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 Simply truncating paths isn't really it.
   4  *
   5  * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
   6  * Copyright (c) 2012 - 2018 Steffen (Daode) Nurpmeso <steffen@sdaoden.eu>.
   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 /* a_maildir_tbl should be a hash-indexed array of trees! */
  50 static struct message **a_maildir_tbl, **a_maildir_tbl_top;
  51 static ui32_t a_maildir_tbl_prime, a_maildir_tbl_maxdist;
  52 static sigjmp_buf    _maildir_jmp;
  53
  54 static void             __maildircatch(int s);
  55 static void             __maildircatch_hold(int s);
  56
  57 /* Do some cleanup in the tmp/ subdir */
  58 static void             _cleantmp(void);
  59
  60 static int              _maildir_setfile1(char const *name, enum fedit_mode fm,
  61                            int omsgCount);
  62
  63 static int a_maildir_cmp(void const *a, void const *b);
  64
  65 static int              _maildir_subdir(char const *name, char const *sub,
  66                            enum fedit_mode fm);
  67
  68 static void             _maildir_append(char const *name, char const *sub,
  69                            char const *fn);
  70
  71 static void             readin(char const *name, struct message *m);
  72
  73 static void             maildir_update(void);
  74
  75 static void             _maildir_move(struct n_timespec const *tsp,
  76                            struct message *m);
  77
  78 static char *           mkname(struct n_timespec const *tsp, enum mflag f,
  79                            char const *pref);
  80
  81 static enum okay        maildir_append1(struct n_timespec const *tsp,
  82                            char const *name, FILE *fp, off_t off1,
  83                            long size, enum mflag flag);
  84
  85 static enum okay        trycreate(char const *name);
  86
  87 static enum okay        mkmaildir(char const *name);
  88
  89 static struct message * mdlook(char const *name, struct message *data);
  90
  91 static void             mktable(void);
  92
  93 static enum okay        subdir_remove(char const *name, char const *sub);
  94
  95 static void
  96 __maildircatch(int s)
  97 {
  98    NYD_X; /* Signal handler */
  99    siglongjmp(_maildir_jmp, s);
 100 }
 101
 102 static void
 103 __maildircatch_hold(int s)
 104 {
 105    NYD_X; /* Signal handler */
 106    n_UNUSED(s);
 107    /* TODO no STDIO in signal handler, no _() tr's -- pre-translate interrupt
 108     * TODO globally; */
 109    n_err_sighdl(_("\nImportant operation in progress: "
 110       "interrupt again to forcefully abort\n"));
 111    safe_signal(SIGINT, &__maildircatch);
 112 }
 113
 114 static void
 115 _cleantmp(void)
 116 {
 117    struct stat st;
 118    struct n_string s, *sp;
 119    si64_t now;
 120    DIR *dirp;
 121    struct dirent *dp;
 122    NYD_ENTER;
 123
 124    if ((dirp = opendir("tmp")) == NULL)
 125       goto jleave;
 126
 127    now = n_time_now(FAL0)->ts_sec;
 128    sp = n_string_creat_auto(&s);
 129
 130    while ((dp = readdir(dirp)) != NULL) {
 131       if (dp->d_name[0] == '.')
 132          continue;
 133
 134       sp = n_string_trunc(sp, 0);
 135       sp = n_string_push_buf(sp, "tmp/", sizeof("tmp/") -1);
 136       sp = n_string_push_cp(sp, dp->d_name);
 137       if (stat(n_string_cp(sp), &st) == -1)
 138          continue;
 139       if (st.st_atime + 36*3600 < now)
 140          unlink(sp->s_dat);
 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 = ((n_poption & n_PO_R_FLAG) || (fm & FEDIT_RDONLY))
 157          ? 0 : MB_DELE;
 158    if ((i = _maildir_subdir(name, "cur", fm)) != 0)
 159       goto jleave;
 160    if ((i = _maildir_subdir(name, "new", fm)) != 0)
 161       goto jleave;
 162    _maildir_append(name, NULL, NULL);
 163
 164    n_autorec_relax_create();
 165    for (i = ((fm & FEDIT_NEWMAIL) ? omsgCount : 0); i < msgCount; ++i) {
 166       readin(name, message + i);
 167       n_autorec_relax_unroll();
 168    }
 169    n_autorec_relax_gut();
 170
 171    if (fm & FEDIT_NEWMAIL) {
 172       if (msgCount > omsgCount)
 173          qsort(&message[omsgCount], msgCount - omsgCount, sizeof *message,
 174             &a_maildir_cmp);
 175    } else if (msgCount)
 176       qsort(message, msgCount, sizeof *message, &a_maildir_cmp);
 177    i = msgCount;
 178 jleave:
 179    NYD_LEAVE;
 180    return i;
 181 }
 182
 183 static int
 184 a_maildir_cmp(void const *xa, void const *xb){
 185    char const *cpa, *cpa_pid, *cpb, *cpb_pid;
 186    union {struct message const *mp; char const *cp;} a, b;
 187    si64_t at, bt;
 188    int rv;
 189    NYD2_ENTER;
 190
 191    a.mp = xa;
 192    b.mp = xb;
 193
 194    /* We could have parsed the time somewhen in the past, do a quick shot */
 195    at = (si64_t)a.mp->m_time;
 196    bt = (si64_t)b.mp->m_time;
 197    if(at != 0 && bt != 0 && (at -= bt) != 0)
 198       goto jret;
 199
 200    /* Otherwise we need to parse the name */
 201    a.cp = &a.mp->m_maildir_file[4];
 202    b.cp = &b.mp->m_maildir_file[4];
 203
 204    /* Interpret time stored in name, and use it for comparison */
 205    if(((n_idec_si64_cp(&at, a.cp, 10, &cpa)
 206             ) & n_IDEC_STATE_EMASK) != n_IDEC_STATE_EBASE || *cpa != '.' ||
 207          a.cp == cpa)
 208       goto jm1; /* Fishy */
 209    if(((n_idec_si64_cp(&bt, b.cp, 10, &cpb)
 210             ) & n_IDEC_STATE_EMASK) != n_IDEC_STATE_EBASE || *cpb != '.' ||
 211          b.cp == cpb)
 212       goto j1; /* Fishy */
 213
 214    if((at -= bt) != 0)
 215       goto jret;
 216
 217    /* If the seconds part does not work, go deeper.
