diplodocus.org Git - nmh/blob - uip/show.c

   1
   2 /*
   3  * show.c -- show/list messages
   4  *
   5  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   6  * COPYRIGHT file in the root directory of the nmh distribution for
   7  * complete copyright information.
   8  */
   9
  10 #include <h/mh.h>
  11 #include <h/mime.h>
  12 #include <h/utils.h>
  13
  14 static struct swit switches[] = {
  15 #define CHECKMIMESW          0
  16     { "checkmime", 0 },
  17 #define NOCHECKMIMESW        1
  18     { "nocheckmime", 0 },
  19 #define HEADSW               2
  20     { "header", 0 },
  21 #define NHEADSW              3
  22     { "noheader", 0 },
  23 #define FORMSW               4
  24     { "form formfile", 0 },
  25 #define PROGSW               5
  26     { "moreproc program", 0 },
  27 #define NPROGSW              6
  28     { "nomoreproc", 0 },
  29 #define LENSW                7
  30     { "length lines", 0 },
  31 #define WIDTHSW              8
  32     { "width columns", 0 },
  33 #define SHOWSW               9
  34     { "showproc program", 0 },
  35 #define SHOWMIMESW          10
  36     { "showmimeproc program", 0 },
  37 #define NSHOWSW             11
  38     { "noshowproc", 0 },
  39 #define DRFTSW              12
  40     { "draft", 0 },
  41 #define FILESW              13
  42     { "file file", -4 },                /* interface from showfile */
  43 #define VERSIONSW           14
  44     { "version", 0 },
  45 #define HELPSW              15
  46     { "help", 0 },
  47     { NULL, 0 }
  48 };
  49
  50 /*
  51  * static prototypes
  52  */
  53 static int is_nontext(char *);
  54
  55 /* prototype from mhlsbr.c */
  56 int mhl (int, char **);
  57
  58 #define SHOW  0
  59 #define NEXT  1
  60 #define PREV  2
  61
  62
  63 int
  64 main (int argc, char **argv)
  65 {
  66     int draftsw = 0, headersw = 1, msgp = 0;
  67     int nshow = 0, checkmime = 1, mime;
  68     int vecp = 1, procp = 1, isdf = 0, mode = SHOW, msgnum;
  69     char *cp, *maildir, *file = NULL, *folder = NULL, *proc;
  70     char buf[BUFSIZ], **argp, **arguments;
  71     char *msgs[MAXARGS], *vec[MAXARGS];
  72     struct msgs *mp = NULL;
  73
  74 #ifdef LOCALE
  75     setlocale(LC_ALL, "");
  76 #endif
  77     invo_name = r1bindex (argv[0], '/');
  78
  79     /* read user profile/context */
  80     context_read();
  81
  82     if (!mh_strcasecmp (invo_name, "next")) {
  83         mode = NEXT;
  84     } else if (!mh_strcasecmp (invo_name, "prev")) {
  85         mode = PREV;
  86     }
  87     arguments = getarguments (invo_name, argc, argv, 1);
  88     argp = 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                 case NPROGSW:
  98                     vec[vecp++] = --cp;
  99                     continue;
 100
 101                 case HELPSW:
 102                     snprintf (buf, sizeof(buf),
 103                         "%s [+folder] %s[switches] [switches for showproc]",
 104                         invo_name, mode == SHOW ? "[msgs] ": "");
 105                     print_help (buf, switches, 1);
 106                     done (1);
 107                 case VERSIONSW:
 108                     print_version(invo_name);
 109                     done (1);
 110
 111                 case DRFTSW:
 112                     if (file)
 113                         adios (NULL, "only one file at a time!");
 114                     draftsw++;
 115                     if (mode == SHOW)
 116                         continue;
 117 usage:
 118                     adios (NULL,
 119                             "usage: %s [+folder] [switches] [switches for showproc]",
 120                             invo_name);
 121                 case FILESW:
 122                     if (mode != SHOW)
 123                         goto usage;
 124                     if (draftsw || file)
 125                         adios (NULL, "only one file at a time!");
 126                     if (!(cp = *argp++) || *cp == '-')
 127                         adios (NULL, "missing argument to %s", argp[-2]);
 128                     file = path (cp, TFILE);
