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 static struct swit switches[] = {
  15 #define CHECKMIMESW          0
  16     { "checkmime", 0 },
  17 #define NOCHECKMIMESW        1
  18     { "nocheckmime", 0 },
  19 #define HEADSW               2
  20     { "header", 0 },
  21 #define NHEADSW              3
  22     { "noheader", 0 },
  23 #define FORMSW               4
  24     { "form formfile", 0 },
  25 #define PROGSW               5
  26     { "moreproc program", 0 },
  27 #define NPROGSW              6
  28     { "nomoreproc", 0 },
  29 #define LENSW                7
  30     { "length lines", 0 },
  31 #define WIDTHSW              8
  32     { "width columns", 0 },
  33 #define SHOWSW               9
  34     { "showproc program", 0 },
  35 #define SHOWMIMESW          10
  36     { "showmimeproc program", 0 },
  37 #define NSHOWSW             11
  38     { "noshowproc", 0 },
  39 #define DRFTSW              12
  40     { "draft", 0 },
  41 #define FILESW              13
  42     { "file file", -4 },                /* interface from showfile */
  43 #define FMTPROCSW           14
  44     { "fmtproc program", 0 },
  45 #define NFMTPROCSW          15
  46     { "nofmtproc", 0 },
  47 #define VERSIONSW           16
  48     { "version", 0 },
  49 #define HELPSW              17
  50     { "help", 0 },
  51     { NULL, 0 }
  52 };
  53
  54 /*
  55  * static prototypes
  56  */
  57 static int is_nontext(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;
  68     int nshow = 0, checkmime = 1, mime;
  69     int isdf = 0, mode = SHOW, msgnum;
  70     char *cp, *maildir, *file = NULL, *folder = NULL, *proc;
  71     char buf[BUFSIZ], **argp, **arguments;
  72     struct msgs *mp = NULL;
  73     struct msgs_array msgs = { 0, 0, NULL };
  74     struct msgs_array vec = { 0, 0, NULL };
  75
  76 #ifdef LOCALE
  77     setlocale(LC_ALL, "");
  78 #endif
  79     invo_name = r1bindex (argv[0], '/');
  80
  81     app_msgarg(&vec, NULL);  /* placeholder, filled later with proc name */
  82
  83     /* read user profile/context */
  84     context_read();
  85
  86     if (!mh_strcasecmp (invo_name, "next")) {
  87         mode = NEXT;
  88     } else if (!mh_strcasecmp (invo_name, "prev")) {
  89         mode = PREV;
  90     }
  91     arguments = getarguments (invo_name, argc, argv, 1);
  92     argp = arguments;
  93
  94     while ((cp = *argp++)) {
  95         if (*cp == '-') {
  96             switch (smatch (++cp, switches)) {
  97                 case AMBIGSW:
  98                     ambigsw (cp, switches);
  99                     done (1);
 100                 case UNKWNSW:
 101                 case NPROGSW:
 102                 case NFMTPROCSW:
 103                     app_msgarg(&vec, --cp);
 104                     continue;
 105
 106                 case HELPSW:
 107                     snprintf (buf, sizeof(buf),
 108                         "%s [+folder] %s[switches] [switches for showproc]",
 109                         invo_name, mode == SHOW ? "[msgs] ": "");
 110                     print_help (buf, switches, 1);
 111                     done (0);
 112                 case VERSIONSW:
 113                     print_version(invo_name);
 114                     done (0);
 115
 116                 case DRFTSW:
 117                     if (file)
 118                         adios (NULL, "only one file at a time!");
 119                     draftsw++;
 120                     if (mode == SHOW)
 121                         continue;
 122 usage:
 123                     adios (NULL,
 124                             "usage: %s [+folder] [switches] [switches for showproc]",
 125                             invo_name);
 126                 case FILESW:
 127                     if (mode != SHOW)
 128                         goto usage;
 129                     if (draftsw || file)
 130                         adios (NULL, "only one file at a time!");
 131                     if (!(cp = *argp++) || *cp == '-')
 132                         adios (NULL, "missing argument to %s", argp[-2]);
 133                     file = path (cp, TFILE);
 134                     continue;
 135
 136                 case HEADSW:
 137                     headersw++;
 138                     continue;
 139                 case NHEADSW:
 140                     headersw = 0;
 141                     continue;
 142
 143                 case FORMSW:
 144                     app_msgarg(&vec, --cp);
 145                     if (!(cp = *argp++) || *cp == '-')
 146                         adios (NULL, "missing argument to %s", argp[-2]);
 147                     app_msgarg(&vec, getcpy (etcpath(cp)));
 148                     continue;
 149
 150                 case PROGSW:
 151                 case LENSW:
 152                 case WIDTHSW:
 153                 case FMTPROCSW:
 154                     app_msgarg(&vec, --cp);
 155                     if (!(cp = *argp++) || *cp == '-')
 156                         adios (NULL, "missing argument to %s", argp[-2]);
 157                     app_msgarg(&vec, cp);
 158                     continue;
 159
 160                 case SHOWSW:
 161                     if (!(showproc = *argp++) || *showproc == '-')
 162                         adios (NULL, "missing argument to %s", argp[-2]);
 163                     nshow = 0;
 164                     continue;
 165                 case NSHOWSW:
 166                     nshow++;
 167                     continue;
 168
 169                 case SHOWMIMESW:
 170                     if (!(showmimeproc = *argp++) || *showmimeproc == '-')
 171                         adios (NULL, "missing argument to %s", argp[-2]);
 172                     nshow = 0;
 173                     continue;
 174                 case CHECKMIMESW:
 175                     checkmime++;
 176                     continue;
 177                 case NOCHECKMIMESW:
 178                     checkmime = 0;
 179                     continue;
 180             }
 181         }
 182         if (*cp == '+' || *cp == '@') {
 183             if (folder)
 184                 adios (NULL, "only one folder at a time!");
 185             else
 186                 folder = pluspath (cp);
 187         } else {
 188             if (mode != SHOW)
 189                 goto usage;
 190             else
 191                 app_msgarg(&msgs, cp);
 192         }
 193     }
 194
 195     if (!context_find ("path"))
 196         free (path ("./", TFOLDER));
 197
 198     if (draftsw || file) {
 199         if (msgs.size)
 200             adios (NULL, "only one file at a time!");
 201         if (draftsw)
 202             app_msgarg(&vec, getcpy (m_draft (folder, NULL, 1, &isdf)));
 203         else
 204             app_msgarg(&vec, file);
 205         goto go_to_it;
 206     }
 207
 208 #ifdef WHATNOW
 209     if (!msgs.size && !folder && mode == SHOW && (cp = getenv ("mhdraft")) && *cp) {
 210         draftsw++;
 211         app_msgarg(&vec, cp);
 212         goto go_to_it;
 213     }
 214 #endif /* WHATNOW */
 215
 216     if (!msgs.size) {
 217         switch (mode) {
 218             case NEXT:
 219                 app_msgarg(&msgs, "next");
 220                 break;
 221             case PREV:
 222                 app_msgarg(&msgs, "prev");
 223                 break;
 224             default:
 225                 app_msgarg(&msgs, "cur");
 226                 break;
 227         }
 228     }
 229
 230     if (!folder)
 231         folder = getfolder (1);
 232     maildir = m_maildir (folder);
 233
 234     if (chdir (maildir) == NOTOK)
 235         adios (maildir, "unable to change directory to");
 236
 237     /* read folder and create message structure */
 238     if (!(mp = folder_read (folder)))
 239         adios (NULL, "unable to read folder %s", folder);
 240
 241     /* check for empty folder */
 242     if (mp->nummsg == 0)
 243         adios (NULL, "no messages in %s", folder);
 244
 245     /* parse all the message ranges/sequences and set SELECTED */
 246     for (msgnum = 0; msgnum < msgs.size; msgnum++)
 247         if (!m_convert (mp, msgs.msgs[msgnum]))
 248             done (1);
 249
 250     /*
 251      * Set the SELECT_UNSEEN bit for all the SELECTED messages,
 252      * since we will use that as a tag to know which messages
 253      * to remove from the "unseen" sequence.
