Fix: race between lttng-ust getenv() and application setenv()
[lttng-ust.git] / snprintf / core.c
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1/*
2 * core.c
3 *
4 * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; only
9 * version 2.1 of the License.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
44c72f10 21#include <usterr-signal-safe.h>
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22
23volatile enum ust_loglevel ust_loglevel;
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24
25void init_usterr(void)
26{
27 char *ust_debug;
28
29 if (ust_loglevel == UST_LOGLEVEL_UNKNOWN) {
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30 /*
31 * This getenv is not part of lttng_getenv() because it
32 * is required to print ERR() performed during getenv
33 * initialization.
34 */
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35 ust_debug = getenv("LTTNG_UST_DEBUG");
36 if (ust_debug)
37 ust_loglevel = UST_LOGLEVEL_DEBUG;
38 else
39 ust_loglevel = UST_LOGLEVEL_NORMAL;
40 }
41}
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