Patch Name:  PHCO_9227

Patch Description: s700_800 10.20 POSIX shell cumulative patch

Creation Date: 96/11/15

Post Date:  96/11/19

Hardware Platforms - OS Releases:
        s700: 10.20
        s800: 10.20

Products: N/A

Filesets:
        OS-Core.UX-CORE OS-Core.CORE-ENG-A-MAN

Automatic Reboot?: No

Status: General Superseded

Critical: No

Path Name:  /hp-ux_patches/s700_800/10.X/PHCO_9227

Symptoms:
        PHCO_9227:
         1) While using in-line command editing, characters
            would sometimes appear that had not been typed
                by the user, most commonly ^B.  Also, in editing
                long history lines, especially near the end of
                the lines, garbage characters would appear and
                the line couldn't be edited properly.

         2) Posix shell when invoked with -c or called by
                the system() library call did not read commands
                from $ENV file.

         3) When Posix shell scripts were run with sh -c or
                system() calls, environment variables were being
                set or changed incorrectly.

                E.g.  sh -c "VAR=x a.out; echo \$VAR" should echo a
                blank, but instead echoes "x" because VAR was
                changed in the parent's environment.

         4) In Posix shell scripts run with sh -c or system()
            calls and including embedded "here" documents,
                temporary files (/tmp/sh?????.?) were not removed
                upon completion.

                E.g.

                sh -c "cat <<=
                hello
                ="

                left a file (/tmp/sh?????.?).

        PHCO_8785:
         1) A trap set within a function has no effect after
            the function returns.

            For example,

                trap 'echo exiting' EXIT
                f()
                {
                   trap 'echo alternate' EXIT
                }
                f

            will produce output:

                alternate
                exiting

            Correct output for a POSIX compliant shell is:

                alternate

         2) exit called from within a sourced file ( . file )
            from within a function exits the sourced file,
            but not the shell.

            For example, if file t1 contains:

                f()
                {
                        . ./t2
                }
                f
                echo should not get here

            and file t2 contains

                exit

            Output is "should not get here", but this script
            should produce no output.

         3) Some builtin commands cause the shell to exit
            when the command contains a syntax error.

            For example,

                ( fc -e ; echo code = $? ; exit 0 ) ; echo $?

            should output:

                sh: fc: Specify a parameter with this command.
                code = 1
                0

            but instead produces:

                sh: fc: Specify a parameter with this command.
                1

         4) When a here-document is used on the left side of
            a pipeline that is put into the background,
            the shell sometimes fails to open temporary
            files.

            For example,

                cat <<EOF | more &
                xxxx
                EOF

            will sometimes produce the error:

                /tmp/sh1811.2: cannot open

        PHCO_8578:
         shell dumps core on 'sh -c "a | b"'
         shell dumps core when here-doc is part of command
            substitution
         posix shell cd -P and pwd -P can fail when current
            directory path includes symbolic links where the
            link starts with ../
         pwd -P can return a path that does not exist.

Defect Description:
        PHCO_9227:
         1) While using in-line command editing, untyped
            characters would sometimes appear, most often
                ^B.  These occurred most typically when very
                long command lines had been created.  Also,
                in editing long history lines, especially
                near the end of the lines, garbage characters
                would appear and the line couldn't be edited
                properly.

         2) Posix shell when invoked with -c or called by
                the system() library call did not read commands
                from $ENV file.  The $ENV file is executed at
                the beginning of each shell invocation.  This
                was not being done for "-c" or system() usage.

         3) When using sh -c "command" or the system() library
                call, any shell variables assignment made as a
                prefix to a command would remain in the environment
                for subsequent commands.

         4) When using sh -c "command" or the system() library
                call with a here-doc, temporary files
                (/tmp/sh?????.?) were not being removed from /tmp.

