Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Python call to bash script returns empty string
Top Forums Shell Programming and Scripting Python call to bash script returns empty string Post 302640339 by arod291 on Tuesday 15th of May 2012 08:30:07 AM
Old 05-15-2012
Even if I remove the java call and just replace it for some hard-coded value in my bash script, my python script still returns empty string.

for example I commented the java call line and just left this line as such and i still get ('', None) for the result?

Code:
 
echo $@

---------- Post updated 05-15-12 at 08:29 AM ---------- Previous update was 05-14-12 at 02:01 PM ----------

Anybody knows what's going on here? Thanks!

---------- Post updated at 08:30 AM ---------- Previous update was at 08:29 AM ----------

Can someone help with this?
Last edited by arod291; 05-15-2012 at 09:28 AM..
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Perl cgi script to call bash script?

Novice to perl here. I have created a simple web page in perl, with only one submit button. I would like to execute a bash script on the same server when this button is clicked on. Is this possible in perl? I have spent a few days researching this and am unable to find any useful information.... (0 Replies)
Discussion started by: pleonard
0 Replies

2. Shell Programming and Scripting

how to call a bash script using perl

Hi I m new to perl. I m trying to write a perl script that calls a bash script; does anyone have a script already that they can provide or help me out? Thanks a lot. (2 Replies)
Discussion started by: adnan786
2 Replies

3. Shell Programming and Scripting

Bash Script verify user input is not empty and is equal to a value

I need to create a script that has a user enter a value. I want to verify that the value is either 1,2, or 3. If it is not then I want them to try entering it again. I am using a while loop to force them to retry. I am able to test the input against 1,2, and 3, but when I test agains an... (4 Replies)
Discussion started by: spartiati
4 Replies

4. Shell Programming and Scripting

awk print last line returns empty string

hello I have a file with lines of info separated with "|" I want to amend the second field of the last line, using AWK my problem is with geting awk to return the last line this is what I am using awk 'END{ print $0 }' myFile but I get an empty result I tried the... (13 Replies)
Discussion started by: TasosARISFC
13 Replies

5. Shell Programming and Scripting

Shell Variable in Curly Brackets Returns Empty Value

Hello Team, I have a script which will grep for a time from a file. I have following code to grep for a time in a file. node=`hostname` current_date=`date` file11=weblogic.log next_date=`date '+%b %e, %Y'` next_date_time11=`grep -i "${#next_date}" ${file11}| tail -1 | awk... (3 Replies)
Discussion started by: coolguyamy
3 Replies

6. Shell Programming and Scripting

[Solved] Unable to call a python script from bash

Hi, I am trying to run a python script embedded in bash script. But is throwing me an error. Please help. Script: #!/bin/bash nohup /usr/bin/python /opt/web/http.py & Error: /usr/bin/python: can't open file '/opt/web/http.py': No such file or directory Please help me on this. (6 Replies)
Discussion started by: maddy26615
6 Replies

7. Shell Programming and Scripting

Call a Perl script within a bash script and store the ouput in a .txt file

I'm attempting to write a bash script that will create a network between virtual machines. It accepts three arguments: an RSpec that describes the network topology, and two list of machines (servers and clients). I have a (working) Perl script that I want to call. This Perl script takes an RSpec... (6 Replies)
Discussion started by: mecaka
6 Replies

8. UNIX for Advanced & Expert Users

Calling expect from shell script which inturn call python

Hi Team, I have to execute a task from my local machine, where i keep my .expect,.sh, .bash and .python scripts .Task are coded in the script and has to be executed at remote machine. for that i used following task ..... SCRIPT 1: cat shell_check.sh read value if then expect... (3 Replies)
Discussion started by: Sivarajan N
3 Replies

9. Shell Programming and Scripting

Beginner here, how to call a bash-script from python properly?

Hi everyone, i have the following script.sh: foo='lsusb | grep Webcam | cut -c16-18' sudo /home/user/public/usbreset /dev/bus/usb/001/$foo when i try to call this script from python using subprocess.call("script.sh", shell=True) it seems that only 'sudo /home/user/public/usbreset' is being... (6 Replies)
Discussion started by: hilfemir
6 Replies

10. Shell Programming and Scripting

How to use scl enable python command call with in bash shell script?

I have a bash shell script, within it i am using the below two commands . its failing right on scl enable command itself. if i run it by itself without a shell, it works fine. by default it is using pythin version 2.6 something. i want to use 3.4 version for that reason with in the shell... (3 Replies)
Discussion started by: cplusplus1
3 Replies

LEARN ABOUT DEBIAN

alien::package::rpm

Alien::Package::Rpm(3pm)				User Contributed Perl Documentation				  Alien::Package::Rpm(3pm)

NAME

       Alien::Package::Rpm - an object that represents a rpm package

DESCRIPTION

       This is an object class that represents a rpm package. It is derived from Alien::Package.

FIELDS

       prefixes
	   Relocatable rpm packages have a prefixes field.

METHODS

       checkfile
	   Detect rpm files by their extention.

       install
	   Install a rpm. If RPMINSTALLOPT is set in the environement, the options in it are passed to rpm on its command line.

       scan
	   Implement the scan method to read a rpm file.

       unpack
	   Implement the unpack method to unpack a rpm file. This is a little nasty because it has to handle relocatable rpms and has to do a bit
	   of permissions fixing as well.

       prep
	   Prepare for package building by generating the spec file.

       cleantree
	   Delete the spec file.

       build
	   Build a rpm. If RPMBUILDOPT is set in the environement, the options in it are passed to rpm on its command line.

	   An optional parameter, if passed, can be used to specify the program to use to build the rpm. It defaults to rpmbuild.

       version
	   Set/get version.

	   When retreiving the version, remove any dashes in it.

       postinst
       postrm
       preinst
       prerm
	   Set/get script fields.

	   When retrieving a value, we have to do some truely sick mangling. Since debian/slackware scripts can be anything -- perl programs or
	   binary files -- and rpm is limited to only shell scripts, we need to encode the files and add a scrap of shell script to make it
	   unextract and run on the fly.

	   When setting a value, we do some mangling too. Rpm maintainer scripts are typically shell scripts, but often lack the leading shebang
	   line.  This can confuse dpkg, so add the shebang if it looks like there is no shebang magic already in place.

	   Additionally, it's not uncommon for rpm maintainer scripts to contain bashisms, which can be triggered when they are ran on systems
	   where /bin/sh is not bash. To work around this, the shebang line of the scripts is changed to use bash.

	   Also, if the rpm is relocatable, the script could refer to RPM_INSTALL_PREFIX, which is set by rpm at run time. Deal with this by
	   adding code to the script to set RPM_INSTALL_PREFIX.

       arch
	   Set/get arch field. When the arch field is set, some sanitizing is done first to convert it to the debian format used internally. When
	   it's retreived it's converted back to rpm form from the internal form.

AUTHOR

       Joey Hess <joey@kitenet.net>

perl v5.14.2							    2011-08-05						  Alien::Package::Rpm(3pm)
All times are GMT -4. The time now is 08:25 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy