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