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

   1
   2 /*
   3  * inc.c -- incorporate messages from a maildrop into a folder
   4  *
   5  * $Id$
   6  *
   7  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   8  * COPYRIGHT file in the root directory of the nmh distribution for
   9  * complete copyright information.
  10  */
  11
  12 #ifdef MAILGROUP
  13 /* Revised: Sat Apr 14 17:08:17 PDT 1990 (marvit@hplabs)
  14  *    Added hpux hacks to set and reset gid to be "mail" as needed. The reset
  15  *    is necessary so inc'ed mail is the group of the inc'er, rather than
  16  *    "mail". We setgid to egid only when [un]locking the mail file. This
  17  *    is also a major security precaution which will not be explained here.
  18  *
  19  * Fri Feb  7 16:04:57 PST 1992         John Romine <bug-mh@ics.uci.edu>
  20  *   NB: I'm not 100% sure that this setgid stuff is secure even now.
  21  *
  22  * See the *GROUPPRIVS() macros later. I'm reasonably happy with the setgid
  23  * attribute. Running setuid root is probably not a terribly good idea, though.
  24  *       -- Peter Maydell <pmaydell@chiark.greenend.org.uk>, 04/1998
  25  *
  26  * Peter Maydell's patch slightly modified for nmh 0.28-pre2.
  27  * Ruud de Rooij <ruud@debian.org>  Wed, 22 Jul 1998 13:24:22 +0200
  28  */
  29 #endif
  30
  31 #include <h/mh.h>
  32 #include <fcntl.h>
  33
  34 #ifdef POP
  35 # include <h/dropsbr.h>
  36 # include <h/popsbr.h>
  37 #endif
  38
  39 #ifdef HESIOD
  40 # include <hesiod.h>
  41 #endif
  42
  43 #include <h/fmt_scan.h>
  44 #include <h/scansbr.h>
  45 #include <h/signals.h>
  46 #include <h/tws.h>
  47 #include <h/mts.h>
  48 #include <errno.h>
  49 #include <signal.h>
  50
  51 #ifndef POP
  52 # define POPminc(a) (a)
  53 #else
  54 # define POPminc(a)  0
  55 #endif
  56
  57 #ifndef RPOP
  58 # define RPOPminc(a) (a)
  59 #else
  60 # define RPOPminc(a)  0
  61 #endif
  62
  63 #ifndef APOP
  64 # define APOPminc(a) (a)
  65 #else
  66 # define APOPminc(a)  0
  67 #endif
  68
  69 #ifndef KPOP
  70 # define KPOPminc(a) (a)
  71 #else
  72 # define KPOPminc(a)  0
  73 #endif
  74
  75 #ifndef CYRUS_SASL
  76 # define SASLminc(a) (a)
  77 #else
  78 # define SASLminc(a)  0
  79 #endif
  80
  81 static struct swit switches[] = {
  82 #define AUDSW                      0
  83     { "audit audit-file", 0 },
  84 #define NAUDSW                     1
  85     { "noaudit", 0 },
  86 #define CHGSW                      2
  87     { "changecur", 0 },
  88 #define NCHGSW                     3
  89     { "nochangecur", 0 },
  90 #define FILESW                     4
  91     { "file name", 0 },
  92 #define FORMSW                     5
  93     { "form formatfile", 0 },
  94 #define FMTSW                      6
  95     { "format string", 5 },
  96 #define HOSTSW                     7
  97     { "host hostname", POPminc (-4) },
  98 #define USERSW                     8
  99     { "user username", POPminc (-4) },
 100 #define PACKSW                     9
 101     { "pack file", POPminc (-4) },
 102 #define NPACKSW                   10
 103     { "nopack", POPminc (-6) },
 104 #define APOPSW                    11
 105     { "apop", APOPminc (-4) },
 106 #define NAPOPSW                   12
 107     { "noapop", APOPminc (-6) },
 108 #define RPOPSW                    13
 109     { "rpop", RPOPminc (-4) },
 110 #define NRPOPSW                   14
 111     { "norpop", RPOPminc (-6) },
 112 #define SILSW                     15
 113     { "silent", 0 },
 114 #define NSILSW                    16
 115     { "nosilent", 0 },
 116 #define TRNCSW                    17
 117     { "truncate", 0 },
 118 #define NTRNCSW                   18
 119     { "notruncate", 0 },
 120 #define WIDTHSW                   19
 121     { "width columns", 0 },
 122 #define VERSIONSW                 20
 123     { "version", 0 },
 124 #define HELPSW                    21
 125     { "help", 0 },
 126 #define SNOOPSW                   22
 127     { "snoop", -5 },
 128 #define KPOPSW                    23
 129     { "kpop", KPOPminc (-4) },
 130 #define SASLSW                    24
 131     { "sasl", SASLminc(-4) },
 132 #define SASLMECHSW                25
 133     { "saslmech", SASLminc(-8) },
 134     { NULL, 0 }
 135 };
 136
 137 extern int errno;
 138
 139 /*
 140  * flags for the mail source
 141  */
 142 #define INC_FILE  0
 143 #define INC_POP   1
 144
 145 static int inc_type;
 146 static int snoop = 0;
 147
 148 #ifdef POP
 149 extern char response[];
 150
 151 static char *packfile = NULL;
 152 static int size;
 153 static long pos;
 154 static long start;
 155 static long stop;
 156
 157 static int mbx_style = MMDF_FORMAT;
 158 static int pd = NOTOK;
 159 static FILE *pf = NULL;
 160 #endif /* POP */
 161
 162 /* This is an attempt to simplify things by putting all the
 163  * privilege ops into macros.
