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 FMTPROCSW           14
  44     { "fmtproc program", 0 },
  45 #define NFMTPROCSW          15
  46     { "nofmtproc", 0 },
  47 #define VERSIONSW           16
  48     { "version", 0 },
  49 #define HELPSW              17
  50     { "help", 0 },
  51     { NULL, 0 }
  52 };
  53
  54 /*
  55  * static prototypes
  56  */
  57 static int is_nontext(char *);
  58
  59 #define SHOW  0
  60 #define NEXT  1
  61 #define PREV  2
  62
  63
  64 int
  65 main (int argc, char **argv)
  66 {
  67     int draftsw = 0, headersw = 1, msgp = 0;
  68     int nshow = 0, checkmime = 1, mime;
  69     int vecp = 1, procp = 1, isdf = 0, mode = SHOW, msgnum;
  70     char *cp, *maildir, *file = NULL, *folder = NULL, *proc;
  71     char buf[BUFSIZ], **argp, **arguments;
  72     char *msgs[MAXARGS], *vec[MAXARGS];
  73     struct msgs *mp = NULL;
  74
  75 #ifdef LOCALE
  76     setlocale(LC_ALL, "");
  77 #endif
  78     invo_name = r1bindex (argv[0], '/');
  79
  80     /* read user profile/context */
  81     context_read();
  82
  83     if (!mh_strcasecmp (invo_name, "next")) {
  84         mode = NEXT;
  85     } else if (!mh_strcasecmp (invo_name, "prev")) {
  86         mode = PREV;
  87     }
  88     arguments = getarguments (invo_name, argc, argv, 1);
  89     argp = arguments;
  90
  91     while ((cp = *argp++)) {
  92         if (*cp == '-') {
  93             switch (smatch (++cp, switches)) {
  94                 case AMBIGSW:
  95                     ambigsw (cp, switches);
  96                     done (1);
  97                 case UNKWNSW:
  98                 case NPROGSW:
  99                 case NFMTPROCSW:
 100                     vec[vecp++] = --cp;
 101                     continue;
 102
 103                 case HELPSW:
 104                     snprintf (buf, sizeof(buf),
 105                         "%s [+folder] %s[switches] [switches for showproc]",
 106                         invo_name, mode == SHOW ? "[msgs] ": "");
 107                     print_help (buf, switches, 1);
 108                     done (1);
 109                 case VERSIONSW:
 110                     print_version(invo_name);
 111                     done (1);
 112
 113                 case DRFTSW:
 114                     if (file)
 115                         adios (NULL, "only one file at a time!");
 116                     draftsw++;
 117                     if (mode == SHOW)
 118                         continue;
 119 usage:
 120                     adios (NULL,
 121                             "usage: %s [+folder] [switches] [switches for showproc]",
 122                             invo_name);
 123                 case FILESW:
 124                     if (mode != SHOW)
 125                         goto usage;
 126                     if (draftsw || file)
 127                         adios (NULL, "only one file at a time!");
 128                     if (!(cp = *argp++) || *cp == '-')
 129                         adios (NULL, "missing argument to %s", argp[-2]);
 130                     file = path (cp, TFILE);
 131                     continue;
 132
 133                 case HEADSW:
 134                     headersw++;
 135                     continue;
 136                 case NHEADSW:
 137                     headersw = 0;
 138                     continue;
 139
 140                 case FORMSW:
 141                     vec[vecp++] = --cp;
 142                     if (!(cp = *argp++) || *cp == '-')
 143                         adios (NULL, "missing argument to %s", argp[-2]);
 144                     vec[vecp++] = getcpy (etcpath(cp));
 145                     continue;
 146
 147                 case PROGSW:
 148                 case LENSW:
 149                 case WIDTHSW:
 150                 case FMTPROCSW:
 151                     vec[vecp++] = --cp;
 152                     if (!(cp = *argp++) || *cp == '-')
 153                         adios (NULL, "missing argument to %s", argp[-2]);
 154                     vec[vecp++] = cp;
 155                     continue;
 156
 157                 case SHOWSW:
 158                     if (!(showproc = *argp++) || *showproc == '-')
 159                         adios (NULL, "missing argument to %s", argp[-2]);
 160                     nshow = 0;
 161                     continue;
 162                 case NSHOWSW:
 163                     nshow++;
 164                     continue;
 165
 166                 case SHOWMIMESW:
 167                     if (!(showmimeproc = *argp++) || *showmimeproc == '-')
 168                         adios (NULL, "missing argument to %s", argp[-2]);
 169                     nshow = 0;
 170                     continue;
 171                 case CHECKMIMESW:
 172                     checkmime++;
 173                     continue;
