Patch Name:  PHCO_2767

Patch Description: Change system(3C) to call vfork(2) instead of fork(2)

        ***************************************************************
        * THIS IS A SITE-SPECIFIC PATCH, NOT FOR GENERAL DISTRIBUTION *
        ***************************************************************

        This patch is intended for distribution to customers using specific
        Parametric Technology Corporation software on HP-UX 9.01.

        This patch is fully supported for Parametric Technology
        Corporation customers. Use of this patch for other customers
        will not be supported by Hewlett-Packard.

        The system(3C) function in libc is changed to pre-9.01 behavior.
        This allows specific Parametric Technology Corporation software
        to execute without unneccesary swap space being allocated.

        This change also modifies the signal handling of SIGCHLD and thus
        violates IEEE1003.2 (POSIX.2) and X/Open XPG4 conformance for
        system(3C).

Path Name:  /hp-ux_patches/s700/9.X/PHCO_2767

Effective Date:  930623

Patch Files:  /lib/libc.a /lib/libc.sl

SR/APR#:  5003-134965

"what" string/timestamp:  
/lib/libc.a:
         PHCO_2767 PATCH/9_0 $Revision: 72.26.1.11 $
         system.o PATCH/9_0 $Revision: 64.4 $
/lib/libc.sl:
         PHCO_2767 PATCH/9_0 $Revision: 72.26.1.11 $
         system.o PATCH/9_0 $Revision: 64.4 $

"sum" output:  
52068 3262 /lib/libc.a
35188 2232 /lib/libc.sl

Dependencies:  This patch should be distributed to PTC customers ONLY.

Supersedes:  None.

Patch Package Size:  2847 Kbytes

Installation Instructions:  

     Please review all instructions and the Hewlett-Packard
     SupportLine User Guide or your Hewlett-Packard support terms
     and conditions for precautions, scope of license,
     restrictions, and, limitation of liability and warranties,
     before installing this patch.

     Note: Please back up your system before you patch.

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After getting the patch onto your machine, unshar the patch (sh PHCO_2767).

To install this patch do the following:
1) Run /etc/update (Note: you must be logged in as root to update
   a system).
2) Once in the update "Main Menu" move the highlighted line to "Change
   Source or Destination ->" and press "Return" or "Select Item".
3) Make sure the highlighted item in the "Change Source or Destination"
   window is "From Tape Device to Local System ...", then press "Return" or
   "Select Item".
4) You should now be in the "From Tape Device to Local System" window.
   Change the "Source:  /dev/rmt/0m" to "Source: /tmp/PHCO_2767.updt"
   (this assumes that you are in the /tmp directory where PHCO_2767.updt
   has been placed).  Note: You must enter the complete path name.
5) Press "Done".
6) From here on follow the standard directions for update.

The customized script that update runs will move the original software
to /system/PHCO_2767/orig.  HP recommends keeping this software there in
order to recover from any potential problems.  It is also recommended that
you move the PHCO_2767.text file to /system/PHCO_2767 to be retained for
future reference.

If you wish to put this patch on a magnetic tape and update from the tape
drive, dd a copy of the patch to the tape drive.  As an example the
following will create a copy of the patch that update can read:

        dd if=PHCO_2767.updt of=/dev/rmt/0m bs=2048