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/*
* 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;
int mode;
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;
mode = RTLD_LAZY | RTLD_LOCAL | RTLD_NODELETE | RTLD_DEEPBIND;
#if defined (ASAN_BUILD)
/* Address sanitizer is incompatible with RTLD_DEEPBIND. */
mode &= ~RTLD_DEEPBIND;
#endif
handle = dlopen (JANSSON_SONAME, mode);
if (!handle)
goto out;
/* Now do the actual binding. */
if (!bind_symbols (handle))
goto out;
state = AVAILABLE;
out:
return state == AVAILABLE;
}
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