NULL;
 767         in.s = UNCONST(b64);
 768         in.l = strlen(in.s);
 769         (void)b64_decode(&out, &in, NULL);
 770         assert(out.s != NULL);
 771
 772         hmac_md5((unsigned char*)out.s, out.l, UNCONST(pass), strlen(pass),
 773                 digest);
 774         free(out.s);
 775         cp = md5tohex(salloc(MD5TOHEX_SIZE + 1), digest);
 776
 777         lu = strlen(user);
 778         in.l = lu + MD5TOHEX_SIZE +1;
 779         in.s = ac_alloc(lu + 1 + MD5TOHEX_SIZE +1);
 780         memcpy(in.s, user, lu);
 781         in.s[lu] = ' ';
 782         memcpy(in.s + lu + 1, cp, MD5TOHEX_SIZE);
 783         (void)b64_encode(&out, &in, B64_SALLOC|B64_CRLF);
 784         ac_free(in.s);
 785         return out.s;
 786 }
 787 #endif /* HAVE_MD5 */
 788
 789 FL enum okay
 790 makedir(const char *name)
 791 {
 792         int     e;
 793         struct stat     st;
 794
 795         if (mkdir(name, 0700) < 0) {
 796                 e = errno;
 797                 if ((e == EEXIST || e == ENOSYS) &&
 798                                 stat(name, &st) == 0 &&
 799                                 (st.st_mode&S_IFMT) == S_IFDIR)
 800                         return OKAY;
 801                 return STOP;
 802         }
 803         return OKAY;
 804 }
 805
 806 #ifdef  HAVE_FCHDIR
 807 FL enum okay
 808 cwget(struct cw *cw)
 809 {
 810         if ((cw->cw_fd = open(".", O_RDONLY)) < 0)
 811                 return STOP;
 812         if (fchdir(cw->cw_fd) < 0) {
 813                 close(cw->cw_fd);
 814                 return STOP;
 815         }
 816         return OKAY;
 817 }
 818
 819 FL enum okay
 820 cwret(struct cw *cw)
 821 {
 822         if (fchdir(cw->cw_fd) < 0)
 823                 return STOP;
 824         return OKAY;
 825 }
 826
 827 FL void
 828 cwrelse(struct cw *cw)
 829 {
 830         close(cw->cw_fd);
 831 }
 832 #else   /* !HAVE_FCHDIR */
 833 FL enum okay
 834 cwget(struct cw *cw)
 835 {
 836         if (getcwd(cw->cw_wd, sizeof cw->cw_wd) == NULL || chdir(cw->cw_wd) < 0)
 837                 return STOP;
 838         return OKAY;
 839 }
 840
 841 FL enum okay
 842 cwret(struct cw *cw)
 843 {
 844         if (chdir(cw->cw_wd) < 0)
 845                 return STOP;
 846         return OKAY;
 847 }
 848
 849 /*ARGSUSED*/
 850 FL void
 851 cwrelse(struct cw *cw)
 852 {
 853         (void)cw;
 854 }
 855 #endif  /* !HAVE_FCHDIR */
 856
 857 FL void
 858 makeprint(struct str const *in, struct str *out)
 859 {
 860         static int print_all_chars = -1;
 861         char const *inp, *maxp;
 862         char *outp;
 863         size_t msz;
 864
 865         if (print_all_chars == -1)
 866                 print_all_chars = ok_blook(print_all_chars);
 867
 868         msz = in->l + 1;
 869         out->s = outp = smalloc(msz);
 870         inp = in->s;
 871         maxp = inp + in->l;
 872
 873         if (print_all_chars) {
 874                 out->l = in->l;
 875                 memcpy(outp, inp, out->l);
 876                 goto jleave;
 877         }
 878
 879 #ifdef HAVE_C90AMEND1
 880         if (mb_cur_max > 1) {
 881                 char mbb[MB_LEN_MAX + 1];
 882                 wchar_t wc;
 883                 int i, n;
 884            size_t dist;
 885
 886                 out->l = 0;
 887                 while (inp < maxp) {
 888                         if (*inp & 0200)
 889                                 n = mbtowc(&wc, inp, maxp - inp);
 890                         else {
 891                                 wc = *inp;
 892                                 n = 1;
 893                         }
 894                         if (n < 0) {
 895                                 /* FIXME Why mbtowc() resetting here?
 896                                  * FIXME what about ISO 2022-JP plus -- those
 897                                  * FIXME will loose shifts, then!
 898                                  * FIXME THUS - we'd need special "known points"
 899                                  * FIXME to do so - say, after a newline!!
 900                                  * FIXME WE NEED TO CHANGE ALL USES +MBLEN! */
 901                                 (void)mbtowc(&wc, NULL, mb_cur_max);
 902                                 wc = utf8 ? 0xFFFD : '?';
 903                                 n = 1;
 904                         } else if (n == 0)
 905                                 n = 1;
 906                         inp += n;
 907                         if (!iswprint(wc) && wc != '\n' && wc != '\r' &&
 908                                         wc != '\b' && wc != '\t') {
 909                                 if ((wc & ~(wchar_t)037) == 0)
 910                                         wc = utf8 ? 0x2400 | wc : '?';
 911                                 else if (wc == 0177)
 912                                         wc = utf8 ? 0x2421 : '?';
 913                                 else
 914                                         wc = utf8 ? 0x2426 : '?';
 915                         }
 916                         if ((n = wctomb(mbb, wc)) <= 0)
 917                                 continue;
 918                         out->l += n;
 919                         if (out->l >= msz - 1) {
 920                                 dist = outp - out->s;
 921                                 out->s = srealloc(out->s, msz += 32);
 922                                 outp = &out->s[dist];
 923                         }
 924                         for (i = 0; i < n; i++)
 925                                 *outp++ = mbb[i];
 926                 }
 927         } else
 928 #endif /* C90AMEND1 */
 929         {
 930                 int c;
 931                 while (inp < maxp) {
 932                         c = *inp++ & 0377;
 933                         if (!isprint(c) && c != '\n' && c != '\r' &&
 934                                         c != '\b' && c != '\t')
 935                                 c = '?';
 936                         *outp++ = c;
 937                 }
 938                 out->l = in->l;
 939         }
 940 jleave:
 941         out->s[out->l] = '\0';
 942 }
 943
 944 FL char *
 945 prstr(const char *s)
 946 {
 947         struct str      in, out;
 948         char    *rp;
 949
 950         in.s = UNCONST(s);
 951         in.l = strlen(s);
 952         makeprint(&in, &out);
 953         rp = salloc(out.l + 1);
 954         memcpy(rp, out.s, out.l);
 955         rp[out.l] = '\0';
 956         free(out.s);
 957         return rp;
 958 }
 959
 960 FL int
 961 prout(const char *s, size_t sz, FILE *fp)
 962 {
 963         struct str      in, out;
 964         int     n;
 965
 966         in.s = UNCONST(s);
 967         in.l = sz;
 968         makeprint(&in, &out);
 969         n = fwrite(out.s, 1, out.l, fp);
 970         free(out.s);
 971         return n;
 972 }
 973
 974 FL size_t
 975 putuc(int u, int c, FILE *fp)
 976 {
 977         size_t rv;
 978    UNUSED(u);
 979
 980 #ifdef HAVE_C90AMEND1
 981         if (utf8 && (u & ~(wchar_t)0177)) {
 982                 char mbb[MB_LEN_MAX];
 983                 int i, n;
 984                 if ((n = wctomb(mbb, u)) > 0) {
 985                         rv = wcwidth(u);
 986                         for (i = 0; i < n; ++i)
 987                                 if (putc(mbb[i] & 0377, fp) == EOF) {
 988                                         rv = 0;
 989                                         break;
 990                                 }
 991                 } else if (n == 0)
 992                         rv = (putc('\0', fp) != EOF);
 993                 else
 994                         rv = 0;
 995         } else
 996 #endif
 997                 rv = (putc(c, fp) != EOF);
 998         return rv;
 999 }
1000
1001 #ifdef HAVE_COLOUR
1002 FL void
1003 colour_table_create(char const *pager_used)
1004 {
1005    union {char *cp; char const *ccp; void *vp; struct colour_table *ctp;} u;
1006    size_t i;
1007    struct colour_table *ct;
1008
1009    if (ok_blook(colour_disable))
1010       goto jleave;
1011
1012    /* If pager, check wether it is allowed to use colour */
1013    if (pager_used != NULL) {
1014       char *pager;
1015
1016       if ((u.cp = ok_vlook(colour_pagers)) == NULL)
1017          u.ccp = COLOUR_PAGERS;
1018       pager = savestr(u.cp);
1019
1020       while ((u.cp = strcomma(&pager, TRU1)) != NULL)
1021          if (strstr(pager_used, u.cp) != NULL)
1022             goto jok;
1023       goto jleave;
1024    }
1025
1026    /* $TERM is different in that we default to false unless whitelisted */
1027    {
1028       char *term, *okterms;
1029
1030       /* Don't use getenv(), but force copy-in into our own tables.. */
1031       if ((term = _var_voklook("TERM")) == NULL)
1032          goto jleave;
1033       if ((okterms = ok_vlook(colour_terms)) == NULL)
1034          okterms = UNCONST(COLOUR_TERMS);
1035       okterms = savestr(okterms);
1036
1037       i = strlen(term);
1038       while ((u.cp = strcomma(&okterms, TRU1)) != NULL)
1039          if (!strncmp(u.cp, term, i))
1040             goto jok;
1041       goto jleave;
1042    }
1043
1044 jok:
1045    colour_table = ct = salloc(sizeof *ct); /* XXX lex.c yet resets (FILTER!) */
1046    {  static struct {
1047          enum okeys        okey;
1048          enum colourspec   cspec;
1049          char const        *defval;
1050       } const map[] = {
1051          {ok_v_colour_msginfo,  COLOURSPEC_MSGINFO,  COLOUR_MSGINFO},
1052          {ok_v_colour_partinfo, COLOURSPEC_PARTINFO, COLOUR_PARTINFO},
1053          {ok_v_colour_from_,    COLOURSPEC_FROM_,    COLOUR_FROM_},
1054          {ok_v_colour_header,   COLOURSPEC_HEADER,   COLOUR_HEADER},
1055          {ok_v_colour_uheader,  COLOURSPEC_UHEADER,  COLOUR_UHEADER}
1056       };
1057
1058       for (i = 0; i < NELEM(map); ++i) {
1059          if ((u.cp = _var_oklook(map[i].okey)) == NULL)
1060             u.ccp = map[i].defval;
1061          u.cp = _colour_iso6429(u.ccp);
1062          ct->ct_csinfo[map[i].cspec].l = strlen(u.cp);
1063          ct->ct_csinfo[map[i].cspec].s = u.cp;
1064       }
1065    }
1066    ct->ct_csinfo[COLOURSPEC_RESET].l = sizeof("\033[0m") - 1;
