diplodocus.org Git - nmh/blob - uip/show.c

   1 /* show.c -- show/list messages
   2  *
   3  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   4  * COPYRIGHT file in the root directory of the nmh distribution for
   5  * complete copyright information.
   6  */
   7
   8 #include <h/mh.h>
   9 #include "sbr/error.h"
  10 #include <h/mime.h>
  11 #include "h/done.h"
  12 #include <h/utils.h>
  13 #include "sbr/m_maildir.h"
  14
  15 #define SHOW_SWITCHES \
  16     X("checkmime", 0, CHECKMIMESW) \
  17     X("nocheckmime", 0, NOCHECKMIMESW) \
  18     X("header", 0, HEADSW) \
  19     X("noheader", 0, NHEADSW) \
  20     X("form formfile", 0, FORMSW) \
  21     X("moreproc program", 0, PROGSW) \
  22     X("nomoreproc", 0, NPROGSW) \
  23     X("length lines", 0, LENSW) \
  24     X("width columns", 0, WIDTHSW) \
  25     X("showproc program", 0, SHOWSW) \
  26     X("showmimeproc program", 0, SHOWMIMESW) \
  27     X("noshowproc", 0, NSHOWSW) \
  28     X("draft", 0, DRFTSW) \
  29     X("file file", -4, FILESW) /* interface from showfile */ \
  30     X("fmtproc program", 0, FMTPROCSW) \
  31     X("nofmtproc", 0, NFMTPROCSW) \
  32     X("version", 0, VERSIONSW) \
  33     X("help", 0, HELPSW) \
  34     /*                          \
  35      * switches for mhlproc     \
  36      */                         \
  37     X("concat", 0, CONCATSW) \
  38     X("noconcat", 0, NCONCATSW) \
  39     /*                          \
  40      * switches for mhshow      \
  41      */                         \
  42     X("part number", 0, PARTSW) \
  43     X("type content", 0, TYPESW) \
  44     X("prefer content", 0, PREFERSW) \
  45     X("markform file", 0, MARKFORMSW) \
  46     X("rcache policy", 0, RCACHESW) \
  47     X("wcache policy", 0, WCACHESW) \
  48
  49 #define X(sw, minchars, id) id,
  50 DEFINE_SWITCH_ENUM(SHOW);
  51 #undef X
  52
  53 #define X(sw, minchars, id) { sw, minchars, id },
  54 DEFINE_SWITCH_ARRAY(SHOW, switches);
  55 #undef X
  56
  57 /*
  58  * static prototypes
  59  */
  60 static int is_nontext(char *);
  61
  62 #define SHOW  0
  63 #define NEXT  1
  64 #define PREV  2
  65
  66
  67 int
  68 main (int argc, char **argv)
  69 {
  70     bool draftsw = false;
  71     bool headersw = true;
  72     bool nshow = false;
  73     bool checkmime = true;
  74     bool mime = false;
  75     int isdf = 0, mode = SHOW, msgnum;
  76     char *cp, *maildir, *file = NULL, *folder = NULL, *proc, *program;
  77     char buf[BUFSIZ], **argp, **arguments;
  78     struct msgs *mp = NULL;
  79     struct msgs_array msgs = { 0, 0, NULL };
  80     struct msgs_array vec = { 0, 0, NULL }, non_mhl_vec = { 0, 0, NULL };
  81
  82     if (nmh_init(argv[0], true, true)) { return 1; }
  83
  84     if (!strcasecmp (invo_name, "next")) {
  85         mode = NEXT;
  86     } else if (!strcasecmp (invo_name, "prev")) {
  87         mode = PREV;
  88     }
  89     arguments = getarguments (invo_name, argc, argv, 1);
  90     argp = arguments;
  91
  92     while ((cp = *argp++)) {
  93         if (*cp == '-') {
  94             switch (smatch (++cp, switches)) {
  95                 case AMBIGSW:
  96                     ambigsw (cp, switches);
  97                     done (1);
  98
  99                 case HEADSW:
 100                     headersw = true;
 101                     goto non_mhl_switches;
 102                 case NHEADSW:
 103                     headersw = false;
 104                     /* FALLTHRU */
 105                 case CONCATSW:
 106                 case NCONCATSW:
 107 non_mhl_switches:
 108                     /* mhl can't handle these, so keep them separate. */
 109                     app_msgarg(&non_mhl_vec, --cp);
 110                     continue;
 111
 112                 case UNKWNSW:
 113                 case NPROGSW:
 114                 case NFMTPROCSW:
 115                     app_msgarg(&vec, --cp);
 116                     continue;
 117
 118                 case HELPSW:
 119                     snprintf (buf, sizeof(buf),
 120                         "%s [+folder] %s[switches] [switches for showproc]",
 121                         invo_name, mode == SHOW ? "[msgs] ": "");
 122                     print_help (buf, switches, 1);
 123                     done (0);
 124                 case VERSIONSW:
 125                     print_version(invo_name);
 126                     done (0);
 127
 128                 case DRFTSW:
 129                     if (file)
 130                         die("only one file at a time!");
 131                     draftsw = true;