 129                     continue;
 130
 131                 case HEADSW:
 132                     headersw++;
 133                     continue;
 134                 case NHEADSW:
 135                     headersw = 0;
 136                     continue;
 137
 138                 case FORMSW:
 139                     vec[vecp++] = --cp;
 140                     if (!(cp = *argp++) || *cp == '-')
 141                         adios (NULL, "missing argument to %s", argp[-2]);
 142                     vec[vecp++] = getcpy (etcpath(cp));
 143                     continue;
 144
 145                 case PROGSW:
 146                 case LENSW:
 147                 case WIDTHSW:
 148                     vec[vecp++] = --cp;
 149                     if (!(cp = *argp++) || *cp == '-')
 150                         adios (NULL, "missing argument to %s", argp[-2]);
 151                     vec[vecp++] = cp;
 152                     continue;
 153
 154                 case SHOWSW:
 155                     if (!(showproc = *argp++) || *showproc == '-')
 156                         adios (NULL, "missing argument to %s", argp[-2]);
 157                     nshow = 0;
 158                     continue;
 159                 case NSHOWSW:
 160                     nshow++;
 161                     continue;
 162
 163                 case SHOWMIMESW:
 164                     if (!(showmimeproc = *argp++) || *showmimeproc == '-')
 165                         adios (NULL, "missing argument to %s", argp[-2]);
 166                     nshow = 0;
 167                     continue;
 168                 case CHECKMIMESW:
 169                     checkmime++;
 170                     continue;
 171                 case NOCHECKMIMESW:
 172                     checkmime = 0;
 173                     continue;
 174             }
 175         }
 176         if (*cp == '+' || *cp == '@') {
 177             if (folder)
 178                 adios (NULL, "only one folder at a time!");
 179             else
 180                 folder = pluspath (cp);
 181         } else {
 182             if (mode != SHOW)
 183                 goto usage;
 184             else
 185                 msgs[msgp++] = cp;
 186         }
 187     }
 188     procp = vecp;
 189
 190     if (!context_find ("path"))
 191         free (path ("./", TFOLDER));
 192
 193     if (draftsw || file) {
 194         if (msgp)
 195             adios (NULL, "only one file at a time!");
 196         vec[vecp++] = draftsw
 197             ? getcpy (m_draft (folder, msgp ? msgs[0] : NULL, 1, &isdf))
 198             : file;
 199         goto go_to_it;
 200     }
 201
 202 #ifdef WHATNOW
 203     if (!msgp && !folder && mode == SHOW && (cp = getenv ("mhdraft")) && *cp) {
 204         draftsw++;
 205         vec[vecp++] = cp;
 206         goto go_to_it;
 207     }
 208 #endif /* WHATNOW */
 209
 210     if (!msgp) {
 211         switch (mode) {
 212             case NEXT:
 213                 msgs[msgp++] = "next";
 214                 break;
 215             case PREV:
 216                 msgs[msgp++] = "prev";
 217                 break;
 218             default:
 219                 msgs[msgp++] = "cur";
 220                 break;
 221         }
 222     }
 223
 224     if (!folder)
 225         folder = getfolder (1);
 226     maildir = m_maildir (folder);
 227
 228     if (chdir (maildir) == NOTOK)
 229         adios (maildir, "unable to change directory to");
 230
 231     /* read folder and create message structure */
 232     if (!(mp = folder_read (folder)))
 233         adios (NULL, "unable to read folder %s", folder);
 234
 235     /* check for empty folder */
 236     if (mp->nummsg == 0)
 237         adios (NULL, "no messages in %s", folder);
 238
 239     /* parse all the message ranges/sequences and set SELECTED */
 240     for (msgnum = 0; msgnum < msgp; msgnum++)
 241         if (!m_convert (mp, msgs[msgnum]))
 242             done (1);
 243
 244     /*
 245      * Set the SELECT_UNSEEN bit for all the SELECTED messages,
 246      * since we will use that as a tag to know which messages
 247      * to remove from the "unseen" sequence.
