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

   1
   2 /*
   3  * show.c -- show/list messages
   4  *
   5  * $Id$
   6  *
   7  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   8  * COPYRIGHT file in the root directory of the nmh distribution for
   9  * complete copyright information.
  10  */
  11
  12 #include <h/mh.h>
  13 #include <h/mime.h>
  14 #include <h/utils.h>
  15
  16 static struct swit switches[] = {
  17 #define CHECKMIMESW          0
  18     { "checkmime", 0 },
  19 #define NOCHECKMIMESW        1
  20     { "nocheckmime", 0 },
  21 #define HEADSW               2
  22     { "header", 0 },
  23 #define NHEADSW              3
  24     { "noheader", 0 },
  25 #define FORMSW               4
  26     { "form formfile", 0 },
  27 #define PROGSW               5
  28     { "moreproc program", 0 },
  29 #define NPROGSW              6
  30     { "nomoreproc", 0 },
  31 #define LENSW                7
  32     { "length lines", 0 },
  33 #define WIDTHSW              8
  34     { "width columns", 0 },
  35 #define SHOWSW               9
  36     { "showproc program", 0 },
  37 #define SHOWMIMESW          10
  38     { "showmimeproc program", 0 },
  39 #define NSHOWSW             11
  40     { "noshowproc", 0 },
  41 #define DRFTSW              12
  42     { "draft", 0 },
  43 #define FILESW              13
  44     { "file file", -4 },                /* interface from showfile */
  45 #define VERSIONSW           14
  46     { "version", 0 },
  47 #define HELPSW              15
  48     { "help", 0 },
  49     { NULL, 0 }
  50 };
  51
  52 /*
  53  * static prototypes
  54  */
  55 static int is_nontext(char *);
  56
  57 /* prototype from mhlsbr.c */
  58 int mhl (int, char **);
  59
  60 #define SHOW  0
  61 #define NEXT  1
  62 #define PREV  2
  63
  64
  65 int
  66 main (int argc, char **argv)
  67 {
  68     int draftsw = 0, headersw = 1, msgp = 0;
  69     int nshow = 0, checkmime = 1, mime;
  70     int vecp = 1, procp = 1, isdf = 0, mode = SHOW, msgnum;
  71     char *cp, *maildir, *file = NULL, *folder = NULL, *proc;
  72     char buf[BUFSIZ], **argp, **arguments;
  73     char *msgs[MAXARGS], *vec[MAXARGS];
  74     struct msgs *mp;
  75
  76 #ifdef LOCALE
  77     setlocale(LC_ALL, "");
  78 #endif
  79     invo_name = r1bindex (argv[0], '/');
  80
  81     /* read user profile/context */
  82     context_read();
  83
  84     if (!mh_strcasecmp (invo_name, "next")) {
  85         mode = NEXT;
  86     } else if (!mh_strcasecmp (invo_name, "prev")) {
  87         mode = PREV;
  88     }
  89     arguments = getarguments (invo_name, argc, argv, 1);
  90     argp = arguments;
  91
  92     while ((cp = *argp++)) {
  93         if (*cp == '-') {
  94             switch (smatch (++cp, switches)) {
  95                 case AMBIGSW:
  96                     ambigsw (cp, switches);
  97                     done (1);
  98                 case UNKWNSW:
  99                 case NPROGSW:
 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                     vec[vecp++] = --cp;
 151                     if (!(cp = *argp++) || *cp == '-')
 152                         adios (NULL, "missing argument to %s", argp[-2]);
 153                     vec[vecp++] = cp;
 154                     continue;
 155
 156                 case SHOWSW:
 157                     if (!(showproc = *argp++) || *showproc == '-')
 158                         adios (NULL, "missing argument to %s", argp[-2]);
 159                     nshow = 0;
 160                     continue;
 161                 case NSHOWSW:
 162                     nshow++;
 163                     continue;
 164
 165                 case SHOWMIMESW:
 166                     if (!(showmimeproc = *argp++) || *showmimeproc == '-')
 167                         adios (NULL, "missing argument to %s", argp[-2]);
 168                     nshow = 0;
 169                     continue;
 170                 case CHECKMIMESW:
 171                     checkmime++;
 172                     continue;
 173                 case NOCHECKMIMESW:
 174                     checkmime = 0;
 175                     continue;
 176             }
 177         }
 178         if (*cp == '+' || *cp == '@') {
 179             if (folder)
 180                 adios (NULL, "only one folder at a time!");
 181             else
 182                 folder = pluspath (cp);
 183         } else {
 184             if (mode != SHOW)
 185                 goto usage;
 186             else
 187                 msgs[msgp++] = cp;
 188         }
 189     }
 190     procp = vecp;
 191
 192     if (!context_find ("path"))
 193         free (path ("./", TFOLDER));
 194
 195     if (draftsw || file) {
 196         if (msgp)
 197             adios (NULL, "only one file at a time!");
 198         vec[vecp++] = draftsw
 199             ? getcpy (m_draft (folder, msgp ? msgs[0] : NULL, 1, &isdf))
 200             : file;
 201         goto go_to_it;
 202     }
 203
 204 #ifdef WHATNOW
 205     if (!msgp && !folder && mode == SHOW && (cp = getenv ("mhdraft")) && *cp) {
 206         draftsw++;
 207         vec[vecp++] = cp;
 208         goto go_to_it;
 209     }
 210 #endif /* WHATNOW */
 211
 212     if (!msgp) {
 213         switch (mode) {
 214             case NEXT:
 215                 msgs[msgp++] = "next";
 216                 break;
 217             case PREV:
 218                 msgs[msgp++] = "prev";
 219                 break;
 220             default:
 221                 msgs[msgp++] = "cur";
 222                 break;
 223         }
 224     }
 225
 226     if (!folder)
 227         folder = getfolder (1);
 228     maildir = m_maildir (folder);
 229
 230     if (chdir (maildir) == NOTOK)
 231         adios (maildir, "unable to change directory to");
 232
 233     /* read folder and create message structure */
 234     if (!(mp = folder_read (folder)))
 235         adios (NULL, "unable to read folder %s", folder);
 236
 237     /* check for empty folder */
 238     if (mp->nummsg == 0)
 239         adios (NULL, "no messages in %s", folder);
 240
 241     /* parse all the message ranges/sequences and set SELECTED */
 242     for (msgnum = 0; msgnum < msgp; msgnum++)
 243         if (!m_convert (mp, msgs[msgnum]))
 244             done (1);
 245
 246     /*
 247      * Set the SELECT_UNSEEN bit for all the SELECTED messages,
 248      * since we will use that as a tag to know which messages
 249      * to remove from the "unseen" sequence.
 250      */
 251     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 252         if (is_selected(mp, msgnum))
 253             set_unseen (mp, msgnum);
 254
 255     seq_setprev (mp);           /* set the Previous-Sequence */
 256     seq_setunseen (mp, 1);      /* unset the Unseen-Sequence */
 257
 258     if (mp->numsel > MAXARGS - 2)
 259         adios (NULL, "more than %d messages for show exec", MAXARGS - 2);
 260
 261     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 262         if (is_selected(mp, msgnum))
 263             vec[vecp++] = getcpy (m_name (msgnum));
 264
 265     seq_setcur (mp, mp->hghsel);        /* update current message  */
 266     seq_save (mp);                      /* synchronize sequences   */
 267     context_replace (pfolder, folder);  /* update current folder   */
 268     context_save ();                    /* save the context file   */
 269
 270     if (headersw && vecp == 2)
 271         printf ("(Message %s:%s)\n", folder, vec[1]);
 272
 273 go_to_it: ;
 274     fflush (stdout);
 275
 276     vec[vecp] = NULL;
 277
 278     /*
 279      * Decide which "proc" to use
 280      */
 281     mime = 0;
 282     if (nshow) {
 283         proc = catproc;
 284     } else {
 285         /* check if any messages are non-text MIME messages */
 286         if (checkmime && !getenv ("NOMHNPROC")) {
 287             if (!draftsw && !file) {
 288                 /* loop through selected messages and check for MIME */
 289                 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 290                     if (is_selected (mp, msgnum) && is_nontext (m_name (msgnum))) {
 291                         mime = 1;
 292                         break;
 293                     }
 294             } else {
 295                 /* check the file or draft for MIME */
 296                 if (is_nontext (vec[vecp - 1]))
 297                     mime = 1;
 298             }
 299         }
 300
 301         /* Set the "proc" */
 302         if (mime)
 303             proc = showmimeproc;
 304         else
 305             proc = showproc;
 306     }
 307
 308     if (folder && !draftsw && !file)
 309         m_putenv ("mhfolder", folder);
 310
 311     /*
 312      * For backward compatibility, if the "proc" is mhn,
 313      * then add "-show" option.  Add "-file" if showing
 314      * file or draft.
 315      */
 316     if (strcmp (r1bindex (proc, '/'), "mhn") == 0) {
 317         if (draftsw || file) {
 318             vec[vecp] = vec[vecp - 1];
 319             vec[vecp - 1] = "-file";
 320             vecp++;
 321         }
 322         vec[vecp++] = "-show";
 323         vec[vecp] = NULL;
 324     }
 325
 326     /* If the "proc" is "mhshow", add "-file" if showing file or draft.
 327      */
 328     if (strcmp (r1bindex (proc, '/'), "mhshow") == 0 && (draftsw || file) ) {
 329        vec[vecp] = vec[vecp - 1];
 330        vec[vecp - 1] = "-file";
 331        vec[++vecp] = NULL;
 332     }
 333
 334     /*
 335      * If "proc" is mhl, then run it internally
 336      * rather than exec'ing it.
 337      */
 338     if (strcmp (r1bindex (proc, '/'), "mhl") == 0) {
 339         vec[0] = "mhl";
 340         mhl (vecp, vec);
 341         done (0);
 342     }
 343
 344     /*
 345      * If you are not using a nmh command as your "proc", then
 346      * add the path to the message names.  Currently, we are just
 347      * checking for mhn here, since we've already taken care of mhl.
 348      */
 349     if (!strcmp (r1bindex (proc, '/'), "mhl")
 350             && !draftsw
 351             && !file
 352             && chdir (maildir = concat (m_maildir (""), "/", NULL)) != NOTOK) {
 353         mp->foldpath = concat (mp->foldpath, "/", NULL);
 354         cp = ssequal (maildir, mp->foldpath)
 355             ? mp->foldpath + strlen (maildir)
 356             : mp->foldpath;
 357         for (msgnum = procp; msgnum < vecp; msgnum++)
 358             vec[msgnum] = concat (cp, vec[msgnum], NULL);
 359     }
 360
 361     vec[0] = r1bindex (proc, '/');
 362     execvp (proc, vec);
 363     adios (proc, "unable to exec");
 364     return 0;  /* dead code to satisfy the compiler */
 365 }
 366
 367 /*
 368  * Cheat:  we are loaded with adrparse, which wants a routine called
 369  * OfficialName().  We call adrparse:getm() with the correct arguments
 370  * to prevent OfficialName() from being called.  Hence, the following
 371  * is to keep the loader happy.
 372  */
 373
 374 char *
 375 OfficialName (char *name)
 376 {
 377     return name;
 378 }
 379
 380
 381 /*
 382  * Check if a message or file contains any non-text parts
 383  */
 384 static int
 385 is_nontext (char *msgnam)
 386 {
 387     int result, state;
 388     unsigned char *bp, *dp;
 389     char *cp;
 390     char buf[BUFSIZ], name[NAMESZ];
 391     FILE *fp;
 392
 393     if ((fp = fopen (msgnam, "r")) == NULL)
 394         return 0;
 395
 396     for (state = FLD;;) {
 397         switch (state = m_getfld (state, name, buf, sizeof(buf), fp)) {
 398         case FLD:
 399         case FLDPLUS:
 400         case FLDEOF:
 401             /*
 402              * Check Content-Type field
 403              */
 404             if (!mh_strcasecmp (name, TYPE_FIELD)) {
 405                 int passno;
 406                 char c;
 407
 408                 cp = add (buf, NULL);
 409                 while (state == FLDPLUS) {
 410                     state = m_getfld (state, name, buf, sizeof(buf), fp);
 411                     cp = add (buf, cp);
 412                 }
 413                 bp = cp;
 414                 passno = 1;
 415
 416 again:
 417                 for (; isspace (*bp); bp++)
 418                     continue;
 419                 if (*bp == '(') {
 420                     int i;
 421
 422                     for (bp++, i = 0;;) {
 423                         switch (*bp++) {
 424                         case '\0':
 425 invalid:
 426                             result = 0;
 427                             goto out;
 428                         case '\\':
 429                             if (*bp++ == '\0')
 430                                 goto invalid;
 431                             continue;
 432                         case '(':
 433                             i++;
 434                             /* and fall... */
 435                         default:
 436                             continue;
 437                         case ')':
 438                             if (--i < 0)
 439                                 break;
 440                             continue;
 441                         }
 442                         break;
 443                     }
 444                 }
 445                 if (passno == 2) {
 446                     if (*bp != '/')
 447                         goto invalid;
 448                     bp++;
 449                     passno = 3;
 450                     goto again;
 451                 }
 452                 for (dp = bp; istoken (*dp); dp++)
 453                     continue;
 454                 c = *dp;
 455                 *dp = '\0';
 456                 if (!*bp)
 457                     goto invalid;
 458                 if (passno > 1) {
 459                     if ((result = (mh_strcasecmp (bp, "plain") != 0)))
 460                         goto out;
 461                     *dp = c;
 462                     for (dp++; isspace (*dp); dp++)
 463                         continue;
 464                     if (*dp) {
 465                         if ((result = !uprf (dp, "charset")))
 466                             goto out;
 467                         dp += sizeof("charset") - 1;
 468                         while (isspace (*dp))
 469                             dp++;
 470                         if (*dp++ != '=')
 471                             goto invalid;
 472                         while (isspace (*dp))
 473                             dp++;
 474                         if (*dp == '"') {
 475                             if ((bp = strchr(++dp, '"')))
 476                                 *bp = '\0';
 477                         } else {
 478                             for (bp = dp; *bp; bp++)
 479                                 if (!istoken (*bp)) {
 480                                     *bp = '\0';
 481                                     break;
 482                                 }
 483                         }
 484                     } else {
 485                         /* Default character set */
 486                         dp = "US-ASCII";
 487                     }
 488                     /* Check the character set */
 489                     result = !check_charset (dp, strlen (dp));
 490                 } else {
 491                     if (!(result = (mh_strcasecmp (bp, "text") != 0))) {
 492                         *dp = c;
 493                         bp = dp;
 494                         passno = 2;
 495                         goto again;
 496                     }
 497                 }
 498 out:
 499                 free (cp);
 500                 if (result) {
 501                     fclose (fp);
 502                     return result;
 503                 }
 504                 break;
 505             }
 506
 507             /*
 508              * Check Content-Transfer-Encoding field
 509              */
 510             if (!mh_strcasecmp (name, ENCODING_FIELD)) {
 511                 cp = add (buf, NULL);
 512                 while (state == FLDPLUS) {
 513                     state = m_getfld (state, name, buf, sizeof(buf), fp);
 514                     cp = add (buf, cp);
 515                 }
 516                 for (bp = cp; isspace (*bp); bp++)
 517                     continue;
 518                 for (dp = bp; istoken (*dp); dp++)
 519                     continue;
 520                 *dp = '\0';
 521                 result = (mh_strcasecmp (bp, "7bit")
 522                        && mh_strcasecmp (bp, "8bit")
 523                        && mh_strcasecmp (bp, "binary"));
 524
 525                 free (cp);
 526                 if (result) {
 527                     fclose (fp);
 528                     return result;
 529                 }
 530                 break;
 531             }
 532
 533             /*
 534              * Just skip the rest of this header
 535              * field and go to next one.
 536              */
 537             while (state == FLDPLUS)
 538                 state = m_getfld (state, name, buf, sizeof(buf), fp);
 539             break;
 540
 541             /*
 542              * We've passed the message header,
 543              * so message is just text.
 544              */
 545         default:
 546             fclose (fp);
 547             return 0;
 548         }
 549     }
 550 }