 132                     if (mode == SHOW)
 133                         continue;
 134 usage:
 135                     die(                            "usage: %s [+folder] [switches] [switches for showproc]",
 136                             invo_name);
 137                 case FILESW:
 138                     if (mode != SHOW)
 139                         goto usage;
 140                     if (draftsw || file)
 141                         die("only one file at a time!");
 142                     if (!(cp = *argp++) || *cp == '-')
 143                         die("missing argument to %s", argp[-2]);
 144                     file = path (cp, TFILE);
 145                     continue;
 146
 147                 case FORMSW:
 148                     app_msgarg(&vec, --cp);
 149                     if (!(cp = *argp++) || *cp == '-')
 150                         die("missing argument to %s", argp[-2]);
 151                     app_msgarg(&vec, mh_xstrdup(etcpath(cp)));
 152                     continue;
 153
 154                 case PROGSW:
 155                 case LENSW:
 156                 case WIDTHSW:
 157                 case FMTPROCSW:
 158                 case PARTSW:
 159                 case TYPESW:
 160                 case PREFERSW:
 161                 case MARKFORMSW:
 162                 case RCACHESW:
 163                 case WCACHESW:
 164                     app_msgarg(&vec, --cp);
 165                     if (!(cp = *argp++) || *cp == '-')
 166                         die("missing argument to %s", argp[-2]);
 167                     app_msgarg(&vec, cp);
 168                     continue;
 169
 170                 case SHOWSW:
 171                     if (!(showproc = *argp++) || *showproc == '-')
 172                         die("missing argument to %s", argp[-2]);
 173                     nshow = false;
 174                     continue;
 175                 case NSHOWSW:
 176                     nshow = true;
 177                     continue;
 178
 179                 case SHOWMIMESW:
 180                     if (!(showmimeproc = *argp++) || *showmimeproc == '-')
 181                         die("missing argument to %s", argp[-2]);
 182                     nshow = false;
 183                     continue;
 184                 case CHECKMIMESW:
 185                     checkmime = true;
 186                     continue;
 187                 case NOCHECKMIMESW:
 188                     checkmime = false;
 189                     continue;
 190             }
 191         }
 192         if (*cp == '+' || *cp == '@') {
 193             if (folder)
 194                 die("only one folder at a time!");
 195             folder = pluspath (cp);
 196         } else {
 197             if (mode != SHOW)
 198                 goto usage;
 199             app_msgarg(&msgs, cp);
 200         }
 201     }
 202
 203     if (!context_find ("path"))
 204         free (path ("./", TFOLDER));
 205
 206     if (draftsw || file) {
 207         if (msgs.size)
 208             die("only one file at a time!");
 209         if (draftsw)
 210             app_msgarg(&vec, mh_xstrdup(m_draft(folder, NULL, 1, &isdf)));
 211         else
 212             app_msgarg(&vec, file);
 213         headersw = false;
 214         goto go_to_it;
 215     }
 216
 217     if (!msgs.size) {
 218         switch (mode) {
 219             case NEXT:
 220                 app_msgarg(&msgs, "next");
 221                 break;
 222             case PREV:
 223                 app_msgarg(&msgs, "prev");
 224                 break;
 225             default:
 226                 app_msgarg(&msgs, "cur");
 227                 break;
 228         }
 229     }
 230
 231     if (!folder)
 232         folder = getfolder (1);
 233     maildir = m_maildir (folder);
 234
 235     if (chdir (maildir) == NOTOK)
 236         adios (maildir, "unable to change directory to");
 237
 238     /* read folder and create message structure */
 239     if (!(mp = folder_read (folder, 1)))
 240         die("unable to read folder %s", folder);
 241
 242     /* check for empty folder */
 243     if (mp->nummsg == 0)
 244         die("no messages in %s", folder);
 245
 246     /* parse all the message ranges/sequences and set SELECTED */
 247     for (msgnum = 0; msgnum < msgs.size; msgnum++)
 248         if (!m_convert (mp, msgs.msgs[msgnum]))
 249             done (1);
 250
 251     /*
 252      * Set the SELECT_UNSEEN bit for all the SELECTED messages,
 253      * since we will use that as a tag to know which messages
 254      * to remove from the "unseen" sequence.
