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

   1
   2 /*
   3  * show.c -- show/list messages
   4  *
   5  * $Id$
   6  */
   7
   8 #include <h/mh.h>
   9 #include <h/mime.h>
  10
  11 static struct swit switches[] = {
  12 #define CHECKMIMESW          0
  13     { "checkmime", 0 },
  14 #define NOCHECKMIMESW        1
  15     { "nocheckmime", 0 },
  16 #define HEADSW               2
  17     { "header", 0 },
  18 #define NHEADSW              3
  19     { "noheader", 0 },
  20 #define FORMSW               4
  21     { "form formfile", 0 },
  22 #define PROGSW               5
  23     { "moreproc program", 0 },
  24 #define NPROGSW              6
  25     { "nomoreproc", 0 },
  26 #define LENSW                7
  27     { "length lines", 0 },
  28 #define WIDTHSW              8
  29     { "width columns", 0 },
  30 #define SHOWSW               9
  31     { "showproc program", 0 },
  32 #define SHOWMIMESW          10
  33     { "showmimeproc program", 0 },
  34 #define NSHOWSW             11
  35     { "noshowproc", 0 },
  36 #define DRFTSW              12
  37     { "draft", 0 },
  38 #define FILESW              13
  39     { "file file", -4 },                /* interface from showfile */
  40 #define VERSIONSW           14
  41     { "version", 0 },
  42 #define HELPSW              15
  43     { "help", 0 },
  44     { NULL, 0 }
  45 };
  46
  47 /*
  48  * static prototypes
  49  */
  50 static int is_nontext(char *);
  51
  52 #define SHOW  0
  53 #define NEXT  1
  54 #define PREV  2
  55
  56
  57 int
  58 main (int argc, char **argv)
  59 {
  60     int draftsw = 0, headersw = 1, msgp = 0;
  61     int nshow = 0, checkmime = 1, mime;
  62     int vecp = 1, procp = 1, isdf = 0, mode = SHOW, msgnum;
  63     char *cp, *maildir, *file = NULL, *folder = NULL, *proc;
  64     char buf[BUFSIZ], **argp, **arguments;
  65     char *msgs[MAXARGS], *vec[MAXARGS];
  66     struct msgs *mp;
  67
  68 #ifdef LOCALE
  69     setlocale(LC_ALL, "");
  70 #endif
  71     invo_name = r1bindex (argv[0], '/');
  72
  73     /* read user profile/context */
  74     context_read();
  75
  76     if (!strcasecmp (invo_name, "next")) {
  77         mode = NEXT;
  78     } else if (!strcasecmp (invo_name, "prev")) {
  79         mode = PREV;
  80     }
  81     arguments = getarguments (invo_name, argc, argv, 1);
  82     argp = arguments;
  83
  84     while ((cp = *argp++)) {
  85         if (*cp == '-') {
  86             switch (smatch (++cp, switches)) {
  87                 case AMBIGSW:
  88                     ambigsw (cp, switches);
  89                     done (1);
  90                 case UNKWNSW:
  91                 case NPROGSW:
  92                     vec[vecp++] = --cp;
  93                     continue;
  94
  95                 case HELPSW:
  96                     snprintf (buf, sizeof(buf),
  97                         "%s [+folder] %s[switches] [switches for showproc]",
  98                         invo_name, mode == SHOW ? "[msgs] ": "");
  99                     print_help (buf, switches, 1);
 100                     done (1);
 101                 case VERSIONSW:
 102                     print_version(invo_name);
 103                     done (1);
 104
 105                 case DRFTSW:
 106                     if (file)
 107                         adios (NULL, "only one file at a time!");
 108                     draftsw++;
 109                     if (mode == SHOW)
 110                         continue;
 111 usage:
 112                     adios (NULL,
 113                             "usage: %s [+folder] [switches] [switches for showproc]",
 114                             invo_name);
 115                 case FILESW:
 116                     if (mode != SHOW)
 117                         goto usage;
 118                     if (draftsw || file)
 119                         adios (NULL, "only one file at a time!");
 120                     if (!(cp = *argp++) || *cp == '-')
 121                         adios (NULL, "missing argument to %s", argp[-2]);
 122                     file = path (cp, TFILE);
 123                     continue;
 124
 125                 case HEADSW:
 126                     headersw++;
 127                     continue;
 128                 case NHEADSW:
 129                     headersw = 0;
 130                     continue;
 131
 132                 case FORMSW:
 133                     vec[vecp++] = --cp;
 134                     if (!(cp = *argp++) || *cp == '-')
 135                         adios (NULL, "missing argument to %s", argp[-2]);
 136                     vec[vecp++] = getcpy (etcpath(cp));
 137                     continue;
 138
 139                 case PROGSW:
 140                 case LENSW:
 141                 case WIDTHSW:
 142                     vec[vecp++] = --cp;
 143                     if (!(cp = *argp++) || *cp == '-')
 144                         adios (NULL, "missing argument to %s", argp[-2]);
 145                     vec[vecp++] = cp;
 146                     continue;
 147
 148                 case SHOWSW:
 149                     if (!(showproc = *argp++) || *showproc == '-')
 150                         adios (NULL, "missing argument to %s", argp[-2]);
 151                     nshow = 0;
 152                     continue;
 153                 case NSHOWSW:
 154                     nshow++;
 155                     continue;
 156
 157                 case SHOWMIMESW:
 158                     if (!(showmimeproc = *argp++) || *showmimeproc == '-')
 159                         adios (NULL, "missing argument to %s", argp[-2]);
 160                     nshow = 0;
 161                     continue;
 162                 case CHECKMIMESW:
 163                     checkmime++;
 164                     continue;
 165                 case NOCHECKMIMESW:
 166                     checkmime = 0;
 167                     continue;
 168             }
 169         }
 170         if (*cp == '+' || *cp == '@') {
 171             if (folder)
 172                 adios (NULL, "only one folder at a time!");
 173             else
 174                 folder = path (cp + 1, *cp == '+' ? TFOLDER : TSUBCWF);
 175         } else {
 176             if (mode != SHOW)
 177                 goto usage;
 178             else
 179                 msgs[msgp++] = cp;
 180         }
 181     }
 182     procp = vecp;
 183
 184     if (!context_find ("path"))
 185         free (path ("./", TFOLDER));
 186
 187     if (draftsw || file) {
 188         if (msgp)
 189             adios (NULL, "only one file at a time!");
 190         vec[vecp++] = draftsw
 191             ? getcpy (m_draft (folder, msgp ? msgs[0] : NULL, 1, &isdf))
 192             : file;
 193         goto go_to_it;
 194     }
 195
 196 #ifdef WHATNOW
 197     if (!msgp && !folder && mode == SHOW && (cp = getenv ("mhdraft")) && *cp) {
 198         draftsw++;
 199         vec[vecp++] = cp;
 200         goto go_to_it;
 201     }
 202 #endif /* WHATNOW */
 203
 204     if (!msgp) {
 205         switch (mode) {
 206             case NEXT:
 207                 msgs[msgp++] = "next";
 208                 break;
 209             case PREV:
 210                 msgs[msgp++] = "prev";
 211                 break;
 212             default:
 213                 msgs[msgp++] = "cur";
 214                 break;
 215         }
 216     }
 217
 218     if (!folder)
 219         folder = getfolder (1);
 220     maildir = m_maildir (folder);
 221
 222     if (chdir (maildir) == NOTOK)
 223         adios (maildir, "unable to change directory to");
 224
 225     /* read folder and create message structure */
 226     if (!(mp = folder_read (folder)))
 227         adios (NULL, "unable to read folder %s", folder);
 228
 229     /* check for empty folder */
 230     if (mp->nummsg == 0)
 231         adios (NULL, "no messages in %s", folder);
 232
 233     /* parse all the message ranges/sequences and set SELECTED */
 234     for (msgnum = 0; msgnum < msgp; msgnum++)
 235         if (!m_convert (mp, msgs[msgnum]))
 236             done (1);
 237
 238     /*
 239      * Set the SELECT_UNSEEN bit for all the SELECTED messages,
 240      * since we will use that as a tag to know which messages
 241      * to remove from the "unseen" sequence.
