GRANT_FILE=MyDatabaseUSers.sql
pt-show-grants -uroot -p > ${GRANT_FILE}

GRANT_CMDS=/tmp/ShowGrantsToExport.sql
GRANT_FILE=MyDatabaseUSers.sql
MYSQL_USER=root
MYSQL_PASS=rootpassword
MYSQL_CONN="-u${MYSQL_USER} -p${MYSQL_PASS}"
SQL="SELECT CONCAT('SHOW GRANTS FOR ',QUOTE(user),'@',QUOTE(host),';')"
SQL="${SQL} FROM mysql.user WHERE user<>'' AND host<>''"
mysql ${MYSQL_CONN} -ANe"${SQL}" > ${GRANT_CMDS}
mysql ${MYSQL_CONN} < ${GRANT_CMDS} | sed 's/$/;/g' > ${GRANT_FILE}

mysql> source MyDatabaseUSers.sql

#!/bin/sh
mysql -AN <<'SQL' "$@" | mysql "$@" | sed 's/$/;/;/^Grants for /d'

SELECT CONCAT('SHOW GRANTS FOR ',QUOTE(user),'@',QUOTE(host),';')
FROM mysql.user WHERE user<>'' AND host<>''
ORDER BY user, host
;

SQL