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 - 2017 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 static struct message **a_maildir_table;
  50 static ui32_t a_maildir_prime;
  51 static sigjmp_buf    _maildir_jmp;
  52
  53 static void             __maildircatch(int s);
  54 static void             __maildircatch_hold(int s);
  55
  56 /* Do some cleanup in the tmp/ subdir */
  57 static void             _cleantmp(void);
  58
  59 static int              _maildir_setfile1(char const *name, enum fedit_mode fm,
  60                            int omsgCount);
  61
  62 static int a_maildir_cmp(void const *a, void const *b);
  63
  64 static int              _maildir_subdir(char const *name, char const *sub,
  65                            enum fedit_mode fm);
  66
  67 static void             _maildir_append(char const *name, char const *sub,
  68                            char const *fn);
  69
  70 static void             readin(char const *name, struct message *m);
  71
  72 static void             maildir_update(void);
  73
  74 static void             _maildir_move(struct n_timespec const *tsp,
  75                            struct message *m);
  76
  77 static char *           mkname(struct n_timespec const *tsp, enum mflag f,
  78                            char const *pref);
  79
  80 static enum okay        maildir_append1(struct n_timespec const *tsp,
  81                            char const *name, FILE *fp, off_t off1,
  82                            long size, enum mflag flag);
  83
  84 static enum okay        trycreate(char const *name);
  85
  86 static enum okay        mkmaildir(char const *name);
  87
  88 static struct message * mdlook(char const *name, struct message *data);
  89
  90 static void             mktable(void);
  91
  92 static enum okay        subdir_remove(char const *name, char const *sub);
  93
  94 static void
  95 __maildircatch(int s)
  96 {
  97    NYD_X; /* Signal handler */
  98    siglongjmp(_maildir_jmp, s);
  99 }
 100
 101 static void
 102 __maildircatch_hold(int s)
 103 {
 104    NYD_X; /* Signal handler */
 105    n_UNUSED(s);
 106    /* TODO no STDIO in signal handler, no _() tr's -- pre-translate interrupt
 107     * TODO globally; */
 108    n_err_sighdl(_("\nImportant operation in progress: "
 109       "interrupt again to forcefully abort\n"));
 110    safe_signal(SIGINT, &__maildircatch);
 111 }
 112
 113 static void
 114 _cleantmp(void)
 115 {
 116    struct stat st;
 117    struct n_string s, *sp;
 118    si64_t now;
 119    DIR *dirp;
 120    struct dirent *dp;
 121    NYD_ENTER;
 122
 123    if ((dirp = opendir("tmp")) == NULL)
 124       goto jleave;
 125
 126    now = n_time_now(FAL0)->ts_sec;
 127    sp = n_string_creat_auto(&s);
 128
 129    while ((dp = readdir(dirp)) != NULL) {
 130       if (dp->d_name[0] == '.')
 131          continue;
 132
 133       sp = n_string_trunc(sp, 0);
 134       sp = n_string_push_buf(sp, "tmp/", sizeof("tmp/") -1);
 135       sp = n_string_push_cp(sp, dp->d_name);
 136       if (stat(n_string_cp(sp), &st) == -1)
 137          continue;
 138       if (st.st_atime + 36*3600 < now)
 139          unlink(sp->s_dat);
 140    }
 141    closedir(dirp);
 142 jleave:
 143    NYD_LEAVE;
 144 }
 145
 146 static int
 147 _maildir_setfile1(char const *name, enum fedit_mode fm, int omsgCount)
 148 {
 149    int i;
 150    NYD_ENTER;
 151
 152    if (!(fm & FEDIT_NEWMAIL))
 153       _cleantmp();
 154
 155    mb.mb_perm = ((n_poption & n_PO_R_FLAG) || (fm & FEDIT_RDONLY))
 156          ? 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    n_autorec_relax_create();
 164    for (i = ((fm & FEDIT_NEWMAIL) ? omsgCount : 0); i < msgCount; ++i) {
 165       readin(name, message + i);
 166       n_autorec_relax_unroll();
 167    }
 168    n_autorec_relax_gut();
 169
 170    if (fm & FEDIT_NEWMAIL) {
 171       if (msgCount > omsgCount)
 172          qsort(&message[omsgCount], msgCount - omsgCount, sizeof *message,
 173             &a_maildir_cmp);
 174    } else if (msgCount)
 175       qsort(message, msgCount, sizeof *message, &a_maildir_cmp);
 176    i = msgCount;
 177 jleave:
 178    NYD_LEAVE;
 179    return i;
 180 }
 181
 182 static int
 183 a_maildir_cmp(void const *xa, void const *xb){
 184    char const *cpa, *cpa_pid, *cpb, *cpb_pid;
 185    union {struct message const *mp; char const *cp;} a, b;
 186    si64_t at, bt;
 187    int rv;
 188    NYD2_ENTER;
 189
 190    a.mp = xa;
 191    b.mp = xb;
 192
 193    /* We could have parsed the time somewhen in the past, do a quick shot */
 194    at = (si64_t)a.mp->m_time;
 195    bt = (si64_t)b.mp->m_time;
 196    if(at != 0 && bt != 0 && (at -= bt) != 0)
 197       goto jret;
 198
 199    /* Otherwise we need to parse the name */
 200    a.cp = &a.mp->m_maildir_file[4];
 201    b.cp = &b.mp->m_maildir_file[4];
 202
 203    /* Interpret time stored in name, and use it for comparison */
 204    if(((n_idec_si64_cp(&at, a.cp, 10, &cpa)
 205             ) & n_IDEC_STATE_EMASK) != n_IDEC_STATE_EBASE || *cpa != '.' ||
 206          a.cp == cpa)
 207       goto jm1; /* Fishy */
 208    if(((n_idec_si64_cp(&bt, b.cp, 10, &cpb)
 209             ) & n_IDEC_STATE_EMASK) != n_IDEC_STATE_EBASE || *cpb != '.' ||
 210          b.cp == cpb)
 211       goto j1; /* Fishy */
 212
 213    if((at -= bt) != 0)
 214       goto jret;
 215
 216    /* If the seconds part does not work, go deeper.
 217     * We use de-facto standard "maildir — E-mail directory" from the Courier
 218     * mail server, also used by, e.g., Dovecot: sec.MusecPpid.hostname:2,flags.
 219     * However, a different name convention exists which uses
 220     * sec.pid_counter.hostname:2,flags.
 221     * First go for usec/counter, then pid */
 222
 223    /* A: exact "standard"? */
 224    cpa_pid = NULL;
 225    a.cp = ++cpa;
 226    if((rv = *a.cp) == 'M')
 227       ;
 228    /* Known compat? */
 229    else if(digitchar(rv)){
 230       cpa_pid = a.cp++;
 231       while((rv = *a.cp) != '\0' && rv != '_')
 232          ++a.cp;
 233       if(rv == '\0')
 234          goto jm1; /* Fishy */
 235    }
 236    /* This is compatible to what dovecot does, it surely does not do so
 237     * for nothing, but i have no idea, but am too stupid to ask */
 238    else for(;; rv = *++a.cp){
 239       if(rv == 'M')
 240          break;
 241       if(rv == '\0' || rv == '.' || rv == n_MAILDIR_SEPARATOR)
 242          goto jm1; /* Fishy */
 243    }
 244    ++a.cp;
 245    if(((n_idec_si64_cp(&at, a.cp, 10, &cpa)
 246             ) & n_IDEC_STATE_EMASK) != n_IDEC_STATE_EBASE)
 247       goto jm1; /* Fishy */
 248
 249    /* B: as above */
 250    cpb_pid = NULL;
 251    b.cp = ++cpb;
 252    if((rv = *b.cp) == 'M')
 253       ;
 254    else if(digitchar(rv)){
 255       cpb_pid = b.cp++;
 256       while((rv = *b.cp) != '\0' && rv != '_')
 257          ++b.cp;
 258       if(rv == '\0')
 259          goto j1;
 260    }else for(;; rv = *++b.cp){
 261       if(rv == 'M')
 262          break;
 263       if(rv == '\0' || rv == '.' || rv == n_MAILDIR_SEPARATOR)
 264          goto jm1;
 265    }
 266    ++b.cp;
 267    if(((n_idec_si64_cp(&bt, b.cp, 10, &cpb)
 268             ) & n_IDEC_STATE_EMASK) != n_IDEC_STATE_EBASE)
 269       goto j1;
 270
 271    if((at -= bt) != 0)
 272       goto jret;
 273
 274    /* So this gets hairy: sort by PID, then hostname */
 275    if(cpa_pid != NULL){
 276       a.cp = cpa_pid;
 277       xa = cpa;
 278    }else{
 279       a.cp = cpa;
 280       if(*a.cp++ != 'P')
 281          goto jm1; /* Fishy */
 282    }
 283    if(((n_idec_si64_cp(&at, a.cp, 10, &cpa)
 284             ) & n_IDEC_STATE_EMASK) != n_IDEC_STATE_EBASE)
 285       goto jm1; /* Fishy */
 286
 287    if(cpb_pid != NULL){
 288       b.cp = cpb_pid;
 289       xb = cpb;
 290    }else{
 291       b.cp = cpb;
 292       if(*b.cp++ != 'P')
 293          goto j1; /* Fishy */
 294    }
 295    if(((n_idec_si64_cp(&bt, b.cp, 10, &cpb)
 296             ) & n_IDEC_STATE_EMASK) != n_IDEC_STATE_EBASE)
 297       goto jm1; /* Fishy */
 298
 299    if((at -= bt) != 0)
 300       goto jret;
 301
 302    /* Hostname */
 303    a.cp = (cpa_pid != NULL) ? xa : cpa;
 304    b.cp = (cpb_pid != NULL) ? xb : cpb;
 305    for(;; ++a.cp, ++b.cp){
 306       char ac, bc;
 307
 308       ac = *a.cp;
 309       at = (ac != '\0' && ac != n_MAILDIR_SEPARATOR);
 310       bc = *b.cp;
 311       bt = (bc != '\0' && bc != n_MAILDIR_SEPARATOR);
 312       if((at -= bt) != 0)
 313          break;
 314       at = ac;
 315       if((at -= bc) != 0)
 316          break;
 317    }
 318
 319 jret:
 320    rv = (at == 0 ? 0 : (at < 0 ? -1 : 1));
 321 jleave:
 322    NYD2_LEAVE;
 323    return rv;
 324 jm1:
 325    rv = -1;
 326    goto jleave;
 327 j1:
 328    rv = 1;
 329    goto jleave;
 330 }
 331
 332 static int
 333 _maildir_subdir(char const *name, char const *sub, enum fedit_mode fm)
 334 {
 335    DIR *dirp;
 336    struct dirent *dp;
 337    int rv;
 338    NYD_ENTER;
 339
 340    if ((dirp = opendir(sub)) == NULL) {
 341       n_err(_("Cannot open directory %s\n"),
 342          n_shexp_quote_cp(savecatsep(name, '/', sub), FAL0));
 343       rv = -1;
 344       goto jleave;
 345    }
 346    if (access(sub, W_OK) == -1)
 347       mb.mb_perm = 0;
 348    while ((dp = readdir(dirp)) != NULL) {
 349       if (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' ||
 350             (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
 351          continue;
 352       if (dp->d_name[0] == '.')
 353          continue;
 354       if (!(fm & FEDIT_NEWMAIL) || mdlook(dp->d_name, NULL) == NULL)
 355          _maildir_append(name, sub, dp->d_name);
 356    }
 357    closedir(dirp);
 358    rv = 0;
 359 jleave:
 360    NYD_LEAVE;
 361    return rv;
 362 }
 363
 364 static void
 365 _maildir_append(char const *name, char const *sub, char const *fn)
 366 {
 367    struct message *m;
 368    time_t t = 0;
 369    enum mflag f = MUSED | MNOFROM | MNEWEST;
 370    char const *cp, *xp;
 371    NYD_ENTER;
 372    n_UNUSED(name);
 373
 374    if (fn != NULL && sub != NULL) {
 375       if (!strcmp(sub, "new"))
 376          f |= MNEW;
 377
 378       /* C99 */{
 379          si64_t tib;
 380
 381          (void)/*TODO*/n_idec_si64_cp(&tib, fn, 10, &xp);
 382          t = (time_t)tib;
 383       }
 384
 385       if ((cp = strrchr(xp, ',')) != NULL && PTRCMP(cp, >, xp + 2) &&
 386             cp[-1] == '2' && cp[-2] == n_MAILDIR_SEPARATOR) {
 387          while (*++cp != '\0') {
 388             switch (*cp) {
 389             case 'F':
 390                f |= MFLAGGED;
 391                break;
 392             case 'R':
 393                f |= MANSWERED;
 394                break;
 395             case 'S':
 396                f |= MREAD;
 397                break;
 398             case 'T':
 399                f |= MDELETED;
 400                break;
 401             case 'D':
 402                f |= MDRAFT;
 403                break;
 404             }
 405          }
 406       }
 407    }
 408
 409    /* Ensure room (and a NULLified last entry) */
 410    ++msgCount;
 411    message_append(NULL);
 412    --msgCount;
 413
 414    if (fn == NULL || sub == NULL)
 415       goto jleave;
 416
 417    m = &message[msgCount++];
 418    /* C99 */{
 419       char *tmp;
 420       size_t sz, i;
 421
 422       i = strlen(fn) +1;
 423       sz = strlen(sub);
 424       m->m_maildir_file = tmp = smalloc(sz + 1 + i);
 425       memcpy(tmp, sub, sz);
 426       tmp[sz++] = '/';
 427       memcpy(&tmp[sz], fn, i);
 428    }
 429    m->m_time = t;
 430    m->m_flag = f;
 431    m->m_maildir_hash = ~n_torek_hash(fn);
 432 jleave:
 433    NYD_LEAVE;
 434    return;
 435 }
 436
 437 static void
 438 readin(char const *name, struct message *m)
 439 {
 440    char *buf;
 441    size_t bufsize, buflen, cnt;
 442    long size = 0, lines = 0;
 443    off_t offset;
 444    FILE *fp;
 445    int emptyline = 0;
 446    NYD_ENTER;
 447
 448    if ((fp = Fopen(m->m_maildir_file, "r")) == NULL) {
 449       n_err(_("Cannot read %s for message %lu\n"),
 450          n_shexp_quote_cp(savecatsep(name, '/', m->m_maildir_file), FAL0),
 451          (ul_i)PTR2SIZE(m - message + 1));
 452       m->m_flag |= MHIDDEN;
 453       goto jleave;
 454    }
 455
 456    cnt = fsize(fp);
 457    fseek(mb.mb_otf, 0L, SEEK_END);
 458    offset = ftell(mb.mb_otf);
 459    buf = smalloc(bufsize = LINESIZE);
 460    buflen = 0;
 461    while (fgetline(&buf, &bufsize, &cnt, &buflen, fp, 1) != NULL) {
 462       /* Since we simply copy over data without doing any transfer
 463        * encoding reclassification/adjustment we *have* to perform
 464        * RFC 4155 compliant From_ quoting here */
 465       if (emptyline && is_head(buf, buflen, FAL0)) {
 466          putc('>', mb.mb_otf);
 467          ++size;
 468       }
 469       size += fwrite(buf, 1, buflen, mb.mb_otf);/*XXX err hdling*/
 470       emptyline = (*buf == '\n');
 471       ++lines;
 472    }
 473    free(buf);
 474    if (!emptyline) {
 475       putc('\n', mb.mb_otf);
 476       ++lines;
 477       ++size;
 478    }
 479
 480    Fclose(fp);
 481    fflush(mb.mb_otf);
 482    m->m_size = m->m_xsize = size;
 483    m->m_lines = m->m_xlines = lines;
 484    m->m_block = mailx_blockof(offset);
 485    m->m_offset = mailx_offsetof(offset);
 486    substdate(m);
 487 jleave:
 488    NYD_LEAVE;
 489 }
 490
 491 static void
 492 maildir_update(void)
 493 {
 494    struct message *m;
 495    struct n_timespec const *tsp;
 496    int dodel, c, gotcha = 0, held = 0, modflags = 0;
 497    NYD_ENTER;
 498
 499    if (mb.mb_perm == 0)
 500       goto jfree;
 501
 502    if (!(n_pstate & n_PS_EDIT)) {
 503       holdbits();
 504       for (m = message, c = 0; PTRCMP(m, <, message + msgCount); ++m) {
 505          if (m->m_flag & MBOX)
 506             c++;
 507       }
 508       if (c > 0)
 509          if (makembox() == STOP)
 510             goto jbypass;
 511    }
 512
 513    tsp = n_time_now(TRU1); /* TODO FAL0, eventloop update! */
 514
 515    n_autorec_relax_create();
 516    for (m = message, gotcha = 0, held = 0; PTRCMP(m, <, message + msgCount);
 517          ++m) {
 518       if (n_pstate & n_PS_EDIT)
 519          dodel = m->m_flag & MDELETED;
 520       else
 521          dodel = !((m->m_flag & MPRESERVE) || !(m->m_flag & MTOUCH));
 522       if (dodel) {
 523          if (unlink(m->m_maildir_file) < 0)
 524             n_err(_("Cannot delete file %s for message %lu\n"),
 525                n_shexp_quote_cp(savecatsep(mailname, '/', m->m_maildir_file),
 526                   FAL0), (ul_i)PTR2SIZE(m - message + 1));
 527          else
 528             ++gotcha;
 529       } else {
 530          if ((m->m_flag & (MREAD | MSTATUS)) == (MREAD | MSTATUS) ||
 531                (m->m_flag & (MNEW | MBOXED | MSAVED | MSTATUS | MFLAG |
 532                MUNFLAG | MANSWER | MUNANSWER | MDRAFT | MUNDRAFT))) {
 533             _maildir_move(tsp, m);
 534             n_autorec_relax_unroll();
 535             ++modflags;
 536          }
 537          ++held;
 538       }
 539    }
 540    n_autorec_relax_gut();
 541
 542 jbypass:
 543    if ((gotcha || modflags) && (n_pstate & n_PS_EDIT)) {
 544       fprintf(n_stdout, "%s %s\n",
 545          n_shexp_quote_cp(displayname, FAL0),
 546          ((ok_blook(bsdcompat) || ok_blook(bsdmsgs))
 547           ? _("complete") : _("updated.")));
 548    } else if (held && !(n_pstate & n_PS_EDIT) && mb.mb_perm != 0) {
 549       if (held == 1)
 550          fprintf(n_stdout, _("Held 1 message in %s\n"), displayname);
 551       else
 552          fprintf(n_stdout, _("Held %d messages in %s\n"), held, displayname);
 553    }
 554    fflush(n_stdout);
 555 jfree:
 556    for (m = message; PTRCMP(m, <, message + msgCount); ++m)
 557       free(n_UNCONST(m->m_maildir_file));
 558    NYD_LEAVE;
 559 }
 560
 561 static void
 562 _maildir_move(struct n_timespec const *tsp, struct message *m)
 563 {
 564    char *fn, *newfn;
 565    NYD_ENTER;
 566
 567    fn = mkname(tsp, m->m_flag, m->m_maildir_file + 4);
 568    newfn = savecat("cur/", fn);
 569    if (!strcmp(m->m_maildir_file, newfn))
 570       goto jleave;
 571    if (link(m->m_maildir_file, newfn) == -1) {
 572       n_err(_("Cannot link %s to %s: message %lu not touched\n"),
 573          n_shexp_quote_cp(savecatsep(mailname, '/', m->m_maildir_file), FAL0),
 574          n_shexp_quote_cp(savecatsep(mailname, '/', newfn), FAL0),
 575          (ul_i)PTR2SIZE(m - message + 1));
 576       goto jleave;
 577    }
 578    if (unlink(m->m_maildir_file) == -1)
 579       n_err(_("Cannot unlink %s\n"),
 580          n_shexp_quote_cp(savecatsep(mailname, '/', m->m_maildir_file), FAL0));
 581 jleave:
 582    NYD_LEAVE;
 583 }
 584
 585 static char *
 586 mkname(struct n_timespec const *tsp, enum mflag f, char const *pref)
 587 {
 588    static char *node;
 589    static struct n_timespec ts;
 590
 591    char *cp;
 592    int size, n, i;
 593    NYD_ENTER;
 594
 595    if (pref == NULL) {
 596       si64_t s;
 597
 598       if(n_pid == 0)
 599          n_pid = getpid();
 600
 601       if (node == NULL) {
 602          cp = n_nodename(FAL0);
 603          n = size = 0;
 604          do {
 605             if (UICMP(32, n, <, size + 8))
 606                node = srealloc(node, size += 20);
 607             switch (*cp) {
 608             case '/':
 609                node[n++] = '\\', node[n++] = '0',
 610                node[n++] = '5', node[n++] = '7';
 611                break;
 612             case ':':
 613                node[n++] = '\\', node[n++] = '0',
 614                node[n++] = '7', node[n++] = '2';
 615                break;
 616             default:
 617                node[n++] = *cp;
 618             }
 619          } while (*cp++ != '\0');
 620       }
 621
 622       /* Problem: Courier spec uses microseconds, not nanoseconds */
 623       if((s = tsp->ts_sec) > ts.ts_sec){
 624          ts.ts_sec = s;
 625          ts.ts_nsec = tsp->ts_nsec / (n_DATE_NANOSSEC / n_DATE_MICROSSEC);
 626       }else{
 627          s = tsp->ts_nsec / (n_DATE_NANOSSEC / n_DATE_MICROSSEC);
 628          if(s <= ts.ts_nsec)
 629             s = ts.ts_nsec + 1;
 630          if(s < n_DATE_MICROSSEC)
 631             ts.ts_nsec = s;
 632          else{
 633             ++ts.ts_sec;
 634             ts.ts_nsec = 0;
 635          }
 636       }
 637
 638       /* Create a name according to Courier spec */
 639       size = 60 + strlen(node);
 640       cp = n_autorec_alloc(size);
 641       n = snprintf(cp, size, "%" PRId64 ".M%" PRIdZ "P%ld.%s:2,",
 642             ts.ts_sec, ts.ts_nsec, (long)n_pid, node);
 643    } else {
 644       size = (n = strlen(pref)) + 13;
 645       cp = salloc(size);
 646       memcpy(cp, pref, n +1);
 647       for (i = n; i > 3; --i)
 648          if (cp[i - 1] == ',' && cp[i - 2] == '2' &&
 649                cp[i - 3] == n_MAILDIR_SEPARATOR) {
 650             n = i;
 651             break;
 652          }
 653       if (i <= 3) {
 654          memcpy(cp + n, ":2,", 3 +1);
 655          n += 3;
 656       }
 657    }
 658    if (n < size - 7) {
 659       if (f & MDRAFTED)
 660          cp[n++] = 'D';
 661       if (f & MFLAGGED)
 662          cp[n++] = 'F';
 663       if (f & MANSWERED)
 664          cp[n++] = 'R';
 665       if (f & MREAD)
 666          cp[n++] = 'S';
 667       if (f & MDELETED)
 668          cp[n++] = 'T';
 669       cp[n] = '\0';
 670    }
 671    NYD_LEAVE;
 672    return cp;
 673 }
 674
 675 static enum okay
 676 maildir_append1(struct n_timespec const *tsp, char const *name, FILE *fp,
 677    off_t off1, long size, enum mflag flag)
 678 {
 679    char buf[4096], *fn, *tfn, *nfn;
 680    struct stat st;
 681    FILE *op;
 682    size_t nlen, flen, n;
 683    enum okay rv = STOP;
 684    NYD_ENTER;
 685
 686    nlen = strlen(name);
 687
 688    /* Create a unique temporary file */
 689    for (nfn = (char*)0xA /* XXX no magic */;; n_msleep(500, FAL0)) {
 690       flen = strlen(fn = mkname(tsp, flag, NULL));
 691       tfn = n_autorec_alloc(n = nlen + flen + 6);
 692       snprintf(tfn, n, "%s/tmp/%s", name, fn);
 693
 694       /* Use "wx" for O_EXCL XXX stat(2) rather redundant; coverity:TOCTOU */
 695       if ((!stat(tfn, &st) || n_err_no == n_ERR_NOENT) &&
 696             (op = Fopen(tfn, "wx")) != NULL)
 697          break;
 698
 699       nfn = (char*)(PTR2SIZE(nfn) - 1);
 700       if (nfn == NULL) {
 701          n_err(_("Can't create an unique file name in %s\n"),
 702             n_shexp_quote_cp(savecat(name, "/tmp"), FAL0));
 703          goto jleave;
 704       }
 705    }
 706
 707    if (fseek(fp, off1, SEEK_SET) == -1)
 708       goto jtmperr;
 709    while (size > 0) {
 710       size_t z = UICMP(z, size, >, sizeof buf) ? sizeof buf : (size_t)size;
 711
 712       if (z != (n = fread(buf, 1, z, fp)) || n != fwrite(buf, 1, n, op)) {
 713 jtmperr:
 714          n_err(_("Error writing to %s\n"), n_shexp_quote_cp(tfn, FAL0));
 715          Fclose(op);
 716          goto jerr;
 717       }
 718       size -= n;
 719    }
 720    Fclose(op);
 721
