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Full Discussion: Trouble with tee command to capture script outputs
Top Forums Shell Programming and Scripting Trouble with tee command to capture script outputs Post 302288213 by cfajohnson on Monday 16th of February 2009 05:52:59 PM
Old 02-16-2009
Quote:
Originally Posted by muthubharadwaj
Code:
function GetInput
{
    print -n "Input"
    read input
    export INPUT=$input
}


When posting non-standard scripts, you should indicate which shell they are for.

Even better is to use standard syntax:

Code:
GetInput()
{
    printf "Input: "
    read INPUT
}

Quote:
Code:
export COMMAND="GetInput"
 
$COMMAND
echo "$INPUT"
 
$COMMAND | tee -a Log.log
echo "$INPUT"

The first one without "tee" works fine. echo "$INPUT" displays the values I type in for input. The second one always shows $INPUT as empty string. Why?[/code]

Where have you output the value of $INPUT? Not in $COMMAND, which is what you are redirecting.
Quote:
[code] Is there any other way to execute a shell function and capture its log output and at the same time display its output on the stdout device too without impacting its actual behavior? As you can see here, although the fucntion exports the variable INPUT, it is not available when the function call returns to the calling script code.

export does nothing there; export makes variables visible to child processes, not parent processes.

You are executing $COMMAND in a pipeline, and all elements of a pipeline (all but the last in ksh) are executed in a subshell.

Code:
GetInput()
{
    printf "Input: "
    read INPUT
}
COMMAND="GetInput"

$COMMAND
printf "%s\n" "$INPUT" | tee -a Log.log

 

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LEARN ABOUT REDHAT

msgexec

MSGEXEC(1)								GNU								MSGEXEC(1)

NAME

       msgexec - process translations of message catalog

SYNOPSIS

       msgexec [OPTION] COMMAND [COMMAND-OPTION]

DESCRIPTION

       Applies	a  command  to	all  translations of a translation catalog.  The COMMAND can be any program that reads a translation from standard
       input.  It is invoked once for each translation.  Its output becomes msgexec's output.  msgexec's return code is the  maximum  return  code
       across all invocations.

       A  special builtin command called '0' outputs the translation, followed by a null byte.	The output of "msgexec 0" is suitable as input for
       "xargs -0".

       Mandatory arguments to long options are mandatory for short options too.

   Input file location:
       -i, --input=INPUTFILE
	      input PO file

       -D, --directory=DIRECTORY
	      add DIRECTORY to list for input files search

       If no input file is given or if it is -, standard input is read.

   Informative output:
       -h, --help
	      display this help and exit

       -V, --version
	      output version information and exit

AUTHOR

       Written by Bruno Haible.

REPORTING BUGS

       Report bugs to <bug-gnu-gettext@gnu.org>.

COPYRIGHT

       Copyright (C) 2001-2002 Free Software Foundation, Inc.
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

SEE ALSO

       The  full  documentation  for  msgexec  is maintained as a Texinfo manual.  If the info and msgexec programs are properly installed at your
       site, the command

	      info msgexec

       should give you access to the complete manual.

GNU gettext 0.11.4						     July 2002								MSGEXEC(1)
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