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