4067a9f057
From: int mktemp(FAR char *path_template); To: FAR char *mktemp(FAR char *path_template); See the reference here: https://pubs.opengroup.org/onlinepubs/009695399/functions/mktemp.html Signed-off-by: chao.an <anchao@xiaomi.com>
74 lines
2.9 KiB
C
74 lines
2.9 KiB
C
/****************************************************************************
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* libs/libc/stdlib/lib_mkstemp.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 <nuttx/compiler.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <fcntl.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: mkstemp
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*
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* Description:
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* The mkstemp() function replaces the contents of the string pointed to
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* by path_template by a unique filename, and returns a file descriptor
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* for the file open for reading and writing. The function thus prevents
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* any possible race condition between testing whether the file exists and
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* opening it for use. The string in path_template should look like a
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* filename with six trailing 'X' s; mkstemp() replaces each 'X' with a
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* character from the portable filename character set. The characters are
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* chosen such that the resulting name does not duplicate the name of an
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* existing file at the time of a call to mkstemp().
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*
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* Input Parameters:
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* path_template - The base file name that will be modified to produce
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* the unique file name. This must be a full path beginning with /tmp.
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* This function will modify only the first XXXXXX characters within
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* that full path.
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*
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* Returned Value:
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* Upon successful completion, mkstemp() returns an open file descriptor.
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* Otherwise, -1 is returned if no suitable file could be created.
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*
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****************************************************************************/
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int mkstemp(FAR char *path_template)
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{
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FAR char *path = mktemp(path_template);
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int ret = ERROR;
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if (path)
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{
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ret = open(path, O_RDWR | O_CREAT | O_EXCL, 0666);
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}
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return ret;
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}
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