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