 164  * *GROUPPRIVS() is related to handling the setgid MAIL property,
 165  * and only applies if MAILGROUP is defined.
 166  * *USERPRIVS() is related to handling the setuid root property,
 167  * and only applies if POP is defined [why does POP => setuid root?]
 168  * Basically, SAVEGROUPPRIVS() is called right at the top of main()
 169  * to initialise things, and then DROPGROUPPRIVS() and GETGROUPPRIVS()
 170  * do the obvious thing. TRYDROPGROUPPRIVS() has to be safe to call
 171  * before DROPUSERPRIVS() is called [this is needed because setgid()
 172  * sets both effective and real uids if euid is root.]
 173  *
 174  * There's probably a better implementation if we're allowed to use
 175  * BSD-style setreuid() rather than using POSIX saved-ids.
 176  * Anyway, if you're euid root it's a bit pointless to drop the group
 177  * permissions...
 178  *
 179  * I'm pretty happy that the security is good provided we aren't setuid root.
 180  * The only things we trust with group=mail privilege are lkfopen()
 181  * and lkfclose().
 182  */
 183
 184 /*
 185  * For setting and returning to "mail" gid
 186  */
 187 #ifdef MAILGROUP
 188 static int return_gid;
 189 #ifndef POP
 190 /* easy case; we're not setuid root, so can drop group privs
 191  * immediately.
 192  */
 193 #define TRYDROPGROUPPRIVS() DROPGROUPPRIVS()
 194 #else /* POP ie we are setuid root */
 195 #define TRYDROPGROUPPRIVS() \
 196 if (geteuid() != 0) DROPGROUPPRIVS()
 197 #endif
 198 #define DROPGROUPPRIVS() setgid(getgid())
 199 #define GETGROUPPRIVS() setgid(return_gid)
 200 #define SAVEGROUPPRIVS() return_gid = getegid()
 201 #else
 202 /* define *GROUPPRIVS() as null; this avoids having lots of "#ifdef MAILGROUP"s */
 203 #define TRYDROPGROUPPRIVS()
 204 #define DROPGROUPPRIVS()
 205 #define GETGROUPPRIVS()
 206 #define SAVEGROUPPRIVS()
 207 #endif /* not MAILGROUP */
 208
 209 #ifdef POP
 210 #define DROPUSERPRIVS() setuid(getuid())
 211 #else
 212 #define DROPUSERPRIVS()
 213 #endif
 214
 215 /* these variables have to be globals so that done() can correctly clean up the lockfile */
 216 static int locked = 0;
 217 static char *newmail;
 218 static FILE *in;
 219
 220 /*
 221  * prototypes
 222  */
 223 char *map_name(char *);
 224
 225 #ifdef POP
 226 int done(int);
 227 static int pop_action(char *);
 228 static int pop_pack(char *);
 229 static int map_count(void);
 230 #endif
 231
 232
 233 int
 234 main (int argc, char **argv)
 235 {
 236     int chgflag = 1, trnflag = 1;
 237     int noisy = 1, width = 0;
 238     int rpop, i, hghnum, msgnum;
 239     int kpop = 0, sasl = 0;
 240     char *cp, *maildir, *folder = NULL;
 241     char *format = NULL, *form = NULL;
 242     char *host = NULL, *user = NULL;
 243     char *audfile = NULL, *from = NULL, *saslmech = NULL;
 244     char buf[BUFSIZ], **argp, *nfs, **arguments;
 245     struct msgs *mp;
 246     struct stat st, s1;
 247     FILE *aud = NULL;
 248
 249 #ifdef POP
 250     int nmsgs, nbytes, p = 0;
 251     char *pass = NULL;
 252     char *MAILHOST_env_variable;
 253 #endif
 254
 255 #ifdef MHE
 256     FILE *mhe = NULL;
 257 #endif
 258
 259 #ifdef HESIOD
 260     struct hes_postoffice *po;
 261 #endif
 262
 263 /* absolutely the first thing we do is save our privileges,
 264  * and drop them if we can.
