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