1067    ct->ct_csinfo[COLOURSPEC_RESET].s = UNCONST("\033[0m");
1068
1069    if ((u.cp = ok_vlook(colour_user_headers)) == NULL)
1070       u.ccp = COLOUR_USER_HEADERS;
1071    ct->ct_csinfo[COLOURSPEC_RESET + 1].l = i = strlen(u.ccp);
1072    ct->ct_csinfo[COLOURSPEC_RESET + 1].s = (i == 0) ? NULL : savestr(u.ccp);
1073 jleave:
1074    ;
1075 }
1076
1077 FL void
1078 colour_put(FILE *fp, enum colourspec cs)
1079 {
1080    if (colour_table != NULL) {
1081       struct str const *cp = colour_get(cs);
1082
1083       fwrite(cp->s, cp->l, 1, fp);
1084    }
1085 }
1086
1087 FL void
1088 colour_put_header(FILE *fp, char const *name)
1089 {
1090    enum colourspec cs = COLOURSPEC_HEADER;
1091    struct str const *uheads;
1092    char *cp, *cp_base, *x;
1093    size_t namelen;
1094
1095    if (colour_table == NULL)
1096       goto j_leave;
1097    /* Normal header colours if there are no user headers */
1098    uheads = colour_table->ct_csinfo + COLOURSPEC_RESET + 1;
1099    if (uheads->s == NULL)
1100       goto jleave;
1101
1102    /* Iterate over all entries in the *colour-user-headers* list */
1103    cp = ac_alloc(uheads->l + 1);
1104    memcpy(cp, uheads->s, uheads->l + 1);
1105    cp_base = cp;
1106    namelen = strlen(name);
1107    while ((x = strcomma(&cp, TRU1)) != NULL) {
1108       size_t l = (cp != NULL) ? PTR2SIZE(cp - x) - 1 : strlen(x);
1109       if (l == namelen && !ascncasecmp(x, name, namelen)) {
1110          cs = COLOURSPEC_UHEADER;
1111          break;
1112       }
1113    }
1114    ac_free(cp_base);
1115 jleave:
1116    colour_put(fp, cs);
1117 j_leave:
1118    ;
1119 }
1120
1121 FL void
1122 colour_reset(FILE *fp)
1123 {
1124    if (colour_table != NULL)
1125       fwrite("\033[0m", 4, 1, fp);
1126 }
1127
1128 FL struct str const *
1129 colour_get(enum colourspec cs)
1130 {
1131    struct str const *rv = NULL;
1132
1133    if (colour_table != NULL)
1134       if ((rv = colour_table->ct_csinfo + cs)->s == NULL)
1135          rv = NULL;
1136    return rv;
1137 }
1138 #endif /* HAVE_COLOUR */
1139
1140 FL void
1141 time_current_update(struct time_current *tc, bool_t full_update)
1142 {
1143         tc->tc_time = time(NULL);
1144         if (full_update) {
1145                 memcpy(&tc->tc_gm, gmtime(&tc->tc_time), sizeof tc->tc_gm);
1146                 memcpy(&tc->tc_local, localtime(&tc->tc_time),
1147                         sizeof tc->tc_local);
1148                 sstpcpy(tc->tc_ctime, ctime(&tc->tc_time));
1149         }
1150 }
1151
1152 static void
1153 _out_of_memory(void)
1154 {
1155    panic("no memory");
1156 }
1157
1158 #ifndef HAVE_DEBUG
1159 FL void *
1160 smalloc(size_t s SMALLOC_DEBUG_ARGS)
1161 {
1162    void *rv;
1163
1164    if (s == 0)
1165       s = 1;
1166    if ((rv = malloc(s)) == NULL)
1167       _out_of_memory();
1168    return rv;
1169 }
1170
1171 FL void *
1172 srealloc(void *v, size_t s SMALLOC_DEBUG_ARGS)
1173 {
1174    void *rv;
1175
1176    if (s == 0)
1177       s = 1;
1178    if (v == NULL)
1179       rv = smalloc(s);
1180    else if ((rv = realloc(v, s)) == NULL)
1181       _out_of_memory();
1182    return rv;
1183 }
1184
1185 FL void *
1186 scalloc(size_t nmemb, size_t size SMALLOC_DEBUG_ARGS)
1187 {
1188    void *rv;
1189
