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 "mhlsbr.h"
  10 #include "sbr/m_name.h"
  11 #include "sbr/m_getfld.h"
  12 #include "sbr/getarguments.h"
  13 #include "sbr/seq_setunseen.h"
  14 #include "sbr/seq_setprev.h"
  15 #include "sbr/seq_setcur.h"
  16 #include "sbr/seq_save.h"
  17 #include "sbr/smatch.h"
  18 #include "sbr/r1bindex.h"
  19 #include "sbr/uprf.h"
  20 #include "sbr/check_charset.h"
  21 #include "sbr/m_draft.h"
  22 #include "sbr/m_convert.h"
  23 #include "sbr/getfolder.h"
  24 #include "sbr/folder_read.h"
  25 #include "sbr/context_save.h"
  26 #include "sbr/context_replace.h"
  27 #include "sbr/context_find.h"
  28 #include "sbr/ambigsw.h"
  29 #include "sbr/path.h"
  30 #include "sbr/print_version.h"
  31 #include "sbr/print_help.h"
  32 #include "sbr/arglist.h"
  33 #include "sbr/error.h"
  34 #include "h/mime.h"
  35 #include "h/done.h"
  36 #include "h/utils.h"
  37 #include "sbr/m_maildir.h"
  38
  39 #define SHOW_SWITCHES \
  40     X("checkmime", 0, CHECKMIMESW) \
  41     X("nocheckmime", 0, NOCHECKMIMESW) \
  42     X("header", 0, HEADSW) \
  43     X("noheader", 0, NHEADSW) \
  44     X("form formfile", 0, FORMSW) \
  45     X("moreproc program", 0, PROGSW) \
  46     X("nomoreproc", 0, NPROGSW) \
  47     X("length lines", 0, LENSW) \
  48     X("width columns", 0, WIDTHSW) \
  49     X("showproc program", 0, SHOWSW) \
  50     X("showmimeproc program", 0, SHOWMIMESW) \
  51     X("noshowproc", 0, NSHOWSW) \
  52     X("draft", 0, DRFTSW) \
  53     X("file file", -4, FILESW) /* interface from showfile */ \
  54     X("fmtproc program", 0, FMTPROCSW) \
  55     X("nofmtproc", 0, NFMTPROCSW) \
  56     X("version", 0, VERSIONSW) \
  57     X("help", 0, HELPSW) \
  58     /*                          \
  59      * switches for mhlproc     \
  60      */                         \
  61     X("concat", 0, CONCATSW) \
  62     X("noconcat", 0, NCONCATSW) \
  63     /*                          \
  64      * switches for mhshow      \
  65      */                         \
  66     X("part number", 0, PARTSW) \
  67     X("type content", 0, TYPESW) \
  68     X("prefer content", 0, PREFERSW) \
  69     X("markform file", 0, MARKFORMSW) \
  70     X("rcache policy", 0, RCACHESW) \
  71     X("wcache policy", 0, WCACHESW) \
  72
  73 #define X(sw, minchars, id) id,
  74 DEFINE_SWITCH_ENUM(SHOW);
  75 #undef X
  76
  77 #define X(sw, minchars, id) { sw, minchars, id },
  78 DEFINE_SWITCH_ARRAY(SHOW, switches);
  79 #undef X
  80
  81 /*
  82  * static prototypes
  83  */
  84 static int is_nontext(char *);
  85
  86 #define SHOW  0
  87 #define NEXT  1
  88 #define PREV  2
  89
  90
  91 int
  92 main (int argc, char **argv)
  93 {
  94     bool draftsw = false;
  95     bool headersw = true;
  96     bool nshow = false;
  97     bool checkmime = true;
  98     bool mime = false;
  99     int isdf = 0, mode = SHOW, msgnum;
 100     char *cp, *maildir, *file = NULL, *folder = NULL, *proc, *program;
 101     char buf[BUFSIZ], **argp, **arguments;
 102     struct msgs *mp = NULL;
 103     struct msgs_array msgs = { 0, 0, NULL };
 104     struct msgs_array vec = { 0, 0, NULL }, non_mhl_vec = { 0, 0, NULL };
 105
 106     if (nmh_init(argv[0], true, true)) { return 1; }
 107
 108     if (!strcasecmp (invo_name, "next")) {
 109         mode = NEXT;
 110     } else if (!strcasecmp (invo_name, "prev")) {
 111         mode = PREV;
 112     }
 113     arguments = getarguments (invo_name, argc, argv, 1);
 114     argp = arguments;
 115
 116     while ((cp = *argp++)) {
 117         if (*cp == '-') {
 118             switch (smatch (++cp, switches)) {
 119                 case AMBIGSW:
 120                     ambigsw (cp, switches);
 121                     done (1);
 122
 123                 case HEADSW:
 124                     headersw = true;
 125                     goto non_mhl_switches;
 126                 case NHEADSW:
 127                     headersw = false;
 128                     /* FALLTHRU */
 129                 case CONCATSW:
 130                 case NCONCATSW:
 131 non_mhl_switches:
 132                     /* mhl can't handle these, so keep them separate. */
 133                     app_msgarg(&non_mhl_vec, --cp);
 134                     continue;
 135
 136                 case UNKWNSW:
 137                 case NPROGSW:
 138                 case NFMTPROCSW:
 139                     app_msgarg(&vec, --cp);
 140                     continue;
 141
 142                 case HELPSW:
 143                     snprintf (buf, sizeof(buf),
 144                         "%s [+folder] %s[switches] [switches for showproc]",
 145                         invo_name, mode == SHOW ? "[msgs] ": "");
 146                     print_help (buf, switches, 1);
 147                     done (0);
 148                 case VERSIONSW:
 149                     print_version(invo_name);
 150                     done (0);
 151
 152                 case DRFTSW:
 153                     if (file)
 154                         die("only one file at a time!");
 155                     draftsw = true;
 156                     if (mode == SHOW)
 157                         continue;
 158 usage:
 159                     die(                            "usage: %s [+folder] [switches] [switches for showproc]",
 160                             invo_name);
 161                 case FILESW:
 162                     if (mode != SHOW)
 163                         goto usage;
 164                     if (draftsw || file)
 165                         die("only one file at a time!");
 166                     if (!(cp = *argp++) || *cp == '-')
 167                         die("missing argument to %s", argp[-2]);
 168                     file = path (cp, TFILE);
 169                     continue;
 170
 171                 case FORMSW:
 172                     app_msgarg(&vec, --cp);
 173                     if (!(cp = *argp++) || *cp == '-')
 174                         die("missing argument to %s", argp[-2]);
 175                     app_msgarg(&vec, mh_xstrdup(etcpath(cp)));
 176                     continue;
 177
 178                 case PROGSW:
 179                 case LENSW:
 180                 case WIDTHSW:
 181                 case FMTPROCSW:
 182                 case PARTSW:
 183                 case TYPESW:
 184                 case PREFERSW:
 185                 case MARKFORMSW:
 186                 case RCACHESW:
 187                 case WCACHESW:
 188                     app_msgarg(&vec, --cp);
 189                     if (!(cp = *argp++) || *cp == '-')
 190                         die("missing argument to %s", argp[-2]);
 191                     app_msgarg(&vec, cp);
 192                     continue;
 193
 194                 case SHOWSW:
 195                     if (!(showproc = *argp++) || *showproc == '-')
 196                         die("missing argument to %s", argp[-2]);
 197                     nshow = false;
 198                     continue;
 199                 case NSHOWSW:
 200                     nshow = true;
 201                     continue;
 202
 203                 case SHOWMIMESW:
 204                     if (!(showmimeproc = *argp++) || *showmimeproc == '-')
 205                         die("missing argument to %s", argp[-2]);
 206                     nshow = false;
 207                     continue;
 208                 case CHECKMIMESW:
 209                     checkmime = true;
 210                     continue;
 211                 case NOCHECKMIMESW:
 212                     checkmime = false;
 213                     continue;
 214             }
 215         }
 216         if (*cp == '+' || *cp == '@') {
 217             if (folder)
 218                 die("only one folder at a time!");
 219             folder = pluspath (cp);
 220         } else {
 221             if (mode != SHOW)
 222                 goto usage;
 223             app_msgarg(&msgs, cp);
 224         }
 225     }
 226
 227     if (!context_find ("path"))
 228         free (path ("./", TFOLDER));
 229
 230     if (draftsw || file) {
 231         if (msgs.size)
 232             die("only one file at a time!");
 233         if (draftsw)
 234             app_msgarg(&vec, mh_xstrdup(m_draft(folder, NULL, 1, &isdf)));
 235         else
 236             app_msgarg(&vec, file);
 237         headersw = false;
 238         goto go_to_it;
 239     }
 240
 241     if (!msgs.size) {
 242         switch (mode) {
 243             case NEXT:
 244                 app_msgarg(&msgs, "next");
 245                 break;
 246             case PREV:
 247                 app_msgarg(&msgs, "prev");
 248                 break;
 249             default:
 250                 app_msgarg(&msgs, "cur");
 251                 break;
 252         }
 253     }
 254
 255     if (!folder)
 256         folder = getfolder (1);
 257     maildir = m_maildir (folder);
 258
 259     if (chdir (maildir) == NOTOK)
 260         adios (maildir, "unable to change directory to");
 261
 262     /* read folder and create message structure */
 263     if (!(mp = folder_read (folder, 1)))
 264         die("unable to read folder %s", folder);
 265
 266     /* check for empty folder */
 267     if (mp->nummsg == 0)
 268         die("no messages in %s", folder);
 269
 270     /* parse all the message ranges/sequences and set SELECTED */
 271     for (msgnum = 0; msgnum < msgs.size; msgnum++)
 272         if (!m_convert (mp, msgs.msgs[msgnum]))
 273             done (1);
 274
 275     /*
 276      * Set the SELECT_UNSEEN bit for all the SELECTED messages,
 277      * since we will use that as a tag to know which messages
 278      * to remove from the "unseen" sequence.
 279      */
 280     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 281         if (is_selected(mp, msgnum))
 282             set_unseen (mp, msgnum);
 283
 284     seq_setprev (mp);           /* set the Previous-Sequence */
 285     seq_setunseen (mp, 1);      /* unset the Unseen-Sequence */
 286
 287     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 288         if (is_selected(mp, msgnum))
 289             app_msgarg(&vec, mh_xstrdup(m_name (msgnum)));
 290
 291     seq_setcur (mp, mp->hghsel);        /* update current message  */
 292     seq_save (mp);                      /* synchronize sequences   */
 293     context_replace (pfolder, folder);  /* update current folder   */
 294     context_save ();                    /* save the context file   */
 295
 296 go_to_it: ;
 297
 298     /*
 299      * Decide which "proc" to use
 300      */
 301     if (nshow) {
 302         proc = catproc;
 303     } else {
 304         /* check if any messages are non-text MIME messages */
 305         if (! mime  &&  checkmime) {
 306             if (!draftsw && !file) {
 307                 /* loop through selected messages and check for MIME */
 308                 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 309                     if (is_selected (mp, msgnum) && is_nontext (m_name (msgnum))) {
 310                         mime = true;
 311                         break;
 312                     }
 313             } else {
 314                 /* check the file or draft for MIME */
 315                 if (is_nontext (vec.msgs[vec.size - 1]))
 316                     mime = true;
 317             }
 318         }
 319
 320         /* Set the "proc" */
 321         if (mime)
 322             proc = showmimeproc;
 323         else
 324             proc = showproc;
 325     }
 326
 327     if (folder && !draftsw && !file)
 328         setenv("mhfolder", folder, 1);
 329
 330     if (strcmp (r1bindex (proc, '/'), "cat") == 0) {
 331
 332         if (headersw && vec.size == 1)
 333             printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 334
 335     } else if (strcmp (r1bindex (proc, '/'), "mhl") == 0) {
 336
 337         if (headersw && vec.size == 1)
 338             printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 339
 340         /* If "mhl", then run it internally */
 341         argsplit_insert(&vec, "mhl", &program);
 342         app_msgarg(&vec, NULL);
 343         mhl (vec.size, vec.msgs);
 344         done (0);
 345
 346     } else {
 347         int i;
 348         char **mp;
 349
 350         for (i = 0, mp = non_mhl_vec.msgs; i < non_mhl_vec.size; ++i, ++mp) {
 351             if (draftsw || file) {
 352                 /* Insert the switch before the filename. */
 353                 app_msgarg(&vec, vec.msgs[vec.size - 1]);
 354                 vec.msgs[vec.size - 2] = *mp;
 355             } else {
 356                 app_msgarg(&vec, *mp);
 357             }
 358         }
 359
 360         if (strcmp (r1bindex (proc, '/'), "mhn") == 0) {
 361             /* Add "-file" if showing file or draft, */
 362             if (draftsw || file) {
 363                 app_msgarg(&vec, vec.msgs[vec.size - 1]);
 364                 vec.msgs[vec.size - 2] = "-file";
 365             }
 366             /* and add -show for backward compatibility */
 367             app_msgarg(&vec, "-show");
 368         } else if (strcmp (r1bindex (proc, '/'), "mhshow") == 0) {
 369             /* If "mhshow", add "-file" if showing file or draft. */
 370             if (draftsw || file) {
 371                 app_msgarg(&vec, vec.msgs[vec.size - 1]);
 372                 vec.msgs[vec.size - 2] = "-file";
 373             }
 374         } else {
 375             if (headersw && vec.size == 1)
 376                 printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 377         }
 378     }
 379
 380     fflush (stdout);
 381
 382     argsplit_insert(&vec, proc, &program);
 383     app_msgarg(&vec, NULL);
 384     execvp (program, vec.msgs);
 385     adios (proc, "unable to exec");
 386     return 0;  /* dead code to satisfy the compiler */
 387 }
 388
 389
 390 /*
 391  * Check if a message or file contains any non-text parts
 392  */
 393 static int
 394 is_nontext (char *msgnam)
 395 {
 396     int result, state;
 397     char *bp, *dp, *cp;
 398     char buf[NMH_BUFSIZ], name[NAMESZ];
 399     FILE *fp;
 400     m_getfld_state_t gstate;
 401
 402     if ((fp = fopen (msgnam, "r")) == NULL)
 403         return 0;
 404     gstate = m_getfld_state_init(fp);
 405     for (;;) {
 406         int bufsz = sizeof buf;
 407         switch (state = m_getfld2(&gstate, name, buf, &bufsz)) {
 408         case FLD:
 409         case FLDPLUS:
 410             /*
 411              * Check Content-Type field
 412              */
 413             if (!strcasecmp (name, TYPE_FIELD)) {
 414                 int passno;
 415                 char c;
 416
 417                 cp = mh_xstrdup(buf);
 418                 while (state == FLDPLUS) {
 419                     bufsz = sizeof buf;
 420                     state = m_getfld2(&gstate, name, buf, &bufsz);
 421                     cp = add (buf, cp);
 422                 }
 423                 bp = cp;
 424                 passno = 1;
 425
 426 again:
 427                 for (; isspace ((unsigned char) *bp); bp++)
 428                     continue;
 429                 if (*bp == '(') {
 430                     int i;
 431
 432                     for (bp++, i = 0;;) {
 433                         switch (*bp++) {
 434                         case '\0':
 435 invalid:
 436                             result = 0;
 437                             goto out;
 438                         case '\\':
 439                             if (*bp++ == '\0')
 440                                 goto invalid;
 441                             continue;
 442                         case '(':
 443                             i++;
 444                             continue;
 445                         default:
 446                             continue;
 447                         case ')':
 448                             if (--i < 0)
 449                                 break;
 450                             continue;
 451                         }
 452                         break;
 453                     }
 454                 }
 455                 if (passno == 2) {
 456                     if (*bp != '/')
 457                         goto invalid;
 458                     bp++;
 459                     passno = 3;
 460                     goto again;
 461                 }
 462                 for (dp = bp; istoken (*dp); dp++)
