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 <h/utils.h>
  33 #include <fcntl.h>
  34
  35 #ifdef POP
  36 # include <h/dropsbr.h>
  37 # include <h/popsbr.h>
  38 #endif
  39
  40 #ifdef HESIOD
  41 # include <hesiod.h>
  42 #endif
  43
  44 #include <h/fmt_scan.h>
  45 #include <h/scansbr.h>
  46 #include <h/signals.h>
  47 #include <h/tws.h>
  48 #include <h/mts.h>
  49 #include <errno.h>
  50 #include <signal.h>
  51
  52 #ifndef POP
  53 # define POPminc(a) (a)
  54 #else
  55 # define POPminc(a)  0
  56 #endif
  57
  58 #ifndef RPOP
  59 # define RPOPminc(a) (a)
  60 #else
  61 # define RPOPminc(a)  0
  62 #endif
  63
  64 #ifndef APOP
  65 # define APOPminc(a) (a)
  66 #else
  67 # define APOPminc(a)  0
  68 #endif
  69
  70 #ifndef KPOP
  71 # define KPOPminc(a) (a)
  72 #else
  73 # define KPOPminc(a)  0
  74 #endif
  75
  76 #ifndef CYRUS_SASL
  77 # define SASLminc(a) (a)
  78 #else
  79 # define SASLminc(a)  0
  80 #endif
  81
  82 static struct swit switches[] = {
  83 #define AUDSW                      0
  84     { "audit audit-file", 0 },
  85 #define NAUDSW                     1
  86     { "noaudit", 0 },
  87 #define CHGSW                      2
  88     { "changecur", 0 },
  89 #define NCHGSW                     3
  90     { "nochangecur", 0 },
  91 #define FILESW                     4
  92     { "file name", 0 },
  93 #define FORMSW                     5
  94     { "form formatfile", 0 },
  95 #define FMTSW                      6
  96     { "format string", 5 },
  97 #define HOSTSW                     7
  98     { "host hostname", POPminc (-4) },
  99 #define USERSW                     8
 100     { "user username", POPminc (-4) },
 101 #define PACKSW                     9
 102     { "pack file", POPminc (-4) },
 103 #define NPACKSW                   10
 104     { "nopack", POPminc (-6) },
 105 #define APOPSW                    11
 106     { "apop", APOPminc (-4) },
 107 #define NAPOPSW                   12
 108     { "noapop", APOPminc (-6) },
 109 #define RPOPSW                    13
 110     { "rpop", RPOPminc (-4) },
 111 #define NRPOPSW                   14
 112     { "norpop", RPOPminc (-6) },
 113 #define SILSW                     15
 114     { "silent", 0 },
 115 #define NSILSW                    16
 116     { "nosilent", 0 },
 117 #define TRNCSW                    17
 118     { "truncate", 0 },
 119 #define NTRNCSW                   18
 120     { "notruncate", 0 },
 121 #define WIDTHSW                   19
 122     { "width columns", 0 },
 123 #define VERSIONSW                 20
 124     { "version", 0 },
 125 #define HELPSW                    21
 126     { "help", 0 },
 127 #define SNOOPSW                   22
 128     { "snoop", -5 },
 129 #define KPOPSW                    23
 130     { "kpop", KPOPminc (-4) },
 131 #define SASLSW                    24
 132     { "sasl", SASLminc(-4) },
 133 #define SASLMECHSW                25
 134     { "saslmech", SASLminc(-8) },
 135 #define PROXYSW                   26
 136     { "proxy command", POPminc(-5) },
 137     { NULL, 0 }
 138 };
 139
 140 /*
 141  * flags for the mail source
 142  */
 143 #define INC_FILE  0
 144 #define INC_POP   1
 145
 146 static int inc_type;
 147 static int snoop = 0;
 148
 149 #ifdef POP
 150 extern char response[];
 151
 152 static char *packfile = NULL;
 153 static int size;
 154 static long pos;
 155 static long start;
 156 static long stop;
 157
 158 static int mbx_style = MMDF_FORMAT;
 159 static int pd = NOTOK;
 160 static FILE *pf = NULL;
 161 #endif /* POP */
 162
 163 /* This is an attempt to simplify things by putting all the
 164  * privilege ops into macros.
 165  * *GROUPPRIVS() is related to handling the setgid MAIL property,
 166  * and only applies if MAILGROUP is defined.