 218     * We use de-facto standard "maildir — E-mail directory" from the Courier
 219     * mail server, also used by, e.g., Dovecot: sec.MusecPpid.hostname:2,flags.
 220     * However, a different name convention exists which uses
 221     * sec.pid_counter.hostname:2,flags.
 222     * First go for usec/counter, then pid */
 223
 224    /* A: exact "standard"? */
 225    cpa_pid = NULL;
 226    a.cp = ++cpa;
 227    if((rv = *a.cp) == 'M')
 228       ;
 229    /* Known compat? */
 230    else if(digitchar(rv)){
 231       cpa_pid = a.cp++;
 232       while((rv = *a.cp) != '\0' && rv != '_')
 233          ++a.cp;
 234       if(rv == '\0')
 235          goto jm1; /* Fishy */
 236    }
 237    /* This is compatible to what dovecot does, it surely does not do so
 238     * for nothing, but i have no idea, but am too stupid to ask */
 239    else for(;; rv = *++a.cp){
 240       if(rv == 'M')
 241          break;
 242       if(rv == '\0' || rv == '.' || rv == n_MAILDIR_SEPARATOR)
 243          goto jm1; /* Fishy */
 244    }
 245    ++a.cp;
 246    if(((n_idec_si64_cp(&at, a.cp, 10, &cpa)
 247             ) & n_IDEC_STATE_EMASK) != n_IDEC_STATE_EBASE)
 248       goto jm1; /* Fishy */
 249
 250    /* B: as above */
 251    cpb_pid = NULL;
 252    b.cp = ++cpb;
 253    if((rv = *b.cp) == 'M')
 254       ;
 255    else if(digitchar(rv)){
 256       cpb_pid = b.cp++;
 257       while((rv = *b.cp) != '\0' && rv != '_')
 258          ++b.cp;
 259       if(rv == '\0')
 260          goto j1;
 261    }else for(;; rv = *++b.cp){
 262       if(rv == 'M')
 263          break;
 264       if(rv == '\0' || rv == '.' || rv == n_MAILDIR_SEPARATOR)
 265          goto jm1;
 266    }
 267    ++b.cp;
 268    if(((n_idec_si64_cp(&bt, b.cp, 10, &cpb)
 269             ) & n_IDEC_STATE_EMASK) != n_IDEC_STATE_EBASE)
 270       goto j1;
 271
 272    if((at -= bt) != 0)
 273       goto jret;
 274
 275    /* So this gets hairy: sort by PID, then hostname */
 276    if(cpa_pid != NULL){
 277       a.cp = cpa_pid;
 278       xa = cpa;
 279    }else{
 280       a.cp = cpa;
 281       if(*a.cp++ != 'P')
 282          goto jm1; /* Fishy */
 283    }
 284    if(((n_idec_si64_cp(&at, a.cp, 10, &cpa)
 285             ) & n_IDEC_STATE_EMASK) != n_IDEC_STATE_EBASE)
 286       goto jm1; /* Fishy */
 287
 288    if(cpb_pid != NULL){
 289       b.cp = cpb_pid;
 290       xb = cpb;
 291    }else{
 292       b.cp = cpb;
 293       if(*b.cp++ != 'P')
 294          goto j1; /* Fishy */
 295    }
 296    if(((n_idec_si64_cp(&bt, b.cp, 10, &cpb)
 297             ) & n_IDEC_STATE_EMASK) != n_IDEC_STATE_EBASE)
 298       goto jm1; /* Fishy */
 299
 300    if((at -= bt) != 0)
 301       goto jret;
 302
 303    /* Hostname */
 304    a.cp = (cpa_pid != NULL) ? xa : cpa;
 305    b.cp = (cpb_pid != NULL) ? xb : cpb;
 306    for(;; ++a.cp, ++b.cp){
 307       char ac, bc;
 308
 309       ac = *a.cp;
 310       at = (ac != '\0' && ac != n_MAILDIR_SEPARATOR);
 311       bc = *b.cp;
 312       bt = (bc != '\0' && bc != n_MAILDIR_SEPARATOR);
 313       if((at -= bt) != 0)
 314          break;
 315       at = ac;
 316       if((at -= bc) != 0)
 317          break;
 318       if(ac == '\0')
 319          break;
 320    }
 321
 322 jret:
 323    rv = (at == 0 ? 0 : (at < 0 ? -1 : 1));
 324 jleave:
 325    NYD2_LEAVE;
 326    return rv;
 327 jm1:
 328    rv = -1;
 329    goto jleave;
 330 j1:
 331    rv = 1;
 332    goto jleave;
 333 }
 334
 335 static int
 336 _maildir_subdir(char const *name, char const *sub, enum fedit_mode fm)
 337 {
 338    DIR *dirp;
 339    struct dirent *dp;
 340    int rv;
 341    NYD_ENTER;
 342
 343    if ((dirp = opendir(sub)) == NULL) {
 344       n_err(_("Cannot open directory %s\n"),
 345          n_shexp_quote_cp(savecatsep(name, '/', sub), FAL0));
 346       rv = -1;
 347       goto jleave;
 348    }
 349    if (access(sub, W_OK) == -1)
 350       mb.mb_perm = 0;
 351    while ((dp = readdir(dirp)) != NULL) {
 352       if (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' ||
 353             (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
 354          continue;
 355       if (dp->d_name[0] == '.')
