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