 463                     continue;
 464                 c = *dp;
 465                 *dp = '\0';
 466                 if (!*bp)
 467                     goto invalid;
 468                 if (passno > 1) {
 469                     if ((result = (strcasecmp (bp, "plain") != 0)))
 470                         goto out;
 471                     *dp = c;
 472                     for (dp++; isspace ((unsigned char) *dp); dp++)
 473                         continue;
 474                     if (*dp) {
 475                         if ((result = !uprf (dp, "charset")))
 476                             goto out;
 477                         dp += LEN("charset");
 478                         while (isspace ((unsigned char) *dp))
 479                             dp++;
 480                         if (*dp++ != '=')
 481                             goto invalid;
 482                         while (isspace ((unsigned char) *dp))
 483                             dp++;
 484                         if (*dp == '"') {
 485                             if ((bp = strchr(++dp, '"')))
 486                                 *bp = '\0';
 487                         } else {
 488                             for (bp = dp; *bp; bp++)
 489                                 if (!istoken (*bp)) {
 490                                     *bp = '\0';
 491                                     break;
 492                                 }
 493                         }
 494                     } else {
 495                         /* Default character set */
 496                         dp = "US-ASCII";
 497                     }
 498                     /* Check the character set */
 499                     result = !check_charset (dp, strlen (dp));
 500                 } else {
 501                     if (!(result = (strcasecmp (bp, "text") != 0))) {
 502                         *dp = c;
 503                         bp = dp;
 504                         passno = 2;
 505                         goto again;
 506                     }
 507                 }
 508 out:
 509                 free (cp);
 510                 if (result) {
 511                     fclose (fp);
 512                     m_getfld_state_destroy (&gstate);
 513                     return result;
 514                 }
 515                 break;
 516             }
 517
 518             /*
 519              * Check Content-Transfer-Encoding field
 520              */
 521             if (!strcasecmp (name, ENCODING_FIELD)) {
 522                 cp = mh_xstrdup(buf);
 523                 while (state == FLDPLUS) {
 524                     bufsz = sizeof buf;
 525                     state = m_getfld2(&gstate, name, buf, &bufsz);
 526                     cp = add (buf, cp);
 527                 }
 528                 for (bp = cp; isspace ((unsigned char) *bp); bp++)
 529                     continue;
 530                 for (dp = bp; istoken ((unsigned char) *dp); dp++)
 531                     continue;
 532                 *dp = '\0';
 533                 result = (strcasecmp (bp, "7bit")
 534                        && strcasecmp (bp, "8bit")
 535                        && strcasecmp (bp, "binary"));
 536
 537                 free (cp);
 538                 if (result) {
 539                     fclose (fp);
 540                     m_getfld_state_destroy (&gstate);
 541                     return result;
 542                 }
 543                 break;
 544             }
 545
 546             /*
 547              * Just skip the rest of this header
 548              * field and go to next one.
 549              */
 550             while (state == FLDPLUS) {
 551                 bufsz = sizeof buf;
 552                 state = m_getfld2(&gstate, name, buf, &bufsz);
 553             }
 554             break;
 555
 556             /*
 557              * We've passed the message header,
 558              * so message is just text.
 559              */
 560         default:
 561             fclose (fp);
 562             m_getfld_state_destroy (&gstate);
 563             return 0;
 564         }
 565     }
 566 }