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Full Discussion: script to return value
Top Forums Shell Programming and Scripting script to return value Post 302104195 by mpang_ on Wednesday 24th of January 2007 03:51:22 AM
Old 01-24-2007
script to return value
I have 3 scripts

script A - wrapper script to disguise invoker true identity

script B - perform database operation and return a value (either W/H)
-> return value by echoing the result

script C - use script A to mask as the database owner then invoke script B to retrieve the value
-> /sys1/proclib/wrapper.sh dbadmin status.sh

I want to store the result in a variable, hence, status=`/sys1/proclib/wrapper.sh dbadmin status.sh`
but the result that I got back is actually "[YOU HAVE NEW MAIL] P" instead of just "P".

I found out that when script A is invoked, it would automatically echo "[YOU HAVE NEW MAIL]" to stdout.
All I want to be able to get the result from script B, anyone can help? Thanks!
 

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LEARN ABOUT REDHAT

tcl_allowexceptions

Tcl_AllowExceptions(3)                                        Tcl Library Procedures                                        Tcl_AllowExceptions(3)

__________________________________________________________________________________________________________________________________________________

NAME

       Tcl_AllowExceptions - allow all exceptions in next script evaluation

SYNOPSIS

       #include <tcl.h>

       Tcl_AllowExceptions(interp)

ARGUMENTS

       Tcl_Interp *interp (in)          Interpreter in which script will be evaluated.
_________________________________________________________________

DESCRIPTION

       If  a  script is evaluated at top-level (i.e. no other scripts are pending evaluation when the script is invoked), and if the script termi-
       nates with a completion code other than TCL_OK, TCL_ERROR or TCL_RETURN, then Tcl normally converts this into a TCL_ERROR  return  with  an
       appropriate  message.  The particular script evaluation procedures of Tcl that act in the manner are Tcl_EvalObjEx, Tcl_EvalObjv, Tcl_Eval,
       Tcl_EvalEx, Tcl_GlobalEval, Tcl_GlobalEvalObj, Tcl_VarEval and Tcl_VarEvalVA.

       However, if Tcl_AllowExceptions is invoked immediately before calling one of those a procedures, then arbitrary completion codes  are  per-
       mitted from the script, and they are returned without modification.  This is useful in cases where the caller can deal with exceptions such
       as TCL_BREAK or TCL_CONTINUE in a meaningful way.

KEYWORDS

       continue, break, exception, interpreter

Tcl                                                                     7.4                                                 Tcl_AllowExceptions(3)
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