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