 242      */
 243     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 244         if (is_selected(mp, msgnum))
 245             set_unseen (mp, msgnum);
 246
 247     seq_setprev (mp);           /* set the Previous-Sequence */
 248     seq_setunseen (mp, 1);      /* unset the Unseen-Sequence */
 249
 250     if (mp->numsel > MAXARGS - 2)
 251         adios (NULL, "more than %d messages for show exec", MAXARGS - 2);
 252
 253     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 254         if (is_selected(mp, msgnum))
 255             vec[vecp++] = getcpy (m_name (msgnum));
 256
 257     seq_setcur (mp, mp->hghsel);        /* update current message  */
 258     seq_save (mp);                      /* synchronize sequences   */
 259     context_replace (pfolder, folder);  /* update current folder   */
 260     context_save ();                    /* save the context file   */
 261
 262     if (headersw && vecp == 2)
 263         printf ("(Message %s:%s)\n", folder, vec[1]);
 264
 265 go_to_it: ;
 266     fflush (stdout);
 267
 268     vec[vecp] = NULL;
 269
 270     /*
 271      * Decide which "proc" to use
 272      */
 273     mime = 0;
 274     if (nshow) {
 275         proc = catproc;
 276     } else {
 277         /* check if any messages are non-text MIME messages */
 278         if (checkmime && !getenv ("NOMHNPROC")) {
 279             if (!draftsw && !file) {
 280                 /* loop through selected messages and check for MIME */
 281                 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 282                     if (is_selected (mp, msgnum) && is_nontext (m_name (msgnum))) {
 283                         mime = 1;
 284                         break;
 285                     }
 286             } else {
 287                 /* check the file or draft for MIME */
 288                 if (is_nontext (vec[vecp - 1]))
 289                     mime = 1;
 290             }
 291         }
 292
 293         /* Set the "proc" */
 294         if (mime)
 295             proc = showmimeproc;
 296         else
 297             proc = showproc;
 298     }
 299
 300     if (folder && !draftsw && !file)
 301         m_putenv ("mhfolder", folder);
 302
 303     /*
 304      * For backward compatibility, if the "proc" is mhn,
 305      * then add "-show" option.  Add "-file" if showing
 306      * file or draft.
 307      */
 308     if (strcmp (r1bindex (proc, '/'), "mhn") == 0) {
 309         if (draftsw || file) {
 310             vec[vecp] = vec[vecp - 1];
 311             vec[vecp - 1] = "-file";
 312             vecp++;
 313         }
 314         vec[vecp++] = "-show";
 315         vec[vecp] = NULL;
 316     }
 317
 318     /* If the "proc" is "mhshow", add "-file" if showing file or draft.
 319      */
 320     if (strcmp (r1bindex (proc, '/'), "mhshow") == 0 && (draftsw || file) ) {
 321        vec[vecp] = vec[vecp - 1];
 322        vec[vecp - 1] = "-file";
 323        vec[++vecp] = NULL;
 324     }
 325
 326     /*
 327      * If "proc" is mhl, then run it internally
 328      * rather than exec'ing it.
 329      */
 330     if (strcmp (r1bindex (proc, '/'), "mhl") == 0) {
 331         vec[0] = "mhl";
 332         mhl (vecp, vec);
 333         done (0);
 334     }
 335
 336     /*
 337      * If you are not using a nmh command as your "proc", then
 338      * add the path to the message names.  Currently, we are just
 339      * checking for mhn here, since we've already taken care of mhl.
 340      */
 341     if (!strcmp (r1bindex (proc, '/'), "mhl")
 342             && !draftsw
 343             && !file
 344             && chdir (maildir = concat (m_maildir (""), "/", NULL)) != NOTOK) {
 345         mp->foldpath = concat (mp->foldpath, "/", NULL);
 346         cp = ssequal (maildir, mp->foldpath)
 347             ? mp->foldpath + strlen (maildir)
 348             : mp->foldpath;
 349         for (msgnum = procp; msgnum < vecp; msgnum++)
 350             vec[msgnum] = concat (cp, vec[msgnum], NULL);
 351     }
 352
 353     vec[0] = r1bindex (proc, '/');
 354     execvp (proc, vec);
 355     adios (proc, "unable to exec");
 356 }
 357
 358 /*
 359  * Cheat:  we are loaded with adrparse, which wants a routine called
 360  * OfficialName().  We call adrparse:getm() with the correct arguments
 361  * to prevent OfficialName() from being called.  Hence, the following
 362  * is to keep the loader happy.
