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 #define PROXYSW                   26
 135     { "proxy command", POPminc(-5) },
 136     { NULL, 0 }
 137 };
 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, *proxy = 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     char        *maildir_copy;          /* copy of mail directory because the static gets overwritten */
 250
 251 #ifdef POP
 252     int nmsgs, nbytes, p = 0;
 253     char *pass = NULL;
 254     char *MAILHOST_env_variable;
 255 #endif
 256
 257 #ifdef MHE
 258     FILE *mhe = NULL;
 259 #endif
 260
 261 #ifdef HESIOD
 262     struct hes_postoffice *po;
 263 #endif
 264
 265 /* absolutely the first thing we do is save our privileges,
 266  * and drop them if we can.
 267  */
 268     SAVEGROUPPRIVS();
 269     TRYDROPGROUPPRIVS();
 270
 271 #ifdef LOCALE
 272     setlocale(LC_ALL, "");
 273 #endif
 274     invo_name = r1bindex (argv[0], '/');
 275
 276     /* read user profile/context */
 277     context_read();
 278
 279     mts_init (invo_name);
 280     arguments = getarguments (invo_name, argc, argv, 1);
 281     argp = arguments;
 282
 283 #ifdef POP
 284     /*
 285      * Scheme is:
 286      *        use MAILHOST environment variable if present,
 287      *  else try Hesiod.
 288      *  If that fails, use the default (if any)
 289      *  provided by mts.conf in mts_init()
 290      */
 291     if ((MAILHOST_env_variable = getenv("MAILHOST")) != NULL)
 292         pophost = MAILHOST_env_variable;
 293 # ifdef HESIOD
 294     else if ((po = hes_getmailhost(getusername())) != NULL &&
 295              strcmp(po->po_type, "POP") == 0)
 296         pophost = po->po_host;
 297 # endif /* HESIOD */
 298     /*
 299      * If there is a valid "pophost" entry in mts.conf,
 300      * then use it as the default host.
 301      */
 302     if (pophost && *pophost)
 303         host = pophost;
 304
 305     if ((cp = getenv ("MHPOPDEBUG")) && *cp)
 306         snoop++;
 307 #endif /* POP */
 308
 309     rpop = 0;
 310
 311     while ((cp = *argp++)) {
 312         if (*cp == '-') {
 313             switch (smatch (++cp, switches)) {
 314             case AMBIGSW:
 315                 ambigsw (cp, switches);
 316                 done (1);
 317             case UNKWNSW:
 318                 adios (NULL, "-%s unknown", cp);
 319
 320             case HELPSW:
 321                 snprintf (buf, sizeof(buf), "%s [+folder] [switches]", invo_name);
 322                 print_help (buf, switches, 1);
 323                 done (1);
 324             case VERSIONSW:
 325                 print_version(invo_name);
 326                 done (1);
 327
 328             case AUDSW:
 329                 if (!(cp = *argp++) || *cp == '-')
 330                     adios (NULL, "missing argument to %s", argp[-2]);
 331                 audfile = getcpy (m_maildir (cp));
 332                 continue;
 333             case NAUDSW:
 334                 audfile = NULL;
 335                 continue;
 336
 337             case CHGSW:
 338                 chgflag++;
 339                 continue;
 340             case NCHGSW:
 341                 chgflag = 0;
 342                 continue;
 343
 344             /*
 345              * The flag `trnflag' has the value:
 346              *
 347              * 2 if -truncate is given
 348              * 1 by default (truncating is default)
 349              * 0 if -notruncate is given
 350              */
 351             case TRNCSW:
 352                 trnflag = 2;
 353                 continue;
 354             case NTRNCSW:
 355                 trnflag = 0;
 356                 continue;
 357
 358             case FILESW:
 359                 if (!(cp = *argp++) || *cp == '-')
 360                     adios (NULL, "missing argument to %s", argp[-2]);
 361                 from = path (cp, TFILE);
 362
 363                 /*
 364                  * If the truncate file is in default state,
 365                  * change to not truncate.
