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

   1 /*
   2 ** show.c -- show/list messages
   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/mime.h>
  11 #include <h/utils.h>
  12
  13 static struct swit switches[] = {
  14 #define CHECKMIMESW  0
  15         { "checkmime", 0 },
  16 #define NOCHECKMIMESW  1
  17         { "nocheckmime", 0 },
  18 #define HEADSW  2
  19         { "header", 0 },
  20 #define NHEADSW  3
  21         { "noheader", 0 },
  22 #define FORMSW  4
  23         { "form formfile", 0 },
  24 #define PROGSW  5
  25         { "moreproc program", 0 },
  26 #define NPROGSW  6
  27         { "nomoreproc", 0 },
  28 #define LENSW  7
  29         { "length lines", 0 },
  30 #define WIDTHSW  8
  31         { "width columns", 0 },
  32 #define SHOWSW  9
  33         { "showproc program", 0 },
  34 #define SHOWMIMESW  10
  35         { "showmimeproc program", 0 },
  36 #define NSHOWSW  11
  37         { "noshowproc", 0 },
  38 #define FILESW  12
  39         { "file file", -4 },  /* interface from showfile */
  40 #define VERSIONSW  13
  41         { "version", 0 },
  42 #define HELPSW  14
  43         { "help", 0 },
  44         { NULL, 0 }
  45 };
  46
  47 /*
  48 ** static prototypes
  49 */
  50 static int is_nontext(char *);
  51
  52 /* prototype from mhlsbr.c */
  53 int mhl(int, char **);
  54
  55 #define SHOW  0
  56 #define NEXT  1
  57 #define PREV  2
  58
  59
  60 int
  61 main(int argc, char **argv)
  62 {
  63         int headersw = 1, msgp = 0;
  64         int nshow = 0, checkmime = 1, mime;
  65         int vecp = 1, procp = 1, mode = SHOW, msgnum;
  66         char *cp, *maildir, *file = NULL, *folder = NULL, *proc;
  67         char buf[BUFSIZ], **argp, **arguments;
  68         char *msgs[MAXARGS], *vec[MAXARGS];
  69         struct msgs *mp = NULL;
  70
  71 #ifdef LOCALE
  72         setlocale(LC_ALL, "");
  73 #endif
  74         invo_name = mhbasename(argv[0]);
  75
  76         /* read user profile/context */
  77         context_read();
  78
  79         if (!mh_strcasecmp(invo_name, "next")) {
  80                 mode = NEXT;
  81         } else if (!mh_strcasecmp(invo_name, "prev")) {
  82                 mode = PREV;
  83         }
  84         arguments = getarguments(invo_name, argc, argv, 1);
  85         argp = arguments;
  86
  87         while ((cp = *argp++)) {
  88                 if (*cp == '-') {
  89                         switch (smatch(++cp, switches)) {
  90                                 case AMBIGSW:
  91                                         ambigsw(cp, switches);
  92                                         done(1);
  93                                 case UNKWNSW:
  94                                 case NPROGSW:
  95                                         vec[vecp++] = --cp;
  96                                         continue;
  97
  98                                 case HELPSW:
  99                                         snprintf(buf, sizeof(buf), "%s [+folder] %s[switches] [switches for showproc]", invo_name, mode == SHOW ? "[msgs] ": "");
 100                                         print_help(buf, switches, 1);
 101                                         done(1);
 102                                 case VERSIONSW:
 103                                         print_version(invo_name);
 104                                         done(1);
 105
 106                                 case FILESW:
 107                                         if (mode != SHOW)
 108 usage:
 109                                                 adios(NULL, "usage: %s [+folder] [switches] [switches for showproc]", invo_name);
 110
 111                                         if (file)
 112                                                 adios(NULL, "only one file at a time!");
 113                                         if (!(cp = *argp++) || *cp == '-')
 114                                                 adios(NULL, "missing argument to %s", argp[-2]);
 115                                         file = getcpy(expanddir(cp));
 116                                         continue;
 117
 118                                 case HEADSW:
 119                                         headersw++;
 120                                         continue;
 121                                 case NHEADSW:
 122                                         headersw = 0;
 123                                         continue;
 124
 125                                 case FORMSW:
 126                                         vec[vecp++] = --cp;
