/* If map is for a dynamic module which hasn't been loaded yet, attempt to load
* it. Only try to load a module once. */
static void
load_if_needed(krb5_context context, struct plugin_mapping *map,
const char *iname)
{
char *symname = NULL;
struct plugin_file_handle *handle = NULL;
void (*initvt_fn)();
if (map->module != NULL || map->dyn_path == NULL)
return;
if (asprintf(&symname, "%s_%s_initvt", iname, map->modname) < 0)
return;
if (krb5int_open_plugin(map->dyn_path, &handle, &context->err))
goto err;
if (krb5int_get_plugin_func(handle, symname, &initvt_fn, &context->err))
goto err;
free(symname);
map->dyn_handle = handle;
map->module = (krb5_plugin_initvt_fn)initvt_fn;
return;
err:
/* Clean up, and also null out map->dyn_path so we don't try again. */
if (handle != NULL)
krb5int_close_plugin(handle);
free(symname);
free(map->dyn_path);
map->dyn_path = NULL;
}
void KRB5_CALLCONV
profile_abandon(profile_t profile)
{
prf_file_t p, next;
errcode_t err;
if (!profile || profile->magic != PROF_MAGIC_PROFILE)
return;
if (profile->vt) {
if (profile->vt->cleanup)
profile->vt->cleanup(profile->cbdata);
if (profile->lib_handle) {
/* Decrement the refcount on the handle and maybe free it. */
err = k5_mutex_lock(&profile->lib_handle->lock);
if (!err && --profile->lib_handle->refcount == 0) {
krb5int_close_plugin(profile->lib_handle->plugin_handle);
k5_mutex_unlock(&profile->lib_handle->lock);
k5_mutex_destroy(&profile->lib_handle->lock);
free(profile->lib_handle);
} else if (!err)
k5_mutex_unlock(&profile->lib_handle->lock);
}
free(profile->vt);
} else {
for (p = profile->first_file; p; p = next) {
next = p->next;
profile_free_file(p);
}
}
profile->magic = 0;
free(profile);
}
static void
krb5int_plugin_file_handle_array_free (struct plugin_file_handle **harray)
{
if (harray != NULL) {
int i;
for (i = 0; harray[i] != NULL; i++) {
krb5int_close_plugin (harray[i]);
}
free (harray);
}
}
/* Release the memory associated with the mapping list entry map. */
static void
free_plugin_mapping(struct plugin_mapping *map)
{
if (map == NULL)
return;
free(map->modname);
free(map->dyn_path);
if (map->dyn_handle != NULL)
krb5int_close_plugin(map->dyn_handle);
free(map);
}
void KRB5_CALLCONV
krb5int_close_plugin_dirs (struct plugin_dir_handle *dirhandle)
{
if (dirhandle->files != NULL) {
int i;
for (i = 0; dirhandle->files[i] != NULL; i++) {
krb5int_close_plugin (dirhandle->files[i]);
}
free (dirhandle->files);
dirhandle->files = NULL;
}
}
long KRB5_CALLCONV
krb5int_open_plugin_dirs (const char * const *dirnames,
const char * const *filebases,
struct plugin_dir_handle *dirhandle,
struct errinfo *ep)
{
long err = 0;
struct plugin_file_handle **h = NULL;
int count = 0;
char **filenames = NULL;
int i;
if (!err) {
err = krb5int_plugin_file_handle_array_init (&h);
}
if (!err && (filebases != NULL)) {
err = krb5int_get_plugin_filenames (filebases, &filenames);
}
for (i = 0; !err && dirnames[i] != NULL; i++) {
size_t dirnamelen = strlen (dirnames[i]) + 1; /* '/' */
if (filenames != NULL) {
/* load plugins with names from filenames from each directory */
int j;
for (j = 0; !err && filenames[j] != NULL; j++) {
struct plugin_file_handle *handle = NULL;
char *filepath = NULL;
if (!err) {
filepath = malloc (dirnamelen + strlen (filenames[j]) + 1); /* NULL */
if (filepath == NULL) {
err = errno;
} else {
/*LINTED*/
sprintf (filepath, "%s/%s", dirnames[i], filenames[j]);
}
}
if (krb5int_open_plugin (filepath, &handle, ep) == 0) {
err = krb5int_plugin_file_handle_array_add (&h, &count, handle);
if (!err) { handle = NULL; } /* h takes ownership */
}
if (filepath != NULL) { free (filepath); }
if (handle != NULL) { krb5int_close_plugin (handle); }
}
} else {
/* load all plugins in each directory */
#ifndef _WIN32
DIR *dir = opendir (dirnames[i]);
while (dir != NULL && !err) {
struct dirent *d = NULL;
char *filepath = NULL;
struct plugin_file_handle *handle = NULL;
int len;
d = readdir (dir);
if (d == NULL) { break; }
if ((strcmp (d->d_name, ".") == 0) ||
(strcmp (d->d_name, "..") == 0)) {
continue;
}
/* Solaris Kerberos: Only open files with a .so extension */
len = NAMELEN (d);
if (len < 3 || strcmp(".so", d->d_name + len - 3 ) != 0)
continue;
if (!err) {
filepath = malloc (dirnamelen + len + 1); /* NULL */
if (filepath == NULL) {
err = errno;
} else {
/*LINTED*/
sprintf (filepath, "%s/%*s", dirnames[i], len, d->d_name);
}
}
if (!err) {
if (krb5int_open_plugin (filepath, &handle, ep) == 0) {
err = krb5int_plugin_file_handle_array_add (&h, &count, handle);
if (!err) { handle = NULL; } /* h takes ownership */
}
}
if (filepath != NULL) { free (filepath); }
if (handle != NULL) { krb5int_close_plugin (handle); }
}
if (dir != NULL) { closedir (dir); }
#else
/* Until a Windows implementation of this code is implemented */
err = ENOENT;
#endif /* _WIN32 */
}
}
if (err == ENOENT) {
err = 0; /* ran out of plugins -- do nothing */
}
if (!err) {
dirhandle->files = h;
h = NULL; /* dirhandle->files takes ownership */
}
if (filenames != NULL) { krb5int_free_plugin_filenames (filenames); }
if (h != NULL) { krb5int_plugin_file_handle_array_free (h); }
return err;
}
/* Load a dynamic profile module as specified by modspec and create a vtable
* profile for it in *ret_profile. */
static errcode_t
init_load_module(const char *modspec, profile_t *ret_profile)
{
char *modpath = NULL, *residual = NULL;
struct errinfo einfo = { 0 };
prf_lib_handle_t lib_handle = NULL;
struct plugin_file_handle *plhandle = NULL;
void *cbdata = NULL, (*fptr)();
int have_lock = 0, have_cbdata = 0;
struct profile_vtable vtable = { 1 }; /* Set minor_ver to 1, rest null. */
errcode_t err;
profile_module_init_fn initfn;
err = parse_modspec(modspec, &modpath, &residual);
if (err)
goto cleanup;
/* Allocate a reference-counted library handle container. */
lib_handle = malloc(sizeof(*lib_handle));
if (lib_handle == NULL)
goto cleanup;
err = k5_mutex_init(&lib_handle->lock);
if (err)
goto cleanup;
have_lock = 1;
/* Open the module and get its initializer. */
err = krb5int_open_plugin(modpath, &plhandle, &einfo);
if (err)
goto cleanup;
err = krb5int_get_plugin_func(plhandle, "profile_module_init", &fptr,
&einfo);
if (err == ENOENT)
err = PROF_MODULE_INVALID;
if (err)
goto cleanup;
/* Get the profile vtable and callback data pointer. */
initfn = (profile_module_init_fn)fptr;
err = (*initfn)(residual, &vtable, &cbdata);
if (err)
goto cleanup;
have_cbdata = 1;
/* Create a vtable profile with the information obtained. */
lib_handle->plugin_handle = plhandle;
lib_handle->refcount = 1;
err = init_module(&vtable, cbdata, lib_handle, ret_profile);
cleanup:
free(modpath);
free(residual);
k5_clear_error(&einfo);
if (err) {
if (have_cbdata && vtable.cleanup)
vtable.cleanup(cbdata);
if (have_lock)
k5_mutex_destroy(&lib_handle->lock);
free(lib_handle);
if (plhandle)
krb5int_close_plugin(plhandle);
}
return err;
}
long KRB5_CALLCONV
krb5int_open_plugin_dirs (const char * const *dirnames,
const char * const *filebases,
struct plugin_dir_handle *dirhandle,
struct errinfo *ep)
{
long err = 0;
struct plugin_file_handle **h = NULL;
size_t count = 0;
char **filenames = NULL;
int i;
if (!err) {
err = krb5int_plugin_file_handle_array_init (&h);
}
if (!err && (filebases != NULL)) {
err = krb5int_get_plugin_filenames (filebases, &filenames);
}
for (i = 0; !err && dirnames[i] != NULL; i++) {
if (filenames != NULL) {
/* load plugins with names from filenames from each directory */
int j;
for (j = 0; !err && filenames[j] != NULL; j++) {
struct plugin_file_handle *handle = NULL;
char *filepath = NULL;
if (!err) {
if (asprintf(&filepath, "%s/%s", dirnames[i], filenames[j]) < 0) {
filepath = NULL;
err = ENOMEM;
}
}
if (krb5int_open_plugin (filepath, &handle, ep) == 0) {
err = krb5int_plugin_file_handle_array_add (&h, &count, handle);
if (!err) { handle = NULL; } /* h takes ownership */
}
free(filepath);
if (handle != NULL) { krb5int_close_plugin (handle); }
}
} else {
/* load all plugins in each directory */
DIR *dir = opendir (dirnames[i]);
while (dir != NULL && !err) {
struct dirent *d = NULL;
char *filepath = NULL;
struct plugin_file_handle *handle = NULL;
d = readdir (dir);
if (d == NULL) { break; }
if ((strcmp (d->d_name, ".") == 0) ||
(strcmp (d->d_name, "..") == 0)) {
continue;
}
if (!err) {
int len = NAMELEN (d);
if (asprintf(&filepath, "%s/%*s", dirnames[i], len, d->d_name) < 0) {
filepath = NULL;
err = ENOMEM;
}
}
if (!err) {
if (krb5int_open_plugin (filepath, &handle, ep) == 0) {
err = krb5int_plugin_file_handle_array_add (&h, &count, handle);
if (!err) { handle = NULL; } /* h takes ownership */
}
}
free(filepath);
if (handle != NULL) { krb5int_close_plugin (handle); }
}
if (dir != NULL) { closedir (dir); }
}
}
if (err == ENOENT) {
err = 0; /* ran out of plugins -- do nothing */
}
if (!err) {
dirhandle->files = h;
h = NULL; /* dirhandle->files takes ownership */
}
if (filenames != NULL) { krb5int_free_plugin_filenames (filenames); }
if (h != NULL) { krb5int_plugin_file_handle_array_free (h); }
return err;
}