 255      */
 256     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 257         if (is_selected(mp, msgnum))
 258             set_unseen (mp, msgnum);
 259
 260     seq_setprev (mp);           /* set the Previous-Sequence */
 261     seq_setunseen (mp, 1);      /* unset the Unseen-Sequence */
 262
 263     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 264         if (is_selected(mp, msgnum))
 265             app_msgarg(&vec, mh_xstrdup(m_name (msgnum)));
 266
 267     seq_setcur (mp, mp->hghsel);        /* update current message  */
 268     seq_save (mp);                      /* synchronize sequences   */
 269     context_replace (pfolder, folder);  /* update current folder   */
 270     context_save ();                    /* save the context file   */
 271
 272 go_to_it: ;
 273
 274     /*
 275      * Decide which "proc" to use
 276      */
 277     if (nshow) {
 278         proc = catproc;
 279     } else {
 280         /* check if any messages are non-text MIME messages */
 281         if (! mime  &&  checkmime) {
 282             if (!draftsw && !file) {
 283                 /* loop through selected messages and check for MIME */
 284                 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 285                     if (is_selected (mp, msgnum) && is_nontext (m_name (msgnum))) {
 286                         mime = true;
 287                         break;
 288                     }
 289             } else {
 290                 /* check the file or draft for MIME */
 291                 if (is_nontext (vec.msgs[vec.size - 1]))
 292                     mime = true;
 293             }
 294         }
 295
 296         /* Set the "proc" */
 297         if (mime)
 298             proc = showmimeproc;
 299         else
 300             proc = showproc;
 301     }
 302
 303     if (folder && !draftsw && !file)
 304         setenv("mhfolder", folder, 1);
 305
 306     if (strcmp (r1bindex (proc, '/'), "cat") == 0) {
 307
 308         if (headersw && vec.size == 1)
 309             printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 310
 311     } else if (strcmp (r1bindex (proc, '/'), "mhl") == 0) {
 312
 313         if (headersw && vec.size == 1)
 314             printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 315
 316         /* If "mhl", then run it internally */
 317         argsplit_insert(&vec, "mhl", &program);
 318         app_msgarg(&vec, NULL);
 319         mhl (vec.size, vec.msgs);
 320         done (0);
 321
 322     } else {
 323         int i;
 324         char **mp;
 325
 326         for (i = 0, mp = non_mhl_vec.msgs; i < non_mhl_vec.size; ++i, ++mp) {
 327             if (draftsw || file) {
 328                 /* Insert the switch before the filename. */
 329                 app_msgarg(&vec, vec.msgs[vec.size - 1]);
 330                 vec.msgs[vec.size - 2] = *mp;
 331             } else {
 332                 app_msgarg(&vec, *mp);
 333             }
 334         }
 335
 336         if (strcmp (r1bindex (proc, '/'), "mhn") == 0) {
 337             /* Add "-file" if showing file or draft, */
 338             if (draftsw || file) {
 339                 app_msgarg(&vec, vec.msgs[vec.size - 1]);
 340                 vec.msgs[vec.size - 2] = "-file";
 341             }
 342             /* and add -show for backward compatibility */
 343             app_msgarg(&vec, "-show");
 344         } else if (strcmp (r1bindex (proc, '/'), "mhshow") == 0) {
 345             /* If "mhshow", add "-file" if showing file or draft. */
 346             if (draftsw || file) {
 347                 app_msgarg(&vec, vec.msgs[vec.size - 1]);
 348                 vec.msgs[vec.size - 2] = "-file";
 349             }
 350         } else {
 351             if (headersw && vec.size == 1)
 352                 printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 353         }
 354     }
 355
 356     fflush (stdout);
 357
 358     argsplit_insert(&vec, proc, &program);
 359     app_msgarg(&vec, NULL);
 360     execvp (program, vec.msgs);
 361     adios (proc, "unable to exec");
 362     return 0;  /* dead code to satisfy the compiler */
 363 }
 364
 365
 366 /*
 367  * Check if a message or file contains any non-text parts
 368  */
 369 static int
 370 is_nontext (char *msgnam)
 371 {
 372     int result, state;
 373     char *bp, *dp, *cp;
 374     char buf[NMH_BUFSIZ], name[NAMESZ];
 375     FILE *fp;
 376     m_getfld_state_t gstate;
 377
 378     if ((fp = fopen (msgnam, "r")) == NULL)
 379         return 0;
 380     gstate = m_getfld_state_init(fp);
 381     for (;;) {
 382         int bufsz = sizeof buf;
 383         switch (state = m_getfld2(&gstate, name, buf, &bufsz)) {
 384         case FLD:
 385         case FLDPLUS:
 386             /*
 387              * Check Content-Type field
 388              */
 389             if (!strcasecmp (name, TYPE_FIELD)) {
 390                 int passno;
 391                 char c;
 392
 393                 cp = mh_xstrdup(buf);
 394                 while (state == FLDPLUS) {
 395                     bufsz = sizeof buf;
 396                     state = m_getfld2(&gstate, name, buf, &bufsz);
 397                     cp = add (buf, cp);
 398                 }
 399                 bp = cp;
 400                 passno = 1;
 401
 402 again:
 403                 for (; isspace ((unsigned char) *bp); bp++)
 404                     continue;