 356          continue;
 357       if (!(fm & FEDIT_NEWMAIL) || mdlook(dp->d_name, NULL) == NULL)
 358          _maildir_append(name, sub, dp->d_name);
 359    }
 360    closedir(dirp);
 361    rv = 0;
 362 jleave:
 363    NYD_LEAVE;
 364    return rv;
 365 }
 366
 367 static void
 368 _maildir_append(char const *name, char const *sub, char const *fn)
 369 {
 370    struct message *m;
 371    time_t t = 0;
 372    enum mflag f = MUSED | MNOFROM | MNEWEST;
 373    char const *cp, *xp;
 374    NYD_ENTER;
 375    n_UNUSED(name);
 376
 377    if (fn != NULL && sub != NULL) {
 378       if (!strcmp(sub, "new"))
 379          f |= MNEW;
 380
 381       /* C99 */{
 382          si64_t tib;
 383
 384          (void)/*TODO*/n_idec_si64_cp(&tib, fn, 10, &xp);
 385          t = (time_t)tib;
 386       }
 387
 388       if ((cp = strrchr(xp, ',')) != NULL && PTRCMP(cp, >, xp + 2) &&
 389             cp[-1] == '2' && cp[-2] == n_MAILDIR_SEPARATOR) {
 390          while (*++cp != '\0') {
 391             switch (*cp) {
 392             case 'F':
 393                f |= MFLAGGED;
 394                break;
 395             case 'R':
 396                f |= MANSWERED;
 397                break;
 398             case 'S':
 399                f |= MREAD;
 400                break;
 401             case 'T':
 402                f |= MDELETED;
 403                break;
 404             case 'D':
 405                f |= MDRAFT;
 406                break;
 407             }
 408          }
 409       }
 410    }
 411
 412    /* Ensure room (and a NULLified last entry) */
 413    ++msgCount;
 414    message_append(NULL);
 415    --msgCount;
 416
 417    if (fn == NULL || sub == NULL)
 418       goto jleave;
 419
 420    m = &message[msgCount++];
 421    /* C99 */{
 422       char *tmp;
 423       size_t sz, i;
 424
 425       i = strlen(fn) +1;
 426       sz = strlen(sub);
 427       m->m_maildir_file = tmp = n_alloc(sz + 1 + i);
 428       memcpy(tmp, sub, sz);
 429       tmp[sz++] = '/';
 430       memcpy(&tmp[sz], fn, i);
 431    }
 432    m->m_time = t;
 433    m->m_flag = f;
 434    m->m_maildir_hash = n_torek_hash(fn);
 435 jleave:
 436    NYD_LEAVE;
 437    return;
 438 }
 439
 440 static void
 441 readin(char const *name, struct message *m)
 442 {
 443    char *buf;
 444    size_t bufsize, buflen, cnt;
 445    long size = 0, lines = 0;
 446    off_t offset;
 447    FILE *fp;
 448    int emptyline = 0;
 449    NYD_ENTER;
 450
 451    if ((fp = Fopen(m->m_maildir_file, "r")) == NULL) {
 452       n_err(_("Cannot read %s for message %lu\n"),
 453          n_shexp_quote_cp(savecatsep(name, '/', m->m_maildir_file), FAL0),
 454          (ul_i)PTR2SIZE(m - message + 1));
 455       m->m_flag |= MHIDDEN;
 456       goto jleave;
 457    }
 458
 459    cnt = fsize(fp);
 460    fseek(mb.mb_otf, 0L, SEEK_END);
 461    offset = ftell(mb.mb_otf);
 462    buf = smalloc(bufsize = LINESIZE);
 463    buflen = 0;
 464    while (fgetline(&buf, &bufsize, &cnt, &buflen, fp, 1) != NULL) {
 465       /* Since we simply copy over data without doing any transfer
 466        * encoding reclassification/adjustment we *have* to perform
 467        * RFC 4155 compliant From_ quoting here */
 468       if (emptyline && is_head(buf, buflen, FAL0)) {
 469          putc('>', mb.mb_otf);
 470          ++size;
 471       }
 472       size += fwrite(buf, 1, buflen, mb.mb_otf);/*XXX err hdling*/
 473       emptyline = (*buf == '\n');
 474       ++lines;
 475    }
 476    free(buf);
 477    if (!emptyline) {
 478       putc('\n', mb.mb_otf);
 479       ++lines;
 480       ++size;
 481    }
 482
 483    Fclose(fp);
 484    fflush(mb.mb_otf);
 485    m->m_size = m->m_xsize = size;
 486    m->m_lines = m->m_xlines = lines;
 487    m->m_block = mailx_blockof(offset);
 488    m->m_offset = mailx_offsetof(offset);
 489    substdate(m);
 490 jleave:
 491    NYD_LEAVE;
 492 }
 493
 494 static void
 495 maildir_update(void)
 496 {
 497    struct message *m;
