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     char        b[MAXPATHLEN + 1];
 249
 250 #ifdef POP
 251     int nmsgs, nbytes, p = 0;
 252     char *pass = NULL;
 253     char *MAILHOST_env_variable;
 254 #endif
 255
 256 #ifdef MHE
 257     FILE *mhe = NULL;
 258 #endif
 259
 260 #ifdef HESIOD
 261     struct hes_postoffice *po;
 262 #endif
 263
 264 /* absolutely the first thing we do is save our privileges,
 265  * and drop them if we can.
 266  */
 267     SAVEGROUPPRIVS();
 268     TRYDROPGROUPPRIVS();
 269
 270 #ifdef LOCALE
 271     setlocale(LC_ALL, "");
 272 #endif
 273     invo_name = r1bindex (argv[0], '/');
 274
 275     /* read user profile/context */
 276     context_read();
 277
 278     mts_init (invo_name);
 279     arguments = getarguments (invo_name, argc, argv, 1);
 280     argp = arguments;
 281
 282 #ifdef POP
 283     /*
 284      * Scheme is:
 285      *        use MAILHOST environment variable if present,
 286      *  else try Hesiod.
 287      *  If that fails, use the default (if any)
 288      *  provided by mts.conf in mts_init()
 289      */
 290     if ((MAILHOST_env_variable = getenv("MAILHOST")) != NULL)
 291         pophost = MAILHOST_env_variable;
 292 # ifdef HESIOD
 293     else if ((po = hes_getmailhost(getusername())) != NULL &&
 294              strcmp(po->po_type, "POP") == 0)
 295         pophost = po->po_host;
 296 # endif /* HESIOD */
 297     /*
 298      * If there is a valid "pophost" entry in mts.conf,
 299      * then use it as the default host.
 300      */
 301     if (pophost && *pophost)
 302         host = pophost;
 303
 304     if ((cp = getenv ("MHPOPDEBUG")) && *cp)
 305         snoop++;
 306 #endif /* POP */
 307
 308     rpop = 0;
 309
 310     while ((cp = *argp++)) {
 311         if (*cp == '-') {
 312             switch (smatch (++cp, switches)) {
 313             case AMBIGSW:
 314                 ambigsw (cp, switches);
 315                 done (1);
 316             case UNKWNSW:
 317                 adios (NULL, "-%s unknown", cp);
 318
 319             case HELPSW:
 320                 snprintf (buf, sizeof(buf), "%s [+folder] [switches]", invo_name);
 321                 print_help (buf, switches, 1);
 322                 done (1);
 323             case VERSIONSW:
 324                 print_version(invo_name);
 325                 done (1);
 326
 327             case AUDSW:
 328                 if (!(cp = *argp++) || *cp == '-')
 329                     adios (NULL, "missing argument to %s", argp[-2]);
 330                 audfile = getcpy (m_maildir (cp));
 331                 continue;
 332             case NAUDSW:
 333                 audfile = NULL;
 334                 continue;
 335
 336             case CHGSW:
 337                 chgflag++;
 338                 continue;
 339             case NCHGSW:
 340                 chgflag = 0;
 341                 continue;
 342
 343             /*
 344              * The flag `trnflag' has the value:
 345              *
 346              * 2 if -truncate is given
 347              * 1 by default (truncating is default)
 348              * 0 if -notruncate is given
 349              */
 350             case TRNCSW:
 351                 trnflag = 2;
 352                 continue;
 353             case NTRNCSW:
 354                 trnflag = 0;
 355                 continue;
 356
 357             case FILESW:
 358                 if (!(cp = *argp++) || *cp == '-')
 359                     adios (NULL, "missing argument to %s", argp[-2]);
 360                 from = path (cp, TFILE);
 361
 362                 /*
 363                  * If the truncate file is in default state,
 364                  * change to not truncate.
