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