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