git.marmaro.de Git - mmh/blob - uip/sortm.c

   1 /*
   2 ** sortm.c -- sort messages in a folder by date/time
   3 **
   4 ** This code is Copyright (c) 2002, by the authors of nmh.  See the
   5 ** COPYRIGHT file in the root directory of the nmh distribution for
   6 ** complete copyright information.
   7 */
   8
   9 #include <h/mh.h>
  10 #include <h/tws.h>
  11 #include <h/utils.h>
  12
  13 static struct swit switches[] = {
  14 #define DATESW  0
  15          { "datefield field", 0 },
  16 #define TEXTSW  1
  17          { "textfield field", 0 },
  18 #define NSUBJSW  2
  19          { "notextfield", 2 },
  20 #define LIMSW  3
  21          { "limit days", 0 },
  22 #define NLIMSW  4
  23          { "nolimit", 2 },
  24 #define VERBSW  5
  25          { "verbose", 0 },
  26 #define NVERBSW  6
  27          { "noverbose", 2 },
  28 #define VERSIONSW  7
  29          { "Version", 0 },
  30 #define HELPSW  8
  31          { "help", 0 },
  32          { NULL, 0 }
  33 };
  34
  35 struct smsg {
  36         int s_msg;
  37         time_t s_clock;
  38         char *s_subj;
  39 };
  40
  41 static struct smsg *smsgs;
  42 int nmsgs;
  43
  44 char *subjsort = NULL;  /* sort on subject if != 0 */
  45 time_t datelimit = 0;
  46 int submajor = 0;  /* if true, sort on subject-major */
  47 int verbose;
  48
  49 /* This keeps compiler happy on calls to qsort */
  50 typedef int (*qsort_comp) (const void *, const void *);
  51
  52 /*
  53 ** static prototypes
  54 */
  55 static int read_hdrs(struct msgs *, char *);
  56 static int get_fields(char *, int, struct smsg *);
  57 static int dsort(struct smsg **, struct smsg **);
  58 static int subsort(struct smsg **, struct smsg **);
  59 static int txtsort(struct smsg **, struct smsg **);
  60 static void rename_chain(struct msgs *, struct smsg **, int, int);
  61 static void rename_msgs(struct msgs *, struct smsg **);
  62
  63
  64 int
  65 main(int argc, char **argv)
  66 {
  67         int i, msgnum;
  68         unsigned char *cp;
  69         char *maildir, *datesw = NULL;
  70         char *folder = NULL, buf[BUFSIZ], **argp;
  71         char **arguments;
  72         struct msgs_array msgs = { 0, 0, NULL };
  73         struct msgs *mp;
  74         struct smsg **dlist;
  75
  76 #ifdef LOCALE
  77         setlocale(LC_ALL, "");
  78 #endif
  79         invo_name = mhbasename(argv[0]);
  80
  81         /* read user profile/context */
  82         context_read();
  83
  84         arguments = getarguments(invo_name, argc, argv, 1);
  85         argp = arguments;
  86
  87         /*
  88         ** Parse arguments
  89         */
  90         while ((cp = *argp++)) {
  91                 if (*cp == '-') {
  92                         switch (smatch(++cp, switches)) {
  93                         case AMBIGSW:
  94                                 ambigsw(cp, switches);
  95                                 done(1);
  96                         case UNKWNSW:
  97                                 adios(NULL, "-%s unknown", cp);
  98
  99                         case HELPSW:
 100                                 snprintf(buf, sizeof(buf), "%s [+folder] [msgs] [switches]", invo_name);
 101                                 print_help(buf, switches, 1);
 102                                 done(1);
 103                         case VERSIONSW:
 104                                 print_version(invo_name);
 105                                 done(1);
 106
 107                         case DATESW:
 108                                 if (datesw)
 109                                         adios(NULL, "only one date field at a time");
 110                                 if (!(datesw = *argp++) || *datesw == '-')
 111                                         adios(NULL, "missing argument to %s",
 112                                                         argp[-2]);
 113                                 continue;
 114
 115                         case TEXTSW:
 116                                 if (subjsort)
 117                                         adios(NULL, "only one text field at a time");
 118                                 if (!(subjsort = *argp++) || *subjsort == '-')
 119                                         adios(NULL, "missing argument to %s",
 120                                                         argp[-2]);
 121                                 continue;
 122
 123                         case NSUBJSW:
 124                                 subjsort = NULL;
 125                                 continue;
 126
 127                         case LIMSW:
 128                                 if (!(cp = *argp++) || *cp == '-')
