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