Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
getenvaddr.c - find environment variable addresses
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main(int argc, char *argv[]) {
char *ptr;
if(argc < 3) {
printf("Usage: %s <environment variable> <target program name>\n", argv[0]);
exit(0);
}
ptr = getenv(argv[1]); /* get env var location */
ptr += (strlen(argv[0]) - strlen(argv[2]))*2; /* adjust for program name */
printf("%s will be at %p\n", argv[1], ptr);
}
@montarcannon

This comment has been minimized.

Copy link

@montarcannon montarcannon commented Jul 17, 2020

thanks

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.