static void *dlopen(const char *module_name, int how)
{
dld_create_reference("pike_module_init");
if(dld_link(module_name))
{
return (void *)strdup(module_name);
}else{
return 0;
}
}
void loadobj(string pathname)
{
int ner;
dprintf(3,"loadobj: %s\n",pathname);
ner = dld_link(pathname);
if (ner == DLD_EMULTDEFS) {
dld_perror("EMULTDEFS Error in loadobj");
} else if (ner != 0) {
dld_perror("Error in loadobj");
error("Could not load %s",pathname);
}
}
/* A function called through the vtable to open a module with this
loader. Returns an opaque representation of the newly opened
module for processing with this loader's other vtable functions. */
static lt_module
vm_open (lt_user_data loader_data LT__UNUSED, const char *filename,
lt_dladvise advise LT__UNUSED)
{
lt_module module = lt__strdup (filename);
if (module && dld_link (filename) != 0)
{
LT__SETERROR (CANNOT_OPEN);
FREE (module);
}
return module;
}
void *
pg_dlopen(char *filename)
{
static int dl_initialized = 0;
/*
* initializes the dynamic loader with the executable's pathname. (only
* needs to do this the first time pg_dlopen is called.)
*/
if (!dl_initialized)
{
if (dld_init(dld_find_executable(my_exec_path)))
return NULL;
/*
* if there are undefined symbols, we want dl to search from the
* following libraries also.
*/
dl_initialized = 1;
}
/*
* link the file, then check for undefined symbols!
*/
if (dld_link(filename))
return NULL;
/*
* If undefined symbols: try to link with the C and math libraries! This
* could be smarter, if the dynamic linker was able to handle shared libs!
*/
if (dld_undefined_sym_count > 0)
{
if (dld_link("/usr/lib/libc.a"))
{
elog(WARNING, "could not link C library");
return NULL;
}
if (dld_undefined_sym_count > 0)
{
if (dld_link("/usr/lib/libm.a"))
{
elog(WARNING, "could not link math library");
return NULL;
}
if (dld_undefined_sym_count > 0)
{
int count = dld_undefined_sym_count;
char **list = dld_list_undefined_sym();
/* list the undefined symbols, if any */
do
{
elog(WARNING, "\"%s\" is undefined", *list);
list++;
count--;
} while (count > 0);
dld_unlink_by_file(filename, 1);
return NULL;
}
}
}
return (void *) strdup(filename);
}