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      * switches for mhlproc     \
  35      */                         \
  36     X("concat", -6, CONCATSW) \
  37     X("noconcat", -8, NCONCATSW) \
  38
  39 #define X(sw, minchars, id) id,
  40 DEFINE_SWITCH_ENUM(SHOW);
  41 #undef X
  42
  43 #define X(sw, minchars, id) { sw, minchars, id },
  44 DEFINE_SWITCH_ARRAY(SHOW, switches);
  45 #undef X
  46
  47 /*
  48  * static prototypes
  49  */
  50 static int is_nontext(char *);
  51
  52 #define SHOW  0
  53 #define NEXT  1
  54 #define PREV  2
  55
  56
  57 int
  58 main (int argc, char **argv)
  59 {
  60     int draftsw = 0, headersw = 1;
  61     int nshow = 0, checkmime = 1, mime = 0;
  62     int isdf = 0, mode = SHOW, msgnum;
  63     char *cp, *maildir, *file = NULL, *folder = NULL, *proc, *program;
  64     char buf[BUFSIZ], **argp, **arguments;
  65     struct msgs *mp = NULL;
  66     struct msgs_array msgs = { 0, 0, NULL };
  67     struct msgs_array vec = { 0, 0, NULL };
  68
  69     if (nmh_init(argv[0], 1)) { return 1; }
  70
  71     if (!strcasecmp (invo_name, "next")) {
  72         mode = NEXT;
  73     } else if (!strcasecmp (invo_name, "prev")) {
  74         mode = PREV;
  75     }
  76     arguments = getarguments (invo_name, argc, argv, 1);
  77     argp = arguments;
  78
  79     while ((cp = *argp++)) {
  80         if (*cp == '-') {
  81             switch (smatch (++cp, switches)) {
  82                 case AMBIGSW:
  83                     ambigsw (cp, switches);
  84                     done (1);
  85
  86                 case CONCATSW:
  87                 case NCONCATSW:
  88                     /* Use showmimeproc if one of these switches was
  89                        specified because mhl doesn't understand them. */
  90                     mime = 1;
  91                     /* fall thru */
  92                 case UNKWNSW:
  93                 case NPROGSW:
  94                 case NFMTPROCSW:
  95                     app_msgarg(&vec, --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 (0);
 104                 case VERSIONSW:
 105                     print_version(invo_name);
 106                     done (0);
 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                     app_msgarg(&vec, --cp);
 137                     if (!(cp = *argp++) || *cp == '-')
 138                         adios (NULL, "missing argument to %s", argp[-2]);
 139                     app_msgarg(&vec, getcpy (etcpath(cp)));
 140                     continue;
 141
 142                 case PROGSW:
 143                 case LENSW:
 144                 case WIDTHSW:
 145                 case FMTPROCSW:
 146                     app_msgarg(&vec, --cp);
 147                     if (!(cp = *argp++) || *cp == '-')
 148                         adios (NULL, "missing argument to %s", argp[-2]);
 149                     app_msgarg(&vec, cp);
 150                     continue;
 151
 152                 case SHOWSW:
 153                     if (!(showproc = *argp++) || *showproc == '-')
 154                         adios (NULL, "missing argument to %s", argp[-2]);
 155                     nshow = 0;
 156                     continue;
 157                 case NSHOWSW:
 158                     nshow++;
 159                     continue;
 160
 161                 case SHOWMIMESW:
 162                     if (!(showmimeproc = *argp++) || *showmimeproc == '-')
 163                         adios (NULL, "missing argument to %s", argp[-2]);
 164                     nshow = 0;
 165                     continue;
 166                 case CHECKMIMESW:
 167                     checkmime++;
 168                     continue;
 169                 case NOCHECKMIMESW:
 170                     checkmime = 0;
 171                     continue;
 172             }
 173         }
 174         if (*cp == '+' || *cp == '@') {
 175             if (folder)
 176                 adios (NULL, "only one folder at a time!");
 177             else
 178                 folder = pluspath (cp);
 179         } else {
 180             if (mode != SHOW)
 181                 goto usage;
 182             else
 183                 app_msgarg(&msgs, cp);
 184         }
 185     }
 186
 187     if (!context_find ("path"))
 188         free (path ("./", TFOLDER));
 189
 190     if (draftsw || file) {
 191         if (msgs.size)
 192             adios (NULL, "only one file at a time!");
 193         if (draftsw)
 194             app_msgarg(&vec, getcpy (m_draft (folder, NULL, 1, &isdf)));
 195         else
 196             app_msgarg(&vec, file);
 197         goto go_to_it;
 198     }
 199
 200     if (!msgs.size) {
 201         switch (mode) {
 202             case NEXT:
 203                 app_msgarg(&msgs, "next");
 204                 break;
 205             case PREV:
 206                 app_msgarg(&msgs, "prev");
 207                 break;
 208             default:
 209                 app_msgarg(&msgs, "cur");
 210                 break;
 211         }
 212     }
 213
 214     if (!folder)
 215         folder = getfolder (1);
 216     maildir = m_maildir (folder);
 217
 218     if (chdir (maildir) == NOTOK)
 219         adios (maildir, "unable to change directory to");
 220
 221     /* read folder and create message structure */
 222     if (!(mp = folder_read (folder, 1)))
 223         adios (NULL, "unable to read folder %s", folder);
 224
 225     /* check for empty folder */
 226     if (mp->nummsg == 0)
 227         adios (NULL, "no messages in %s", folder);
 228
 229     /* parse all the message ranges/sequences and set SELECTED */
 230     for (msgnum = 0; msgnum < msgs.size; msgnum++)
 231         if (!m_convert (mp, msgs.msgs[msgnum]))
 232             done (1);
 233
 234     /*
 235      * Set the SELECT_UNSEEN bit for all the SELECTED messages,
 236      * since we will use that as a tag to know which messages
 237      * to remove from the "unseen" sequence.
