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/arglist.h"
  10 #include "sbr/error.h"
  11 #include "h/mime.h"
  12 #include "h/done.h"
  13 #include "h/utils.h"
  14 #include "sbr/m_maildir.h"
  15
  16 #define SHOW_SWITCHES \
  17     X("checkmime", 0, CHECKMIMESW) \
  18     X("nocheckmime", 0, NOCHECKMIMESW) \
  19     X("header", 0, HEADSW) \
  20     X("noheader", 0, NHEADSW) \
  21     X("form formfile", 0, FORMSW) \
  22     X("moreproc program", 0, PROGSW) \
  23     X("nomoreproc", 0, NPROGSW) \
  24     X("length lines", 0, LENSW) \
  25     X("width columns", 0, WIDTHSW) \
  26     X("showproc program", 0, SHOWSW) \
  27     X("showmimeproc program", 0, SHOWMIMESW) \
  28     X("noshowproc", 0, NSHOWSW) \
  29     X("draft", 0, DRFTSW) \
  30     X("file file", -4, FILESW) /* interface from showfile */ \
  31     X("fmtproc program", 0, FMTPROCSW) \
  32     X("nofmtproc", 0, NFMTPROCSW) \
  33     X("version", 0, VERSIONSW) \
  34     X("help", 0, HELPSW) \
  35     /*                          \
  36      * switches for mhlproc     \
  37      */                         \
  38     X("concat", 0, CONCATSW) \
  39     X("noconcat", 0, NCONCATSW) \
  40     /*                          \
  41      * switches for mhshow      \
  42      */                         \
  43     X("part number", 0, PARTSW) \
  44     X("type content", 0, TYPESW) \
  45     X("prefer content", 0, PREFERSW) \
  46     X("markform file", 0, MARKFORMSW) \
  47     X("rcache policy", 0, RCACHESW) \
  48     X("wcache policy", 0, WCACHESW) \
  49
  50 #define X(sw, minchars, id) id,
  51 DEFINE_SWITCH_ENUM(SHOW);
  52 #undef X
  53
  54 #define X(sw, minchars, id) { sw, minchars, id },
  55 DEFINE_SWITCH_ARRAY(SHOW, switches);
  56 #undef X
  57
  58 /*
  59  * static prototypes
  60  */
  61 static int is_nontext(char *);
  62
  63 #define SHOW  0
  64 #define NEXT  1
  65 #define PREV  2
  66
  67
  68 int
  69 main (int argc, char **argv)
  70 {
  71     bool draftsw = false;
  72     bool headersw = true;
  73     bool nshow = false;
  74     bool checkmime = true;
  75     bool mime = false;
  76     int isdf = 0, mode = SHOW, msgnum;
  77     char *cp, *maildir, *file = NULL, *folder = NULL, *proc, *program;
  78     char buf[BUFSIZ], **argp, **arguments;
  79     struct msgs *mp = NULL;
  80     struct msgs_array msgs = { 0, 0, NULL };
  81     struct msgs_array vec = { 0, 0, NULL }, non_mhl_vec = { 0, 0, NULL };
  82
  83     if (nmh_init(argv[0], true, true)) { return 1; }
  84
  85     if (!strcasecmp (invo_name, "next")) {
  86         mode = NEXT;
  87     } else if (!strcasecmp (invo_name, "prev")) {
  88         mode = PREV;
  89     }
  90     arguments = getarguments (invo_name, argc, argv, 1);
  91     argp = arguments;
  92
  93     while ((cp = *argp++)) {
  94         if (*cp == '-') {
  95             switch (smatch (++cp, switches)) {
  96                 case AMBIGSW:
  97                     ambigsw (cp, switches);
  98                     done (1);
  99
 100                 case HEADSW:
 101                     headersw = true;
 102                     goto non_mhl_switches;
 103                 case NHEADSW:
 104                     headersw = false;
 105                     /* FALLTHRU */
 106                 case CONCATSW:
 107                 case NCONCATSW:
 108 non_mhl_switches:
 109                     /* mhl can't handle these, so keep them separate. */
 110                     app_msgarg(&non_mhl_vec, --cp);
 111                     continue;
 112
 113                 case UNKWNSW:
 114                 case NPROGSW:
 115                 case NFMTPROCSW:
 116                     app_msgarg(&vec, --cp);
 117                     continue;
 118
 119                 case HELPSW:
 120                     snprintf (buf, sizeof(buf),
 121                         "%s [+folder] %s[switches] [switches for showproc]",
 122                         invo_name, mode == SHOW ? "[msgs] ": "");
 123                     print_help (buf, switches, 1);
 124                     done (0);
 125                 case VERSIONSW:
 126                     print_version(invo_name);
 127                     done (0);
 128
 129                 case DRFTSW:
 130                     if (file)
 131                         die("only one file at a time!");
 132                     draftsw = true;
 133                     if (mode == SHOW)
 134                         continue;
 135 usage:
 136                     die(                            "usage: %s [+folder] [switches] [switches for showproc]",
 137                             invo_name);
 138                 case FILESW:
 139                     if (mode != SHOW)
 140                         goto usage;
 141                     if (draftsw || file)
 142                         die("only one file at a time!");
 143                     if (!(cp = *argp++) || *cp == '-')
 144                         die("missing argument to %s", argp[-2]);
 145                     file = path (cp, TFILE);
 146                     continue;
 147
 148                 case FORMSW:
 149                     app_msgarg(&vec, --cp);
 150                     if (!(cp = *argp++) || *cp == '-')
 151                         die("missing argument to %s", argp[-2]);
 152                     app_msgarg(&vec, mh_xstrdup(etcpath(cp)));
 153                     continue;
 154
 155                 case PROGSW:
 156                 case LENSW:
 157                 case WIDTHSW:
 158                 case FMTPROCSW:
 159                 case PARTSW:
 160                 case TYPESW:
 161                 case PREFERSW:
 162                 case MARKFORMSW:
 163                 case RCACHESW:
 164                 case WCACHESW:
 165                     app_msgarg(&vec, --cp);
 166                     if (!(cp = *argp++) || *cp == '-')
 167                         die("missing argument to %s", argp[-2]);
 168                     app_msgarg(&vec, cp);
 169                     continue;
 170
 171                 case SHOWSW:
 172                     if (!(showproc = *argp++) || *showproc == '-')
 173                         die("missing argument to %s", argp[-2]);
 174                     nshow = false;
 175                     continue;
 176                 case NSHOWSW:
 177                     nshow = true;
 178                     continue;
 179
 180                 case SHOWMIMESW:
 181                     if (!(showmimeproc = *argp++) || *showmimeproc == '-')
 182                         die("missing argument to %s", argp[-2]);
 183                     nshow = false;
 184                     continue;
 185                 case CHECKMIMESW:
 186                     checkmime = true;
 187                     continue;
 188                 case NOCHECKMIMESW:
 189                     checkmime = false;
 190                     continue;
 191             }
 192         }
 193         if (*cp == '+' || *cp == '@') {
 194             if (folder)
 195                 die("only one folder at a time!");
 196             folder = pluspath (cp);
 197         } else {
 198             if (mode != SHOW)
 199                 goto usage;
 200             app_msgarg(&msgs, cp);
 201         }
 202     }
 203
 204     if (!context_find ("path"))
 205         free (path ("./", TFOLDER));
 206
 207     if (draftsw || file) {
 208         if (msgs.size)
 209             die("only one file at a time!");
 210         if (draftsw)
 211             app_msgarg(&vec, mh_xstrdup(m_draft(folder, NULL, 1, &isdf)));
 212         else
 213             app_msgarg(&vec, file);
 214         headersw = false;
 215         goto go_to_it;
 216     }
 217
 218     if (!msgs.size) {
 219         switch (mode) {
 220             case NEXT:
 221                 app_msgarg(&msgs, "next");
 222                 break;
 223             case PREV:
 224                 app_msgarg(&msgs, "prev");
 225                 break;
 226             default:
 227                 app_msgarg(&msgs, "cur");
 228                 break;
 229         }
 230     }
 231
 232     if (!folder)
 233         folder = getfolder (1);
 234     maildir = m_maildir (folder);
 235
 236     if (chdir (maildir) == NOTOK)
 237         adios (maildir, "unable to change directory to");
 238
 239     /* read folder and create message structure */
 240     if (!(mp = folder_read (folder, 1)))
 241         die("unable to read folder %s", folder);
 242
 243     /* check for empty folder */
 244     if (mp->nummsg == 0)
 245         die("no messages in %s", folder);
 246
 247     /* parse all the message ranges/sequences and set SELECTED */
 248     for (msgnum = 0; msgnum < msgs.size; msgnum++)
 249         if (!m_convert (mp, msgs.msgs[msgnum]))
 250             done (1);
 251
 252     /*
 253      * Set the SELECT_UNSEEN bit for all the SELECTED messages,
 254      * since we will use that as a tag to know which messages
 255      * to remove from the "unseen" sequence.
