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