Home / Tips / C Tips / C: How do I print the contents of environment variables?

“Chishiki” is Japanese for “knowledge.” e-chishiki.com aims to bring software developers, information security professionals, IT executives and other IT pros a rich body of knowledge in the form of articles, interviews, tutorials and technical discussions. Our contributors are among the biggest names in the Indian IT industry and include noted authors, educators and practitioners.

C: How do I print the contents of environment variables?


How do I print the contents of environment variables?


The following program shows how to achieve this:

main( int argc, char *argv[ ], char *env[ ] )
{
   int i = 0 ;
   clrscr( ) ;
   while ( env[ i ] )
      printf ( "\n%s", env[ i++ ] ) ;
}

main( ) has the third command line argument env, which is an array of pointers to the strings. Each pointer points to an environment variable from the list of environment variables.

Comments

Log in or create a user account to comment.

On Sale From April 2008

Let Us C
8th Ed.
C programming classic & best seller. 1 million+ copies sold!

Y. Kanetkar

On Sale From April 2008

Introduction to Object Oriented Programming & C++

Y. Kanetkar

On Sale From Fall 2008

Microsoft .NET Framework: Web Application Security

Vijay Mukhi

On Sale From Nolvember 2008

Quest C++ Courseware
12+ hours of instructional audio and animated slides.

Y. Kanetkar Asang Dani

On Sale From November 2008

A Programmer's Guide to Web Application Security

Vijay Mukhi

Latest Forum Posts