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 #define SHOW_SWITCHES \
  15     X("checkmime", 0, CHECKMIMESW) \
  16     X("nocheckmime", 0, NOCHECKMIMESW) \
  17     X("header", 0, HEADSW) \
  18     X("noheader", 0, NHEADSW) \
  19     X("form formfile", 0, FORMSW) \
  20     X("moreproc program", 0, PROGSW) \
  21     X("nomoreproc", 0, NPROGSW) \
  22     X("length lines", 0, LENSW) \
  23     X("width columns", 0, WIDTHSW) \
  24     X("showproc program", 0, SHOWSW) \
  25     X("showmimeproc program", 0, SHOWMIMESW) \
  26     X("noshowproc", 0, NSHOWSW) \
  27     X("draft", 0, DRFTSW) \
  28     X("file file", -4, FILESW) /* interface from showfile */ \
  29     X("fmtproc program", 0, FMTPROCSW) \
  30     X("nofmtproc", 0, NFMTPROCSW) \
  31     X("version", 0, VERSIONSW) \
  32     X("help", 0, HELPSW) \
  33
  34 #define X(sw, minchars, id) id,
  35 DEFINE_SWITCH_ENUM(SHOW);
  36 #undef X
  37
  38 #define X(sw, minchars, id) { sw, minchars, id },
  39 DEFINE_SWITCH_ARRAY(SHOW, switches);
  40 #undef X
  41
  42 /*
  43  * static prototypes
  44  */
  45 static int is_nontext(char *);
  46
  47 #define SHOW  0
  48 #define NEXT  1
  49 #define PREV  2
  50
  51
  52 int
  53 main (int argc, char **argv)
  54 {
  55     int draftsw = 0, headersw = 1;
  56     int nshow = 0, checkmime = 1, mime;
  57     int isdf = 0, mode = SHOW, msgnum;
  58     char *cp, *maildir, *file = NULL, *folder = NULL, *proc;
  59     char buf[BUFSIZ], **argp, **arguments;
  60     struct msgs *mp = NULL;
  61     struct msgs_array msgs = { 0, 0, NULL };
  62     struct msgs_array vec = { 0, 0, NULL };
  63
  64 #ifdef LOCALE
  65     setlocale(LC_ALL, "");
  66 #endif
  67     invo_name = r1bindex (argv[0], '/');
  68
  69     app_msgarg(&vec, NULL);  /* placeholder, filled later with proc name */
  70
  71     /* read user profile/context */
  72     context_read();
  73
  74     if (!mh_strcasecmp (invo_name, "next")) {
  75         mode = NEXT;
  76     } else if (!mh_strcasecmp (invo_name, "prev")) {
  77         mode = PREV;
  78     }
  79     arguments = getarguments (invo_name, argc, argv, 1);
  80     argp = arguments;
  81
  82     while ((cp = *argp++)) {
  83         if (*cp == '-') {
  84             switch (smatch (++cp, switches)) {
  85                 case AMBIGSW:
  86                     ambigsw (cp, switches);
  87                     done (1);
  88                 case UNKWNSW:
  89                 case NPROGSW:
  90                 case NFMTPROCSW:
  91                     app_msgarg(&vec, --cp);
  92                     continue;
  93
  94                 case HELPSW:
  95                     snprintf (buf, sizeof(buf),
  96                         "%s [+folder] %s[switches] [switches for showproc]",
  97                         invo_name, mode == SHOW ? "[msgs] ": "");
  98                     print_help (buf, switches, 1);
  99                     done (0);
 100                 case VERSIONSW:
 101                     print_version(invo_name);
 102                     done (0);
 103
 104                 case DRFTSW:
 105                     if (file)
 106                         adios (NULL, "only one file at a time!");
 107                     draftsw++;
 108                     if (mode == SHOW)
 109                         continue;
 110 usage:
 111                     adios (NULL,
 112                             "usage: %s [+folder] [switches] [switches for showproc]",
 113                             invo_name);
 114                 case FILESW:
 115                     if (mode != SHOW)
 116                         goto usage;
 117                     if (draftsw || file)
 118                         adios (NULL, "only one file at a time!");
 119                     if (!(cp = *argp++) || *cp == '-')
 120                         adios (NULL, "missing argument to %s", argp[-2]);
 121                     file = path (cp, TFILE);
 122                     continue;
 123
 124                 case HEADSW:
 125                     headersw++;
 126                     continue;
 127                 case NHEADSW:
 128                     headersw = 0;
 129                     continue;
 130
 131                 case FORMSW:
 132                     app_msgarg(&vec, --cp);
 133                     if (!(cp = *argp++) || *cp == '-')
 134                         adios (NULL, "missing argument to %s", argp[-2]);
 135                     app_msgarg(&vec, getcpy (etcpath(cp)));
 136                     continue;
 137
 138                 case PROGSW:
 139                 case LENSW:
 140                 case WIDTHSW:
 141                 case FMTPROCSW:
 142                     app_msgarg(&vec, --cp);
 143                     if (!(cp = *argp++) || *cp == '-')
 144                         adios (NULL, "missing argument to %s", argp[-2]);
 145                     app_msgarg(&vec, 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 = pluspath (cp);
 175         } else {
 176             if (mode != SHOW)
 177                 goto usage;
 178             else
 179                 app_msgarg(&msgs, cp);
 180         }
 181     }
 182
 183     if (!context_find ("path"))
 184         free (path ("./", TFOLDER));
 185
