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