folder.c

   1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
   2  *@ Folder (mailbox) initialization, newmail announcement and related.
   3  *
   4  * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
   5  * Copyright (c) 2012 - 2016 Steffen (Daode) Nurpmeso <steffen@sdaoden.eu>.
   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. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35 #undef n_FILE
  36 #define n_FILE folder
  37
  38 #ifndef HAVE_AMALGAMATION
  39 # include "nail.h"
  40 #endif
  41
  42 #include <pwd.h>
  43
  44 /* Update mailname (if name != NULL) and displayname, return whether displayname
  45  * was large enough to swallow mailname */
  46 static bool_t  _update_mailname(char const *name);
  47 #ifdef HAVE_C90AMEND1 /* TODO unite __narrow_suffix() into one fun! */
  48 SINLINE size_t __narrow_suffix(char const *cp, size_t cpl, size_t maxl);
  49 #endif
  50
  51 #ifdef HAVE_C90AMEND1
  52 SINLINE size_t
  53 __narrow_suffix(char const *cp, size_t cpl, size_t maxl)
  54 {
  55    int err;
  56    size_t i, ok;
  57    NYD_ENTER;
  58
  59    for (err = ok = i = 0; cpl > maxl || err;) {
  60       int ml = mblen(cp, cpl);
  61       if (ml < 0) { /* XXX _narrow_suffix(): mblen() error; action? */
  62          (void)mblen(NULL, 0);
  63          err = 1;
  64          ml = 1;
  65       } else {
  66          if (!err)
  67             ok = i;
  68          err = 0;
  69          if (ml == 0)
  70             break;
  71       }
  72       cp += ml;
  73       i += ml;
  74       cpl -= ml;
  75    }
  76    NYD_LEAVE;
  77    return ok;
  78 }
  79 #endif /* HAVE_C90AMEND1 */
  80
  81 static bool_t
  82 _update_mailname(char const *name)
  83 {
  84    char *mailp, *dispp;
  85    size_t i, j;
  86    bool_t rv = TRU1;
  87    NYD_ENTER;
  88
  89    /* Don't realpath(3) if it's only an update request */
  90    if (name != NULL) {
  91 #ifdef HAVE_REALPATH
  92       enum protocol p = which_protocol(name);
  93
  94       if (p == PROTO_FILE || p == PROTO_MAILDIR) {
  95          if (realpath(name, mailname) == NULL && errno != ENOENT) {
  96             n_err(_("Can't canonicalize %s\n"), n_shexp_quote_cp(name, FAL0));
  97             rv = FAL0;
  98             goto jdocopy;
  99          }
 100       } else
 101 jdocopy:
 102 #endif
 103          n_strscpy(mailname, name, sizeof(mailname));
 104    }
 105
 106    mailp = mailname;
 107    dispp = displayname;
 108
 109    /* Don't display an absolute path but "+FOLDER" if under *folder* */
 110    /* C99 */{
 111       char const *folderp;
 112
 113       if(*(folderp = folder_query()) != '\0'){
 114          i = strlen(folderp);
 115          if(!strncmp(folderp, mailp, i)){
 116             if(folderp[i -1] != '/' && mailp[i] == '/') /* XXX DIRSEP magic */
 117                ++i;
 118             mailp += i;
 119             *dispp++ = '+';
 120          }
 121       }
 122    }
 123
 124    /* We want to see the name of the folder .. on the screen */
 125    i = strlen(mailp);
 126    if (i < sizeof(displayname) -1)
 127       memcpy(dispp, mailp, i +1);
 128    else {
 129       rv = FAL0;
 130       /* Avoid disrupting multibyte sequences (if possible) */
 131 #ifndef HAVE_C90AMEND1
 132       j = sizeof(displayname) / 3 - 1;
 133       i -= sizeof(displayname) - (1/* + */ + 3) - j;
 134 #else
 135       j = field_detect_clip(sizeof(displayname) / 3, mailp, i);
 136       i = j + __narrow_suffix(mailp + j, i - j,
 137          sizeof(displayname) - (1/* + */ + 3 + 1) - j);
 138 #endif
 139       snprintf(dispp, sizeof(displayname), "%.*s...%s",
 140          (int)j, mailp, mailp + i);
 141    }
 142    NYD_LEAVE;
 143    return rv;