 186     if (draftsw || file) {
 187         if (msgs.size)
 188             adios (NULL, "only one file at a time!");
 189         if (draftsw)
 190             app_msgarg(&vec, getcpy (m_draft (folder, NULL, 1, &isdf)));
 191         else
 192             app_msgarg(&vec, file);
 193         goto go_to_it;
 194     }
 195
 196 #ifdef WHATNOW
 197     if (!msgs.size && !folder && mode == SHOW && (cp = getenv ("mhdraft")) && *cp) {
 198         draftsw++;
 199         app_msgarg(&vec, cp);
 200         goto go_to_it;
 201     }
 202 #endif /* WHATNOW */
 203
 204     if (!msgs.size) {
 205         switch (mode) {
 206             case NEXT:
 207                 app_msgarg(&msgs, "next");
 208                 break;
 209             case PREV:
 210                 app_msgarg(&msgs, "prev");
 211                 break;
 212             default:
 213                 app_msgarg(&msgs, "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 < msgs.size; msgnum++)
 235         if (!m_convert (mp, msgs.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     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 251         if (is_selected(mp, msgnum))
 252             app_msgarg(&vec, getcpy (m_name (msgnum)));
 253
 254     seq_setcur (mp, mp->hghsel);        /* update current message  */
 255     seq_save (mp);                      /* synchronize sequences   */
 256     context_replace (pfolder, folder);  /* update current folder   */
 257     context_save ();                    /* save the context file   */
 258
 259     if (headersw && vec.size == 2)
 260         printf ("(Message %s:%s)\n", folder, vec.msgs[1]);
 261
 262 go_to_it: ;
 263     fflush (stdout);
 264
 265     /*
 266      * Decide which "proc" to use
 267      */
 268     mime = 0;
 269     if (nshow) {
 270         proc = catproc;
 271     } else {
 272         /* check if any messages are non-text MIME messages */
 273         if (checkmime) {
 274             if (!draftsw && !file) {
 275                 /* loop through selected messages and check for MIME */
 276                 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 277                     if (is_selected (mp, msgnum) && is_nontext (m_name (msgnum))) {
 278                         mime = 1;
 279                         break;
 280                     }
 281             } else {
 282                 /* check the file or draft for MIME */
 283                 if (is_nontext (vec.msgs[vec.size - 1]))
 284                     mime = 1;
 285             }
 286         }
 287
 288         /* Set the "proc" */
 289         if (mime)
 290             proc = showmimeproc;
 291         else
 292             proc = showproc;
 293     }
 294
 295     if (folder && !draftsw && !file)
 296         m_putenv ("mhfolder", folder);
 297
 298     if (strcmp (r1bindex (proc, '/'), "mhn") == 0) {
 299         /* Add "-file" if showing file or draft, */
 300         if (draftsw || file) {
 301             app_msgarg(&vec, vec.msgs[vec.size - 1]);
 302             vec.msgs[vec.size - 2] = "-file";
 303         }
 304         /* and add -show for backward compatibility */
 305         app_msgarg(&vec, "-show");
 306     } else if (strcmp (r1bindex (proc, '/'), "mhshow") == 0) {
 307         /* If "mhshow", add "-file" if showing file or draft. */
 308         if (draftsw || file) {
 309             app_msgarg(&vec, vec.msgs[vec.size - 1]);
 310             vec.msgs[vec.size - 2] = "-file";
 311         }
 312     } else if (strcmp (r1bindex (proc, '/'), "mhl") == 0) {
 313         /* If "mhl", then run it internally */
 314         vec.msgs[0] = "mhl";
 315         app_msgarg(&vec, NULL);
 316         mhl (vec.size, vec.msgs);
 317         done (0);
 318     }
 319
 320     vec.msgs[0] = r1bindex (proc, '/');
 321     app_msgarg(&vec, NULL);
 322     execvp (proc, vec.msgs);
 323     adios (proc, "unable to exec");
 324     return 0;  /* dead code to satisfy the compiler */
 325 }
 326
 327
 328 /*
 329  * Check if a message or file contains any non-text parts
 330  */
 331 static int
 332 is_nontext (char *msgnam)
 333 {
 334     int result, state;
 335     unsigned char *bp, *dp;
 336     char *cp;
 337     char buf[BUFSIZ], name[NAMESZ];
 338     FILE *fp;
 339     m_getfld_state_t gstate = 0;
 340
 341     if ((fp = fopen (msgnam, "r")) == NULL)
 342         return 0;
 343
 344     for (;;) {
 345         int bufsz = sizeof buf;
 346         switch (state = m_getfld (&gstate, name, buf, &bufsz, fp)) {
 347         case FLD:
 348         case FLDPLUS:
 349             /*
 350              * Check Content-Type field
 351              */
 352             if (!mh_strcasecmp (name, TYPE_FIELD)) {
 353                 int passno;
 354                 char c;
 355
 356                 cp = add (buf, NULL);
 357                 while (state == FLDPLUS) {
 358                     bufsz = sizeof buf;
 359                     state = m_getfld (&gstate, name, buf, &bufsz, fp);
 360                     cp = add (buf, cp);
 361                 }
 362                 bp = cp;
 363                 passno = 1;
 364
 365 again:
 366                 for (; isspace (*bp); bp++)
 367                     continue;
 368                 if (*bp == '(') {
