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

   1
   2 /*
   3  * inc.c -- incorporate messages from a maildrop into a folder
   4  *
   5  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   6  * COPYRIGHT file in the root directory of the nmh distribution for
   7  * complete copyright information.
   8  */
   9
  10 #ifdef MAILGROUP
  11 /* Revised: Sat Apr 14 17:08:17 PDT 1990 (marvit@hplabs)
  12  *    Added hpux hacks to set and reset gid to be "mail" as needed. The reset
  13  *    is necessary so inc'ed mail is the group of the inc'er, rather than
  14  *    "mail". We setgid to egid only when [un]locking the mail file. This
  15  *    is also a major security precaution which will not be explained here.
  16  *
  17  * Fri Feb  7 16:04:57 PST 1992         John Romine <bug-mh@ics.uci.edu>
  18  *   NB: I'm not 100% sure that this setgid stuff is secure even now.
  19  *
  20  * See the *GROUPPRIVS() macros later. I'm reasonably happy with the setgid
  21  * attribute. Running setuid root is probably not a terribly good idea, though.
  22  *       -- Peter Maydell <pmaydell@chiark.greenend.org.uk>, 04/1998
  23  *
  24  * Peter Maydell's patch slightly modified for nmh 0.28-pre2.
  25  * Ruud de Rooij <ruud@debian.org>  Wed, 22 Jul 1998 13:24:22 +0200
  26  */
  27 #endif
  28
  29 #include <h/mh.h>
  30 #include <h/utils.h>
  31 #include <fcntl.h>
  32
  33 #include <h/dropsbr.h>
  34 #include <h/popsbr.h>
  35 #include <h/fmt_scan.h>
  36 #include <h/scansbr.h>
  37 #include <h/signals.h>
  38 #include <h/tws.h>
  39 #include <h/mts.h>
  40 #include <errno.h>
  41 #include <signal.h>
  42
  43 #ifndef CYRUS_SASL
  44 # define SASLminc(a) (a)
  45 #else
  46 # define SASLminc(a)  0
  47 #endif
  48
  49 #define INC_SWITCHES \
  50     X("audit audit-file", 0, AUDSW) \
  51     X("noaudit", 0, NAUDSW) \
  52     X("changecur", 0, CHGSW) \
  53     X("nochangecur", 0, NCHGSW) \
  54     X("file name", 0, FILESW) \
  55     X("form formatfile", 0, FORMSW) \
  56     X("format string", 5, FMTSW) \
  57     X("host hostname", 0, HOSTSW) \
  58     X("user username", 0, USERSW) \
  59     X("pack file", 0, PACKSW) \
  60     X("nopack", 0, NPACKSW) \
  61     X("port name/number", 0, PORTSW) \
  62     X("silent", 0, SILSW) \
  63     X("nosilent", 0, NSILSW) \
  64     X("truncate", 0, TRNCSW) \
  65     X("notruncate", 0, NTRNCSW) \
  66     X("width columns", 0, WIDTHSW) \
  67     X("version", 0, VERSIONSW) \
  68     X("help", 0, HELPSW) \
  69     X("snoop", -5, SNOOPSW) \
  70     X("sasl", SASLminc(-4), SASLSW) \
  71     X("nosasl", SASLminc(-6), NOSASLSW) \
  72     X("saslmech", SASLminc(-8), SASLMECHSW) \
  73     X("proxy command", 0, PROXYSW) \
  74
  75 #define X(sw, minchars, id) id,
  76 DEFINE_SWITCH_ENUM(INC);
  77 #undef X
  78
  79 #define X(sw, minchars, id) { sw, minchars, id },
  80 DEFINE_SWITCH_ARRAY(INC, switches);
  81 #undef X
  82
  83 /*
  84  * flags for the mail source
  85  */
  86 #define INC_FILE  0
  87 #define INC_POP   1
  88
  89 static int inc_type;
  90 static struct Maildir_entry {
  91         char *filename;
  92         time_t mtime;
  93 } *Maildir = NULL;
  94 static int num_maildir_entries = 0;
  95 static int snoop = 0;
  96
  97 extern char response[];
  98
  99 static int size;
 100 static long pos;
 101
 102 static int mbx_style = MMDF_FORMAT;
 103 static int pd = NOTOK;
 104
 105 static long start;
 106 static long stop;
 107
 108 static char *packfile = NULL;
 109 static FILE *pf = NULL;
 110
 111 /* This is an attempt to simplify things by putting all the
 112  * privilege ops into macros.
