diplodocus.org Git - nmh/blob - uip/show.c

   1
   2 /*
   3  * show.c -- show/list messages
   4  *
   5  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   6  * COPYRIGHT file in the root directory of the nmh distribution for
   7  * complete copyright information.
   8  */
   9
  10 #include <h/mh.h>
  11 #include <h/mime.h>
  12 #include <h/utils.h>
  13
  14 #define SHOW_SWITCHES \
  15     X("checkmime", 0, CHECKMIMESW) \
  16     X("nocheckmime", 0, NOCHECKMIMESW) \
  17     X("header", 0, HEADSW) \
  18     X("noheader", 0, NHEADSW) \
  19     X("form formfile", 0, FORMSW) \
  20     X("moreproc program", 0, PROGSW) \
  21     X("nomoreproc", 0, NPROGSW) \
  22     X("length lines", 0, LENSW) \
  23     X("width columns", 0, WIDTHSW) \
  24     X("showproc program", 0, SHOWSW) \
  25     X("showmimeproc program", 0, SHOWMIMESW) \
  26     X("noshowproc", 0, NSHOWSW) \
  27     X("draft", 0, DRFTSW) \
  28     X("file file", -4, FILESW) /* interface from showfile */ \
  29     X("fmtproc program", 0, FMTPROCSW) \
  30     X("nofmtproc", 0, NFMTPROCSW) \
  31     X("version", 0, VERSIONSW) \
  32     X("help", 0, HELPSW) \
  33
  34 #define X(sw, minchars, id) id,
  35 DEFINE_SWITCH_ENUM(SHOW);
  36 #undef X
  37
  38 #define X(sw, minchars, id) { sw, minchars, id },
  39 DEFINE_SWITCH_ARRAY(SHOW, switches);
  40 #undef X
  41
  42 /*
  43  * static prototypes
  44  */
  45 static int is_nontext(char *);
  46
  47 #define SHOW  0
  48 #define NEXT  1
  49 #define PREV  2
  50
  51
  52 int
  53 main (int argc, char **argv)
  54 {
  55     int draftsw = 0, headersw = 1;
  56     int nshow = 0, checkmime = 1, mime;
  57     int isdf = 0, mode = SHOW, msgnum;
  58     char *cp, *maildir, *file = NULL, *folder = NULL, *proc, *program;
  59     char buf[BUFSIZ], **argp, **arguments;
  60     struct msgs *mp = NULL;
  61     struct msgs_array msgs = { 0, 0, NULL };
  62     struct msgs_array vec = { 0, 0, NULL };
  63
  64     setlocale(LC_ALL, "");
  65     invo_name = r1bindex (argv[0], '/');
  66
  67     /* read user profile/context */
  68     context_read();
  69
  70     if (!strcasecmp (invo_name, "next")) {
  71         mode = NEXT;
  72     } else if (!strcasecmp (invo_name, "prev")) {
  73         mode = PREV;
  74     }
  75     arguments = getarguments (invo_name, argc, argv, 1);
  76     argp = arguments;
  77
  78     while ((cp = *argp++)) {
  79         if (*cp == '-') {
  80             switch (smatch (++cp, switches)) {
  81                 case AMBIGSW:
  82                     ambigsw (cp, switches);
  83                     done (1);
  84                 case UNKWNSW:
  85                 case NPROGSW:
  86                 case NFMTPROCSW:
  87                     app_msgarg(&vec, --cp);
  88                     continue;
  89
  90                 case HELPSW:
  91                     snprintf (buf, sizeof(buf),
  92                         "%s [+folder] %s[switches] [switches for showproc]",
  93                         invo_name, mode == SHOW ? "[msgs] ": "");
  94                     print_help (buf, switches, 1);
  95                     done (0);
  96                 case VERSIONSW:
  97                     print_version(invo_name);
  98                     done (0);
  99
 100                 case DRFTSW:
 101                     if (file)
 102                         adios (NULL, "only one file at a time!");
 103                     draftsw++;
 104                     if (mode == SHOW)
 105                         continue;
 106 usage:
 107                     adios (NULL,
 108                             "usage: %s [+folder] [switches] [switches for showproc]",
 109                             invo_name);
 110                 case FILESW:
 111                     if (mode != SHOW)
 112                         goto usage;
 113                     if (draftsw || file)
 114                         adios (NULL, "only one file at a time!");
 115                     if (!(cp = *argp++) || *cp == '-')
 116                         adios (NULL, "missing argument to %s", argp[-2]);
