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