 365                  */
 366                 if (trnflag == 1)
 367                     trnflag = 0;
 368                 continue;
 369
 370             case SILSW:
 371                 noisy = 0;
 372                 continue;
 373             case NSILSW:
 374                 noisy++;
 375                 continue;
 376
 377             case FORMSW:
 378                 if (!(form = *argp++) || *form == '-')
 379                     adios (NULL, "missing argument to %s", argp[-2]);
 380                 format = NULL;
 381                 continue;
 382             case FMTSW:
 383                 if (!(format = *argp++) || *format == '-')
 384                     adios (NULL, "missing argument to %s", argp[-2]);
 385                 form = NULL;
 386                 continue;
 387
 388             case WIDTHSW:
 389                 if (!(cp = *argp++) || *cp == '-')
 390                     adios (NULL, "missing argument to %s", argp[-2]);
 391                 width = atoi (cp);
 392                 continue;
 393
 394             case HOSTSW:
 395                 if (!(host = *argp++) || *host == '-')
 396                     adios (NULL, "missing argument to %s", argp[-2]);
 397                 continue;
 398             case USERSW:
 399                 if (!(user = *argp++) || *user == '-')
 400                     adios (NULL, "missing argument to %s", argp[-2]);
 401                 continue;
 402
 403             case PACKSW:
 404 #ifndef POP
 405                 if (!(cp = *argp++) || *cp == '-')
 406                     adios (NULL, "missing argument to %s", argp[-2]);
 407 #else /* POP */
 408                 if (!(packfile = *argp++) || *packfile == '-')
 409                     adios (NULL, "missing argument to %s", argp[-2]);
 410 #endif /* POP */
 411                 continue;
 412             case NPACKSW:
 413 #ifdef POP
 414                 packfile = NULL;
 415 #endif /* POP */
 416                 continue;
 417
 418             case APOPSW:
 419                 rpop = -1;
 420                 continue;
 421             case NAPOPSW:
 422                 rpop = 0;
 423                 continue;
 424
 425             case RPOPSW:
 426                 rpop = 1;
 427                 continue;
 428             case NRPOPSW:
 429                 rpop = 0;
 430                 continue;
 431
 432             case KPOPSW:
 433                 kpop = 1;
 434                 continue;
 435
 436             case SNOOPSW:
 437                 snoop++;
 438                 continue;
 439
 440             case SASLSW:
 441                 sasl++;
 442                 continue;
 443
 444             case SASLMECHSW:
 445                 if (!(saslmech = *argp++) || *saslmech == '-')
 446                     adios (NULL, "missing argument to %s", argp[-2]);
 447                 continue;
 448             }
 449         }
 450         if (*cp == '+' || *cp == '@') {
 451             if (folder)
 452                 adios (NULL, "only one folder at a time!");
 453             else
 454                 folder = path (cp + 1, *cp == '+' ? TFOLDER : TSUBCWF);
 455         } else {
 456             adios (NULL, "usage: %s [+folder] [switches]", invo_name);
 457         }
 458     }
 459
 460     /* NOTE: above this point you should use TRYDROPGROUPPRIVS(),
 461      * not DROPGROUPPRIVS().
 462      */
 463 #ifdef POP
 464     if (host && !*host)
 465         host = NULL;
 466     if (from || !host || rpop <= 0)
 467         DROPUSERPRIVS();
 468 #endif /* POP */
 469
 470     /* guarantee dropping group priveleges; we might not have done so earlier */
 471     DROPGROUPPRIVS();
 472
 473     /*
 474      * Where are we getting the new mail?
 475      */
 476     if (from)
 477         inc_type = INC_FILE;
 478 #ifdef POP
 479     else if (host)
 480         inc_type = INC_POP;
 481 #endif
 482     else
 483         inc_type = INC_FILE;
 484
 485 #ifdef POP
 486     /*
 487      * Are we getting the mail from
 488      * a POP server?