 167  * *USERPRIVS() is related to handling the setuid root property,
 168  * and only applies if POP is defined [why does POP => setuid root?]
 169  * Basically, SAVEGROUPPRIVS() is called right at the top of main()
 170  * to initialise things, and then DROPGROUPPRIVS() and GETGROUPPRIVS()
 171  * do the obvious thing. TRYDROPGROUPPRIVS() has to be safe to call
 172  * before DROPUSERPRIVS() is called [this is needed because setgid()
 173  * sets both effective and real uids if euid is root.]
 174  *
 175  * There's probably a better implementation if we're allowed to use
 176  * BSD-style setreuid() rather than using POSIX saved-ids.
 177  * Anyway, if you're euid root it's a bit pointless to drop the group
 178  * permissions...
 179  *
 180  * I'm pretty happy that the security is good provided we aren't setuid root.
 181  * The only things we trust with group=mail privilege are lkfopen()
 182  * and lkfclose().
 183  */
 184
 185 /*
 186  * For setting and returning to "mail" gid
 187  */
 188 #ifdef MAILGROUP
 189 static int return_gid;
 190 #ifndef POP
 191 /* easy case; we're not setuid root, so can drop group privs
 192  * immediately.
 193  */
 194 #define TRYDROPGROUPPRIVS() DROPGROUPPRIVS()
 195 #else /* POP ie we are setuid root */
 196 #define TRYDROPGROUPPRIVS() \
 197 if (geteuid() != 0) DROPGROUPPRIVS()
 198 #endif
 199 #define DROPGROUPPRIVS() setgid(getgid())
 200 #define GETGROUPPRIVS() setgid(return_gid)
 201 #define SAVEGROUPPRIVS() return_gid = getegid()
 202 #else
 203 /* define *GROUPPRIVS() as null; this avoids having lots of "#ifdef MAILGROUP"s */
 204 #define TRYDROPGROUPPRIVS()
 205 #define DROPGROUPPRIVS()
 206 #define GETGROUPPRIVS()
 207 #define SAVEGROUPPRIVS()
 208 #endif /* not MAILGROUP */
 209
 210 #ifdef POP
 211 #define DROPUSERPRIVS() setuid(getuid())
 212 #else
 213 #define DROPUSERPRIVS()
 214 #endif
 215
 216 /* these variables have to be globals so that done() can correctly clean up the lockfile */
 217 static int locked = 0;
 218 static char *newmail;
 219 static FILE *in;
 220
 221 /*
 222  * prototypes
 223  */
 224 char *map_name(char *);
 225
 226 #ifdef POP
 227 int done(int);
 228 static int pop_action(char *);
 229 static int pop_pack(char *);
 230 static int map_count(void);
 231 #endif
 232
 233
 234 int
 235 main (int argc, char **argv)
 236 {
 237     int chgflag = 1, trnflag = 1;
 238     int noisy = 1, width = 0;
 239     int rpop, i, hghnum, msgnum;
 240     int kpop = 0, sasl = 0;
 241     char *cp, *maildir, *folder = NULL;
 242     char *format = NULL, *form = NULL;
 243     char *host = NULL, *user = NULL, *proxy = NULL;
 244     char *audfile = NULL, *from = NULL, *saslmech = NULL;
 245     char buf[BUFSIZ], **argp, *nfs, **arguments;
 246     struct msgs *mp;
 247     struct stat st, s1;
 248     FILE *aud = NULL;
 249     char        b[MAXPATHLEN + 1];
 250     char        *maildir_copy;          /* copy of mail directory because the static gets overwritten */
 251
 252 #ifdef POP
 253     int nmsgs, nbytes, p = 0;
 254     char *pass = NULL;
 255     char *MAILHOST_env_variable;
 256 #endif
 257
 258 #ifdef MHE
 259     FILE *mhe = NULL;
 260 #endif
 261
 262 #ifdef HESIOD
 263     struct hes_postoffice *po;
 264 #endif
 265
 266 /* absolutely the first thing we do is save our privileges,
 267  * and drop them if we can.
 268  */
 269     SAVEGROUPPRIVS();
 270     TRYDROPGROUPPRIVS();
 271
 272 #ifdef LOCALE
 273     setlocale(LC_ALL, "");
 274 #endif
 275     invo_name = r1bindex (argv[0], '/');
 276
 277     /* read user profile/context */
 278     context_read();
 279
 280     mts_init (invo_name);
 281     arguments = getarguments (invo_name, argc, argv, 1);
 282     argp = arguments;
 283
 284 #ifdef POP
 285     /*
 286      * Scheme is:
 287      *        use MAILHOST environment variable if present,
 288      *  else try Hesiod.
