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-rw-r--r--cpukit/posix/src/psxtimercreate.c56
1 files changed, 51 insertions, 5 deletions
diff --git a/cpukit/posix/src/psxtimercreate.c b/cpukit/posix/src/psxtimercreate.c
index 2b5a10140f..907da01836 100644
--- a/cpukit/posix/src/psxtimercreate.c
+++ b/cpukit/posix/src/psxtimercreate.c
@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
/**
* @file
*
@@ -12,9 +14,26 @@
* COPYRIGHT (c) 1989-2007.
* On-Line Applications Research Corporation (OAR).
*
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rtems.org/license/LICENSE.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
@@ -32,6 +51,31 @@
#include <rtems/seterr.h>
#include <rtems/sysinit.h>
+RTEMS_WEAK int _POSIX_Timer_Is_allowed(
+ clockid_t clock_id
+)
+{
+ int rc = 0;
+
+ /*
+ * Allow timer_create(CLOCK_REALTIME. ...) per POSIX by default
+ * on CLOCK_REALTIME or CLOCK_MONOTONIC.
+ *
+ * But per the FACE Technical Standard, POSIX timers should not be
+ * allowed on CLOCK_REALTIME for safety reasons. If the application
+ * configures that it wants the FACE behavior, then this method
+ * is overridden by <rtems/confdefs/timer.h>.
+ */
+
+ if ( clock_id != CLOCK_REALTIME ) {
+ if ( clock_id != CLOCK_MONOTONIC ) {
+ rc = EINVAL;
+ }
+ }
+
+ return rc;
+}
+
int timer_create(
clockid_t clock_id,
struct sigevent *__restrict evp,
@@ -39,9 +83,11 @@ int timer_create(
)
{
POSIX_Timer_Control *ptimer;
+ int rc;
- if ( clock_id != CLOCK_REALTIME && clock_id != CLOCK_MONOTONIC )
- rtems_set_errno_and_return_minus_one( EINVAL );
+ rc = _POSIX_Timer_Is_allowed( clock_id );
+ if ( rc != 0 )
+ rtems_set_errno_and_return_minus_one( rc );
if ( !timerid )
rtems_set_errno_and_return_minus_one( EINVAL );