 256      */
 257     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 258         if (is_selected(mp, msgnum))
 259             set_unseen (mp, msgnum);
 260
 261     seq_setprev (mp);           /* set the Previous-Sequence */
 262     seq_setunseen (mp, 1);      /* unset the Unseen-Sequence */
 263
 264     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 265         if (is_selected(mp, msgnum))
 266             app_msgarg(&vec, mh_xstrdup(m_name (msgnum)));
 267
 268     seq_setcur (mp, mp->hghsel);        /* update current message  */
 269     seq_save (mp);                      /* synchronize sequences   */
 270     context_replace (pfolder, folder);  /* update current folder   */
 271     context_save ();                    /* save the context file   */
 272
 273 go_to_it: ;
 274
 275     /*
 276      * Decide which "proc" to use
 277      */
 278     if (nshow) {
 279         proc = catproc;
 280     } else {
 281         /* check if any messages are non-text MIME messages */
 282         if (! mime  &&  checkmime) {
 283             if (!draftsw && !file) {
 284                 /* loop through selected messages and check for MIME */
 285                 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 286                     if (is_selected (mp, msgnum) && is_nontext (m_name (msgnum))) {
 287                         mime = true;
 288                         break;
 289                     }
 290             } else {
 291                 /* check the file or draft for MIME */
 292                 if (is_nontext (vec.msgs[vec.size - 1]))
 293                     mime = true;
 294             }
 295         }
 296
 297         /* Set the "proc" */
 298         if (mime)
 299             proc = showmimeproc;
 300         else
 301             proc = showproc;
 302     }
 303
 304     if (folder && !draftsw && !file)
 305         setenv("mhfolder", folder, 1);
 306
 307     if (strcmp (r1bindex (proc, '/'), "cat") == 0) {
 308
 309         if (headersw && vec.size == 1)
 310             printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 311
 312     } else if (strcmp (r1bindex (proc, '/'), "mhl") == 0) {
 313
 314         if (headersw && vec.size == 1)
 315             printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 316
 317         /* If "mhl", then run it internally */
 318         argsplit_insert(&vec, "mhl", &program);
 319         app_msgarg(&vec, NULL);
 320         mhl (vec.size, vec.msgs);
 321         done (0);
 322
 323     } else {
 324         int i;
 325         char **mp;
 326
 327         for (i = 0, mp = non_mhl_vec.msgs; i < non_mhl_vec.size; ++i, ++mp) {
 328             if (draftsw || file) {
 329                 /* Insert the switch before the filename. */
 330                 app_msgarg(&vec, vec.msgs[vec.size - 1]);
 331                 vec.msgs[vec.size - 2] = *mp;
 332             } else {
 333                 app_msgarg(&vec, *mp);
 334             }
 335         }
 336
 337         if (strcmp (r1bindex (proc, '/'), "mhn") == 0) {
 338             /* Add "-file" if showing file or draft, */
 339             if (draftsw || file) {
 340                 app_msgarg(&vec, vec.msgs[vec.size - 1]);
 341                 vec.msgs[vec.size - 2] = "-file";
 342             }
 343             /* and add -show for backward compatibility */
 344             app_msgarg(&vec, "-show");
 345         } else if (strcmp (r1bindex (proc, '/'), "mhshow") == 0) {
 346             /* If "mhshow", add "-file" if showing file or draft. */
 347             if (draftsw || file) {
 348                 app_msgarg(&vec, vec.msgs[vec.size - 1]);
 349                 vec.msgs[vec.size - 2] = "-file";
 350             }
 351         } else {
 352             if (headersw && vec.size == 1)
 353                 printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 354         }
 355     }
 356
 357     fflush (stdout);
 358
 359     argsplit_insert(&vec, proc, &program);
 360     app_msgarg(&vec, NULL);
 361     execvp (program, vec.msgs);
 362     adios (proc, "unable to exec");
 363     return 0;  /* dead code to satisfy the compiler */
 364 }
 365
 366
 367 /*
 368  * Check if a message or file contains any non-text parts
 369  */
 370 static int
 371 is_nontext (char *msgnam)
 372 {
 373     int result, state;
 374     char *bp, *dp, *cp;
 375     char buf[NMH_BUFSIZ], name[NAMESZ];
 376     FILE *fp;
 377     m_getfld_state_t gstate;
 378
 379     if ((fp = fopen (msgnam, "r")) == NULL)
 380         return 0;
 381     gstate = m_getfld_state_init(fp);
 382     for (;;) {
 383         int bufsz = sizeof buf;
 384         switch (state = m_getfld2(&gstate, name, buf, &bufsz)) {
 385         case FLD:
 386         case FLDPLUS:
 387             /*
 388              * Check Content-Type field
 389              */
 390             if (!strcasecmp (name, TYPE_FIELD)) {
 391                 int passno;
 392                 char c;
 393
 394                 cp = mh_xstrdup(buf);
 395                 while (state == FLDPLUS) {
 396                     bufsz = sizeof buf;
 397                     state = m_getfld2(&gstate, name, buf, &bufsz);
 398                     cp = add (buf, cp);
 399                 }
 400                 bp = cp;
 401                 passno = 1;
 402
 403 again:
 404                 for (; isspace ((unsigned char) *bp); bp++)
 405                     continue;