 498    struct n_timespec const *tsp;
 499    int dodel, c, gotcha = 0, held = 0, modflags = 0;
 500    NYD_ENTER;
 501
 502    if (mb.mb_perm == 0)
 503       goto jfree;
 504
 505    if (!(n_pstate & n_PS_EDIT)) {
 506       holdbits();
 507       for (m = message, c = 0; PTRCMP(m, <, message + msgCount); ++m) {
 508          if (m->m_flag & MBOX)
 509             c++;
 510       }
 511       if (c > 0)
 512          if (makembox() == STOP)
 513             goto jbypass;
 514    }
 515
 516    tsp = n_time_now(TRU1); /* TODO FAL0, eventloop update! */
 517
 518    n_autorec_relax_create();
 519    for (m = message, gotcha = 0, held = 0; PTRCMP(m, <, message + msgCount);
 520          ++m) {
 521       if (n_pstate & n_PS_EDIT)
 522          dodel = m->m_flag & MDELETED;
 523       else
 524          dodel = !((m->m_flag & MPRESERVE) || !(m->m_flag & MTOUCH));
 525       if (dodel) {
 526          if (unlink(m->m_maildir_file) < 0)
 527             n_err(_("Cannot delete file %s for message %lu\n"),
 528                n_shexp_quote_cp(savecatsep(mailname, '/', m->m_maildir_file),
 529                   FAL0), (ul_i)PTR2SIZE(m - message + 1));
 530          else
 531             ++gotcha;
 532       } else {
 533          if ((m->m_flag & (MREAD | MSTATUS)) == (MREAD | MSTATUS) ||
 534                (m->m_flag & (MNEW | MBOXED | MSAVED | MSTATUS | MFLAG |
 535                MUNFLAG | MANSWER | MUNANSWER | MDRAFT | MUNDRAFT))) {
 536             _maildir_move(tsp, m);
 537             n_autorec_relax_unroll();
 538             ++modflags;
 539          }
 540          ++held;
 541       }
 542    }
 543    n_autorec_relax_gut();
 544
 545 jbypass:
 546    if ((gotcha || modflags) && (n_pstate & n_PS_EDIT)) {
 547       fprintf(n_stdout, "%s %s\n",
 548          n_shexp_quote_cp(displayname, FAL0),
 549          ((ok_blook(bsdcompat) || ok_blook(bsdmsgs))
 550           ? _("complete") : _("updated.")));
 551    } else if (held && !(n_pstate & n_PS_EDIT) && mb.mb_perm != 0) {
 552       if (held == 1)
 553          fprintf(n_stdout, _("Held 1 message in %s\n"), displayname);
 554       else
 555          fprintf(n_stdout, _("Held %d messages in %s\n"), held, displayname);
 556    }
 557    fflush(n_stdout);
 558 jfree:
 559    for (m = message; PTRCMP(m, <, message + msgCount); ++m)
 560       free(n_UNCONST(m->m_maildir_file));
 561    NYD_LEAVE;
 562 }
 563
 564 static void
 565 _maildir_move(struct n_timespec const *tsp, struct message *m)
 566 {
 567    char *fn, *newfn;
 568    NYD_ENTER;
 569
 570    fn = mkname(tsp, m->m_flag, m->m_maildir_file + 4);
 571    newfn = savecat("cur/", fn);
 572    if (!strcmp(m->m_maildir_file, newfn))
 573       goto jleave;
 574    if (link(m->m_maildir_file, newfn) == -1) {
 575       n_err(_("Cannot link %s to %s: message %lu not touched\n"),
 576          n_shexp_quote_cp(savecatsep(mailname, '/', m->m_maildir_file), FAL0),
 577          n_shexp_quote_cp(savecatsep(mailname, '/', newfn), FAL0),
 578          (ul_i)PTR2SIZE(m - message + 1));
 579       goto jleave;
 580    }
 581    if (unlink(m->m_maildir_file) == -1)
 582       n_err(_("Cannot unlink %s\n"),
 583          n_shexp_quote_cp(savecatsep(mailname, '/', m->m_maildir_file), FAL0));
 584 jleave:
 585    NYD_LEAVE;
 586 }
 587
 588 static char *
 589 mkname(struct n_timespec const *tsp, enum mflag f, char const *pref)
 590 {
 591    static char *node;
 592    static struct n_timespec ts;
 593
 594    char *cp;
 595    int size, n, i;
 596    NYD_ENTER;
 597
 598    if (pref == NULL) {
 599       si64_t s;
 600
 601       if(n_pid == 0)
 602          n_pid = getpid();
 603
 604       if (node == NULL) {
 605          cp = n_nodename(FAL0);
 606          n = size = 0;
 607          do {
 608             if (UICMP(32, n, <, size + 8))
 609                node = srealloc(node, size += 20);
 610             switch (*cp) {
 611             case '/':
 612                node[n++] = '\\', node[n++] = '0',
 613                node[n++] = '5', node[n++] = '7';