 127                                         if (!(cp = *argp++) || *cp == '-')
 128                                                 adios(NULL, "missing argument to %s", argp[-2]);
 129                                         vec[vecp++] = getcpy(etcpath(cp));
 130                                         continue;
 131
 132                                 case PROGSW:
 133                                 case LENSW:
 134                                 case WIDTHSW:
 135                                         vec[vecp++] = --cp;
 136                                         if (!(cp = *argp++) || *cp == '-')
 137                                                 adios(NULL, "missing argument to %s", argp[-2]);
 138                                         vec[vecp++] = cp;
 139                                         continue;
 140
 141                                 case SHOWSW:
 142                                         if (!(showproc = *argp++) || *showproc == '-')
 143                                                 adios(NULL, "missing argument to %s", argp[-2]);
 144                                         nshow = 0;
 145                                         continue;
 146                                 case NSHOWSW:
 147                                         nshow++;
 148                                         continue;
 149
 150                                 case SHOWMIMESW:
 151                                         if (!(showmimeproc = *argp++) || *showmimeproc == '-')
 152                                                 adios(NULL, "missing argument to %s", argp[-2]);
 153                                         nshow = 0;
 154                                         continue;
 155                                 case CHECKMIMESW:
 156                                         checkmime++;
 157                                         continue;
 158                                 case NOCHECKMIMESW:
 159                                         checkmime = 0;
 160                                         continue;
 161                         }
 162                 }
 163                 if (*cp == '+' || *cp == '@') {
 164                         if (folder)
 165                                 adios(NULL, "only one folder at a time!");
 166                         else
 167                                 folder = getcpy(expandfol(cp));
 168                 } else if (mode != SHOW) {
 169                         goto usage;
 170                 } else {
 171                         msgs[msgp++] = cp;
 172                 }
 173         }
 174         procp = vecp;
 175
 176         if (file) {
 177                 if (msgp)
 178                         adios(NULL, "only one file at a time!");
 179                 vec[vecp++] = file;
 180                 goto go_to_it;
 181         }
 182
 183 #ifdef WHATNOW
 184         if (!msgp && !folder && mode == SHOW &&
 185                         (cp = getenv("mhdraft")) && *cp) {
 186                 vec[vecp++] = cp;
 187                 goto go_to_it;
 188         }
 189 #endif /* WHATNOW */
 190
 191         if (!msgp) {
 192                 switch (mode) {
 193                         case NEXT:
 194                                 msgs[msgp++] = "next";
 195                                 break;
 196                         case PREV:
 197                                 msgs[msgp++] = "prev";
 198                                 break;
 199                         default:
 200                                 msgs[msgp++] = "cur";
 201                                 break;
 202                 }
 203         }
 204
 205         if (!folder)
 206                 folder = getcurfol();
 207         maildir = toabsdir(folder);
 208
 209         if (chdir(maildir) == NOTOK)
 210                 adios(maildir, "unable to change directory to");
 211
 212         /* read folder and create message structure */
 213         if (!(mp = folder_read(folder)))
 214                 adios(NULL, "unable to read folder %s", folder);
 215
 216         /* check for empty folder */
 217         if (mp->nummsg == 0)
 218                 adios(NULL, "no messages in %s", folder);
 219
 220         /* parse all the message ranges/sequences and set SELECTED */
 221         for (msgnum = 0; msgnum < msgp; msgnum++)
 222                 if (!m_convert(mp, msgs[msgnum]))
 223                         done(1);
 224
 225         /*
 226         ** Set the SELECT_UNSEEN bit for all the SELECTED messages,
 227         ** since we will use that as a tag to know which messages
 228         ** to remove from the "unseen" sequence.
 229         */
 230         for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 231                 if (is_selected(mp, msgnum))
 232                         set_unseen(mp, msgnum);
 233
 234         seq_setprev(mp);  /* set the Previous-Sequence */
 235         seq_setunseen(mp, 1);  /* unset the Unseen-Sequence */
 236
 237         if (mp->numsel > MAXARGS - 2)
 238                 adios(NULL, "more than %d messages for show exec",
 239                                 MAXARGS - 2);
 240
 241         for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 242                 if (is_selected(mp, msgnum))
 243                         vec[vecp++] = getcpy(m_name(msgnum));
 244
 245         seq_setcur(mp, mp->hghsel);  /* update current message  */
 246         seq_save(mp);  /* synchronize sequences   */
 247         context_replace(pfolder, folder);  /* update current folder   */
 248         context_save();  /* save the context file   */
 249
 250         if (headersw && vecp == 2)
 251                 printf("(Message %s:%s)\n", folder, vec[1]);
 252
 253 go_to_it: ;
 254         fflush(stdout);
 255
 256         vec[vecp] = NULL;
 257
 258         /*
 259         ** Decide which "proc" to use
 260         */
 261         mime = 0;
 262         if (nshow) {
 263                 proc = catproc;
 264         } else {
 265                 /* check if any messages are non-text MIME messages */
 266                 if (checkmime && !getenv("NOMHNPROC")) {
 267                         if (!file) {
 268                                 /*
 269                                 ** loop through selected messages
 270                                 ** and check for MIME
 271                                 */
 272                                 for (msgnum = mp->lowsel;
 273                                                 msgnum <= mp->hghsel;
 274                                                 msgnum++)
 275                                         if (is_selected(mp, msgnum) && is_nontext(m_name(msgnum))) {
 276                                                 mime = 1;
 277                                                 break;
 278                                         }
 279                         } else {
 280                                 /* check the file for MIME */
 281                                 if (is_nontext(vec[vecp - 1]))
 282                                         mime = 1;
 283                         }
 284                 }
 285
 286                 /* Set the "proc" */
 287                 if (mime)
 288                         proc = showmimeproc;
 289                 else
 290                         proc = showproc;
 291         }
 292
 293         if (folder && !file)
 294                 m_putenv("mhfolder", folder);
 295
 296         /*
 297         ** For backward compatibility, if the "proc" is mhn,
 298         ** then add "-show" option.  Add "-file" if showing
 299         ** file.
 300         */
 301         if (strcmp(mhbasename(proc), "mhn") == 0) {
 302                 if (file) {
 303                         vec[vecp] = vec[vecp - 1];
 304                         vec[vecp - 1] = "-file";
 305                         vecp++;
 306                 }
 307                 vec[vecp++] = "-show";
 308                 vec[vecp] = NULL;
 309         }
 310
 311         /* If the "proc" is "mhshow", add "-file" if showing file.  */
 312         if (strcmp(mhbasename(proc), "mhshow") == 0 && file ) {
 313            vec[vecp] = vec[vecp - 1];
 314            vec[vecp - 1] = "-file";
 315            vec[++vecp] = NULL;
 316         }
 317
 318         /*
 319         ** If "proc" is mhl, then run it internally
 320         ** rather than exec'ing it.
 321         */
 322         if (strcmp(mhbasename(proc), "mhl") == 0) {
 323                 vec[0] = "mhl";
 324                 mhl(vecp, vec);
 325                 done(0);
 326         }
 327
 328         /*
 329         ** If you are not using a nmh command as your "proc", then
 330         ** add the path to the message names.  Currently, we are just
 331         ** checking for mhn here, since we've already taken care of mhl.
 332         */
 333         if (!strcmp(mhbasename(proc), "mhl")
 334                         && !file
 335                         && chdir(maildir =
 336                         concat(toabsdir("+"), "/", NULL)) != NOTOK) {
 337                 mp->foldpath = concat(mp->foldpath, "/", NULL);
 338                 cp = isprefix(maildir, mp->foldpath)
 339                         ? mp->foldpath + strlen(maildir)
 340                         : mp->foldpath;
 341                 for (msgnum = procp; msgnum < vecp; msgnum++)
 342                         vec[msgnum] = concat(cp, vec[msgnum], NULL);
 343         }
 344
 345         vec[0] = mhbasename(proc);
 346         execvp(proc, vec);
 347         adios(proc, "unable to exec");
 348         return 0;  /* dead code to satisfy the compiler */
 349 }
 350
 351 /*
 352 ** Check if a message or file contains any non-text parts
 353 */
 354 static int
 355 is_nontext(char *msgnam)
 356 {
 357         int result, state;
 358         unsigned char *bp, *dp;
 359         char *cp;
 360         char buf[BUFSIZ], name[NAMESZ];
 361         FILE *fp;
 362
 363         if ((fp = fopen(msgnam, "r")) == NULL)
 364                 return 0;
 365
 366         for (state = FLD;;) {
 367                 switch (state = m_getfld(state, name, buf, sizeof(buf), fp)) {
 368                 case FLD:
 369                 case FLDPLUS:
 370                 case FLDEOF:
 371                         /*
 372                         ** Check Content-Type field
 373                         */
 374                         if (!mh_strcasecmp(name, TYPE_FIELD)) {
 375                                 int passno;
 376                                 char c;
 377
 378                                 cp = getcpy(buf);
 379                                 while (state == FLDPLUS) {
 380                                         state = m_getfld(state, name, buf,
 381                                                         sizeof(buf), fp);
 382                                         cp = add(buf, cp);
 383                                 }
 384                                 bp = cp;
 385                                 passno = 1;
 386
 387 again:
 388                                 for (; isspace(*bp); bp++)
 389                                         continue;
 390                                 if (*bp == '(') {
 391                                         int i;
 392
 393                                         for (bp++, i = 0;;) {
 394                                                 switch (*bp++) {
 395                                                 case '\0':
 396 invalid:
 397                                                         result = 0;
 398                                                         goto out;
 399                                                 case '\\':
 400                                                         if (*bp++ == '\0')
