gw-dlopen.c

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/* ====================================================================
 * The Kannel Software License, Version 1.0
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 * Copyright (c) 1998-2001 WapIT Ltd.
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/*
 * gw-dlopen.c - implement lookup for addresses in the shared libs or the same binary
 *
 *
 * Alexander Malysh 2018 for Project Kannel
 */

#include "gw-config.h"
#include "gwlib.h"

#include <dlfcn.h>


int gw_dlopen_get_symbol(const char *lib_path, const char *name, void **result)
{
    void *dl_handle, *addr;
    const char* err;

    *result = NULL;

    dl_handle = dlopen(lib_path, RTLD_NOW | RTLD_LOCAL);
    err = dlerror();
    if (NULL != err) {
        error(0, "error opening shared library `%s': %s", (lib_path == NULL ? "" : lib_path), err);
        return -1;
    }

    debug("gw_dlopen", 0, "shared library `%s' opened", (lib_path == NULL ? "" : lib_path));

    addr = dlsym(dl_handle, name);
    if (addr == NULL) {
        error(0, "error find name in shared library `%s': %s", (lib_path == NULL ? "" : lib_path), dlerror());
        dlclose(dl_handle);
        return -1;
    }
    dlclose(dl_handle);

    *result = addr;

    return 0;
}