79 lines
3.3 KiB
C
79 lines
3.3 KiB
C
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/****************************************************************************
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* libs/libc/unistd/lib_getrusage.c
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*
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* Copyright (C) 2019 Xiaomi Inc. All rights reserved.
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* Author: Xiang Xiao <xiaoxiang@xiaomi.com>
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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 <string.h>
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#include <errno.h>
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#include <sys/resource.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: getrusage
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*
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* Description:
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* The getrusage() function shall provide measures of the resources used
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* by the current process or its terminated and waited-for child processes.
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* If the value of the who argument is RUSAGE_SELF, information shall be
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* returned about resources used by the current process. If the value of
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* the who argument is RUSAGE_CHILDREN, information shall be returned
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* about resources used by the terminated and waited-for children of the
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* current process. If the child is never waited for (for example, if the
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* parent has SA_NOCLDWAIT set or sets SIGCHLD to SIG_IGN), the resource
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* information for the child process is discarded and not included in the
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* resource information provided by getrusage().
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*
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****************************************************************************/
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int getrusage(int who, FAR struct rusage *r_usage)
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{
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if (r_usage == NULL)
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{
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set_errno(EINVAL);
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return ERROR;
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}
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memset(r_usage, 0, sizeof(*r_usage));
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return OK;
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}
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