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

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