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, *program;
  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     if (nmh_init(argv[0], 1)) { return 1; }
  65
  66     if (!strcasecmp (invo_name, "next")) {
  67         mode = NEXT;
  68     } else if (!strcasecmp (invo_name, "prev")) {
  69         mode = PREV;
  70     }
  71     arguments = getarguments (invo_name, argc, argv, 1);
  72     argp = arguments;
  73
  74     while ((cp = *argp++)) {
  75         if (*cp == '-') {
  76             switch (smatch (++cp, switches)) {
  77                 case AMBIGSW:
  78                     ambigsw (cp, switches);
  79                     done (1);
  80                 case UNKWNSW:
  81                 case NPROGSW:
  82                 case NFMTPROCSW:
  83                     app_msgarg(&vec, --cp);
  84                     continue;
  85
  86                 case HELPSW:
  87                     snprintf (buf, sizeof(buf),
  88                         "%s [+folder] %s[switches] [switches for showproc]",
  89                         invo_name, mode == SHOW ? "[msgs] ": "");
  90                     print_help (buf, switches, 1);
  91                     done (0);
  92                 case VERSIONSW:
  93                     print_version(invo_name);
  94                     done (0);
  95
  96                 case DRFTSW:
  97                     if (file)
  98                         adios (NULL, "only one file at a time!");
  99                     draftsw++;
 100                     if (mode == SHOW)
 101                         continue;
 102 usage:
 103                     adios (NULL,
 104                             "usage: %s [+folder] [switches] [switches for showproc]",
 105                             invo_name);
 106                 case FILESW:
 107                     if (mode != SHOW)
 108                         goto usage;
 109                     if (draftsw || file)
 110                         adios (NULL, "only one file at a time!");
 111                     if (!(cp = *argp++) || *cp == '-')
 112                         adios (NULL, "missing argument to %s", argp[-2]);
 113                     file = path (cp, TFILE);
 114                     continue;
 115
 116                 case HEADSW:
 117                     headersw++;
 118                     continue;
 119                 case NHEADSW:
 120                     headersw = 0;
 121                     continue;
 122
 123                 case FORMSW:
 124                     app_msgarg(&vec, --cp);
 125                     if (!(cp = *argp++) || *cp == '-')
 126                         adios (NULL, "missing argument to %s", argp[-2]);
 127                     app_msgarg(&vec, getcpy (etcpath(cp)));
 128                     continue;
 129
 130                 case PROGSW:
 131                 case LENSW:
 132                 case WIDTHSW:
 133                 case FMTPROCSW:
 134                     app_msgarg(&vec, --cp);
 135                     if (!(cp = *argp++) || *cp == '-')
 136                         adios (NULL, "missing argument to %s", argp[-2]);
 137                     app_msgarg(&vec, cp);
 138                     continue;
 139
 140                 case SHOWSW:
 141                     if (!(showproc = *argp++) || *showproc == '-')
 142                         adios (NULL, "missing argument to %s", argp[-2]);
 143                     nshow = 0;
 144                     continue;
 145                 case NSHOWSW:
 146                     nshow++;
 147                     continue;
 148
 149                 case SHOWMIMESW:
 150                     if (!(showmimeproc = *argp++) || *showmimeproc == '-')
 151                         adios (NULL, "missing argument to %s", argp[-2]);
 152                     nshow = 0;
 153                     continue;
 154                 case CHECKMIMESW:
 155                     checkmime++;
 156                     continue;
 157                 case NOCHECKMIMESW:
 158                     checkmime = 0;
 159                     continue;
 160             }
 161         }
 162         if (*cp == '+' || *cp == '@') {
 163             if (folder)
 164                 adios (NULL, "only one folder at a time!");
 165             else
 166                 folder = pluspath (cp);
 167         } else {
 168             if (mode != SHOW)
 169                 goto usage;
 170             else
 171                 app_msgarg(&msgs, cp);
 172         }
 173     }
 174
 175     if (!context_find ("path"))
 176         free (path ("./", TFOLDER));
 177
 178     if (draftsw || file) {
 179         if (msgs.size)
 180             adios (NULL, "only one file at a time!");
 181         if (draftsw)
 182             app_msgarg(&vec, getcpy (m_draft (folder, NULL, 1, &isdf)));
 183         else
 184             app_msgarg(&vec, file);
 185         goto go_to_it;
 186     }
 187
 188     if (!msgs.size) {
 189         switch (mode) {
 190             case NEXT:
 191                 app_msgarg(&msgs, "next");
 192                 break;
 193             case PREV:
 194                 app_msgarg(&msgs, "prev");
 195                 break;
 196             default:
 197                 app_msgarg(&msgs, "cur");
 198                 break;
 199         }
 200     }
 201
 202     if (!folder)
 203         folder = getfolder (1);
 204     maildir = m_maildir (folder);
 205
 206     if (chdir (maildir) == NOTOK)
 207         adios (maildir, "unable to change directory to");
 208
 209     /* read folder and create message structure */
 210     if (!(mp = folder_read (folder, 1)))
 211         adios (NULL, "unable to read folder %s", folder);
 212
 213     /* check for empty folder */
 214     if (mp->nummsg == 0)
 215         adios (NULL, "no messages in %s", folder);
 216
 217     /* parse all the message ranges/sequences and set SELECTED */
 218     for (msgnum = 0; msgnum < msgs.size; msgnum++)
 219         if (!m_convert (mp, msgs.msgs[msgnum]))
 220             done (1);
 221
 222     /*
 223      * Set the SELECT_UNSEEN bit for all the SELECTED messages,
 224      * since we will use that as a tag to know which messages
 225      * to remove from the "unseen" sequence.
 226      */
 227     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 228         if (is_selected(mp, msgnum))
 229             set_unseen (mp, msgnum);
 230
 231     seq_setprev (mp);           /* set the Previous-Sequence */
 232     seq_setunseen (mp, 1);      /* unset the Unseen-Sequence */
 233
 234     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 235         if (is_selected(mp, msgnum))
 236             app_msgarg(&vec, getcpy (m_name (msgnum)));
 237
 238     seq_setcur (mp, mp->hghsel);        /* update current message  */
 239     seq_save (mp);                      /* synchronize sequences   */
 240     context_replace (pfolder, folder);  /* update current folder   */
 241     context_save ();                    /* save the context file   */
 242
 243     if (headersw && vec.size == 1)
 244         printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 245
 246 go_to_it: ;
 247     fflush (stdout);
 248
 249     /*
 250      * Decide which "proc" to use
 251      */
 252     mime = 0;
 253     if (nshow) {
 254         proc = catproc;
 255     } else {
 256         /* check if any messages are non-text MIME messages */
 257         if (checkmime) {
 258             if (!draftsw && !file) {
 259                 /* loop through selected messages and check for MIME */
 260                 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 261                     if (is_selected (mp, msgnum) && is_nontext (m_name (msgnum))) {
 262                         mime = 1;
 263                         break;
 264                     }
 265             } else {
 266                 /* check the file or draft for MIME */
 267                 if (is_nontext (vec.msgs[vec.size - 1]))
 268                     mime = 1;
 269             }
 270         }
 271
 272         /* Set the "proc" */
 273         if (mime)
 274             proc = showmimeproc;
 275         else
 276             proc = showproc;
 277     }
 278
 279     if (folder && !draftsw && !file)
 280         m_putenv ("mhfolder", folder);
 281
 282     if (strcmp (r1bindex (proc, '/'), "mhn") == 0) {
 283         /* Add "-file" if showing file or draft, */
 284         if (draftsw || file) {
 285             app_msgarg(&vec, vec.msgs[vec.size - 1]);
 286             vec.msgs[vec.size - 2] = "-file";
 287         }
 288         /* and add -show for backward compatibility */
 289         app_msgarg(&vec, "-show");
 290     } else if (strcmp (r1bindex (proc, '/'), "mhshow") == 0) {
 291         /* If "mhshow", add "-file" if showing file or draft. */
 292         if (draftsw || file) {
 293             app_msgarg(&vec, vec.msgs[vec.size - 1]);
 294             vec.msgs[vec.size - 2] = "-file";
 295         }
 296     } else if (strcmp (r1bindex (proc, '/'), "mhl") == 0) {
 297         /* If "mhl", then run it internally */
 298         argsplit_insert(&vec, "mhl", &program);
 299         app_msgarg(&vec, NULL);
 300         mhl (vec.size, vec.msgs);
 301         done (0);
 302     }
 303
 304     argsplit_insert(&vec, proc, &program);
 305     app_msgarg(&vec, NULL);
 306     execvp (program, vec.msgs);
 307     adios (proc, "unable to exec");
 308     return 0;  /* dead code to satisfy the compiler */
 309 }
 310
 311
 312 /*
 313  * Check if a message or file contains any non-text parts
 314  */
 315 static int
 316 is_nontext (char *msgnam)
 317 {
 318     int result, state;
 319     char *bp, *dp, *cp;
 320     char buf[BUFSIZ], name[NAMESZ];
 321     FILE *fp;
 322     m_getfld_state_t gstate = 0;
 323
 324     if ((fp = fopen (msgnam, "r")) == NULL)
 325         return 0;
 326
 327     for (;;) {
 328         int bufsz = sizeof buf;
 329         switch (state = m_getfld (&gstate, name, buf, &bufsz, fp)) {
 330         case FLD:
 331         case FLDPLUS:
 332             /*
 333              * Check Content-Type field
 334              */
 335             if (!strcasecmp (name, TYPE_FIELD)) {
 336                 int passno;
 337                 char c;
 338
 339                 cp = add (buf, NULL);
 340                 while (state == FLDPLUS) {
 341                     bufsz = sizeof buf;
 342                     state = m_getfld (&gstate, name, buf, &bufsz, fp);
 343                     cp = add (buf, cp);
 344                 }
 345                 bp = cp;
 346                 passno = 1;
 347
 348 again:
 349                 for (; isspace ((unsigned char) *bp); bp++)
 350                     continue;
 351                 if (*bp == '(') {
 352                     int i;
 353
 354                     for (bp++, i = 0;;) {
 355                         switch (*bp++) {
 356                         case '\0':
 357 invalid:
 358                             result = 0;
 359                             goto out;
 360                         case '\\':
 361                             if (*bp++ == '\0')
 362                                 goto invalid;
 363                             continue;
 364                         case '(':
 365                             i++;
 366                             /* and fall... */
 367                         default:
 368                             continue;
 369                         case ')':
 370                             if (--i < 0)
 371                                 break;
 372                             continue;
 373                         }
 374                         break;
 375                     }
 376                 }
 377                 if (passno == 2) {
 378                     if (*bp != '/')
 379                         goto invalid;
 380                     bp++;
 381                     passno = 3;
 382                     goto again;
 383                 }
 384                 for (dp = bp; istoken (*dp); dp++)
 385                     continue;
 386                 c = *dp;
 387                 *dp = '\0';
 388                 if (!*bp)
 389                     goto invalid;
 390                 if (passno > 1) {
 391                     if ((result = (strcasecmp (bp, "plain") != 0)))
 392                         goto out;
 393                     *dp = c;
 394                     for (dp++; isspace ((unsigned char) *dp); dp++)
 395                         continue;
 396                     if (*dp) {
 397                         if ((result = !uprf (dp, "charset")))
 398                             goto out;
 399                         dp += sizeof("charset") - 1;
 400                         while (isspace ((unsigned char) *dp))
 401                             dp++;
 402                         if (*dp++ != '=')
 403                             goto invalid;
 404                         while (isspace ((unsigned char) *dp))
 405                             dp++;
 406                         if (*dp == '"') {
 407                             if ((bp = strchr(++dp, '"')))
 408                                 *bp = '\0';
 409                         } else {
 410                             for (bp = dp; *bp; bp++)
 411                                 if (!istoken (*bp)) {
 412                                     *bp = '\0';
 413                                     break;
 414                                 }
 415                         }
 416                     } else {
 417                         /* Default character set */
 418                         dp = "US-ASCII";
 419                     }
 420                     /* Check the character set */
 421                     result = !check_charset (dp, strlen (dp));
 422                 } else {
 423                     if (!(result = (strcasecmp (bp, "text") != 0))) {
 424                         *dp = c;
 425                         bp = dp;
 426                         passno = 2;
 427                         goto again;
 428                     }
 429                 }
 430 out:
 431                 free (cp);
 432                 if (result) {
 433                     fclose (fp);
 434                     m_getfld_state_destroy (&gstate);
 435                     return result;
 436                 }
 437                 break;
 438             }
 439
 440             /*
 441              * Check Content-Transfer-Encoding field
 442              */
 443             if (!strcasecmp (name, ENCODING_FIELD)) {
 444                 cp = add (buf, NULL);
 445                 while (state == FLDPLUS) {
 446                     bufsz = sizeof buf;
 447                     state = m_getfld (&gstate, name, buf, &bufsz, fp);
 448                     cp = add (buf, cp);
 449                 }
 450                 for (bp = cp; isspace ((unsigned char) *bp); bp++)
 451                     continue;
 452                 for (dp = bp; istoken ((unsigned char) *dp); dp++)
 453                     continue;
 454                 *dp = '\0';
 455                 result = (strcasecmp (bp, "7bit")
 456                        && strcasecmp (bp, "8bit")
 457                        && strcasecmp (bp, "binary"));
 458
 459                 free (cp);
 460                 if (result) {
 461                     fclose (fp);
 462                     m_getfld_state_destroy (&gstate);
 463                     return result;
 464                 }
 465                 break;
 466             }
 467
 468             /*
 469              * Just skip the rest of this header
 470              * field and go to next one.
 471              */
 472             while (state == FLDPLUS) {
 473                 bufsz = sizeof buf;
 474                 state = m_getfld (&gstate, name, buf, &bufsz, fp);
 475             }
 476             break;
 477
 478             /*
 479              * We've passed the message header,
 480              * so message is just text.
 481              */
 482         default:
 483             fclose (fp);
 484             m_getfld_state_destroy (&gstate);
 485             return 0;
 486         }
 487     }
 488 }