problem regarding system() call using c in Nagios

[kayalvizhibala]

Hi,
I am using system() call in c program as a plugin for nagios, to get details from weblogic server MBean as follows
system"(java snmpwlk -v v1 public@medrec 127.0.0.1 .1.3.6.4.1.730.625 > /usr/local/nagios/libexec/output")
It executed and created output file.But output file have no data.
please guide me..

[ypankaj]

Try with this, it will redirect all...

system"(java snmpwlk -v v1 public@medrec 127.0.0.1 .1.3.6.4.1.730.625 &> /usr/local/nagios/libexec/output")

[kayalvizhibala]

Hi,
Thanks for ur reply. I tried that using &> symbols in the java snmpwalk command.
I used the putenv() function to set the environment variables. After that I call the java snmpwalk utility as follows:

system("java snmpget -v v1 -c public@medrec -p 161 127.0.0.1 .1.3.6.1.4.1.140.625.730.1.45.32.99.98.97.57.53.49 .97.52.57.98.101.101.97.51.97.102.99.99.48.48.101. 100.97.56.101.97.101.49.97.102.101.56 &> /usr/local/nagios/libexec/output");

As for reference I have attatched my code here:

#include "stdio.h"
int main()
{
FILE * fin;
char * temp,*ptr,c;
char value[1000];
int i=0;
putenv("CLASSPATH=/root/bea9.0/patch_weblogic901/profiles/default/sys_manifest_classpath/weblogic_patch.jar:/root/bea9.0/jrockit90_150_03/lib/tools.jar:/root/bea9.0/weblogic90/server/lib/weblogic_sp.jar:/root/bea9.0/weblogic90/server/lib/weblogic.jar");


putenv("PATH=/root/bea9.0/weblogic90/server/bin:/root/bea9.0/jrockit90_150_03/jre/bin:/root/bea9.0/jrockit90_150_03/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/root/bin");

putenv("export PATH CLASSPATH");

system("java snmpget -v v1 -c public@medrec -p 161 127.0.0.1 .1.3.6.1.4.1.140.625.730.1.45.32.99.98.97.57.53.49 .97.52.57.98.101.101.97.51.97.102.99.99.48.48.101. 100.97.56.101.97.101.49.97.102.101.56 &> /usr/local/nagios/libexec/output");

fin=fopen("/usr/local/nagios/libexec/output.txt","r");
value[i]=fgetc(fin);
while(value[i]!=EOF)
{
// printf("%c",value[i]);
i++;
value[i]=fgetc(fin);
}
close(fin);
i=0;
printf("welcome");
while(i<9)
{
printf("%c",value[i]);
i++;
}
system("rm output --force");
return(1);
}

WHile I'm running it independently it returns the desired results. But after adding it to nagios, it doesn't return the results. It just creates a "output" file as empty file. That file doen't have any data. I give the executable permission for that file to nagios. I'm also defined in commands.cfg and services..cfg.
While starting Nagios, It creates a empty file in the name "output". The nagios doesn't write any value to that file. Please help us to return the results to the "output" file through Nagios.