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