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