 129                                                 adios(NULL, "missing argument to %s", argp[-2]);
 130                                 while (*cp == '0')
 131                                         cp++;  /* skip any leading zeros */
 132                                 if (!*cp) {  /* hit end of string */
 133                                         submajor++;  /* sort subject-major */
 134                                         continue;
 135                                 }
 136                                 if (!isdigit(*cp) || !(datelimit = atoi(cp)))
 137                                         adios(NULL, "impossible limit %s", cp);
 138                                 datelimit *= 60*60*24;
 139                                 continue;
 140                         case NLIMSW:
 141                                 submajor = 0;  /* use date-major, but */
 142                                 datelimit = 0;  /* use no limit */
 143                                 continue;
 144
 145                         case VERBSW:
 146                                 verbose++;
 147                                 continue;
 148                         case NVERBSW:
 149                                 verbose = 0;
 150                                 continue;
 151                         }
 152                 }
 153                 if (*cp == '+' || *cp == '@') {
 154                         if (folder)
 155                                 adios(NULL, "only one folder at a time!");
 156                         else
 157                                 folder = getcpy(expandfol(cp));
 158                 } else
 159                         app_msgarg(&msgs, cp);
 160         }
 161
 162         if (!msgs.size)
 163                 app_msgarg(&msgs, seq_all);
 164         if (!datesw)
 165                 datesw = "date";
 166         if (!folder)
 167                 folder = getcurfol();
 168         maildir = toabsdir(folder);
 169
 170         if (chdir(maildir) == NOTOK)
 171                 adios(maildir, "unable to change directory to");
 172
 173         /* read folder and create message structure */
 174         if (!(mp = folder_read(folder)))
 175                 adios(NULL, "unable to read folder %s", folder);
 176
 177         /* check for empty folder */
 178         if (mp->nummsg == 0)
 179                 adios(NULL, "no messages in %s", folder);
 180
 181         /* parse all the message ranges/sequences and set SELECTED */
 182         for (msgnum = 0; msgnum < msgs.size; msgnum++)
 183                 if (!m_convert(mp, msgs.msgs[msgnum]))
 184                         done(1);
 185         seq_setprev(mp);  /* set the previous sequence */
 186
 187         if ((nmsgs = read_hdrs(mp, datesw)) <= 0)
 188                 adios(NULL, "no messages to sort");
 189
 190         /*
 191         ** sort a list of pointers to our "messages to be sorted".
 192         */
 193         dlist = (struct smsg **) mh_xmalloc((nmsgs+1) * sizeof(*dlist));
 194         for (i = 0; i < nmsgs; i++)
 195                 dlist[i] = &smsgs[i];
 196         dlist[nmsgs] = 0;
 197
 198         if (verbose) {  /* announce what we're doing */
 199                 if (subjsort)
 200                         printf("sorting by %s-major %s-minor\n",
 201                                 submajor ? subjsort : datesw,
 202                                 submajor ? datesw : subjsort);
 203                 else
 204                         printf("sorting by datefield %s\n", datesw);
 205         }
 206
 207         /* first sort by date, or by subject-major, date-minor */
 208         qsort((char *) dlist, nmsgs, sizeof(*dlist),
 209                         (qsort_comp) (submajor && subjsort ? txtsort : dsort));
 210
 211         /*
 212         ** if we're sorting on subject, we need another list
 213         ** in subject order, then a merge pass to collate the
 214         ** two sorts.
 215         */
 216         if (!submajor && subjsort) {  /* already date sorted */
 217                 struct smsg **slist, **flist;
 218                 register struct smsg ***il, **fp, **dp;
 219
 220                 slist = (struct smsg **)
 221                                 mh_xmalloc((nmsgs+1) * sizeof(*slist));
 222                 memcpy((char *)slist, (char *)dlist, (nmsgs+1)*sizeof(*slist));
 223                 qsort((char *)slist, nmsgs, sizeof(*slist),
 224                                 (qsort_comp) subsort);
 225
 226                 /*
 227                 ** make an inversion list so we can quickly find
 228                 ** the collection of messages with the same subj
 229                 ** given a message number.
