hi... check out how to handle/setup a superuser group (sudo) which allows a normal user to assume the role/privs of the root/superuser for a specifically defined task. should handle your issue, if i understand what you're attempting. there should be examples on the 'net as well.. -----Original Message----- From: fedora-list-bounces@xxxxxxxxxx [mailto:fedora-list-bounces@xxxxxxxxxx]On Behalf Of wk Sent: Tuesday, December 02, 2008 1:21 AM To: fedora-list Subject: How can i call a function which is usually used by root? I want write a c program.And a common user(not in root group) will run this program. In this program,I call fread(/dev/sdc...) and fwrite(/dev/sdc),but this call will return "permission no allow".If I use the root user,will be ok. How to change to the authority to root's? I know the root's password. -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines