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