 614                break;
 615             case ':':
 616                node[n++] = '\\', node[n++] = '0',
 617                node[n++] = '7', node[n++] = '2';
 618                break;
 619             default:
 620                node[n++] = *cp;
 621             }
 622          } while (*cp++ != '\0');
 623       }
 624
 625       /* Problem: Courier spec uses microseconds, not nanoseconds */
 626       if((s = tsp->ts_sec) > ts.ts_sec){
 627          ts.ts_sec = s;
 628          ts.ts_nsec = tsp->ts_nsec / (n_DATE_NANOSSEC / n_DATE_MICROSSEC);
 629       }else{
 630          s = tsp->ts_nsec / (n_DATE_NANOSSEC / n_DATE_MICROSSEC);
 631          if(s <= ts.ts_nsec)
 632             s = ts.ts_nsec + 1;
 633          if(s < n_DATE_MICROSSEC)
 634             ts.ts_nsec = s;
 635          else{
 636             ++ts.ts_sec;
 637             ts.ts_nsec = 0;
 638          }
 639       }
 640
 641       /* Create a name according to Courier spec */
 642       size = 60 + strlen(node);
 643       cp = n_autorec_alloc(size);
 644       n = snprintf(cp, size, "%" PRId64 ".M%" PRIdZ "P%ld.%s:2,",
 645             ts.ts_sec, ts.ts_nsec, (long)n_pid, node);
 646    } else {
 647       size = (n = strlen(pref)) + 13;
 648       cp = salloc(size);
 649       memcpy(cp, pref, n +1);
 650       for (i = n; i > 3; --i)
 651          if (cp[i - 1] == ',' && cp[i - 2] == '2' &&
 652                cp[i - 3] == n_MAILDIR_SEPARATOR) {
 653             n = i;
 654             break;
 655          }
 656       if (i <= 3) {
 657          memcpy(cp + n, ":2,", 3 +1);
 658          n += 3;
 659       }
 660    }
 661    if (n < size - 7) {
 662       if (f & MDRAFTED)
 663          cp[n++] = 'D';
 664       if (f & MFLAGGED)
 665          cp[n++] = 'F';
 666       if (f & MANSWERED)
 667          cp[n++] = 'R';
 668       if (f & MREAD)
 669          cp[n++] = 'S';
 670       if (f & MDELETED)
 671          cp[n++] = 'T';
 672       cp[n] = '\0';
 673    }
 674    NYD_LEAVE;
 675    return cp;
 676 }
 677
 678 static enum okay
 679 maildir_append1(struct n_timespec const *tsp, char const *name, FILE *fp,
 680    off_t off1, long size, enum mflag flag)
 681 {
 682    char buf[4096], *fn, *tfn, *nfn;
 683    struct stat st;
 684    FILE *op;
 685    size_t nlen, flen, n;
 686    enum okay rv = STOP;
 687    NYD_ENTER;
 688
 689    nlen = strlen(name);
 690
 691    /* Create a unique temporary file */
 692    for (nfn = (char*)0xA /* XXX no magic */;; n_msleep(500, FAL0)) {
 693       flen = strlen(fn = mkname(tsp, flag, NULL));
 694       tfn = n_autorec_alloc(n = nlen + flen + 6);
 695       snprintf(tfn, n, "%s/tmp/%s", name, fn);
 696
 697       /* Use "wx" for O_EXCL XXX stat(2) rather redundant; coverity:TOCTOU */
 698       if ((!stat(tfn, &st) || n_err_no == n_ERR_NOENT) &&
 699             (op = Fopen(tfn, "wx")) != NULL)
 700          break;
 701
 702       nfn = (char*)(PTR2SIZE(nfn) - 1);
 703       if (nfn == NULL) {
 704          n_err(_("Can't create an unique file name in %s\n"),
 705             n_shexp_quote_cp(savecat(name, "/tmp"), FAL0));
 706          goto jleave;
 707       }
 708    }
 709
 710    if (fseek(fp, off1, SEEK_SET) == -1)
 711       goto jtmperr;
 712    while (size > 0) {
 713       size_t z = UICMP(z, size, >, sizeof buf) ? sizeof buf : (size_t)size;
 714
 715       if (z != (n = fread(buf, 1, z, fp)) || n != fwrite(buf, 1, n, op)) {
 716 jtmperr:
 717          n_err(_("Error writing to %s\n"), n_shexp_quote_cp(tfn, FAL0));
 718          Fclose(op);
 719          goto jerr;
 720       }
 721       size -= n;
 722    }
 723    Fclose(op);
 724
 725    nfn = n_autorec_alloc(n = nlen + flen + 6);
 726    snprintf(nfn, n, "%s/new/%s", name, fn);
 727    if (link(tfn, nfn) == -1) {
 728       n_err(_("Cannot link %s to %s\n"), n_shexp_quote_cp(tfn, FAL0),
 729          n_shexp_quote_cp(nfn, FAL0));
 730       goto jerr;
 731    }
 732    rv = OKAY;
 733 jerr:
 734    if (unlink(tfn) == -1)
 735       n_err(_("Cannot unlink %s\n"), n_shexp_quote_cp(tfn, FAL0));
 736 jleave:
 737    NYD_LEAVE;
 738    return rv;
 739 }
 740
 741 static enum okay
 742 trycreate(char const *name)
 743 {
 744    struct stat st;
 745    enum okay rv = STOP;
 746    NYD_ENTER;
 747
 748    if (!stat(name, &st)) {
 749       if (!S_ISDIR(st.st_mode)) {
 750          n_err(_("%s is not a directory\n"), n_shexp_quote_cp(name, FAL0));
 751          goto jleave;
 752       }
 753    } else if (!n_path_mkdir(name)) {
 754       n_err(_("Cannot create directory %s\n"), n_shexp_quote_cp(name, FAL0));
 755       goto jleave;
 756    }
 757    rv = OKAY;
 758 jleave:
 759    NYD_LEAVE;
 760    return rv;
 761 }
 762
 763 static enum okay
 764 mkmaildir(char const *name) /* TODO proper cleanup on error; use path[] loop */
 765 {
 766    char *np;
 767    size_t sz;
 768    enum okay rv = STOP;
 769    NYD_ENTER;
 770
 771    if (trycreate(name) == OKAY) {
 772       np = ac_alloc((sz = strlen(name)) + 4 +1);
 773       memcpy(np, name, sz);
 774       memcpy(np + sz, "/tmp", 4 +1);
 775       if (trycreate(np) == OKAY) {
 776          memcpy(np + sz, "/new", 4 +1);
 777          if (trycreate(np) == OKAY) {
 778             memcpy(np + sz, "/cur", 4 +1);
 779             rv = trycreate(np);
 780          }
 781       }
 782       ac_free(np);
 783    }
 784    NYD_LEAVE;
 785    return rv;
 786 }
 787
 788 static struct message *
 789 mdlook(char const *name, struct message *data)
 790 {
 791    struct message **mpp, *mp;
 792    ui32_t h, i;
 793    NYD_ENTER;
 794
 795    if(data != NULL)
 796       i = data->m_maildir_hash;
 797    else
 798       i = n_torek_hash(name);
 799    h = i;
 800    mpp = &a_maildir_tbl[i %= a_maildir_tbl_prime];
 801
 802    for(i = 0;;){
 803       if((mp = *mpp) == NULL){
 804          if(n_UNLIKELY(data != NULL)){
 805             *mpp = mp = data;
 806             if(i > a_maildir_tbl_maxdist)
 807                a_maildir_tbl_maxdist = i;
 808          }
 809          break;
 810       }else if(mp->m_maildir_hash == h && !strcmp(&mp->m_maildir_file[4], name))
 811          break;
 812
 813       if(n_UNLIKELY(mpp++ == a_maildir_tbl_top))
 814          mpp = a_maildir_tbl;
 815       if(++i > a_maildir_tbl_maxdist && n_UNLIKELY(data == NULL)){
 816          mp = NULL;
 817          break;
 818       }
 819    }
 820    NYD_LEAVE;
 821    return mp;
 822 }
 823
 824 static void
 825 mktable(void)
 826 {
 827    struct message *mp;
 828    size_t i;
 829    NYD_ENTER;
 830
 831    i = a_maildir_tbl_prime = msgCount;
 832    i <<= 1;
 833    do
 834       a_maildir_tbl_prime = n_prime_next(a_maildir_tbl_prime);
 835    while(a_maildir_tbl_prime < i);
 836    a_maildir_tbl = n_calloc(a_maildir_tbl_prime, sizeof *a_maildir_tbl);
 837    a_maildir_tbl_top = &a_maildir_tbl[a_maildir_tbl_prime - 1];
 838    a_maildir_tbl_maxdist = 0;
 839    for(mp = message, i = msgCount; i-- != 0; ++mp)
 840       mdlook(&mp->m_maildir_file[4], mp);
 841    NYD_LEAVE;
 842 }
 843
 844 static enum okay
 845 subdir_remove(char const *name, char const *sub)
 846 {
 847    char *path;
 848    int pathsize, pathend, namelen, sublen, n;
 849    DIR *dirp;
 850    struct dirent *dp;
 851    enum okay rv = STOP;
 852    NYD_ENTER;
 853
 854    namelen = strlen(name);
 855    sublen = strlen(sub);
 856    path = smalloc(pathsize = namelen + sublen + 30 +1);
 857    memcpy(path, name, namelen);
 858    path[namelen] = '/';
 859    memcpy(path + namelen + 1, sub, sublen);
 860    path[namelen + sublen + 1] = '/';
 861    path[pathend = namelen + sublen + 2] = '\0';
 862
 863    if ((dirp = opendir(path)) == NULL) {
 864       n_perr(path, 0);
 865       goto jleave;
 866    }
 867    while ((dp = readdir(dirp)) != NULL) {
 868       if (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' ||
 869             (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
 870          continue;
 871       if (dp->d_name[0] == '.')
