75 lines
2.6 KiB
C
75 lines
2.6 KiB
C
/****************************************************************************
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* libs/libc/stdio/lib_perror.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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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* POSIX requires that perror provide its output on stderr. This option may
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* be defined, however, to provide perror output that is serialized with
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* other stdout messages.
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*/
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#ifdef CONFIG_LIBC_PERROR_STDOUT
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# define PERROR_STREAM stdout
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# define PERROR_FILENO STDOUT_FILENO
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#else
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# define PERROR_STREAM stderr
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# define PERROR_FILENO STDERR_FILENO
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: perror
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****************************************************************************/
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void perror(FAR const char *s)
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{
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/* If strerror() is not enabled, then just print the error number */
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#ifdef CONFIG_LIBC_STRERROR
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# ifdef CONFIG_FILE_STREAM
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fprintf(PERROR_STREAM, "%s: %s\n", s, strerror(get_errno()));
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# else
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dprintf(PERROR_FILENO, "%s: %s\n", s, strerror(get_errno()));
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# endif
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#else
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# ifdef CONFIG_FILE_STREAM
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fprintf(PERROR_STREAM, "%s: Error %d\n", s, get_errno());
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# else
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dprintf(PERROR_FILENO, "%s: Error %d\n", s, get_errno());
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# endif
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#endif
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}
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