        PHCO_8785:
         1) A trap set within a function has no effect after
            the function returns.  In a POSIX compliant shell,
            a trap is in effect until explicitly changed by
            another trap command.  Entering or returning
            from a function should have no effect on trap
            actions.  The shell was incorrectly saving the
            trap actions on entry to a function and restoring
            them to the caller's values upon returning.

         2) exit called from within a sourced file ( . file )
            from within a function exits the sourced file,
            but not the shell.  Since a sourced file is
            executed in the current environment, an exit should
            cause the shell to terminate.  Instead, the exit
            acts like a return in the function.

         3) Some builtin commands cause the shell to exit
            when the command contains a syntax error.  Only
            special builtin commands (those marked with daggers
            on the manpage, e.g. trap) should cause the shell
            to exit.  Regular builtin commands (e.g., cd and
            fc) should display an error and return a non-zero
            exit code, but the shell script should continue
            with the command immediately following.

         4) When a here-document is used on the left side of
            a pipeline that is put into the background,
            the shell sometimes fails to open temporary
            files.  A race condition exists that sometimes
            causes the shell to delete its temporary files
            before it has read them.

        PHCO_8578:
         shell dumps core on 'sh -c "a | b"'
         shell dumps core when here-doc is part of command
            substitution
         posix shell cd -P and pwd -P can fail when current
            directory path includes symbolic links where the
            link starts with ../
         pwd -P can return a path that does not exist.

SR:
        5003341651 5003338087 5003331280 5003335273 1653182162
        5003331256 5003333450 5003327981 1653172619 1653135228

Patch Files:
        /usr/lib/nls/msg/C/psh.cat
        /usr/bin/rsh
        /usr/bin/sh
        /sbin/sh
        /usr/share/man/man1.Z/sh-posix.1

what(1) Output:
        /usr/lib/nls/msg/C/psh.cat:
                None
        /usr/bin/rsh:
                Version M-11/16/88f
                $Revision: 78.16.1.14 $
                PATCH_10_20MR: /opt/langtools/lib/crt0.o builtin.o e
                        cho.o macro.o msg.o cmd.o print.o service.o
                        tilde.o xec.o main.o name.o adjust.o args.o
                        arith.o assign.o assnum.o cannon.o chkid.o c
                        onvert.o ctype.o defs.o edit.o emacs.o error
                        .o expand.o fault.o findnod.o gettree.o grow
                        aray.o gsort.o history.o hpux_rel.o io.o job
                        s.o linknod.o namscan.o optget.o rjust.o sta
                        k.o strdata.o streval.o string.o strmatch.o
                        test.o unassign.o utos.o valup.o vi.o word.o
                         96/11/15
                PATCH/10.20:PHCO_8764 libc.a_ID@@/main/r10dav/libc_d
                        av/libc_dav_cpe/2
                /ux/libc/libs/libc/archive_pa1/libc.a_ID
                Oct  2 1996 10:35:25
        /usr/bin/sh:
                Version M-11/16/88f
                $Revision: 78.16.1.14 $
                PATCH_10_20MR: /opt/langtools/lib/crt0.o builtin.o e
                        cho.o macro.o msg.o cmd.o print.o service.o
                        tilde.o xec.o main.o name.o adjust.o args.o
                        arith.o assign.o assnum.o cannon.o chkid.o c
                        onvert.o ctype.o defs.o edit.o emacs.o error
                        .o expand.o fault.o findnod.o gettree.o grow
                        aray.o gsort.o history.o hpux_rel.o io.o job
                        s.o linknod.o namscan.o optget.o rjust.o sta
                        k.o strdata.o streval.o string.o strmatch.o
                        test.o unassign.o utos.o valup.o vi.o word.o
                         96/11/15
                PATCH/10.20:PHCO_8764 libc.a_ID@@/main/r10dav/libc_d
                        av/libc_dav_cpe/2
                /ux/libc/libs/libc/archive_pa1/libc.a_ID
                Oct  2 1996 10:35:25
        /sbin/sh:
                Version M-11/16/88f
                $Revision: 78.16.1.14 $
                PATCH/10.20:PHCO_8764 libc.a_ID@@/main/r10dav/libc_d
                        av/libc_dav_cpe/2
                /ux/libc/libs/libc/archive_pa1/libc.a_ID
                Oct  2 1996 10:35:25
                PATCH_10_20MR: /opt/langtools/lib/crt0.o builtin.o e
                        cho.o macro.o msg.o cmd.o print.o service.o
                        tilde.o xec.o main_C.o name_C.o adjust.o arg
                        s.o arith.o assign.o assnum.o cannon.o chkid
                        .o convert.o ctype.o defs.o edit.o emacs.o e
                        rror.o expand.o fault.o findnod.o gettree.o
                        growaray.o gsort.o history.o hpux_rel.o io.o
                         jobs.o linknod.o namscan.o optget.o rjust.o
                         stak.o strdata.o streval.o string.o strmatc
                        h.o test.o unassign.o utos.o valup.o vi.o wo
                        rd.o 96/11/15
        /usr/share/man/man1.Z/sh-posix.1:
                None

cksum(1) Output:
        1521661560 5680 /usr/lib/nls/msg/C/psh.cat
        3678636003 438272 /usr/bin/rsh
        3678636003 438272 /usr/bin/sh
        1139258393 360448 /sbin/sh
        1480669307 44868 /usr/share/man/man1.Z/sh-posix.1

Patch Conflicts: None

Patch Dependencies:  None

Hardware Dependencies:  None

Other Dependencies:  None

Supersedes:
        PHCO_8578 PHCO_8785

Equivalent Patches:
        PHCO_9224:
        s700: 10.00
        s800: 10.00

        PHCO_9225:
        s700: 10.01
        s800: 10.01

        PHCO_9226:
        s700: 10.10
        s800: 10.10

Patch Package Size:  890 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.
        ------------------------------------------------------------
        1. Back up your system before installing a patch.

        2. Login as root.

        3. Copy the patch to the /tmp directory.

        4. Move to the /tmp directory and unshar the patch:

                cd /tmp
                sh PHCO_9227

        5a. For a standalone system, run swinstall to install the
            patch:

                swinstall -x autoreboot=true -x match_target=true \
                        -s /tmp/PHCO_9227.depot

        5b. For a homogeneous NFS Diskless cluster run swcluster on the
            server to install the patch on the server and the clients:

                swcluster -i -b

            This will invoke swcluster in the interactive mode and
            force all clients to be shut down.

            WARNING: All cluster clients must be shut down prior to the
                     patch installation.  Installing the patch while the
                     clients are booted is unsupported and can lead to
                     serious problems.

            The swcluster command will invoke an swinstall session in which
            you must specify:

                alternate root path  -  default is /export/shared_root/OS_700
                source depot path    -  /tmp/PHCO_9227.depot

            To complete the installation, select the patch by choosing
            "Actions -> Match What Target Has" and then "Actions -> Install"
            from the Menubar.

        5c. For a heterogeneous NFS Diskless cluster:

                - run swinstall on the server as in step 5a to install
                  the patch on the cluster server.

                - run swcluster on the server as in step 5b to install
                  the patch on the cluster clients.

        By default swinstall will archive the original software in
        /var/adm/sw/patch/PHCO_9227.  If you do not wish to retain a
        copy of the original software, you can create an empty file
        named /var/adm/sw/patch/PATCH_NOSAVE.

        Warning: If this file exists when a patch is installed, the
                 patch cannot be deinstalled.  Please be careful
                 when using this feature.

        It is recommended that you move the PHCO_9227.text file to
        /var/adm/sw/patch for future reference.

        To put this patch on a magnetic tape and install from the
        tape drive, use the command:

                dd if=/tmp/PHCO_9227.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions:  None