 113  * *GROUPPRIVS() is related to handling the setgid MAIL property,
 114  * and only applies if MAILGROUP is defined.
 115  * Basically, SAVEGROUPPRIVS() is called right at the top of main()
 116  * to initialise things, and then DROPGROUPPRIVS() and GETGROUPPRIVS()
 117  * do the obvious thing.
 118  *
 119  * There's probably a better implementation if we're allowed to use
 120  * BSD-style setreuid() rather than using POSIX saved-ids.
 121  * Anyway, if you're euid root it's a bit pointless to drop the group
 122  * permissions...
 123  *
 124  * I'm pretty happy that the security is good provided we aren't setuid root.
 125  * The only things we trust with group=mail privilege are lkfopen()
 126  * and lkfclose().
 127  */
 128
 129 /*
 130  * For setting and returning to "mail" gid
 131  */
 132 #ifdef MAILGROUP
 133 static int return_gid;
 134 #define TRYDROPGROUPPRIVS() DROPGROUPPRIVS()
 135 #define DROPGROUPPRIVS() setgid(getgid())
 136 #define GETGROUPPRIVS() setgid(return_gid)
 137 #define SAVEGROUPPRIVS() return_gid = getegid()
 138 #else
 139 /* define *GROUPPRIVS() as null; this avoids having lots of "#ifdef MAILGROUP"s */
 140 #define TRYDROPGROUPPRIVS()
 141 #define DROPGROUPPRIVS()
 142 #define GETGROUPPRIVS()
 143 #define SAVEGROUPPRIVS()
 144 #endif /* not MAILGROUP */
 145
 146 /* these variables have to be globals so that done() can correctly clean up the lockfile */
 147 static int locked = 0;
 148 static char *newmail;
 149 static FILE *in;
 150
 151 /*
 152  * prototypes
 153  */
 154 char *map_name(char *);
 155
 156 static void inc_done(int) NORETURN;
 157 static int pop_action(char *);
 158 static int pop_pack(char *);
 159 static int map_count(void);
 160
 161 int
 162 maildir_srt(const void *va, const void *vb)
 163 {
 164     const struct Maildir_entry *a = va, *b = vb;
 165     if (a->mtime > b->mtime)
 166       return 1;
 167     else if (a->mtime < b->mtime)
 168       return -1;
 169     else
 170       return 0;
 171 }
 172
 173 int
 174 main (int argc, char **argv)
 175 {
 176     int chgflag = 1, trnflag = 1;
 177     int noisy = 1, width = 0;
 178     int hghnum = 0, msgnum = 0;
 179     int sasl = 0;
 180     int incerr = 0; /* <0 if inc hits an error which means it should not truncate mailspool */
 181     char *cp, *maildir = NULL, *folder = NULL;
 182     char *format = NULL, *form = NULL;
 183     char *host = NULL, *port = NULL, *user = NULL, *proxy = NULL;
 184     char *audfile = NULL, *from = NULL, *saslmech = NULL;
 185     char buf[BUFSIZ], **argp, *nfs, **arguments;
 186     struct msgs *mp = NULL;
 187     struct stat st, s1;
 188     FILE *aud = NULL;
 189     char b[PATH_MAX + 1];
 190     char *maildir_copy = NULL;  /* copy of mail directory because the static gets overwritten */
 191
 192     int nmsgs, nbytes;
 193     char *pass = NULL;
 194     char *MAILHOST_env_variable;
 195
 196     done=inc_done;
 197
 198 /* absolutely the first thing we do is save our privileges,
 199  * and drop them if we can.
 200  */
 201     SAVEGROUPPRIVS();
 202     TRYDROPGROUPPRIVS();
 203
 204 #ifdef LOCALE
 205     setlocale(LC_ALL, "");
 206 #endif
 207     invo_name = r1bindex (argv[0], '/');
 208
 209     /* read user profile/context */
 210     context_read();
 211
 212     mts_init (invo_name);
 213     arguments = getarguments (invo_name, argc, argv, 1);
 214     argp = arguments;
 215
 216     /*
 217      * Scheme is:
 218      *        use MAILHOST environment variable if present,
 219      *  else try Hesiod.
 220      *  If that fails, use the default (if any)
 221      *  provided by mts.conf in mts_init()
 222      */
 223     if ((MAILHOST_env_variable = getenv("MAILHOST")) != NULL)
 224         pophost = MAILHOST_env_variable;
 225     /*
 226      * If there is a valid "pophost" entry in mts.conf,
 227      * then use it as the default host.
