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