Login or Register to Ask a Question and Join Our Community

Sponsored Content
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
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Run a C Shell using only Bash shell

Hi, I have only bash on my system. And I want to run a C shell... Is there a way for that? (3 Replies)
Discussion started by: HSN
3 Replies

2. Shell Programming and Scripting

Piping from BASH in to an Instant Messenger??

Is it possible to pipe a command in to an instant messenger e.g pidgin, finch or something similar and have it send??? e.g echo "hello" | messenger Or is there anything similar?? Thanks in advance! (1 Reply)
Discussion started by: 64mb
1 Replies

3. Shell Programming and Scripting

I need to understand the differences between the bash shell and the Bourne shell

I do not claim to be an expert, but I have done things with scripts that whole teams of folks have said can not be done. Of course they should have said we do not have the intestinal fortitude to git-r-done. I have been using UNIX actually HPUX since 1992. Unfortunately my old computer died and... (7 Replies)
Discussion started by: awk_sed_hello
7 Replies

4. Shell Programming and Scripting

Piping output from a command into bash script

Hi all. I am using procmail to deliver an email to a script I am developing. Procmail delivers the email to the script on standard input. I imagine this is the same as piping input from a command into the script. Hence I've been testing my script by running echo 'test' | sms-autosend-backup.sh ... (2 Replies)
Discussion started by: akindo
2 Replies

5. Shell Programming and Scripting

Exit code from piping in unix shell script

Hi , I have following code in my shell script : "$TS_BIN/tranfrmr" "${TS_SETTINGS}/tranfrmr_p1.stx" "${TS_LOGS}/tranfrmr_p1.err" | ( "$TS_BIN/cusparse" "${TS_SETTINGS}/cusparse_p2.stx" "${TS_LOGS}/cusparse_p2.err" | ( "$TS_BIN/tsqsort" "${TS_SETTINGS}/srtforpm_p3.stx"... (8 Replies)
Discussion started by: sonu_pal
8 Replies

6. Shell Programming and Scripting

Oneliner ---split string to character by piping shell output to perl

Hello, I was trying to split a string to characters by perl oneliner. echo "The quick brown fox jumps over the lazy dog" | perl -e 'split // ' But did not work as with bash script pipe: echo "The quick brown fox jumps over the lazy dog" | fold -w1 | sort | uniq -ic 8 1 T 1... (6 Replies)
Discussion started by: yifangt
6 Replies

7. UNIX for Dummies Questions & Answers

Which of the following command displays your login shell in bash shell?

Options:: A)$shell B)echo $ bash C)echo $ O D)$ O (1 Reply)
Discussion started by: raghugowda
1 Replies

8. Programming

Linux Shell Piping w/Shared Memory

So I am pretty new to the linux environment, and I am trying to create a shell that uses multiple pipes, and I read online that piping using shared memory space is more efficient than using regular piping. However, I have zero clue how to use shared memory space with pipes. Has anyone done this... (1 Reply)
Discussion started by: Greg_MC
1 Replies

9. Shell Programming and Scripting

Different behavior between bash shell and bash script for cmd

So I'm trying to pass certain json elements as env vars and use them later on in a script. Sample json: JSON='{ "Element1": "file-123456", "Element2": "Name, of, company written in, a very weird way", "Element3": "path/to/some/file.txt", }' (part of the) script: for s... (5 Replies)
Discussion started by: da1
5 Replies

10. UNIX for Beginners Questions & Answers

In Bash shell - the ps -ef shows only the /bin/bash but the script name is not displayed

In Bash shell - the ps -ef shows only the /bin/bash but the script name is not displayed ? Is there any way to get the script names for the process command ? --- Post updated at 08:39 AM --- in KSH (Korn Shell), my command output shows the script names but when run in the Bash Shell... (3 Replies)
Discussion started by: i4ismail
3 Replies

LEARN ABOUT SUNOS

asadmin-stop-appserv

asadmin-stop-appserv(1AS)					   User Commands					 asadmin-stop-appserv(1AS)

NAME

       asadmin-stop-appserv, stop-appserv - stops the domains inthe specified directory

SYNOPSIS

       stop-appserv [--domaindir install_dir/domains] [--terse=false] [--echo=false]

       This  command  has  been deprecated. Please use stop-domain to stop the domains in the specified or default domains directory. stop-appserv
       stops the domains in the specified or default domains directory. If the domains directory is not specified,  the  domains  in  the  default
       domains directory are stopped. The default domains directory is install_dir/domains. This command can only be run locally.

OPTIONS

       --domaindir	       directory where the domains are stopped. If specified, path must be accessible in the filesystem. If not specified,
			       the domain is stopped in the default install_dir/domains directory.

       --terse		       indicates that any output data must be very concise, typically avoiding human-friendly sentences and favoring well-
			       formatted data for consumption by a script. Default is false.

       --echo		       setting to true will echo the command line statement on the standard output. Default is false.

EXIT STATUS

       0		       command executed successfully

       1		       error in executing the command

       asadmin-create-domain(1AS), asadmin-start-domain(1AS), asadmin-stop-domain(1AS), asadmin-delete-domain(1AS), asadmin-list-domains(1AS)

J2EE 1.4 SDK							    March 2004						 asadmin-stop-appserv(1AS)
All times are GMT -4. The time now is 02:19 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy