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IDS Forum

RE: RE: I have a puzzling situation

Posted By: John Adamski
Date: Monday, 5 November 2012, at 1:39 p.m.

Jim,

Here is the code (sql) using in my test procedure:

drop procedure testsysfail;

create procedure testsysfail()
returning char(32);

on exception in (-668)

return "Failed, error 668";
end exception;

SYSTEM " /tmp/test.csh";

return "succeded";
end procedure;

grant execute on testsysfail to public;

It is based on the production procedure, I just kept the few lines I needed that I thought to get a good equivalent procedure. As you can see the SYSTEM line only has SYSTEM " /tmp/test.csh"

And this is the content of the test.csh script:

#!/bin/csh -f
##
printenv | sort >& /tmp/test.log

id -rg >>& /tmp/test.log

id -ru >>& /tmp/test.log

exit 0

I reran the procedure as both users and get the same results one works one doesn't.

I than changed the SYSTEM command to be like your suggestion below " /usr/bin/csh -f -v -x -c /tmp/test.sh >& /tmp/test.log ". I get the 668 error on the user that normally works. I also changed the SYSTEM command to go to test2.log, still get the 668 error. Then I did a which csh and changed the SYSTEM command to use /bin.csh and same results.

If I'm understanding your logic, running csh in the SYSTEM should have forced a sub-shel - well that doesn't seem to working. Which might imply one user is getting a sub-shell and the other not. But I can't find any setup that is different between the two users.

john

-----Original Message-----
From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf Of jim-cramer@uiowa.edu
Sent: Friday, November 02, 2012 12:47 PM
To: ids@iiug.org
Subject: RE: RE: I have a puzzling situation [28698]

Hi John,

What might be most helpful for us would be if you could post the exact string, containing whatever is to be run by the shell, which is specified with SYSTEM in the proc.

fyi:

1) in case any more questions about the environment for the command run by SYSTEM come up , I am including below what my test.sh script dumped out. However, I am on Linux SLES and you are on HPUX so perhaps the Linux OS does things differently when the use of SPL SYSTEM causes the OS system() function to fork off a shell for running the command specified with SYSTEM in. But I still thought that I would send it in case it helps as a reference to what you see in your test Environment. Also, it raises a couple of questions, And I have a suggestion too.

NOTE 1 strange thing in the output, the Env Var near the end of the Env dump is:

SHLVL=1

which means that a *login* shell (shell level 1) is being created by the OS to run the command in, which means that not only personal user dot files but system-wide scripts, depending upon the shell which ones, will run. This makes the questions about the shell's Env more complex.

2) Also, I thought that person earlier posted that the command executed in the shell due to the use of SYSTEM in a SP is executed in a *sub*-shell. Perhaps that is true on OS platforms for IDS and not true on others. I did not see the SHLVL Env Var in the Environment listing for your sucessful tests. I guess that you would have to consult man pages for either the HPUX or the particular shell, csh, used in the tests.

3) I seem to remember that you were redirecting standard error to the test's log file. You did that for each of the 3 commands in test.sh, right?.

You could try this as the argument to SYSTEM to be run by the SP

" /usr/bin/csh -f -v -x -c /tmp/test.sh >& /tmp/test.log "

It will start a subshell for the test.sh script, not source in .cshrc and any other dot files, and echo to the log file every command before it executes so that you can see if test.sh even run and, if so, where it dies.

The redirection of stdin and stdout on the command line SYSTEM specifies might dump something useful to stderr if it cannot even run the csh subshell.

4) ALSO, check the ~/.history file in the HD of the username that ran the Proc.
This might tell you what ran and did not run, or if nothing ran at all.

5) Finally, I discovered that one of the "id" commands I gave you was wrong.

"id -r" should have been "id -ru"

That command will get the userid of the user under whose id the shell or subshell was created. See if it is the id of the user runing the proc, or else that of informix or root.

"id -u"

was correct and would give you the "effective" id, which would be different than the "real" if a different userid started up the shell under it's id but made the call to change the "effective" id to that of the user who ran the proc.

In my platform and environment, the real id was mine, who ran the test. If that is the case then the "effective" id should be the same and no SETUID business is going on.
That is why both ids immediately below for me are my user id, 13008.

I would be interested in what the 2 ids turn out to be and who they belong to on your system if you happen to run the test.sh script again.

Regards,
Jim

13008
13008
CLIENT_LOCALE=en_us.8859-1
DBCENTURY=C
DBPATH=//ids_np
DBTEMP=/tmp
DB_LOCALE=en_us.8859-1
INFORMIXDIR=/opt/db/ids
INFORMIXSERVER=ids
INFORMIXSQLHOSTS=/opt/db/etc/sqlhosts
LANG=POSIX
LC_COLLATE=POSIX
LC_CTYPE=en_US.UTF-8
LC_MONETARY=POSIX
LC_NUMERIC=POSIX
LC_TIME=POSIX
ONCONFIG=onconfig
PATH=/opt/bdl3.5r16b/bin:/opt/db/informix/fg_vdt3/bin:/opt/db/informix/fg_vd
t3/bin:/opt/bdl3.5r16b/bin:/opt/db/bin:/opt/db/informix/4gltools7.3/bin:/opt
/bdl3.5r16b/bin:/opt/db/informix/fg_vdt3/bin:/opt/db/informix/fg_vdt3/bin:/o
pt/bdl3.5r16b/bin:/opt/db/bin:/opt/db/informix/4gltools7.3/bin:/opt/bdl3.5r1
6b/bin:/opt/db/informix/fg_vdt3/bin:/opt/db/informix/fg_vdt3/bin:/opt/bdl3.5
r16b/bin:/opt/db/bin:/opt/db/informix/4gltools7.3/bin:/user/eng/jcramer/bin:
/usr/local/bin:/usr/bin:/opt/ansic/bin:/usr/ccs/bin:/usr/contrib/bin:/usr/co
ntrib/Q4/bin:/opt/perl/bin:/opt/ipf/bin:/opt/mpi/bin:/opt/hparray/bin:/opt/n
ettladm/bin:/opt/fcms/bin:/opt/mozilla:/opt/netscape:/usr/local/bin:/opt/sec
_mgmt/bastille/bin:/opt/resmon/bin:/opt/gnome/bin:/opt/graphics//phigs/bin:/
usr/bin/X11:/usr/sbin/diag/contrib:/usr/contrib/kwdb/bin:/opt/wbem/bin:/opt/
wbem/sbin:/opt/graphics/common/bin:/opt/sec_mgmt/spc/bin:/opt/mx/bin:/opt/hp
smh/bin:/opt/upgrade/bin:/opt/gwlm/bin:/usr/contrib/bin/X11:/opt/aCC/bin:/op
t/fortran90/bin:/opt/fortran90/contrib/bin:/opt/perf/bin:/opt/STK/bin:/opt/l
angtools/bin:/opt/imake/bin:/usr/ui/class/com
PDQPRIORITY=0
PWD=/home/jcramer
SERVER_LOCALE=en_us.8859-1
SHELL=/usr/bin/bash
SHLVL=1
SQLPID=1470959656
TZ=CST6CDT
_=/usr/bin/env:

-----Original Message-----
From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf Of JASON HARRIS
Sent: Thursday, November 01, 2012 11:34 PM
To: ids@iiug.org
Subject: Re: RE: I have a puzzling situation [28695]

Hi John,

The first id statement in your test.csh might have an error in it, so even when you execute the script correctly, you still get a non-zero exit status.

Fix it, i.e. id -ru or id -rg depending on what you want, or explicitly put an exit 0 at the end of the script.

It is also good practice to output stderr to the log as well as stdout. This

will capture any errors from the commands in the script. e.g. >&test.log instead of just >test.log. This would show you the error with the id statement.

You sure have checked a lot of different things. Here a couple more to keep you going.

Change your exception handling to set a value containing the actual SQL and ISAM error codes, and include them in your returned string.

Check you can successfully execute the script when logged in as each user, without using the stored procedure.

Check for the existence of a .informix file in the users home directory, it is another way to get settings into a session.

Make sure you are creating the stored procedure as the user Informix.

Otherwise, contact tech support cause it might be a bug.

HTH,

Jason

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