Sponsored Content
Top Forums Shell Programming and Scripting How to get BASH to interpret pipes in a string correctly? Post 302181306 by jim mcnamara on Wednesday 2nd of April 2008 02:52:29 PM
Old 04-02-2008
try eval "command 1 2 3 | command2"
example
Code:
csadev:/home/jmcnama> p="ls -l | grep '^d'"
csadev:/home/jmcnama> eval "$p"

 

10 More Discussions You Might Find Interesting

1. Filesystems, Disks and Memory

PIPEs and Named PIPEs (FIFO) Buffer size

Hello! How I can increase or decrease predefined pipe buffer size? System FreeBSD 4.9 and RedHat Linux 9.0 Thanks! (1 Reply)
Discussion started by: Jus
1 Replies

2. Shell Programming and Scripting

How Do We Interpret This ?

ksh $ETL_XXX/bin/filename.ksh wf_workflowname . Which is used in post session command. (2 Replies)
Discussion started by: dummy_needhelp
2 Replies

3. UNIX for Dummies Questions & Answers

Please interpret.

Hi guys, I have no idea on unix but suddenly, my cobol programs calls a unix script that i know nothing about. can you guys interpret these lines for me? i know its a print command but I want to actually know how many copies it prints. qprt -da -P $1 -t '6' -i '6' -l '70' $2 qprt -da... (1 Reply)
Discussion started by: supacow
1 Replies

4. Shell Programming and Scripting

Bash Tarring not un Tarring correctly

HI All, Im encountering behaviour that is not correct for my requirements when I untar a file. Im using the below command to tar up files from various folders to the ARCHIVE folder as below... tar -cvf "$ARCHIVE_PATH"/"$dte_tar_filename" "$LOG_PATH" "$PROCESSED_PATH2" "$ERROR_PATH" ... (5 Replies)
Discussion started by: satnamx
5 Replies

5. Shell Programming and Scripting

Can someone interpret this -- not sure

Was wondering if someone could interpret this for me -- I'm not sure what everything means. It's a shell script from my bash book: cd () { builtin cd "$@" es=$? echo "$OLDPWD ->$PWD" return $es } what I don't quite understand is the "$@". I think, if I understand... (6 Replies)
Discussion started by: Straitsfan
6 Replies

6. Shell Programming and Scripting

redirect an awk string output to a script input with pipes

Hi, I have a function in a bash script that returns a string after some operations using awk. The following code returns 555 $VARIABLE="EXAMPLE" get_number $VARIABLE this value I'd like to pass it as a second argument of another script with the following usage myscript.sh <param1>... (7 Replies)
Discussion started by: rid
7 Replies

7. UNIX for Dummies Questions & Answers

Bash does not wrap long lines correctly

Ksh is my default shell, but I want use the bash shell since its convenient to me. When I type a long command line in a terminal, it does not wrap to the next line when I reach the end of the line and it wraps onto the same line, overwriting my prompt and the rest of what I typed. $... (5 Replies)
Discussion started by: senthil.ak
5 Replies

8. Programming

Fork and Execvp Not Executing Bash Commands From C correctly.

I had been looking at page 75 of this online book: http://richard.esplins.org/static/downloads/linux_book.pdf I've used the system function in C to call bash commands before, but wanted to learn this way too. The solution in the book worked perfectly. However, I tried changing the simple "ls -l... (3 Replies)
Discussion started by: Azrael
3 Replies

9. UNIX for Beginners Questions & Answers

Who -r interpret?

I booted into single user mode with /usr/sbin/reboot -- -s but after doing a control -d my who -r shows run-level 3 Nov 17 14:07 3 0 S I was expecting it to show run-level S why is this still in run level 3? thanks (1 Reply)
Discussion started by: goya
1 Replies

10. UNIX for Beginners Questions & Answers

Escape bash-special character in a bash string

Hi, I am new in bash scripting. In my work, I provide support to several users and when I connect to their computers I use the same admin and password, so I am trying to create a script that will only ask me for the IP address and then connect to the computer without having me to type the user... (5 Replies)
Discussion started by: arcoa05
5 Replies
LIBBASH(7)							  libbash Manual							LIBBASH(7)

NAME
libbash -- A bash shared libraries package. DESCRIPTION
libbash is a package that enables bash dynamic-like shared libraries. Actually its a tool for managing bash scripts whose functions you may want to load and use in scripts of your own. It contains a 'dynamic loader' for the shared libraries ( ldbash(1)), a configuration tool (ldbashconfig(8)), and some libraries. Using ldbash(1) you are able to load loadable bash libraries, such as getopts(1) and hashstash(1). A bash shared library that can be loaded using ldbash(1) must answer 4 requirments: 1. It must be installed in $LIBBASH_PREFIX/lib/bash (default is /usr/lib/bash). 2. It must contain a line that begins with '#EXPORT='. That line will contain (after the '=') a list of functions that the library exports. I.e. all the function that will be usable after loading that library will be listed in that line. 3. It must contain a line that begins with '#REQUIRE='. That line will contain (after the '=') a list of bash libraries that are required for our library. I.e. every bash library that is in use in our bash library must be listed there. 4. The library must be listed (For more information, see ldbashconfig(8)). Basic guidelines for writing library of your own: 1. Be aware, that your library will be actually sourced. So, basically, it should contain (i.e define) only functions. 2. Try to declare all variables intended for internal use as local. 3. Global variables and functions that are intended for internal use (i.e are not defined in '#EXPORT=') should begin with: __<library_name>_ For example, internal function myfoosort of hashstash library should be named as __hashstash_myfoosort This helps to avoid conflicts in global name space when using libraries that come from different vendors. 4. See html manual for full version of this guide. AUTHORS
Hai Zaar <haizaar@haizaar.com> Gil Ran <ril@ran4.net> SEE ALSO
ldbash(1), ldbashconfig(8), getopts(1), hashstash(1) colors(1) messages(1) urlcoding(1) locks(1) Linux Epoch Linux
All times are GMT -4. The time now is 09:04 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy