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/* getshlib.c - Get the address of a function in a shared library and print it
*
* Copyright (c)2003 by Peter Busser <peter@adamantix.org>
* This file has been released under the GNU Public Licence version 2 or later
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
/* OpenBSD 3.5 doesn't define RTLD_DEFAULT */
/* OpenBSD 3.6 does but it doesn't actually handle (segfaults on) RTLD_DEFAULT, sigh... */
#ifdef __OpenBSD__
#define RTLD_DEFAULT "libc.so"
#endif
int main( int argc, char *argv[] )
{
void *handle;
handle = dlopen( RTLD_DEFAULT, RTLD_LAZY );
if( handle != NULL ) {
void *sprintf;
dlerror(); /* clear any errors */
sprintf = dlsym( handle, "sprintf" );
if( dlerror() == NULL ) {
printf( "%0p\n", sprintf );
}
dlclose( handle );
}
}
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