 401                                                                 goto invalid;
 402                                                         continue;
 403                                                 case '(':
 404                                                         i++;
 405                                                         /* and fall... */
 406                                                 default:
 407                                                         continue;
 408                                                 case ')':
 409                                                         if (--i < 0)
 410                                                                 break;
 411                                                         continue;
 412                                                 }
 413                                                 break;
 414                                         }
 415                                 }
 416                                 if (passno == 2) {
 417                                         if (*bp != '/')
 418                                                 goto invalid;
 419                                         bp++;
 420                                         passno = 3;
 421                                         goto again;
 422                                 }
 423                                 for (dp = bp; istoken(*dp); dp++)
 424                                         continue;
 425                                 c = *dp;
 426                                 *dp = '\0';
 427                                 if (!*bp)
 428                                         goto invalid;
 429                                 if (passno > 1) {
 430                                         if ((result = (mh_strcasecmp(bp,
 431                                                         "plain") != 0)))
 432                                                 goto out;
 433                                         *dp = c;
 434                                         for (dp++; isspace(*dp); dp++)
 435                                                 continue;
 436                                         if (*dp) {
 437                                                 if ((result = !uprf(dp,
 438                                                                 "charset")))
 439                                                         goto out;
 440                                                 dp += sizeof("charset") - 1;
 441                                                 while (isspace(*dp))
 442                                                         dp++;
 443                                                 if (*dp++ != '=')
 444                                                         goto invalid;
 445                                                 while (isspace(*dp))
 446                                                         dp++;
 447                                                 if (*dp == '"') {
 448                                                         if ((bp = strchr(++dp, '"')))
 449                                                                 *bp = '\0';
 450                                                 } else {
 451                                                         for (bp = dp; *bp; bp++)
 452                                                                 if (!istoken(*bp)) {
 453                                                                         *bp = '\0';
 454                                                                         break;
 455                                                                 }
 456                                                 }
 457                                         } else {
 458                                                 /* Default character set */
 459                                                 dp = "US-ASCII";
 460                                         }
 461                                         /* Check the character set */
 462                                         result = !check_charset(dp, strlen(dp));
 463                                 } else {
 464                                         if (!(result = (mh_strcasecmp(bp, "text") != 0))) {
 465                                                 *dp = c;
 466                                                 bp = dp;
 467                                                 passno = 2;
 468                                                 goto again;
 469                                         }
 470                                 }
 471 out:
 472                                 free(cp);
 473                                 if (result) {
 474                                         fclose(fp);
 475                                         return result;
 476                                 }
 477                                 break;
 478                         }
 479
 480                         /*
 481                         ** Check Content-Transfer-Encoding field
 482                         */
 483                         if (!mh_strcasecmp(name, ENCODING_FIELD)) {
 484                                 cp = getcpy(buf);
 485                                 while (state == FLDPLUS) {
 486                                         state = m_getfld(state, name, buf,
 487                                                         sizeof(buf), fp);
 488                                         cp = add(buf, cp);
 489                                 }
 490                                 for (bp = cp; isspace(*bp); bp++)
 491                                         continue;
 492                                 for (dp = bp; istoken(*dp); dp++)
 493                                         continue;
 494                                 *dp = '\0';
 495                                 result = (mh_strcasecmp(bp, "7bit")
 496                                            && mh_strcasecmp(bp, "8bit")
 497                                            && mh_strcasecmp(bp, "binary"));
 498
 499                                 free(cp);
 500                                 if (result) {
 501                                         fclose(fp);
 502                                         return result;
 503                                 }
 504                                 break;
 505                         }
 506
 507                         /*
 508                         ** Just skip the rest of this header
 509                         ** field and go to next one.
 510                         */
 511                         while (state == FLDPLUS)
 512                                 state = m_getfld(state, name, buf, sizeof(buf),
 513                                                 fp);
 514                         break;
 515
 516                         /*
 517                         ** We've passed the message header,
 518                         ** so message is just text.
 519                         */
 520                 default:
 521                         fclose(fp);
 522                         return 0;
 523                 }
 524         }
 525 }