 144 }
 145
 146 FL int
 147 setfile(char const *name, enum fedit_mode fm) /* TODO oh my god */
 148 {
 149    /* Note we don't 'userid(myname) != getuid()', preliminary steps are usually
 150     * necessary to make a mailbox accessible by a different user, and if that
 151     * has happened, let's just let the usual file perms decide */
 152    static int shudclob;
 153
 154    struct stat stb;
 155    size_t offset;
 156    char const *who;
 157    int rv, omsgCount = 0;
 158    FILE *ibuf = NULL, *lckfp = NULL;
 159    bool_t isdevnull = FAL0;
 160    NYD_ENTER;
 161
 162    pstate &= ~PS_SETFILE_OPENED;
 163
 164    /* C99 */{
 165       enum fexp_mode fexpm;
 166
 167       if((who = shortcut_expand(name)) != NULL){
 168          fexpm = FEXP_NSHORTCUT | FEXP_NSHELL;
 169          name = who;
 170       }else
 171          fexpm = FEXP_NSHELL;
 172
 173       if(name[0] == '%'){
 174          fm |= FEDIT_SYSBOX; /* TODO fexpand() needs to tell is-valid-user! */
 175          if(*(who = &name[1]) == ':')
 176             ++who;
 177          if(*who == '\0')
 178             who = myname;
 179       }else
 180          who = myname;
 181
 182       if ((name = fexpand(name, fexpm)) == NULL)
 183          goto jem1;
 184    }
 185
 186    /* For at least substdate() users */
 187    time_current_update(&time_current, FAL0);
 188
 189    switch (which_protocol(name)) {
 190    case PROTO_FILE:
 191       if (temporary_protocol_ext != NULL)
 192          name = savecat(name, temporary_protocol_ext);
 193       isdevnull = ((options & OPT_BATCH_FLAG) && !strcmp(name, "/dev/null"));
 194 #ifdef HAVE_REALPATH
 195       do { /* TODO we need objects, goes away then */
 196 # ifdef HAVE_REALPATH_NULL
 197          char *cp;
 198
 199          if ((cp = realpath(name, NULL)) != NULL) {
 200             name = savestr(cp);
 201             (free)(cp);
 202          }
 203 # else
 204          char cbuf[PATH_MAX];
 205
 206          if (realpath(name, cbuf) != NULL)
 207             name = savestr(cbuf);
 208 # endif
 209       } while (0);
 210 #endif
 211       rv = 1;
 212       break;
 213    case PROTO_MAILDIR:
 214       shudclob = 1;
 215       rv = maildir_setfile(name, fm);
 216       goto jleave;
 217 #ifdef HAVE_POP3
 218    case PROTO_POP3:
 219       shudclob = 1;
 220       rv = pop3_setfile(name, fm);
 221       goto jleave;
 222 #endif
 223    default:
 224       n_err(_("Cannot handle protocol: %s\n"), name);
 225       goto jem1;
 226    }
 227
 228    if ((ibuf = Zopen(name, "r")) == NULL) {
 229       if ((fm & FEDIT_SYSBOX) && errno == ENOENT) {
 230          if (strcmp(who, myname) && getpwnam(who) == NULL) {
 231             n_err(_("%s is not a user of this system\n"),
 232                n_shexp_quote_cp(who, FAL0));
 233             goto jem2;
 234          }
 235          if (!(options & OPT_QUICKRUN_MASK) && ok_blook(bsdcompat))
 236             n_err(_("No mail for %s\n"), who);
 237       }
 238       if (fm & FEDIT_NEWMAIL)
 239          goto jleave;
 240
 241       mb.mb_type = MB_VOID;
 242       if (ok_blook(emptystart)) {
 243          if (!(options & OPT_QUICKRUN_MASK) && !ok_blook(bsdcompat))
 244             n_perr(name, 0);
 245          /* We must avoid returning -1 and causing program exit */
 246          rv = 1;
 247          goto jleave;
 248       }
 249       n_perr(name, 0);
 250       goto jem1;
 251    }
 252
 253    if (fstat(fileno(ibuf), &stb) == -1) {
 254       if (fm & FEDIT_NEWMAIL)
 255          goto jleave;
 256       n_perr(_("fstat"), 0);
 257       goto jem1;
 258    }
 259
 260    if (S_ISREG(stb.st_mode) || isdevnull) {
 261       /* EMPTY */
 262    } else {
 263       if (fm & FEDIT_NEWMAIL)
 264          goto jleave;
 265       errno = S_ISDIR(stb.st_mode) ? EISDIR : EINVAL;
 266       n_perr(name, 0);
 267       goto jem1;
 268    }
 269
 270    /* Looks like all will be well.  We must now relinquish our hold on the
 271     * current set of stuff.  Must hold signals while we are reading the new
 272     * file, else we will ruin the message[] data structure */
 273
 274    hold_sigs(); /* TODO note on this one in quit.c:quit() */
 275    if (shudclob && !(fm & FEDIT_NEWMAIL) && !quit()) {
 276       rele_sigs();
 277       goto jem2;
 278    }
 279
 280 #ifdef HAVE_SOCKETS
 281    if (!(fm & FEDIT_NEWMAIL) && mb.mb_sock.s_fd >= 0)
 282       sclose(&mb.mb_sock); /* TODO sorry? VMAILFS->close(), thank you */
 283 #endif
 284
 285    /* TODO There is no intermediate VOID box we've switched to: name may
 286     * TODO point to the same box that we just have written, so any updates
 287     * TODO we won't see!  Reopen again in this case.  RACY! Goes with VOID! */
 288    /* TODO In addition: in case of compressed/hook boxes we lock a temporary! */
 289    /* TODO We may uselessly open twice but quit() doesn't say whether we were
 290     * TODO modified so we can't tell: Mailbox::is_modified() :-(( */
 291    if (/*shudclob && !(fm & FEDIT_NEWMAIL) &&*/ !strcmp(name, mailname)) {
 292       name = mailname;
 293       Fclose(ibuf);
 294
 295       if ((ibuf = Zopen(name, "r")) == NULL ||
 296             fstat(fileno(ibuf), &stb) == -1 ||
 297             (!S_ISREG(stb.st_mode) && !isdevnull)) {
 298          n_perr(name, 0);
 299          rele_sigs();
 300          goto jem2;
 301       }
 302    }
 303
 304    /* Copy the messages into /tmp and set pointers */
 305    if (!(fm & FEDIT_NEWMAIL)) {
 306       if (isdevnull) {
 307          mb.mb_type = MB_VOID;
 308          mb.mb_perm = 0;
 309       } else {
 310          mb.mb_type = MB_FILE;
 311          mb.mb_perm = (((options & OPT_R_FLAG) || (fm & FEDIT_RDONLY) ||
 312                access(name, W_OK) < 0) ? 0 : MB_DELE | MB_EDIT);
 313          if (shudclob) {
 314             if (mb.mb_itf) {
 315                fclose(mb.mb_itf);
 316                mb.mb_itf = NULL;
 317             }
 318             if (mb.mb_otf) {
 319                fclose(mb.mb_otf);
 320                mb.mb_otf = NULL;
 321             }
 322          }
 323       }
 324       shudclob = 1;
 325       if (fm & FEDIT_SYSBOX)
 326          pstate &= ~PS_EDIT;
 327       else
 328          pstate |= PS_EDIT;
 329       initbox(name);
 330       offset = 0;
 331    } else {
 332       fseek(mb.mb_otf, 0L, SEEK_END);
 333       /* TODO Doing this without holding a lock is.. And not err checking.. */
 334       fseek(ibuf, mailsize, SEEK_SET);
 335       offset = mailsize;
 336       omsgCount = msgCount;
 337    }
 338
 339    if (isdevnull)
 340       lckfp = (FILE*)-1;
 341    else if (!(pstate & PS_EDIT))
 342       lckfp = n_dotlock(name, fileno(ibuf), FLT_READ, offset,0,
 343             (fm & FEDIT_NEWMAIL ? 0 : UIZ_MAX));
 344    else if (n_file_lock(fileno(ibuf), FLT_READ, offset,0,
 345          (fm & FEDIT_NEWMAIL ? 0 : UIZ_MAX)))
 346       lckfp = (FILE*)-1;
 347
 348    if (lckfp == NULL) {
 349       if (!(fm & FEDIT_NEWMAIL)) {
 350          char const *emsg = (pstate & PS_EDIT)
 351                ? N_("Unable to lock mailbox, aborting operation")
 352                : N_("Unable to (dot) lock mailbox, aborting operation");
 353          n_perr(V_(emsg), 0);
 354       }
 355       rele_sigs();
 356       if (!(fm & FEDIT_NEWMAIL))
 357          goto jem1;
 358       goto jleave;
 359    }
 360
 361    mailsize = fsize(ibuf);
 362
 363    /* TODO This is too simple minded?  We should regenerate an index file
 364     * TODO to be able to truly tell whether *anything* has changed! */
 365    if ((fm & FEDIT_NEWMAIL) && UICMP(z, mailsize, <=, offset)) {
 366       rele_sigs();
 367       goto jleave;
 368    }
 369    setptr(ibuf, offset);
 370    setmsize(msgCount);
 371    if ((fm & FEDIT_NEWMAIL) && mb.mb_sorted) {
 372       mb.mb_threaded = 0;
 373       c_sort((void*)-1);
 374    }
 375
 376    Fclose(ibuf);
 377    ibuf = NULL;
 378    if (lckfp != NULL && lckfp != (FILE*)-1) {
 379       Pclose(lckfp, FAL0);
 380       /*lckfp = NULL;*/
 381    }
 382    rele_sigs();
 383
 384    if (!(fm & FEDIT_NEWMAIL)) {
 385       pstate &= ~PS_SAW_COMMAND;
 386       pstate |= PS_SETFILE_OPENED;
 387    }
 388
 389    if ((options & OPT_EXISTONLY) && !(options & OPT_HEADERLIST)) {
 390       rv = (msgCount == 0);
 391       goto jleave;
 392    }
 393
 394    if ((!(pstate & PS_EDIT) || (fm & FEDIT_NEWMAIL)) && msgCount == 0) {
 395       if (!(fm & FEDIT_NEWMAIL)) {
 396          if (!ok_blook(emptystart))
 397             n_err(_("No mail for %s\n"), who);
 398       }
 399       goto jleave;
 400    }
 401
 402    if (fm & FEDIT_NEWMAIL)
 403       newmailinfo(omsgCount);
 404
 405    rv = 0;
 406 jleave:
 407    if (ibuf != NULL) {
 408       Fclose(ibuf);
 409       if (lckfp != NULL && lckfp != (FILE*)-1)
 410          Pclose(lckfp, FAL0);
 411    }
 412    NYD_LEAVE;
 413    return rv;
 414 jem2:
 415    mb.mb_type = MB_VOID;
 416 jem1:
 417    rv = -1;
 418    goto jleave;
 419 }
 420
 421 FL int
 422 newmailinfo(int omsgCount)
 423 {
 424    int mdot, i;
 425    NYD_ENTER;
 426
 427    for (i = 0; i < omsgCount; ++i)
 428       message[i].m_flag &= ~MNEWEST;
 429
 430    if (msgCount > omsgCount) {
 431       for (i = omsgCount; i < msgCount; ++i)
 432          message[i].m_flag |= MNEWEST;
 433       printf(_("New mail has arrived.\n"));
 434       if ((i = msgCount - omsgCount) == 1)
 435          printf(_("Loaded 1 new message.\n"));
 436       else
 437          printf(_("Loaded %d new messages.\n"), i);
 438    } else
 439       printf(_("Loaded %d messages.\n"), msgCount);
 440
 441    check_folder_hook(TRU1);
 442
 443    mdot = getmdot(1);
 444
 445    if (ok_blook(header))
 446       print_headers(omsgCount + 1, msgCount, FAL0);
 447    NYD_LEAVE;
 448    return mdot;
 449 }
 450
 451 FL void
 452 setmsize(int sz)
 453 {
 454    NYD_ENTER;
 455    if (n_msgvec != NULL)
 456       free(n_msgvec);
 457    n_msgvec = scalloc(sz + 1, sizeof *n_msgvec);
 458    NYD_LEAVE;
 459 }
 460
 461 FL void
 462 print_header_summary(char const *Larg)
 463 {
 464    size_t bot, top, i, j;
 465    NYD_ENTER;
 466
 467    if (Larg != NULL) {
 468       /* Avoid any messages XXX add a make_mua_silent() and use it? */
 469       if ((options & (OPT_VERB | OPT_EXISTONLY)) == OPT_EXISTONLY) {
 470          freopen("/dev/null", "w", stdout);
 471          freopen("/dev/null", "w", stderr);
 472       }
 473       assert(n_msgvec != NULL);
 474       i = (getmsglist(/*TODO make arg const */UNCONST(Larg), n_msgvec, 0) <= 0);
 475       if (options & OPT_EXISTONLY) {
 476          exit_status = (int)i;
 477          goto jleave;
 478       }
 479       if (i)
 480          goto jleave;
 481       for (bot = msgCount, top = 0, i = 0; (j = n_msgvec[i]) != 0; ++i) {
 482          if (bot > j)
 483             bot = j;
 484          if (top < j)
 485             top = j;
 486       }
 487    } else
 488       bot = 1, top = msgCount;
 489    print_headers(bot, top, (Larg != NULL)); /* TODO should take iterator!! */
 490 jleave:
 491    NYD_LEAVE;
 492 }
 493
 494 FL void
 495 announce(int printheaders)
 496 {
 497    int vec[2], mdot;
 498    NYD_ENTER;
 499
 500    mdot = newfileinfo();
 501    vec[0] = mdot;
 502    vec[1] = 0;
 503    dot = message + mdot - 1;
 504    if (printheaders && msgCount > 0 && ok_blook(header)) {
 505       print_header_group(vec); /* XXX errors? */
 506    }
 507    NYD_LEAVE;
 508 }
 509
 510 FL int
 511 newfileinfo(void)
 512 {
 513    struct message *mp;
 514    int u, n, mdot, d, s, hidden, moved;
 515    NYD_ENTER;
 516
 517    if (mb.mb_type == MB_VOID) {
 518       mdot = 1;
 519       goto jleave;
 520    }
 521
 522    mdot = getmdot(0);
 523    s = d = hidden = moved =0;
 524    for (mp = message, n = 0, u = 0; PTRCMP(mp, <, message + msgCount); ++mp) {
 525       if (mp->m_flag & MNEW)
 526          ++n;
 527       if ((mp->m_flag & MREAD) == 0)
 528          ++u;
 529       if ((mp->m_flag & (MDELETED | MSAVED)) == (MDELETED | MSAVED))
 530          ++moved;
 531       if ((mp->m_flag & (MDELETED | MSAVED)) == MDELETED)
 532          ++d;
 533       if ((mp->m_flag & (MDELETED | MSAVED)) == MSAVED)
 534          ++s;
 535       if (mp->m_flag & MHIDDEN)
 536          ++hidden;
 537    }
 538
 539    /* If displayname gets truncated the user effectively has no option to see
 540     * the full pathname of the mailbox, so print it at least for '? fi' */
 541    printf(_("%s: "), n_shexp_quote_cp(
 542       (_update_mailname(NULL) ? displayname : mailname), FAL0));
 543    if (msgCount == 1)
 544       printf(_("1 message"));
 545    else
 546       printf(_("%d messages"), msgCount);
 547    if (n > 0)
 548       printf(_(" %d new"), n);
 549    if (u-n > 0)
 550       printf(_(" %d unread"), u);
 551    if (d > 0)
 552       printf(_(" %d deleted"), d);
 553    if (s > 0)
 554       printf(_(" %d saved"), s);
 555    if (moved > 0)
 556       printf(_(" %d moved"), moved);
 557    if (hidden > 0)
 558       printf(_(" %d hidden"), hidden);
 559    else if (mb.mb_perm == 0)
 560       printf(_(" [Read only]"));
 561    printf("\n");
 562 jleave:
 563    NYD_LEAVE;
 564    return mdot;
 565 }
 566
 567 FL int
 568 getmdot(int nmail)
 569 {
 570    struct message *mp;
 571    char *cp;
 572    int mdot;
 573    enum mflag avoid = MHIDDEN | MDELETED;
 574    NYD_ENTER;
 575
 576    if (!nmail) {
 577       if (ok_blook(autothread)) {
 578          OBSOLETE(_("please use *autosort=thread* instead of *autothread*"));
 579          c_thread(NULL);
 580       } else if ((cp = ok_vlook(autosort)) != NULL) {
 581          if (mb.mb_sorted != NULL)
 582             free(mb.mb_sorted);
 583          mb.mb_sorted = sstrdup(cp);
 584          c_sort(NULL);
 585       }
 586    }
 587    if (mb.mb_type == MB_VOID) {
 588       mdot = 1;
 589       goto jleave;
 590    }
 591
 592    if (nmail)
 593       for (mp = message; PTRCMP(mp, <, message + msgCount); ++mp)
 594          if ((mp->m_flag & (MNEWEST | avoid)) == MNEWEST)
 595             break;
 596
 597    if (!nmail || PTRCMP(mp, >=, message + msgCount)) {
 598       if (mb.mb_threaded) {
 599          for (mp = threadroot; mp != NULL; mp = next_in_thread(mp))
 600             if ((mp->m_flag & (MNEW | avoid)) == MNEW)
 601                break;
 602       } else {
 603          for (mp = message; PTRCMP(mp, <, message + msgCount); ++mp)
 604             if ((mp->m_flag & (MNEW | avoid)) == MNEW)
 605                break;
 606       }
 607    }
 608
 609    if ((mb.mb_threaded ? (mp == NULL) : PTRCMP(mp, >=, message + msgCount))) {
 610       if (mb.mb_threaded) {
 611          for (mp = threadroot; mp != NULL; mp = next_in_thread(mp))
 612             if (mp->m_flag & MFLAGGED)
 613                break;
 614       } else {
 615          for (mp = message; PTRCMP(mp, <, message + msgCount); ++mp)
 616             if (mp->m_flag & MFLAGGED)
 617                break;
 618       }
 619    }
 620
 621    if ((mb.mb_threaded ? (mp == NULL) : PTRCMP(mp, >=, message + msgCount))) {
 622       if (mb.mb_threaded) {
 623          for (mp = threadroot; mp != NULL; mp = next_in_thread(mp))
 624             if (!(mp->m_flag & (MREAD | avoid)))
 625                break;
 626       } else {
 627          for (mp = message; PTRCMP(mp, <, message + msgCount); ++mp)
 628             if (!(mp->m_flag & (MREAD | avoid)))
 629                break;
 630       }
 631    }
 632
 633    if (nmail &&
 634          (mb.mb_threaded ? (mp != NULL) : PTRCMP(mp, <, message + msgCount)))
 635       mdot = (int)PTR2SIZE(mp - message + 1);
 636    else if (ok_blook(showlast)) {
 637       if (mb.mb_threaded) {
 638          for (mp = this_in_thread(threadroot, -1); mp;
 639                mp = prev_in_thread(mp))
 640             if (!(mp->m_flag & avoid))
 641                break;
 642          mdot = (mp != NULL) ? (int)PTR2SIZE(mp - message + 1) : msgCount;
 643       } else {
 644          for (mp = message + msgCount - 1; mp >= message; --mp)
 645             if (!(mp->m_flag & avoid))
 646                break;
 647          mdot = (mp >= message) ? (int)PTR2SIZE(mp - message + 1) : msgCount;
 648       }
 649    } else if (!nmail &&
 650          (mb.mb_threaded ? (mp != NULL) : PTRCMP(mp, <, message + msgCount)))
 651       mdot = (int)PTR2SIZE(mp - message + 1);
 652    else if (mb.mb_threaded) {
 653       for (mp = threadroot; mp; mp = next_in_thread(mp))
 654          if (!(mp->m_flag & avoid))
 655             break;
 656       mdot = (mp != NULL) ? (int)PTR2SIZE(mp - message + 1) : 1;
 657    } else {
 658       for (mp = message; PTRCMP(mp, <, message + msgCount); ++mp)
 659          if (!(mp->m_flag & avoid))
 660             break;
 661       mdot = PTRCMP(mp, <, message + msgCount)
 662             ? (int)PTR2SIZE(mp - message + 1) : 1;
 663    }
 664 jleave:
 665    NYD_LEAVE;
 666    return mdot;
 667 }
 668
 669 FL void
 670 initbox(char const *name)
 671 {
 672    char *tempMesg;
 673    NYD_ENTER;
 674
 675    if (mb.mb_type != MB_VOID)
 676       n_strscpy(prevfile, mailname, PATH_MAX);
 677
 678    /* TODO name always NE mailname (but goes away for objects anyway)
 679     * TODO Well, not true no more except that in parens */
 680    _update_mailname((name != mailname) ? name : NULL);
 681
 682    if ((mb.mb_otf = Ftmp(&tempMesg, "tmpmbox", OF_WRONLY | OF_HOLDSIGS)) ==
 683          NULL) {
 684       n_perr(_("temporary mail message file"), 0);
 685       exit(EXIT_ERR);
 686    }
 687    if ((mb.mb_itf = safe_fopen(tempMesg, "r", NULL)) == NULL) {
 688       n_perr(_("temporary mail message file"), 0);
 689       exit(EXIT_ERR);
 690    }
 691    Ftmp_release(&tempMesg);
 692
 693    message_reset();
 694    mb.mb_threaded = 0;
 695    if (mb.mb_sorted != NULL) {
 696       free(mb.mb_sorted);
 697       mb.mb_sorted = NULL;
 698    }
 699    dot = prevdot = threadroot = NULL;
 700    pstate &= ~PS_DID_PRINT_DOT;
 701    NYD_LEAVE;
 702 }
 703
 704 FL char const *
 705 folder_query(void){
 706    struct n_string s, *sp = &s;
 707    char *cp;
 708    char const *rv;
 709    bool_t err;
 710    NYD_ENTER;
 711
 712    /* *folder* is linked with *_folder_resolved*: we only use the latter */
 713    for(err = FAL0;;){
 714       if((rv = ok_vlook(_folder_resolved)) != NULL)
 715          break;
 716
 717       /* POSIX says:
 718        *    If directory does not start with a <slash> ('/'), the contents
 719        *    of HOME shall be prefixed to it.
