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Full Discussion: bash shell piping
Top Forums Shell Programming and Scripting bash shell piping Post 302230078 by era on Thursday 28th of August 2008 02:48:00 PM
Old 08-28-2008
Your command means OHOME=echo and while that assignment is in place, run the command $OHOME which of course is not a valid command.

To capture the output of a command, put it in backticks (ASCII 96, not regular straight quotes):

Code:
O_BASE=`echo $OHOME | awk -F"/" '{for(i=2;i<=NF;i++) {if($i=="product"){exit;} a=a"/"$i; }} '`

$OHOME should properly be in double quotes, learn that now and you will get fewer surprises later (although in this case it doesn't really make a difference).

If your shell allows $(...) instead of backticks `...` that is perhaps more readable, although nominally less portable to legacy Bourne shell.

Your awk script doesn't appear to do anything with the a part, if you mean to capture it, you need to print it.

To strip off everything after the first occurrence of /product/ you can use the shell's variable substitution mechanism:

Code:
O_BASE=${OHOME%/product/*}

(Your awk script skips the first component /aaa, is that intentional? You can remove that with another variable substitution, O_BASE=${O_BASE#/aaa})
Last edited by era; 08-28-2008 at 03:56 PM.. Reason: Variable substitution remarks
 

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LEARN ABOUT LINUX

shtool-echo

SHTOOL-ECHO.TMP(1)					      GNU Portable Shell Tool						SHTOOL-ECHO.TMP(1)

NAME

       shtool-echo - GNU shtool echo(1) extensional command

SYNOPSIS

       shtool echo [-n|--newline] [-e|--expand] string

DESCRIPTION

       shtool echo is an echo(1) style command which prints string to stdout and optionally provides special expansion constructs (terminal bold
       mode, environment details, date, etc) and newline control. The trick of this command is that it provides a portable -n option and hides the
       gory details needed to find out the environment details under option -e.

OPTIONS

       The following command line options are available.

       -n, --newline
	   By default, output is written to stdout followed by a "newline" (ASCII character 0x0a). If option -n is used, this newline character is
	   omitted.

       -e, --expand
	   If option -e is used, string can contain special "%x" constructs which are expanded before the output is written. Currently the
	   following constructs are recognized:

	   %B  switch terminal mode to bold display mode.

	   %b  switch terminal mode back to normal display mode.

	   %u  the current user name.

	   %U  the current user id (numerical).

	   %g  the current group name.

	   %G  the current group id (numerical).

	   %h  the current hostname (without any domain extension).

	   %d  the current domain name.

	   %D  the current day of the month.

	   %M  the current month (numerical).

	   %m  the current month name.

	   %Y  the current year.

EXAMPLE

	#   shell script
	shtool echo -n -e "Enter your name [%B%u%b]: "; read name
	shtool echo -e "Your Email address might be %u@%h%d"
	shtool echo -e "The current date is %D-%m-%Y"

HISTORY

       The GNU shtool echo command was originally written by Ralf S.  Engelschall <rse@engelschall.com> in 1998 for Website META Language (WML)
       under the name buildinfo. It was later taken over into GNU shtool.

SEE ALSO

       shtool(1), echo(1).

18-Jul-2008							   shtool 2.0.8 						SHTOOL-ECHO.TMP(1)
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