 489      */
 490     if (inc_type == INC_POP) {
 491         if (user == NULL)
 492             user = getusername ();
 493         if ( strcmp( POPSERVICE, "kpop" ) == 0 ) {
 494             kpop = 1;
 495         }
 496         if (kpop || sasl || ( rpop > 0))
 497             pass = getusername ();
 498         else
 499             ruserpass (host, &user, &pass);
 500
 501         /*
 502          * initialize POP connection
 503          */
 504         if (pop_init (host, user, pass, snoop, kpop ? 1 : rpop, kpop,
 505                       sasl, saslmech) == NOTOK)
 506             adios (NULL, "%s", response);
 507
 508         /* Check if there are any messages */
 509         if (pop_stat (&nmsgs, &nbytes) == NOTOK)
 510             adios (NULL, "%s", response);
 511
 512         if (rpop > 0)
 513             DROPUSERPRIVS();
 514         if (nmsgs == 0) {
 515             pop_quit();
 516             adios (NULL, "no mail to incorporate");
 517         }
 518     }
 519 #endif /* POP */
 520
 521     /*
 522      * We will get the mail from a file
 523      * (typically the standard maildrop)
 524      */
 525
 526     if (inc_type == INC_FILE) {
 527         if (from)
 528             newmail = from;
 529         else if ((newmail = getenv ("MAILDROP")) && *newmail)
 530             newmail = m_mailpath (newmail);
 531         else if ((newmail = context_find ("maildrop")) && *newmail)
 532             newmail = m_mailpath (newmail);
 533         else {
 534             newmail = concat (MAILDIR, "/", MAILFIL, NULL);
 535         }
 536         if (stat (newmail, &s1) == NOTOK || s1.st_size == 0)
 537             adios (NULL, "no mail to incorporate");
 538     }
 539
 540 #ifdef POP
 541     /* skip the folder setup */
 542     if ((inc_type == INC_POP) && packfile)
 543         goto go_to_it;
 544 #endif /* POP */
 545
 546     if (!context_find ("path"))
 547         free (path ("./", TFOLDER));
 548     if (!folder)
 549         folder = getfolder (0);
 550     maildir = m_maildir (folder);
 551
 552     if (stat (maildir, &st) == NOTOK) {
 553         if (errno != ENOENT)
 554             adios (maildir, "error on folder");
 555         cp = concat ("Create folder \"", maildir, "\"? ", NULL);
 556         if (noisy && !getanswer (cp))
 557             done (1);
 558         free (cp);
 559         if (!makedir (maildir))
 560             adios (NULL, "unable to create folder %s", maildir);
 561     }
 562
 563     if (chdir (maildir) == NOTOK)
 564         adios (maildir, "unable to change directory to");
 565
 566     /* read folder and create message structure */
 567     if (!(mp = folder_read (folder)))
 568         adios (NULL, "unable to read folder %s", folder);
 569
 570 #ifdef POP
 571 go_to_it:
 572 #endif /* POP */
 573
 574     if (inc_type == INC_FILE) {
 575         if (access (newmail, W_OK) != NOTOK) {
 576             locked++;
 577             if (trnflag) {
 578                 SIGNAL (SIGHUP, SIG_IGN);
 579                 SIGNAL (SIGINT, SIG_IGN);
 580                 SIGNAL (SIGQUIT, SIG_IGN);
 581                 SIGNAL (SIGTERM, SIG_IGN);
 582             }
 583
 584             GETGROUPPRIVS();       /* Reset gid to lock mail file */
 585             in = lkfopen (newmail, "r");
 586             DROPGROUPPRIVS();
 587             if (in == NULL)
 588                 adios (NULL, "unable to lock and fopen %s", newmail);
 589             fstat (fileno(in), &s1);
 590         } else {
 591             trnflag = 0;
 592             if ((in = fopen (newmail, "r")) == NULL)
 593                 adios (newmail, "unable to read");
 594         }
 595     }
 596
 597     /* This shouldn't be necessary but it can't hurt. */
 598     DROPGROUPPRIVS();
 599
 600     if (audfile) {
 601         if ((i = stat (audfile, &st)) == NOTOK)
 602             advise (NULL, "Creating Receive-Audit: %s", audfile);
 603         if ((aud = fopen (audfile, "a")) == NULL)
 604             adios (audfile, "unable to append to");
 605         else if (i == NOTOK)
 606             chmod (audfile, m_gmprot ());
 607
 608 #ifdef POP
 609         fprintf (aud, from ? "<<inc>> %s -ms %s\n"
 610                  : host ? "<<inc>> %s -host %s -user %s%s\n"
 611                  : "<<inc>> %s\n",
 612                  dtimenow (0), from ? from : host, user,
 613                  rpop < 0 ? " -apop" : rpop > 0 ? " -rpop" : "");
 614 #else /* POP */
