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