 230                 */
 231                 il = (struct smsg ***) calloc(mp->hghsel+1, sizeof(*il));
 232                 if (! il)
 233                         adios(NULL, "couldn't allocate msg list");
 234                 for (i = 0; i < nmsgs; i++)
 235                         il[slist[i]->s_msg] = &slist[i];
 236                 /*
 237                 ** make up the final list, chronological but with
 238                 ** all the same subjects grouped together.
 239                 */
 240                 flist = (struct smsg **)
 241                                 mh_xmalloc((nmsgs+1) * sizeof(*flist));
 242                 fp = flist;
 243                 for (dp = dlist; *dp;) {
 244                         register struct smsg **s = il[(*dp++)->s_msg];
 245
 246                         /* see if we already did this guy */
 247                         if (! s)
 248                                 continue;
 249
 250                         *fp++ = *s++;
 251                         /*
 252                         ** take the next message(s) if there is one,
 253                         ** its subject isn't null and its subject
 254                         ** is the same as this one and it's not too
 255                         ** far away in time.
 256                         */
 257                         while (*s && (*s)->s_subj[0] && strcmp((*s)->s_subj, s[-1]->s_subj) == 0 && (datelimit == 0 || (*s)->s_clock - s[-1]->s_clock <= datelimit)) {
 258                                 il[(*s)->s_msg] = 0;
 259                                 *fp++ = *s++;
 260                         }
 261                 }
 262                 *fp = 0;
 263                 free(slist);
 264                 free(dlist);
 265                 dlist = flist;
 266         }
 267
 268         /*
 269         ** At this point, dlist is a sorted array of pointers to smsg
 270         ** structures, each of which contains a message number.
 271         */
 272
 273         rename_msgs(mp, dlist);
 274
 275         context_replace(curfolder, folder);  /* update current folder */
 276         seq_save(mp);  /* synchronize message sequences */
 277         context_save();  /* save the context file */
 278         folder_free(mp);  /* free folder/message structure */
 279         done(0);
 280         return 1;
 281 }
 282
 283 static int
 284 read_hdrs(struct msgs *mp, char *datesw)
 285 {
 286         int msgnum;
 287         struct tws tb;
 288         register struct smsg *s;
 289
 290         twscopy(&tb, dlocaltimenow());
 291
 292         smsgs = (struct smsg *) calloc((size_t) (mp->hghsel - mp->lowsel + 2),
 293                         sizeof(*smsgs));
 294         if (smsgs == NULL)
 295                 adios(NULL, "unable to allocate sort storage");
 296
 297         s = smsgs;
 298         for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
 299                 if (is_selected(mp, msgnum)) {
 300                         if (get_fields(datesw, msgnum, s)) {
 301                                 s->s_msg = msgnum;
 302                                 s++;
 303                         }
 304                 }
 305         }
 306         s->s_msg = 0;
 307         return(s - smsgs);
 308 }
 309
 310
 311 /*
 312 ** Parse the message and get the data or subject field,
 313 ** if needed.
 314 */
 315
 316 static int
 317 get_fields(char *datesw, int msg, struct smsg *smsg)
 318 {
 319         register int state;
 320         int compnum;
 321         char *msgnam, buf[BUFSIZ], nam[NAMESZ];
 322         register struct tws *tw;
 323         register char *datecomp = NULL, *subjcomp = NULL;
 324         register FILE *in;
 325
 326         if ((in = fopen(msgnam = m_name(msg), "r")) == NULL) {
 327                 admonish(msgnam, "unable to read message");
 328                 return (0);
 329         }
 330         for (compnum = 1, state = FLD;;) {
 331                 switch (state = m_getfld(state, nam, buf, sizeof(buf), in)) {
 332                 case FLD:
 333                 case FLDEOF:
 334                 case FLDPLUS:
 335                         compnum++;
 336                         if (!mh_strcasecmp(nam, datesw)) {
 337                                 datecomp = add(buf, datecomp);
 338                                 while (state == FLDPLUS) {
 339                                         state = m_getfld(state, nam, buf,
 340                                                         sizeof(buf), in);
 341                                         datecomp = add(buf, datecomp);
 342                                 }
 343                                 if (!subjsort || subjcomp)
 344                                         break;
 345                         } else if (subjsort && !mh_strcasecmp(nam, subjsort)) {
 346                                 subjcomp = add(buf, subjcomp);
 347                                 while (state == FLDPLUS) {
 348                                         state = m_getfld(state, nam, buf,
 349                                                         sizeof(buf), in);
 350                                         subjcomp = add(buf, subjcomp);
 351                                 }
 352                                 if (datecomp)
 353                                         break;
 354                         } else {
 355                                 /* just flush this guy */
 356                                 while (state == FLDPLUS)
 357                                         state = m_getfld(state, nam, buf,
 358                                                         sizeof(buf), in);
 359                         }
 360                         continue;
 361
 362                 case BODY:
 363                 case BODYEOF:
 364                 case FILEEOF:
 365                         break;
 366
 367                 case LENERR:
 368                 case FMTERR:
 369                         if (state == LENERR || state == FMTERR)
 370                                 admonish(NULL, "format error in message %d (header #%d)", msg, compnum);
 371                         if (datecomp)
 372                                 free(datecomp);
 373                         if (subjcomp)
 374                                 free(subjcomp);
 375                         fclose(in);
 376                         return (0);
 377
 378                 default:
 379                         adios(NULL, "internal error -- you lose");
 380                 }
 381                 break;
 382         }
 383
 384         /*
 385         ** If no date component, then use the modification
 386         ** time of the file as its date
 387         */
 388         if (!datecomp || (tw = dparsetime(datecomp)) == NULL) {
 389                 struct stat st;
 390
 391                 admonish(NULL, "can't parse %s field in message %d",
 392                                 datesw, msg);
 393                 fstat(fileno(in), &st);
 394                 smsg->s_clock = st.st_mtime;
 395         } else {
 396                 smsg->s_clock = dmktime(tw);
 397         }
 398
 399         if (subjsort) {
 400                 if (subjcomp) {
 401                         /*
 402                         ** try to make the subject "canonical": delete
 403                         ** leading "re:", everything but letters & smash
 404                         ** letters to lower case.
 405                         */
 406                         register char  *cp, *cp2;
 407                         register unsigned char c;
 408
 409                         cp = subjcomp;
 410                         cp2 = subjcomp;
 411                         if (strcmp(subjsort, "subject") == 0) {
 412                                 while ((c = *cp)) {
 413                                         if (! isspace(c)) {
 414                                                 if(uprf(cp, "re:"))
 415                                                         cp += 2;
 416                                                 else
 417                                                         break;
 418                                         }
 419                                         cp++;
 420                                 }
 421                         }
 422
 423                         while ((c = *cp++)) {
 424                                 if (isalnum(c))
 425                                         *cp2++ = isupper(c) ? tolower(c) : c;
 426                         }
 427
 428                         *cp2 = '\0';
 429                 } else
 430                         subjcomp = "";
 431
 432                 smsg->s_subj = subjcomp;
 433         }
 434         fclose(in);
 435         if (datecomp)
 436                 free(datecomp);
 437
 438         return (1);
 439 }
 440
 441 /*
 442 ** sort on dates.
 443 */
 444 static int
 445 dsort(struct smsg **a, struct smsg **b)
 446 {
 447         if ((*a)->s_clock < (*b)->s_clock)
 448                 return (-1);
 449         else if ((*a)->s_clock > (*b)->s_clock)
 450                 return (1);
 451         else if ((*a)->s_msg < (*b)->s_msg)
 452                 return (-1);
 453         else
 454                 return (1);
 455 }
 456
 457 /*
 458 ** sort on subjects.
 459 */
 460 static int
 461 subsort(struct smsg **a, struct smsg **b)
 462 {
 463         register int i;
 464
 465         if ((i = strcmp((*a)->s_subj, (*b)->s_subj)))
 466                 return (i);
 467
 468         return (dsort(a, b));
 469 }
 470
 471 static int
 472 txtsort(struct smsg **a, struct smsg **b)
 473 {
 474         register int i;
 475
 476         if ((i = strcmp((*a)->s_subj, (*b)->s_subj)))
 477                 return (i);
 478         else if ((*a)->s_msg < (*b)->s_msg)
 479                 return (-1);
 480         else
 481                 return (1);
 482 }
 483
 484 static void
 485 rename_chain(struct msgs *mp, struct smsg **mlist, int msg, int endmsg)
 486 {
 487         int nxt, old, new;
 488         char *newname, oldname[BUFSIZ];
 489         char newbuf[MAXPATHLEN + 1];
 490
 491         for (;;) {
 492                 nxt = mlist[msg] - smsgs;  /* mlist[msg] is a ptr into smsgs */
 493                 mlist[msg] = (struct smsg *)0;
 494                 old = smsgs[nxt].s_msg;
 495                 new = smsgs[msg].s_msg;
 496                 strncpy(oldname, m_name(old), sizeof(oldname));
 497                 newname = m_name(new);
 498                 if (verbose)
 499                         printf("message %d becomes message %d\n", old, new);
 500
 501                 snprintf(oldname, sizeof (oldname), "%s/%d",
 502                                 mp->foldpath, old);
 503                 snprintf(newbuf, sizeof (newbuf), "%s/%d", mp->foldpath, new);
 504                 ext_hook("ref-hook", oldname, newbuf);
 505
 506                 if (rename(oldname, newname) == NOTOK)
 507                         adios(newname, "unable to rename %s to", oldname);
 508
 509                 copy_msg_flags(mp, new, old);
 510                 if (mp->curmsg == old)
 511                         seq_setcur(mp, new);
 512
 513                 if (nxt == endmsg)
 514                         break;
 515
 516                 msg = nxt;
 517         }
 518 /* if (nxt != endmsg); */
 519 /* rename_chain(mp, mlist, nxt, endmsg); */
 520 }
 521
 522 static void
 523 rename_msgs(struct msgs *mp, struct smsg **mlist)
 524 {
 525         int i, j, old, new;
 526         seqset_t tmpset;
 527         char f1[BUFSIZ], tmpfil[BUFSIZ];
 528         char newbuf[MAXPATHLEN + 1];
 529         struct smsg *sp;
 530
 531         strncpy(tmpfil, m_name(mp->hghmsg + 1), sizeof(tmpfil));
 532
 533         for (i = 0; i < nmsgs; i++) {
 534                 if (! (sp = mlist[i]))
 535                         continue;   /* did this one */
 536
 537                 j = sp - smsgs;
 538                 if (j == i)
 539                         continue;   /* this one doesn't move */
 540
 541                 /*
 542                 ** the guy that was msg j is about to become msg i.
 543                 ** rename 'j' to make a hole, then recursively rename
 544                 ** guys to fill up the hole.
 545                 */
 546                 old = smsgs[j].s_msg;
 547                 new = smsgs[i].s_msg;
 548                 strncpy(f1, m_name(old), sizeof(f1));
 549
 550                 if (verbose)
 551                         printf("renaming message chain from %d to %d\n",
 552                                         old, new);
 553
 554                 /*
 555                 ** Run the external hook to refile the old message as the
 556                 ** temporary message number that is off of the end of the
 557                 ** messages in the folder.
 558                 */
 559
 560                 snprintf(f1, sizeof (f1), "%s/%d", mp->foldpath, old);
 561                 snprintf(newbuf, sizeof (newbuf), "%s/%d",
 562                                 mp->foldpath, mp->hghmsg + 1);
 563                 ext_hook("ref-hook", f1, newbuf);
 564
 565                 if (rename(f1, tmpfil) == NOTOK)
 566                         adios(tmpfil, "unable to rename %s to ", f1);
 567
 568                 get_msg_flags(mp, &tmpset, old);
 569
 570                 rename_chain(mp, mlist, j, i);
 571
 572                 /*
 573                 ** Run the external hook to refile the temorary message number
 574                 ** to the real place.
 575                 */
 576
 577                 snprintf(f1, sizeof (f1), "%s/%d", mp->foldpath, new);
 578                 ext_hook("ref-hook", newbuf, f1);
 579
 580                 if (rename(tmpfil, m_name(new)) == NOTOK)
 581                         adios(m_name(new), "unable to rename %s to", tmpfil);
 582
 583                 set_msg_flags(mp, &tmpset, new);
 584                 mp->msgflags |= SEQMOD;
 585         }
 586 }