 615         fprintf (aud, from ? "<<inc>> %s  -ms %s\n" : "<<inc>> %s\n",
 616                  dtimenow (0), from);
 617 #endif /* POP */
 618     }
 619
 620 #ifdef MHE
 621     if (context_find ("mhe")) {
 622         cp = concat (maildir, "/++", NULL);
 623         i = stat (cp, &st);
 624         if ((mhe = fopen (cp, "a")) == NULL)
 625             admonish (cp, "unable to append to");
 626         else
 627             if (i == NOTOK)
 628                 chmod (cp, m_gmprot ());
 629         free (cp);
 630     }
 631 #endif /* MHE */
 632
 633     /* Get new format string */
 634     nfs = new_fs (form, format, FORMAT);
 635
 636     if (noisy) {
 637         printf ("Incorporating new mail into %s...\n\n", folder);
 638         fflush (stdout);
 639     }
 640
 641 #ifdef POP
 642     /*
 643      * Get the mail from a POP server
 644      */
 645     if (inc_type == INC_POP) {
 646         if (packfile) {
 647             packfile = path (packfile, TFILE);
 648             if (stat (packfile, &st) == NOTOK) {
 649                 if (errno != ENOENT)
 650                     adios (packfile, "error on file");
 651                 cp = concat ("Create file \"", packfile, "\"? ", NULL);
 652                 if (noisy && !getanswer (cp))
 653                     done (1);
 654                 free (cp);
 655             }
 656             msgnum = map_count ();
 657             if ((pd = mbx_open (packfile, mbx_style, getuid(), getgid(), m_gmprot()))
 658                 == NOTOK)
 659                 adios (packfile, "unable to open");
 660             if ((pf = fdopen (pd, "w+")) == NULL)
 661                 adios (NULL, "unable to fdopen %s", packfile);
 662         } else {
 663             hghnum = msgnum = mp->hghmsg;
 664             /*
 665              * Check if we have enough message space for all the new
 666              * messages.  If not, then realloc the folder and add enough
 667              * space for all new messages plus 10 additional slots.
 668              */
 669             if (mp->hghmsg + nmsgs >= mp->hghoff
 670                 && !(mp = folder_realloc (mp, mp->lowoff, mp->hghmsg + nmsgs + 10)))
 671                 adios (NULL, "unable to allocate folder storage");
 672         }
 673
 674         for (i = 1; i <= nmsgs; i++) {
 675             msgnum++;
 676             if (packfile) {
 677                 fseek (pf, 0L, SEEK_CUR);
 678                 pos = ftell (pf);
 679                 size = 0;
 680                 fwrite (mmdlm1, 1, strlen (mmdlm1), pf);
 681                 start = ftell (pf);
 682
 683                 if (pop_retr (i, pop_pack) == NOTOK)
 684                     adios (NULL, "%s", response);
 685
 686                 fseek (pf, 0L, SEEK_CUR);
 687                 stop = ftell (pf);
 688                 if (fflush (pf))
 689                     adios (packfile, "write error on");
 690                 fseek (pf, start, SEEK_SET);
 691             } else {
 692                 cp = getcpy (m_name (msgnum));
 693                 if ((pf = fopen (cp, "w+")) == NULL)
 694                     adios (cp, "unable to write");
 695                 chmod (cp, m_gmprot ());
 696                 start = stop = 0L;
 697
 698                 if (pop_retr (i, pop_action) == NOTOK)
 699                     adios (NULL, "%s", response);
 700
 701                 if (fflush (pf))
 702                     adios (cp, "write error on");
 703                 fseek (pf, 0L, SEEK_SET);
 704             }
 705             switch (p = scan (pf, msgnum, 0, nfs, width,
 706                               packfile ? 0 : msgnum == mp->hghmsg + 1 && chgflag,
 707                               1, NULL, stop - start, noisy)) {
 708             case SCNEOF:
 709                 printf ("%*d  empty\n", DMAXFOLDER, msgnum);
 710                 break;
 711
 712             case SCNFAT:
 713                 trnflag = 0;
 714                 noisy++;
 715                 /* advise (cp, "unable to read"); already advised */
 716                 /* fall thru */
 717
 718             case SCNERR:
 719             case SCNNUM:
 720                 break;
 721
 722             case SCNMSG:
 723             case SCNENC:
 724             default:
 725                 if (aud)
 726                     fputs (scanl, aud);
 727 # ifdef MHE
 728                 if (mhe)
 729                     fputs (scanl, mhe);
 730 # endif /* MHE */
