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