124 lines
3.9 KiB
C
124 lines
3.9 KiB
C
/****************************************************************************
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* libs/libc/signal/sig_psignal.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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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#include <unistd.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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#ifdef CONFIG_FILE_STREAM
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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 stream! Write to file handle(fd == 2) directly without buffer */
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if (message != NULL)
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{
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dprintf(STDERR_FILENO, "%s: %s\n", message, strsignal(signum));
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}
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else
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{
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dprintf(STDERR_FILENO, "%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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