 238      */
 239     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 240         if (is_selected(mp, msgnum))
 241             set_unseen (mp, msgnum);
 242
 243     seq_setprev (mp);           /* set the Previous-Sequence */
 244     seq_setunseen (mp, 1);      /* unset the Unseen-Sequence */
 245
 246     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 247         if (is_selected(mp, msgnum))
 248             app_msgarg(&vec, getcpy (m_name (msgnum)));
 249
 250     seq_setcur (mp, mp->hghsel);        /* update current message  */
 251     seq_save (mp);                      /* synchronize sequences   */
 252     context_replace (pfolder, folder);  /* update current folder   */
 253     context_save ();                    /* save the context file   */
 254
 255     if (headersw && vec.size == 1)
 256         printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 257
 258 go_to_it: ;
 259     fflush (stdout);
 260
 261     /*
 262      * Decide which "proc" to use
 263      */
 264     if (nshow) {
 265         proc = catproc;
 266     } else {
 267         /* check if any messages are non-text MIME messages */
 268         if (! mime  &&  checkmime) {
 269             if (!draftsw && !file) {
 270                 /* loop through selected messages and check for MIME */
 271                 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 272                     if (is_selected (mp, msgnum) && is_nontext (m_name (msgnum))) {
 273                         mime = 1;
 274                         break;
 275                     }
 276             } else {
 277                 /* check the file or draft for MIME */
 278                 if (is_nontext (vec.msgs[vec.size - 1]))
 279                     mime = 1;
 280             }
 281         }
 282
 283         /* Set the "proc" */
 284         if (mime)
 285             proc = showmimeproc;
 286         else
 287             proc = showproc;
 288     }
 289
 290     if (folder && !draftsw && !file)
 291         m_putenv ("mhfolder", folder);
 292
 293     if (strcmp (r1bindex (proc, '/'), "mhn") == 0) {
 294         /* Add "-file" if showing file or draft, */
 295         if (draftsw || file) {
 296             app_msgarg(&vec, vec.msgs[vec.size - 1]);
 297             vec.msgs[vec.size - 2] = "-file";
 298         }
 299         /* and add -show for backward compatibility */
 300         app_msgarg(&vec, "-show");
 301     } else if (strcmp (r1bindex (proc, '/'), "mhshow") == 0) {
 302         /* If "mhshow", add "-file" if showing file or draft. */
 303         if (draftsw || file) {
 304             app_msgarg(&vec, vec.msgs[vec.size - 1]);
 305             vec.msgs[vec.size - 2] = "-file";
 306         }
 307     } else if (strcmp (r1bindex (proc, '/'), "mhl") == 0) {
 308         /* If "mhl", then run it internally */
 309         argsplit_insert(&vec, "mhl", &program);
 310         app_msgarg(&vec, NULL);
 311         mhl (vec.size, vec.msgs);
 312         done (0);
 313     }
 314
 315     argsplit_insert(&vec, proc, &program);
 316     app_msgarg(&vec, NULL);
 317     execvp (program, vec.msgs);
 318     adios (proc, "unable to exec");
 319     return 0;  /* dead code to satisfy the compiler */
 320 }
 321
 322
 323 /*
 324  * Check if a message or file contains any non-text parts
 325  */
 326 static int
 327 is_nontext (char *msgnam)
 328 {
 329     int result, state;
 330     char *bp, *dp, *cp;
 331     char buf[BUFSIZ], name[NAMESZ];
 332     FILE *fp;
 333     m_getfld_state_t gstate = 0;
 334
 335     if ((fp = fopen (msgnam, "r")) == NULL)
 336         return 0;
 337
 338     for (;;) {
 339         int bufsz = sizeof buf;
 340         switch (state = m_getfld (&gstate, name, buf, &bufsz, fp)) {
 341         case FLD:
 342         case FLDPLUS:
 343             /*
 344              * Check Content-Type field
 345              */
 346             if (!strcasecmp (name, TYPE_FIELD)) {
 347                 int passno;
 348                 char c;
 349
 350                 cp = add (buf, NULL);
 351                 while (state == FLDPLUS) {
 352                     bufsz = sizeof buf;
 353                     state = m_getfld (&gstate, name, buf, &bufsz, fp);
 354                     cp = add (buf, cp);
 355                 }
 356                 bp = cp;
 357                 passno = 1;
 358
 359 again:
 360                 for (; isspace ((unsigned char) *bp); bp++)
 361                     continue;
 362                 if (*bp == '(') {
 363                     int i;
 364
 365                     for (bp++, i = 0;;) {
 366                         switch (*bp++) {
 367                         case '\0':
 368 invalid:
 369                             result = 0;
 370                             goto out;
 371                         case '\\':
 372                             if (*bp++ == '\0')
 373                                 goto invalid;
 374                             continue;
 375                         case '(':
 376                             i++;
 377                             /* and fall... */
 378                         default:
 379                             continue;
 380                         case ')':
 381                             if (--i < 0)
 382                                 break;
 383                             continue;
 384                         }
 385                         break;
 386                     }
 387                 }
 388                 if (passno == 2) {
 389                     if (*bp != '/')
 390                         goto invalid;
 391                     bp++;
 392                     passno = 3;
 393                     goto again;
 394                 }
 395                 for (dp = bp; istoken (*dp); dp++)
 396                     continue;
 397                 c = *dp;
 398                 *dp = '\0';
 399                 if (!*bp)
 400                     goto invalid;
 401                 if (passno > 1) {
 402                     if ((result = (strcasecmp (bp, "plain") != 0)))
 403                         goto out;
 404                     *dp = c;
 405                     for (dp++; isspace ((unsigned char) *dp); dp++)
 406                         continue;
 407                     if (*dp) {
 408                         if ((result = !uprf (dp, "charset")))
 409                             goto out;
 410                         dp += sizeof("charset") - 1;
 411                         while (isspace ((unsigned char) *dp))
 412                             dp++;
 413                         if (*dp++ != '=')
 414                             goto invalid;
 415                         while (isspace ((unsigned char) *dp))
 416                             dp++;
 417                         if (*dp == '"') {
 418                             if ((bp = strchr(++dp, '"')))
 419                                 *bp = '\0';
 420                         } else {
 421                             for (bp = dp; *bp; bp++)
 422                                 if (!istoken (*bp)) {
 423                                     *bp = '\0';
 424                                     break;
 425                                 }
 426                         }
 427                     } else {
 428                         /* Default character set */
 429                         dp = "US-ASCII";
 430                     }
 431                     /* Check the character set */
 432                     result = !check_charset (dp, strlen (dp));
 433                 } else {
 434                     if (!(result = (strcasecmp (bp, "text") != 0))) {
 435                         *dp = c;
 436                         bp = dp;
 437                         passno = 2;
 438                         goto again;
 439                     }
 440                 }
 441 out:
 442                 free (cp);
 443                 if (result) {
 444                     fclose (fp);
 445                     m_getfld_state_destroy (&gstate);
 446                     return result;
 447                 }
 448                 break;
 449             }
 450
 451             /*
 452              * Check Content-Transfer-Encoding field
 453              */
 454             if (!strcasecmp (name, ENCODING_FIELD)) {
 455                 cp = add (buf, NULL);
 456                 while (state == FLDPLUS) {
 457                     bufsz = sizeof buf;
 458                     state = m_getfld (&gstate, name, buf, &bufsz, fp);
 459                     cp = add (buf, cp);
 460                 }
 461                 for (bp = cp; isspace ((unsigned char) *bp); bp++)
 462                     continue;
 463                 for (dp = bp; istoken ((unsigned char) *dp); dp++)
 464                     continue;
 465                 *dp = '\0';
 466                 result = (strcasecmp (bp, "7bit")
 467                        && strcasecmp (bp, "8bit")
 468                        && strcasecmp (bp, "binary"));
 469
 470                 free (cp);
 471                 if (result) {
 472                     fclose (fp);
 473                     m_getfld_state_destroy (&gstate);
 474                     return result;
 475                 }
 476                 break;
 477             }
 478
 479             /*
 480              * Just skip the rest of this header
 481              * field and go to next one.
 482              */
 483             while (state == FLDPLUS) {
 484                 bufsz = sizeof buf;
 485                 state = m_getfld (&gstate, name, buf, &bufsz, fp);
 486             }
 487             break;
 488
 489             /*
 490              * We've passed the message header,
 491              * so message is just text.
 492              */
 493         default:
 494             fclose (fp);
 495             m_getfld_state_destroy (&gstate);
 496             return 0;
 497         }
 498     }
 499 }