 406                 if (*bp == '(') {
 407                     int i;
 408
 409                     for (bp++, i = 0;;) {
 410                         switch (*bp++) {
 411                         case '\0':
 412 invalid:
 413                             result = 0;
 414                             goto out;
 415                         case '\\':
 416                             if (*bp++ == '\0')
 417                                 goto invalid;
 418                             continue;
 419                         case '(':
 420                             i++;
 421                             continue;
 422                         default:
 423                             continue;
 424                         case ')':
 425                             if (--i < 0)
 426                                 break;
 427                             continue;
 428                         }
 429                         break;
 430                     }
 431                 }
 432                 if (passno == 2) {
 433                     if (*bp != '/')
 434                         goto invalid;
 435                     bp++;
 436                     passno = 3;
 437                     goto again;
 438                 }
 439                 for (dp = bp; istoken (*dp); dp++)
 440                     continue;
 441                 c = *dp;
 442                 *dp = '\0';
 443                 if (!*bp)
 444                     goto invalid;
 445                 if (passno > 1) {
 446                     if ((result = (strcasecmp (bp, "plain") != 0)))
 447                         goto out;
 448                     *dp = c;
 449                     for (dp++; isspace ((unsigned char) *dp); dp++)
 450                         continue;
 451                     if (*dp) {
 452                         if ((result = !uprf (dp, "charset")))
 453                             goto out;
 454                         dp += LEN("charset");
 455                         while (isspace ((unsigned char) *dp))
 456                             dp++;
 457                         if (*dp++ != '=')
 458                             goto invalid;
 459                         while (isspace ((unsigned char) *dp))
 460                             dp++;
 461                         if (*dp == '"') {
 462                             if ((bp = strchr(++dp, '"')))
 463                                 *bp = '\0';
 464                         } else {
 465                             for (bp = dp; *bp; bp++)
 466                                 if (!istoken (*bp)) {
 467                                     *bp = '\0';
 468                                     break;
 469                                 }
 470                         }
 471                     } else {
 472                         /* Default character set */
 473                         dp = "US-ASCII";
 474                     }
 475                     /* Check the character set */
 476                     result = !check_charset (dp, strlen (dp));
 477                 } else {
 478                     if (!(result = (strcasecmp (bp, "text") != 0))) {
 479                         *dp = c;
 480                         bp = dp;
 481                         passno = 2;
 482                         goto again;
 483                     }
 484                 }
 485 out:
 486                 free (cp);
 487                 if (result) {
 488                     fclose (fp);
 489                     m_getfld_state_destroy (&gstate);
 490                     return result;
 491                 }
 492                 break;
 493             }
 494
 495             /*
 496              * Check Content-Transfer-Encoding field
 497              */
 498             if (!strcasecmp (name, ENCODING_FIELD)) {
 499                 cp = mh_xstrdup(buf);
 500                 while (state == FLDPLUS) {
 501                     bufsz = sizeof buf;
 502                     state = m_getfld2(&gstate, name, buf, &bufsz);
 503                     cp = add (buf, cp);
 504                 }
 505                 for (bp = cp; isspace ((unsigned char) *bp); bp++)
 506                     continue;
 507                 for (dp = bp; istoken ((unsigned char) *dp); dp++)
 508                     continue;
 509                 *dp = '\0';
 510                 result = (strcasecmp (bp, "7bit")
 511                        && strcasecmp (bp, "8bit")
 512                        && strcasecmp (bp, "binary"));
 513
 514                 free (cp);
 515                 if (result) {
 516                     fclose (fp);
 517                     m_getfld_state_destroy (&gstate);
 518                     return result;
 519                 }
 520                 break;
 521             }
 522
 523             /*
 524              * Just skip the rest of this header
 525              * field and go to next one.
 526              */
 527             while (state == FLDPLUS) {
 528                 bufsz = sizeof buf;
 529                 state = m_getfld2(&gstate, name, buf, &bufsz);
 530             }
 531             break;
 532
 533             /*
 534              * We've passed the message header,
 535              * so message is just text.
 536              */
 537         default:
 538             fclose (fp);
 539             m_getfld_state_destroy (&gstate);
 540             return 0;
 541         }
 542     }
 543 }