1190    if (size == 0)
1191       size = 1;
1192    if ((rv = calloc(nmemb, size)) == NULL)
1193       _out_of_memory();
1194    return rv;
1195 }
1196
1197 #else /* !HAVE_DEBUG */
1198 CTA(sizeof(char) == sizeof(ui8_t));
1199
1200 # define _HOPE_SIZE        (2 * 8 * sizeof(char))
1201 # define _HOPE_SET(C)   \
1202 do {\
1203    union ptr __xl, __xu;\
1204    struct chunk *__xc;\
1205    __xl.p = (C).p;\
1206    __xc = __xl.c - 1;\
1207    __xu.p = __xc;\
1208    (C).cp += 8;\
1209    __xl.ui8p[0]=0xDE; __xl.ui8p[1]=0xAA; __xl.ui8p[2]=0x55; __xl.ui8p[3]=0xAD;\
1210    __xl.ui8p[4]=0xBE; __xl.ui8p[5]=0x55; __xl.ui8p[6]=0xAA; __xl.ui8p[7]=0xEF;\
1211    __xu.ui8p += __xc->size - 8;\
1212    __xu.ui8p[0]=0xDE; __xu.ui8p[1]=0xAA; __xu.ui8p[2]=0x55; __xu.ui8p[3]=0xAD;\
1213    __xu.ui8p[4]=0xBE; __xu.ui8p[5]=0x55; __xu.ui8p[6]=0xAA; __xu.ui8p[7]=0xEF;\
1214 } while (0)
1215 # define _HOPE_GET_TRACE(C,BAD) do {(C).cp += 8; _HOPE_GET(C, BAD);} while(0)
1216 # define _HOPE_GET(C,BAD) \
1217 do {\
1218    union ptr __xl, __xu;\
1219    struct chunk *__xc;\
1220    ui32_t __i;\
1221    __xl.p = (C).p;\
1222    __xl.cp -= 8;\
1223    (C).cp = __xl.cp;\
1224    __xc = __xl.c - 1;\
1225    (BAD) = FAL0;\
1226    __i = 0;\
1227    if (__xl.ui8p[0] != 0xDE) __i |= 1<<0;\
1228    if (__xl.ui8p[1] != 0xAA) __i |= 1<<1;\
1229    if (__xl.ui8p[2] != 0x55) __i |= 1<<2;\
1230    if (__xl.ui8p[3] != 0xAD) __i |= 1<<3;\
1231    if (__xl.ui8p[4] != 0xBE) __i |= 1<<4;\
1232    if (__xl.ui8p[5] != 0x55) __i |= 1<<5;\
1233    if (__xl.ui8p[6] != 0xAA) __i |= 1<<6;\
1234    if (__xl.ui8p[7] != 0xEF) __i |= 1<<7;\
1235    if (__i != 0) {\
1236       (BAD) = TRU1;\
1237       warn("%p: corrupted lower canary: 0x%02X: %s, line %u",\
1238          __xl.p, __i, mdbg_file, mdbg_line);\
1239    }\
1240    __xu.p = __xc;\
1241    __xu.ui8p += __xc->size - 8;\
1242    __i = 0;\
1243    if (__xu.ui8p[0] != 0xDE) __i |= 1<<0;\
1244    if (__xu.ui8p[1] != 0xAA) __i |= 1<<1;\
1245    if (__xu.ui8p[2] != 0x55) __i |= 1<<2;\
1246    if (__xu.ui8p[3] != 0xAD) __i |= 1<<3;\
1247    if (__xu.ui8p[4] != 0xBE) __i |= 1<<4;\
1248    if (__xu.ui8p[5] != 0x55) __i |= 1<<5;\
1249    if (__xu.ui8p[6] != 0xAA) __i |= 1<<6;\
1250    if (__xu.ui8p[7] != 0xEF) __i |= 1<<7;\
1251    if (__i != 0) {\
1252       (BAD) = TRU1;\
1253       warn("%p: corrupted upper canary: 0x%02X: %s, line %u",\
1254          __xl.p, __i, mdbg_file, mdbg_line);\
1255    }\
1256    if (BAD)\
1257       warn("   ..canary last seen: %s, line %u", __xc->file, __xc->line);\
1258 } while (0)
1259
1260 struct chunk {
1261    struct chunk   *prev;
1262    struct chunk   *next;
1263    char const     *file;
1264    ui16_t         line;
1265    ui8_t          isfree;
1266    ui8_t          __dummy;
1267    ui32_t         size;
1268 };
1269
1270 union ptr {
1271    void           *p;
1272    struct chunk   *c;
1273    char           *cp;
1274    ui8_t          *ui8p;
1275 };
1276
1277 struct chunk   *_mlist, *_mfree;
1278
1279 FL void *
1280 (smalloc)(size_t s SMALLOC_DEBUG_ARGS)
1281 {
1282    union ptr p;
1283
1284    if (s == 0)
1285       s = 1;
1286    s += sizeof(struct chunk) + _HOPE_SIZE;
1287
1288    if ((p.p = (malloc)(s)) == NULL)
