Messages in this thread | | | Date | Sun, 17 Mar 2002 12:11:18 -0800 | From | Neil Schemenauer <> | Subject | ANN: capwrap - grant capabilities to executables |
| |
I've written a small module¹ that enables the use of Linux capabilities on filesystems that do not support them. It is similar in spirit to ELF capabilities hack² but is not specific to the ELF executable format and is implemented as separate kernel module.
To grant capabilities to an executable, a small wrapper file is created that includes the path to an executable followed a capability set written in hexadecimal. When this file is executed by the kernel, the executable is granted the specified capabilities. The wrapper file must be owned by root and have the SUID bit set.
For example, to remove the SUID bit on the ping program while retaining its functionality:
# chmod -s /bin/ping # mv /bin/ping /bin/ping_real # echo '&/bin/ping_real 2000' > /bin/ping # chmod +xs /bin/ping
Comments welcome.
Neil
¹ http://arctrix.com/nas/linux/capwrap.tar.gz ² http://atrey.karlin.mff.cuni.cz/~pavel/elfcap.html - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |