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
  15 static struct swit switches[] = {
  16 #define CHECKMIMESW          0
  17     { "checkmime", 0 },
  18 #define NOCHECKMIMESW        1
  19     { "nocheckmime", 0 },
  20 #define HEADSW               2
  21     { "header", 0 },
  22 #define NHEADSW              3
  23     { "noheader", 0 },
  24 #define FORMSW               4
  25     { "form formfile", 0 },
  26 #define PROGSW               5
  27     { "moreproc program", 0 },
  28 #define NPROGSW              6
  29     { "nomoreproc", 0 },
  30 #define LENSW                7
  31     { "length lines", 0 },
  32 #define WIDTHSW              8
  33     { "width columns", 0 },
  34 #define SHOWSW               9
  35     { "showproc program", 0 },
  36 #define SHOWMIMESW          10
  37     { "showmimeproc program", 0 },
  38 #define NSHOWSW             11
  39     { "noshowproc", 0 },
  40 #define DRFTSW              12
  41     { "draft", 0 },
  42 #define FILESW              13
  43     { "file file", -4 },                /* interface from showfile */
  44 #define VERSIONSW           14
  45     { "version", 0 },
  46 #define HELPSW              15
  47     { "help", 0 },
  48     { NULL, 0 }
  49 };
  50
  51 /*
  52  * static prototypes
  53  */
  54 static int is_nontext(char *);
  55
  56 /* prototype from mhlsbr.c */
  57 int mhl (int, 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;
  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 (!strcasecmp (invo_name, "next")) {
  84         mode = NEXT;
  85     } else if (!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                     vec[vecp++] = --cp;
 100                     continue;
 101
 102                 case HELPSW:
 103                     snprintf (buf, sizeof(buf),
 104                         "%s [+folder] %s[switches] [switches for showproc]",
 105                         invo_name, mode == SHOW ? "[msgs] ": "");
 106                     print_help (buf, switches, 1);
 107                     done (1);
 108                 case VERSIONSW:
 109                     print_version(invo_name);
 110                     done (1);
 111
 112                 case DRFTSW:
 113                     if (file)
 114                         adios (NULL, "only one file at a time!");
 115                     draftsw++;
 116                     if (mode == SHOW)
 117                         continue;
 118 usage:
 119                     adios (NULL,
 120                             "usage: %s [+folder] [switches] [switches for showproc]",
 121                             invo_name);
 122                 case FILESW:
 123                     if (mode != SHOW)
 124                         goto usage;
 125                     if (draftsw || file)
 126                         adios (NULL, "only one file at a time!");
 127                     if (!(cp = *argp++) || *cp == '-')
 128                         adios (NULL, "missing argument to %s", argp[-2]);
 129                     file = path (cp, TFILE);
 130                     continue;
 131
 132                 case HEADSW:
 133                     headersw++;
 134                     continue;
 135                 case NHEADSW:
 136                     headersw = 0;
 137                     continue;
 138
 139                 case FORMSW:
 140                     vec[vecp++] = --cp;
 141                     if (!(cp = *argp++) || *cp == '-')
 142                         adios (NULL, "missing argument to %s", argp[-2]);
 143                     vec[vecp++] = getcpy (etcpath(cp));
 144                     continue;
 145
 146                 case PROGSW:
 147                 case LENSW:
 148                 case WIDTHSW:
 149                     vec[vecp++] = --cp;
 150                     if (!(cp = *argp++) || *cp == '-')
 151                         adios (NULL, "missing argument to %s", argp[-2]);
 152                     vec[vecp++] = cp;
 153                     continue;
 154
 155                 case SHOWSW:
 156                     if (!(showproc = *argp++) || *showproc == '-')
 157                         adios (NULL, "missing argument to %s", argp[-2]);
 158                     nshow = 0;
 159                     continue;
 160                 case NSHOWSW:
 161                     nshow++;
 162                     continue;
 163
 164                 case SHOWMIMESW:
 165                     if (!(showmimeproc = *argp++) || *showmimeproc == '-')
 166                         adios (NULL, "missing argument to %s", argp[-2]);
 167                     nshow = 0;
 168                     continue;
 169                 case CHECKMIMESW:
 170                     checkmime++;
 171                     continue;
 172                 case NOCHECKMIMESW:
 173                     checkmime = 0;
 174                     continue;
 175             }
 176         }
 177         if (*cp == '+' || *cp == '@') {
 178             if (folder)
 179                 adios (NULL, "only one folder at a time!");
 180             else
 181                 folder = path (cp + 1, *cp == '+' ? TFOLDER : TSUBCWF);
 182         } else {
 183             if (mode != SHOW)
 184                 goto usage;
 185             else
 186                 msgs[msgp++] = cp;
 187         }
 188     }
 189     procp = vecp;
 190
 191     if (!context_find ("path"))
 192         free (path ("./", TFOLDER));
 193
 194     if (draftsw || file) {
 195         if (msgp)
 196             adios (NULL, "only one file at a time!");
 197         vec[vecp++] = draftsw
 198             ? getcpy (m_draft (folder, msgp ? msgs[0] : NULL, 1, &isdf))
 199             : file;
 200         goto go_to_it;
 201     }
 202
 203 #ifdef WHATNOW
 204     if (!msgp && !folder && mode == SHOW && (cp = getenv ("mhdraft")) && *cp) {
 205         draftsw++;
 206         vec[vecp++] = cp;
 207         goto go_to_it;
 208     }
 209 #endif /* WHATNOW */
 210
 211     if (!msgp) {
 212         switch (mode) {
 213             case NEXT:
 214                 msgs[msgp++] = "next";
 215                 break;
 216             case PREV:
 217                 msgs[msgp++] = "prev";
 218                 break;
 219             default:
 220                 msgs[msgp++] = "cur";
 221                 break;
 222         }
 223     }
 224
 225     if (!folder)
 226         folder = getfolder (1);
 227     maildir = m_maildir (folder);
 228
 229     if (chdir (maildir) == NOTOK)
 230         adios (maildir, "unable to change directory to");
 231
 232     /* read folder and create message structure */
 233     if (!(mp = folder_read (folder)))
 234         adios (NULL, "unable to read folder %s", folder);
 235
 236     /* check for empty folder */
 237     if (mp->nummsg == 0)
 238         adios (NULL, "no messages in %s", folder);
 239
 240     /* parse all the message ranges/sequences and set SELECTED */
 241     for (msgnum = 0; msgnum < msgp; msgnum++)
 242         if (!m_convert (mp, msgs[msgnum]))
 243             done (1);
 244
 245     /*
 246      * Set the SELECT_UNSEEN bit for all the SELECTED messages,
 247      * since we will use that as a tag to know which messages
 248      * to remove from the "unseen" sequence.
 249      */
 250     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 251         if (is_selected(mp, msgnum))
 252             set_unseen (mp, msgnum);
 253
 254     seq_setprev (mp);           /* set the Previous-Sequence */
 255     seq_setunseen (mp, 1);      /* unset the Unseen-Sequence */
 256
 257     if (mp->numsel > MAXARGS - 2)
 258         adios (NULL, "more than %d messages for show exec", MAXARGS - 2);
 259
 260     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 261         if (is_selected(mp, msgnum))
 262             vec[vecp++] = getcpy (m_name (msgnum));
 263
 264     seq_setcur (mp, mp->hghsel);        /* update current message  */
 265     seq_save (mp);                      /* synchronize sequences   */
 266     context_replace (pfolder, folder);  /* update current folder   */
 267     context_save ();                    /* save the context file   */
 268
 269     if (headersw && vecp == 2)
 270         printf ("(Message %s:%s)\n", folder, vec[1]);
 271
 272 go_to_it: ;
 273     fflush (stdout);
 274
 275     vec[vecp] = NULL;
 276
 277     /*
 278      * Decide which "proc" to use
 279      */
 280     mime = 0;
 281     if (nshow) {
 282         proc = catproc;
 283     } else {
 284         /* check if any messages are non-text MIME messages */
 285         if (checkmime && !getenv ("NOMHNPROC")) {
 286             if (!draftsw && !file) {
 287                 /* loop through selected messages and check for MIME */
 288                 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 289                     if (is_selected (mp, msgnum) && is_nontext (m_name (msgnum))) {
 290                         mime = 1;
 291                         break;
 292                     }
 293             } else {
 294                 /* check the file or draft for MIME */
 295                 if (is_nontext (vec[vecp - 1]))
 296                     mime = 1;
 297             }
 298         }
 299
 300         /* Set the "proc" */
 301         if (mime)
 302             proc = showmimeproc;
 303         else
 304             proc = showproc;
 305     }
 306
 307     if (folder && !draftsw && !file)
 308         m_putenv ("mhfolder", folder);
 309
 310     /*
 311      * For backward compatibility, if the "proc" is mhn,
 312      * then add "-show" option.  Add "-file" if showing
 313      * file or draft.