 872          continue;
 873       n = strlen(dp->d_name);
 874       if (UICMP(32, pathend + n +1, >, pathsize))
 875          path = srealloc(path, pathsize = pathend + n + 30);
 876       memcpy(path + pathend, dp->d_name, n +1);
 877       if (unlink(path) == -1) {
 878          n_perr(path, 0);
 879          closedir(dirp);
 880          goto jleave;
 881       }
 882    }
 883    closedir(dirp);
 884
 885    path[pathend] = '\0';
 886    if (rmdir(path) == -1) {
 887       n_perr(path, 0);
 888       goto jleave;
 889    }
 890    rv = OKAY;
 891 jleave:
 892    free(path);
 893    NYD_LEAVE;
 894    return rv;
 895 }
 896
 897 FL int
 898 maildir_setfile(char const * volatile name, enum fedit_mode fm)
 899 {
 900    sighandler_type volatile saveint;
 901    struct cw cw;
 902    char const *emsg;
 903    int omsgCount;
 904    int volatile i = -1;
 905    NYD_ENTER;
 906
 907    omsgCount = msgCount;
 908    if (cwget(&cw) == STOP) {
 909       n_alert(_("Cannot open current directory"));
 910       goto jleave;
 911    }
 912
 913    if (!(fm & FEDIT_NEWMAIL) && !quit(FAL0))
 914       goto jleave;
 915
 916    saveint = safe_signal(SIGINT, SIG_IGN);
 917
 918    if (!(fm & FEDIT_NEWMAIL)) {
 919       if (fm & FEDIT_SYSBOX)
 920          n_pstate &= ~n_PS_EDIT;
 921       else
 922          n_pstate |= n_PS_EDIT;
 923       if (mb.mb_itf) {
 924          fclose(mb.mb_itf);
 925          mb.mb_itf = NULL;
 926       }
 927       if (mb.mb_otf) {
 928          fclose(mb.mb_otf);
 929          mb.mb_otf = NULL;
 930       }
 931       initbox(name);
 932       mb.mb_type = MB_MAILDIR;
 933    }
 934
 935    if(!n_is_dir(name, FAL0)){
 936       emsg = N_("Not a maildir: %s\n");
 937       goto jerr;
 938    }else if(chdir(name) < 0){
 939       emsg = N_("Cannot enter maildir://%s\n");
 940 jerr:
 941       n_err(V_(emsg), n_shexp_quote_cp(name, FAL0));
 942       mb.mb_type = MB_VOID;
 943       *mailname = '\0';
 944       msgCount = 0;
 945       cwrelse(&cw);
 946       safe_signal(SIGINT, saveint);
 947       goto jleave;
 948    }
 949
 950    a_maildir_tbl = NULL;
 951    if (sigsetjmp(_maildir_jmp, 1) == 0) {
 952       if (fm & FEDIT_NEWMAIL)
 953          mktable();
 954       if (saveint != SIG_IGN)
 955          safe_signal(SIGINT, &__maildircatch);
 956       i = _maildir_setfile1(name, fm, omsgCount);
 957    }
 958    if ((fm & FEDIT_NEWMAIL) && a_maildir_tbl != NULL)
 959       n_free(a_maildir_tbl);
 960
 961    safe_signal(SIGINT, saveint);
 962
 963    if (i < 0) {
 964       mb.mb_type = MB_VOID;
 965       *mailname = '\0';
 966       msgCount = 0;
 967    }
 968
 969    if (cwret(&cw) == STOP)
 970       n_panic(_("Cannot change back to current directory"));
 971    cwrelse(&cw);
 972
 973    setmsize(msgCount);
 974    if ((fm & FEDIT_NEWMAIL) && mb.mb_sorted && msgCount > omsgCount) {
 975       mb.mb_threaded = 0;
 976       c_sort((void*)-1);
 977    }
 978
 979    if (!(fm & FEDIT_NEWMAIL)) {
 980       n_pstate &= ~n_PS_SAW_COMMAND;
 981       n_pstate |= n_PS_SETFILE_OPENED;
 982    }
 983
 984    if ((n_poption & n_PO_EXISTONLY) && !(n_poption & n_PO_HEADERLIST)) {
 985       i = (msgCount == 0);
 986       goto jleave;
 987    }
 988
 989    if (!(fm & FEDIT_NEWMAIL) && (fm & FEDIT_SYSBOX) && msgCount == 0) {
 990       if (mb.mb_type == MB_MAILDIR /* XXX ?? */ && !ok_blook(emptystart))
 991          n_err(_("No mail at %s\n"), n_shexp_quote_cp(name, FAL0));
 992       i = 1;
 993       goto jleave;
 994    }
 995
 996    if ((fm & FEDIT_NEWMAIL) && msgCount > omsgCount)
 997       newmailinfo(omsgCount);
 998    i = 0;
 999 jleave:
1000    NYD_LEAVE;
1001    return i;
1002 }
1003
1004 FL bool_t
1005 maildir_quit(bool_t hold_sigs_on)
1006 {
1007    sighandler_type saveint;
1008    struct cw cw;
1009    bool_t rv;
1010    NYD_ENTER;
1011
1012    if(hold_sigs_on)
1013       rele_sigs();
1014
1015    rv = FAL0;
1016
1017    if (cwget(&cw) == STOP) {
1018       n_alert(_("Cannot open current directory"));
1019       goto jleave;
1020    }
1021
1022    saveint = safe_signal(SIGINT, SIG_IGN);
1023
1024    if (chdir(mailname) == -1) {
1025       n_err(_("Cannot change directory to %s\n"),
1026          n_shexp_quote_cp(mailname, FAL0));
1027       cwrelse(&cw);
1028       safe_signal(SIGINT, saveint);
1029       goto jleave;
1030    }
1031
1032    if (sigsetjmp(_maildir_jmp, 1) == 0) {
1033       if (saveint != SIG_IGN)
1034          safe_signal(SIGINT, &__maildircatch_hold);
1035       maildir_update();
1036    }
1037
1038    safe_signal(SIGINT, saveint);
1039
1040    if (cwret(&cw) == STOP)
1041       n_panic(_("Cannot change back to current directory"));
1042    cwrelse(&cw);
1043    rv = TRU1;
1044 jleave:
1045    if(hold_sigs_on)
1046       hold_sigs();
1047    NYD_LEAVE;
1048    return rv;
1049 }
1050
1051 FL enum okay
1052 maildir_append(char const *name, FILE *fp, long offset)
1053 {
1054    struct n_timespec const *tsp;
1055    char *buf, *bp, *lp;
1056    size_t bufsize, buflen, cnt;
1057    off_t off1 = -1, offs;
1058    long size;
1059    int flag;
1060    enum {_NONE = 0, _INHEAD = 1<<0, _NLSEP = 1<<1} state;
1061    enum okay rv;
1062    NYD_ENTER;
1063
1064    if ((rv = mkmaildir(name)) != OKAY)
1065       goto jleave;
1066
1067    buf = smalloc(bufsize = LINESIZE); /* TODO line pool; signals */
1068    buflen = 0;
1069    cnt = fsize(fp);
1070    offs = offset /* BSD will move due to O_APPEND! ftell(fp) */;
1071    size = 0;
1072    tsp = n_time_now(TRU1); /* TODO -> eventloop */
1073
1074    n_autorec_relax_create();
1075    for (flag = MNEW, state = _NLSEP;;) {
1076       bp = fgetline(&buf, &bufsize, &cnt, &buflen, fp, 1);
1077
1078       if (bp == NULL ||
1079             ((state & (_INHEAD | _NLSEP)) == _NLSEP &&
1080              is_head(buf, buflen, FAL0))) {
1081          if (off1 != (off_t)-1) {
1082             if ((rv = maildir_append1(tsp, name, fp, off1, size, flag)) == STOP)
1083                goto jfree;
1084             n_autorec_relax_unroll();
1085             if (fseek(fp, offs + buflen, SEEK_SET) == -1) {
1086                rv = STOP;
1087                goto jfree;
1088             }
1089          }
1090          off1 = offs + buflen;
1091          size = 0;
1092          state = _INHEAD;
1093          flag = MNEW;
1094
1095          if (bp == NULL)
1096             break;
1097       } else
1098          size += buflen;
1099       offs += buflen;
1100
1101       state &= ~_NLSEP;
1102       if (buf[0] == '\n') {
1103          state &= ~_INHEAD;
1104          state |= _NLSEP;
1105       } else if (state & _INHEAD) {
1106          if (!ascncasecmp(buf, "status", 6)) {
1107             lp = buf + 6;
1108             while (whitechar(*lp))
1109                ++lp;
1110             if (*lp == ':')
1111                while (*++lp != '\0')
1112                   switch (*lp) {
1113                   case 'R':
1114                      flag |= MREAD;
1115                      break;
1116                   case 'O':
1117                      flag &= ~MNEW;
1118                      break;
1119                   }
1120          } else if (!ascncasecmp(buf, "x-status", 8)) {
1121             lp = buf + 8;
1122             while (whitechar(*lp))
1123                ++lp;
1124             if (*lp == ':') {
1125                while (*++lp != '\0')
1126                   switch (*lp) {
1127                   case 'F':
1128                      flag |= MFLAGGED;
1129                      break;
1130                   case 'A':
1131                      flag |= MANSWERED;
1132                      break;
1133                   case 'T':
1134                      flag |= MDRAFTED;
1135                      break;
1136                   }
1137             }
1138          }
1139       }
1140    }
1141    assert(rv == OKAY);
1142 jfree:
1143    n_autorec_relax_gut();
1144    free(buf);
1145 jleave:
1146    NYD_LEAVE;
1147    return rv;
1148 }
1149
1150 FL enum okay
1151 maildir_remove(char const *name)
1152 {
1153    enum okay rv = STOP;
1154    NYD_ENTER;
1155
1156    if (subdir_remove(name, "tmp") == STOP ||
1157          subdir_remove(name, "new") == STOP ||
1158          subdir_remove(name, "cur") == STOP)
1159       goto jleave;
1160    if (rmdir(name) == -1) {
1161       n_perr(name, 0);
1162       goto jleave;
1163    }
1164    rv = OKAY;
1165 jleave:
1166    NYD_LEAVE;
1167    return rv;
1168 }
1169
1170 /* s-it-mode */