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