 731                 if (noisy)
 732                     fflush (stdout);
 733                 if (!packfile) {
 734                     clear_msg_flags (mp, msgnum);
 735                     set_exists (mp, msgnum);
 736                     set_unseen (mp, msgnum);
 737                     mp->msgflags |= SEQMOD;
 738                 }
 739                 break;
 740             }
 741             if (packfile) {
 742                 fseek (pf, stop, SEEK_SET);
 743                 fwrite (mmdlm2, 1, strlen (mmdlm2), pf);
 744                 if (fflush (pf) || ferror (pf)) {
 745                     int e = errno;
 746                     pop_quit ();
 747                     errno = e;
 748                     adios (packfile, "write error on");
 749                 }
 750                 map_write (packfile, pd, 0, 0L, start, stop, pos, size, noisy);
 751             } else {
 752                 if (ferror(pf) || fclose (pf)) {
 753                     int e = errno;
 754                     unlink (cp);
 755                     pop_quit ();
 756                     errno = e;
 757                     adios (cp, "write error on");
 758                 }
 759                 free (cp);
 760             }
 761
 762             if (trnflag && pop_dele (i) == NOTOK)
 763                 adios (NULL, "%s", response);
 764         }
 765
 766         if (pop_quit () == NOTOK)
 767             adios (NULL, "%s", response);
 768         if (packfile) {
 769             mbx_close (packfile, pd);
 770             pd = NOTOK;
 771         }
 772     }
 773 #endif /* POP */
 774
 775     /*
 776      * Get the mail from file (usually mail spool)
 777      */
 778     if (inc_type == INC_FILE) {
 779         m_unknown (in);         /* the MAGIC invocation... */
 780         hghnum = msgnum = mp->hghmsg;
 781         for (i = 0;;) {
 782             /*
 783              * Check if we need to allocate more space for message status.
 784              * If so, then add space for an additional 100 messages.
 785              */
 786             if (msgnum >= mp->hghoff
 787                 && !(mp = folder_realloc (mp, mp->lowoff, mp->hghoff + 100))) {
 788                 advise (NULL, "unable to allocate folder storage");
 789                 i = NOTOK;
 790                 break;
 791             }
 792
 793 #if 0
 794             /* copy file from spool to tmp file */
 795             tmpfilenam = m_scratch ("", invo_name);
 796             if ((fd = creat (tmpfilenam, m_gmprot ())) == NOTOK)
 797                 adios (tmpfilenam, "unable to create");
 798             chmod (tmpfilenam, m_gmprot ());
 799             if (!(in2 = fdopen (fd, "r+")))
 800                 adios (tmpfilenam, "unable to access");
 801             cpymsg (in, in2);
 802
 803             /* link message into folder */
 804             newmsg = folder_addmsg(mp, tmpfilenam);
 805 #endif
 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                 /*
 830                  *  Run the external program hook on the message.
 831                  */
 832
 833                 (void)snprintf(b, sizeof (b), "%s/%d", maildir, msgnum + 1);
 834                 (void)ext_hook("add-hook", b, (char *)0);
 835
 836                 if (aud)
 837                     fputs (scanl, aud);
 838 #ifdef MHE
 839                 if (mhe)
 840                     fputs (scanl, mhe);
 841 #endif /* MHE */
 842                 if (noisy)
 843                     fflush (stdout);
 844
 845                 msgnum++;
 846                 mp->hghmsg++;
 847                 clear_msg_flags (mp, msgnum);
 848                 set_exists (mp, msgnum);
 849                 set_unseen (mp, msgnum);
 850                 mp->msgflags |= SEQMOD;
 851                 continue;
 852             }
 853             break;
 854         }
 855     }
 856
 857 #ifdef POP
 858     if (p < 0) {                /* error */
 859 #else
 860     if (i < 0) {                /* error */
 861 #endif
 862         if (locked) {
 863             GETGROUPPRIVS();      /* Be sure we can unlock mail file */
 864             (void) lkfclose (in, newmail); in = NULL;
 865             DROPGROUPPRIVS();    /* And then return us to normal privileges */
 866         } else {
 867             fclose (in); in = NULL;
 868         }
 869         adios (NULL, "failed");
 870     }
 871
 872     if (aud)
 873         fclose (aud);
 874
 875 #ifdef MHE
 876     if (mhe)
