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
96 lines
3.9 KiB
C
96 lines
3.9 KiB
C
/****************************************************************************
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* libs/libc/stdio/lib_tmpnam.c
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*
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* Copyright (C) 2014 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 <stdlib.h>
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#include <errno.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: tmpnam
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*
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* Description:
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* The tmpnam() function generates a string that is a valid filename and
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* that is not the same as the name of an existing file. The function is
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* potentially capable of generating TMP_MAX different strings, but any or
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* all of them may already be in use by existing files and thus not be
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* suitable return values.
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*
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* The tmpnam() function generates a different string each time it is
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* called from the same process, up to {TMP_MAX} times. If it is called
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* more than {TMP_MAX} times, the behavior is implementation-defined.
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*
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* Returned Value:
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* Upon successful completion, tmpnam() returns a pointer to a string. I
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* no suitable string can be generated, the tmpnam() function will
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* return a null pointer.
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*
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* If the argument s is a null pointer, tmpnam() will leave its result
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* in an internal static object and return a pointer to that object.
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* Subsequent calls to tmpnam() may modify the same object. If the
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* argument s is not a null pointer, it is presumed to point to an
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* array of at least L_tmpnam chars; tmpnam() will write its result in
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* that array and will return the argument as its value.
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*
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****************************************************************************/
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FAR char *tmpnam(FAR char *s)
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{
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static char path[L_tmpnam];
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int ret;
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if (s == NULL)
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{
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s = path;
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}
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snprintf(s, L_tmpnam, "%s/XXXXXX.tmp", P_tmpdir);
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ret = mktemp(s);
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return (ret == OK) ? s : NULL;
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}
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