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