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

   1 /*
   2  * show.c -- show/list messages
   3  *
   4  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   5  * COPYRIGHT file in the root directory of the nmh distribution for
   6  * complete copyright information.
   7  */
   8
   9 #include <h/mh.h>
  10 #include <h/mime.h>
  11 #include <h/utils.h>
  12
  13 #define SHOW_SWITCHES \
  14     X("checkmime", 0, CHECKMIMESW) \
  15     X("nocheckmime", 0, NOCHECKMIMESW) \
  16     X("header", 0, HEADSW) \
  17     X("noheader", 0, NHEADSW) \
  18     X("form formfile", 0, FORMSW) \
  19     X("moreproc program", 0, PROGSW) \
  20     X("nomoreproc", 0, NPROGSW) \
  21     X("length lines", 0, LENSW) \
  22     X("width columns", 0, WIDTHSW) \
  23     X("showproc program", 0, SHOWSW) \
  24     X("showmimeproc program", 0, SHOWMIMESW) \
  25     X("noshowproc", 0, NSHOWSW) \
  26     X("draft", 0, DRFTSW) \
  27     X("file file", -4, FILESW) /* interface from showfile */ \
  28     X("fmtproc program", 0, FMTPROCSW) \
  29     X("nofmtproc", 0, NFMTPROCSW) \
  30     X("version", 0, VERSIONSW) \
  31     X("help", 0, HELPSW) \
  32     /*                          \
  33      * switches for mhlproc     \
  34      */                         \
  35     X("concat", 0, CONCATSW) \
  36     X("noconcat", 0, NCONCATSW) \
  37     /*                          \
  38      * switches for mhshow      \
  39      */                         \
  40     X("part number", 0, PARTSW) \
  41     X("type content", 0, TYPESW) \
  42     X("prefer content", 0, PREFERSW) \
  43     X("markform file", 0, MARKFORMSW) \
  44     X("rcache policy", 0, RCACHESW) \
  45     X("wcache policy", 0, WCACHESW) \
  46
  47 #define X(sw, minchars, id) id,
  48 DEFINE_SWITCH_ENUM(SHOW);
  49 #undef X
  50
  51 #define X(sw, minchars, id) { sw, minchars, id },
  52 DEFINE_SWITCH_ARRAY(SHOW, switches);
  53 #undef X
  54
  55 /*
  56  * static prototypes
  57  */
  58 static int is_nontext(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;
  69     int nshow = 0, checkmime = 1, mime = 0;
  70     int isdf = 0, mode = SHOW, msgnum;
  71     char *cp, *maildir, *file = NULL, *folder = NULL, *proc, *program;
  72     char buf[BUFSIZ], **argp, **arguments;
  73     struct msgs *mp = NULL;
  74     struct msgs_array msgs = { 0, 0, NULL };
  75     struct msgs_array vec = { 0, 0, NULL }, non_mhl_vec = { 0, 0, NULL };
  76
  77     if (nmh_init(argv[0], 1)) { return 1; }
  78
  79     if (!strcasecmp (invo_name, "next")) {
  80         mode = NEXT;
  81     } else if (!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
  94                 case HEADSW:
  95                     headersw = 1;
  96                     goto non_mhl_switches;
  97                 case NHEADSW:
  98                     headersw = 0;
  99                 case CONCATSW:
 100                 case NCONCATSW:
 101 non_mhl_switches:
 102                     /* mhl can't handle these, so keep them separate. */
 103                     app_msgarg(&non_mhl_vec, --cp);
 104                     continue;
 105
 106                 case UNKWNSW:
 107                 case NPROGSW:
 108                 case NFMTPROCSW:
 109                     app_msgarg(&vec, --cp);
 110                     continue;
 111
 112                 case HELPSW:
 113                     snprintf (buf, sizeof(buf),
 114                         "%s [+folder] %s[switches] [switches for showproc]",
 115                         invo_name, mode == SHOW ? "[msgs] ": "");
 116                     print_help (buf, switches, 1);
 117                     done (0);
 118                 case VERSIONSW:
 119                     print_version(invo_name);
 120                     done (0);
 121
 122                 case DRFTSW:
 123                     if (file)
 124                         adios (NULL, "only one file at a time!");
 125                     draftsw++;
 126                     if (mode == SHOW)
 127                         continue;
 128 usage:
 129                     adios (NULL,
 130                             "usage: %s [+folder] [switches] [switches for showproc]",
 131                             invo_name);
 132                 case FILESW:
 133                     if (mode != SHOW)
 134                         goto usage;
 135                     if (draftsw || file)
 136                         adios (NULL, "only one file at a time!");
 137                     if (!(cp = *argp++) || *cp == '-')
 138                         adios (NULL, "missing argument to %s", argp[-2]);
 139                     file = path (cp, TFILE);
 140                     continue;
 141
 142                 case FORMSW:
 143                     app_msgarg(&vec, --cp);
 144                     if (!(cp = *argp++) || *cp == '-')
 145                         adios (NULL, "missing argument to %s", argp[-2]);
 146                     app_msgarg(&vec, getcpy (etcpath(cp)));
 147                     continue;
 148
 149                 case PROGSW:
 150                 case LENSW:
 151                 case WIDTHSW:
 152                 case FMTPROCSW:
 153                 case PARTSW:
 154                 case TYPESW:
 155                 case PREFERSW:
 156                 case MARKFORMSW:
 157                 case RCACHESW:
 158                 case WCACHESW:
 159                     app_msgarg(&vec, --cp);
 160                     if (!(cp = *argp++) || *cp == '-')
 161                         adios (NULL, "missing argument to %s", argp[-2]);
 162                     app_msgarg(&vec, cp);
 163                     continue;
 164
 165                 case SHOWSW:
 166                     if (!(showproc = *argp++) || *showproc == '-')
 167                         adios (NULL, "missing argument to %s", argp[-2]);
 168                     nshow = 0;
 169                     continue;
 170                 case NSHOWSW:
 171                     nshow++;
 172                     continue;
 173
 174                 case SHOWMIMESW:
 175                     if (!(showmimeproc = *argp++) || *showmimeproc == '-')
 176                         adios (NULL, "missing argument to %s", argp[-2]);
 177                     nshow = 0;
 178                     continue;
 179                 case CHECKMIMESW:
 180                     checkmime++;
 181                     continue;
 182                 case NOCHECKMIMESW:
 183                     checkmime = 0;
 184                     continue;
 185             }
 186         }
 187         if (*cp == '+' || *cp == '@') {
 188             if (folder)
 189                 adios (NULL, "only one folder at a time!");
 190             else
 191                 folder = pluspath (cp);
 192         } else {
 193             if (mode != SHOW)
 194                 goto usage;
 195             app_msgarg(&msgs, cp);
 196         }
 197     }
 198
 199     if (!context_find ("path"))
 200         free (path ("./", TFOLDER));
 201
 202     if (draftsw || file) {
 203         if (msgs.size)
 204             adios (NULL, "only one file at a time!");
 205         if (draftsw)
 206             app_msgarg(&vec, getcpy (m_draft (folder, NULL, 1, &isdf)));
 207         else
 208             app_msgarg(&vec, file);
 209         headersw = 0;
 210         goto go_to_it;
 211     }
 212
 213     if (!msgs.size) {
 214         switch (mode) {
 215             case NEXT:
 216                 app_msgarg(&msgs, "next");
 217                 break;
 218             case PREV:
 219                 app_msgarg(&msgs, "prev");
 220                 break;
 221             default:
 222                 app_msgarg(&msgs, "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, 1)))
 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 < msgs.size; msgnum++)
 244         if (!m_convert (mp, msgs.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     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 260         if (is_selected(mp, msgnum))
 261             app_msgarg(&vec, mh_xstrdup(m_name (msgnum)));
 262
 263     seq_setcur (mp, mp->hghsel);        /* update current message  */
 264     seq_save (mp);                      /* synchronize sequences   */
 265     context_replace (pfolder, folder);  /* update current folder   */
 266     context_save ();                    /* save the context file   */
 267
 268 go_to_it: ;
 269
 270     /*
 271      * Decide which "proc" to use
 272      */
 273     if (nshow) {
 274         proc = catproc;
 275     } else {
 276         /* check if any messages are non-text MIME messages */
 277         if (! mime  &&  checkmime) {
 278             if (!draftsw && !file) {
 279                 /* loop through selected messages and check for MIME */
 280                 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 281                     if (is_selected (mp, msgnum) && is_nontext (m_name (msgnum))) {
 282                         mime = 1;
 283                         break;
 284                     }
 285             } else {
 286                 /* check the file or draft for MIME */
 287                 if (is_nontext (vec.msgs[vec.size - 1]))
 288                     mime = 1;