 366                  */
 367                 if (trnflag == 1)
 368                     trnflag = 0;
 369                 continue;
 370
 371             case SILSW:
 372                 noisy = 0;
 373                 continue;
 374             case NSILSW:
 375                 noisy++;
 376                 continue;
 377
 378             case FORMSW:
 379                 if (!(form = *argp++) || *form == '-')
 380                     adios (NULL, "missing argument to %s", argp[-2]);
 381                 format = NULL;
 382                 continue;
 383             case FMTSW:
 384                 if (!(format = *argp++) || *format == '-')
 385                     adios (NULL, "missing argument to %s", argp[-2]);
 386                 form = NULL;
 387                 continue;
 388
 389             case WIDTHSW:
 390                 if (!(cp = *argp++) || *cp == '-')
 391                     adios (NULL, "missing argument to %s", argp[-2]);
 392                 width = atoi (cp);
 393                 continue;
 394
 395             case HOSTSW:
 396                 if (!(host = *argp++) || *host == '-')
 397                     adios (NULL, "missing argument to %s", argp[-2]);
 398                 continue;
 399             case USERSW:
 400                 if (!(user = *argp++) || *user == '-')
 401                     adios (NULL, "missing argument to %s", argp[-2]);
 402                 continue;
 403
 404             case PACKSW:
 405 #ifndef POP
 406                 if (!(cp = *argp++) || *cp == '-')
 407                     adios (NULL, "missing argument to %s", argp[-2]);
 408 #else /* POP */
 409                 if (!(packfile = *argp++) || *packfile == '-')
 410                     adios (NULL, "missing argument to %s", argp[-2]);
 411 #endif /* POP */
 412                 continue;
 413             case NPACKSW:
 414 #ifdef POP
 415                 packfile = NULL;
 416 #endif /* POP */
 417                 continue;
 418
 419             case APOPSW:
 420                 rpop = -1;
 421                 continue;
 422             case NAPOPSW:
 423                 rpop = 0;
 424                 continue;
 425
 426             case RPOPSW:
 427                 rpop = 1;
 428                 continue;
 429             case NRPOPSW:
 430                 rpop = 0;
 431                 continue;
 432
 433             case KPOPSW:
 434                 kpop = 1;
 435                 continue;
 436
 437             case SNOOPSW:
 438                 snoop++;
 439                 continue;
 440
 441             case SASLSW:
 442                 sasl++;
 443                 continue;
 444
 445             case SASLMECHSW:
 446                 if (!(saslmech = *argp++) || *saslmech == '-')
 447                     adios (NULL, "missing argument to %s", argp[-2]);
 448                 continue;
 449             case PROXYSW:
 450                 if (!(proxy = *argp++) || *proxy == '-')
 451                     adios (NULL, "missing argument to %s", argp[-2]);
 452                 continue;
 453             }
 454         }
 455         if (*cp == '+' || *cp == '@') {
 456             if (folder)
 457                 adios (NULL, "only one folder at a time!");
 458             else
 459                 folder = path (cp + 1, *cp == '+' ? TFOLDER : TSUBCWF);
 460         } else {
 461             adios (NULL, "usage: %s [+folder] [switches]", invo_name);
 462         }
 463     }
 464
 465     /* NOTE: above this point you should use TRYDROPGROUPPRIVS(),
 466      * not DROPGROUPPRIVS().
 467      */
 468 #ifdef POP
 469     if (host && !*host)
 470         host = NULL;
 471     if (from || !host || rpop <= 0)
 472         DROPUSERPRIVS();
 473 #endif /* POP */
 474
 475     /* guarantee dropping group priveleges; we might not have done so earlier */
 476     DROPGROUPPRIVS();
 477
 478     /*
 479      * Where are we getting the new mail?
 480      */
 481     if (from)
 482         inc_type = INC_FILE;
 483 #ifdef POP
 484     else if (host)
 485         inc_type = INC_POP;
 486 #endif
 487     else
 488         inc_type = INC_FILE;
 489
 490 #ifdef POP
 491     /*
 492      * Are we getting the mail from
 493      * a POP server?
