lcthw/ex29.c at master · AliNisarAhmed/lcthw

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#include "dbg.h"

#include <dlfcn.h>

#include <stdio.h>

typedef int (*lib_function)(const char *data);

int main(int argc, char *argv[]) {

int rc = 0;

check(argc == 4, "USAGE: ex29 libex29.so function data");

char *lib_file = argv[1];

char *func_to_run = argv[2];

char *data = argv[3];

4042

void *lib = dlopen(lib_file, RTLD_NOW);

check(lib != NULL, "Failed to open the library %s: %s", lib_file, dlerror());

lib_function func = dlsym(lib, func_to_run);

check(func != NULL, "Did not find %s function in the library %s: %s",

func_to_run, lib_file, dlerror());

rc = func(data);

check(rc == 0, "Function %s return %d for data: %s", func_to_run, rc, data);

rc = dlclose(lib);

check(rc == 0, "Failed to close %s", lib_file);

return 0;

error:

return 1;

}