 722    nfn = n_autorec_alloc(n = nlen + flen + 6);
 723    snprintf(nfn, n, "%s/new/%s", name, fn);
 724    if (link(tfn, nfn) == -1) {
 725       n_err(_("Cannot link %s to %s\n"), n_shexp_quote_cp(tfn, FAL0),
 726          n_shexp_quote_cp(nfn, FAL0));
 727       goto jerr;
 728    }
 729    rv = OKAY;
 730 jerr:
 731    if (unlink(tfn) == -1)
 732       n_err(_("Cannot unlink %s\n"), n_shexp_quote_cp(tfn, FAL0));
 733 jleave:
 734    NYD_LEAVE;
 735    return rv;
 736 }
 737
 738 static enum okay
 739 trycreate(char const *name)
 740 {
 741    struct stat st;
 742    enum okay rv = STOP;
 743    NYD_ENTER;
 744
 745    if (!stat(name, &st)) {
 746       if (!S_ISDIR(st.st_mode)) {
 747          n_err(_("%s is not a directory\n"), n_shexp_quote_cp(name, FAL0));
 748          goto jleave;
 749       }
 750    } else if (!n_path_mkdir(name)) {
 751       n_err(_("Cannot create directory %s\n"), n_shexp_quote_cp(name, FAL0));
 752       goto jleave;
 753    }
 754    rv = OKAY;
 755 jleave:
 756    NYD_LEAVE;
 757    return rv;
 758 }
 759
 760 static enum okay
 761 mkmaildir(char const *name) /* TODO proper cleanup on error; use path[] loop */
 762 {
 763    char *np;
 764    size_t sz;
 765    enum okay rv = STOP;
 766    NYD_ENTER;
 767
 768    if (trycreate(name) == OKAY) {
 769       np = ac_alloc((sz = strlen(name)) + 4 +1);
 770       memcpy(np, name, sz);
 771       memcpy(np + sz, "/tmp", 4 +1);
 772       if (trycreate(np) == OKAY) {
 773          memcpy(np + sz, "/new", 4 +1);
 774          if (trycreate(np) == OKAY) {
 775             memcpy(np + sz, "/cur", 4 +1);
 776             rv = trycreate(np);
 777          }
 778       }
 779       ac_free(np);
 780    }
 781    NYD_LEAVE;
 782    return rv;
 783 }
 784
 785 static struct message *
 786 mdlook(char const *name, struct message *data)
 787 {
 788    struct message *mp;
 789    ui32_t c, h, n = 0;
 790    NYD_ENTER;
 791
 792    if (data && data->m_maildir_hash)
 793       h = ~data->m_maildir_hash;
 794    else
 795       h = n_torek_hash(name);
 796    h %= a_maildir_prime;
 797    c = h;
 798    mp = a_maildir_table[c];
 799
 800    while (mp != NULL) {
 801       if (!strcmp(mp->m_maildir_file + 4, name))
 802          break;
 803       c += (n & 1) ? -((n+1)/2) * ((n+1)/2) : ((n+1)/2) * ((n+1)/2);
 804       n++;
 805       while (c >= a_maildir_prime)
 806          c -= a_maildir_prime;
 807       mp = a_maildir_table[c];
 808    }
 809    if (data != NULL && mp == NULL)
 810       mp = data;
 811    NYD_LEAVE;
 812    return mp;
 813 }
 814
 815 static void
 816 mktable(void)
 817 {
 818    struct message *mp;
 819    size_t i;
 820    NYD_ENTER;
 821
 822    a_maildir_prime = n_prime_next(msgCount);
 823    a_maildir_table = scalloc(a_maildir_prime, sizeof *a_maildir_table);
 824    for (mp = message, i = msgCount; i-- != 0; ++mp)
 825       mdlook(mp->m_maildir_file + 4, mp);
 826    NYD_LEAVE;
 827 }
 828
 829 static enum okay
 830 subdir_remove(char const *name, char const *sub)
 831 {
 832    char *path;
 833    int pathsize, pathend, namelen, sublen, n;
 834    DIR *dirp;
 835    struct dirent *dp;
 836    enum okay rv = STOP;
 837    NYD_ENTER;
 838
 839    namelen = strlen(name);
 840    sublen = strlen(sub);
 841    path = smalloc(pathsize = namelen + sublen + 30 +1);
 842    memcpy(path, name, namelen);
 843    path[namelen] = '/';
 844    memcpy(path + namelen + 1, sub, sublen);
 845    path[namelen + sublen + 1] = '/';
 846    path[pathend = namelen + sublen + 2] = '\0';
 847
 848    if ((dirp = opendir(path)) == NULL) {
 849       n_perr(path, 0);
 850       goto jleave;
 851    }
 852    while ((dp = readdir(dirp)) != NULL) {
 853       if (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' ||
 854             (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
 855          continue;
 856       if (dp->d_name[0] == '.')
