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libc: Implement tmpfile() function

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Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Change-Id: I00bdb42006b40bf1b9bc0bb6865b9b88b4acbb7b
This commit is contained in:
Xiang Xiao 2020-06-02 22:53:45 +08:00 committed by patacongo
parent a7174cee30
commit 9ff32427bf
3 changed files with 53 additions and 1 deletions
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1
include/stdio.h
View File

@ -210,6 +210,7 @@ int vdprintf(int fd, FAR const IPTR char *fmt, va_list ap);
/* Operations on paths */
FAR FILE *tmpfile(void);
FAR char *tmpnam(FAR char *s);
FAR char *tempnam(FAR const char *dir, FAR const char *pfx);
int remove(FAR const char *path);

2
libs/libc/stdio/Make.defs
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@ -60,7 +60,7 @@ CSRCS += lib_stdinstream.c lib_stdoutstream.c lib_stdsistream.c
CSRCS += lib_stdsostream.c lib_perror.c lib_feof.c lib_ferror.c
CSRCS += lib_rawinstream.c lib_rawoutstream.c lib_rawsistream.c
CSRCS += lib_rawsostream.c lib_remove.c lib_clearerr.c lib_scanf.c
CSRCS += lib_fscanf.c lib_vfscanf.c
CSRCS += lib_fscanf.c lib_vfscanf.c lib_tmpfile.c
endif

51
libs/libc/stdio/lib_tmpfile.c Normal file
View File

@ -0,0 +1,51 @@
/****************************************************************************
* libs/libc/stdio/lib_tmpfile.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
/****************************************************************************
* Public Functions
****************************************************************************/
FAR FILE *tmpfile(void)
{
char path[L_tmpnam] = "/tmp/XXXXXX.tmp";
FAR FILE *fp = NULL;
int fd;
fd = mkstemp(path);
if (fd >= 0)
{
unlink(fd);
fp = fdopen(fd, "w+");
if (fp == NULL)
{
close(fd);
}
}
return fp;
}