This patch replaces the following patches:

291, 782, 1084

This patch has no known incompatiblities with other patches.

This patch fixes the following bugs:

250515 - libabi async I/O can deadlock
254719 - AIO problem with aio_suspend
254955 - TAKE - More AIO fixes
256769 - if aio_hold is called before aio_sgi_init library segv's
259744 - aio.h header file has broken defines for C++
297989 - aio crash
336783 - aio_suspend crashes application

1. Patch SG0001191 Release Note

       This release note describes patch SG0001191 to IRIX 5.3 and
       IRIX 5.3 with XFS

       This patch contains bug fixes for  All platforms.

       This patch contains bug fixes for IRIX 5.3 and IRIX 5.3 with
       XFS. The software cannot be installed on other
       configurations.

       This patch contains fixes for the following bugs in IRIX 5.3
       and IRIX 5.3 with XFS. Bug numbers from Silicon Graphics bug
       tracking system are included for reference.

          o Bug 254719: libabi dies in assert when using
            aio_suspend and some other aio_* calls.

          o Bug 256769: calling aio_hold could cause a segv in
            libabi.

          o Bug 250515: libabi versions of aio_* routines could
            cause user programs to deadlock.

          o Bug 254955: using multiple sprocs with the libabi aio_*
            functions could cause user program deadlocks.

          o Bug 297989: It was possible for a users signal handler
            to be called that would not be appropriate for an AIO
            thread. Now user handlers are cleared from the AIO
            threads.

          o Bug 331159: use of aio_suspend with short timeouts
            could cause a race that would corrupt the shared memory
            arena used by AIO and cause a program to receive a
            SIGSEGV.

          o Bug 336783: aio_suspend would cause the program to exit
            if it could not get certain resources. Now it returns
            EAGAIN instead.

       This patch release includes these subsystems:

          o patchSG0001191.eoe1_sw.irix_lib

       This patch is a patch only to the runtime for programs using
       libabi. In order to develop programs that use the libabi
       version of AIO you will also need the patch to dev.hdr.lib
       that corrects the following problems in /usr/include/aio.h

          o BUG 259744

          o BUG 254955

       Because you want to install only the patches for problems
       you have encountered, patch software is not installed by
       default. After reading the descriptions of the bugs fixed in
       this patch (see Section 1.3), determine the patches that
       meet your specific needs.

       If, after reading Sections 1.1 and 1.2 of these release
       notes, you are unsure whether your hardware and software
       meet the requirements for installing a particular patch, run
       inst.

       Patch software is installed like any other Silicon Graphics
       software product.  Follow the instructions in your Software
       Installation Administrator's Guide to bring up the miniroot
       form of the software installation tools.

       Follow these steps to select a patch for installation:

         1.  At the Inst&gtprompt, type

             install patchSGxxxxxxx

             where xxxxxxx is the patch number.

         2.  Select the desired patches for installation.

         3.  Initiate the installation sequence. Type

             Inst> go

         4.  You may find that two patches have been marked as
             incompatible.  If this occurs, you must deselect one


             of the patches.

             Inst> keep patchSGxxxxxxx

             where xxxxxxx is the patch number.

         5.  After completing the installation process, exit the
             inst program by typing

             Inst> quit

       To remove a patch, use the versions remove command as you
       would for any other software subsystem.  The removal process
       reinstates the original version of software unless you have
       specifically removed the patch history from your system.

       versions remove patchSGxxxxxxx

       where xxxxxxx is the patch number.

       To keep a patch but increase your disk space, use the
       versions removehist command to remove the patch history.

       versions removehist patchSGxxxxxxx

       where xxxxxxx is the patch number.

No Requirements Information Available.

These checksums help to provide a 'signature' for the patch inst image which can be used to authenticate other inst images. You can obtain this kind of output by running sum -r on the image (from the command line):

57130      2   patchSG0001191
04523     58   patchSG0001191.eoe1_sw
11748      1   patchSG0001191.idb

The following lists the files which get installed from each subsystem in the patch:

patchSG0001191.eoe1_sw.irix_lib

usr/lib/libabi.so
usr/relnotes/patchSG0001191/TC
usr/relnotes/patchSG0001191/ch1.z

Download Server	File Name	Date Added	Size	Download
download.sgi.com	patchSG0001191.tar	12-Mar-1996	40 K	FTP	HTTP
download.sgi.com	patchSG0001191.tardist	12-Mar-1996	40 K	FTP	HTTP
FTP = download using FTP protocol HTTP = download using HTTP protocol = store in your basket for downloading later