1289       _out_of_memory();
1290    p.c->prev = NULL;
1291    if ((p.c->next = _mlist) != NULL)
1292       _mlist->prev = p.c;
1293    p.c->file = mdbg_file;
1294    p.c->line = (ui16_t)mdbg_line;
1295    p.c->isfree = FAL0;
1296    p.c->size = (ui32_t)s;
1297    _mlist = p.c++;
1298    _HOPE_SET(p);
1299    return p.p;
1300 }
1301
1302 FL void *
1303 (srealloc)(void *v, size_t s SMALLOC_DEBUG_ARGS)
1304 {
1305    union ptr p;
1306    bool_t isbad;
1307
1308    if ((p.p = v) == NULL) {
1309       p.p = (smalloc)(s, mdbg_file, mdbg_line);
1310       goto jleave;
1311    }
1312
1313    _HOPE_GET(p, isbad);
1314    --p.c;
1315    if (p.c->isfree) {
1316       fprintf(stderr, "srealloc(): region freed!  At %s, line %d\n"
1317          "\tLast seen: %s, line %d\n",
1318          mdbg_file, mdbg_line, p.c->file, p.c->line);
1319       goto jforce;
1320    }
1321
1322    if (p.c == _mlist)
1323       _mlist = p.c->next;
1324    else
1325       p.c->prev->next = p.c->next;
1326    if (p.c->next != NULL)
1327       p.c->next->prev = p.c->prev;
1328
1329 jforce:
1330    if (s == 0)
1331       s = 1;
1332    s += sizeof(struct chunk) + _HOPE_SIZE;
1333
1334    if ((p.p = (realloc)(p.c, s)) == NULL)
1335       _out_of_memory();
1336    p.c->prev = NULL;
1337    if ((p.c->next = _mlist) != NULL)
1338       _mlist->prev = p.c;
1339    p.c->file = mdbg_file;
1340    p.c->line = (ui16_t)mdbg_line;
1341    p.c->isfree = FAL0;
1342    p.c->size = (ui32_t)s;
1343    _mlist = p.c++;
1344    _HOPE_SET(p);
1345 jleave:
1346    return p.p;
1347 }
1348
1349 FL void *
1350 (scalloc)(size_t nmemb, size_t size SMALLOC_DEBUG_ARGS)
1351 {
1352    union ptr p;
1353
1354    if (size == 0)
1355       size = 1;
1356    if (nmemb == 0)
1357       nmemb = 1;
1358    size *= nmemb;
1359    size += sizeof(struct chunk) + _HOPE_SIZE;
1360
1361    if ((p.p = (malloc)(size)) == NULL)
1362       _out_of_memory();
1363    memset(p.p, 0, size);
1364    p.c->prev = NULL;
1365    if ((p.c->next = _mlist) != NULL)
1366       _mlist->prev = p.c;
1367    p.c->file = mdbg_file;
1368    p.c->line = (ui16_t)mdbg_line;
1369    p.c->isfree = FAL0;
1370    p.c->size = (ui32_t)size;
1371    _mlist = p.c++;
1372    _HOPE_SET(p);
1373    return p.p;
1374 }
1375
1376 FL void
1377 (sfree)(void *v SMALLOC_DEBUG_ARGS)
1378 {
1379    union ptr p;
1380    bool_t isbad;
1381
1382    if ((p.p = v) == NULL) {
1383       fprintf(stderr, "sfree(NULL) from %s, line %d\n", mdbg_file, mdbg_line);
1384       goto jleave;
1385    }
1386
1387    _HOPE_GET(p, isbad);
1388    --p.c;
1389    if (p.c->isfree) {
1390       fprintf(stderr, "sfree(): double-free avoided at %s, line %d\n"
1391          "\tLast seen: %s, line %d\n",
1392          mdbg_file, mdbg_line, p.c->file, p.c->line);
1393       goto jleave;
1394    }
1395
1396    if (p.c == _mlist)
1397       _mlist = p.c->next;
1398    else
1399       p.c->prev->next = p.c->next;
1400    if (p.c->next != NULL)
1401       p.c->next->prev = p.c->prev;
1402    p.c->isfree = TRU1;
1403
1404    if (options & OPT_DEBUG) {
1405       p.c->next = _mfree;
1406       _mfree = p.c;
1407    } else
1408       (free)(p.c);
1409 jleave:
1410    ;
1411 }
1412
1413 FL void
1414 smemreset(void)
1415 {
1416    union ptr p;
