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/r1bindex.h"
  10 #include "sbr/uprf.h"
  11 #include "sbr/check_charset.h"
  12 #include "sbr/m_draft.h"
  13 #include "sbr/m_convert.h"
  14 #include "sbr/getfolder.h"
  15 #include "sbr/folder_read.h"
  16 #include "sbr/context_save.h"
  17 #include "sbr/context_replace.h"
  18 #include "sbr/context_find.h"
  19 #include "sbr/ambigsw.h"
  20 #include "sbr/path.h"
  21 #include "sbr/print_version.h"
  22 #include "sbr/print_help.h"
  23 #include "sbr/arglist.h"
  24 #include "sbr/error.h"
  25 #include "h/mime.h"
  26 #include "h/done.h"
  27 #include "h/utils.h"
  28 #include "sbr/m_maildir.h"
  29
  30 #define SHOW_SWITCHES \
  31     X("checkmime", 0, CHECKMIMESW) \
  32     X("nocheckmime", 0, NOCHECKMIMESW) \
  33     X("header", 0, HEADSW) \
  34     X("noheader", 0, NHEADSW) \
  35     X("form formfile", 0, FORMSW) \
  36     X("moreproc program", 0, PROGSW) \
  37     X("nomoreproc", 0, NPROGSW) \
  38     X("length lines", 0, LENSW) \
  39     X("width columns", 0, WIDTHSW) \
  40     X("showproc program", 0, SHOWSW) \
  41     X("showmimeproc program", 0, SHOWMIMESW) \
  42     X("noshowproc", 0, NSHOWSW) \
  43     X("draft", 0, DRFTSW) \
  44     X("file file", -4, FILESW) /* interface from showfile */ \
  45     X("fmtproc program", 0, FMTPROCSW) \
  46     X("nofmtproc", 0, NFMTPROCSW) \
  47     X("version", 0, VERSIONSW) \
  48     X("help", 0, HELPSW) \
  49     /*                          \
  50      * switches for mhlproc     \
  51      */                         \
  52     X("concat", 0, CONCATSW) \
  53     X("noconcat", 0, NCONCATSW) \
  54     /*                          \
  55      * switches for mhshow      \
  56      */                         \
  57     X("part number", 0, PARTSW) \
  58     X("type content", 0, TYPESW) \
  59     X("prefer content", 0, PREFERSW) \
  60     X("markform file", 0, MARKFORMSW) \
  61     X("rcache policy", 0, RCACHESW) \
  62     X("wcache policy", 0, WCACHESW) \
  63
  64 #define X(sw, minchars, id) id,
  65 DEFINE_SWITCH_ENUM(SHOW);
  66 #undef X
  67
  68 #define X(sw, minchars, id) { sw, minchars, id },
  69 DEFINE_SWITCH_ARRAY(SHOW, switches);
  70 #undef X
  71
  72 /*
  73  * static prototypes
  74  */
  75 static int is_nontext(char *);
  76
  77 #define SHOW  0
  78 #define NEXT  1
  79 #define PREV  2
  80
  81
  82 int
  83 main (int argc, char **argv)
  84 {
  85     bool draftsw = false;
  86     bool headersw = true;
  87     bool nshow = false;
  88     bool checkmime = true;
  89     bool mime = false;
  90     int isdf = 0, mode = SHOW, msgnum;
  91     char *cp, *maildir, *file = NULL, *folder = NULL, *proc, *program;
  92     char buf[BUFSIZ], **argp, **arguments;
  93     struct msgs *mp = NULL;
  94     struct msgs_array msgs = { 0, 0, NULL };
  95     struct msgs_array vec = { 0, 0, NULL }, non_mhl_vec = { 0, 0, NULL };
  96
  97     if (nmh_init(argv[0], true, true)) { return 1; }
  98
  99     if (!strcasecmp (invo_name, "next")) {
 100         mode = NEXT;
 101     } else if (!strcasecmp (invo_name, "prev")) {
 102         mode = PREV;
 103     }
 104     arguments = getarguments (invo_name, argc, argv, 1);
 105     argp = arguments;
 106
 107     while ((cp = *argp++)) {
 108         if (*cp == '-') {
 109             switch (smatch (++cp, switches)) {
 110                 case AMBIGSW:
 111                     ambigsw (cp, switches);
 112                     done (1);
 113
 114                 case HEADSW:
 115                     headersw = true;
 116                     goto non_mhl_switches;
 117                 case NHEADSW:
 118                     headersw = false;
 119                     /* FALLTHRU */
 120                 case CONCATSW:
 121                 case NCONCATSW:
 122 non_mhl_switches:
 123                     /* mhl can't handle these, so keep them separate. */
 124                     app_msgarg(&non_mhl_vec, --cp);
 125                     continue;
 126
 127                 case UNKWNSW:
 128                 case NPROGSW:
 129                 case NFMTPROCSW:
 130                     app_msgarg(&vec, --cp);
 131                     continue;
 132
 133                 case HELPSW:
 134                     snprintf (buf, sizeof(buf),
 135                         "%s [+folder] %s[switches] [switches for showproc]",
 136                         invo_name, mode == SHOW ? "[msgs] ": "");
 137                     print_help (buf, switches, 1);
 138                     done (0);
 139                 case VERSIONSW:
 140                     print_version(invo_name);
 141                     done (0);
 142
 143                 case DRFTSW:
 144                     if (file)
 145                         die("only one file at a time!");
 146                     draftsw = true;
 147                     if (mode == SHOW)
 148                         continue;
 149 usage:
 150                     die(                            "usage: %s [+folder] [switches] [switches for showproc]",
 151                             invo_name);
 152                 case FILESW:
 153                     if (mode != SHOW)
 154                         goto usage;
 155                     if (draftsw || file)
 156                         die("only one file at a time!");
 157                     if (!(cp = *argp++) || *cp == '-')
 158                         die("missing argument to %s", argp[-2]);
 159                     file = path (cp, TFILE);
 160                     continue;
 161
 162                 case FORMSW:
 163                     app_msgarg(&vec, --cp);
 164                     if (!(cp = *argp++) || *cp == '-')
 165                         die("missing argument to %s", argp[-2]);
 166                     app_msgarg(&vec, mh_xstrdup(etcpath(cp)));
 167                     continue;
 168
 169                 case PROGSW:
 170                 case LENSW:
 171                 case WIDTHSW:
 172                 case FMTPROCSW:
 173                 case PARTSW:
 174                 case TYPESW:
 175                 case PREFERSW:
 176                 case MARKFORMSW:
 177                 case RCACHESW:
 178                 case WCACHESW:
 179                     app_msgarg(&vec, --cp);
 180                     if (!(cp = *argp++) || *cp == '-')
 181                         die("missing argument to %s", argp[-2]);
 182                     app_msgarg(&vec, cp);
 183                     continue;
 184
 185                 case SHOWSW:
 186                     if (!(showproc = *argp++) || *showproc == '-')
 187                         die("missing argument to %s", argp[-2]);
 188                     nshow = false;
 189                     continue;
 190                 case NSHOWSW:
 191                     nshow = true;
 192                     continue;
 193
 194                 case SHOWMIMESW:
 195                     if (!(showmimeproc = *argp++) || *showmimeproc == '-')
 196                         die("missing argument to %s", argp[-2]);
 197                     nshow = false;
 198                     continue;
 199                 case CHECKMIMESW:
 200                     checkmime = true;
 201                     continue;
 202                 case NOCHECKMIMESW:
 203                     checkmime = false;
 204                     continue;
 205             }
 206         }
 207         if (*cp == '+' || *cp == '@') {
 208             if (folder)
 209                 die("only one folder at a time!");
 210             folder = pluspath (cp);
 211         } else {
 212             if (mode != SHOW)
 213                 goto usage;
 214             app_msgarg(&msgs, cp);
 215         }
 216     }
 217
 218     if (!context_find ("path"))
 219         free (path ("./", TFOLDER));
 220
 221     if (draftsw || file) {
 222         if (msgs.size)
 223             die("only one file at a time!");
 224         if (draftsw)
 225             app_msgarg(&vec, mh_xstrdup(m_draft(folder, NULL, 1, &isdf)));
 226         else
 227             app_msgarg(&vec, file);
 228         headersw = false;
 229         goto go_to_it;
 230     }
 231
 232     if (!msgs.size) {
 233         switch (mode) {
 234             case NEXT:
 235                 app_msgarg(&msgs, "next");
 236                 break;
 237             case PREV:
 238                 app_msgarg(&msgs, "prev");
 239                 break;
 240             default:
 241                 app_msgarg(&msgs, "cur");
 242                 break;
 243         }
 244     }
 245
 246     if (!folder)
 247         folder = getfolder (1);
 248     maildir = m_maildir (folder);
 249
 250     if (chdir (maildir) == NOTOK)
 251         adios (maildir, "unable to change directory to");
 252
 253     /* read folder and create message structure */
 254     if (!(mp = folder_read (folder, 1)))
 255         die("unable to read folder %s", folder);
 256
 257     /* check for empty folder */
 258     if (mp->nummsg == 0)
 259         die("no messages in %s", folder);
 260
 261     /* parse all the message ranges/sequences and set SELECTED */
 262     for (msgnum = 0; msgnum < msgs.size; msgnum++)
 263         if (!m_convert (mp, msgs.msgs[msgnum]))
 264             done (1);
 265
 266     /*
 267      * Set the SELECT_UNSEEN bit for all the SELECTED messages,
 268      * since we will use that as a tag to know which messages
 269      * to remove from the "unseen" sequence.