 117                     file = path (cp, TFILE);
 118                     continue;
 119
 120                 case HEADSW:
 121                     headersw++;
 122                     continue;
 123                 case NHEADSW:
 124                     headersw = 0;
 125                     continue;
 126
 127                 case FORMSW:
 128                     app_msgarg(&vec, --cp);
 129                     if (!(cp = *argp++) || *cp == '-')
 130                         adios (NULL, "missing argument to %s", argp[-2]);
 131                     app_msgarg(&vec, getcpy (etcpath(cp)));
 132                     continue;
 133
 134                 case PROGSW:
 135                 case LENSW:
 136                 case WIDTHSW:
 137                 case FMTPROCSW:
 138                     app_msgarg(&vec, --cp);
 139                     if (!(cp = *argp++) || *cp == '-')
 140                         adios (NULL, "missing argument to %s", argp[-2]);
 141                     app_msgarg(&vec, cp);
 142                     continue;
 143
 144                 case SHOWSW:
 145                     if (!(showproc = *argp++) || *showproc == '-')
 146                         adios (NULL, "missing argument to %s", argp[-2]);
 147                     nshow = 0;
 148                     continue;
 149                 case NSHOWSW:
 150                     nshow++;
 151                     continue;
 152
 153                 case SHOWMIMESW:
 154                     if (!(showmimeproc = *argp++) || *showmimeproc == '-')
 155                         adios (NULL, "missing argument to %s", argp[-2]);
 156                     nshow = 0;
 157                     continue;
 158                 case CHECKMIMESW:
 159                     checkmime++;
 160                     continue;
 161                 case NOCHECKMIMESW:
 162                     checkmime = 0;
 163                     continue;
 164             }
 165         }
 166         if (*cp == '+' || *cp == '@') {
 167             if (folder)
 168                 adios (NULL, "only one folder at a time!");
 169             else
 170                 folder = pluspath (cp);
 171         } else {
 172             if (mode != SHOW)
 173                 goto usage;
 174             else
 175                 app_msgarg(&msgs, cp);
 176         }
 177     }
 178
 179     if (!context_find ("path"))
 180         free (path ("./", TFOLDER));
 181
 182     if (draftsw || file) {
 183         if (msgs.size)
 184             adios (NULL, "only one file at a time!");
 185         if (draftsw)
 186             app_msgarg(&vec, getcpy (m_draft (folder, NULL, 1, &isdf)));
 187         else
 188             app_msgarg(&vec, file);
 189         goto go_to_it;
 190     }
 191
 192     if (!msgs.size) {
 193         switch (mode) {
 194             case NEXT:
 195                 app_msgarg(&msgs, "next");
 196                 break;
 197             case PREV:
 198                 app_msgarg(&msgs, "prev");
 199                 break;
 200             default:
 201                 app_msgarg(&msgs, "cur");
 202                 break;
 203         }
 204     }
 205
 206     if (!folder)
 207         folder = getfolder (1);
 208     maildir = m_maildir (folder);
 209
 210     if (chdir (maildir) == NOTOK)
 211         adios (maildir, "unable to change directory to");
 212
 213     /* read folder and create message structure */
 214     if (!(mp = folder_read (folder, 1)))
 215         adios (NULL, "unable to read folder %s", folder);
 216
 217     /* check for empty folder */
 218     if (mp->nummsg == 0)
 219         adios (NULL, "no messages in %s", folder);
 220
 221     /* parse all the message ranges/sequences and set SELECTED */
 222     for (msgnum = 0; msgnum < msgs.size; msgnum++)
 223         if (!m_convert (mp, msgs.msgs[msgnum]))
 224             done (1);
 225
 226     /*
 227      * Set the SELECT_UNSEEN bit for all the SELECTED messages,
 228      * since we will use that as a tag to know which messages
 229      * to remove from the "unseen" sequence.
 230      */
 231     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 232         if (is_selected(mp, msgnum))
 233             set_unseen (mp, msgnum);
 234
 235     seq_setprev (mp);           /* set the Previous-Sequence */
 236     seq_setunseen (mp, 1);      /* unset the Unseen-Sequence */
 237
 238     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 239         if (is_selected(mp, msgnum))
 240             app_msgarg(&vec, getcpy (m_name (msgnum)));
 241
 242     seq_setcur (mp, mp->hghsel);        /* update current message  */
 243     seq_save (mp);                      /* synchronize sequences   */
 244     context_replace (pfolder, folder);  /* update current folder   */
 245     context_save ();                    /* save the context file   */
 246
 247     if (headersw && vec.size == 1)
 248         printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 249
 250 go_to_it: ;
 251     fflush (stdout);
 252
 253     /*
 254      * Decide which "proc" to use
 255      */
 256     mime = 0;
 257     if (nshow) {
 258         proc = catproc;
 259     } else {
 260         /* check if any messages are non-text MIME messages */
 261         if (checkmime) {
 262             if (!draftsw && !file) {
 263                 /* loop through selected messages and check for MIME */
 264                 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 265                     if (is_selected (mp, msgnum) && is_nontext (m_name (msgnum))) {
 266                         mime = 1;
 267                         break;
 268                     }
 269             } else {
 270                 /* check the file or draft for MIME */
 271                 if (is_nontext (vec.msgs[vec.size - 1]))
 272                     mime = 1;
 273             }
 274         }
 275
 276         /* Set the "proc" */
 277         if (mime)
 278             proc = showmimeproc;
 279         else
 280             proc = showproc;
 281     }
 282
 283     if (folder && !draftsw && !file)
 284         m_putenv ("mhfolder", folder);
 285
 286     if (strcmp (r1bindex (proc, '/'), "mhn") == 0) {
 287         /* Add "-file" if showing file or draft, */
 288         if (draftsw || file) {
 289             app_msgarg(&vec, vec.msgs[vec.size - 1]);
 290             vec.msgs[vec.size - 2] = "-file";
 291         }
 292         /* and add -show for backward compatibility */
 293         app_msgarg(&vec, "-show");
 294     } else if (strcmp (r1bindex (proc, '/'), "mhshow") == 0) {
 295         /* If "mhshow", add "-file" if showing file or draft. */
 296         if (draftsw || file) {
 297             app_msgarg(&vec, vec.msgs[vec.size - 1]);
 298             vec.msgs[vec.size - 2] = "-file";
 299         }
 300     } else if (strcmp (r1bindex (proc, '/'), "mhl") == 0) {
 301         /* If "mhl", then run it internally */
 302         argsplit_insert(&vec, "mhl", &program);
 303         app_msgarg(&vec, NULL);
 304         mhl (vec.size, vec.msgs);
 305         done (0);
 306     }
 307
 308     argsplit_insert(&vec, proc, &program);
 309     app_msgarg(&vec, NULL);
 310     execvp (program, vec.msgs);
 311     adios (proc, "unable to exec");
 312     return 0;  /* dead code to satisfy the compiler */
 313 }
 314
 315
 316 /*
 317  * Check if a message or file contains any non-text parts
 318  */
 319 static int
 320 is_nontext (char *msgnam)
 321 {
 322     int result, state;
 323     char *bp, *dp, *cp;
 324     char buf[BUFSIZ], name[NAMESZ];
 325     FILE *fp;
 326     m_getfld_state_t gstate = 0;
 327
 328     if ((fp = fopen (msgnam, "r")) == NULL)
 329         return 0;
 330
 331     for (;;) {
 332         int bufsz = sizeof buf;
 333         switch (state = m_getfld (&gstate, name, buf, &bufsz, fp)) {
 334         case FLD:
 335         case FLDPLUS:
 336             /*
 337              * Check Content-Type field
 338              */
 339             if (!strcasecmp (name, TYPE_FIELD)) {
 340                 int passno;
 341                 char c;
 342
 343                 cp = add (buf, NULL);
 344                 while (state == FLDPLUS) {
 345                     bufsz = sizeof buf;
 346                     state = m_getfld (&gstate, name, buf, &bufsz, fp);
 347                     cp = add (buf, cp);
 348                 }
 349                 bp = cp;
 350                 passno = 1;
 351
 352 again:
 353                 for (; isspace ((unsigned char) *bp); bp++)
 354                     continue;
 355                 if (*bp == '(') {
 356                     int i;
 357
 358                     for (bp++, i = 0;;) {
 359                         switch (*bp++) {
 360                         case '\0':
 361 invalid:
 362                             result = 0;
 363                             goto out;
 364                         case '\\':
 365                             if (*bp++ == '\0')
 366                                 goto invalid;
 367                             continue;
