Sponsored Content
Top Forums Shell Programming and Scripting Problem using "system" command in perl Post 302578851 by evolabo on Friday 2nd of December 2011 02:05:15 PM
Old 12-02-2011
Question Problem using "system" command in perl

Hello!!!

I'm trying to pass the output from bash command to perl variable in a perl script, and I used the "system" command to execute the bash statment and pass the result to perl string variable, in this perl script I used a variable $file that store data for using it as a regular expression.
Here I show you some part of the script:

Code:
$output = system "find /path/ | grep $file | sed 's/ /\ /g'";
system "evince $output";
print $output;

Output: in the screen the script prints 0

The result I want obtain is the path found by grep allocated in the perl variable $output.

the only I have obtained is a zero allocated in $output perl variable. I have tried the bash one-line script in linux terminal and it works very fine because it shows me the correct result I want.

I would appreciate if you can help me to solve this
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

perl "system" cmd return values..

perl 5.6.1: when i try a "system" command(with if loops for $?), i get this: child exited with value 1 what is meant by this $? values and what does it meant if it returns 1?.. (0 Replies)
Discussion started by: sekar sundaram
0 Replies

2. UNIX for Dummies Questions & Answers

Unix "at" / "Cron" Command New Problem...Need help

Hi All, I am trying to schedule a one time job using the at command with the help of shell script for my project. The shell script should take a parameter as a command line argument from the at command itself. Is it possible to take a command line parameter for a shell script in the command... (3 Replies)
Discussion started by: Mohanraj
3 Replies

3. Programming

Problem with socket binding - "system" call

Hi, I am having an issue with using sockets. I have a program which binds to a socket and listen on it. Later I spawn a thread to handle some function. In the new thread created I need to call a shell script which executes the specified function. Here I am using a system command to call the... (5 Replies)
Discussion started by: Janardhanbr
5 Replies

4. Programming

Problem with system("command")

Sorry, I don't speak English very well but I will try to explain my problem! If I write a C++ program and I use che system call system("command") I have this problem: If I would launch a program I do this: system("~/Agostino/program/test") and all work fine!! But if I divide this... (9 Replies)
Discussion started by: acciues
9 Replies

5. Shell Programming and Scripting

awk command to replace ";" with "|" and ""|" at diferent places in line of file

Hi, I have line in input file as below: 3G_CENTRAL;INDONESIA_(M)_TELKOMSEL;SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL My expected output for line in the file must be : "1-Radon1-cMOC_deg"|"LDIndex"|"3G_CENTRAL|INDONESIA_(M)_TELKOMSEL"|LAST|"SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL" Can someone... (7 Replies)
Discussion started by: shis100
7 Replies

6. Shell Programming and Scripting

Problem with "find" and "grep" command

I want to list all files/lines which except those which contain the pattern ' /proc/' OR ' /sys/' (mind the leading blank). In a first approach I coded: find / -exec ls -ld {} | grep -v ' /proc/| /sys/' \; > /tmp/list.txt But this doesn't work. I got an error (under Ubuntu): grep:... (5 Replies)
Discussion started by: pstein
5 Replies

7. UNIX for Dummies Questions & Answers

Using "mailx" command to read "to" and "cc" email addreses from input file

How to use "mailx" command to do e-mail reading the input file containing email address, where column 1 has name and column 2 containing “To” e-mail address and column 3 contains “cc” e-mail address to include with same email. Sample input file, email.txt Below is an sample code where... (2 Replies)
Discussion started by: asjaiswal
2 Replies

8. AIX

[Tip] Problem with rpm ("different operating system")

I have once experienced this problem without understanding what caused it but now learned thatn there is even a PMR dealing with it. Sometimes it happens that you encounter the following (rather cryptical) error message when trying to install an rpm-package: package <rpm_package_name> is for a... (1 Reply)
Discussion started by: bakunin
1 Replies

9. Shell Programming and Scripting

awk "date" and "system" command

Hello experts! I need your help please I have a file.txt of which I want to extract 3rd and 4th columns with date with the form e.g.: 2016-11-25 03:14:50and pass them to "date" command, but also append the 9th column in a file as well. So I want to execute date -d '2016-11-25 03:14:50' ... (2 Replies)
Discussion started by: phaethon
2 Replies

10. UNIX for Beginners Questions & Answers

What does "force devmap reload" as in "multipath -r" means for my system and stability of my system?

Cannot present unpresented disks back again. On a test server tried this as a solution "multipath -r" and it worked. Too worried to try it in production before I know all the information. Any info would be appreciated! Also some links to the documentation on this specific issue could help a... (1 Reply)
Discussion started by: jsteppe
1 Replies
DH_PERL(1)							     Debhelper								DH_PERL(1)

NAME
dh_perl - calculates Perl dependencies and cleans up after MakeMaker SYNOPSIS
dh_perl [debhelperoptions] [-d] [librarydirs...] DESCRIPTION
dh_perl is a debhelper program that is responsible for generating the ${perl:Depends} substitutions and adding them to substvars files. The program will look at Perl scripts and modules in your package, and will use this information to generate a dependency on perl or perlapi. The dependency will be substituted into your package's control file wherever you place the token ${perl:Depends}. dh_perl also cleans up empty directories that MakeMaker can generate when installing Perl modules. OPTIONS
-d In some specific cases you may want to depend on perl-base rather than the full perl package. If so, you can pass the -d option to make dh_perl generate a dependency on the correct base package. This is only necessary for some packages that are included in the base system. Note that this flag may cause no dependency on perl-base to be generated at all. perl-base is Essential, so its dependency can be left out, unless a versioned dependency is needed. -V By default, scripts and architecture independent modules don't depend on any specific version of perl. The -V option causes the current version of the perl (or perl-base with -d) package to be specified. library dirs If your package installs Perl modules in non-standard directories, you can make dh_perl check those directories by passing their names on the command line. It will only check the vendorlib and vendorarch directories by default. CONFORMS TO
Debian policy, version 3.8.3 Perl policy, version 1.20 SEE ALSO
debhelper(7) This program is a part of debhelper. AUTHOR
Brendan O'Dea <bod@debian.org> 8.9.0ubuntu2.1 2012-06-12 DH_PERL(1)
All times are GMT -4. The time now is 10:24 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy