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libs/libc/unistd: add getpgrp function

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1. the getpgrp function can help to pass the ltp/open_posix_teststuite/killpg related testcases
2. Nuttx do not support process group, so we use getpid to implement this
3. the implementation are referred to: https://pubs.opengroup.org/onlinepubs/9699919799/functions/getpgrp.html

Signed-off-by: guoshichao <guoshichao@xiaomi.com>
This commit is contained in:
guoshichao 2023-06-07 14:35:07 +08:00 committed by Xiang Xiao
parent cbe4edd479
commit 3821ad514d
3 changed files with 50 additions and 1 deletions
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1
include/unistd.h
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@ -306,6 +306,7 @@ extern "C"
pid_t vfork(void);
pid_t getpid(void);
pid_t getpgrp(void);
pid_t gettid(void);
pid_t getppid(void);
void _exit(int status) noreturn_function;

2
libs/libc/unistd/Make.defs
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@ -30,7 +30,7 @@ CSRCS += lib_setreuid.c lib_setregid.c lib_getrusage.c lib_utime.c lib_utimes.c
CSRCS += lib_setrlimit.c lib_getrlimit.c lib_setpriority.c lib_getpriority.c
CSRCS += lib_futimes.c lib_lutimes.c lib_gethostname.c lib_sethostname.c
CSRCS += lib_fchownat.c lib_linkat.c lib_readlinkat.c lib_symlinkat.c
CSRCS += lib_unlinkat.c
CSRCS += lib_unlinkat.c lib_getpgrp.c
ifneq ($(CONFIG_SCHED_USER_IDENTITY),y)
CSRCS += lib_setuid.c lib_setgid.c lib_getuid.c lib_getgid.c

48
libs/libc/unistd/lib_getpgrp.c Normal file
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@ -0,0 +1,48 @@
/****************************************************************************
* libs/libc/unistd/lib_getpgrp.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 <unistd.h>
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: getpgrp
*
* Description:
* Get the Process Group ID of the currently executing task.
*
* Input parameters:
* None
*
* Returned Value:
* The getpgrp will return current process ID directly
*
****************************************************************************/
pid_t getpgrp(void)
{
return getpid();
}