1417    size_t c = 0, s = 0;
1418
1419    for (p.c = _mfree; p.c != NULL;) {
1420       void *vp = p.c;
1421       ++c;
1422       s += p.c->size;
1423       p.c = p.c->next;
1424       (free)(vp);
1425    }
1426    _mfree = NULL;
1427
1428    if (options & OPT_DEBUG)
1429       fprintf(stderr, "smemreset(): freed %" ZFMT " chunks/%" ZFMT " bytes\n",
1430          c, s);
1431 }
1432
1433 FL int
1434 smemtrace(void *v)
1435 {
1436    /* For _HOPE_GET() */
1437    char const * const mdbg_file = "smemtrace()";
1438    int const mdbg_line = -1;
1439
1440    FILE *fp;
1441    char *cp;
1442    union ptr p, xp;
1443    bool_t isbad;
1444    size_t lines;
1445
1446    v = (void*)0x1;
1447    if ((fp = Ftemp(&cp, "Ra", "w+", 0600, 1)) == NULL) {
1448       perror("tmpfile");
1449       goto jleave;
1450    }
1451    rm(cp);
1452    Ftfree(&cp);
1453
1454    fprintf(fp, "Currently allocated memory chunks:\n");
1455    for (lines = 0, p.c = _mlist; p.c != NULL; ++lines, p.c = p.c->next) {
1456       xp = p;
1457       ++xp.c;
1458       _HOPE_GET_TRACE(xp, isbad);
1459       fprintf(fp, "%s%p (%5" ZFMT " bytes): %s, line %u\n",
1460          (isbad ? "! CANARY ERROR: " : ""), xp.p,
1461          (size_t)(p.c->size - sizeof(struct chunk)), p.c->file, p.c->line);
1462    }
1463
1464    if (options & OPT_DEBUG) {
1465       fprintf(fp, "sfree()d memory chunks awaiting free():\n");
1466       for (p.c = _mfree; p.c != NULL; ++lines, p.c = p.c->next) {
1467          xp = p;
1468          ++xp.c;
1469          _HOPE_GET_TRACE(xp, isbad);
1470          fprintf(fp, "%s%p (%5" ZFMT " bytes): %s, line %u\n",
1471             (isbad ? "! CANARY ERROR: " : ""), xp.p,
1472             (size_t)(p.c->size - sizeof(struct chunk)), p.c->file, p.c->line);
1473       }
1474    }
1475
1476    page_or_print(fp, lines);
1477    Fclose(fp);
1478    v = NULL;
1479 jleave:
1480    return (v != NULL);
1481 }
1482
1483 # ifdef MEMCHECK
1484 FL bool_t
1485 _smemcheck(char const *mdbg_file, int mdbg_line)
1486 {
1487    union ptr p, xp;
1488    bool_t anybad = FAL0, isbad;
1489    size_t lines;
1490
1491    for (lines = 0, p.c = _mlist; p.c != NULL; ++lines, p.c = p.c->next) {
1492       xp = p;
1493       ++xp.c;
1494       _HOPE_GET_TRACE(xp, isbad);
1495       if (isbad) {
1496          anybad = TRU1;
1497          fprintf(stderr,
1498             "! CANARY ERROR: %p (%5" ZFMT " bytes): %s, line %u\n",
1499             xp.p, (size_t)(p.c->size - sizeof(struct chunk)),
1500             p.c->file, p.c->line);
1501       }
1502    }
1503
1504    if (options & OPT_DEBUG) {
1505       for (p.c = _mfree; p.c != NULL; ++lines, p.c = p.c->next) {
1506          xp = p;
1507          ++xp.c;
1508          _HOPE_GET_TRACE(xp, isbad);
1509          if (isbad) {
1510             anybad = TRU1;
1511             fprintf(stderr,
1512                "! CANARY ERROR: %p (%5" ZFMT " bytes): %s, line %u\n",
1513                xp.p, (size_t)(p.c->size - sizeof(struct chunk)),
1514                p.c->file, p.c->line);
1515          }
1516       }
1517    }
1518    return anybad;
1519 }
1520 # endif /* MEMCHECK */
1521 #endif /* HAVE_DEBUG */
1522
1523 /* vim:set fenc=utf-8:s-it-mode (TODO only partial true) */