53 lines
2.1 KiB
C
53 lines
2.1 KiB
C
/****************************************************************************
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* libs/libc/stdlib/lib_getprogname.c
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*
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* SPDX-License-Identifier: Apache-2.0
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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 <nuttx/config.h>
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#include <stdlib.h>
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#include <nuttx/sched.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: getprogname
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*
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* Note that previous impl returns address in the stack of main thread when
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* used from a pthread, that is dangerous as main thread may end earlier.
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****************************************************************************/
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FAR const char *getprogname(void)
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{
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struct stackinfo_s si;
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FAR struct tls_info_s *ti = tls_get_info();
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uintptr_t ret = ti ? (uintptr_t)ti + ti->tl_size : 0;
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int rc = nxsched_get_stackinfo(0, &si);
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return (rc >= 0 && ret && ((uintptr_t)si.stack_base_ptr) > ret) ?
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((FAR char **)ret)[0] : NULL;
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}
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