 265  */
 266     SAVEGROUPPRIVS();
 267     TRYDROPGROUPPRIVS();
 268
 269 #ifdef LOCALE
 270     setlocale(LC_ALL, "");
 271 #endif
 272     invo_name = r1bindex (argv[0], '/');
 273
 274     /* read user profile/context */
 275     context_read();
 276
 277     mts_init (invo_name);
 278     arguments = getarguments (invo_name, argc, argv, 1);
 279     argp = arguments;
 280
 281 #ifdef POP
 282     /*
 283      * Scheme is:
 284      *        use MAILHOST environment variable if present,
 285      *  else try Hesiod.
 286      *  If that fails, use the default (if any)
 287      *  provided by mts.conf in mts_init()
 288      */
 289     if ((MAILHOST_env_variable = getenv("MAILHOST")) != NULL)
 290         pophost = MAILHOST_env_variable;
 291 # ifdef HESIOD
 292     else if ((po = hes_getmailhost(getusername())) != NULL &&
 293              strcmp(po->po_type, "POP") == 0)
 294         pophost = po->po_host;
 295 # endif /* HESIOD */
 296     /*
 297      * If there is a valid "pophost" entry in mts.conf,
 298      * then use it as the default host.
 299      */
 300     if (pophost && *pophost)
 301         host = pophost;
 302
 303     if ((cp = getenv ("MHPOPDEBUG")) && *cp)
 304         snoop++;
 305 #endif /* POP */
 306
 307     rpop = 0;
 308
 309     while ((cp = *argp++)) {
 310         if (*cp == '-') {
 311             switch (smatch (++cp, switches)) {
 312             case AMBIGSW:
 313                 ambigsw (cp, switches);
 314                 done (1);
 315             case UNKWNSW:
 316                 adios (NULL, "-%s unknown", cp);
 317
 318             case HELPSW:
 319                 snprintf (buf, sizeof(buf), "%s [+folder] [switches]", invo_name);
 320                 print_help (buf, switches, 1);
 321                 done (1);
 322             case VERSIONSW:
 323                 print_version(invo_name);
 324                 done (1);
 325
 326             case AUDSW:
 327                 if (!(cp = *argp++) || *cp == '-')
 328                     adios (NULL, "missing argument to %s", argp[-2]);
 329                 audfile = getcpy (m_maildir (cp));
 330                 continue;
 331             case NAUDSW:
 332                 audfile = NULL;
 333                 continue;
 334
 335             case CHGSW:
 336                 chgflag++;
 337                 continue;
 338             case NCHGSW:
 339                 chgflag = 0;
 340                 continue;
 341
 342             /*
 343              * The flag `trnflag' has the value:
 344              *
 345              * 2 if -truncate is given
 346              * 1 by default (truncating is default)
 347              * 0 if -notruncate is given
 348              */
 349             case TRNCSW:
 350                 trnflag = 2;
 351                 continue;
 352             case NTRNCSW:
 353                 trnflag = 0;
 354                 continue;
 355
 356             case FILESW:
 357                 if (!(cp = *argp++) || *cp == '-')
 358                     adios (NULL, "missing argument to %s", argp[-2]);
 359                 from = path (cp, TFILE);
 360
 361                 /*
 362                  * If the truncate file is in default state,
 363                  * change to not truncate.
 364                  */
 365                 if (trnflag == 1)
 366                     trnflag = 0;
 367                 continue;
 368
 369             case SILSW:
 370                 noisy = 0;
 371                 continue;
 372             case NSILSW:
 373                 noisy++;
 374                 continue;
 375
 376             case FORMSW:
 377                 if (!(form = *argp++) || *form == '-')
 378                     adios (NULL, "missing argument to %s", argp[-2]);
 379                 format = NULL;
 380                 continue;
 381             case FMTSW:
 382                 if (!(format = *argp++) || *format == '-')
 383                     adios (NULL, "missing argument to %s", argp[-2]);
 384                 form = NULL;
 385                 continue;
 386
 387             case WIDTHSW:
 388                 if (!(cp = *argp++) || *cp == '-')
 389                     adios (NULL, "missing argument to %s", argp[-2]);
 390                 width = atoi (cp);
 391                 continue;
 392
 393             case HOSTSW:
 394                 if (!(host = *argp++) || *host == '-')
 395                     adios (NULL, "missing argument to %s", argp[-2]);
 396                 continue;
 397             case USERSW:
 398                 if (!(user = *argp++) || *user == '-')
 399                     adios (NULL, "missing argument to %s", argp[-2]);
 400                 continue;
 401
 402             case PACKSW:
 403 #ifndef POP
 404                 if (!(cp = *argp++) || *cp == '-')
 405                     adios (NULL, "missing argument to %s", argp[-2]);
 406 #else /* POP */
 407                 if (!(packfile = *argp++) || *packfile == '-')
 408                     adios (NULL, "missing argument to %s", argp[-2]);
 409 #endif /* POP */
 410                 continue;
 411             case NPACKSW:
 412 #ifdef POP
 413                 packfile = NULL;
 414 #endif /* POP */
 415                 continue;
 416
 417             case APOPSW:
 418                 rpop = -1;
 419                 continue;
 420             case NAPOPSW:
 421                 rpop = 0;
 422                 continue;
 423
 424             case RPOPSW:
 425                 rpop = 1;
 426                 continue;
 427             case NRPOPSW:
 428                 rpop = 0;
 429                 continue;
 430
 431             case KPOPSW:
 432                 kpop = 1;
 433                 continue;
 434
 435             case SNOOPSW:
 436                 snoop++;
 437                 continue;
 438
 439             case SASLSW:
 440                 sasl++;
 441                 continue;
 442
 443             case SASLMECHSW:
 444                 if (!(saslmech = *argp++) || *saslmech == '-')
 445                     adios (NULL, "missing argument to %s", argp[-2]);
 446                 continue;
 447             }
 448         }
 449         if (*cp == '+' || *cp == '@') {
 450             if (folder)
 451                 adios (NULL, "only one folder at a time!");
 452             else
 453                 folder = path (cp + 1, *cp == '+' ? TFOLDER : TSUBCWF);
 454         } else {
 455             adios (NULL, "usage: %s [+folder] [switches]", invo_name);
 456         }
 457     }
 458
 459     /* NOTE: above this point you should use TRYDROPGROUPPRIVS(),
 460      * not DROPGROUPPRIVS().
 461      */
 462 #ifdef POP
 463     if (host && !*host)
 464         host = NULL;
 465     if (from || !host || rpop <= 0)
 466         DROPUSERPRIVS();
 467 #endif /* POP */
 468
 469     /* guarantee dropping group priveleges; we might not have done so earlier */
 470     DROPGROUPPRIVS();
 471
 472     /*
 473      * Where are we getting the new mail?
 474      */
 475     if (from)
 476         inc_type = INC_FILE;
 477 #ifdef POP
 478     else if (host)
 479         inc_type = INC_POP;
 480 #endif
 481     else
 482         inc_type = INC_FILE;
 483
 484 #ifdef POP
 485     /*
 486      * Are we getting the mail from
 487      * a POP server?
 488      */
 489     if (inc_type == INC_POP) {
 490         if (user == NULL)
 491             user = getusername ();
 492         if ( strcmp( POPSERVICE, "kpop" ) == 0 ) {
 493             kpop = 1;
 494         }
 495         if (kpop || sasl || ( rpop > 0))
 496             pass = getusername ();
 497         else
 498             ruserpass (host, &user, &pass);
 499
 500         /*
 501          * initialize POP connection
 502          */
 503         if (pop_init (host, user, pass, snoop, kpop ? 1 : rpop, kpop,
 504                       sasl, saslmech) == NOTOK)
 505             adios (NULL, "%s", response);
 506
 507         /* Check if there are any messages */
 508         if (pop_stat (&nmsgs, &nbytes) == NOTOK)
 509             adios (NULL, "%s", response);
 510
 511         if (rpop > 0)
 512             DROPUSERPRIVS();
 513         if (nmsgs == 0) {
 514             pop_quit();
 515             adios (NULL, "no mail to incorporate");
 516         }
 517     }
 518 #endif /* POP */
 519
 520     /*
 521      * We will get the mail from a file
 522      * (typically the standard maildrop)
 523      */
 524
 525     if (inc_type == INC_FILE) {
 526         if (from)
 527             newmail = from;
 528         else if ((newmail = getenv ("MAILDROP")) && *newmail)
 529             newmail = m_mailpath (newmail);
 530         else if ((newmail = context_find ("maildrop")) && *newmail)
 531             newmail = m_mailpath (newmail);
 532         else {
 533             newmail = concat (MAILDIR, "/", MAILFIL, NULL);
 534         }
 535         if (stat (newmail, &s1) == NOTOK || s1.st_size == 0)
 536             adios (NULL, "no mail to incorporate");
 537     }
 538
 539 #ifdef POP
 540     /* skip the folder setup */
 541     if ((inc_type == INC_POP) && packfile)
 542         goto go_to_it;
 543 #endif /* POP */
 544
 545     if (!context_find ("path"))
 546         free (path ("./", TFOLDER));
 547     if (!folder)
 548         folder = getfolder (0);
 549     maildir = m_maildir (folder);
 550
 551     if (stat (maildir, &st) == NOTOK) {
 552         if (errno != ENOENT)
 553             adios (maildir, "error on folder");
 554         cp = concat ("Create folder \"", maildir, "\"? ", NULL);
 555         if (noisy && !getanswer (cp))
 556             done (1);
 557         free (cp);
 558         if (!makedir (maildir))
 559             adios (NULL, "unable to create folder %s", maildir);
 560     }
 561
 562     if (chdir (maildir) == NOTOK)
 563         adios (maildir, "unable to change directory to");
 564
 565     /* read folder and create message structure */
 566     if (!(mp = folder_read (folder)))
 567         adios (NULL, "unable to read folder %s", folder);
 568
 569 #ifdef POP
 570 go_to_it:
 571 #endif /* POP */
 572
 573     if (inc_type == INC_FILE) {
 574         if (access (newmail, W_OK) != NOTOK) {
 575             locked++;
 576             if (trnflag) {
 577                 SIGNAL (SIGHUP, SIG_IGN);
 578                 SIGNAL (SIGINT, SIG_IGN);
 579                 SIGNAL (SIGQUIT, SIG_IGN);
 580                 SIGNAL (SIGTERM, SIG_IGN);
 581             }
 582
 583             GETGROUPPRIVS();       /* Reset gid to lock mail file */
 584             in = lkfopen (newmail, "r");
 585             DROPGROUPPRIVS();
 586             if (in == NULL)
 587                 adios (NULL, "unable to lock and fopen %s", newmail);
 588             fstat (fileno(in), &s1);
 589         } else {
 590             trnflag = 0;
 591             if ((in = fopen (newmail, "r")) == NULL)
 592                 adios (newmail, "unable to read");
 593         }
 594     }
 595
 596     /* This shouldn't be necessary but it can't hurt. */
 597     DROPGROUPPRIVS();
 598
 599     if (audfile) {
 600         if ((i = stat (audfile, &st)) == NOTOK)
 601             advise (NULL, "Creating Receive-Audit: %s", audfile);
 602         if ((aud = fopen (audfile, "a")) == NULL)
 603             adios (audfile, "unable to append to");
 604         else if (i == NOTOK)
 605             chmod (audfile, m_gmprot ());
 606
 607 #ifdef POP
 608         fprintf (aud, from ? "<<inc>> %s -ms %s\n"
 609                  : host ? "<<inc>> %s -host %s -user %s%s\n"
 610                  : "<<inc>> %s\n",
 611                  dtimenow (0), from ? from : host, user,
 612                  rpop < 0 ? " -apop" : rpop > 0 ? " -rpop" : "");
 613 #else /* POP */
 614         fprintf (aud, from ? "<<inc>> %s  -ms %s\n" : "<<inc>> %s\n",
 615                  dtimenow (0), from);
 616 #endif /* POP */
 617     }
 618
 619 #ifdef MHE
 620     if (context_find ("mhe")) {
 621         cp = concat (maildir, "/++", NULL);
 622         i = stat (cp, &st);
 623         if ((mhe = fopen (cp, "a")) == NULL)
 624             admonish (cp, "unable to append to");
 625         else
 626             if (i == NOTOK)
 627                 chmod (cp, m_gmprot ());
 628         free (cp);
 629     }
 630 #endif /* MHE */
 631
 632     /* Get new format string */
 633     nfs = new_fs (form, format, FORMAT);
 634
 635     if (noisy) {
 636         printf ("Incorporating new mail into %s...\n\n", folder);
 637         fflush (stdout);
 638     }
 639
 640 #ifdef POP
 641     /*
 642      * Get the mail from a POP server
 643      */
 644     if (inc_type == INC_POP) {
 645         if (packfile) {
 646             packfile = path (packfile, TFILE);
 647             if (stat (packfile, &st) == NOTOK) {
 648                 if (errno != ENOENT)
 649                     adios (packfile, "error on file");
 650                 cp = concat ("Create file \"", packfile, "\"? ", NULL);
 651                 if (noisy && !getanswer (cp))
 652                     done (1);
 653                 free (cp);
 654             }
 655             msgnum = map_count ();
 656             if ((pd = mbx_open (packfile, mbx_style, getuid(), getgid(), m_gmprot()))
 657                 == NOTOK)
 658                 adios (packfile, "unable to open");
 659             if ((pf = fdopen (pd, "w+")) == NULL)
 660                 adios (NULL, "unable to fdopen %s", packfile);
 661         } else {
 662             hghnum = msgnum = mp->hghmsg;
 663             /*
 664              * Check if we have enough message space for all the new
 665              * messages.  If not, then realloc the folder and add enough
 666              * space for all new messages plus 10 additional slots.
 667              */
 668             if (mp->hghmsg + nmsgs >= mp->hghoff
 669                 && !(mp = folder_realloc (mp, mp->lowoff, mp->hghmsg + nmsgs + 10)))
 670                 adios (NULL, "unable to allocate folder storage");
 671         }
 672
 673         for (i = 1; i <= nmsgs; i++) {
 674             msgnum++;
 675             if (packfile) {
 676                 fseek (pf, 0L, SEEK_CUR);
 677                 pos = ftell (pf);
 678                 size = 0;
 679                 fwrite (mmdlm1, 1, strlen (mmdlm1), pf);
 680                 start = ftell (pf);
 681
 682                 if (pop_retr (i, pop_pack) == NOTOK)
 683                     adios (NULL, "%s", response);
 684
 685                 fseek (pf, 0L, SEEK_CUR);
 686                 stop = ftell (pf);
 687                 if (fflush (pf))
 688                     adios (packfile, "write error on");
 689                 fseek (pf, start, SEEK_SET);
 690             } else {
 691                 cp = getcpy (m_name (msgnum));
 692                 if ((pf = fopen (cp, "w+")) == NULL)
 693                     adios (cp, "unable to write");
 694                 chmod (cp, m_gmprot ());
 695                 start = stop = 0L;
 696
 697                 if (pop_retr (i, pop_action) == NOTOK)
 698                     adios (NULL, "%s", response);
 699
 700                 if (fflush (pf))
 701                     adios (cp, "write error on");
 702                 fseek (pf, 0L, SEEK_SET);
 703             }
 704             switch (p = scan (pf, msgnum, 0, nfs, width,
 705                               packfile ? 0 : msgnum == mp->hghmsg + 1 && chgflag,
 706                               1, NULL, stop - start, noisy)) {
 707             case SCNEOF:
 708                 printf ("%*d  empty\n", DMAXFOLDER, msgnum);
 709                 break;
 710
 711             case SCNFAT:
 712                 trnflag = 0;
 713                 noisy++;
 714                 /* advise (cp, "unable to read"); already advised */
 715                 /* fall thru */
 716
 717             case SCNERR:
 718             case SCNNUM:
 719                 break;
 720
 721             case SCNMSG:
 722             case SCNENC:
 723             default:
 724                 if (aud)
 725                     fputs (scanl, aud);
 726 # ifdef MHE
 727                 if (mhe)
 728                     fputs (scanl, mhe);
 729 # endif /* MHE */
 730                 if (noisy)
 731                     fflush (stdout);
 732                 if (!packfile) {
 733                     clear_msg_flags (mp, msgnum);
 734                     set_exists (mp, msgnum);
 735                     set_unseen (mp, msgnum);
 736                     mp->msgflags |= SEQMOD;
 737                 }
 738                 break;
 739             }
 740             if (packfile) {
 741                 fseek (pf, stop, SEEK_SET);
 742                 fwrite (mmdlm2, 1, strlen (mmdlm2), pf);
 743                 if (fflush (pf) || ferror (pf)) {
 744                     int e = errno;
 745                     pop_quit ();
 746                     errno = e;
 747                     adios (packfile, "write error on");
 748                 }
 749                 map_write (packfile, pd, 0, 0L, start, stop, pos, size, noisy);
 750             } else {
 751                 if (ferror(pf) || fclose (pf)) {
 752                     int e = errno;
 753                     unlink (cp);
 754                     pop_quit ();
 755                     errno = e;
 756                     adios (cp, "write error on");
 757                 }
 758                 free (cp);
 759             }
 760
 761             if (trnflag && pop_dele (i) == NOTOK)
 762                 adios (NULL, "%s", response);
 763         }
 764
 765         if (pop_quit () == NOTOK)
 766             adios (NULL, "%s", response);
 767         if (packfile) {
 768             mbx_close (packfile, pd);
 769             pd = NOTOK;
 770         }
 771     }
 772 #endif /* POP */
 773
 774     /*
 775      * Get the mail from file (usually mail spool)
 776      */
 777     if (inc_type == INC_FILE) {
 778         m_unknown (in);         /* the MAGIC invocation... */
 779         hghnum = msgnum = mp->hghmsg;
 780         for (i = 0;;) {
 781             /*
 782              * Check if we need to allocate more space for message status.