 289             }
 290         }
 291
 292         /* Set the "proc" */
 293         if (mime)
 294             proc = showmimeproc;
 295         else
 296             proc = showproc;
 297     }
 298
 299     if (folder && !draftsw && !file)
 300         m_putenv ("mhfolder", folder);
 301
 302     if (strcmp (r1bindex (proc, '/'), "cat") == 0) {
 303
 304         if (headersw && vec.size == 1)
 305             printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 306
 307     } else if (strcmp (r1bindex (proc, '/'), "mhl") == 0) {
 308
 309         if (headersw && vec.size == 1)
 310             printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 311
 312         /* If "mhl", then run it internally */
 313         argsplit_insert(&vec, "mhl", &program);
 314         app_msgarg(&vec, NULL);
 315         mhl (vec.size, vec.msgs);
 316         done (0);
 317
 318     } else {
 319         int i;
 320         char **mp;
 321
 322         for (i = 0, mp = non_mhl_vec.msgs; i < non_mhl_vec.size; ++i, ++mp) {
 323             if (draftsw || file) {
 324                 /* Insert the switch before the filename. */
 325                 app_msgarg(&vec, vec.msgs[vec.size - 1]);
 326                 vec.msgs[vec.size - 2] = *mp;
 327             } else {
 328                 app_msgarg(&vec, *mp);
 329             }
 330         }
 331
 332         if (strcmp (r1bindex (proc, '/'), "mhn") == 0) {
 333             /* Add "-file" if showing file or draft, */
 334             if (draftsw || file) {
 335                 app_msgarg(&vec, vec.msgs[vec.size - 1]);
 336                 vec.msgs[vec.size - 2] = "-file";
 337             }
 338             /* and add -show for backward compatibility */
 339             app_msgarg(&vec, "-show");
 340         } else if (strcmp (r1bindex (proc, '/'), "mhshow") == 0) {
 341             /* If "mhshow", add "-file" if showing file or draft. */
 342             if (draftsw || file) {
 343                 app_msgarg(&vec, vec.msgs[vec.size - 1]);
 344                 vec.msgs[vec.size - 2] = "-file";
 345             }
 346         } else {
 347             if (headersw && vec.size == 1)
 348                 printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 349         }
 350     }
 351
 352     fflush (stdout);
 353
 354     argsplit_insert(&vec, proc, &program);
 355     app_msgarg(&vec, NULL);
 356     execvp (program, vec.msgs);
 357     adios (proc, "unable to exec");
 358     return 0;  /* dead code to satisfy the compiler */
 359 }
 360
 361
 362 /*
 363  * Check if a message or file contains any non-text parts
 364  */
 365 static int
 366 is_nontext (char *msgnam)
 367 {
 368     int result, state;
 369     char *bp, *dp, *cp;
 370     char buf[BUFSIZ], name[NAMESZ];
 371     FILE *fp;
 372     m_getfld_state_t gstate = 0;
 373
 374     if ((fp = fopen (msgnam, "r")) == NULL)
 375         return 0;
 376
 377     for (;;) {
 378         int bufsz = sizeof buf;
 379         switch (state = m_getfld (&gstate, name, buf, &bufsz, fp)) {
 380         case FLD:
 381         case FLDPLUS:
 382             /*
 383              * Check Content-Type field
 384              */
 385             if (!strcasecmp (name, TYPE_FIELD)) {
 386                 int passno;
 387                 char c;
 388
 389                 cp = add (buf, NULL);
 390                 while (state == FLDPLUS) {
 391                     bufsz = sizeof buf;
 392                     state = m_getfld (&gstate, name, buf, &bufsz, fp);
 393                     cp = add (buf, cp);
 394                 }
 395                 bp = cp;
 396                 passno = 1;
 397
 398 again:
 399                 for (; isspace ((unsigned char) *bp); bp++)
 400                     continue;
 401                 if (*bp == '(') {
 402                     int i;
 403
 404                     for (bp++, i = 0;;) {
 405                         switch (*bp++) {
 406                         case '\0':
 407 invalid:
 408                             result = 0;
 409                             goto out;
 410                         case '\\':
 411                             if (*bp++ == '\0')
 412                                 goto invalid;
 413                             continue;
 414                         case '(':
 415                             i++;
 416                             /* and fall... */
 417                         default:
 418                             continue;
 419                         case ')':
 420                             if (--i < 0)
 421                                 break;