 248      */
 249     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 250         if (is_selected(mp, msgnum))
 251             set_unseen (mp, msgnum);
 252
 253     seq_setprev (mp);           /* set the Previous-Sequence */
 254     seq_setunseen (mp, 1);      /* unset the Unseen-Sequence */
 255
 256     if (mp->numsel > MAXARGS - 2)
 257         adios (NULL, "more than %d messages for show exec", MAXARGS - 2);
 258
 259     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 260         if (is_selected(mp, msgnum))
 261             vec[vecp++] = getcpy (m_name (msgnum));
 262
 263     seq_setcur (mp, mp->hghsel);        /* update current message  */
 264     seq_save (mp);                      /* synchronize sequences   */
 265     context_replace (pfolder, folder);  /* update current folder   */
 266     context_save ();                    /* save the context file   */
 267
 268     if (headersw && vecp == 2)
 269         printf ("(Message %s:%s)\n", folder, vec[1]);
 270
 271 go_to_it: ;
 272     fflush (stdout);
 273
 274     vec[vecp] = NULL;
 275
 276     /*
 277      * Decide which "proc" to use
 278      */
 279     mime = 0;
 280     if (nshow) {
 281         proc = catproc;
 282     } else {
 283         /* check if any messages are non-text MIME messages */
 284         if (checkmime && !getenv ("NOMHNPROC")) {
 285             if (!draftsw && !file) {
 286                 /* loop through selected messages and check for MIME */
 287                 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 288                     if (is_selected (mp, msgnum) && is_nontext (m_name (msgnum))) {
 289                         mime = 1;
 290                         break;
 291                     }
 292             } else {
 293                 /* check the file or draft for MIME */
 294                 if (is_nontext (vec[vecp - 1]))
 295                     mime = 1;
 296             }
 297         }
 298
 299         /* Set the "proc" */
 300         if (mime)
 301             proc = showmimeproc;
 302         else
 303             proc = showproc;
 304     }
 305
 306     if (folder && !draftsw && !file)
 307         m_putenv ("mhfolder", folder);
 308
 309     /*
 310      * For backward compatibility, if the "proc" is mhn,
 311      * then add "-show" option.  Add "-file" if showing
 312      * file or draft.
 313      */
 314     if (strcmp (r1bindex (proc, '/'), "mhn") == 0) {
 315         if (draftsw || file) {
 316             vec[vecp] = vec[vecp - 1];
 317             vec[vecp - 1] = "-file";
 318             vecp++;
 319         }
 320         vec[vecp++] = "-show";
 321         vec[vecp] = NULL;
 322     }
 323
 324     /* If the "proc" is "mhshow", add "-file" if showing file or draft.
 325      */
 326     if (strcmp (r1bindex (proc, '/'), "mhshow") == 0 && (draftsw || file) ) {
 327        vec[vecp] = vec[vecp - 1];
 328        vec[vecp - 1] = "-file";
 329        vec[++vecp] = NULL;
 330     }
 331
 332     /*
 333      * If "proc" is mhl, then run it internally
 334      * rather than exec'ing it.
 335      */
 336     if (strcmp (r1bindex (proc, '/'), "mhl") == 0) {
 337         vec[0] = "mhl";
 338         mhl (vecp, vec);
 339         done (0);
 340     }
 341
 342     /*
 343      * If you are not using a nmh command as your "proc", then
 344      * add the path to the message names.  Currently, we are just
 345      * checking for mhn here, since we've already taken care of mhl.
 346      */
 347     if (!strcmp (r1bindex (proc, '/'), "mhl")
 348             && !draftsw
 349             && !file
 350             && chdir (maildir = concat (m_maildir (""), "/", NULL)) != NOTOK) {
 351         mp->foldpath = concat (mp->foldpath, "/", NULL);
 352         cp = ssequal (maildir, mp->foldpath)
 353             ? mp->foldpath + strlen (maildir)
 354             : mp->foldpath;
 355         for (msgnum = procp; msgnum < vecp; msgnum++)
 356             vec[msgnum] = concat (cp, vec[msgnum], NULL);
 357     }
 358
 359     vec[0] = r1bindex (proc, '/');
 360     execvp (proc, vec);
 361     adios (proc, "unable to exec");
 362     return 0;  /* dead code to satisfy the compiler */
 363 }
 364
 365 /*
 366  * Cheat:  we are loaded with adrparse, which wants a routine called
 367  * OfficialName().  We call adrparse:getm() with the correct arguments
 368  * to prevent OfficialName() from being called.  Hence, the following
 369  * is to keep the loader happy.
