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Top Forums Programming How to read output of a shell command Post 302318604 by shamik on Friday 22nd of May 2009 01:32:37 AM
Old 05-22-2009
Power How to read output of a shell command

Hello All,

I have a an application written in C and runing on Red Hat Linux.

In my code I have written a command that is fired on the linux shell by using system() function call.

Now I need to read the output of this command in my c program and assign it to a variable.

Can anyone please tell how do i do so ?


Thanks and Regards,
Shamik.
 

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RHNREG_KS(8)							   Red Hat, Inc.						      RHNREG_KS(8)

NAME
rhnreg_ks - A program for non interactively registering systems to Spacewalk Server, Red Hat Satellite or Red Hat Network Classic. SYNOPSIS
rhnreg_ks [options] DESCRIPTION
rhnreg_ks is a utility for registering a system with the "Spacewalk Server", "Red Hat Satellite" or "Red Hat Network Classic". It is designed to be used in a non-interactive environment (a kickstart style install, for example). All the information can be specified on the command line or stdin. OPTIONS
--profilename Specify the profile name that should be used as an identifier for the system in Spacewalk Server, Red Hat Satellite or Red Hat Net- work Classic --username The username to register the system with under Spacewalk Server, Red Hat Satellite or Red Hat Network Classic. This can be an exist- ing Spacewalk, Red Hat Satellite or Red Hat Network Classic username, or a new username. --password The password associated with the username specified with the --username option. This is an unencrypted password. --activationkey Specify/use a serial number to associate with the system. This is optional, but activation keys can really simplify the registration process. Learn more about activation keys in the online RHN documentation. --contactinfo This option has been deprecated. Please login to the server web user interface and update your contactinfo. --nohardware Do not probe or upload any hardware information. --nopackages Do not profile or upload any package information. --novirtinfo Do not profile or upload any virtualization information. --norhnsd Do not start rhnsd after completion. --force Register the system even if it has already been registered. --version Show the version of rhnreg_ks. --proxy Specify a HTTP proxy to use. --proxyUser Specify a username to use with an authenticated HTTP proxy. --proxyPassword Specify a password to use with an authenticated HTTP proxy. --sslCACert Specify a path to a SSL CA certificate to use. --serverUrl Specify a URL to as the server. -h, --help Show a help message and exit. FILES
/etc/sysconfig/rhn/systemid The digital server ID for this machine if the system has been registered onto "Spacewalk Server", "Red Hat Satellite" or "Red Hat Network Classic". This file does not exist otherwise. /etc/sysconfig/rhn/up2date The common configuration file used by RHN client programs. EXAMPLES
Register a new system to Spacewalk / Red Hat Satellite / Red Hat Network Classic: rhnreg_ks --profilename "example_profile_name" --username "someexampleuser" --password "foobar" SEE ALSO
rhn_check(8), rhn_register(8), rhnsd(8), rhn-profile-sync(8), rhnplugin(8), up2date(5). AUTHORS
See the AUTHORS file included with this software. This manual page was written by Adrian Likins <alikins@redhat.com> and James Bowes <jbowes@redhat.com> BUGS
Report bugs to <http://bugzilla.redhat.com>. COPYRIGHT
Copyright (C) 1999-2011 Red Hat, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. Linux 2011 February 4 RHNREG_KS(8)
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