 368                         case '(':
 369                             i++;
 370                             /* and fall... */
 371                         default:
 372                             continue;
 373                         case ')':
 374                             if (--i < 0)
 375                                 break;
 376                             continue;
 377                         }
 378                         break;
 379                     }
 380                 }
 381                 if (passno == 2) {
 382                     if (*bp != '/')
 383                         goto invalid;
 384                     bp++;
 385                     passno = 3;
 386                     goto again;
 387                 }
 388                 for (dp = bp; istoken (*dp); dp++)
 389                     continue;
 390                 c = *dp;
 391                 *dp = '\0';
 392                 if (!*bp)
 393                     goto invalid;
 394                 if (passno > 1) {
 395                     if ((result = (strcasecmp (bp, "plain") != 0)))
 396                         goto out;
 397                     *dp = c;
 398                     for (dp++; isspace ((unsigned char) *dp); dp++)
 399                         continue;
 400                     if (*dp) {
 401                         if ((result = !uprf (dp, "charset")))
 402                             goto out;
 403                         dp += sizeof("charset") - 1;
 404                         while (isspace ((unsigned char) *dp))
 405                             dp++;
 406                         if (*dp++ != '=')
 407                             goto invalid;
 408                         while (isspace ((unsigned char) *dp))
 409                             dp++;
 410                         if (*dp == '"') {
 411                             if ((bp = strchr(++dp, '"')))
 412                                 *bp = '\0';
 413                         } else {
 414                             for (bp = dp; *bp; bp++)
 415                                 if (!istoken (*bp)) {
 416                                     *bp = '\0';
 417                                     break;
 418                                 }
 419                         }
 420                     } else {
 421                         /* Default character set */
 422                         dp = "US-ASCII";
 423                     }
 424                     /* Check the character set */
 425                     result = !check_charset (dp, strlen (dp));
 426                 } else {
 427                     if (!(result = (strcasecmp (bp, "text") != 0))) {
 428                         *dp = c;
 429                         bp = dp;
 430                         passno = 2;
 431                         goto again;
 432                     }
 433                 }
 434 out:
 435                 free (cp);
 436                 if (result) {
 437                     fclose (fp);
 438                     m_getfld_state_destroy (&gstate);
 439                     return result;
 440                 }
 441                 break;
 442             }
 443
 444             /*
 445              * Check Content-Transfer-Encoding field
 446              */
 447             if (!strcasecmp (name, ENCODING_FIELD)) {
 448                 cp = add (buf, NULL);
 449                 while (state == FLDPLUS) {
 450                     bufsz = sizeof buf;
 451                     state = m_getfld (&gstate, name, buf, &bufsz, fp);
 452                     cp = add (buf, cp);
 453                 }
 454                 for (bp = cp; isspace ((unsigned char) *bp); bp++)
 455                     continue;
 456                 for (dp = bp; istoken ((unsigned char) *dp); dp++)
 457                     continue;
 458                 *dp = '\0';
 459                 result = (strcasecmp (bp, "7bit")
 460                        && strcasecmp (bp, "8bit")
 461                        && strcasecmp (bp, "binary"));
 462
 463                 free (cp);
 464                 if (result) {
 465                     fclose (fp);
 466                     m_getfld_state_destroy (&gstate);
 467                     return result;
 468                 }
 469                 break;
 470             }
 471
 472             /*
 473              * Just skip the rest of this header
 474              * field and go to next one.
 475              */
 476             while (state == FLDPLUS) {
 477                 bufsz = sizeof buf;
 478                 state = m_getfld (&gstate, name, buf, &bufsz, fp);
 479             }
 480             break;
 481
 482             /*
 483              * We've passed the message header,
 484              * so message is just text.
 485              */
 486         default:
 487             fclose (fp);
 488             m_getfld_state_destroy (&gstate);
 489             return 0;
 490         }
 491     }
 492 }