84576ce861
We already define _GNU_SOURCE in "config.h", depending on configure checks. Also, we always should first include "config.h" (which means to first include "nm-default.h"). Also, we don't need the entire <link.h>, <dlfcn.h> suffices.
117 lines
3.2 KiB
C
117 lines
3.2 KiB
C
/*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Copyright 2017, 2018 Red Hat, Inc.
|
|
*/
|
|
|
|
#include "nm-default.h"
|
|
|
|
#define NM_JANSSON_C
|
|
#include "nm-json.h"
|
|
|
|
#include <dlfcn.h>
|
|
|
|
void *_nm_jansson_json_object_iter_value;
|
|
void *_nm_jansson_json_object_key_to_iter;
|
|
void *_nm_jansson_json_integer;
|
|
void *_nm_jansson_json_object_del;
|
|
void *_nm_jansson_json_array_get;
|
|
void *_nm_jansson_json_array_size;
|
|
void *_nm_jansson_json_array_append_new;
|
|
void *_nm_jansson_json_string;
|
|
void *_nm_jansson_json_object_iter_next;
|
|
void *_nm_jansson_json_loads;
|
|
void *_nm_jansson_json_dumps;
|
|
void *_nm_jansson_json_object_iter_key;
|
|
void *_nm_jansson_json_object;
|
|
void *_nm_jansson_json_object_get;
|
|
void *_nm_jansson_json_array;
|
|
void *_nm_jansson_json_false;
|
|
void *_nm_jansson_json_delete;
|
|
void *_nm_jansson_json_true;
|
|
void *_nm_jansson_json_object_size;
|
|
void *_nm_jansson_json_object_set_new;
|
|
void *_nm_jansson_json_object_iter;
|
|
void *_nm_jansson_json_integer_value;
|
|
void *_nm_jansson_json_string_value;
|
|
|
|
#define TRY_BIND_SYMBOL(symbol) \
|
|
G_STMT_START { \
|
|
void *sym = dlsym (handle, #symbol); \
|
|
if (_nm_jansson_ ## symbol && sym != _nm_jansson_ ## symbol) \
|
|
return FALSE; \
|
|
_nm_jansson_ ## symbol = sym; \
|
|
} G_STMT_END
|
|
|
|
static gboolean
|
|
bind_symbols (void *handle)
|
|
{
|
|
TRY_BIND_SYMBOL (json_object_iter_value);
|
|
TRY_BIND_SYMBOL (json_object_key_to_iter);
|
|
TRY_BIND_SYMBOL (json_integer);
|
|
TRY_BIND_SYMBOL (json_object_del);
|
|
TRY_BIND_SYMBOL (json_array_get);
|
|
TRY_BIND_SYMBOL (json_array_size);
|
|
TRY_BIND_SYMBOL (json_array_append_new);
|
|
TRY_BIND_SYMBOL (json_string);
|
|
TRY_BIND_SYMBOL (json_object_iter_next);
|
|
TRY_BIND_SYMBOL (json_loads);
|
|
TRY_BIND_SYMBOL (json_dumps);
|
|
TRY_BIND_SYMBOL (json_object_iter_key);
|
|
TRY_BIND_SYMBOL (json_object);
|
|
TRY_BIND_SYMBOL (json_object_get);
|
|
TRY_BIND_SYMBOL (json_array);
|
|
TRY_BIND_SYMBOL (json_false);
|
|
TRY_BIND_SYMBOL (json_delete);
|
|
TRY_BIND_SYMBOL (json_true);
|
|
TRY_BIND_SYMBOL (json_object_size);
|
|
TRY_BIND_SYMBOL (json_object_set_new);
|
|
TRY_BIND_SYMBOL (json_object_iter);
|
|
TRY_BIND_SYMBOL (json_integer_value);
|
|
TRY_BIND_SYMBOL (json_string_value);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean
|
|
nm_jansson_load (void)
|
|
{
|
|
static enum {
|
|
UNKNOWN,
|
|
AVAILABLE,
|
|
MISSING,
|
|
} state = UNKNOWN;
|
|
void *handle;
|
|
|
|
if (G_LIKELY (state != UNKNOWN))
|
|
goto out;
|
|
|
|
/* First just resolve the symbols to see if there's a conflict already. */
|
|
if (!bind_symbols (RTLD_DEFAULT))
|
|
goto out;
|
|
|
|
handle = dlopen (JANSSON_SONAME, RTLD_LAZY | RTLD_LOCAL | RTLD_NODELETE | RTLD_DEEPBIND);
|
|
if (!handle)
|
|
goto out;
|
|
|
|
/* Now do the actual binding. */
|
|
if (!bind_symbols (handle))
|
|
goto out;
|
|
|
|
state = AVAILABLE;
|
|
out:
|
|
return state == AVAILABLE;
|
|
}
|