 363  */
 364
 365 char *
 366 OfficialName (char *name)
 367 {
 368     return name;
 369 }
 370
 371
 372 /*
 373  * Check if a message or file contains any non-text parts
 374  */
 375 static int
 376 is_nontext (char *msgnam)
 377 {
 378     int result, state;
 379     char *bp, *cp, *dp;
 380     char buf[BUFSIZ], name[NAMESZ];
 381     FILE *fp;
 382
 383     if ((fp = fopen (msgnam, "r")) == NULL)
 384         return 0;
 385
 386     for (state = FLD;;) {
 387         switch (state = m_getfld (state, name, buf, sizeof(buf), fp)) {
 388         case FLD:
 389         case FLDPLUS:
 390         case FLDEOF:
 391             /*
 392              * Check Content-Type field
 393              */
 394             if (!strcasecmp (name, TYPE_FIELD)) {
 395                 int passno;
 396                 char c;
 397
 398                 cp = add (buf, NULL);
 399                 while (state == FLDPLUS) {
 400                     state = m_getfld (state, name, buf, sizeof(buf), fp);
 401                     cp = add (buf, cp);
 402                 }
 403                 bp = cp;
 404                 passno = 1;
 405
 406 again:
 407                 for (; isspace (*bp); bp++)
 408                     continue;
 409                 if (*bp == '(') {
 410                     int i;
 411
 412                     for (bp++, i = 0;;) {
 413                         switch (*bp++) {
 414                         case '\0':
 415 invalid:
 416                             result = 0;
 417                             goto out;
 418                         case '\\':
 419                             if (*bp++ == '\0')
 420                                 goto invalid;
 421                             continue;
 422                         case '(':
 423                             i++;
 424                             /* and fall... */
 425                         default:
 426                             continue;
 427                         case ')':
 428                             if (--i < 0)
 429                                 break;
 430                             continue;
 431                         }
 432                         break;
 433                     }
 434                 }
 435                 if (passno == 2) {
 436                     if (*bp != '/')
 437                         goto invalid;
 438                     bp++;
 439                     passno = 3;
 440                     goto again;
 441                 }
 442                 for (dp = bp; istoken (*dp); dp++)
 443                     continue;
 444                 c = *dp;
 445                 *dp = '\0';
 446                 if (!*bp)
 447                     goto invalid;
 448                 if (passno > 1) {
 449                     if ((result = (strcasecmp (bp, "plain") != 0)))
 450                         goto out;
 451                     *dp = c;
 452                     for (dp++; isspace (*dp); dp++)
 453                         continue;
 454                     if (*dp) {
 455                         if ((result = !uprf (dp, "charset")))
 456                             goto out;
 457                         dp += sizeof("charset") - 1;
 458                         while (isspace (*dp))
 459                             dp++;
 460                         if (*dp++ != '=')
 461                             goto invalid;
 462                         while (isspace (*dp))
 463                             dp++;
 464                         if (*dp == '"') {
 465                             if ((bp = strchr(++dp, '"')))
 466                                 *bp = '\0';
 467                         } else {
 468                             for (bp = dp; *bp; bp++)
 469                                 if (isspace (*bp)) {
 470                                     *bp = '\0';
 471                                     break;
 472                                 }
 473                         }
 474                     } else {
 475                         /* Default character set */
 476                         dp = "US-ASCII";
 477                     }
 478                     /* Check the character set */
 479                     result = !check_charset (dp, strlen (dp));
 480                 } else {
 481                     if (!(result = (strcasecmp (bp, "text") != 0))) {
 482                         *dp = c;
 483                         bp = dp;
 484                         passno = 2;
 485                         goto again;
 486                     }
 487                 }
 488 out:
 489                 free (cp);
 490                 if (result) {
 491                     fclose (fp);
 492                     return result;
 493                 }
 494                 break;
 495             }
 496
 497             /*
 498              * Check Content-Transfer-Encoding field
 499              */
 500             if (!strcasecmp (name, ENCODING_FIELD)) {
 501                 cp = add (buf, NULL);
 502                 while (state == FLDPLUS) {
 503                     state = m_getfld (state, name, buf, sizeof(buf), fp);
 504                     cp = add (buf, cp);
 505                 }
 506                 for (bp = cp; isspace (*bp); bp++)
 507                     continue;
 508                 for (dp = bp; istoken (*dp); dp++)
 509                     continue;
 510                 *dp = '\0';
 511                 result = (strcasecmp (bp, "7bit")
 512                        && strcasecmp (bp, "8bit")
 513                        && strcasecmp (bp, "binary"));
 514
 515                 free (cp);
 516                 if (result) {
 517                     fclose (fp);
 518                     return result;
 519                 }
 520                 break;
 521             }
 522
 523             /*
 524              * Just skip the rest of this header
 525              * field and go to next one.
 526              */
 527             while (state == FLDPLUS)
 528                 state = m_getfld (state, name, buf, sizeof(buf), fp);
 529             break;
 530
 531             /*
 532              * We've passed the message header,
 533              * so message is just text.
 534              */
 535         default:
 536             fclose (fp);
 537             return 0;
 538         }
 539     }
 540 }