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Full Discussion: Using tee causing need for extra newlines.
Top Forums Shell Programming and Scripting Using tee causing need for extra newlines. Post 302550659 by buggin on Friday 26th of August 2011 03:43:14 PM
Old 08-26-2011
Using tee causing need for extra newlines.
I am working on capturing lines of output from a korn script that is used to import optical disks into a jukebox. The script is running on Solaris 8. Insertdiscs calls the binary named vimport which starts up and prompts for a disk to be inserted. I am able to capture output with this line below which would be perfect except that as soon as insertdiscs is piped to tee (as opposed to running it alone) I need to hit enter twice to get it to start vimport (see below) for each loop.

Code:
#!/bin/bash
#In Solaris 8 only bash handles the below process substitution properly.
 insertdiscs | tee >(egrep Imported\|INFO >> /tmp/importdisclog.txt)

I have tried
Code:
printf "\n" | insertdiscs | tee >(egrep Imported\|INFO >> /tmp/importdisclog.txt)

as well as piping from echo "\n" and all that gets me is infinite new lines at every prompt from the interactive vimport script.


This is the insertdiscs script that is called from my code above:
Code:
#!/bin/ksh
while [ $TRUE ]
do
  vimport -j 1
  rc=$?
  if [ $rc -eq 0 ]; then
    log_message "G" "Volume import succeeded for jukebox using insertdiscs."
  else
    log_message "B" "Volume import failed for jukebox using insertdiscs."
  fi
done

Any help appreciated.
Thanks,
Brett
 

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LEARN ABOUT HPUX

tee

tee(1)							      General Commands Manual							    tee(1)

NAME

       tee - pipe fitting to copy standard output to file

SYNOPSIS

       [file]...

DESCRIPTION

       The command transcribes the standard input to the standard output and makes copies in the files.

   Options
	      This option ignores interrupts.

	      This option appends the output to the
			files rather than overwriting the files.

EXTERNAL INFLUENCES

   Environment Variables
       determines the language in which messages are displayed.

       If is not specified in the environment or is set to the empty string, the value of is used as a default for each unspecified or empty vari-
       able.  If is not specified or is set to the empty string, a default of "C" (see lang(5)) is used instead of

       If any internationalization variable contains an invalid setting, behaves as if all internationalization variables are  set  to	"C".   See
       environ(5).

   International Code Set Support
       Single- and multibyte character code sets are supported.

RETURN VALUE

       The command returns zero upon successful completion, or nonzero if the command fails.

EXAMPLES

       Write a list of users to the screen and also append the list to the file

STANDARDS CONFORMANCE

																	    tee(1)
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