A.P. Lawrence

Recent SCO/Linux News

From: RadleyRobot <RadleyRobot@jpr.com>
Subject: SCO Technical Articles released on 20010407
Date: Sat, 7 Apr 2001 17:32:35 GMT

The following problems are addressed in Technical Articles that appeared
on SCO's web site in the week ending 20010407.

Each problem is preceded by the URL reference to get the relevant article
from the WAIS database at caldera.com.

        http://www.caldera.com/cgi-bin/ssl_reference?104596
        created 07 Jul 1994
        revised 05 Apr 2001
PROBLEM:  I wish to configure MMDF so as to prevent other organizations' mail
          from being routed via my system, for example:

            Z.fu.com       X.bar.com
                ^               ^
                |               |
                v               v
                 "A.internal.com"
                  (Mail Gateway)
                        ^
                        |
                        v
                "B.internal.com",
                "C.internal.com",
                      ...

          I want to allow my systems to both send and receive mail from
          external systems (such as Z.fu.com or X.bar.com), but prevent
          external systems from routing mail to each other via my gateway
          (such as Z.fu.com to X.fu.com via A.internal.com).

====    ====    ====    ====    ====    ====    ====    ====    ====    ====

Control Spam and Viruses

Run your own mailserver

        http://www.caldera.com/cgi-bin/ssl_reference?109982
        created 22 Feb 1999
        revised 04 Apr 2001
PROBLEM:  When I use the network configuration manager (or netcfg) to increase
          pseudo-ttys, the number of regular pseudo-ttys (/dev/pts### devices)
          is always set to 256, the number of SCO pseudo-tty devices
          (/dev/ttyp## and /dev/ptyp## devices) is set to the specified value.

          OR:

          The online documentation for increasing the number of pseudo-terminal
          devices is incomplete.

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        http://www.caldera.com/cgi-bin/ssl_reference?111402
        created 07 Sep 2000
        revised 02 Apr 2001
PROBLEM:  What is Support Level Supplement (SLS) ptf7666c, the UnixWare 7.1.1
          TCP/IP, IO and various fixes Supplement?

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        http://www.caldera.com/cgi-bin/ssl_reference?112421
        created 06 Feb 2001
        revised 06 Apr 2001
PROBLEM:  I just received a notice saying my UnixWare 7.x.x Mail Server is
          an open relay and has been listed in the ORBS database at:

              http://www.orbs.org

          ORBS (the Open Relay Behavior-modification System) is a
          database for tracking SMTP servers that have been confirmed
          to permit third-party relay. If I run the Relay test available
          at http://www.abuse.net/relay.html (requires registration) my
          server fails on "Relay Test 8".

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        http://www.caldera.com/cgi-bin/ssl_reference?112681
        created 23 Feb 2001
        revised 05 Apr 2001
PROBLEM:  The version of rtpm shipped with UnixWare 7 Release 7.1.1 is 
          vulnerable to buffer overflows in user input. These overflows 
          could lead to a local system compromise. 

====    ====    ====    ====    ====    ====    ====    ====    ====    ====

        http://www.caldera.com/cgi-bin/ssl_reference?113061
        created 16 Mar 2001
        revised 03 Apr 2001
PROBLEM:  With previous versions of OpenServer the "routed" daemon would start
          by default.  With OpenServer 5.0.6 this does not happen.

====    ====    ====    ====    ====    ====    ====    ====    ====    ====

        http://www.caldera.com/cgi-bin/ssl_reference?113121
        created 20 Mar 2001
        revised 02 Apr 2001
PROBLEM:  My server has panicked with the following messages:

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        http://www.caldera.com/cgi-bin/ssl_reference?113122
        created 20 Mar 2001
        revised 02 Apr 2001
PROBLEM:  Files remain locked after closing on NFS mounted filesystems from
          UnixWare 7.  The following is "example" source that exhibits the
          problem;

#include <stdio.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <errno.h>               /* errno */

int main()

{

   int f, g;
   struct flock fl;
   struct stat info;
   char buf[8];

   f = open("zot", O_RDWR, (S_IREAD | S_IWRITE));
   if (f < 0) {
      printf("first open failed!\n");
      goto abortend;
   }

   /* initialize the lock structure */
   fl.l_type = F_WRLCK;       /* lock mode */
   fl.l_whence = 1;           /* start at current file position */
   fl.l_start = 0;            /* start at current file position */
   fl.l_len = 0;              /* the whole file */

   /* lock the entire file */
   if (fcntl(f, F_SETLK, &fl) < 0) {    /* error? */
      printf("First lock failed!\n");
      if ((errno == EACCES)  ||  (errno == EAGAIN)) { /* already locked? */
         printf("file already locked!\n");
         goto abortend;
      }
   }

   g = open("zot", O_RDONLY, (S_IREAD | S_IWRITE));
   if (g < 0) {
      printf("second open failed!\n");
      goto abortend;
   }

