How to run binary as root or su

[gwang09]

Hello,

I have a binary (generated from a c program) that performs ioctl(...) system call, which requires root or sudo rights. How can this binary be run by a normal user without entering su password? Thanks.

George

[gerard4143]

try this link

Setuid Program Example - The GNU C Library

[andrewdodd13]

Hello,

I have a binary (generated from a c program) that performs ioctl(...) system call, which requires root or sudo rights. How can this binary be run by a normal user without entering su password? Thanks.

George

If a program could elevate itself to root level without a password it'd defeat the whole point of user-level security, no?

[gerard4143]

If a program could elevate itself to root level without a password it'd defeat the whole point of user-level security, no?

Yes and no...some programs by their very nature require users to access root level

[andrewdodd13]

Yes and no...some programs by their very nature require users to access root level

Of course, but without a password?

[gerard4143]

Of course, but without a password?

Yes..an example would be a login program..

[andrewdodd13]

Yes..an example would be a login program..

These daemons I guess you're thinking of are launched during startup while the system is still in single-user mode, and run based on a configuration file which only root should be able to edit. A non-root user could run these programs but in general they would still be run as that users PID.

Generally the best way to do what you're wanting to do is in fact write an abstraction daemon which runs at start-up and provides a mechanism for reporting the result of the call to the program. This still requires root to install the program, unless a non-priviledged user has access to the init scripts (insecure).