 289      *  If that fails, use the default (if any)
 290      *  provided by mts.conf in mts_init()
 291      */
 292     if ((MAILHOST_env_variable = getenv("MAILHOST")) != NULL)
 293         pophost = MAILHOST_env_variable;
 294 # ifdef HESIOD
 295     else if ((po = hes_getmailhost(getusername())) != NULL &&
 296              strcmp(po->po_type, "POP") == 0)
 297         pophost = po->po_host;
 298 # endif /* HESIOD */
 299     /*
 300      * If there is a valid "pophost" entry in mts.conf,
 301      * then use it as the default host.
 302      */
 303     if (pophost && *pophost)
 304         host = pophost;
 305
 306     if ((cp = getenv ("MHPOPDEBUG")) && *cp)
 307         snoop++;
 308 #endif /* POP */
 309
 310     rpop = 0;
 311
 312     while ((cp = *argp++)) {
 313         if (*cp == '-') {
 314             switch (smatch (++cp, switches)) {
 315             case AMBIGSW:
 316                 ambigsw (cp, switches);
 317                 done (1);
 318             case UNKWNSW:
 319                 adios (NULL, "-%s unknown", cp);
 320
 321             case HELPSW:
 322                 snprintf (buf, sizeof(buf), "%s [+folder] [switches]", invo_name);
 323                 print_help (buf, switches, 1);
 324                 done (1);
 325             case VERSIONSW:
 326                 print_version(invo_name);
 327                 done (1);
 328
 329             case AUDSW:
 330                 if (!(cp = *argp++) || *cp == '-')
 331                     adios (NULL, "missing argument to %s", argp[-2]);
 332                 audfile = getcpy (m_maildir (cp));
 333                 continue;
 334             case NAUDSW:
 335                 audfile = NULL;
 336                 continue;
 337
 338             case CHGSW:
 339                 chgflag++;
 340                 continue;
 341             case NCHGSW:
 342                 chgflag = 0;
 343                 continue;
 344
 345             /*
 346              * The flag `trnflag' has the value:
 347              *
 348              * 2 if -truncate is given
 349              * 1 by default (truncating is default)
 350              * 0 if -notruncate is given
 351              */
 352             case TRNCSW:
 353                 trnflag = 2;
 354                 continue;
 355             case NTRNCSW:
 356                 trnflag = 0;
 357                 continue;
 358
 359             case FILESW:
 360                 if (!(cp = *argp++) || *cp == '-')
 361                     adios (NULL, "missing argument to %s", argp[-2]);
 362                 from = path (cp, TFILE);
 363
 364                 /*
 365                  * If the truncate file is in default state,
 366                  * change to not truncate.
 367                  */
 368                 if (trnflag == 1)
 369                     trnflag = 0;
 370                 continue;
 371
 372             case SILSW:
 373                 noisy = 0;
 374                 continue;
 375             case NSILSW:
 376                 noisy++;
 377                 continue;
 378
 379             case FORMSW:
 380                 if (!(form = *argp++) || *form == '-')
 381                     adios (NULL, "missing argument to %s", argp[-2]);
 382                 format = NULL;
 383                 continue;
 384             case FMTSW:
 385                 if (!(format = *argp++) || *format == '-')
 386                     adios (NULL, "missing argument to %s", argp[-2]);
 387                 form = NULL;
 388                 continue;
 389
 390             case WIDTHSW:
 391                 if (!(cp = *argp++) || *cp == '-')
 392                     adios (NULL, "missing argument to %s", argp[-2]);
 393                 width = atoi (cp);
 394                 continue;
 395
 396             case HOSTSW:
 397                 if (!(host = *argp++) || *host == '-')
 398                     adios (NULL, "missing argument to %s", argp[-2]);
 399                 continue;
 400             case USERSW:
 401                 if (!(user = *argp++) || *user == '-')
 402                     adios (NULL, "missing argument to %s", argp[-2]);
 403                 continue;
 404
 405             case PACKSW:
 406 #ifndef POP
 407                 if (!(cp = *argp++) || *cp == '-')
 408                     adios (NULL, "missing argument to %s", argp[-2]);
 409 #else /* POP */
 410                 if (!(packfile = *argp++) || *packfile == '-')
 411                     adios (NULL, "missing argument to %s", argp[-2]);
 412 #endif /* POP */
 413                 continue;
 414             case NPACKSW:
 415 #ifdef POP
 416                 packfile = NULL;
 417 #endif /* POP */
 418                 continue;
 419
 420             case APOPSW:
 421                 rpop = -1;
 422                 continue;
 423             case NAPOPSW:
 424                 rpop = 0;
 425                 continue;
 426
 427             case RPOPSW:
 428                 rpop = 1;
 429                 continue;
 430             case NRPOPSW:
 431                 rpop = 0;
 432                 continue;
 433
 434             case KPOPSW:
 435                 kpop = 1;
 436                 continue;
 437
 438             case SNOOPSW:
 439                 snoop++;
 440                 continue;
 441
 442             case SASLSW:
 443                 sasl++;
 444                 continue;
 445
 446             case SASLMECHSW:
 447                 if (!(saslmech = *argp++) || *saslmech == '-')
 448                     adios (NULL, "missing argument to %s", argp[-2]);
 449                 continue;
 450             case PROXYSW:
 451                 if (!(proxy = *argp++) || *proxy == '-')
 452                     adios (NULL, "missing argument to %s", argp[-2]);
 453                 continue;
 454             }
 455         }
 456         if (*cp == '+' || *cp == '@') {
 457             if (folder)
 458                 adios (NULL, "only one folder at a time!");
 459             else
 460                 folder = pluspath (cp);
 461         } else {
 462             adios (NULL, "usage: %s [+folder] [switches]", invo_name);
 463         }
 464     }
 465
 466     /* NOTE: above this point you should use TRYDROPGROUPPRIVS(),
 467      * not DROPGROUPPRIVS().
 468      */
 469 #ifdef POP
 470     if (host && !*host)
 471         host = NULL;
 472     if (from || !host || rpop <= 0)
 473         DROPUSERPRIVS();
 474 #endif /* POP */
 475
 476     /* guarantee dropping group priveleges; we might not have done so earlier */
 477     DROPGROUPPRIVS();
 478
 479     /*
 480      * Where are we getting the new mail?
 481      */
 482     if (from)
 483         inc_type = INC_FILE;
 484 #ifdef POP
 485     else if (host)
 486         inc_type = INC_POP;
 487 #endif
 488     else
 489         inc_type = INC_FILE;
 490
 491 #ifdef POP
 492     /*
 493      * Are we getting the mail from
 494      * a POP server?
 495      */
 496     if (inc_type == INC_POP) {
 497         if (user == NULL)
 498             user = getusername ();
 499         if ( strcmp( POPSERVICE, "kpop" ) == 0 ) {
 500             kpop = 1;
 501         }
 502         if (kpop || sasl || ( rpop > 0))
 503             pass = getusername ();
 504         else
 505             ruserpass (host, &user, &pass);
 506
 507         /*
 508          * initialize POP connection
 509          */
 510         if (pop_init (host, user, pass, proxy, snoop, kpop ? 1 : rpop, kpop,
 511                       sasl, saslmech) == NOTOK)
 512             adios (NULL, "%s", response);
 513
 514         /* Check if there are any messages */
 515         if (pop_stat (&nmsgs, &nbytes) == NOTOK)
 516             adios (NULL, "%s", response);
 517
 518         if (rpop > 0)
 519             DROPUSERPRIVS();
 520         if (nmsgs == 0) {
 521             pop_quit();
 522             adios (NULL, "no mail to incorporate");
 523         }
 524     }
 525 #endif /* POP */
 526
 527     /*
 528      * We will get the mail from a file
 529      * (typically the standard maildrop)
 530      */
 531
 532     if (inc_type == INC_FILE) {
 533         if (from)
 534             newmail = from;
 535         else if ((newmail = getenv ("MAILDROP")) && *newmail)
 536             newmail = m_mailpath (newmail);
 537         else if ((newmail = context_find ("maildrop")) && *newmail)
 538             newmail = m_mailpath (newmail);
 539         else {
 540             newmail = concat (MAILDIR, "/", MAILFIL, NULL);
 541         }
 542         if (stat (newmail, &s1) == NOTOK || s1.st_size == 0)
 543             adios (NULL, "no mail to incorporate");
 544
 545         if ((cp = strdup(newmail)) == (char *)0)
 546             adios (maildir, "error allocating memory to copy newmail");
 547
 548         newmail = cp;
 549     }
 550
 551 #ifdef POP
 552     /* skip the folder setup */
 553     if ((inc_type == INC_POP) && packfile)
 554         goto go_to_it;
 555 #endif /* POP */
 556
 557     if (!context_find ("path"))
 558         free (path ("./", TFOLDER));
 559     if (!folder)
 560         folder = getfolder (0);
 561     maildir = m_maildir (folder);
 562
 563     if ((maildir_copy = strdup(maildir)) == (char *)0)
 564         adios (maildir, "error allocating memory to copy maildir");
 565
 566     if (noisy)
 567         create_folder(maildir, 0, done);
 568     else
 569         done (1);
 570
 571     if (chdir (maildir) == NOTOK)
 572         adios (maildir, "unable to change directory to");
 573
 574     /* read folder and create message structure */
 575     if (!(mp = folder_read (folder)))
 576         adios (NULL, "unable to read folder %s", folder);
 577
 578 #ifdef POP
 579 go_to_it:
 580 #endif /* POP */
 581
 582     if (inc_type == INC_FILE) {
 583         if (access (newmail, W_OK) != NOTOK) {
 584             locked++;
 585             if (trnflag) {
 586                 SIGNAL (SIGHUP, SIG_IGN);
 587                 SIGNAL (SIGINT, SIG_IGN);
 588                 SIGNAL (SIGQUIT, SIG_IGN);
 589                 SIGNAL (SIGTERM, SIG_IGN);
 590             }
 591
 592             GETGROUPPRIVS();       /* Reset gid to lock mail file */
 593             in = lkfopen (newmail, "r");
 594             DROPGROUPPRIVS();
 595             if (in == NULL)
 596                 adios (NULL, "unable to lock and fopen %s", newmail);
 597             fstat (fileno(in), &s1);
 598         } else {
 599             trnflag = 0;
 600             if ((in = fopen (newmail, "r")) == NULL)
 601                 adios (newmail, "unable to read");
 602         }
 603     }
 604
 605     /* This shouldn't be necessary but it can't hurt. */
 606     DROPGROUPPRIVS();
 607
 608     if (audfile) {
 609         if ((i = stat (audfile, &st)) == NOTOK)
 610             advise (NULL, "Creating Receive-Audit: %s", audfile);
 611         if ((aud = fopen (audfile, "a")) == NULL)
 612             adios (audfile, "unable to append to");
 613         else if (i == NOTOK)
 614             chmod (audfile, m_gmprot ());
 615
 616 #ifdef POP
 617         fprintf (aud, from ? "<<inc>> %s -ms %s\n"
 618                  : host ? "<<inc>> %s -host %s -user %s%s\n"
 619                  : "<<inc>> %s\n",
 620                  dtimenow (0), from ? from : host, user,
 621                  rpop < 0 ? " -apop" : rpop > 0 ? " -rpop" : "");
 622 #else /* POP */
 623         fprintf (aud, from ? "<<inc>> %s  -ms %s\n" : "<<inc>> %s\n",
 624                  dtimenow (0), from);
 625 #endif /* POP */
 626     }
 627
 628 #ifdef MHE
 629     if (context_find ("mhe")) {
 630         cp = concat (maildir, "/++", NULL);
 631         i = stat (cp, &st);
 632         if ((mhe = fopen (cp, "a")) == NULL)
 633             admonish (cp, "unable to append to");
 634         else
 635             if (i == NOTOK)
 636                 chmod (cp, m_gmprot ());
 637         free (cp);
 638     }
 639 #endif /* MHE */
 640
 641     /* Get new format string */
 642     nfs = new_fs (form, format, FORMAT);
 643
 644     if (noisy) {
 645         printf ("Incorporating new mail into %s...\n\n", folder);
 646         fflush (stdout);
 647     }
 648
 649 #ifdef POP
 650     /*
 651      * Get the mail from a POP server
 652      */
 653     if (inc_type == INC_POP) {
 654         if (packfile) {
 655             packfile = path (packfile, TFILE);
 656             if (stat (packfile, &st) == NOTOK) {
 657                 if (errno != ENOENT)
 658                     adios (packfile, "error on file");
 659                 cp = concat ("Create file \"", packfile, "\"? ", NULL);
 660                 if (noisy && !getanswer (cp))
 661                     done (1);
 662                 free (cp);
 663             }
 664             msgnum = map_count ();
 665             if ((pd = mbx_open (packfile, mbx_style, getuid(), getgid(), m_gmprot()))
 666                 == NOTOK)
 667                 adios (packfile, "unable to open");
 668             if ((pf = fdopen (pd, "w+")) == NULL)
 669                 adios (NULL, "unable to fdopen %s", packfile);
 670         } else {
 671             hghnum = msgnum = mp->hghmsg;
 672             /*
 673              * Check if we have enough message space for all the new
 674              * messages.  If not, then realloc the folder and add enough
 675              * space for all new messages plus 10 additional slots.
 676              */
 677             if (mp->hghmsg + nmsgs >= mp->hghoff
 678                 && !(mp = folder_realloc (mp, mp->lowoff, mp->hghmsg + nmsgs + 10)))
 679                 adios (NULL, "unable to allocate folder storage");
 680         }
 681
 682         for (i = 1; i <= nmsgs; i++) {
 683             msgnum++;
 684             if (packfile) {
 685                 fseek (pf, 0L, SEEK_CUR);
 686                 pos = ftell (pf);
 687                 size = 0;
 688                 fwrite (mmdlm1, 1, strlen (mmdlm1), pf);
 689                 start = ftell (pf);
 690
 691                 if (pop_retr (i, pop_pack) == NOTOK)
 692                     adios (NULL, "%s", response);
 693
 694                 fseek (pf, 0L, SEEK_CUR);
 695                 stop = ftell (pf);
 696                 if (fflush (pf))
 697                     adios (packfile, "write error on");
 698                 fseek (pf, start, SEEK_SET);
 699             } else {
 700                 cp = getcpy (m_name (msgnum));
 701                 if ((pf = fopen (cp, "w+")) == NULL)
 702                     adios (cp, "unable to write");
 703                 chmod (cp, m_gmprot ());
 704                 start = stop = 0L;
 705
 706                 if (pop_retr (i, pop_action) == NOTOK)
 707                     adios (NULL, "%s", response);
 708
 709                 if (fflush (pf))
 710                     adios (cp, "write error on");
 711                 fseek (pf, 0L, SEEK_SET);
 712             }
 713             switch (p = scan (pf, msgnum, 0, nfs, width,
 714                               packfile ? 0 : msgnum == mp->hghmsg + 1 && chgflag,
 715                               1, NULL, stop - start, noisy)) {
 716             case SCNEOF:
 717                 printf ("%*d  empty\n", DMAXFOLDER, msgnum);
 718                 break;
 719
 720             case SCNFAT:
 721                 trnflag = 0;
 722                 noisy++;
 723                 /* advise (cp, "unable to read"); already advised */
 724                 /* fall thru */
 725
 726             case SCNERR:
 727             case SCNNUM:
 728                 break;
 729
 730             case SCNMSG:
 731             case SCNENC:
 732             default:
 733                 if (aud)
 734                     fputs (scanl, aud);
 735 # ifdef MHE
 736                 if (mhe)
 737                     fputs (scanl, mhe);
 738 # endif /* MHE */
 739                 if (noisy)
 740                     fflush (stdout);
 741                 if (!packfile) {
 742                     clear_msg_flags (mp, msgnum);
 743                     set_exists (mp, msgnum);
 744                     set_unseen (mp, msgnum);
 745                     mp->msgflags |= SEQMOD;
 746                 }
 747                 break;
 748             }
 749             if (packfile) {
 750                 fseek (pf, stop, SEEK_SET);
 751                 fwrite (mmdlm2, 1, strlen (mmdlm2), pf);
 752                 if (fflush (pf) || ferror (pf)) {
 753                     int e = errno;
 754                     pop_quit ();
 755                     errno = e;
 756                     adios (packfile, "write error on");
 757                 }
 758                 map_write (packfile, pd, 0, 0L, start, stop, pos, size, noisy);
 759             } else {
 760                 if (ferror(pf) || fclose (pf)) {
 761                     int e = errno;
 762                     unlink (cp);
 763                     pop_quit ();
 764                     errno = e;
 765                     adios (cp, "write error on");
 766                 }
 767                 free (cp);
 768             }
 769
 770             if (trnflag && pop_dele (i) == NOTOK)
 771                 adios (NULL, "%s", response);
 772         }
 773
 774         if (pop_quit () == NOTOK)
 775             adios (NULL, "%s", response);
 776         if (packfile) {
 777             mbx_close (packfile, pd);
 778             pd = NOTOK;
 779         }
 780     }
 781 #endif /* POP */
 782
 783     /*
 784      * Get the mail from file (usually mail spool)
 785      */
 786     if (inc_type == INC_FILE) {
 787         m_unknown (in);         /* the MAGIC invocation... */
 788         hghnum = msgnum = mp->hghmsg;
 789         for (i = 0;;) {
 790             /*
 791              * Check if we need to allocate more space for message status.
 792              * If so, then add space for an additional 100 messages.
 793              */
 794             if (msgnum >= mp->hghoff
 795                 && !(mp = folder_realloc (mp, mp->lowoff, mp->hghoff + 100))) {
 796                 advise (NULL, "unable to allocate folder storage");
 797                 i = NOTOK;
 798                 break;
 799             }
 800
 801 #if 0
 802             /* copy file from spool to tmp file */
 803             tmpfilenam = m_scratch ("", invo_name);
 804             if ((fd = creat (tmpfilenam, m_gmprot ())) == NOTOK)
 805                 adios (tmpfilenam, "unable to create");
 806             chmod (tmpfilenam, m_gmprot ());
 807             if (!(in2 = fdopen (fd, "r+")))
 808                 adios (tmpfilenam, "unable to access");
 809             cpymsg (in, in2);
 810
 811             /* link message into folder */
 812             newmsg = folder_addmsg(mp, tmpfilenam);
 813 #endif
 814             /* create scanline for new message */
 815             switch (i = scan (in, msgnum + 1, msgnum + 1, nfs, width,
 816                               msgnum == hghnum && chgflag, 1, NULL, 0L, noisy)) {
 817             case SCNFAT:
 818             case SCNEOF:
 819                 break;
 820
 821             case SCNERR:
 822                 if (aud)
 823                     fputs ("inc aborted!\n", aud);
 824                 advise (NULL, "aborted!");      /* doesn't clean up locks! */
 825                 break;
 826
 827             case SCNNUM:
 828                 advise (NULL, "BUG in %s, number out of range", invo_name);
 829                 break;
 830
 831             default:
 832                 advise (NULL, "BUG in %s, scan() botch (%d)", invo_name, i);
 833                 break;
 834
 835             case SCNMSG:
 836             case SCNENC:
 837                 /*
 838                  *  Run the external program hook on the message.
 839                  */
 840
 841                 (void)snprintf(b, sizeof (b), "%s/%d", maildir_copy, msgnum + 1);
 842                 (void)ext_hook("add-hook", b, (char *)0);
 843
 844                 if (aud)
 845                     fputs (scanl, aud);
 846 #ifdef MHE
 847                 if (mhe)
 848                     fputs (scanl, mhe);
 849 #endif /* MHE */
 850                 if (noisy)
 851                     fflush (stdout);
 852
 853                 msgnum++;
 854                 mp->hghmsg++;
 855                 mp->nummsg++;
 856                 if (mp->lowmsg == 0) mp->lowmsg = 1;
 857
 858                 clear_msg_flags (mp, msgnum);
 859                 set_exists (mp, msgnum);
 860                 set_unseen (mp, msgnum);
 861                 mp->msgflags |= SEQMOD;
 862                 continue;
 863             }
 864             break;
 865         }
 866     }
 867
 868 #ifdef POP
 869     if (p < 0) {                /* error */
 870 #else
 871     if (i < 0) {                /* error */
 872 #endif
 873         if (locked) {
 874             GETGROUPPRIVS();      /* Be sure we can unlock mail file */
 875             (void) lkfclose (in, newmail); in = NULL;
 876             DROPGROUPPRIVS();    /* And then return us to normal privileges */
 877         } else {
 878             fclose (in); in = NULL;
 879         }
 880         adios (NULL, "failed");
 881     }
 882
 883     if (aud)
 884         fclose (aud);
 885
 886 #ifdef MHE
 887     if (mhe)
 888         fclose (mhe);
 889 #endif /* MHE */
 890
 891     if (noisy)
 892         fflush (stdout);
 893
 894 #ifdef POP
 895     if ((inc_type == INC_POP) && packfile)
 896         done (0);
 897 #endif /* POP */
 898
 899     /*
 900      * truncate file we are incorporating from
 901      */
 902     if (inc_type == INC_FILE) {
 903         if (trnflag) {
 904             if (stat (newmail, &st) != NOTOK && s1.st_mtime != st.st_mtime)
 905                 advise (NULL, "new messages have arrived!\007");
 906             else {
 907                 if ((i = creat (newmail, 0600)) != NOTOK)
 908                     close (i);
 909                 else
 910                     admonish (newmail, "error zero'ing");
 911                 unlink(map_name(newmail));
 912             }
 913         } else {
 914             if (noisy)
 915                 printf ("%s not zero'd\n", newmail);
 916         }
 917     }
 918
 919     if (msgnum == hghnum) {
 920         admonish (NULL, "no messages incorporated");
 921     } else {
 922         context_replace (pfolder, folder);      /* update current folder */
 923         if (chgflag)
 924             mp->curmsg = hghnum + 1;
 925         mp->hghmsg = msgnum;
 926         if (mp->lowmsg == 0)
 927             mp->lowmsg = 1;
 928         if (chgflag)            /* sigh... */
 929             seq_setcur (mp, mp->curmsg);
 930     }
 931
 932     /*
 933      * unlock the mail spool
 934      */
 935     if (inc_type == INC_FILE) {
 936         if (locked) {
 937            GETGROUPPRIVS();        /* Be sure we can unlock mail file */
 938            (void) lkfclose (in, newmail); in = NULL;
 939            DROPGROUPPRIVS();       /* And then return us to normal privileges */
 940         } else {
 941             fclose (in); in = NULL;
 942         }
 943     }
 944
 945     seq_setunseen (mp, 0);      /* set the Unseen-Sequence */
 946     seq_save (mp);              /* synchronize sequences   */
 947     context_save ();            /* save the context file   */
 948     return done (0);
 949 }
 950
 951
 952 #if 0
 953
 954 /*
 955  * Copy message message from spool into
 956  * temporary file.  Massage the "From " line
 957  * while copying.
 958  */
 959
 960 cpymsg (FILE *in, FILE *out)
 961 {
 962     int state;
 963     char *tmpbuf, name[NAMESZ];
 964
 965     for (;;) {
 966         state = m_getfld (state, name, tmpbuf, rlwidth, in);
 967         switch (state) {
 968         case FLD:
 969         case FLDPLUS:
 970             break;
 971         case BODY:
 972             break;
 973         case LENERR:
 974         case FMTERR:
 975             break;
 976         case FILEEOF:
 977             break;
 978         default:
 979         }
 980     }
 981 }
 982 #endif /* if 0 */
 983
 984
 985 int
 986 done (int status)
 987 {
 988 #ifdef POP
 989     if (packfile && pd != NOTOK)
 990         mbx_close (packfile, pd);
 991 #endif /* POP */
 992     if (locked)
 993     {
 994         GETGROUPPRIVS();
 995         lkfclose(in, newmail);
 996         DROPGROUPPRIVS();
 997     }
 998     exit (status);
 999     return 1;  /* dead code to satisfy the compiler */
1000 }
1001
1002 #ifdef POP
1003 static int
1004 pop_action (char *s)
1005 {
1006     fprintf (pf, "%s\n", s);
1007     stop += strlen (s) + 1;
1008     return 0;  /* Is return value used?  This was missing before 1999-07-15. */
1009 }
1010
1011 static int
1012 pop_pack (char *s)
1013 {
1014     int j;
1015     char buffer[BUFSIZ];
1016
1017     snprintf (buffer, sizeof(buffer), "%s\n", s);
1018     for (j = 0; (j = stringdex (mmdlm1, buffer)) >= 0; buffer[j]++)
1019         continue;
1020     for (j = 0; (j = stringdex (mmdlm2, buffer)) >= 0; buffer[j]++)
1021         continue;
1022     fputs (buffer, pf);
1023     size += strlen (buffer) + 1;
1024     return 0;  /* Is return value used?  This was missing before 1999-07-15. */
1025 }
1026
1027 static int
1028 map_count (void)
1029 {
1030     int md;
1031     char *cp;
1032     struct drop d;
1033     struct stat st;
1034
1035     if (stat (packfile, &st) == NOTOK)
1036         return 0;
1037     if ((md = open (cp = map_name (packfile), O_RDONLY)) == NOTOK
1038             || map_chk (cp, md, &d, (long) st.st_size, 1)) {
1039         if (md != NOTOK)
1040             close (md);
1041         return 0;
1042     }
1043     close (md);
1044     return (d.d_id);
1045 }
1046 #endif /* POP */