 783              * If so, then add space for an additional 100 messages.
 784              */
 785             if (msgnum >= mp->hghoff
 786                 && !(mp = folder_realloc (mp, mp->lowoff, mp->hghoff + 100))) {
 787                 advise (NULL, "unable to allocate folder storage");
 788                 i = NOTOK;
 789                 break;
 790             }
 791
 792 #if 0
 793             /* copy file from spool to tmp file */
 794             tmpfilenam = m_scratch ("", invo_name);
 795             if ((fd = creat (tmpfilenam, m_gmprot ())) == NOTOK)
 796                 adios (tmpfilenam, "unable to create");
 797             chmod (tmpfilenam, m_gmprot ());
 798             if (!(in2 = fdopen (fd, "r+")))
 799                 adios (tmpfilenam, "unable to access");
 800             cpymsg (in, in2);
 801
 802             /* link message into folder */
 803             newmsg = folder_addmsg(mp, tmpfilenam);
 804 #endif
 805
 806             /* create scanline for new message */
 807             switch (i = scan (in, msgnum + 1, msgnum + 1, nfs, width,
 808                               msgnum == hghnum && chgflag, 1, NULL, 0L, noisy)) {
 809             case SCNFAT:
 810             case SCNEOF:
 811                 break;
 812
 813             case SCNERR:
 814                 if (aud)
 815                     fputs ("inc aborted!\n", aud);
 816                 advise (NULL, "aborted!");      /* doesn't clean up locks! */
 817                 break;
 818
 819             case SCNNUM:
 820                 advise (NULL, "BUG in %s, number out of range", invo_name);
 821                 break;
 822
 823             default:
 824                 advise (NULL, "BUG in %s, scan() botch (%d)", invo_name, i);
 825                 break;
 826
 827             case SCNMSG:
 828             case SCNENC:
 829                 if (aud)
 830                     fputs (scanl, aud);
 831 #ifdef MHE
 832                 if (mhe)
 833                     fputs (scanl, mhe);
 834 #endif /* MHE */
 835                 if (noisy)
 836                     fflush (stdout);
 837
 838                 msgnum++;
 839                 mp->hghmsg++;
 840                 clear_msg_flags (mp, msgnum);
 841                 set_exists (mp, msgnum);
 842                 set_unseen (mp, msgnum);
 843                 mp->msgflags |= SEQMOD;
 844                 continue;
 845             }
 846             break;
 847         }
 848     }
 849
 850 #ifdef POP
 851     if (p < 0) {                /* error */
 852 #else
 853     if (i < 0) {                /* error */
 854 #endif
 855         if (locked) {
 856             GETGROUPPRIVS();      /* Be sure we can unlock mail file */
 857             (void) lkfclose (in, newmail); in = NULL;
 858             DROPGROUPPRIVS();    /* And then return us to normal privileges */
 859         } else {
 860             fclose (in); in = NULL;
 861         }
 862         adios (NULL, "failed");
 863     }
 864
 865     if (aud)
 866         fclose (aud);
 867
 868 #ifdef MHE
 869     if (mhe)
 870         fclose (mhe);
 871 #endif /* MHE */
 872
 873     if (noisy)
 874         fflush (stdout);
 875
 876 #ifdef POP
 877     if ((inc_type == INC_POP) && packfile)
 878         done (0);
 879 #endif /* POP */
 880
 881     /*
 882      * truncate file we are incorporating from
 883      */
 884     if (inc_type == INC_FILE) {
 885         if (trnflag) {
 886             if (stat (newmail, &st) != NOTOK && s1.st_mtime != st.st_mtime)
 887                 advise (NULL, "new messages have arrived!\007");
 888             else {
 889                 if ((i = creat (newmail, 0600)) != NOTOK)
 890                     close (i);
 891                 else