 254      */
 255     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 256         if (is_selected(mp, msgnum))
 257             set_unseen (mp, msgnum);
 258
 259     seq_setprev (mp);           /* set the Previous-Sequence */
 260     seq_setunseen (mp, 1);      /* unset the Unseen-Sequence */
 261
 262     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 263         if (is_selected(mp, msgnum))
 264             app_msgarg(&vec, getcpy (m_name (msgnum)));
 265
 266     seq_setcur (mp, mp->hghsel);        /* update current message  */
 267     seq_save (mp);                      /* synchronize sequences   */
 268     context_replace (pfolder, folder);  /* update current folder   */
 269     context_save ();                    /* save the context file   */
 270
 271     if (headersw && vec.size == 2)
 272         printf ("(Message %s:%s)\n", folder, vec.msgs[1]);
 273
 274 go_to_it: ;
 275     fflush (stdout);
 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) {
 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.msgs[vec.size - 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     if (strcmp (r1bindex (proc, '/'), "mhn") == 0) {
 311         /* Add "-file" if showing file or draft, */
 312         if (draftsw || file) {
 313             app_msgarg(&vec, vec.msgs[vec.size - 1]);
 314             vec.msgs[vec.size - 2] = "-file";
 315         }
 316         /* and add -show for backward compatibility */
 317         app_msgarg(&vec, "-show");
 318     } else if (strcmp (r1bindex (proc, '/'), "mhshow") == 0) {
 319         /* If "mhshow", add "-file" if showing file or draft. */
 320         if (draftsw || file) {
 321             app_msgarg(&vec, vec.msgs[vec.size - 1]);
 322             vec.msgs[vec.size - 2] = "-file";
 323         }
 324     } else if (strcmp (r1bindex (proc, '/'), "mhl") == 0) {
 325         /* If "mhl", then run it internally */
 326         vec.msgs[0] = "mhl";
 327         app_msgarg(&vec, NULL);
 328         mhl (vec.size, vec.msgs);
 329         done (0);
 330     }
 331
 332     vec.msgs[0] = r1bindex (proc, '/');
 333     app_msgarg(&vec, NULL);
 334     execvp (proc, vec.msgs);
 335     adios (proc, "unable to exec");
 336     return 0;  /* dead code to satisfy the compiler */
 337 }
 338
 339
 340 /*
 341  * Check if a message or file contains any non-text parts
 342  */
 343 static int
 344 is_nontext (char *msgnam)
 345 {
 346     int result, state;
 347     unsigned char *bp, *dp;
 348     char *cp;
 349     char buf[BUFSIZ], name[NAMESZ];
 350     FILE *fp;
 351
 352     if ((fp = fopen (msgnam, "r")) == NULL)
 353         return 0;
 354
 355     for (state = FLD;;) {
 356         switch (state = m_getfld (state, name, buf, sizeof(buf), fp)) {
 357         case FLD:
 358         case FLDPLUS:
 359         case FLDEOF:
 360             /*
 361              * Check Content-Type field
 362              */
 363             if (!mh_strcasecmp (name, TYPE_FIELD)) {
 364                 int passno;
 365                 char c;
 366
 367                 cp = add (buf, NULL);
 368                 while (state == FLDPLUS) {
 369                     state = m_getfld (state, name, buf, sizeof(buf), fp);
 370                     cp = add (buf, cp);
 371                 }
 372                 bp = cp;
 373                 passno = 1;
 374
 375 again:
 376                 for (; isspace (*bp); bp++)
 377                     continue;
 378                 if (*bp == '(') {
 379                     int i;
 380
 381                     for (bp++, i = 0;;) {
 382                         switch (*bp++) {
 383                         case '\0':
 384 invalid:
 385                             result = 0;
 386                             goto out;
 387                         case '\\':
 388                             if (*bp++ == '\0')
 389                                 goto invalid;
 390                             continue;
 391                         case '(':
 392                             i++;
 393                             /* and fall... */
 394                         default:
 395                             continue;
 396                         case ')':
 397                             if (--i < 0)
 398                                 break;
 399                             continue;
 400                         }
 401                         break;
 402                     }
 403                 }
 404                 if (passno == 2) {
 405                     if (*bp != '/')
 406                         goto invalid;
 407                     bp++;
 408                     passno = 3;
 409                     goto again;
 410                 }
 411                 for (dp = bp; istoken (*dp); dp++)
 412                     continue;
 413                 c = *dp;
 414                 *dp = '\0';
 415                 if (!*bp)
 416                     goto invalid;
 417                 if (passno > 1) {
 418                     if ((result = (mh_strcasecmp (bp, "plain") != 0)))
 419                         goto out;
 420                     *dp = c;
 421                     for (dp++; isspace (*dp); dp++)
 422                         continue;
 423                     if (*dp) {
 424                         if ((result = !uprf (dp, "charset")))
 425                             goto out;
 426                         dp += sizeof("charset") - 1;
 427                         while (isspace (*dp))
 428                             dp++;
 429                         if (*dp++ != '=')
 430                             goto invalid;
 431                         while (isspace (*dp))
 432                             dp++;
 433                         if (*dp == '"') {
 434                             if ((bp = strchr(++dp, '"')))
 435                                 *bp = '\0';
 436                         } else {
 437                             for (bp = dp; *bp; bp++)
 438                                 if (!istoken (*bp)) {
 439                                     *bp = '\0';
 440                                     break;
 441                                 }
 442                         }
 443                     } else {
 444                         /* Default character set */
 445                         dp = "US-ASCII";
 446                     }
 447                     /* Check the character set */
 448                     result = !check_charset (dp, strlen (dp));
 449                 } else {
 450                     if (!(result = (mh_strcasecmp (bp, "text") != 0))) {
 451                         *dp = c;
 452                         bp = dp;
 453                         passno = 2;
 454                         goto again;
 455                     }
 456                 }
 457 out:
 458                 free (cp);
 459                 if (result) {
 460                     fclose (fp);
 461                     return result;
 462                 }
 463                 break;
 464             }
 465
 466             /*
 467              * Check Content-Transfer-Encoding field
 468              */
 469             if (!mh_strcasecmp (name, ENCODING_FIELD)) {
 470                 cp = add (buf, NULL);
 471                 while (state == FLDPLUS) {
 472                     state = m_getfld (state, name, buf, sizeof(buf), fp);
 473                     cp = add (buf, cp);
 474                 }
 475                 for (bp = cp; isspace (*bp); bp++)
 476                     continue;
 477                 for (dp = bp; istoken (*dp); dp++)
 478                     continue;
 479                 *dp = '\0';
 480                 result = (mh_strcasecmp (bp, "7bit")
 481                        && mh_strcasecmp (bp, "8bit")
 482                        && mh_strcasecmp (bp, "binary"));
 483
 484                 free (cp);
 485                 if (result) {
 486                     fclose (fp);
 487                     return result;
 488                 }
 489                 break;
 490             }
 491
 492             /*
 493              * Just skip the rest of this header
 494              * field and go to next one.
 495              */
 496             while (state == FLDPLUS)
 497                 state = m_getfld (state, name, buf, sizeof(buf), fp);
 498             break;
 499
 500             /*
 501              * We've passed the message header,
 502              * so message is just text.
 503              */
 504         default:
 505             fclose (fp);
 506             return 0;
 507         }
 508     }
 509 }