maildir.c

   1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
   2  *@ Maildir folder support. FIXME rewrite - why do we chdir(2)??
   3  *@ FIXME indeed - my S-Postman Python (!) is faster dealing with maildir!!
   4  *
   5  * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
   6  * Copyright (c) 2012 - 2015 Steffen (Daode) Nurpmeso <sdaoden@users.sf.net>.
   7  */
   8 /*
   9  * Copyright (c) 2004
  10  * Gunnar Ritter.  All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. All advertising materials mentioning features or use of this software
  21  *    must display the following acknowledgement:
  22  *    This product includes software developed by Gunnar Ritter
  23  *    and his contributors.
  24  * 4. Neither the name of Gunnar Ritter nor the names of his contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY GUNNAR RITTER AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL GUNNAR RITTER OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  */
  40 #undef n_FILE
  41 #define n_FILE maildir
  42
  43 #ifndef HAVE_AMALGAMATION
  44 # include "nail.h"
  45 #endif
  46
  47 #include <dirent.h>
  48
  49 struct mditem {
  50    struct message *md_data;
  51    unsigned       md_hash;
  52 };
  53
  54 static struct mditem *_maildir_table;
  55 static ui32_t        _maildir_prime;
  56 static sigjmp_buf    _maildir_jmp;
  57
  58 static void             __maildircatch(int s);
  59 static void             __maildircatch_hold(int s);
  60
  61 /* Do some cleanup in the tmp/ subdir */
  62 static void             _cleantmp(void);
  63
  64 static int              _maildir_setfile1(char const *name, enum fedit_mode fm,
  65                            int omsgCount);
  66
  67 /* In combination with the names from mkname(), this comparison function
  68  * ensures that the order of messages in a maildir folder created by mailx
  69  * remains always the same. In effect, if a mbox folder is transferred to
  70  * a maildir folder by 'copy *', the message order wont' change */
  71 static int              mdcmp(void const *a, void const *b);
  72
  73 static int              _maildir_subdir(char const *name, char const *sub,
  74                            enum fedit_mode fm);
  75
  76 static void             _maildir_append(char const *name, char const *sub,
  77                            char const *fn);
  78
  79 static void             readin(char const *name, struct message *m);
  80
  81 static void             maildir_update(void);
  82
  83 static void             _maildir_move(struct message *m);
  84
  85 static char *           mkname(time_t t, enum mflag f, char const *pref);
  86
  87 static enum okay        maildir_append1(char const *name, FILE *fp, off_t off1,
  88                            long size, enum mflag flag);
  89
  90 static enum okay        trycreate(char const *name);
  91
  92 static enum okay        mkmaildir(char const *name);
  93
  94 static struct message * mdlook(char const *name, struct message *data);
  95
  96 static void             mktable(void);
  97
  98 static enum okay        subdir_remove(char const *name, char const *sub);
  99
 100 static void
 101 __maildircatch(int s)
 102 {
 103    NYD_X; /* Signal handler */
 104    siglongjmp(_maildir_jmp, s);
 105 }
 106
 107 static void
 108 __maildircatch_hold(int s)
 109 {
 110    NYD_X; /* Signal handler */
 111    UNUSED(s);
 112    /* TODO no STDIO in signal handler, no _() tr's -- pre-translate interrupt
 113     * TODO globally; */
 114    n_err_sighdl(_("\nImportant operation in progress: "
 115       "interrupt again to forcefully abort\n"));
 116    safe_signal(SIGINT, &__maildircatch);
 117 }
 118
 119 static void
 120 _cleantmp(void)
 121 {
 122    char dep[PATH_MAX];
 123    struct stat st;
 124    time_t now;
 125    DIR *dirp;
 126    struct dirent *dp;
 127    NYD_ENTER;
 128
 129    if ((dirp = opendir("tmp")) == NULL)
 130       goto jleave;
 131
 132    now = n_time_epoch();
 133    while ((dp = readdir(dirp)) != NULL) {
 134       if (dp->d_name[0] == '.')
 135          continue;
 136       sstpcpy(sstpcpy(dep, "tmp/"), dp->d_name);
 137       if (stat(dep, &st) == -1)
 138          continue;
 139       if (st.st_atime + 36*3600 < now)
 140          unlink(dep);
 141    }
 142    closedir(dirp);
 143 jleave:
 144    NYD_LEAVE;
 145 }
 146
 147 static int
 148 _maildir_setfile1(char const *name, enum fedit_mode fm, int omsgCount)
 149 {
 150    int i;
 151    NYD_ENTER;
 152
 153    if (!(fm & FEDIT_NEWMAIL))
 154       _cleantmp();
 155
 156    mb.mb_perm = ((options & OPT_R_FLAG) || (fm & FEDIT_RDONLY)) ? 0 : MB_DELE;
 157    if ((i = _maildir_subdir(name, "cur", fm)) != 0)
 158       goto jleave;
 159    if ((i = _maildir_subdir(name, "new", fm)) != 0)
 160       goto jleave;
 161    _maildir_append(name, NULL, NULL);
 162
 163    srelax_hold();
 164    for (i = ((fm & FEDIT_NEWMAIL) ? omsgCount : 0); i < msgCount; ++i) {
 165       readin(name, message + i);
 166       srelax();
 167    }
 168    srelax_rele();
 169
 170    if (fm & FEDIT_NEWMAIL) {
 171       if (msgCount > omsgCount)
 172          qsort(&message[omsgCount], msgCount - omsgCount, sizeof *message,
 173             &mdcmp);
 174    } else if (msgCount)
 175       qsort(message, msgCount, sizeof *message, &mdcmp);
 176    i = msgCount;
 177 jleave:
 178    NYD_LEAVE;
 179    return i;
 180 }
 181
 182 static int
 183 mdcmp(void const *a, void const *b)
 184 {
 185    struct message const *mpa = a, *mpb = b;
 186    long i;
 187    NYD_ENTER;
 188
 189    if ((i = mpa->m_time - mpb->m_time) == 0)
 190       i = strcmp(mpa->m_maildir_file + 4, mpb->m_maildir_file + 4);
 191    NYD_LEAVE;
 192    return i;
 193 }
 194
 195 static int
 196 _maildir_subdir(char const *name, char const *sub, enum fedit_mode fm)
 197 {
 198    DIR *dirp;
 199    struct dirent *dp;
 200    int rv;
 201    NYD_ENTER;
 202
 203    if ((dirp = opendir(sub)) == NULL) {
 204       n_err(_("Cannot open directory \"%s/%s\"\n"), name, sub);
 205       rv = -1;
 206       goto jleave;
 207    }
 208    if (access(sub, W_OK) == -1)
 209       mb.mb_perm = 0;
 210    while ((dp = readdir(dirp)) != NULL) {
 211       if (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' ||
 212             (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
 213          continue;
 214       if (dp->d_name[0] == '.')
 215          continue;
 216       if (!(fm & FEDIT_NEWMAIL) || mdlook(dp->d_name, NULL) == NULL)
 217          _maildir_append(name, sub, dp->d_name);
 218    }
 219    closedir(dirp);
 220    rv = 0;
 221 jleave:
 222    NYD_LEAVE;
 223    return rv;
 224 }
 225
 226 static void
 227 _maildir_append(char const *name, char const *sub, char const *fn)
 228 {
 229    struct message *m;
 230    size_t sz, i;
 231    time_t t = 0;
 232    enum mflag f = MUSED | MNOFROM | MNEWEST;
 233    char const *cp;
 234    char *xp;
 235    NYD_ENTER;
 236    UNUSED(name);
 237
 238    if (fn != NULL && sub != NULL) {
 239       if (!strcmp(sub, "new"))
 240          f |= MNEW;
 241       t = strtol(fn, &xp, 10);
 242       if ((cp = strrchr(xp, ',')) != NULL && PTRCMP(cp, >, xp + 2) &&
 243             cp[-1] == '2' && cp[-2] == ':') {
 244          while (*++cp != '\0') {
 245             switch (*cp) {
 246             case 'F':
 247                f |= MFLAGGED;
 248                break;
 249             case 'R':
 250                f |= MANSWERED;
 251                break;
 252             case 'S':
 253                f |= MREAD;
 254                break;
 255             case 'T':
 256                f |= MDELETED;
 257                break;
 258             case 'D':
 259                f |= MDRAFT;
 260                break;
 261             }
 262          }
 263       }
 264    }
 265
 266    /* Ensure room (and a NULLified last entry) */
 267    ++msgCount;
 268    message_append(NULL);
 269    --msgCount;
 270
 271    if (fn == NULL || sub == NULL)
 272       goto jleave;
 273
 274    m = message + msgCount++;
 275    i = strlen(fn);
 276    m->m_maildir_file = smalloc((sz = strlen(sub)) + i + 1 +1);
 277    memcpy(m->m_maildir_file, sub, sz);
 278    m->m_maildir_file[sz] = '/';
 279    memcpy(m->m_maildir_file + sz + 1, fn, i +1);
 280    m->m_time = t;
 281    m->m_flag = f;
 282    m->m_maildir_hash = ~pjw(fn);
 283 jleave:
 284    NYD_LEAVE;
 285    return;
 286 }
 287
 288 static void
 289 readin(char const *name, struct message *m)
 290 {
 291    char *buf;
 292    size_t bufsize, buflen, cnt;
 293    long size = 0, lines = 0;
 294    off_t offset;
 295    FILE *fp;
 296    int emptyline = 0;
 297    NYD_ENTER;
 298
 299    if ((fp = Fopen(m->m_maildir_file, "r")) == NULL) {
 300       n_err(_("Cannot read \"%s/%s\" for message %lu\n"),
 301          name, m->m_maildir_file, (ul_i)PTR2SIZE(m - message + 1));
 302       m->m_flag |= MHIDDEN;
 303       goto jleave;
 304    }
 305
 306    cnt = fsize(fp);
 307    fseek(mb.mb_otf, 0L, SEEK_END);
 308    offset = ftell(mb.mb_otf);
 309    buf = smalloc(bufsize = LINESIZE);
 310    buflen = 0;
 311    while (fgetline(&buf, &bufsize, &cnt, &buflen, fp, 1) != NULL) {
 312       /* Since we simply copy over data without doing any transfer
 313        * encoding reclassification/adjustment we *have* to perform
 314        * RFC 4155 compliant From_ quoting here */
 315       if (emptyline && is_head(buf, buflen, FAL0)) {
 316          putc('>', mb.mb_otf);
 317          ++size;
 318       }
 319       size += fwrite(buf, 1, buflen, mb.mb_otf);/*XXX err hdling*/
 320       emptyline = (*buf == '\n');
 321       ++lines;
 322    }
 323    free(buf);
 324    if (!emptyline) {
 325       putc('\n', mb.mb_otf);
 326       ++lines;
 327       ++size;
 328    }
 329
 330    Fclose(fp);
 331    fflush(mb.mb_otf);
 332    m->m_size = m->m_xsize = size;
 333    m->m_lines = m->m_xlines = lines;
 334    m->m_block = mailx_blockof(offset);
 335    m->m_offset = mailx_offsetof(offset);
 336    substdate(m);
 337 jleave:
 338    NYD_LEAVE;
 339 }
 340
 341 static void
 342 maildir_update(void)
 343 {
 344    struct message *m;
 345    int dodel, c, gotcha = 0, held = 0, modflags = 0;
 346    NYD_ENTER;
 347
 348    if (mb.mb_perm == 0)
 349       goto jfree;
 350
 351    if (!(pstate & PS_EDIT)) {
 352       holdbits();
 353       for (m = message, c = 0; PTRCMP(m, <, message + msgCount); ++m) {
 354          if (m->m_flag & MBOX)
 355             c++;
 356       }
 357       if (c > 0)
 358          if (makembox() == STOP)
 359             goto jbypass;
 360    }
 361    for (m = message, gotcha = 0, held = 0; PTRCMP(m, <, message + msgCount);
 362          ++m) {
 363       if (pstate & PS_EDIT)
 364          dodel = m->m_flag & MDELETED;
 365       else
 366          dodel = !((m->m_flag & MPRESERVE) || !(m->m_flag & MTOUCH));
 367       if (dodel) {
 368          if (unlink(m->m_maildir_file) < 0)
 369             n_err(_("Cannot delete file \"%s/%s\" for message %lu\n"),
 370                mailname, m->m_maildir_file, (ul_i)PTR2SIZE(m - message + 1));
 371          else
 372             ++gotcha;
 373       } else {
 374          if ((m->m_flag & (MREAD | MSTATUS)) == (MREAD | MSTATUS) ||
 375                (m->m_flag & (MNEW | MBOXED | MSAVED | MSTATUS | MFLAG |
 376                MUNFLAG | MANSWER | MUNANSWER | MDRAFT | MUNDRAFT))) {
 377             _maildir_move(m);
 378             ++modflags;
 379          }
 380          ++held;
 381       }
 382    }
 383 jbypass:
 384    if ((gotcha || modflags) && (pstate & PS_EDIT)) {
 385       printf(_("\"%s\" "), displayname);
 386       printf((ok_blook(bsdcompat) || ok_blook(bsdmsgs))
 387          ? _("complete\n") : _("updated.\n"));
 388    } else if (held && !(pstate & PS_EDIT) && mb.mb_perm != 0) {
 389       if (held == 1)
 390          printf(_("Held 1 message in %s\n"), displayname);
 391       else
 392          printf(_("Held %d messages in %s\n"), held, displayname);
 393    }
 394    fflush(stdout);
 395 jfree:
 396    for (m = message; PTRCMP(m, <, message + msgCount); ++m)
 397       free(m->m_maildir_file);
 398    NYD_LEAVE;
 399 }
 400
 401 static void
 402 _maildir_move(struct message *m)
 403 {
 404    char *fn, *new;
 405    NYD_ENTER;
 406
 407    fn = mkname(0, m->m_flag, m->m_maildir_file + 4);
 408    new = savecat("cur/", fn);
 409    if (!strcmp(m->m_maildir_file, new))
 410       goto jleave;
 411    if (link(m->m_maildir_file, new) == -1) {
 412       n_err(_("Cannot link \"%s/%s\" to \"%s/%s\": "
 413          "message %lu not touched\n"),
 414          mailname, m->m_maildir_file, mailname, new,
 415          (ul_i)PTR2SIZE(m - message + 1));
 416       goto jleave;
 417    }
 418    if (unlink(m->m_maildir_file) == -1)
 419       n_err(_("Cannot unlink \"%s/%s\"\n"), mailname, m->m_maildir_file);
 420 jleave:
 421    NYD_LEAVE;
 422 }
 423
 424 static char *
 425 mkname(time_t t, enum mflag f, char const *pref)
 426 {
 427    static unsigned long cnt;
 428    static pid_t mypid; /* XXX This should possibly be global, somehow */
 429    static char *node;
 430
 431    char *cp;
 432    int size, n, i;
 433    NYD_ENTER;
 434
 435    if (pref == NULL) {
 436       if (mypid == 0)
 437          mypid = getpid();
 438       if (node == NULL) {
 439          cp = nodename(0);
 440          n = size = 0;
 441          do {
 442             if (UICMP(32, n, <, size + 8))
 443                node = srealloc(node, size += 20);
 444             switch (*cp) {
 445             case '/':
 446                node[n++] = '\\', node[n++] = '0',
 447                node[n++] = '5', node[n++] = '7';
 448                break;
 449             case ':':
 450                node[n++] = '\\', node[n++] = '0',
 451                node[n++] = '7', node[n++] = '2';
 452                break;
 453             default:
 454                node[n++] = *cp;
 455             }
 456          } while (*cp++ != '\0');
 457       }
 458       size = 60 + strlen(node);
 459       cp = salloc(size);
 460       n = snprintf(cp, size, "%lu.%06lu_%06lu.%s:2,",
 461             (ul_i)t, (ul_i)mypid, ++cnt, node);
 462    } else {
 463       size = (n = strlen(pref)) + 13;
 464       cp = salloc(size);
 465       memcpy(cp, pref, n +1);
 466       for (i = n; i > 3; --i)
 467          if (cp[i - 1] == ',' && cp[i - 2] == '2' && cp[i - 3] == ':') {
 468             n = i;
 469             break;
 470          }
 471       if (i <= 3) {
 472          memcpy(cp + n, ":2,", 3 +1);
 473          n += 3;
 474       }
 475    }
 476    if (n < size - 7) {
 477       if (f & MDRAFTED)
 478          cp[n++] = 'D';
 479       if (f & MFLAGGED)
 480          cp[n++] = 'F';
 481       if (f & MANSWERED)
 482          cp[n++] = 'R';
 483       if (f & MREAD)
 484          cp[n++] = 'S';
 485       if (f & MDELETED)
 486          cp[n++] = 'T';
 487       cp[n] = '\0';
 488    }
 489    NYD_LEAVE;
 490    return cp;
 491 }
 492
 493 static enum okay
 494 maildir_append1(char const *name, FILE *fp, off_t off1, long size,
 495    enum mflag flag)
 496 {
 497    char buf[4096], *fn, *tfn, *nfn;
 498    struct stat st;
 499    FILE *op;
 500    time_t now;
 501    size_t nlen, flen, n;
 502    enum okay rv = STOP;
 503    NYD_ENTER;
 504
 505    nlen = strlen(name);
 506
 507    /* Create a unique temporary file */
 508    for (nfn = (char*)0xA /* XXX no magic */;; sleep(1)) {
 509       now = n_time_epoch();
 510       flen = strlen(fn = mkname(now, flag, NULL));
 511       tfn = salloc(n = nlen + flen + 6);
 512       snprintf(tfn, n, "%s/tmp/%s", name, fn);
 513
 514       /* Use "wx" for O_EXCL XXX stat(2) rather redundant; coverity:TOCTOU */
 515       if ((!stat(tfn, &st) || errno == ENOENT) &&
 516             (op = Fopen(tfn, "wx")) != NULL)
 517          break;
 518
 519       nfn = (char*)(PTR2SIZE(nfn) - 1);
 520       if (nfn == NULL) {
 521          n_err(_("Can't create an unique file name in \"%s/tmp\"\n"), name);
 522          goto jleave;
 523       }
 524    }
 525
 526    if (fseek(fp, off1, SEEK_SET) == -1)
 527       goto jtmperr;
 528    while (size > 0) {
 529       size_t z = UICMP(z, size, >, sizeof buf) ? sizeof buf : (size_t)size;
 530
 531       if (z != (n = fread(buf, 1, z, fp)) || n != fwrite(buf, 1, n, op)) {
 532 jtmperr:
 533          n_err(_("Error writing to \"%s\"\n"), tfn);
 534          Fclose(op);
 535          goto jerr;
 536       }
 537       size -= n;
 538    }
 539    Fclose(op);
 540
 541    nfn = salloc(n = nlen + flen + 6);
 542    snprintf(nfn, n, "%s/new/%s", name, fn);
 543    if (link(tfn, nfn) == -1) {
 544       n_err(_("Cannot link \"%s\" to \"%s\"\n"), tfn, nfn);
 545       goto jerr;
 546    }
 547    rv = OKAY;
 548 jerr:
 549    if (unlink(tfn) == -1)
 550       n_err(_("Cannot unlink \"%s\"\n"), tfn);
 551 jleave:
 552    NYD_LEAVE;
 553    return rv;
 554 }
 555
 556 static enum okay
 557 trycreate(char const *name)
 558 {
 559    struct stat st;
 560    enum okay rv = STOP;
 561    NYD_ENTER;
 562
 563    if (!stat(name, &st)) {
 564       if (!S_ISDIR(st.st_mode)) {
 565          n_err(_("\"%s\" is not a directory\n"), name);
 566          goto jleave;
 567       }
 568    } else if (makedir(name) != OKAY) {
 569       n_err(_("Cannot create directory \"%s\"\n"), name);
 570       goto jleave;
 571    } else
 572       ++imap_created_mailbox;
 573    rv = OKAY;
 574 jleave:
 575    NYD_LEAVE;
 576    return rv;
 577 }
 578
 579 static enum okay
 580 mkmaildir(char const *name) /* TODO proper cleanup on error; use path[] loop */
 581 {
 582    char *np;
 583    size_t sz;
 584    enum okay rv = STOP;
 585    NYD_ENTER;
 586
 587    if (trycreate(name) == OKAY) {
 588       np = ac_alloc((sz = strlen(name)) + 4 +1);
 589       memcpy(np, name, sz);
 590       memcpy(np + sz, "/tmp", 4 +1);
 591       if (trycreate(np) == OKAY) {
 592          memcpy(np + sz, "/new", 4 +1);
 593          if (trycreate(np) == OKAY) {
 594             memcpy(np + sz, "/cur", 4 +1);
 595             rv = trycreate(np);
 596          }
 597       }
 598       ac_free(np);
 599    }
 600    NYD_LEAVE;
 601    return rv;
 602 }
 603
 604 static struct message *
 605 mdlook(char const *name, struct message *data)
 606 {
 607    struct mditem *md;
 608    ui32_t c, h, n = 0;
 609    NYD_ENTER;
 610
 611    if (data && data->m_maildir_hash)
 612       h = ~data->m_maildir_hash;
 613    else
 614       h = pjw(name);
 615    h %= _maildir_prime;
 616    c = h;
 617    md = _maildir_table + c;
 618
 619    while (md->md_data != NULL) {
 620       if (!strcmp(md->md_data->m_maildir_file + 4, name))
 621          break;
 622       c += (n & 1) ? -((n+1)/2) * ((n+1)/2) : ((n+1)/2) * ((n+1)/2);
 623       n++;
 624       while (c >= _maildir_prime)
 625          c -= _maildir_prime;
 626       md = _maildir_table + c;
 627    }
 628    if (data != NULL && md->md_data == NULL)
 629       md->md_data = data;
 630    NYD_LEAVE;
 631    return md->md_data;
 632 }
 633
 634 static void
 635 mktable(void)
 636 {
 637    struct message *mp;
 638    size_t i;
 639    NYD_ENTER;
 640
 641    _maildir_prime = nextprime(msgCount);
 642    _maildir_table = scalloc(_maildir_prime, sizeof *_maildir_table);
 643    for (mp = message, i = msgCount; i-- != 0; ++mp)
 644       mdlook(mp->m_maildir_file + 4, mp);
 645    NYD_LEAVE;
 646 }
 647
 648 static enum okay
 649 subdir_remove(char const *name, char const *sub)
 650 {
 651    char *path;
 652    int pathsize, pathend, namelen, sublen, n;
 653    DIR *dirp;
 654    struct dirent *dp;
 655    enum okay rv = STOP;
 656    NYD_ENTER;
 657
 658    namelen = strlen(name);
 659    sublen = strlen(sub);
 660    path = smalloc(pathsize = namelen + sublen + 30 +1);
 661    memcpy(path, name, namelen);
 662    path[namelen] = '/';
 663    memcpy(path + namelen + 1, sub, sublen);
 664    path[namelen + sublen + 1] = '/';
 665    path[pathend = namelen + sublen + 2] = '\0';
 666
 667    if ((dirp = opendir(path)) == NULL) {
 668       n_perr(path, 0);
 669       goto jleave;
 670    }
 671    while ((dp = readdir(dirp)) != NULL) {
 672       if (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' ||
 673             (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
 674          continue;
 675       if (dp->d_name[0] == '.')
 676          continue;
 677       n = strlen(dp->d_name);
 678       if (UICMP(32, pathend + n +1, >, pathsize))
 679          path = srealloc(path, pathsize = pathend + n + 30);
 680       memcpy(path + pathend, dp->d_name, n +1);
 681       if (unlink(path) == -1) {
 682          n_perr(path, 0);
 683          closedir(dirp);
 684          goto jleave;
 685       }
 686    }
 687    closedir(dirp);
 688
 689    path[pathend] = '\0';
 690    if (rmdir(path) == -1) {
 691       n_perr(path, 0);
 692       goto jleave;
 693    }
 694    rv = OKAY;
 695 jleave:
 696    free(path);
 697    NYD_LEAVE;
 698    return rv;
 699 }
 700
 701 FL int
 702 maildir_setfile(char const * volatile name, enum fedit_mode fm)
 703 {
 704    sighandler_type volatile saveint;
 705    struct cw cw;
 706    int i = -1, omsgCount;
 707    NYD_ENTER;
 708
 709    omsgCount = msgCount;
 710    if (cwget(&cw) == STOP) {
 711       n_alert(_("Cannot open current directory"));
 712       goto jleave;
 713    }
 714
 715    if (!(fm & FEDIT_NEWMAIL))
 716       quit();
 717
 718    saveint = safe_signal(SIGINT, SIG_IGN);
 719
 720    if (!(fm & FEDIT_NEWMAIL)) {
 721       if (fm & FEDIT_SYSBOX)
 722          pstate &= ~PS_EDIT;
 723       else
 724          pstate |= PS_EDIT;
 725       if (mb.mb_itf) {
 726          fclose(mb.mb_itf);
 727          mb.mb_itf = NULL;
 728       }
 729       if (mb.mb_otf) {
 730          fclose(mb.mb_otf);
 731          mb.mb_otf = NULL;
 732       }
 733       initbox(name);
 734       mb.mb_type = MB_MAILDIR;
 735    }
 736
 737    if (chdir(name) < 0) {
 738       n_err(_("Cannot change directory to \"%s\"\n"), name);
 739       mb.mb_type = MB_VOID;
 740       *mailname = '\0';
 741       msgCount = 0;
 742       cwrelse(&cw);
 743       safe_signal(SIGINT, saveint);
 744       goto jleave;
 745    }
 746
 747    _maildir_table = NULL;
 748    if (sigsetjmp(_maildir_jmp, 1) == 0) {
 749       if (fm & FEDIT_NEWMAIL)
 750          mktable();
 751       if (saveint != SIG_IGN)
 752          safe_signal(SIGINT, &__maildircatch);
 753       i = _maildir_setfile1(name, fm, omsgCount);
 754    }
 755    if ((fm & FEDIT_NEWMAIL) && _maildir_table != NULL)
 756       free(_maildir_table);
 757
 758    safe_signal(SIGINT, saveint);
 759
 760    if (i < 0) {
 761       mb.mb_type = MB_VOID;
 762       *mailname = '\0';
 763       msgCount = 0;
 764    }
 765
 766    if (cwret(&cw) == STOP)
 767       n_panic(_("Cannot change back to current directory"));
 768    cwrelse(&cw);
 769
 770    setmsize(msgCount);
 771    if ((fm & FEDIT_NEWMAIL) && mb.mb_sorted && msgCount > omsgCount) {
 772       mb.mb_threaded = 0;
 773       c_sort((void*)-1);
 774    }
 775
 776    if (!(fm & FEDIT_NEWMAIL))
 777       pstate &= ~PS_SAW_COMMAND;
 778
 779    if (options & OPT_EXISTONLY) {
 780       i = (msgCount == 0);
 781       goto jleave;
 782    }
 783
 784    if (!(fm & FEDIT_NEWMAIL) && (fm & FEDIT_SYSBOX) && msgCount == 0) {
 785       if (mb.mb_type == MB_MAILDIR /* XXX ?? */ && !ok_blook(emptystart))
 786          n_err(_("No mail at \"%s\"\n"), name);
 787       i = 1;
 788       goto jleave;
 789    }
 790
 791    if ((fm & FEDIT_NEWMAIL) && msgCount > omsgCount)
 792       newmailinfo(omsgCount);
 793    i = 0;
 794 jleave:
 795    NYD_LEAVE;
 796    return i;
 797 }
 798
 799 FL void
 800 maildir_quit(void)
 801 {
 802    sighandler_type saveint;
 803    struct cw cw;
 804    NYD_ENTER;
 805
 806    if (cwget(&cw) == STOP) {
 807       n_alert(_("Cannot open current directory"));
 808       goto jleave;
 809    }
 810
 811    saveint = safe_signal(SIGINT, SIG_IGN);
 812
 813    if (chdir(mailname) == -1) {
 814       n_err(_("Cannot change directory to \"%s\"\n"), mailname);
 815       cwrelse(&cw);
 816       safe_signal(SIGINT, saveint);
 817       goto jleave;
 818    }
 819
 820    if (sigsetjmp(_maildir_jmp, 1) == 0) {
 821       if (saveint != SIG_IGN)
 822          safe_signal(SIGINT, &__maildircatch_hold);
 823       maildir_update();
 824    }
 825
 826    safe_signal(SIGINT, saveint);
 827
 828    if (cwret(&cw) == STOP)
 829       n_panic(_("Cannot change back to current directory"));
 830    cwrelse(&cw);
 831 jleave:
 832    NYD_LEAVE;
 833 }
 834
 835 FL enum okay
 836 maildir_append(char const *name, FILE *fp, long offset)
 837 {
 838    char *buf, *bp, *lp;
 839    size_t bufsize, buflen, cnt;
 840    off_t off1 = -1, offs;
 841    long size;
 842    int flag;
 843    enum {_NONE = 0, _INHEAD = 1<<0, _NLSEP = 1<<1} state;
 844    enum okay rv;
 845    NYD_ENTER;
 846
 847    if ((rv = mkmaildir(name)) != OKAY)
 848       goto jleave;
 849
 850    buf = smalloc(bufsize = LINESIZE); /* TODO line pool; signals */
 851    buflen = 0;
 852    cnt = fsize(fp);
 853    offs = offset /* BSD will move due to O_APPEND! ftell(fp) */;
 854    size = 0;
 855
 856    srelax_hold();
 857    for (flag = MNEW, state = _NLSEP;;) {
 858       bp = fgetline(&buf, &bufsize, &cnt, &buflen, fp, 1);
 859
 860       if (bp == NULL ||
 861             ((state & (_INHEAD | _NLSEP)) == _NLSEP &&
 862              is_head(buf, buflen, FAL0))) {
 863          if (off1 != (off_t)-1) {
 864             if ((rv = maildir_append1(name, fp, off1, size, flag)) == STOP)
 865                goto jfree;
 866             srelax();
 867             if (fseek(fp, offs + buflen, SEEK_SET) == -1) {
 868                rv = STOP;
 869                goto jfree;
 870             }
 871          }
 872          off1 = offs + buflen;
 873          size = 0;
 874          state = _INHEAD;
 875          flag = MNEW;
 876
 877          if (bp == NULL)
 878             break;
 879       } else
 880          size += buflen;
 881       offs += buflen;
 882
 883       state &= ~_NLSEP;
 884       if (buf[0] == '\n') {
 885          state &= ~_INHEAD;
 886          state |= _NLSEP;
 887       } else if (state & _INHEAD) {
 888          if (!ascncasecmp(buf, "status", 6)) {
 889             lp = buf + 6;
 890             while (whitechar(*lp))
 891                ++lp;
 892             if (*lp == ':')
 893                while (*++lp != '\0')
 894                   switch (*lp) {
 895                   case 'R':
 896                      flag |= MREAD;
 897                      break;
 898                   case 'O':
 899                      flag &= ~MNEW;
 900                      break;
 901                   }
 902          } else if (!ascncasecmp(buf, "x-status", 8)) {
 903             lp = buf + 8;
 904             while (whitechar(*lp))
 905                ++lp;
 906             if (*lp == ':') {
 907                while (*++lp != '\0')
 908                   switch (*lp) {
 909                   case 'F':
 910                      flag |= MFLAGGED;
 911                      break;
 912                   case 'A':
 913                      flag |= MANSWERED;
 914                      break;
 915                   case 'T':
 916                      flag |= MDRAFTED;
 917                      break;
 918                   }
 919             }
 920          }
 921       }
 922    }
 923    assert(rv == OKAY);
 924 jfree:
 925    srelax_rele();
 926    free(buf);
 927 jleave:
 928    NYD_LEAVE;
 929    return rv;
 930 }
 931
 932 FL enum okay
 933 maildir_remove(char const *name)
 934 {
 935    enum okay rv = STOP;
 936    NYD_ENTER;
 937
 938    if (subdir_remove(name, "tmp") == STOP ||
 939          subdir_remove(name, "new") == STOP ||
 940          subdir_remove(name, "cur") == STOP)
 941       goto jleave;
 942    if (rmdir(name) == -1) {
 943       n_perr(name, 0);
 944       goto jleave;
 945    }
 946    rv = OKAY;
 947 jleave:
 948    NYD_LEAVE;
 949    return rv;
 950 }
 951
 952 /* s-it-mode */