 174                 case NOCHECKMIMESW:
 175                     checkmime = 0;
 176                     continue;
 177             }
 178         }
 179         if (*cp == '+' || *cp == '@') {
 180             if (folder)
 181                 adios (NULL, "only one folder at a time!");
 182             else
 183                 folder = pluspath (cp);
 184         } else {
 185             if (mode != SHOW)
 186                 goto usage;
 187             else
 188                 msgs[msgp++] = cp;
 189         }
 190     }
 191     procp = vecp;
 192
 193     if (!context_find ("path"))
 194         free (path ("./", TFOLDER));
 195
 196     if (draftsw || file) {
 197         if (msgp)
 198             adios (NULL, "only one file at a time!");
 199         vec[vecp++] = draftsw
 200             ? getcpy (m_draft (folder, msgp ? msgs[0] : NULL, 1, &isdf))
 201             : file;
 202         goto go_to_it;
 203     }
 204
 205 #ifdef WHATNOW
 206     if (!msgp && !folder && mode == SHOW && (cp = getenv ("mhdraft")) && *cp) {
 207         draftsw++;
 208         vec[vecp++] = cp;
 209         goto go_to_it;
 210     }
 211 #endif /* WHATNOW */
 212
 213     if (!msgp) {
 214         switch (mode) {
 215             case NEXT:
 216                 msgs[msgp++] = "next";
 217                 break;
 218             case PREV:
 219                 msgs[msgp++] = "prev";
 220                 break;
 221             default:
 222                 msgs[msgp++] = "cur";
 223                 break;
 224         }
 225     }
 226
 227     if (!folder)
 228         folder = getfolder (1);
 229     maildir = m_maildir (folder);
 230
 231     if (chdir (maildir) == NOTOK)
 232         adios (maildir, "unable to change directory to");
 233
 234     /* read folder and create message structure */
 235     if (!(mp = folder_read (folder)))
 236         adios (NULL, "unable to read folder %s", folder);
 237
 238     /* check for empty folder */
 239     if (mp->nummsg == 0)
 240         adios (NULL, "no messages in %s", folder);
 241
 242     /* parse all the message ranges/sequences and set SELECTED */
 243     for (msgnum = 0; msgnum < msgp; msgnum++)
 244         if (!m_convert (mp, msgs[msgnum]))
 245             done (1);
 246
 247     /*
 248      * Set the SELECT_UNSEEN bit for all the SELECTED messages,
 249      * since we will use that as a tag to know which messages
 250      * to remove from the "unseen" sequence.
 251      */
 252     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 253         if (is_selected(mp, msgnum))
 254             set_unseen (mp, msgnum);
 255
 256     seq_setprev (mp);           /* set the Previous-Sequence */
 257     seq_setunseen (mp, 1);      /* unset the Unseen-Sequence */
 258
 259     if (mp->numsel > MAXARGS - 2)
 260         adios (NULL, "more than %d messages for show exec", MAXARGS - 2);
 261
 262     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 263         if (is_selected(mp, msgnum))
 264             vec[vecp++] = getcpy (m_name (msgnum));
 265
 266     seq_setcur (mp, mp->hghsel);        /* update current message  */
 267     seq_save (mp);                      /* synchronize sequences   */
 268     context_replace (pfolder, folder);  /* update current folder   */
 269     context_save ();                    /* save the context file   */
 270
 271     if (headersw && vecp == 2)
 272         printf ("(Message %s:%s)\n", folder, vec[1]);
 273
 274 go_to_it: ;
 275     fflush (stdout);
 276
 277     vec[vecp] = NULL;
 278
 279     /*
 280      * Decide which "proc" to use
 281      */
 282     mime = 0;
 283     if (nshow) {
 284         proc = catproc;
 285     } else {
 286         /* check if any messages are non-text MIME messages */
 287         if (checkmime && !getenv ("NOMHNPROC")) {
 288             if (!draftsw && !file) {
 289                 /* loop through selected messages and check for MIME */
 290                 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 291                     if (is_selected (mp, msgnum) && is_nontext (m_name (msgnum))) {
 292                         mime = 1;
 293                         break;
 294                     }
 295             } else {
 296                 /* check the file or draft for MIME */
 297                 if (is_nontext (vec[vecp - 1]))
 298                     mime = 1;
 299             }
 300         }
 301
 302         /* Set the "proc" */
 303         if (mime)
 304             proc = showmimeproc;
 305         else
 306             proc = showproc;
 307     }
 308
 309     if (folder && !draftsw && !file)
 310         m_putenv ("mhfolder", folder);
 311
 312     /*
 313      * For backward compatibility, if the "proc" is mhn,
 314      * then add "-show" option.  Add "-file" if showing
 315      * file or draft.