   /* initialize the lock structure */
   fl.l_type = F_RDLCK;       /* lock mode */
   fl.l_whence = 1;           /* start at current file position */
   fl.l_start = 0;            /* start at current file position */
   fl.l_len = 1;              /* one byte */

   /* attempt to lock the bytes without waiting */
   if (fcntl(g, F_SETLK, &fl) < 0) {     /* error? */
      printf("read lock failed!\n");
      if ((errno == EACCES)  ||  (errno == EAGAIN)) { /* already locked? */
         printf("file already locked!\n");
      }
      goto abortend;
   }

   read(g, buf, 1);
   printf("buf = %c\n", buf[0]);
   lseek(g, (long) 0, SEEK_SET);

   /* initialize the lock structure */
   fl.l_type = F_UNLCK;       /* lock mode */
   fl.l_whence = 1;           /* start at current file position */
   fl.l_start = 0;            /* start at current file position */
   fl.l_len = 1;              /* one byte */

   /* attempt to unlock the bytes without waiting */
   if (fcntl(g, F_SETLK, &fl) < 0) {     /* error? */
      printf("read unlock failed!\n");
      goto abortend;
   }

#ifdef workaround
   /* initialize the lock structure */
   fl.l_type = F_UNLCK;       /* lock mode */
   fl.l_whence = 1;           /* start at current file position */
   fl.l_start = 0;            /* start at current file position */
   fl.l_len = 0;              /* whole file */

   /* attempt to unlock the bytes without waiting */
   lseek(f, (long) 0, SEEK_SET);
   if (fcntl(f, F_SETLK, &fl) < 0) {     /* error? */
      printf("read unlock failed!\n");
      goto abortend;
   }
#endif

   close(g);

   close(f);

abortend:

   return (0);

}

Unix and Linux Support

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        http://www.caldera.com/cgi-bin/ssl_reference?113141
        created 21 Mar 2001
        revised 02 Apr 2001
PROBLEM:  Running "ap -r" on multiple users sets wrong permissions on
          /etc/passwd and /etc/group.

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        http://www.caldera.com/cgi-bin/ssl_reference?113142
        created 21 Mar 2001
        revised 02 Apr 2001
PROBLEM:  Disk and swap space usage figures reported by snmp (e.g.
          by the command "getmany localhost public hrStorage") may
          be negative or otherwise incorrect.

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        http://www.caldera.com/cgi-bin/ssl_reference?113221
        created 28 Mar 2001
        revised 03 Apr 2001
PROBLEM:  "/sbin/emergency_rec -e tape_drive" fails to open /dev/rdsk/p0 on a
          Compaq server with an IDA RAID Controller.

====    ====    ====    ====    ====    ====    ====    ====    ====    ====

        http://www.caldera.com/cgi-bin/ssl_reference?113222
        created 28 Mar 2001
        revised 02 Apr 2001
PROBLEM:  I have installed Tarantella Enterprise 3 on my UnixWare 7.1.1 server
          but I cannot connect to the URL http://<my_server>/tarantella

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        http://www.caldera.com/cgi-bin/ssl_reference?113223
        created 28 Mar 2001
        revised 02 Apr 2001
PROBLEM:  "/sbin/emergency_rec -e tape_drive" fails to open /dev/rdsk/p0 on a
          Compaq server with an IDA RAID Controller.

====    ====    ====    ====    ====    ====    ====    ====    ====    ====

        http://www.caldera.com/cgi-bin/ssl_reference?113261
        created 29 Mar 2001
        revised 02 Apr 2001
PROBLEM:  After I install Tarantella Enterprise II any files I had in the /tmp
          directory starting with "inst" are removed.

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        http://www.caldera.com/cgi-bin/ssl_reference?113281
        created 30 Mar 2001
        revised 03 Apr 2001
PROBLEM:  When an "fsck -d -ofull" is performed on a non-root filesystem,
          the fsck hangs and at the point it runs Phase 5 Checking
          Synchronous Log.

====    ====    ====    ====    ====    ====    ====    ====    ====    ====

        http://www.caldera.com/cgi-bin/ssl_reference?113282
        created 30 Mar 2001
        revised 02 Apr 2001
PROBLEM:  My proxy server has been configured to reject IP Addresses but allows
          DNS Names.

          This prevents my Tarantella Array to provide me a server in the array
          to log into.

====    ====    ====    ====    ====    ====    ====    ====    ====    ====

        http://www.caldera.com/cgi-bin/ssl_reference?113321
        created 03 Apr 2001
        revised 04 Apr 2001
PROBLEM:  I have installed my UnixWare 7 system with a genuine license but when
         I log into the system I get the message:

          NOTICE: Licensed for a limited product evaluation period only.

          If I run the License Manager, it indicates that the status of the
          license is:

          Valid until 10/21/2026

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