 720        * And:
 721        *    If folder is unset or set to null, [.] filenames beginning with
 722        *    '+' shall refer to files in the current directory.
 723        * We may have the result already */
 724       rv = "";
 725       err = FAL0;
 726
 727       if((cp = ok_vlook(folder)) == NULL)
 728          goto jset;
 729
 730       /* Expand the *folder*; skip %: prefix for simplicity of use */
 731       if(cp[0] == '%' && cp[1] == ':')
 732          cp += 2;
 733       if((err = (cp = fexpand(cp, FEXP_NSHELL)) == NULL) || *cp == '\0')
 734          goto jset;
 735
 736       switch(which_protocol(cp)){
 737       case PROTO_POP3:
 738          n_err(_("*folder* can't be set to a flat, readonly POP3 account\n"));
 739          err = TRU1;
 740          goto jset;
 741       default:
 742          /* Further expansion desired */
 743          break;
 744       }
 745
 746       /* Prefix HOME as necessary */
 747       if(*cp != '/'){
 748          char const *home = ok_vlook(HOME);
 749          size_t l1 = strlen(home), l2 = strlen(cp);
 750
 751          sp = n_string_creat_auto(sp);
 752          sp = n_string_reserve(sp, l1 + 1 + l2 +1);
 753          sp = n_string_push_buf(sp, home, l1);
 754          sp = n_string_push_c(sp, '/');
 755          sp = n_string_push_buf(sp, cp, l2);
 756          cp = n_string_cp(sp);
 757       }
 758
 759       rv = cp;
 760
 761       /* TODO Since our visual mailname is resolved via realpath(3) if available
 762        * TODO to avoid that we loose track of our currently open folder in case
 763        * TODO we chdir away, but still checks the leading path portion against
 764        * TODO fold_query() to be able to abbreviate to the +FOLDER syntax if
 765        * TODO possible, we need to realpath(3) the folder, too */
 766 #ifdef HAVE_REALPATH
 767       /* C99 */{
 768 # ifndef HAVE_REALPATH_NULL
 769          if(cp == sp->s_dat)
 770             sp = n_string_drop_ownership(sp);
 771          sp = n_string_reserve(sp, PATH_MAX +1);
 772 # else
 773          sp->s_dat = NULL;
 774 # endif
 775
 776          if((sp->s_dat = realpath(cp, sp->s_dat)) != NULL){
 777 # ifdef HAVE_REALPATH_NULL
 778             sp->s_dat = savestr(cp = sp->s_dat);
 779             (free)(cp);
 780 # endif
 781             rv = sp->s_dat;
 782          }else if(errno == ENOENT)
 783             rv = cp;
 784          else{
 785             n_err(_("Can't canonicalize *folder*: %s\n"),
 786                n_shexp_quote_cp(cp, FAL0));
 787             err = TRU1;
 788             rv = "";
 789          }
 790       }
 791 #endif /* HAVE_REALPATH */
 792
 793 jset:
 794       /* C99 */{
 795          bool_t reset = !(pstate & PS_ROOT);
 796
 797          pstate |= PS_ROOT;
 798          ok_vset(_folder_resolved, rv);
 799          if(reset)
 800             pstate &= ~PS_ROOT;
 801       }
 802    }
 803
 804    if(err){
 805       n_err(_("*folder* is not resolvable, using CWD\n"));
 806       assert(rv != NULL && *rv == '\0');
 807    }
 808    NYD_LEAVE;
 809    return rv;
 810 }
 811
 812 /* s-it-mode */