 877         fclose (mhe);
 878 #endif /* MHE */
 879
 880     if (noisy)
 881         fflush (stdout);
 882
 883 #ifdef POP
 884     if ((inc_type == INC_POP) && packfile)
 885         done (0);
 886 #endif /* POP */
 887
 888     /*
 889      * truncate file we are incorporating from
 890      */
 891     if (inc_type == INC_FILE) {
 892         if (trnflag) {
 893             if (stat (newmail, &st) != NOTOK && s1.st_mtime != st.st_mtime)
 894                 advise (NULL, "new messages have arrived!\007");
 895             else {
 896                 if ((i = creat (newmail, 0600)) != NOTOK)
 897                     close (i);
 898                 else
 899                     admonish (newmail, "error zero'ing");
 900                 unlink(map_name(newmail));
 901             }
 902         } else {
 903             if (noisy)
 904                 printf ("%s not zero'd\n", newmail);
 905         }
 906     }
 907
 908     if (msgnum == hghnum) {
 909         admonish (NULL, "no messages incorporated");
 910     } else {
 911         context_replace (pfolder, folder);      /* update current folder */
 912         if (chgflag)
 913             mp->curmsg = hghnum + 1;
 914         mp->hghmsg = msgnum;
 915         if (mp->lowmsg == 0)
 916             mp->lowmsg = 1;
 917         if (chgflag)            /* sigh... */
 918             seq_setcur (mp, mp->curmsg);
 919     }
 920
 921     /*
 922      * unlock the mail spool
 923      */
 924     if (inc_type == INC_FILE) {
 925         if (locked) {
 926            GETGROUPPRIVS();        /* Be sure we can unlock mail file */
 927            (void) lkfclose (in, newmail); in = NULL;
 928            DROPGROUPPRIVS();       /* And then return us to normal privileges */
 929         } else {
 930             fclose (in); in = NULL;
 931         }
 932     }
 933
 934     seq_setunseen (mp, 0);      /* set the Unseen-Sequence */
 935     seq_save (mp);              /* synchronize sequences   */
 936     context_save ();            /* save the context file   */
 937     return done (0);
 938 }
 939
 940
 941 #if 0
 942
 943 /*
 944  * Copy message message from spool into
 945  * temporary file.  Massage the "From " line
 946  * while copying.
 947  */
 948
 949 cpymsg (FILE *in, FILE *out)
 950 {
 951     int state;
 952     char *tmpbuf, name[NAMESZ];
 953
 954     for (;;) {
 955         state = m_getfld (state, name, tmpbuf, rlwidth, in);
 956         switch (state) {
 957         case FLD:
 958         case FLDPLUS:
 959             break;
 960         case BODY:
 961             break;
 962         case LENERR:
 963         case FMTERR:
 964             break;
 965         case FILEEOF:
 966             break;
 967         default:
 968         }
 969     }
 970 }
 971 #endif /* if 0 */
 972
 973
 974 int
 975 done (int status)
 976 {
 977 #ifdef POP
 978     if (packfile && pd != NOTOK)
 979         mbx_close (packfile, pd);
 980 #endif /* POP */
 981     if (locked)
 982     {
 983         GETGROUPPRIVS();
 984         lkfclose(in, newmail);
 985         DROPGROUPPRIVS();
 986     }
 987     exit (status);
 988     return 1;  /* dead code to satisfy the compiler */
 989 }
 990
 991 #ifdef POP
 992 static int
 993 pop_action (char *s)
 994 {
 995     fprintf (pf, "%s\n", s);
 996     stop += strlen (s) + 1;
 997     return 0;  /* Is return value used?  This was missing before 1999-07-15. */
 998 }
 999
1000 static int
1001 pop_pack (char *s)
1002 {
1003     int j;
1004     char buffer[BUFSIZ];
1005
1006     snprintf (buffer, sizeof(buffer), "%s\n", s);
1007     for (j = 0; (j = stringdex (mmdlm1, buffer)) >= 0; buffer[j]++)
1008         continue;
1009     for (j = 0; (j = stringdex (mmdlm2, buffer)) >= 0; buffer[j]++)
1010         continue;
1011     fputs (buffer, pf);
1012     size += strlen (buffer) + 1;
1013     return 0;  /* Is return value used?  This was missing before 1999-07-15. */
1014 }
1015
1016 static int
1017 map_count (void)
1018 {
1019     int md;
1020     char *cp;
1021     struct drop d;
1022     struct stat st;
1023
1024     if (stat (packfile, &st) == NOTOK)
1025         return 0;
1026     if ((md = open (cp = map_name (packfile), O_RDONLY)) == NOTOK
1027             || map_chk (cp, md, &d, (long) st.st_size, 1)) {
1028         if (md != NOTOK)
1029             close (md);
1030         return 0;
1031     }
1032     close (md);
1033     return (d.d_id);
1034 }
1035 #endif /* POP */