envp" -- C Language" "

Argument passed to main() 

cchhaarr **eennvvpp[[]];;
envp is an abbreviation for environmental parameter. It is the traditional name for a pointer to an array of string pointers passed to a C program's main function, and is by convention the third argument passed to main.

Example

The following example demonstrates envp, argc, and argv. 
#include <stdio.h>

main(argc, argv, envp)
int argc;                /* Number of args */
char *argv[];            /* Argument ptr array */
char *envp[];            /* Environment ptr array */
{
    int a;

    printf("The command name (argv[0]) is %s\n", argv[0]);
    printf("There are %d arguments:\n", argc-1);
    for (a=1; a<argc; a++)
                         printf("\targument %2d:\t%s\n", a, argv[a]);

    printf("The environment is as follows:\n");
    a = 0;
    while (envp[a] != NULL)
                         printf("\t%s\n", envp[a++]);
}

See Also