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