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

   1 /* show.c -- show/list messages
   2  *
   3  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   4  * COPYRIGHT file in the root directory of the nmh distribution for
   5  * complete copyright information.
   6  */
   7
   8 #include "h/mh.h"
   9 #include "sbr/seq_setunseen.h"
  10 #include "sbr/seq_setprev.h"
  11 #include "sbr/seq_setcur.h"
  12 #include "sbr/seq_save.h"
  13 #include "sbr/smatch.h"
  14 #include "sbr/r1bindex.h"
  15 #include "sbr/uprf.h"
  16 #include "sbr/check_charset.h"
  17 #include "sbr/m_draft.h"
  18 #include "sbr/m_convert.h"
  19 #include "sbr/getfolder.h"
  20 #include "sbr/folder_read.h"
  21 #include "sbr/context_save.h"
  22 #include "sbr/context_replace.h"
  23 #include "sbr/context_find.h"
  24 #include "sbr/ambigsw.h"
  25 #include "sbr/path.h"
  26 #include "sbr/print_version.h"
  27 #include "sbr/print_help.h"
  28 #include "sbr/arglist.h"
  29 #include "sbr/error.h"
  30 #include "h/mime.h"
  31 #include "h/done.h"
  32 #include "h/utils.h"
  33 #include "sbr/m_maildir.h"
  34
  35 #define SHOW_SWITCHES \
  36     X("checkmime", 0, CHECKMIMESW) \
  37     X("nocheckmime", 0, NOCHECKMIMESW) \
  38     X("header", 0, HEADSW) \
  39     X("noheader", 0, NHEADSW) \
  40     X("form formfile", 0, FORMSW) \
  41     X("moreproc program", 0, PROGSW) \
  42     X("nomoreproc", 0, NPROGSW) \
  43     X("length lines", 0, LENSW) \
  44     X("width columns", 0, WIDTHSW) \
  45     X("showproc program", 0, SHOWSW) \
  46     X("showmimeproc program", 0, SHOWMIMESW) \
  47     X("noshowproc", 0, NSHOWSW) \
  48     X("draft", 0, DRFTSW) \
  49     X("file file", -4, FILESW) /* interface from showfile */ \
  50     X("fmtproc program", 0, FMTPROCSW) \
  51     X("nofmtproc", 0, NFMTPROCSW) \
  52     X("version", 0, VERSIONSW) \
  53     X("help", 0, HELPSW) \
  54     /*                          \
  55      * switches for mhlproc     \
  56      */                         \
  57     X("concat", 0, CONCATSW) \
  58     X("noconcat", 0, NCONCATSW) \
  59     /*                          \
  60      * switches for mhshow      \
  61      */                         \
  62     X("part number", 0, PARTSW) \
  63     X("type content", 0, TYPESW) \
  64     X("prefer content", 0, PREFERSW) \
  65     X("markform file", 0, MARKFORMSW) \
  66     X("rcache policy", 0, RCACHESW) \
  67     X("wcache policy", 0, WCACHESW) \
  68
  69 #define X(sw, minchars, id) id,
  70 DEFINE_SWITCH_ENUM(SHOW);
  71 #undef X
  72
  73 #define X(sw, minchars, id) { sw, minchars, id },
  74 DEFINE_SWITCH_ARRAY(SHOW, switches);
  75 #undef X
  76
  77 /*
  78  * static prototypes
  79  */
  80 static int is_nontext(char *);
  81
  82 #define SHOW  0
  83 #define NEXT  1
  84 #define PREV  2
  85
  86
  87 int
  88 main (int argc, char **argv)
  89 {
  90     bool draftsw = false;
  91     bool headersw = true;
  92     bool nshow = false;
  93     bool checkmime = true;
  94     bool mime = false;
  95     int isdf = 0, mode = SHOW, msgnum;
  96     char *cp, *maildir, *file = NULL, *folder = NULL, *proc, *program;
  97     char buf[BUFSIZ], **argp, **arguments;
  98     struct msgs *mp = NULL;
  99     struct msgs_array msgs = { 0, 0, NULL };
 100     struct msgs_array vec = { 0, 0, NULL }, non_mhl_vec = { 0, 0, NULL };
 101
 102     if (nmh_init(argv[0], true, true)) { return 1; }
 103
 104     if (!strcasecmp (invo_name, "next")) {
 105         mode = NEXT;
 106     } else if (!strcasecmp (invo_name, "prev")) {
 107         mode = PREV;
 108     }
 109     arguments = getarguments (invo_name, argc, argv, 1);
 110     argp = arguments;
 111
 112     while ((cp = *argp++)) {
 113         if (*cp == '-') {
 114             switch (smatch (++cp, switches)) {
 115                 case AMBIGSW:
 116                     ambigsw (cp, switches);
 117                     done (1);
 118
 119                 case HEADSW:
 120                     headersw = true;
 121                     goto non_mhl_switches;
 122                 case NHEADSW:
 123                     headersw = false;
 124                     /* FALLTHRU */
 125                 case CONCATSW:
 126                 case NCONCATSW:
 127 non_mhl_switches:
 128                     /* mhl can't handle these, so keep them separate. */
 129                     app_msgarg(&non_mhl_vec, --cp);
 130                     continue;
 131
 132                 case UNKWNSW:
 133                 case NPROGSW:
 134                 case NFMTPROCSW:
 135                     app_msgarg(&vec, --cp);
 136                     continue;
 137
 138                 case HELPSW:
 139                     snprintf (buf, sizeof(buf),
 140                         "%s [+folder] %s[switches] [switches for showproc]",
 141                         invo_name, mode == SHOW ? "[msgs] ": "");
 142                     print_help (buf, switches, 1);
 143                     done (0);
 144                 case VERSIONSW:
 145                     print_version(invo_name);
 146                     done (0);
 147
 148                 case DRFTSW:
 149                     if (file)
 150                         die("only one file at a time!");
 151                     draftsw = true;
 152                     if (mode == SHOW)
 153                         continue;
 154 usage:
 155                     die(                            "usage: %s [+folder] [switches] [switches for showproc]",
 156                             invo_name);
 157                 case FILESW:
 158                     if (mode != SHOW)
 159                         goto usage;
 160                     if (draftsw || file)
 161                         die("only one file at a time!");
 162                     if (!(cp = *argp++) || *cp == '-')
 163                         die("missing argument to %s", argp[-2]);
 164                     file = path (cp, TFILE);
 165                     continue;
 166
 167                 case FORMSW:
 168                     app_msgarg(&vec, --cp);
 169                     if (!(cp = *argp++) || *cp == '-')
 170                         die("missing argument to %s", argp[-2]);
 171                     app_msgarg(&vec, mh_xstrdup(etcpath(cp)));
 172                     continue;
 173
 174                 case PROGSW:
 175                 case LENSW:
 176                 case WIDTHSW:
 177                 case FMTPROCSW:
 178                 case PARTSW:
 179                 case TYPESW:
 180                 case PREFERSW:
 181                 case MARKFORMSW:
 182                 case RCACHESW:
 183                 case WCACHESW:
 184                     app_msgarg(&vec, --cp);
 185                     if (!(cp = *argp++) || *cp == '-')
 186                         die("missing argument to %s", argp[-2]);
 187                     app_msgarg(&vec, cp);
 188                     continue;
 189
 190                 case SHOWSW:
 191                     if (!(showproc = *argp++) || *showproc == '-')
 192                         die("missing argument to %s", argp[-2]);
 193                     nshow = false;
 194                     continue;
 195                 case NSHOWSW:
 196                     nshow = true;
 197                     continue;
 198
 199                 case SHOWMIMESW:
 200                     if (!(showmimeproc = *argp++) || *showmimeproc == '-')
 201                         die("missing argument to %s", argp[-2]);
 202                     nshow = false;
 203                     continue;
 204                 case CHECKMIMESW:
 205                     checkmime = true;
 206                     continue;
 207                 case NOCHECKMIMESW:
 208                     checkmime = false;
 209                     continue;
 210             }
 211         }
 212         if (*cp == '+' || *cp == '@') {
 213             if (folder)
 214                 die("only one folder at a time!");
 215             folder = pluspath (cp);
 216         } else {
 217             if (mode != SHOW)
 218                 goto usage;
 219             app_msgarg(&msgs, cp);
 220         }
 221     }
 222
 223     if (!context_find ("path"))
 224         free (path ("./", TFOLDER));
 225
 226     if (draftsw || file) {
 227         if (msgs.size)
 228             die("only one file at a time!");
 229         if (draftsw)
 230             app_msgarg(&vec, mh_xstrdup(m_draft(folder, NULL, 1, &isdf)));
 231         else
 232             app_msgarg(&vec, file);
 233         headersw = false;
 234         goto go_to_it;
 235     }
 236
 237     if (!msgs.size) {
 238         switch (mode) {
 239             case NEXT:
 240                 app_msgarg(&msgs, "next");
 241                 break;
 242             case PREV:
 243                 app_msgarg(&msgs, "prev");
 244                 break;
 245             default:
 246                 app_msgarg(&msgs, "cur");
 247                 break;
 248         }
 249     }
 250
 251     if (!folder)
 252         folder = getfolder (1);
 253     maildir = m_maildir (folder);
 254
 255     if (chdir (maildir) == NOTOK)
 256         adios (maildir, "unable to change directory to");
 257
 258     /* read folder and create message structure */
 259     if (!(mp = folder_read (folder, 1)))
 260         die("unable to read folder %s", folder);
 261
 262     /* check for empty folder */
 263     if (mp->nummsg == 0)
 264         die("no messages in %s", folder);
 265
 266     /* parse all the message ranges/sequences and set SELECTED */
 267     for (msgnum = 0; msgnum < msgs.size; msgnum++)
 268         if (!m_convert (mp, msgs.msgs[msgnum]))
 269             done (1);
 270
 271     /*
 272      * Set the SELECT_UNSEEN bit for all the SELECTED messages,
 273      * since we will use that as a tag to know which messages
 274      * to remove from the "unseen" sequence.
 275      */
 276     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 277         if (is_selected(mp, msgnum))
 278             set_unseen (mp, msgnum);
 279
 280     seq_setprev (mp);           /* set the Previous-Sequence */
 281     seq_setunseen (mp, 1);      /* unset the Unseen-Sequence */
 282
 283     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 284         if (is_selected(mp, msgnum))
 285             app_msgarg(&vec, mh_xstrdup(m_name (msgnum)));
 286
 287     seq_setcur (mp, mp->hghsel);        /* update current message  */
 288     seq_save (mp);                      /* synchronize sequences   */
 289     context_replace (pfolder, folder);  /* update current folder   */
 290     context_save ();                    /* save the context file   */
 291
 292 go_to_it: ;
 293
 294     /*
 295      * Decide which "proc" to use
 296      */
 297     if (nshow) {
 298         proc = catproc;
 299     } else {
 300         /* check if any messages are non-text MIME messages */
 301         if (! mime  &&  checkmime) {
 302             if (!draftsw && !file) {
 303                 /* loop through selected messages and check for MIME */
 304                 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 305                     if (is_selected (mp, msgnum) && is_nontext (m_name (msgnum))) {
 306                         mime = true;
 307                         break;
 308                     }
 309             } else {
 310                 /* check the file or draft for MIME */
 311                 if (is_nontext (vec.msgs[vec.size - 1]))
 312                     mime = true;
 313             }
 314         }
 315
 316         /* Set the "proc" */
 317         if (mime)
 318             proc = showmimeproc;
 319         else
 320             proc = showproc;
 321     }
 322
 323     if (folder && !draftsw && !file)
 324         setenv("mhfolder", folder, 1);
 325
 326     if (strcmp (r1bindex (proc, '/'), "cat") == 0) {
 327
 328         if (headersw && vec.size == 1)
 329             printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 330
 331     } else if (strcmp (r1bindex (proc, '/'), "mhl") == 0) {
 332
 333         if (headersw && vec.size == 1)
 334             printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 335
 336         /* If "mhl", then run it internally */
 337         argsplit_insert(&vec, "mhl", &program);
 338         app_msgarg(&vec, NULL);
 339         mhl (vec.size, vec.msgs);
 340         done (0);
 341
 342     } else {
 343         int i;
 344         char **mp;
 345
 346         for (i = 0, mp = non_mhl_vec.msgs; i < non_mhl_vec.size; ++i, ++mp) {
 347             if (draftsw || file) {
 348                 /* Insert the switch before the filename. */
 349                 app_msgarg(&vec, vec.msgs[vec.size - 1]);
 350                 vec.msgs[vec.size - 2] = *mp;
 351             } else {
 352                 app_msgarg(&vec, *mp);
 353             }
 354         }
 355
 356         if (strcmp (r1bindex (proc, '/'), "mhn") == 0) {
 357             /* Add "-file" if showing file or draft, */
 358             if (draftsw || file) {
 359                 app_msgarg(&vec, vec.msgs[vec.size - 1]);
 360                 vec.msgs[vec.size - 2] = "-file";
 361             }
 362             /* and add -show for backward compatibility */
 363             app_msgarg(&vec, "-show");
 364         } else if (strcmp (r1bindex (proc, '/'), "mhshow") == 0) {
 365             /* If "mhshow", add "-file" if showing file or draft. */
 366             if (draftsw || file) {
 367                 app_msgarg(&vec, vec.msgs[vec.size - 1]);
 368                 vec.msgs[vec.size - 2] = "-file";
 369             }
 370         } else {
 371             if (headersw && vec.size == 1)
 372                 printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 373         }
 374     }
 375
 376     fflush (stdout);
 377
 378     argsplit_insert(&vec, proc, &program);
 379     app_msgarg(&vec, NULL);
 380     execvp (program, vec.msgs);
 381     adios (proc, "unable to exec");
 382     return 0;  /* dead code to satisfy the compiler */
 383 }
 384
 385
 386 /*
 387  * Check if a message or file contains any non-text parts
 388  */
 389 static int
 390 is_nontext (char *msgnam)
 391 {
 392     int result, state;
 393     char *bp, *dp, *cp;
 394     char buf[NMH_BUFSIZ], name[NAMESZ];
 395     FILE *fp;
 396     m_getfld_state_t gstate;
 397
 398     if ((fp = fopen (msgnam, "r")) == NULL)
 399         return 0;
 400     gstate = m_getfld_state_init(fp);
 401     for (;;) {
 402         int bufsz = sizeof buf;
 403         switch (state = m_getfld2(&gstate, name, buf, &bufsz)) {
 404         case FLD:
 405         case FLDPLUS:
 406             /*
 407              * Check Content-Type field
 408              */
 409             if (!strcasecmp (name, TYPE_FIELD)) {
 410                 int passno;
 411                 char c;
 412
 413                 cp = mh_xstrdup(buf);
 414                 while (state == FLDPLUS) {
 415                     bufsz = sizeof buf;
 416                     state = m_getfld2(&gstate, name, buf, &bufsz);
 417                     cp = add (buf, cp);
 418                 }
 419                 bp = cp;
 420                 passno = 1;
 421
 422 again:
 423                 for (; isspace ((unsigned char) *bp); bp++)
 424                     continue;
 425                 if (*bp == '(') {
 426                     int i;
 427
 428                     for (bp++, i = 0;;) {
 429                         switch (*bp++) {
 430                         case '\0':
 431 invalid:
 432                             result = 0;
 433                             goto out;
 434                         case '\\':
 435                             if (*bp++ == '\0')
 436                                 goto invalid;
 437                             continue;
 438                         case '(':
 439                             i++;
 440                             continue;
 441                         default:
 442                             continue;
 443                         case ')':
 444                             if (--i < 0)
 445                                 break;
 446                             continue;
 447                         }
 448                         break;
 449                     }
 450                 }
 451                 if (passno == 2) {
 452                     if (*bp != '/')
 453                         goto invalid;
 454                     bp++;
 455                     passno = 3;
 456                     goto again;
 457                 }
 458                 for (dp = bp; istoken (*dp); dp++)
 459                     continue;
 460                 c = *dp;
 461                 *dp = '\0';
 462                 if (!*bp)
 463                     goto invalid;
 464                 if (passno > 1) {
 465                     if ((result = (strcasecmp (bp, "plain") != 0)))
 466                         goto out;
 467                     *dp = c;
 468                     for (dp++; isspace ((unsigned char) *dp); dp++)
 469                         continue;
 470                     if (*dp) {
 471                         if ((result = !uprf (dp, "charset")))
 472                             goto out;
 473                         dp += LEN("charset");
 474                         while (isspace ((unsigned char) *dp))
 475                             dp++;
 476                         if (*dp++ != '=')
 477                             goto invalid;
 478                         while (isspace ((unsigned char) *dp))
 479                             dp++;
 480                         if (*dp == '"') {
 481                             if ((bp = strchr(++dp, '"')))
 482                                 *bp = '\0';
 483                         } else {
 484                             for (bp = dp; *bp; bp++)
 485                                 if (!istoken (*bp)) {
 486                                     *bp = '\0';
 487                                     break;
 488                                 }
 489                         }
 490                     } else {
 491                         /* Default character set */
 492                         dp = "US-ASCII";
 493                     }
 494                     /* Check the character set */
 495                     result = !check_charset (dp, strlen (dp));
 496                 } else {
 497                     if (!(result = (strcasecmp (bp, "text") != 0))) {
 498                         *dp = c;
 499                         bp = dp;
 500                         passno = 2;
 501                         goto again;
 502                     }
 503                 }
 504 out:
 505                 free (cp);
 506                 if (result) {
 507                     fclose (fp);
 508                     m_getfld_state_destroy (&gstate);
 509                     return result;
 510                 }
 511                 break;
 512             }
 513
 514             /*
 515              * Check Content-Transfer-Encoding field
 516              */
 517             if (!strcasecmp (name, ENCODING_FIELD)) {
 518                 cp = mh_xstrdup(buf);
 519                 while (state == FLDPLUS) {
 520                     bufsz = sizeof buf;
 521                     state = m_getfld2(&gstate, name, buf, &bufsz);
 522                     cp = add (buf, cp);
 523                 }
 524                 for (bp = cp; isspace ((unsigned char) *bp); bp++)
 525                     continue;
 526                 for (dp = bp; istoken ((unsigned char) *dp); dp++)
 527                     continue;
 528                 *dp = '\0';
 529                 result = (strcasecmp (bp, "7bit")
 530                        && strcasecmp (bp, "8bit")
 531                        && strcasecmp (bp, "binary"));
 532
 533                 free (cp);
 534                 if (result) {
 535                     fclose (fp);
 536                     m_getfld_state_destroy (&gstate);
 537                     return result;
 538                 }
 539                 break;
 540             }
 541
 542             /*
 543              * Just skip the rest of this header
 544              * field and go to next one.
 545              */
 546             while (state == FLDPLUS) {
 547                 bufsz = sizeof buf;
 548                 state = m_getfld2(&gstate, name, buf, &bufsz);
 549             }
 550             break;
 551
 552             /*
 553              * We've passed the message header,
 554              * so message is just text.
 555              */
 556         default:
 557             fclose (fp);
 558             m_getfld_state_destroy (&gstate);
 559             return 0;
 560         }
 561     }
 562 }