54eabf9616
https://pubs.opengroup.org/onlinepubs/007904875/functions/mknod.html Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
97 lines
3.1 KiB
C
97 lines
3.1 KiB
C
/****************************************************************************
|
|
* libs/libc/misc/lib_mknod.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 <errno.h>
|
|
#include <fcntl.h>
|
|
#include <sys/stat.h>
|
|
#include <unistd.h>
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: mknod
|
|
*
|
|
* Description:
|
|
* The mknod() function shall create a new file named by the pathname to
|
|
* which the argument path points.
|
|
*
|
|
* The file type for path is OR'ed into the mode argument, and the
|
|
* application shall select one of the following symbolic constants:
|
|
*
|
|
* S_IFIFO FIFO-special
|
|
* S_IFCHR Character-special (non-portable)
|
|
* S_IFDIR Directory (non-portable)
|
|
* S_IFBLK Block-special (non-portable)
|
|
* S_IFREG Regular (non-portable)
|
|
*
|
|
* The only portable use of mknod() is to create a FIFO-special file.
|
|
* If mode is not S_IFIFO or dev is not 0, the behavior of mknod() is
|
|
* unspecified.
|
|
*
|
|
* The permissions for the new file are OR'ed into the mode argument.
|
|
*
|
|
* Input Parameters:
|
|
* pathname - The full path to node.
|
|
* mode - File type and permission
|
|
*
|
|
* Returned Value:
|
|
* 0 is returned on success; otherwise, -1 is returned with errno set
|
|
* appropriately.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int mknod(FAR const char *path, mode_t mode, dev_t dev)
|
|
{
|
|
int ret = -1;
|
|
|
|
switch (mode & S_IFMT)
|
|
{
|
|
#if defined(CONFIG_PIPES) && CONFIG_DEV_FIFO_SIZE > 0
|
|
case S_IFIFO:
|
|
ret = mkfifo(path, mode & ~S_IFMT);
|
|
break;
|
|
#endif
|
|
|
|
case S_IFDIR:
|
|
ret = mkdir(path, mode & ~S_IFMT);
|
|
break;
|
|
|
|
case S_IFREG:
|
|
ret = creat(path, mode & ~S_IFMT);
|
|
if (ret >= 0)
|
|
{
|
|
ret = close(ret);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
set_errno(EINVAL);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|