 228      */
 229     if (pophost && *pophost)
 230         host = pophost;
 231
 232     while ((cp = *argp++)) {
 233         if (*cp == '-') {
 234             switch (smatch (++cp, switches)) {
 235             case AMBIGSW:
 236                 ambigsw (cp, switches);
 237                 done (1);
 238             case UNKWNSW:
 239                 adios (NULL, "-%s unknown", cp);
 240
 241             case HELPSW:
 242                 snprintf (buf, sizeof(buf), "%s [+folder] [switches]", invo_name);
 243                 print_help (buf, switches, 1);
 244                 done (0);
 245             case VERSIONSW:
 246                 print_version(invo_name);
 247                 done (0);
 248
 249             case AUDSW:
 250                 if (!(cp = *argp++) || *cp == '-')
 251                     adios (NULL, "missing argument to %s", argp[-2]);
 252                 audfile = getcpy (m_maildir (cp));
 253                 continue;
 254             case NAUDSW:
 255                 audfile = NULL;
 256                 continue;
 257
 258             case CHGSW:
 259                 chgflag++;
 260                 continue;
 261             case NCHGSW:
 262                 chgflag = 0;
 263                 continue;
 264
 265             /*
 266              * The flag `trnflag' has the value:
 267              *
 268              * 2 if -truncate is given
 269              * 1 by default (truncating is default)
 270              * 0 if -notruncate is given
 271              */
 272             case TRNCSW:
 273                 trnflag = 2;
 274                 continue;
 275             case NTRNCSW:
 276                 trnflag = 0;
 277                 continue;
 278
 279             case FILESW:
 280                 if (!(cp = *argp++) || *cp == '-')
 281                     adios (NULL, "missing argument to %s", argp[-2]);
 282                 from = path (cp, TFILE);
 283
 284                 /*
 285                  * If the truncate file is in default state,
 286                  * change to not truncate.
 287                  */
 288                 if (trnflag == 1)
 289                     trnflag = 0;
 290                 continue;
 291
 292             case SILSW:
 293                 noisy = 0;
 294                 continue;
 295             case NSILSW:
 296                 noisy++;
 297                 continue;
 298
 299             case FORMSW:
 300                 if (!(form = *argp++) || *form == '-')
 301                     adios (NULL, "missing argument to %s", argp[-2]);
 302                 format = NULL;
 303                 continue;
 304             case FMTSW:
 305                 if (!(format = *argp++) || *format == '-')
 306                     adios (NULL, "missing argument to %s", argp[-2]);
 307                 form = NULL;
 308                 continue;
 309
 310             case WIDTHSW:
 311                 if (!(cp = *argp++) || *cp == '-')
 312                     adios (NULL, "missing argument to %s", argp[-2]);
 313                 width = atoi (cp);
 314                 continue;
 315
 316             case HOSTSW:
 317                 if (!(host = *argp++) || *host == '-')
 318                     adios (NULL, "missing argument to %s", argp[-2]);
 319                 continue;
 320
 321             case PORTSW:
 322                 if (!(port = *argp++) || *port == '-')
 323                     adios (NULL, "missing argument to %s", argp[-2]);
 324                 continue;
 325
 326             case USERSW:
 327                 if (!(user = *argp++) || *user == '-')
 328                     adios (NULL, "missing argument to %s", argp[-2]);
 329                 continue;
 330
 331             case PACKSW:
 332                 if (!(packfile = *argp++) || *packfile == '-')
 333                     adios (NULL, "missing argument to %s", argp[-2]);
 334                 continue;
 335             case NPACKSW:
 336                 packfile = NULL;
 337                 continue;
 338
 339             case SNOOPSW:
 340                 snoop++;
 341                 continue;
 342
 343             case SASLSW:
 344                 sasl++;
 345                 continue;
 346             case NOSASLSW:
 347                 sasl = 0;
 348                 continue;
 349
 350             case SASLMECHSW:
 351                 if (!(saslmech = *argp++) || *saslmech == '-')
 352                     adios (NULL, "missing argument to %s", argp[-2]);
 353                 continue;
 354             case PROXYSW:
 355                 if (!(proxy = *argp++) || *proxy == '-')
 356                     adios (NULL, "missing argument to %s", argp[-2]);
 357                 continue;
 358             }
 359         }
 360         if (*cp == '+' || *cp == '@') {
 361             if (folder)
 362                 adios (NULL, "only one folder at a time!");
 363             else
 364                 folder = pluspath (cp);
 365         } else {
 366             adios (NULL, "usage: %s [+folder] [switches]", invo_name);
 367         }
 368     }
 369
 370     /* NOTE: above this point you should use TRYDROPGROUPPRIVS(),
 371      * not DROPGROUPPRIVS().
