git.marmaro.de Git - mmh/blob - uip/show.c

   1 /*
   2 ** show.c -- show/list messages
   3 **
   4 ** This code is Copyright (c) 2002, by the authors of nmh.  See the
   5 ** COPYRIGHT file in the root directory of the nmh distribution for
   6 ** complete copyright information.
   7 */
   8
   9 #include <h/mh.h>
  10 #include <h/mime.h>
  11 #include <h/utils.h>
  12
  13 static struct swit switches[] = {
  14 #define CHECKMIMESW  0
  15         { "checkmime", 0 },
  16 #define NOCHECKMIMESW  1
  17         { "nocheckmime", 0 },
  18 #define HEADSW  2
  19         { "header", 0 },
  20 #define NHEADSW  3
  21         { "noheader", 0 },
  22 #define FORMSW  4
  23         { "form formfile", 0 },
  24 #define PROGSW  5
  25         { "moreproc program", 0 },
  26 #define NPROGSW  6
  27         { "nomoreproc", 0 },
  28 #define LENSW  7
  29         { "length lines", 0 },
  30 #define WIDTHSW  8
  31         { "width columns", 0 },
  32 #define SHOWSW  9
  33         { "showproc program", 0 },
  34 #define SHOWMIMESW  10
  35         { "showmimeproc program", 0 },
  36 #define NSHOWSW  11
  37         { "noshowproc", 0 },
  38 #define FILESW  12
  39         { "file file", -4 },  /* interface from showfile */
  40 #define VERSIONSW  13
  41         { "version", 0 },
  42 #define HELPSW  14
  43         { "help", 0 },
  44         { NULL, 0 }
  45 };
  46
  47 /*
  48 ** static prototypes
  49 */
  50 static int is_nontext(char *);
  51
  52 /* prototype from mhlsbr.c */
  53 int mhl(int, char **);
  54
  55 #define SHOW  0
  56 #define NEXT  1
  57 #define PREV  2
  58
  59
  60 int
  61 main(int argc, char **argv)
  62 {
  63         int headersw = 1, msgp = 0;
  64         int nshow = 0, checkmime = 1, mime;
  65         int vecp = 1, procp = 1, mode = SHOW, msgnum;
  66         char *cp, *maildir, *file = NULL, *folder = NULL, *proc;
  67         char buf[BUFSIZ], **argp, **arguments;
  68         char *msgs[MAXARGS], *vec[MAXARGS];
  69         struct msgs *mp = NULL;
  70
  71 #ifdef LOCALE
  72         setlocale(LC_ALL, "");
  73 #endif
  74         invo_name = mhbasename(argv[0]);
  75
  76         /* read user profile/context */
  77         context_read();
  78
  79         if (!mh_strcasecmp(invo_name, "next")) {
  80                 mode = NEXT;
  81         } else if (!mh_strcasecmp(invo_name, "prev")) {
  82                 mode = PREV;
  83         }
  84         arguments = getarguments(invo_name, argc, argv, 1);
  85         argp = arguments;
  86
  87         while ((cp = *argp++)) {
  88                 if (*cp == '-') {
  89                         switch (smatch(++cp, switches)) {
  90                         case AMBIGSW:
  91                                 ambigsw(cp, switches);
  92                                 done(1);
  93                         case UNKWNSW:
  94                         case NPROGSW:
  95                                 vec[vecp++] = --cp;
  96                                 continue;
  97
  98                         case HELPSW:
  99                                 snprintf(buf, sizeof(buf), "%s [+folder] %s[switches] [switches for showproc]", invo_name, mode == SHOW ? "[msgs] ": "");
 100                                 print_help(buf, switches, 1);
 101                                 done(1);
 102                         case VERSIONSW:
 103                                 print_version(invo_name);
 104                                 done(1);
 105
 106                         case FILESW:
 107                                 if (mode != SHOW)
 108 usage:
 109                                         adios(NULL, "usage: %s [+folder] [switches] [switches for showproc]", invo_name);
 110
 111                                 if (file)
 112                                         adios(NULL, "only one file at a time!");
 113                                 if (!(cp = *argp++) || *cp == '-')
 114                                         adios(NULL, "missing argument to %s", argp[-2]);
 115                                 file = getcpy(expanddir(cp));
 116                                 continue;
 117
 118                         case HEADSW:
 119                                 headersw++;
 120                                 continue;
 121                         case NHEADSW:
 122                                 headersw = 0;
 123                                 continue;
 124
 125                         case FORMSW:
 126                                 vec[vecp++] = --cp;
 127                                 if (!(cp = *argp++) || *cp == '-')
 128                                         adios(NULL, "missing argument to %s",
 129                                                         argp[-2]);
 130                                 vec[vecp++] = getcpy(etcpath(cp));
 131                                 continue;
 132
 133                         case PROGSW:
 134                         case LENSW:
 135                         case WIDTHSW:
 136                                 vec[vecp++] = --cp;
 137                                 if (!(cp = *argp++) || *cp == '-')
 138                                         adios(NULL, "missing argument to %s",
 139                                                         argp[-2]);
 140                                 vec[vecp++] = cp;
 141                                 continue;
 142
 143                         case SHOWSW:
 144                                 if (!(showproc = *argp++) || *showproc == '-')
 145                                         adios(NULL, "missing argument to %s",
 146                                                         argp[-2]);
 147                                 nshow = 0;
 148                                 continue;
 149                         case NSHOWSW:
 150                                 nshow++;
 151                                 continue;
 152
 153                         case SHOWMIMESW:
 154                                 if (!(showmimeproc = *argp++) ||
 155                                                 *showmimeproc == '-')
 156                                         adios(NULL, "missing argument to %s",
 157                                                         argp[-2]);
 158                                 nshow = 0;
 159                                 continue;
 160                         case CHECKMIMESW:
 161                                 checkmime++;
 162                                 continue;
 163                         case NOCHECKMIMESW:
 164                                 checkmime = 0;
 165                                 continue;
 166                         }
 167                 }
 168                 if (*cp == '+' || *cp == '@') {
 169                         if (folder)
 170                                 adios(NULL, "only one folder at a time!");
 171                         else
 172                                 folder = getcpy(expandfol(cp));
 173                 } else if (mode != SHOW) {
 174                         goto usage;
 175                 } else {
 176                         msgs[msgp++] = cp;
 177                 }
 178         }
 179         procp = vecp;
 180
 181         if (file) {
 182                 if (msgp)
 183                         adios(NULL, "only one file at a time!");
 184                 vec[vecp++] = file;
 185                 goto go_to_it;
 186         }
 187
 188 #ifdef WHATNOW
 189         if (!msgp && !folder && mode == SHOW &&
 190                         (cp = getenv("mhdraft")) && *cp) {
 191                 vec[vecp++] = cp;
 192                 goto go_to_it;
 193         }
 194 #endif /* WHATNOW */
 195
 196         if (!msgp) {
 197                 switch (mode) {
 198                 case NEXT:
 199                         msgs[msgp++] = seq_next;
 200                         break;
 201                 case PREV:
 202                         msgs[msgp++] = seq_prev;
 203                         break;
 204                 default:
 205                         msgs[msgp++] = seq_cur;
 206                         break;
 207                 }
 208         }
 209
 210         if (!folder)
 211                 folder = getcurfol();
 212         maildir = toabsdir(folder);
 213
 214         if (chdir(maildir) == NOTOK)
 215                 adios(maildir, "unable to change directory to");
 216
 217         /* read folder and create message structure */
 218         if (!(mp = folder_read(folder)))
 219                 adios(NULL, "unable to read folder %s", folder);
 220
 221         /* check for empty folder */
 222         if (mp->nummsg == 0)
 223                 adios(NULL, "no messages in %s", folder);
 224
 225         /* parse all the message ranges/sequences and set SELECTED */
 226         for (msgnum = 0; msgnum < msgp; msgnum++)
 227                 if (!m_convert(mp, msgs[msgnum]))
 228                         done(1);
 229
 230         /*
 231         ** Set the SELECT_UNSEEN bit for all the SELECTED messages,
 232         ** since we will use that as a tag to know which messages
 233         ** to remove from the "unseen" sequence.