 316      */
 317     if (strcmp (r1bindex (proc, '/'), "mhn") == 0) {
 318         if (draftsw || file) {
 319             vec[vecp] = vec[vecp - 1];
 320             vec[vecp - 1] = "-file";
 321             vecp++;
 322         }
 323         vec[vecp++] = "-show";
 324         vec[vecp] = NULL;
 325     }
 326
 327     /* If the "proc" is "mhshow", add "-file" if showing file or draft.
 328      */
 329     if (strcmp (r1bindex (proc, '/'), "mhshow") == 0 && (draftsw || file) ) {
 330        vec[vecp] = vec[vecp - 1];
 331        vec[vecp - 1] = "-file";
 332        vec[++vecp] = NULL;
 333     }
 334
 335     /*
 336      * If "proc" is mhl, then run it internally
 337      * rather than exec'ing it.
 338      */
 339     if (strcmp (r1bindex (proc, '/'), "mhl") == 0) {
 340         vec[0] = "mhl";
 341         mhl (vecp, vec);
 342         done (0);
 343     }
 344
 345     /*
 346      * If you are not using a nmh command as your "proc", then
 347      * add the path to the message names.  Currently, we are just
 348      * checking for mhn here, since we've already taken care of mhl.
 349      */
 350     if (!strcmp (r1bindex (proc, '/'), "mhl")
 351             && !draftsw
 352             && !file
 353             && chdir (maildir = concat (m_maildir (""), "/", NULL)) != NOTOK) {
 354         mp->foldpath = concat (mp->foldpath, "/", NULL);
 355         cp = ssequal (maildir, mp->foldpath)
 356             ? mp->foldpath + strlen (maildir)
 357             : mp->foldpath;
 358         for (msgnum = procp; msgnum < vecp; msgnum++)
 359             vec[msgnum] = concat (cp, vec[msgnum], NULL);
 360     }
 361
 362     vec[0] = r1bindex (proc, '/');
 363     execvp (proc, vec);
 364     adios (proc, "unable to exec");
 365     return 0;  /* dead code to satisfy the compiler */
 366 }
 367
 368
 369 /*
 370  * Check if a message or file contains any non-text parts
 371  */
 372 static int
 373 is_nontext (char *msgnam)
 374 {
 375     int result, state;
 376     unsigned char *bp, *dp;
 377     char *cp;
 378     char buf[BUFSIZ], name[NAMESZ];
 379     FILE *fp;
 380
 381     if ((fp = fopen (msgnam, "r")) == NULL)
 382         return 0;
 383
 384     for (state = FLD;;) {
 385         switch (state = m_getfld (state, name, buf, sizeof(buf), fp)) {
 386         case FLD:
 387         case FLDPLUS:
 388         case FLDEOF:
 389             /*
 390              * Check Content-Type field
 391              */
 392             if (!mh_strcasecmp (name, TYPE_FIELD)) {
 393                 int passno;
 394                 char c;
 395
 396                 cp = add (buf, NULL);
 397                 while (state == FLDPLUS) {
 398                     state = m_getfld (state, name, buf, sizeof(buf), fp);
 399                     cp = add (buf, cp);
 400                 }
 401                 bp = cp;
 402                 passno = 1;
 403
 404 again:
 405                 for (; isspace (*bp); bp++)
 406                     continue;
 407                 if (*bp == '(') {
 408                     int i;
 409
 410                     for (bp++, i = 0;;) {
 411                         switch (*bp++) {
 412                         case '\0':
 413 invalid:
 414                             result = 0;
 415                             goto out;
 416                         case '\\':
 417                             if (*bp++ == '\0')
 418                                 goto invalid;
 419                             continue;
 420                         case '(':
 421                             i++;
 422                             /* and fall... */
 423                         default:
 424                             continue;
 425                         case ')':
 426                             if (--i < 0)
 427                                 break;
 428                             continue;
 429                         }
 430                         break;
 431                     }
 432                 }
 433                 if (passno == 2) {
 434                     if (*bp != '/')