 372      */
 373     if (host && !*host)
 374         host = NULL;
 375
 376     /* guarantee dropping group priveleges; we might not have done so earlier */
 377     DROPGROUPPRIVS();
 378
 379     /*
 380      * Where are we getting the new mail?
 381      */
 382     if (from)
 383         inc_type = INC_FILE;
 384     else if (host)
 385         inc_type = INC_POP;
 386     else
 387         inc_type = INC_FILE;
 388
 389     /*
 390      * Are we getting the mail from
 391      * a POP server?
 392      */
 393     if (inc_type == INC_POP) {
 394         if (user == NULL)
 395             user = getusername ();
 396         if (sasl)
 397             pass = getusername ();
 398         else
 399             ruserpass (host, &user, &pass);
 400
 401         /*
 402          * initialize POP connection
 403          */
 404         if (pop_init (host, port, user, pass, proxy, snoop, sasl,
 405                       saslmech) == NOTOK)
 406             adios (NULL, "%s", response);
 407
 408         /* Check if there are any messages */
 409         if (pop_stat (&nmsgs, &nbytes) == NOTOK)
 410             adios (NULL, "%s", response);
 411
 412         if (nmsgs == 0) {
 413             pop_quit();
 414             adios (NULL, "no mail to incorporate");
 415         }
 416     }
 417
 418     /*
 419      * We will get the mail from a file
 420      * (typically the standard maildrop)
 421      */
 422
 423     if (inc_type == INC_FILE) {
 424         if (from)
 425             newmail = from;
 426         else if ((newmail = getenv ("MAILDROP")) && *newmail)
 427             newmail = m_mailpath (newmail);
 428         else if ((newmail = context_find ("maildrop")) && *newmail)
 429             newmail = m_mailpath (newmail);
 430         else {
 431             newmail = concat (MAILDIR, "/", MAILFIL, NULL);
 432         }
 433         if (stat (newmail, &s1) == NOTOK || s1.st_size == 0)
 434             adios (NULL, "no mail to incorporate");
 435         if (s1.st_mode & S_IFDIR) {
 436             DIR *md;
 437             struct dirent *de;
 438             struct stat ms;
 439             int i;
 440             i = 0;
 441             cp = concat (newmail, "/new", NULL);
 442             if ((md = opendir(cp)) == NULL)
 443                 adios (NULL, "unable to open %s", cp);
 444             while ((de = readdir (md)) != NULL) {
 445                 if (de->d_name[0] == '.')
 446                     continue;
 447                 if (i >= num_maildir_entries) {
 448                     if ((Maildir = realloc(Maildir, sizeof(*Maildir) * (2*i+16))) == NULL)
 449                         adios(NULL, "not enough memory for %d messages", 2*i+16);
 450                     num_maildir_entries = 2*i+16;
 451                 }
 452                 Maildir[i].filename = concat (cp, "/", de->d_name, NULL);
 453                 if (stat(Maildir[i].filename, &ms) != 0)
 454                    adios (Maildir[i].filename, "couldn't get delivery time");
 455                 Maildir[i].mtime = ms.st_mtime;
 456                 i++;
 457             }
 458             free (cp);
 459             closedir (md);
 460             cp = concat (newmail, "/cur", NULL);
 461             if ((md = opendir(cp)) == NULL)
 462                 adios (NULL, "unable to open %s", cp);
 463             while ((de = readdir (md)) != NULL) {
 464                 if (de->d_name[0] == '.')
 465                     continue;
 466                 if (i >= num_maildir_entries) {
 467                     if ((Maildir = realloc(Maildir, sizeof(*Maildir) * (2*i+16))) == NULL)
 468                         adios(NULL, "not enough memory for %d messages", 2*i+16);
 469                     num_maildir_entries = 2*i+16;
 470                 }
 471                 Maildir[i].filename = concat (cp, "/", de->d_name, NULL);
 472                 if (stat(Maildir[i].filename, &ms) != 0)
 473                    adios (Maildir[i].filename, "couldn't get delivery time");
 474                 Maildir[i].mtime = ms.st_mtime;
 475                 i++;
 476             }
 477             free (cp);
 478             closedir (md);
 479             if (i == 0)
 480                 adios (NULL, "no mail to incorporate");
 481             num_maildir_entries = i;
 482             qsort (Maildir, num_maildir_entries, sizeof(*Maildir), maildir_srt);
 483         }
 484
 485         if ((cp = strdup(newmail)) == (char *)0)
 486             adios (NULL, "error allocating memory to copy newmail");
 487
 488         newmail = cp;
 489     }
 490
 491     /* skip the folder setup */
 492     if ((inc_type == INC_POP) && packfile)
 493         goto go_to_it;
 494
 495     if (!context_find ("path"))
 496         free (path ("./", TFOLDER));
 497     if (!folder)
 498         folder = getfolder (0);
 499     maildir = m_maildir (folder);
 500
 501     if ((maildir_copy = strdup(maildir)) == (char *)0)
 502         adios (maildir, "error allocating memory to copy maildir");
 503
 504     if (!folder_exists(maildir)) {
 505         /* If the folder doesn't exist, and we're given the -silent flag,
 506          * just fail.
 507          */
 508         if (noisy)
 509             create_folder(maildir, 0, done);
 510         else
 511             done (1);
 512     }
 513
 514     if (chdir (maildir) == NOTOK)
 515         adios (maildir, "unable to change directory to");
 516
 517     /* read folder and create message structure */
 518     if (!(mp = folder_read (folder, 0)))
 519         adios (NULL, "unable to read folder %s", folder);
 520
 521 go_to_it:
 522
 523     if (inc_type == INC_FILE && Maildir == NULL) {
 524         if (access (newmail, W_OK) != NOTOK) {
 525             locked++;
 526             if (trnflag) {
 527                 SIGNAL (SIGHUP, SIG_IGN);
 528                 SIGNAL (SIGINT, SIG_IGN);
 529                 SIGNAL (SIGQUIT, SIG_IGN);
 530                 SIGNAL (SIGTERM, SIG_IGN);
 531             }
 532
 533             GETGROUPPRIVS();       /* Reset gid to lock mail file */
 534             in = lkfopenspool (newmail, "r");
 535             DROPGROUPPRIVS();
 536             if (in == NULL)
 537                 adios (NULL, "unable to lock and fopen %s", newmail);
 538             fstat (fileno(in), &s1);
 539         } else {
 540             trnflag = 0;
 541             if ((in = fopen (newmail, "r")) == NULL)
 542                 adios (newmail, "unable to read");
 543         }
 544     }
 545
 546     /* This shouldn't be necessary but it can't hurt. */
 547     DROPGROUPPRIVS();
 548
 549     if (audfile) {
 550         int i;
 551         if ((i = stat (audfile, &st)) == NOTOK)
 552             advise (NULL, "Creating Receive-Audit: %s", audfile);
 553         if ((aud = fopen (audfile, "a")) == NULL)
 554             adios (audfile, "unable to append to");
 555         else if (i == NOTOK)
 556             chmod (audfile, m_gmprot ());
 557
 558         fprintf (aud, from ? "<<inc>> %s -ms %s\n"
 559                  : host ? "<<inc>> %s -host %s -user %s\n"
 560                  : "<<inc>> %s\n",
 561                  dtimenow (0), from ? from : host, user);
 562     }
 563
 564     /* Get new format string */
 565     nfs = new_fs (form, format, FORMAT);
 566
 567     if (noisy) {
 568         printf ("Incorporating new mail into %s...\n\n", folder);
 569         fflush (stdout);
 570     }
 571
 572
 573     /*
 574      * Get the mail from a POP server
 575      */
 576     if (inc_type == INC_POP) {
 577         int i;
 578         if (packfile) {
 579             packfile = path (packfile, TFILE);
 580             if (stat (packfile, &st) == NOTOK) {
 581                 if (errno != ENOENT)
 582                     adios (packfile, "error on file");
 583                 cp = concat ("Create file \"", packfile, "\"? ", NULL);
 584                 if (noisy && !getanswer (cp))
 585                     done (1);
 586                 free (cp);
 587             }
 588             msgnum = map_count ();
 589             if ((pd = mbx_open (packfile, mbx_style, getuid(), getgid(), m_gmprot()))
 590                 == NOTOK)
 591                 adios (packfile, "unable to open");
 592             if ((pf = fdopen (pd, "w+")) == NULL)
 593                 adios (NULL, "unable to fdopen %s", packfile);
 594         } else {
 595             hghnum = msgnum = mp->hghmsg;
 596         }
 597
 598         for (i = 1; i <= nmsgs; i++) {
 599             msgnum++;
 600             if (packfile) {
 601                 fseek (pf, 0L, SEEK_CUR);
 602                 pos = ftell (pf);
 603                 size = 0;
 604                 fwrite (mmdlm1, 1, strlen (mmdlm1), pf);
 605                 start = ftell (pf);
 606
 607                 if (pop_retr (i, pop_pack) == NOTOK)
 608                     adios (NULL, "%s", response);
 609
 610                 fseek (pf, 0L, SEEK_CUR);
 611                 stop = ftell (pf);
 612                 if (fflush (pf))
 613                     adios (packfile, "write error on");
 614                 fseek (pf, start, SEEK_SET);
 615             } else {
 616                 cp = getcpy (m_name (msgnum));
 617                 if ((pf = fopen (cp, "w+")) == NULL)
 618                     adios (cp, "unable to write");
 619                 chmod (cp, m_gmprot ());
 620                 start = stop = 0L;
 621
 622                 if (pop_retr (i, pop_action) == NOTOK)
 623                     adios (NULL, "%s", response);
 624
 625                 if (fflush (pf))
 626                     adios (cp, "write error on");
 627                 fseek (pf, 0L, SEEK_SET);
 628             }
 629             switch (incerr = scan (pf, msgnum, 0, nfs, width,
 630                               packfile ? 0 : msgnum == mp->hghmsg + 1 && chgflag,
 631                               1, NULL, stop - start, noisy)) {
 632             case SCNEOF:
 633                 printf ("%*d  empty\n", DMAXFOLDER, msgnum);
 634                 break;
 635
 636             case SCNFAT:
 637                 trnflag = 0;
 638                 noisy++;
 639                 /* advise (cp, "unable to read"); already advised */
 640                 /* fall thru */
 641
 642             case SCNERR:
 643             case SCNNUM:
 644                 break;
 645
 646             case SCNMSG:
 647             case SCNENC:
 648             default:
 649                 if (aud)
 650                     fputs (scanl, aud);
 651                 if (noisy)
 652                     fflush (stdout);
 653                 break;
 654             }
 655             if (packfile) {
 656                 fseek (pf, stop, SEEK_SET);
 657                 fwrite (mmdlm2, 1, strlen (mmdlm2), pf);
 658                 if (fflush (pf) || ferror (pf)) {
 659                     int e = errno;
 660                     pop_quit ();
 661                     errno = e;
 662                     adios (packfile, "write error on");
 663                 }
 664                 map_write (packfile, pd, 0, 0L, start, stop, pos, size, noisy);
 665             } else {
 666                 if (ferror(pf) || fclose (pf)) {
 667                     int e = errno;
 668                     unlink (cp);
 669                     pop_quit ();
 670                     errno = e;
 671                     adios (cp, "write error on");
 672                 }
 673                 free (cp);
 674             }
 675
 676             if (trnflag && pop_dele (i) == NOTOK)
 677                 adios (NULL, "%s", response);
 678         }
 679
 680         if (pop_quit () == NOTOK)
 681             adios (NULL, "%s", response);
 682         if (packfile) {
 683             mbx_close (packfile, pd);
 684             pd = NOTOK;
 685         }
 686     }
 687
 688     /*
 689      * Get the mail from file (usually mail spool)
 690      */
 691     if (inc_type == INC_FILE && Maildir == NULL) {
 692         scan_detect_mbox_style (in);            /* the MAGIC invocation... */
 693         hghnum = msgnum = mp->hghmsg;
 694         for (;;) {
 695             /* create scanline for new message */
 696             switch (incerr = scan (in, msgnum + 1, msgnum + 1, nfs, width,
 697                               msgnum == hghnum && chgflag, 1, NULL, 0L, noisy)) {
 698             case SCNFAT:
 699             case SCNEOF:
 700                 break;
 701
 702             case SCNERR:
 703                 if (aud)
 704                     fputs ("inc aborted!\n", aud);
 705                 advise (NULL, "aborted!");      /* doesn't clean up locks! */
 706                 break;
 707
 708             case SCNNUM:
 709                 advise (NULL, "BUG in %s, number out of range", invo_name);
 710                 break;
 711
 712             default:
 713                 advise (NULL, "BUG in %s, scan() botch (%d)", invo_name, incerr);
 714                 break;
 715
 716             case SCNMSG:
 717             case SCNENC:
 718                 /*
 719                  *  Run the external program hook on the message.
 720                  */
 721
 722                 (void)snprintf(b, sizeof (b), "%s/%d", maildir_copy, msgnum + 1);
 723                 (void)ext_hook("add-hook", b, (char *)0);
 724
 725                 if (aud)
 726                     fputs (scanl, aud);
 727                 if (noisy)
 728                     fflush (stdout);
 729
 730                 msgnum++;
 731                 continue;
 732             }
 733             /* If we get here there was some sort of error from scan(),
 734              * so stop processing anything more from the spool.
 735              */
 736             break;
 737         }
 738     } else if (inc_type == INC_FILE) { /* Maildir inbox to process */
 739         char *sp;
 740         FILE *sf;
 741         int i;
 742
 743         hghnum = msgnum = mp->hghmsg;
 744         for (i = 0; i < num_maildir_entries; i++) {
 745             msgnum++;
 746
 747             sp = Maildir[i].filename;
 748             cp = getcpy (m_name (msgnum));
 749             pf = NULL;
 750             if (!trnflag || link(sp, cp) == -1) {
 751                 static char buf[65536];
 752                 size_t nrd;
 753
 754                 if ((sf = fopen (sp, "r")) == NULL)
 755                     adios (sp, "unable to read for copy");
 756                 if ((pf = fopen (cp, "w+")) == NULL)
 757                     adios (cp, "unable to write for copy");
 758                 while ((nrd = fread(buf, 1, sizeof(buf), sf)) > 0)
 759                     if (fwrite(buf, 1, nrd, pf) != nrd)
 760                         break;
 761                 if (ferror(sf) || fflush(pf) || ferror(pf)) {
 762                         int e = errno;
 763                         fclose(pf); fclose(sf); unlink(cp);
 764                         errno = e;
 765                         adios(cp, "copy error %s -> %s", sp, cp);
 766                 }
 767                 fclose (sf);
 768                 sf = NULL;
 769             }
 770             if (pf == NULL && (pf = fopen (cp, "r")) == NULL)
 771                 adios (cp, "not available");
 772             chmod (cp, m_gmprot ());
 773
 774             fseek (pf, 0L, SEEK_SET);
 775             switch (incerr = scan (pf, msgnum, 0, nfs, width,
 776                               msgnum == mp->hghmsg + 1 && chgflag,
 777                               1, NULL, stop - start, noisy)) {
 778             case SCNEOF:
 779                 printf ("%*d  empty\n", DMAXFOLDER, msgnum);
 780                 break;
 781
 782             case SCNFAT:
 783                 trnflag = 0;
 784                 noisy++;
 785                 /* advise (cp, "unable to read"); already advised */
 786                 /* fall thru */
 787
 788             case SCNERR:
 789             case SCNNUM:
 790                 break;
 791
 792             case SCNMSG:
 793             case SCNENC:
 794             default:
 795                 /*
 796                  *  Run the external program hook on the message.
 797                  */
 798
 799                 (void)snprintf(b, sizeof (b), "%s/%d", maildir_copy, msgnum + 1);
 800                 (void)ext_hook("add-hook", b, (char *)0);
 801
 802                 if (aud)
 803                     fputs (scanl, aud);
 804                 if (noisy)
 805                     fflush (stdout);
 806                 break;
 807             }
 808             if (ferror(pf) || fclose (pf)) {
 809                 int e = errno;
 810                 unlink (cp);
 811                 errno = e;
 812                 adios (cp, "write error on");
 813             }
 814             pf = NULL;
 815             free (cp);
 816
 817             if (trnflag && unlink (sp) == NOTOK)
 818                 adios (sp, "couldn't unlink");
 819             free (sp); /* Free Maildir[i]->filename */
 820         }
 821         free (Maildir); /* From now on Maildir is just a flag - don't dref! */
 822     }
 823
 824     scan_finished ();
 825
 826     if (incerr < 0) {           /* error */
 827         if (locked) {
 828             GETGROUPPRIVS();      /* Be sure we can unlock mail file */
 829             (void) lkfclosespool (in, newmail); in = NULL;
 830             DROPGROUPPRIVS();    /* And then return us to normal privileges */
 831         } else {
 832             fclose (in); in = NULL;
 833         }
 834         adios (NULL, "failed");
 835     }
 836
 837     if (aud)
 838         fclose (aud);
 839
 840     if (noisy)
 841         fflush (stdout);
 842
 843     if ((inc_type == INC_POP) && packfile)
 844         done (0);
 845
 846     /*
 847      * truncate file we are incorporating from
 848      */
 849     if (inc_type == INC_FILE && Maildir == NULL) {
 850         if (trnflag) {
 851             if (stat (newmail, &st) != NOTOK && s1.st_mtime != st.st_mtime)
 852                 advise (NULL, "new messages have arrived!\007");
 853             else {
 854                 int newfd;
 855                 if ((newfd = creat (newmail, 0600)) != NOTOK)
 856                     close (newfd);
 857                 else
 858                     admonish (newmail, "error zero'ing");
 859                 unlink(map_name(newmail));
 860             }
 861         } else {
 862             if (noisy)
 863                 printf ("%s not zero'd\n", newmail);
 864         }
 865     }
 866
 867     if (msgnum == hghnum) {
 868         admonish (NULL, "no messages incorporated");
 869     } else {
 870         /*
 871          * Lock the sequence file now, and loop to set the right flags
 872          * in the folder structure
 873          */
 874
 875         struct msgs *mp2;
 876         int i;
 877
 878         context_replace (pfolder, folder);      /* update current folder */
 879
 880         if ((mp2 = folder_read(folder, 1)) == NULL) {
 881             admonish(NULL, "Unable to reread folder %s", folder);
 882             goto skip;
 883         }
 884
 885         /*
 886          * Shouldn't happen, but just in case ...
 887          */
 888
 889         if (msgnum >= mp2->hghoff
 890                 && !(mp2 = folder_realloc (mp2, mp2->lowoff, msgnum + 1))) {
 891             advise (NULL, "unable to reallocate folder storage");
 892             goto skip;
 893         }
 894
 895         if (chgflag)
 896             mp2->curmsg = hghnum + 1;
 897         mp2->hghmsg = msgnum;
 898
 899         if (mp2->lowmsg == 0)
 900             mp2->lowmsg = 1;
 901         if (chgflag)            /* sigh... */
 902             seq_setcur (mp2, mp2->curmsg);
 903
 904         for (i = hghnum + 1; i <= msgnum; i++) {
 905             clear_msg_flags (mp2, i);
 906             set_exists (mp2, i);
 907             set_unseen (mp2, i);
 908         }
 909         mp2->msgflags |= SEQMOD;
 910         seq_setunseen(mp2, 0);  /* Set the Unseen-Sequence */
 911         seq_save(mp2);          /* Save the sequence file */
 912         folder_free(mp2);
 913     }
 914 skip:
 915
 916     /*
 917      * unlock the mail spool
 918      */
 919     if (inc_type == INC_FILE && Maildir == NULL) {
 920         if (locked) {
 921            GETGROUPPRIVS();        /* Be sure we can unlock mail file */
 922            (void) lkfclosespool (in, newmail); in = NULL;
 923            DROPGROUPPRIVS();       /* And then return us to normal privileges */
 924         } else {
 925             fclose (in); in = NULL;
 926         }
 927     }
 928
 929     context_save ();            /* save the context file   */
 930     done (0);
 931     return 1;
 932 }
 933
 934
 935 static void
 936 inc_done (int status)
 937 {
 938     if (packfile && pd != NOTOK)
 939         mbx_close (packfile, pd);
 940     if (locked)
 941     {
 942         GETGROUPPRIVS();
 943         lkfclosespool(in, newmail);
 944         DROPGROUPPRIVS();
 945     }
 946     exit (status);
 947 }
 948
 949 static int
 950 pop_action (char *s)
 951 {
 952     fprintf (pf, "%s\n", s);
 953     stop += strlen (s) + 1;
 954     return 0;  /* Is return value used?  This was missing before 1999-07-15. */
 955 }
 956
 957 static int
 958 pop_pack (char *s)
 959 {
 960     int j;
 961     char buffer[BUFSIZ];
 962
 963     snprintf (buffer, sizeof(buffer), "%s\n", s);
 964     for (j = 0; (j = stringdex (mmdlm1, buffer)) >= 0; buffer[j]++)
 965         continue;
 966     for (j = 0; (j = stringdex (mmdlm2, buffer)) >= 0; buffer[j]++)
 967         continue;
 968     fputs (buffer, pf);
 969     size += strlen (buffer) + 1;
 970     return 0;  /* Is return value used?  This was missing before 1999-07-15. */
 971 }
 972
 973 static int
 974 map_count (void)
 975 {
 976     int md;
 977     char *cp;
 978     struct drop d;
 979     struct stat st;
 980
 981     if (stat (packfile, &st) == NOTOK)
 982         return 0;
 983     if ((md = open (cp = map_name (packfile), O_RDONLY)) == NOTOK
 984             || map_chk (cp, md, &d, (long) st.st_size, 1)) {
 985         if (md != NOTOK)
 986             close (md);
 987         return 0;
 988     }
 989     close (md);
 990     return (d.d_id);
 991 }