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