=pod
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=head1 NAME
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ERR_set_mark, ERR_pop_to_mark - set marks and pop errors until mark
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=head1 SYNOPSIS
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#include <openssl/err.h>
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int ERR_set_mark(void);
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int ERR_pop_to_mark(void);
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=head1 DESCRIPTION
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ERR_set_mark() sets a mark on the current topmost error record if there
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is one.
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ERR_pop_to_mark() will pop the top of the error stack until a mark is found.
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The mark is then removed. If there is no mark, the whole stack is removed.
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=head1 RETURN VALUES
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ERR_set_mark() returns 0 if the error stack is empty, otherwise 1.
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ERR_pop_to_mark() returns 0 if there was no mark in the error stack, which
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implies that the stack became empty, otherwise 1.
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=head1 SEE ALSO
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L<err(3)|err(3)>
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=head1 HISTORY
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ERR_set_mark() and ERR_pop_to_mark() were added in OpenSSL 0.9.8.
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=cut
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