 270      */
 271     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 272         if (is_selected(mp, msgnum))
 273             set_unseen (mp, msgnum);
 274
 275     seq_setprev (mp);           /* set the Previous-Sequence */
 276     seq_setunseen (mp, 1);      /* unset the Unseen-Sequence */
 277
 278     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 279         if (is_selected(mp, msgnum))
 280             app_msgarg(&vec, mh_xstrdup(m_name (msgnum)));
 281
 282     seq_setcur (mp, mp->hghsel);        /* update current message  */
 283     seq_save (mp);                      /* synchronize sequences   */
 284     context_replace (pfolder, folder);  /* update current folder   */
 285     context_save ();                    /* save the context file   */
 286
 287 go_to_it: ;
 288
 289     /*
 290      * Decide which "proc" to use
 291      */
 292     if (nshow) {
 293         proc = catproc;
 294     } else {
 295         /* check if any messages are non-text MIME messages */
 296         if (! mime  &&  checkmime) {
 297             if (!draftsw && !file) {
 298                 /* loop through selected messages and check for MIME */
 299                 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 300                     if (is_selected (mp, msgnum) && is_nontext (m_name (msgnum))) {
 301                         mime = true;
 302                         break;
 303                     }
 304             } else {
 305                 /* check the file or draft for MIME */
 306                 if (is_nontext (vec.msgs[vec.size - 1]))
 307                     mime = true;
 308             }
 309         }
 310
 311         /* Set the "proc" */
 312         if (mime)
 313             proc = showmimeproc;
 314         else
 315             proc = showproc;
 316     }
 317
 318     if (folder && !draftsw && !file)
 319         setenv("mhfolder", folder, 1);
 320
 321     if (strcmp (r1bindex (proc, '/'), "cat") == 0) {
 322
 323         if (headersw && vec.size == 1)
 324             printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 325
 326     } else if (strcmp (r1bindex (proc, '/'), "mhl") == 0) {
 327
 328         if (headersw && vec.size == 1)
 329             printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 330
 331         /* If "mhl", then run it internally */
 332         argsplit_insert(&vec, "mhl", &program);
 333         app_msgarg(&vec, NULL);
 334         mhl (vec.size, vec.msgs);
 335         done (0);
 336
 337     } else {
 338         int i;
 339         char **mp;
 340
 341         for (i = 0, mp = non_mhl_vec.msgs; i < non_mhl_vec.size; ++i, ++mp) {
 342             if (draftsw || file) {
 343                 /* Insert the switch before the filename. */
 344                 app_msgarg(&vec, vec.msgs[vec.size - 1]);
 345                 vec.msgs[vec.size - 2] = *mp;
 346             } else {
 347                 app_msgarg(&vec, *mp);
 348             }
 349         }
 350
 351         if (strcmp (r1bindex (proc, '/'), "mhn") == 0) {
 352             /* Add "-file" if showing file or draft, */
 353             if (draftsw || file) {
 354                 app_msgarg(&vec, vec.msgs[vec.size - 1]);
 355                 vec.msgs[vec.size - 2] = "-file";
 356             }
 357             /* and add -show for backward compatibility */
 358             app_msgarg(&vec, "-show");
 359         } else if (strcmp (r1bindex (proc, '/'), "mhshow") == 0) {
 360             /* If "mhshow", add "-file" if showing file or draft. */
 361             if (draftsw || file) {
 362                 app_msgarg(&vec, vec.msgs[vec.size - 1]);
 363                 vec.msgs[vec.size - 2] = "-file";
 364             }
 365         } else {
 366             if (headersw && vec.size == 1)
 367                 printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 368         }
 369     }
 370
 371     fflush (stdout);
 372
 373     argsplit_insert(&vec, proc, &program);
 374     app_msgarg(&vec, NULL);
 375     execvp (program, vec.msgs);
 376     adios (proc, "unable to exec");
 377     return 0;  /* dead code to satisfy the compiler */
 378 }
 379
 380
 381 /*
 382  * Check if a message or file contains any non-text parts
 383  */
 384 static int
 385 is_nontext (char *msgnam)
 386 {
 387     int result, state;
 388     char *bp, *dp, *cp;
 389     char buf[NMH_BUFSIZ], name[NAMESZ];
 390     FILE *fp;
 391     m_getfld_state_t gstate;
 392
 393     if ((fp = fopen (msgnam, "r")) == NULL)
 394         return 0;
 395     gstate = m_getfld_state_init(fp);
 396     for (;;) {
 397         int bufsz = sizeof buf;
 398         switch (state = m_getfld2(&gstate, name, buf, &bufsz)) {
 399         case FLD:
 400         case FLDPLUS:
 401             /*
 402              * Check Content-Type field
 403              */
 404             if (!strcasecmp (name, TYPE_FIELD)) {
 405                 int passno;
 406                 char c;
 407
 408                 cp = mh_xstrdup(buf);
 409                 while (state == FLDPLUS) {
 410                     bufsz = sizeof buf;
 411                     state = m_getfld2(&gstate, name, buf, &bufsz);
 412                     cp = add (buf, cp);
 413                 }
 414                 bp = cp;
 415                 passno = 1;
 416
 417 again:
 418                 for (; isspace ((unsigned char) *bp); bp++)
 419                     continue;