 435                         goto invalid;
 436                     bp++;
 437                     passno = 3;
 438                     goto again;
 439                 }
 440                 for (dp = bp; istoken (*dp); dp++)
 441                     continue;
 442                 c = *dp;
 443                 *dp = '\0';
 444                 if (!*bp)
 445                     goto invalid;
 446                 if (passno > 1) {
 447                     if ((result = (mh_strcasecmp (bp, "plain") != 0)))
 448                         goto out;
 449                     *dp = c;
 450                     for (dp++; isspace (*dp); dp++)
 451                         continue;
 452                     if (*dp) {
 453                         if ((result = !uprf (dp, "charset")))
 454                             goto out;
 455                         dp += sizeof("charset") - 1;
 456                         while (isspace (*dp))
 457                             dp++;
 458                         if (*dp++ != '=')
 459                             goto invalid;
 460                         while (isspace (*dp))
 461                             dp++;
 462                         if (*dp == '"') {
 463                             if ((bp = strchr(++dp, '"')))
 464                                 *bp = '\0';
 465                         } else {
 466                             for (bp = dp; *bp; bp++)
 467                                 if (!istoken (*bp)) {
 468                                     *bp = '\0';
 469                                     break;
 470                                 }
 471                         }
 472                     } else {
 473                         /* Default character set */
 474                         dp = "US-ASCII";
 475                     }
 476                     /* Check the character set */
 477                     result = !check_charset (dp, strlen (dp));
 478                 } else {
 479                     if (!(result = (mh_strcasecmp (bp, "text") != 0))) {
 480                         *dp = c;
 481                         bp = dp;
 482                         passno = 2;
 483                         goto again;
 484                     }
 485                 }
 486 out:
 487                 free (cp);
 488                 if (result) {
 489                     fclose (fp);
 490                     return result;
 491                 }
 492                 break;
 493             }
 494
 495             /*
 496              * Check Content-Transfer-Encoding field
 497              */
 498             if (!mh_strcasecmp (name, ENCODING_FIELD)) {
 499                 cp = add (buf, NULL);
 500                 while (state == FLDPLUS) {
 501                     state = m_getfld (state, name, buf, sizeof(buf), fp);
 502                     cp = add (buf, cp);
 503                 }
 504                 for (bp = cp; isspace (*bp); bp++)
 505                     continue;
 506                 for (dp = bp; istoken (*dp); dp++)
 507                     continue;
 508                 *dp = '\0';
 509                 result = (mh_strcasecmp (bp, "7bit")
 510                        && mh_strcasecmp (bp, "8bit")
 511                        && mh_strcasecmp (bp, "binary"));
 512
 513                 free (cp);
 514                 if (result) {
 515                     fclose (fp);
 516                     return result;
 517                 }
 518                 break;
 519             }
 520
 521             /*
 522              * Just skip the rest of this header
 523              * field and go to next one.
 524              */
 525             while (state == FLDPLUS)
 526                 state = m_getfld (state, name, buf, sizeof(buf), fp);
 527             break;
 528
 529             /*
 530              * We've passed the message header,
 531              * so message is just text.
 532              */
 533         default:
 534             fclose (fp);
 535             return 0;
 536         }
 537     }
 538 }