 892                     admonish (newmail, "error zero'ing");
 893                 unlink(map_name(newmail));
 894             }
 895         } else {
 896             if (noisy)
 897                 printf ("%s not zero'd\n", newmail);
 898         }
 899     }
 900
 901     if (msgnum == hghnum) {
 902         admonish (NULL, "no messages incorporated");
 903     } else {
 904         context_replace (pfolder, folder);      /* update current folder */
 905         if (chgflag)
 906             mp->curmsg = hghnum + 1;
 907         mp->hghmsg = msgnum;
 908         if (mp->lowmsg == 0)
 909             mp->lowmsg = 1;
 910         if (chgflag)            /* sigh... */
 911             seq_setcur (mp, mp->curmsg);
 912     }
 913
 914     /*
 915      * unlock the mail spool
 916      */
 917     if (inc_type == INC_FILE) {
 918         if (locked) {
 919            GETGROUPPRIVS();        /* Be sure we can unlock mail file */
 920            (void) lkfclose (in, newmail); in = NULL;
 921            DROPGROUPPRIVS();       /* And then return us to normal privileges */
 922         } else {
 923             fclose (in); in = NULL;
 924         }
 925     }
 926
 927     seq_setunseen (mp, 0);      /* set the Unseen-Sequence */
 928     seq_save (mp);              /* synchronize sequences   */
 929     context_save ();            /* save the context file   */
 930     return done (0);
 931 }
 932
 933
 934 #if 0
 935
 936 /*
 937  * Copy message message from spool into
 938  * temporary file.  Massage the "From " line
 939  * while copying.
 940  */
 941
 942 cpymsg (FILE *in, FILE *out)
 943 {
 944     int state;
 945     char *tmpbuf, name[NAMESZ];
 946
 947     for (;;) {
 948         state = m_getfld (state, name, tmpbuf, rlwidth, in);
 949         switch (state) {
 950         case FLD:
 951         case FLDPLUS:
 952             break;
 953         case BODY:
 954             break;
 955         case LENERR:
 956         case FMTERR:
 957             break;
 958         case FILEEOF:
 959             break;
 960         default:
 961         }
 962     }
 963 }
 964 #endif /* if 0 */
 965
 966
 967 int
 968 done (int status)
 969 {
 970 #ifdef POP
 971     if (packfile && pd != NOTOK)
 972         mbx_close (packfile, pd);
 973 #endif /* POP */
 974     if (locked)
 975     {
 976         GETGROUPPRIVS();
 977         lkfclose(in, newmail);
 978         DROPGROUPPRIVS();
 979     }
 980     exit (status);
 981     return 1;  /* dead code to satisfy the compiler */
 982 }
 983
 984 #ifdef POP
 985 static int
 986 pop_action (char *s)
 987 {
 988     fprintf (pf, "%s\n", s);
 989     stop += strlen (s) + 1;
 990     return 0;  /* Is return value used?  This was missing before 1999-07-15. */
 991 }
 992
 993 static int
 994 pop_pack (char *s)
 995 {
 996     int j;
 997     char buffer[BUFSIZ];
 998
 999     snprintf (buffer, sizeof(buffer), "%s\n", s);
1000     for (j = 0; (j = stringdex (mmdlm1, buffer)) >= 0; buffer[j]++)
1001         continue;
1002     for (j = 0; (j = stringdex (mmdlm2, buffer)) >= 0; buffer[j]++)
1003         continue;
1004     fputs (buffer, pf);
1005     size += strlen (buffer) + 1;
1006     return 0;  /* Is return value used?  This was missing before 1999-07-15. */
1007 }
1008
1009 static int
1010 map_count (void)
1011 {
1012     int md;
1013     char *cp;
1014     struct drop d;
1015     struct stat st;
1016
1017     if (stat (packfile, &st) == NOTOK)
1018         return 0;
1019     if ((md = open (cp = map_name (packfile), O_RDONLY)) == NOTOK
1020             || map_chk (cp, md, &d, (long) st.st_size, 1)) {
1021         if (md != NOTOK)
1022             close (md);
1023         return 0;
1024     }
1025     close (md);
1026     return (d.d_id);
1027 }
1028 #endif /* POP */