 420                 if (*bp == '(') {
 421                     int i;
 422
 423                     for (bp++, i = 0;;) {
 424                         switch (*bp++) {
 425                         case '\0':
 426 invalid:
 427                             result = 0;
 428                             goto out;
 429                         case '\\':
 430                             if (*bp++ == '\0')
 431                                 goto invalid;
 432                             continue;
 433                         case '(':
 434                             i++;
 435                             continue;
 436                         default:
 437                             continue;
 438                         case ')':
 439                             if (--i < 0)
 440                                 break;
 441                             continue;
 442                         }
 443                         break;
 444                     }
 445                 }
 446                 if (passno == 2) {
 447                     if (*bp != '/')
 448                         goto invalid;
 449                     bp++;
 450                     passno = 3;
 451                     goto again;
 452                 }
 453                 for (dp = bp; istoken (*dp); dp++)
 454                     continue;
 455                 c = *dp;
 456                 *dp = '\0';
 457                 if (!*bp)
 458                     goto invalid;
 459                 if (passno > 1) {
 460                     if ((result = (strcasecmp (bp, "plain") != 0)))
 461                         goto out;
 462                     *dp = c;
 463                     for (dp++; isspace ((unsigned char) *dp); dp++)
 464                         continue;
 465                     if (*dp) {
 466                         if ((result = !uprf (dp, "charset")))
 467                             goto out;
 468                         dp += LEN("charset");
 469                         while (isspace ((unsigned char) *dp))
 470                             dp++;
 471                         if (*dp++ != '=')
 472                             goto invalid;
 473                         while (isspace ((unsigned char) *dp))
 474                             dp++;
 475                         if (*dp == '"') {
 476                             if ((bp = strchr(++dp, '"')))
 477                                 *bp = '\0';
 478                         } else {
 479                             for (bp = dp; *bp; bp++)
 480                                 if (!istoken (*bp)) {
 481                                     *bp = '\0';
 482                                     break;
 483                                 }
 484                         }
 485                     } else {
 486                         /* Default character set */
 487                         dp = "US-ASCII";
 488                     }
 489                     /* Check the character set */
 490                     result = !check_charset (dp, strlen (dp));
 491                 } else {
 492                     if (!(result = (strcasecmp (bp, "text") != 0))) {
 493                         *dp = c;
 494                         bp = dp;
 495                         passno = 2;
 496                         goto again;
 497                     }
 498                 }
 499 out:
 500                 free (cp);
 501                 if (result) {
 502                     fclose (fp);
 503                     m_getfld_state_destroy (&gstate);
 504                     return result;
 505                 }
 506                 break;
 507             }
 508
 509             /*
 510              * Check Content-Transfer-Encoding field
 511              */
 512             if (!strcasecmp (name, ENCODING_FIELD)) {
 513                 cp = mh_xstrdup(buf);
 514                 while (state == FLDPLUS) {
 515                     bufsz = sizeof buf;
 516                     state = m_getfld2(&gstate, name, buf, &bufsz);
 517                     cp = add (buf, cp);
 518                 }
 519                 for (bp = cp; isspace ((unsigned char) *bp); bp++)
 520                     continue;
 521                 for (dp = bp; istoken ((unsigned char) *dp); dp++)
 522                     continue;
 523                 *dp = '\0';
 524                 result = (strcasecmp (bp, "7bit")
 525                        && strcasecmp (bp, "8bit")
 526                        && strcasecmp (bp, "binary"));
 527
 528                 free (cp);
 529                 if (result) {
 530                     fclose (fp);
 531                     m_getfld_state_destroy (&gstate);
 532                     return result;
 533                 }
 534                 break;
 535             }
 536
 537             /*
 538              * Just skip the rest of this header
 539              * field and go to next one.
 540              */
 541             while (state == FLDPLUS) {
 542                 bufsz = sizeof buf;
 543                 state = m_getfld2(&gstate, name, buf, &bufsz);
 544             }
 545             break;
 546
 547             /*
 548              * We've passed the message header,
 549              * so message is just text.
 550              */
 551         default:
 552             fclose (fp);
 553             m_getfld_state_destroy (&gstate);
 554             return 0;
 555         }
 556     }
 557 }