 494      */
 495     if (inc_type == INC_POP) {
 496         if (user == NULL)
 497             user = getusername ();
 498         if ( strcmp( POPSERVICE, "kpop" ) == 0 ) {
 499             kpop = 1;
 500         }
 501         if (kpop || sasl || ( rpop > 0))
 502             pass = getusername ();
 503         else
 504             ruserpass (host, &user, &pass);
 505
 506         /*
 507          * initialize POP connection
 508          */
 509         if (pop_init (host, user, pass, proxy, snoop, kpop ? 1 : rpop, kpop,
 510                       sasl, saslmech) == NOTOK)
 511             adios (NULL, "%s", response);
 512
 513         /* Check if there are any messages */
 514         if (pop_stat (&nmsgs, &nbytes) == NOTOK)
 515             adios (NULL, "%s", response);
 516
 517         if (rpop > 0)
 518             DROPUSERPRIVS();
 519         if (nmsgs == 0) {
 520             pop_quit();
 521             adios (NULL, "no mail to incorporate");
 522         }
 523     }
 524 #endif /* POP */
 525
 526     /*
 527      * We will get the mail from a file
 528      * (typically the standard maildrop)
 529      */
 530
 531     if (inc_type == INC_FILE) {
 532         if (from)
 533             newmail = from;
 534         else if ((newmail = getenv ("MAILDROP")) && *newmail)
 535             newmail = m_mailpath (newmail);
 536         else if ((newmail = context_find ("maildrop")) && *newmail)
 537             newmail = m_mailpath (newmail);
 538         else {
 539             newmail = concat (MAILDIR, "/", MAILFIL, NULL);
 540         }
 541         if (stat (newmail, &s1) == NOTOK || s1.st_size == 0)
 542             adios (NULL, "no mail to incorporate");
 543
 544         if ((cp = strdup(newmail)) == (char *)0)
 545             adios (maildir, "error allocating memory to copy newmail");
 546
 547         newmail = cp;
 548     }
 549
 550 #ifdef POP
 551     /* skip the folder setup */
 552     if ((inc_type == INC_POP) && packfile)
 553         goto go_to_it;
 554 #endif /* POP */
 555
 556     if (!context_find ("path"))
 557         free (path ("./", TFOLDER));
 558     if (!folder)
 559         folder = getfolder (0);
 560     maildir = m_maildir (folder);
 561
 562     if ((maildir_copy = strdup(maildir)) == (char *)0)
 563         adios (maildir, "error allocating memory to copy maildir");
 564
 565     if (stat (maildir, &st) == NOTOK) {
 566         if (errno != ENOENT)
 567             adios (maildir, "error on folder");
 568         cp = concat ("Create folder \"", maildir, "\"? ", NULL);
 569         if (noisy && !getanswer (cp))
 570             done (1);
 571         free (cp);
 572         if (!makedir (maildir))
 573             adios (NULL, "unable to create folder %s", maildir);
 574     }
 575
 576     if (chdir (maildir) == NOTOK)
 577         adios (maildir, "unable to change directory to");
 578
 579     /* read folder and create message structure */
 580     if (!(mp = folder_read (folder)))
 581         adios (NULL, "unable to read folder %s", folder);
 582
 583 #ifdef POP
 584 go_to_it:
 585 #endif /* POP */
 586
 587     if (inc_type == INC_FILE) {
 588         if (access (newmail, W_OK) != NOTOK) {
 589             locked++;
 590             if (trnflag) {
 591                 SIGNAL (SIGHUP, SIG_IGN);
 592                 SIGNAL (SIGINT, SIG_IGN);
 593                 SIGNAL (SIGQUIT, SIG_IGN);
 594                 SIGNAL (SIGTERM, SIG_IGN);
 595             }
 596
 597             GETGROUPPRIVS();       /* Reset gid to lock mail file */
 598             in = lkfopen (newmail, "r");
 599             DROPGROUPPRIVS();
 600             if (in == NULL)
 601                 adios (NULL, "unable to lock and fopen %s", newmail);
 602             fstat (fileno(in), &s1);
 603         } else {
 604             trnflag = 0;
 605             if ((in = fopen (newmail, "r")) == NULL)
 606                 adios (newmail, "unable to read");
 607         }
 608     }
 609
 610     /* This shouldn't be necessary but it can't hurt. */
 611     DROPGROUPPRIVS();
 612
 613     if (audfile) {
 614         if ((i = stat (audfile, &st)) == NOTOK)
 615             advise (NULL, "Creating Receive-Audit: %s", audfile);
 616         if ((aud = fopen (audfile, "a")) == NULL)
 617             adios (audfile, "unable to append to");
 618         else if (i == NOTOK)
 619             chmod (audfile, m_gmprot ());
 620
 621 #ifdef POP
 622         fprintf (aud, from ? "<<inc>> %s -ms %s\n"
 623                  : host ? "<<inc>> %s -host %s -user %s%s\n"
 624                  : "<<inc>> %s\n",
 625                  dtimenow (0), from ? from : host, user,
 626                  rpop < 0 ? " -apop" : rpop > 0 ? " -rpop" : "");
 627 #else /* POP */
 628         fprintf (aud, from ? "<<inc>> %s  -ms %s\n" : "<<inc>> %s\n",
 629                  dtimenow (0), from);
 630 #endif /* POP */
 631     }
 632
 633 #ifdef MHE
 634     if (context_find ("mhe")) {
 635         cp = concat (maildir, "/++", NULL);
 636         i = stat (cp, &st);
 637         if ((mhe = fopen (cp, "a")) == NULL)
 638             admonish (cp, "unable to append to");
 639         else
 640             if (i == NOTOK)
 641                 chmod (cp, m_gmprot ());
 642         free (cp);
 643     }
 644 #endif /* MHE */
 645
 646     /* Get new format string */
 647     nfs = new_fs (form, format, FORMAT);
 648
 649     if (noisy) {
 650         printf ("Incorporating new mail into %s...\n\n", folder);
 651         fflush (stdout);
 652     }
 653
 654 #ifdef POP
 655     /*
 656      * Get the mail from a POP server
 657      */
 658     if (inc_type == INC_POP) {
 659         if (packfile) {
 660             packfile = path (packfile, TFILE);
 661             if (stat (packfile, &st) == NOTOK) {
 662                 if (errno != ENOENT)
 663                     adios (packfile, "error on file");
 664                 cp = concat ("Create file \"", packfile, "\"? ", NULL);
 665                 if (noisy && !getanswer (cp))
 666                     done (1);
 667                 free (cp);
 668             }
 669             msgnum = map_count ();
 670             if ((pd = mbx_open (packfile, mbx_style, getuid(), getgid(), m_gmprot()))
 671                 == NOTOK)
 672                 adios (packfile, "unable to open");
 673             if ((pf = fdopen (pd, "w+")) == NULL)
 674                 adios (NULL, "unable to fdopen %s", packfile);
 675         } else {
 676             hghnum = msgnum = mp->hghmsg;
 677             /*
 678              * Check if we have enough message space for all the new
 679              * messages.  If not, then realloc the folder and add enough
 680              * space for all new messages plus 10 additional slots.
 681              */
 682             if (mp->hghmsg + nmsgs >= mp->hghoff
 683                 && !(mp = folder_realloc (mp, mp->lowoff, mp->hghmsg + nmsgs + 10)))
 684                 adios (NULL, "unable to allocate folder storage");
 685         }
 686
 687         for (i = 1; i <= nmsgs; i++) {
 688             msgnum++;
 689             if (packfile) {
 690                 fseek (pf, 0L, SEEK_CUR);
 691                 pos = ftell (pf);
 692                 size = 0;
 693                 fwrite (mmdlm1, 1, strlen (mmdlm1), pf);
 694                 start = ftell (pf);
 695
 696                 if (pop_retr (i, pop_pack) == NOTOK)
 697                     adios (NULL, "%s", response);
 698
 699                 fseek (pf, 0L, SEEK_CUR);
 700                 stop = ftell (pf);
 701                 if (fflush (pf))
 702                     adios (packfile, "write error on");
 703                 fseek (pf, start, SEEK_SET);
 704             } else {
 705                 cp = getcpy (m_name (msgnum));
 706                 if ((pf = fopen (cp, "w+")) == NULL)
 707                     adios (cp, "unable to write");
 708                 chmod (cp, m_gmprot ());
 709                 start = stop = 0L;
 710
 711                 if (pop_retr (i, pop_action) == NOTOK)
 712                     adios (NULL, "%s", response);
 713
 714                 if (fflush (pf))
 715                     adios (cp, "write error on");
 716                 fseek (pf, 0L, SEEK_SET);
 717             }
 718             switch (p = scan (pf, msgnum, 0, nfs, width,
 719                               packfile ? 0 : msgnum == mp->hghmsg + 1 && chgflag,
 720                               1, NULL, stop - start, noisy)) {
 721             case SCNEOF:
 722                 printf ("%*d  empty\n", DMAXFOLDER, msgnum);
 723                 break;
 724
 725             case SCNFAT:
 726                 trnflag = 0;
 727                 noisy++;
 728                 /* advise (cp, "unable to read"); already advised */
 729                 /* fall thru */
 730
 731             case SCNERR:
 732             case SCNNUM:
 733                 break;
 734
 735             case SCNMSG:
 736             case SCNENC:
 737             default:
 738                 if (aud)
 739                     fputs (scanl, aud);
 740 # ifdef MHE
 741                 if (mhe)
 742                     fputs (scanl, mhe);
 743 # endif /* MHE */
 744                 if (noisy)
 745                     fflush (stdout);
 746                 if (!packfile) {
 747                     clear_msg_flags (mp, msgnum);
 748                     set_exists (mp, msgnum);
 749                     set_unseen (mp, msgnum);
 750                     mp->msgflags |= SEQMOD;
 751                 }
 752                 break;
 753             }
 754             if (packfile) {
 755                 fseek (pf, stop, SEEK_SET);
 756                 fwrite (mmdlm2, 1, strlen (mmdlm2), pf);
 757                 if (fflush (pf) || ferror (pf)) {
 758                     int e = errno;
 759                     pop_quit ();
 760                     errno = e;
 761                     adios (packfile, "write error on");
 762                 }
 763                 map_write (packfile, pd, 0, 0L, start, stop, pos, size, noisy);
 764             } else {
 765                 if (ferror(pf) || fclose (pf)) {
 766                     int e = errno;
 767                     unlink (cp);
 768                     pop_quit ();
 769                     errno = e;
 770                     adios (cp, "write error on");
 771                 }
 772                 free (cp);
 773             }
 774
 775             if (trnflag && pop_dele (i) == NOTOK)
 776                 adios (NULL, "%s", response);
 777         }
 778
 779         if (pop_quit () == NOTOK)
 780             adios (NULL, "%s", response);
 781         if (packfile) {
 782             mbx_close (packfile, pd);
 783             pd = NOTOK;
 784         }
 785     }
 786 #endif /* POP */
 787
 788     /*
 789      * Get the mail from file (usually mail spool)
 790      */
 791     if (inc_type == INC_FILE) {
 792         m_unknown (in);         /* the MAGIC invocation... */
 793         hghnum = msgnum = mp->hghmsg;
 794         for (i = 0;;) {
 795             /*
 796              * Check if we need to allocate more space for message status.
 797              * If so, then add space for an additional 100 messages.
 798              */
 799             if (msgnum >= mp->hghoff
 800                 && !(mp = folder_realloc (mp, mp->lowoff, mp->hghoff + 100))) {
 801                 advise (NULL, "unable to allocate folder storage");
 802                 i = NOTOK;
 803                 break;
 804             }
 805
 806 #if 0
 807             /* copy file from spool to tmp file */
 808             tmpfilenam = m_scratch ("", invo_name);
 809             if ((fd = creat (tmpfilenam, m_gmprot ())) == NOTOK)
 810                 adios (tmpfilenam, "unable to create");
 811             chmod (tmpfilenam, m_gmprot ());
 812             if (!(in2 = fdopen (fd, "r+")))
 813                 adios (tmpfilenam, "unable to access");
 814             cpymsg (in, in2);
 815
 816             /* link message into folder */
 817             newmsg = folder_addmsg(mp, tmpfilenam);
 818 #endif
 819             /* create scanline for new message */
 820             switch (i = scan (in, msgnum + 1, msgnum + 1, nfs, width,
 821                               msgnum == hghnum && chgflag, 1, NULL, 0L, noisy)) {
 822             case SCNFAT:
 823             case SCNEOF:
 824                 break;
 825
 826             case SCNERR:
 827                 if (aud)
 828                     fputs ("inc aborted!\n", aud);
 829                 advise (NULL, "aborted!");      /* doesn't clean up locks! */
 830                 break;
 831
 832             case SCNNUM:
 833                 advise (NULL, "BUG in %s, number out of range", invo_name);
 834                 break;
 835
 836             default:
 837                 advise (NULL, "BUG in %s, scan() botch (%d)", invo_name, i);
 838                 break;
 839
 840             case SCNMSG:
 841             case SCNENC:
 842                 /*
 843                  *  Run the external program hook on the message.
 844                  */
 845
 846                 (void)snprintf(b, sizeof (b), "%s/%d", maildir_copy, msgnum + 1);
 847                 (void)ext_hook("add-hook", b, (char *)0);
 848
 849                 if (aud)
 850                     fputs (scanl, aud);
 851 #ifdef MHE
 852                 if (mhe)
 853                     fputs (scanl, mhe);
 854 #endif /* MHE */
 855                 if (noisy)
 856                     fflush (stdout);
 857
 858                 msgnum++;
 859                 mp->hghmsg++;
 860                 mp->nummsg++;
 861                 if (mp->lowmsg == 0) mp->lowmsg = 1;
 862
 863                 clear_msg_flags (mp, msgnum);
 864                 set_exists (mp, msgnum);
 865                 set_unseen (mp, msgnum);
 866                 mp->msgflags |= SEQMOD;
 867                 continue;
 868             }
 869             break;
 870         }
 871     }
 872
 873 #ifdef POP
 874     if (p < 0) {                /* error */
 875 #else
 876     if (i < 0) {                /* error */
 877 #endif
 878         if (locked) {
 879             GETGROUPPRIVS();      /* Be sure we can unlock mail file */
 880             (void) lkfclose (in, newmail); in = NULL;
 881             DROPGROUPPRIVS();    /* And then return us to normal privileges */
 882         } else {
 883             fclose (in); in = NULL;
 884         }
 885         adios (NULL, "failed");
 886     }
 887
 888     if (aud)
 889         fclose (aud);
 890
 891 #ifdef MHE
 892     if (mhe)
 893         fclose (mhe);
 894 #endif /* MHE */
 895
 896     if (noisy)
 897         fflush (stdout);
 898
 899 #ifdef POP
 900     if ((inc_type == INC_POP) && packfile)
 901         done (0);
 902 #endif /* POP */
 903
 904     /*
 905      * truncate file we are incorporating from
 906      */
 907     if (inc_type == INC_FILE) {
 908         if (trnflag) {
 909             if (stat (newmail, &st) != NOTOK && s1.st_mtime != st.st_mtime)
 910                 advise (NULL, "new messages have arrived!\007");
 911             else {
 912                 if ((i = creat (newmail, 0600)) != NOTOK)
 913                     close (i);
 914                 else
 915                     admonish (newmail, "error zero'ing");
 916                 unlink(map_name(newmail));
 917             }
 918         } else {
 919             if (noisy)
 920                 printf ("%s not zero'd\n", newmail);
 921         }
 922     }
 923
 924     if (msgnum == hghnum) {
 925         admonish (NULL, "no messages incorporated");
 926     } else {
 927         context_replace (pfolder, folder);      /* update current folder */
 928         if (chgflag)
 929             mp->curmsg = hghnum + 1;
 930         mp->hghmsg = msgnum;
 931         if (mp->lowmsg == 0)
 932             mp->lowmsg = 1;
 933         if (chgflag)            /* sigh... */
 934             seq_setcur (mp, mp->curmsg);
 935     }
 936
 937     /*
 938      * unlock the mail spool
 939      */
 940     if (inc_type == INC_FILE) {
 941         if (locked) {
 942            GETGROUPPRIVS();        /* Be sure we can unlock mail file */
 943            (void) lkfclose (in, newmail); in = NULL;
 944            DROPGROUPPRIVS();       /* And then return us to normal privileges */
 945         } else {
 946             fclose (in); in = NULL;
 947         }
 948     }
 949
 950     seq_setunseen (mp, 0);      /* set the Unseen-Sequence */
 951     seq_save (mp);              /* synchronize sequences   */
 952     context_save ();            /* save the context file   */
 953     return done (0);
 954 }
 955
 956
 957 #if 0
 958
 959 /*
 960  * Copy message message from spool into
 961  * temporary file.  Massage the "From " line
 962  * while copying.
 963  */
 964
 965 cpymsg (FILE *in, FILE *out)
 966 {
 967     int state;
 968     char *tmpbuf, name[NAMESZ];
 969
 970     for (;;) {
 971         state = m_getfld (state, name, tmpbuf, rlwidth, in);
 972         switch (state) {
 973         case FLD:
 974         case FLDPLUS:
 975             break;
 976         case BODY:
 977             break;
 978         case LENERR:
 979         case FMTERR:
 980             break;
 981         case FILEEOF:
 982             break;
 983         default:
 984         }
 985     }
 986 }
 987 #endif /* if 0 */
 988
 989
 990 int
 991 done (int status)
 992 {
 993 #ifdef POP
 994     if (packfile && pd != NOTOK)
 995         mbx_close (packfile, pd);
 996 #endif /* POP */
 997     if (locked)
 998     {
 999         GETGROUPPRIVS();
1000         lkfclose(in, newmail);
1001         DROPGROUPPRIVS();
1002     }
1003     exit (status);
1004     return 1;  /* dead code to satisfy the compiler */
1005 }
1006
1007 #ifdef POP
1008 static int
1009 pop_action (char *s)
1010 {
1011     fprintf (pf, "%s\n", s);
1012     stop += strlen (s) + 1;
1013     return 0;  /* Is return value used?  This was missing before 1999-07-15. */
1014 }
1015
1016 static int
1017 pop_pack (char *s)
1018 {
1019     int j;
1020     char buffer[BUFSIZ];
1021
1022     snprintf (buffer, sizeof(buffer), "%s\n", s);
1023     for (j = 0; (j = stringdex (mmdlm1, buffer)) >= 0; buffer[j]++)
1024         continue;
1025     for (j = 0; (j = stringdex (mmdlm2, buffer)) >= 0; buffer[j]++)
1026         continue;
1027     fputs (buffer, pf);
1028     size += strlen (buffer) + 1;
1029     return 0;  /* Is return value used?  This was missing before 1999-07-15. */
1030 }
1031
1032 static int
1033 map_count (void)
1034 {
1035     int md;
1036     char *cp;
1037     struct drop d;
1038     struct stat st;
1039
1040     if (stat (packfile, &st) == NOTOK)
1041         return 0;
1042     if ((md = open (cp = map_name (packfile), O_RDONLY)) == NOTOK
1043             || map_chk (cp, md, &d, (long) st.st_size, 1)) {
1044         if (md != NOTOK)
1045             close (md);
1046         return 0;
1047     }
1048     close (md);
1049     return (d.d_id);
1050 }
1051 #endif /* POP */