6a3c2aded6
* Simplify EINTR/ECANCEL error handling 1. Add semaphore uninterruptible wait function 2 .Replace semaphore wait loop with a single uninterruptible wait 3. Replace all sem_xxx to nxsem_xxx * Unify the void cast usage 1. Remove void cast for function because many place ignore the returned value witout cast 2. Replace void cast for variable with UNUSED macro
138 lines
4.6 KiB
C
138 lines
4.6 KiB
C
/****************************************************************************
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* libs/libc/signal/sig_psignal.c
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*
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* Copyright (C) 2018 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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/* Uses streams... not available to kernel code */
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#ifndef __KERNEL__
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: psignal
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*
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* Description:
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* The psignal() functions will write a language-dependent message
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* associated with a signal number to the standard error stream as
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* follows:
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*
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* First, if message is not a null pointer and is not the empty string,
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* the string pointed to by the message argument will be written,
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* followed by a colon and a space.
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*
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* Then the signal description string associated with signum will be
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* written, followed by a newline.
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*
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* Returned Value
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* None. The errno value is never set in this implementation.
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*
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****************************************************************************/
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void psignal(int signum, FAR const char *message)
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{
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#if CONFIG_NFILE_STREAMS > 0
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/* For now, just a brainless write to stderr (fd == 2). C buffered I/O is
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* used!
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*/
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if (message != NULL)
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{
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fprintf(stderr, "%s: %s\n", message, strsignal(signum));
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}
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else
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{
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fprintf(stderr, "%s\n", strsignal(signum));
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}
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#else
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/* No stderr! Write to whatever alternative console is available */
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if (message != NULL)
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{
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printf("%s: %s\n", message, strsignal(signum));
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}
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else
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{
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printf("%s\n", strsignal(signum));
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}
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#endif
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}
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/****************************************************************************
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* Name: psiginfo
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*
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* Description:
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* The psiginfo() functions will write a language-dependent message
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* associated with a signal number to the standard error stream as
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* follows:
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*
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* First, if message is not a null pointer and is not the empty string,
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* the string pointed to by the message argument will be written,
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* followed by a colon and a space.
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*
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* Then the signal description string associated with the signal
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* indicated by pinfo will be written, followed by a newline.
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*
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* Returned Value
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* None. Since no value is returned, an application wishing to check for
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* error situations should set errno to 0, then call psiginfo() then check
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* errno.
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*
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****************************************************************************/
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void psiginfo(FAR const siginfo_t *pinfo, FAR const char *message)
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{
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if (pinfo == NULL)
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{
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set_errno(EINVAL);
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}
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else
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{
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psignal(pinfo->si_signo, message);
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}
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}
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#endif /* !__KERNEL__ */
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