 369                     int i;
 370
 371                     for (bp++, i = 0;;) {
 372                         switch (*bp++) {
 373                         case '\0':
 374 invalid:
 375                             result = 0;
 376                             goto out;
 377                         case '\\':
 378                             if (*bp++ == '\0')
 379                                 goto invalid;
 380                             continue;
 381                         case '(':
 382                             i++;
 383                             /* and fall... */
 384                         default:
 385                             continue;
 386                         case ')':
 387                             if (--i < 0)
 388                                 break;
 389                             continue;
 390                         }
 391                         break;
 392                     }
 393                 }
 394                 if (passno == 2) {
 395                     if (*bp != '/')
 396                         goto invalid;
 397                     bp++;
 398                     passno = 3;
 399                     goto again;
 400                 }
 401                 for (dp = bp; istoken (*dp); dp++)
 402                     continue;
 403                 c = *dp;
 404                 *dp = '\0';
 405                 if (!*bp)
 406                     goto invalid;
 407                 if (passno > 1) {
 408                     if ((result = (mh_strcasecmp (bp, "plain") != 0)))
 409                         goto out;
 410                     *dp = c;
 411                     for (dp++; isspace (*dp); dp++)
 412                         continue;
 413                     if (*dp) {
 414                         if ((result = !uprf (dp, "charset")))
 415                             goto out;
 416                         dp += sizeof("charset") - 1;
 417                         while (isspace (*dp))
 418                             dp++;
 419                         if (*dp++ != '=')
 420                             goto invalid;
 421                         while (isspace (*dp))
 422                             dp++;
 423                         if (*dp == '"') {
 424                             if ((bp = strchr(++dp, '"')))
 425                                 *bp = '\0';
 426                         } else {
 427                             for (bp = dp; *bp; bp++)
 428                                 if (!istoken (*bp)) {
 429                                     *bp = '\0';
 430                                     break;
 431                                 }
 432                         }
 433                     } else {
 434                         /* Default character set */
 435                         dp = "US-ASCII";
 436                     }
 437                     /* Check the character set */
 438                     result = !check_charset (dp, strlen (dp));
 439                 } else {
 440                     if (!(result = (mh_strcasecmp (bp, "text") != 0))) {
 441                         *dp = c;
 442                         bp = dp;
 443                         passno = 2;
 444                         goto again;
 445                     }
 446                 }
 447 out:
 448                 free (cp);
 449                 if (result) {
 450                     fclose (fp);
 451                     return result;
 452                 }
 453                 break;
 454             }
 455
 456             /*
 457              * Check Content-Transfer-Encoding field
 458              */
 459             if (!mh_strcasecmp (name, ENCODING_FIELD)) {
 460                 cp = add (buf, NULL);
 461                 while (state == FLDPLUS) {
 462                     bufsz = sizeof buf;
 463                     state = m_getfld (&gstate, name, buf, &bufsz, fp);
 464                     cp = add (buf, cp);
 465                 }
 466                 for (bp = cp; isspace (*bp); bp++)
 467                     continue;
 468                 for (dp = bp; istoken (*dp); dp++)
 469                     continue;
 470                 *dp = '\0';
 471                 result = (mh_strcasecmp (bp, "7bit")
 472                        && mh_strcasecmp (bp, "8bit")
 473                        && mh_strcasecmp (bp, "binary"));
 474
 475                 free (cp);
 476                 if (result) {
 477                     fclose (fp);
 478                     return result;
 479                 }
 480                 break;
 481             }
 482
 483             /*
 484              * Just skip the rest of this header
 485              * field and go to next one.
 486              */
 487             while (state == FLDPLUS) {
 488                 bufsz = sizeof buf;
 489                 state = m_getfld (&gstate, name, buf, &bufsz, fp);
 490             }
 491             break;
 492
 493             /*
 494              * We've passed the message header,
 495              * so message is just text.
 496              */
 497         default:
 498             fclose (fp);
 499             return 0;
 500         }
 501     }
 502     m_getfld_state_destroy (&gstate);
 503 }