 234         */
 235         for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 236                 if (is_selected(mp, msgnum))
 237                         set_unseen(mp, msgnum);
 238
 239         seq_setprev(mp);  /* set the Previous-Sequence */
 240         seq_setunseen(mp, 0);  /* unset unseen seqs for shown msgs */
 241
 242         if (mp->numsel > MAXARGS - 2)
 243                 adios(NULL, "more than %d messages for show exec",
 244                                 MAXARGS - 2);
 245
 246         for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 247                 if (is_selected(mp, msgnum))
 248                         vec[vecp++] = getcpy(m_name(msgnum));
 249
 250         seq_setcur(mp, mp->hghsel);  /* update current message  */
 251         seq_save(mp);  /* synchronize sequences   */
 252         context_replace(curfolder, folder);  /* update current folder   */
 253         context_save();  /* save the context file   */
 254
 255         if (headersw && vecp == 2)
 256                 printf("(Message %s:%s)\n", folder, vec[1]);
 257
 258 go_to_it: ;
 259         fflush(stdout);
 260
 261         vec[vecp] = NULL;
 262
 263         /*
 264         ** Decide which "proc" to use
 265         */
 266         mime = 0;
 267         if (nshow) {
 268                 proc = catproc;
 269         } else {
 270                 /* check if any messages are non-text MIME messages */
 271                 if (checkmime && !getenv("NOMHNPROC")) {
 272                         if (!file) {
 273                                 /*
 274                                 ** loop through selected messages
 275                                 ** and check for MIME
 276                                 */
 277                                 for (msgnum = mp->lowsel;
 278                                                 msgnum <= mp->hghsel;
 279                                                 msgnum++)
 280                                         if (is_selected(mp, msgnum) && is_nontext(m_name(msgnum))) {
 281                                                 mime = 1;
 282                                                 break;
 283                                         }
 284                         } else {
 285                                 /* check the file for MIME */
 286                                 if (is_nontext(vec[vecp - 1]))
 287                                         mime = 1;
 288                         }
 289                 }
 290
 291                 /* Set the "proc" */
 292                 if (mime)
 293                         proc = showmimeproc;
 294                 else
 295                         proc = showproc;
 296         }
 297
 298         if (folder && !file)
 299                 m_putenv("mhfolder", folder);
 300
 301         /*
 302         ** For backward compatibility, if the "proc" is mhn,
 303         ** then add "-show" option.  Add "-file" if showing
 304         ** file.
 305         */
 306         if (strcmp(mhbasename(proc), "mhn") == 0) {
 307                 if (file) {
 308                         vec[vecp] = vec[vecp - 1];
 309                         vec[vecp - 1] = "-file";
 310                         vecp++;
 311                 }
 312                 vec[vecp++] = "-show";
 313                 vec[vecp] = NULL;
 314         }
 315
 316         /* If the "proc" is "mhshow", add "-file" if showing file.  */
 317         if (strcmp(mhbasename(proc), "mhshow") == 0 && file ) {
 318            vec[vecp] = vec[vecp - 1];
 319            vec[vecp - 1] = "-file";
 320            vec[++vecp] = NULL;
 321         }
 322
 323         /*
 324         ** If "proc" is mhl, then run it internally
 325         ** rather than exec'ing it.
 326         */
 327         if (strcmp(mhbasename(proc), "mhl") == 0) {
 328                 vec[0] = "mhl";
 329                 mhl(vecp, vec);
 330                 done(0);
 331         }
 332
 333         /*
 334         ** If you are not using a nmh command as your "proc", then
 335         ** add the path to the message names.  Currently, we are just
 336         ** checking for mhn here, since we've already taken care of mhl.
 337         */
 338         if (strcmp(mhbasename(proc), "mhl")==0
 339                         && !file
 340                         && chdir(maildir =
 341                         concat(toabsdir("+"), "/", NULL)) != NOTOK) {
 342                 mp->foldpath = concat(mp->foldpath, "/", NULL);
 343                 cp = (strncmp(mp->foldpath, maildir, strlen(maildir))==0) ?
 344                         mp->foldpath + strlen(maildir) :
 345                         mp->foldpath;
 346                 for (msgnum = procp; msgnum < vecp; msgnum++)
 347                         vec[msgnum] = concat(cp, vec[msgnum], NULL);
 348         }
 349
 350         vec[0] = mhbasename(proc);
 351         execvp(proc, vec);
 352         adios(proc, "unable to exec");
 353         return 0;  /* dead code to satisfy the compiler */
 354 }
 355
 356 /*
 357 ** Check if a message or file contains any non-text parts
 358 */
 359 static int
 360 is_nontext(char *msgnam)
 361 {
 362         int result, state;
 363         unsigned char *bp, *dp;
 364         char *cp;
 365         char buf[BUFSIZ], name[NAMESZ];
 366         FILE *fp;
 367
 368         if ((fp = fopen(msgnam, "r")) == NULL)
 369                 return 0;
 370
 371         for (state = FLD;;) {
 372                 switch (state = m_getfld(state, name, buf, sizeof(buf), fp)) {
 373                 case FLD:
 374                 case FLDPLUS:
 375                 case FLDEOF:
 376                         /*
 377                         ** Check Content-Type field
 378                         */
 379                         if (!mh_strcasecmp(name, TYPE_FIELD)) {
 380                                 int passno;
 381                                 char c;
 382
 383                                 cp = getcpy(buf);
 384                                 while (state == FLDPLUS) {
 385                                         state = m_getfld(state, name, buf,
 386                                                         sizeof(buf), fp);
 387                                         cp = add(buf, cp);
 388                                 }
 389                                 bp = cp;
 390                                 passno = 1;
 391
 392 again:
 393                                 for (; isspace(*bp); bp++)
 394                                         continue;
 395                                 if (*bp == '(') {
 396                                         int i;
 397
 398                                         for (bp++, i = 0;;) {
 399                                                 switch (*bp++) {
 400                                                 case '\0':
 401 invalid:
 402                                                         result = 0;
 403                                                         goto out;
 404                                                 case '\\':
 405                                                         if (*bp++ == '\0')
 406                                                                 goto invalid;
 407                                                         continue;
 408                                                 case '(':
 409                                                         i++;
 410                                                         /* and fall... */
 411                                                 default:
 412                                                         continue;
 413                                                 case ')':
 414                                                         if (--i < 0)
 415                                                                 break;
 416                                                         continue;
 417                                                 }
 418                                                 break;
 419                                         }
 420                                 }
 421                                 if (passno == 2) {
 422                                         if (*bp != '/')
 423                                                 goto invalid;
 424                                         bp++;
 425                                         passno = 3;
 426                                         goto again;
 427                                 }
 428                                 for (dp = bp; istoken(*dp); dp++)
 429                                         continue;
 430                                 c = *dp;
 431                                 *dp = '\0';
 432                                 if (!*bp)
 433                                         goto invalid;
 434                                 if (passno > 1) {
 435                                         if ((result = (mh_strcasecmp(bp,
 436                                                         "plain") != 0)))
 437                                                 goto out;
 438                                         *dp = c;
 439                                         for (dp++; isspace(*dp); dp++)
 440                                                 continue;
 441                                         if (*dp) {
 442                                                 if ((result = !uprf(dp,
 443                                                                 "charset")))
 444                                                         goto out;
 445                                                 dp += sizeof("charset") - 1;
 446                                                 while (isspace(*dp))
 447                                                         dp++;
 448                                                 if (*dp++ != '=')
 449                                                         goto invalid;
 450                                                 while (isspace(*dp))
 451                                                         dp++;
 452                                                 if (*dp == '"') {
 453                                                         if ((bp = strchr(++dp, '"')))
 454                                                                 *bp = '\0';
 455                                                 } else {
 456                                                         for (bp = dp; *bp; bp++)
 457                                                                 if (!istoken(*bp)) {
 458                                                                         *bp = '\0';
 459                                                                         break;
 460                                                                 }
 461                                                 }
 462                                         } else {
 463                                                 /* Default character set */
 464                                                 dp = "US-ASCII";
 465                                         }
 466                                         /* Check the character set */
 467                                         result = !check_charset(dp, strlen(dp));
 468                                 } else {
 469                                         if (!(result = (mh_strcasecmp(bp, "text") != 0))) {
 470                                                 *dp = c;
 471                                                 bp = dp;
 472                                                 passno = 2;
 473                                                 goto again;
 474                                         }
 475                                 }
 476 out:
 477                                 free(cp);
 478                                 if (result) {
 479                                         fclose(fp);
 480                                         return result;
 481                                 }
 482                                 break;
 483                         }
 484
 485                         /*
 486                         ** Check Content-Transfer-Encoding field
 487                         */
 488                         if (!mh_strcasecmp(name, ENCODING_FIELD)) {
 489                                 cp = getcpy(buf);
 490                                 while (state == FLDPLUS) {
 491                                         state = m_getfld(state, name, buf,
 492                                                         sizeof(buf), fp);
 493                                         cp = add(buf, cp);
 494                                 }
 495                                 for (bp = cp; isspace(*bp); bp++)
 496                                         continue;
 497                                 for (dp = bp; istoken(*dp); dp++)
 498                                         continue;
 499                                 *dp = '\0';
 500                                 result = (mh_strcasecmp(bp, "7bit")
 501                                            && mh_strcasecmp(bp, "8bit")
 502                                            && mh_strcasecmp(bp, "binary"));
 503
 504                                 free(cp);
 505                                 if (result) {
 506                                         fclose(fp);
 507                                         return result;
 508                                 }
 509                                 break;
 510                         }
 511
 512                         /*
 513                         ** Just skip the rest of this header
 514                         ** field and go to next one.
 515                         */
 516                         while (state == FLDPLUS)
 517                                 state = m_getfld(state, name, buf, sizeof(buf),
 518                                                 fp);
 519                         break;
 520
 521                         /*
 522                         ** We've passed the message header,
 523                         ** so message is just text.
 524                         */
 525                 default:
 526                         fclose(fp);
 527                         return 0;
 528                 }
 529         }
 530 }