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Full Discussion: exit status of command in a pipe line
Top Forums UNIX for Dummies Questions & Answers exit status of command in a pipe line Post 47545 by topcat8 on Thursday 12th of February 2004 09:36:04 AM
Old 02-12-2004
exit status of command in a pipe line
Hi,

I am trying to test the exit status of the cleartool lsvtree statement below, but it doesn't seem to be working due to the tail pipe, which it is testing instead. Is there a way around this without adding a tonne of new code?
Code:
   cleartool lsvtree $testlocation/$exe_name | tail -15
   #exit out if not file not in dir
   if [ $? -ne 0 ]; then
          echo "Error: File not in test or application area"
          exit 1
   fi

Thanks
Cath

added code tags for readability --oombera
Last edited by oombera; 02-18-2004 at 12:29 PM..
 

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LEARN ABOUT DEBIAN

inotail

INOTAIL(1)						       Inotify enhanced tail							INOTAIL(1)

NAME

       inotail - A fast and lightweight version of tail using inotify

SYNOPSIS

       inotail [OPTION]... [FILE]...

DESCRIPTION

       inotail	is a replacement for the 'tail' program found in the base installation of every Linux/UNIX system. It makes use of the inotify in-
       frastructure in recent versions of the Linux kernel to speed up tailing files in the follow mode (the '-f' option). Standard tail polls the
       file every second by default while inotail listens to special events sent by the kernel through the inotify API to determine whether a file
       needs to be reread. Note: inotail will not work on systems running a kernel without inotify. To enable inotify, please set CONFIG_INOTIFY=y
       in your Linux kernel configuration and recompile it.

       Currently inotail is not fully compatible to neither POSIX or GNU tail but might be in the future.

OPTIONS

       -c N, --bytes=N
	      output the last N bytes. If the first character of N is a '+', begin printing with the Nth character from the start of each file.

       -f, --follow
	      keep the file(s) open and print appended data as the file grows

       -n N, --lines=N
	      output  the last N lines (default: 10) If the first character of N is a '+', begin printing with the Nth line from the start of each
	      file.

       -v, --verbose
	      print headers with file names

       -h, --help
	      show help and exit

       -V, --version
	      show inotail version and exit

AUTHOR

       Written by Tobias Klauser <tklauser@distanz.ch>

SEE ALSO

       tail(1), inotify(7)

								    2006-08-13								INOTAIL(1)
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