 422                             continue;
 423                         }
 424                         break;
 425                     }
 426                 }
 427                 if (passno == 2) {
 428                     if (*bp != '/')
 429                         goto invalid;
 430                     bp++;
 431                     passno = 3;
 432                     goto again;
 433                 }
 434                 for (dp = bp; istoken (*dp); dp++)
 435                     continue;
 436                 c = *dp;
 437                 *dp = '\0';
 438                 if (!*bp)
 439                     goto invalid;
 440                 if (passno > 1) {
 441                     if ((result = (strcasecmp (bp, "plain") != 0)))
 442                         goto out;
 443                     *dp = c;
 444                     for (dp++; isspace ((unsigned char) *dp); dp++)
 445                         continue;
 446                     if (*dp) {
 447                         if ((result = !uprf (dp, "charset")))
 448                             goto out;
 449                         dp += LEN("charset");
 450                         while (isspace ((unsigned char) *dp))
 451                             dp++;
 452                         if (*dp++ != '=')
 453                             goto invalid;
 454                         while (isspace ((unsigned char) *dp))
 455                             dp++;
 456                         if (*dp == '"') {
 457                             if ((bp = strchr(++dp, '"')))
 458                                 *bp = '\0';
 459                         } else {
 460                             for (bp = dp; *bp; bp++)
 461                                 if (!istoken (*bp)) {
 462                                     *bp = '\0';
 463                                     break;
 464                                 }
 465                         }
 466                     } else {
 467                         /* Default character set */
 468                         dp = "US-ASCII";
 469                     }
 470                     /* Check the character set */
 471                     result = !check_charset (dp, strlen (dp));
 472                 } else {
 473                     if (!(result = (strcasecmp (bp, "text") != 0))) {
 474                         *dp = c;
 475                         bp = dp;
 476                         passno = 2;
 477                         goto again;
 478                     }
 479                 }
 480 out:
 481                 free (cp);
 482                 if (result) {
 483                     fclose (fp);
 484                     m_getfld_state_destroy (&gstate);
 485                     return result;
 486                 }
 487                 break;
 488             }
 489
 490             /*
 491              * Check Content-Transfer-Encoding field
 492              */
 493             if (!strcasecmp (name, ENCODING_FIELD)) {
 494                 cp = add (buf, NULL);
 495                 while (state == FLDPLUS) {
 496                     bufsz = sizeof buf;
 497                     state = m_getfld (&gstate, name, buf, &bufsz, fp);
 498                     cp = add (buf, cp);
 499                 }
 500                 for (bp = cp; isspace ((unsigned char) *bp); bp++)
 501                     continue;
 502                 for (dp = bp; istoken ((unsigned char) *dp); dp++)
 503                     continue;
 504                 *dp = '\0';
 505                 result = (strcasecmp (bp, "7bit")
 506                        && strcasecmp (bp, "8bit")
 507                        && strcasecmp (bp, "binary"));
 508
 509                 free (cp);
 510                 if (result) {
 511                     fclose (fp);
 512                     m_getfld_state_destroy (&gstate);
 513                     return result;
 514                 }
 515                 break;
 516             }
 517
 518             /*
 519              * Just skip the rest of this header
 520              * field and go to next one.
 521              */
 522             while (state == FLDPLUS) {
 523                 bufsz = sizeof buf;
 524                 state = m_getfld (&gstate, name, buf, &bufsz, fp);
 525             }
 526             break;
 527
 528             /*
 529              * We've passed the message header,
 530              * so message is just text.
 531              */
 532         default:
 533             fclose (fp);
 534             m_getfld_state_destroy (&gstate);
 535             return 0;
 536         }
 537     }
 538 }