 857          continue;
 858       n = strlen(dp->d_name);
 859       if (UICMP(32, pathend + n +1, >, pathsize))
 860          path = srealloc(path, pathsize = pathend + n + 30);
 861       memcpy(path + pathend, dp->d_name, n +1);
 862       if (unlink(path) == -1) {
 863          n_perr(path, 0);
 864          closedir(dirp);
 865          goto jleave;
 866       }
 867    }
 868    closedir(dirp);
 869
 870    path[pathend] = '\0';
 871    if (rmdir(path) == -1) {
 872       n_perr(path, 0);
 873       goto jleave;
 874    }
 875    rv = OKAY;
 876 jleave:
 877    free(path);
 878    NYD_LEAVE;
 879    return rv;
 880 }
 881
 882 FL int
 883 maildir_setfile(char const * volatile name, enum fedit_mode fm)
 884 {
 885    sighandler_type volatile saveint;
 886    struct cw cw;
 887    char const *emsg;
 888    int omsgCount;
 889    int volatile i = -1;
 890    NYD_ENTER;
 891
 892    omsgCount = msgCount;
 893    if (cwget(&cw) == STOP) {
 894       n_alert(_("Cannot open current directory"));
 895       goto jleave;
 896    }
 897
 898    if (!(fm & FEDIT_NEWMAIL) && !quit(FAL0))
 899       goto jleave;
 900
 901    saveint = safe_signal(SIGINT, SIG_IGN);
 902
 903    if (!(fm & FEDIT_NEWMAIL)) {
 904       if (fm & FEDIT_SYSBOX)
 905          n_pstate &= ~n_PS_EDIT;
 906       else
 907          n_pstate |= n_PS_EDIT;
 908       if (mb.mb_itf) {
 909          fclose(mb.mb_itf);
 910          mb.mb_itf = NULL;
 911       }
 912       if (mb.mb_otf) {
 913          fclose(mb.mb_otf);
 914          mb.mb_otf = NULL;
 915       }
 916       initbox(name);
 917       mb.mb_type = MB_MAILDIR;
 918    }
 919
 920    if(!n_is_dir(name, FAL0)){
 921       emsg = N_("Not a maildir: %s\n");
 922       goto jerr;
 923    }else if(chdir(name) < 0){
 924       emsg = N_("Cannot enter maildir://%s\n");
 925 jerr:
 926       n_err(V_(emsg), n_shexp_quote_cp(name, FAL0));
 927       mb.mb_type = MB_VOID;
 928       *mailname = '\0';
 929       msgCount = 0;
 930       cwrelse(&cw);
 931       safe_signal(SIGINT, saveint);
 932       goto jleave;
 933    }
 934
 935    a_maildir_table = NULL;
 936    if (sigsetjmp(_maildir_jmp, 1) == 0) {
 937       if (fm & FEDIT_NEWMAIL)
 938          mktable();
 939       if (saveint != SIG_IGN)
 940          safe_signal(SIGINT, &__maildircatch);
 941       i = _maildir_setfile1(name, fm, omsgCount);
 942    }
 943    if ((fm & FEDIT_NEWMAIL) && a_maildir_table != NULL)
 944       free(a_maildir_table);
 945
 946    safe_signal(SIGINT, saveint);
 947
 948    if (i < 0) {
 949       mb.mb_type = MB_VOID;
 950       *mailname = '\0';
 951       msgCount = 0;
 952    }
 953
 954    if (cwret(&cw) == STOP)
 955       n_panic(_("Cannot change back to current directory"));
 956    cwrelse(&cw);
 957
 958    setmsize(msgCount);
 959    if ((fm & FEDIT_NEWMAIL) && mb.mb_sorted && msgCount > omsgCount) {
 960       mb.mb_threaded = 0;
 961       c_sort((void*)-1);
 962    }
 963
 964    if (!(fm & FEDIT_NEWMAIL)) {
 965       n_pstate &= ~n_PS_SAW_COMMAND;
 966       n_pstate |= n_PS_SETFILE_OPENED;
 967    }
 968
 969    if ((n_poption & n_PO_EXISTONLY) && !(n_poption & n_PO_HEADERLIST)) {
 970       i = (msgCount == 0);
 971       goto jleave;
 972    }
 973
 974    if (!(fm & FEDIT_NEWMAIL) && (fm & FEDIT_SYSBOX) && msgCount == 0) {
 975       if (mb.mb_type == MB_MAILDIR /* XXX ?? */ && !ok_blook(emptystart))
 976          n_err(_("No mail at %s\n"), n_shexp_quote_cp(name, FAL0));
 977       i = 1;
 978       goto jleave;
 979    }
 980
 981    if ((fm & FEDIT_NEWMAIL) && msgCount > omsgCount)
 982       newmailinfo(omsgCount);
 983    i = 0;
 984 jleave:
 985    NYD_LEAVE;
 986    return i;
 987 }
 988
 989 FL bool_t
 990 maildir_quit(bool_t hold_sigs_on)
 991 {
 992    sighandler_type saveint;
 993    struct cw cw;
 994    bool_t rv;
 995    NYD_ENTER;
 996
 997    if(hold_sigs_on)
 998       rele_sigs();
 999
1000    rv = FAL0;
1001
1002    if (cwget(&cw) == STOP) {
1003       n_alert(_("Cannot open current directory"));
1004       goto jleave;
1005    }
1006
1007    saveint = safe_signal(SIGINT, SIG_IGN);
1008
1009    if (chdir(mailname) == -1) {
1010       n_err(_("Cannot change directory to %s\n"),
1011          n_shexp_quote_cp(mailname, FAL0));
1012       cwrelse(&cw);
1013       safe_signal(SIGINT, saveint);
1014       goto jleave;
1015    }
1016
1017    if (sigsetjmp(_maildir_jmp, 1) == 0) {
1018       if (saveint != SIG_IGN)
1019          safe_signal(SIGINT, &__maildircatch_hold);
1020       maildir_update();
1021    }
1022
1023    safe_signal(SIGINT, saveint);
1024
1025    if (cwret(&cw) == STOP)
1026       n_panic(_("Cannot change back to current directory"));
1027    cwrelse(&cw);
1028    rv = TRU1;
1029 jleave:
1030    if(hold_sigs_on)
1031       hold_sigs();
1032    NYD_LEAVE;
1033    return rv;
1034 }
1035
1036 FL enum okay
1037 maildir_append(char const *name, FILE *fp, long offset)
1038 {
1039    struct n_timespec const *tsp;
1040    char *buf, *bp, *lp;
1041    size_t bufsize, buflen, cnt;
1042    off_t off1 = -1, offs;
1043    long size;
1044    int flag;
1045    enum {_NONE = 0, _INHEAD = 1<<0, _NLSEP = 1<<1} state;
1046    enum okay rv;
1047    NYD_ENTER;
1048
1049    if ((rv = mkmaildir(name)) != OKAY)
1050       goto jleave;
1051
1052    buf = smalloc(bufsize = LINESIZE); /* TODO line pool; signals */
1053    buflen = 0;
1054    cnt = fsize(fp);
1055    offs = offset /* BSD will move due to O_APPEND! ftell(fp) */;
1056    size = 0;
1057    tsp = n_time_now(TRU1); /* TODO -> eventloop */
1058
1059    n_autorec_relax_create();
1060    for (flag = MNEW, state = _NLSEP;;) {
1061       bp = fgetline(&buf, &bufsize, &cnt, &buflen, fp, 1);
1062
1063       if (bp == NULL ||
1064             ((state & (_INHEAD | _NLSEP)) == _NLSEP &&
1065              is_head(buf, buflen, FAL0))) {
1066          if (off1 != (off_t)-1) {
1067             if ((rv = maildir_append1(tsp, name, fp, off1, size, flag)) == STOP)
1068                goto jfree;
1069             n_autorec_relax_unroll();
1070             if (fseek(fp, offs + buflen, SEEK_SET) == -1) {
1071                rv = STOP;
1072                goto jfree;
1073             }
1074          }
1075          off1 = offs + buflen;
1076          size = 0;
1077          state = _INHEAD;
1078          flag = MNEW;
1079
1080          if (bp == NULL)
1081             break;
1082       } else
1083          size += buflen;
1084       offs += buflen;
1085
1086       state &= ~_NLSEP;
1087       if (buf[0] == '\n') {
1088          state &= ~_INHEAD;
1089          state |= _NLSEP;
1090       } else if (state & _INHEAD) {
1091          if (!ascncasecmp(buf, "status", 6)) {
1092             lp = buf + 6;
1093             while (whitechar(*lp))
1094                ++lp;
1095             if (*lp == ':')
1096                while (*++lp != '\0')
1097                   switch (*lp) {
1098                   case 'R':
1099                      flag |= MREAD;
1100                      break;
1101                   case 'O':
1102                      flag &= ~MNEW;
1103                      break;
1104                   }
1105          } else if (!ascncasecmp(buf, "x-status", 8)) {
1106             lp = buf + 8;
1107             while (whitechar(*lp))
1108                ++lp;
1109             if (*lp == ':') {
1110                while (*++lp != '\0')
1111                   switch (*lp) {
1112                   case 'F':
1113                      flag |= MFLAGGED;
1114                      break;
1115                   case 'A':
1116                      flag |= MANSWERED;
1117                      break;
1118                   case 'T':
1119                      flag |= MDRAFTED;
1120                      break;
1121                   }
1122             }
1123          }
1124       }
1125    }
1126    assert(rv == OKAY);
1127 jfree:
1128    n_autorec_relax_gut();
1129    free(buf);
1130 jleave:
1131    NYD_LEAVE;
1132    return rv;
1133 }
1134
1135 FL enum okay
1136 maildir_remove(char const *name)
1137 {
1138    enum okay rv = STOP;
1139    NYD_ENTER;
1140
1141    if (subdir_remove(name, "tmp") == STOP ||
1142          subdir_remove(name, "new") == STOP ||
1143          subdir_remove(name, "cur") == STOP)
1144       goto jleave;
1145    if (rmdir(name) == -1) {
1146       n_perr(name, 0);
1147       goto jleave;
1148    }
1149    rv = OKAY;
1150 jleave:
1151    NYD_LEAVE;
1152    return rv;
1153 }
1154
1155 /* s-it-mode */