 405                 if (*bp == '(') {
 406                     int i;
 407
 408                     for (bp++, i = 0;;) {
 409                         switch (*bp++) {
 410                         case '\0':
 411 invalid:
 412                             result = 0;
 413                             goto out;
 414                         case '\\':
 415                             if (*bp++ == '\0')
 416                                 goto invalid;
 417                             continue;
 418                         case '(':
 419                             i++;
 420                             continue;
 421                         default:
 422                             continue;
 423                         case ')':
 424                             if (--i < 0)
 425                                 break;
 426                             continue;
 427                         }
 428                         break;
 429                     }
 430                 }
 431                 if (passno == 2) {
 432                     if (*bp != '/')
 433                         goto invalid;
 434                     bp++;
 435                     passno = 3;
 436                     goto again;
 437                 }
 438                 for (dp = bp; istoken (*dp); dp++)
 439                     continue;
 440                 c = *dp;
 441                 *dp = '\0';
 442                 if (!*bp)
 443                     goto invalid;
 444                 if (passno > 1) {
 445                     if ((result = (strcasecmp (bp, "plain") != 0)))
 446                         goto out;
 447                     *dp = c;
 448                     for (dp++; isspace ((unsigned char) *dp); dp++)
 449                         continue;
 450                     if (*dp) {
 451                         if ((result = !uprf (dp, "charset")))
 452                             goto out;
 453                         dp += LEN("charset");
 454                         while (isspace ((unsigned char) *dp))
 455                             dp++;
 456                         if (*dp++ != '=')
 457                             goto invalid;
 458                         while (isspace ((unsigned char) *dp))
 459                             dp++;
 460                         if (*dp == '"') {
 461                             if ((bp = strchr(++dp, '"')))
 462                                 *bp = '\0';
 463                         } else {
 464                             for (bp = dp; *bp; bp++)
 465                                 if (!istoken (*bp)) {
 466                                     *bp = '\0';
 467                                     break;
 468                                 }
 469                         }
 470                     } else {
 471                         /* Default character set */
 472                         dp = "US-ASCII";
 473                     }
 474                     /* Check the character set */
 475                     result = !check_charset (dp, strlen (dp));
 476                 } else {
 477                     if (!(result = (strcasecmp (bp, "text") != 0))) {
 478                         *dp = c;
 479                         bp = dp;
 480                         passno = 2;
 481                         goto again;
 482                     }
 483                 }
 484 out:
 485                 free (cp);
 486                 if (result) {
 487                     fclose (fp);
 488                     m_getfld_state_destroy (&gstate);
 489                     return result;
 490                 }
 491                 break;
 492             }
 493
 494             /*
 495              * Check Content-Transfer-Encoding field
 496              */
 497             if (!strcasecmp (name, ENCODING_FIELD)) {
 498                 cp = mh_xstrdup(buf);
 499                 while (state == FLDPLUS) {
 500                     bufsz = sizeof buf;
 501                     state = m_getfld2(&gstate, name, buf, &bufsz);
 502                     cp = add (buf, cp);
 503                 }
 504                 for (bp = cp; isspace ((unsigned char) *bp); bp++)
 505                     continue;
 506                 for (dp = bp; istoken ((unsigned char) *dp); dp++)
 507                     continue;
 508                 *dp = '\0';
 509                 result = (strcasecmp (bp, "7bit")
 510                        && strcasecmp (bp, "8bit")
 511                        && strcasecmp (bp, "binary"));
 512
 513                 free (cp);
 514                 if (result) {
 515                     fclose (fp);
 516                     m_getfld_state_destroy (&gstate);
 517                     return result;
 518                 }
 519                 break;
 520             }
 521
 522             /*
 523              * Just skip the rest of this header
 524              * field and go to next one.
 525              */
 526             while (state == FLDPLUS) {
 527                 bufsz = sizeof buf;
 528                 state = m_getfld2(&gstate, name, buf, &bufsz);
 529             }
 530             break;
 531
 532             /*
 533              * We've passed the message header,
 534              * so message is just text.
 535              */
 536         default:
 537             fclose (fp);
 538             m_getfld_state_destroy (&gstate);
 539             return 0;
 540         }
 541     }
 542 }