 314      */
 315     if (strcmp (r1bindex (proc, '/'), "mhn") == 0) {
 316         if (draftsw || file) {
 317             vec[vecp] = vec[vecp - 1];
 318             vec[vecp - 1] = "-file";
 319             vecp++;
 320         }
 321         vec[vecp++] = "-show";
 322         vec[vecp] = NULL;
 323     }
 324
 325     /* If the "proc" is "mhshow", add "-file" if showing file or draft.
 326      */
 327     if (strcmp (r1bindex (proc, '/'), "mhshow") == 0 && (draftsw || file) ) {
 328        vec[vecp] = vec[vecp - 1];
 329        vec[vecp - 1] = "-file";
 330        vec[++vecp] = NULL;
 331     }
 332
 333     /*
 334      * If "proc" is mhl, then run it internally
 335      * rather than exec'ing it.
 336      */
 337     if (strcmp (r1bindex (proc, '/'), "mhl") == 0) {
 338         vec[0] = "mhl";
 339         mhl (vecp, vec);
 340         done (0);
 341     }
 342
 343     /*
 344      * If you are not using a nmh command as your "proc", then
 345      * add the path to the message names.  Currently, we are just
 346      * checking for mhn here, since we've already taken care of mhl.
 347      */
 348     if (!strcmp (r1bindex (proc, '/'), "mhl")
 349             && !draftsw
 350             && !file
 351             && chdir (maildir = concat (m_maildir (""), "/", NULL)) != NOTOK) {
 352         mp->foldpath = concat (mp->foldpath, "/", NULL);
 353         cp = ssequal (maildir, mp->foldpath)
 354             ? mp->foldpath + strlen (maildir)
 355             : mp->foldpath;
 356         for (msgnum = procp; msgnum < vecp; msgnum++)
 357             vec[msgnum] = concat (cp, vec[msgnum], NULL);
 358     }
 359
 360     vec[0] = r1bindex (proc, '/');
 361     execvp (proc, vec);
 362     adios (proc, "unable to exec");
 363     return 0;  /* dead code to satisfy the compiler */
 364 }
 365
 366 /*
 367  * Cheat:  we are loaded with adrparse, which wants a routine called
 368  * OfficialName().  We call adrparse:getm() with the correct arguments
 369  * to prevent OfficialName() from being called.  Hence, the following
 370  * is to keep the loader happy.
 371  */
 372
 373 char *
 374 OfficialName (char *name)
 375 {
 376     return name;
 377 }
 378
 379
 380 /*
 381  * Check if a message or file contains any non-text parts
 382  */
 383 static int
 384 is_nontext (char *msgnam)
 385 {
 386     int result, state;
 387     char *bp, *cp, *dp;
 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 (!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 = (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 = (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 (!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 = (strcasecmp (bp, "7bit")
 520                        && strcasecmp (bp, "8bit")
 521                        && 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 }