NAME

       ERR_set_mark, ERR_clear_last_mark, ERR_pop_to_mark - set mark, clear mark and pop errors
       until mark

SYNOPSIS

        #include <openssl/err.h>

        int ERR_set_mark(void);
        int ERR_pop_to_mark(void);
        int ERR_clear_last_mark(void);

DESCRIPTION

       ERR_set_mark() sets a mark on the current topmost error record if there is one.

       ERR_pop_to_mark() will pop the top of the error stack until a mark is found.  The mark is
       then removed.  If there is no mark, the whole stack is removed.

       ERR_clear_last_mark() removes the last mark added if there is one.

RETURN VALUES

       ERR_set_mark() returns 0 if the error stack is empty, otherwise 1.

       ERR_clear_last_mark() and ERR_pop_to_mark() return 0 if there was no mark in the error
       stack, which implies that the stack became empty, otherwise 1.

COPYRIGHT

       Copyright 2003-2021 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (the "License").  You may not use this file except
       in compliance with the License.  You can obtain a copy in the file LICENSE in the source
       distribution or at <https://www.openssl.org/source/license.html>.