Program for get environment system call

Operating Systems Lab Manual / Program for get environment system call

Program Name:

Write a Program for get environment system call

Theory

get environment system call is used to display all the system environment variables.

Program Code

#include<stdio.h> 
#include<unistd.h>
int main(int argc,char *argv[],char *envp[])
{
int i=0; 
for(i=0;envp[i]!=NULL;i++)
printf("%s\n",envp[i]);
return 0;
}

Input:

Output:
HOSTNAME=Check
LANGUAGE=en_US:en
PWD=/home
HOME=/
LANG=en_US.UTF-8
GOROOT=/usr/local/go
TERM=xterm
DISPLAY=:1
SHLVL=1
PS1=#ogdbshell#
LC_ALL=en_US.UTF-8
PATH=/opt/swift/swift-5.0-RELEASE-ubuntu14.04/usr/bin/:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
DEBIAN_FRONTEND=noninteractive
_=/script/tinit

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