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# ==== Purpose ====
#
# Write the contents of $write_var to file $write_to_file.
#
# ==== Usage ====
#
# --let $write_var = <value>
# --let $write_to_file = [<file>|GENERATE]
# --source include/write_var_to_file.inc
#
# Parameters:
#
# $write_var
# This mysqltest variable is written to the file. The variable is
# evaluated in sql 'string' context, so escapes like \n are
# interpolated.
#
# $write_to_file
# The variable is written to this file. If this is set to
# GENERATE, a unique filename is generated (based on UUID()), and
# the filename is saved in $write_to_file so that it can be
# retrieved later.
#
# ==== Implementation ====
#
# We can't use mysqltest's write_file because it does not evaluate
# variables. We can't use '--exec echo $write_var > $write_file'
# because it will use \n\r line terminator under windows. So the only
# working way is mysql's SELECT INTO DUMPFILE, which is subject to
# @@secure_file_priv. That makes this more complex than you might
# expect.
if (!$write_to_file)
{
--die You must set the mysqltest variable \$write_to_file before you source include/write_var_to_file.inc
}
if ($write_to_file == 'GENERATE')
{
--let $_wvtf_suffix= `SELECT UUID()`
--let $write_to_file= $MYSQLTEST_VARDIR/tmp/_var_file_$_wvtf_suffix.inc
}
--error 0,1
--remove_file $write_to_file
if (`SELECT LENGTH(@@secure_file_priv) > 0`)
{
--let $_wvtf_secure_file_priv= `SELECT @@secure_file_priv`
--let $_wvtf_suffix= `SELECT UUID()`
--let $_wvtf_tmp_file= $_wvtf_secure_file_priv/_wvtf_$_wvtf_suffix
--eval SELECT '$write_var' INTO DUMPFILE '$_wvtf_tmp_file'
--copy_file $_wvtf_tmp_file $write_to_file
--remove_file $_wvtf_tmp_file
}
if (`SELECT LENGTH(@@secure_file_priv) = 0`)
{
--eval SELECT '$write_var' INTO DUMPFILE '$write_to_file'
}