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Merge branch 'bugfix/read_eof_no_vfs_4.4' into 'release/v4.4'

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newlib: fix return value of no-VFS _read_r if nothing received (v4.4)

See merge request espressif/esp-idf!18160
This commit is contained in:
Ivan Grokhotkov 2022-05-23 17:53:47 +08:00
commit 064148212b
1 changed files with 9 additions and 13 deletions
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22
components/newlib/syscalls.c
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@ -1,16 +1,8 @@
// Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD
//
// Licensed 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.
/*
* SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdbool.h>
#include <stdlib.h>
@ -59,6 +51,10 @@ ssize_t _read_r_console(struct _reent *r, int fd, void * data, size_t size)
break;
}
}
if (received == 0) {
errno = EWOULDBLOCK;
return -1;
}
return received;
}
__errno_r(r) = EBADF;