 370  */
 371
 372 char *
 373 OfficialName (char *name)
 374 {
 375     return name;
 376 }
 377
 378
 379 /*
 380  * Check if a message or file contains any non-text parts
 381  */
 382 static int
 383 is_nontext (char *msgnam)
 384 {
 385     int result, state;
 386     unsigned char *bp, *dp;
 387     char *cp;
 388     char buf[BUFSIZ], name[NAMESZ];
 389     FILE *fp;
 390
 391     if ((fp = fopen (msgnam, "r")) == NULL)
 392         return 0;
 393
 394     for (state = FLD;;) {
 395         switch (state = m_getfld (state, name, buf, sizeof(buf), fp)) {
 396         case FLD:
 397         case FLDPLUS:
 398         case FLDEOF:
 399             /*
 400              * Check Content-Type field
 401              */
 402             if (!mh_strcasecmp (name, TYPE_FIELD)) {
 403                 int passno;
 404                 char c;
 405
 406                 cp = add (buf, NULL);
 407                 while (state == FLDPLUS) {
 408                     state = m_getfld (state, name, buf, sizeof(buf), fp);
 409                     cp = add (buf, cp);
 410                 }
 411                 bp = cp;
 412                 passno = 1;
 413
 414 again:
 415                 for (; isspace (*bp); bp++)
 416                     continue;
 417                 if (*bp == '(') {
 418                     int i;
 419
 420                     for (bp++, i = 0;;) {
 421                         switch (*bp++) {
 422                         case '\0':
 423 invalid:
 424                             result = 0;
 425                             goto out;
 426                         case '\\':
 427                             if (*bp++ == '\0')
 428                                 goto invalid;
 429                             continue;
 430                         case '(':
 431                             i++;
 432                             /* and fall... */
 433                         default:
 434                             continue;
 435                         case ')':
 436                             if (--i < 0)
 437                                 break;
 438                             continue;
 439                         }
 440                         break;
 441                     }
 442                 }
 443                 if (passno == 2) {
 444                     if (*bp != '/')
 445                         goto invalid;
 446                     bp++;
 447                     passno = 3;
 448                     goto again;
 449                 }
 450                 for (dp = bp; istoken (*dp); dp++)
 451                     continue;
 452                 c = *dp;
 453                 *dp = '\0';
 454                 if (!*bp)
 455                     goto invalid;
 456                 if (passno > 1) {
 457                     if ((result = (mh_strcasecmp (bp, "plain") != 0)))
 458                         goto out;
 459                     *dp = c;
 460                     for (dp++; isspace (*dp); dp++)
 461                         continue;
 462                     if (*dp) {
 463                         if ((result = !uprf (dp, "charset")))
 464                             goto out;
 465                         dp += sizeof("charset") - 1;
 466                         while (isspace (*dp))
 467                             dp++;
 468                         if (*dp++ != '=')
 469                             goto invalid;
 470                         while (isspace (*dp))
 471                             dp++;
 472                         if (*dp == '"') {
 473                             if ((bp = strchr(++dp, '"')))
 474                                 *bp = '\0';
 475                         } else {
 476                             for (bp = dp; *bp; bp++)
 477                                 if (!istoken (*bp)) {
 478                                     *bp = '\0';
 479                                     break;
 480                                 }
 481                         }
 482                     } else {
 483                         /* Default character set */
 484                         dp = "US-ASCII";
 485                     }
 486                     /* Check the character set */
 487                     result = !check_charset (dp, strlen (dp));
 488                 } else {
 489                     if (!(result = (mh_strcasecmp (bp, "text") != 0))) {
 490                         *dp = c;
 491                         bp = dp;
 492                         passno = 2;
 493                         goto again;
 494                     }
 495                 }
 496 out:
 497                 free (cp);
 498                 if (result) {
 499                     fclose (fp);
 500                     return result;
 501                 }
 502                 break;
 503             }
 504
 505             /*
 506              * Check Content-Transfer-Encoding field
 507              */
 508             if (!mh_strcasecmp (name, ENCODING_FIELD)) {
 509                 cp = add (buf, NULL);
 510                 while (state == FLDPLUS) {
 511                     state = m_getfld (state, name, buf, sizeof(buf), fp);
 512                     cp = add (buf, cp);
 513                 }
 514                 for (bp = cp; isspace (*bp); bp++)
 515                     continue;
 516                 for (dp = bp; istoken (*dp); dp++)
 517                     continue;
 518                 *dp = '\0';
 519                 result = (mh_strcasecmp (bp, "7bit")
 520                        && mh_strcasecmp (bp, "8bit")
 521                        && mh_strcasecmp (bp, "binary"));
 522
 523                 free (cp);
 524                 if (result) {
 525                     fclose (fp);
 526                     return result;
 527                 }
 528                 break;
 529             }
 530
 531             /*
 532              * Just skip the rest of this header
 533              * field and go to next one.
 534              */
 535             while (state == FLDPLUS)
 536                 state = m_getfld (state, name, buf, sizeof(buf), fp);
 537             break;
 538
 539             /*
 540              * We've passed the message header,
 541              * so message is just text.
 542              */
 543         default:
 544             fclose (fp);
 545             return 0;
 546         }
 547     }
 548 }