chroot() and mkdir() permissions

Asked Sep 19 '14 at 15:16

Active Sep 19 '14 at 15:28

Viewed 99 times

My C program needs to be executed as system root, because of a necessary chroot() system call.

During program execution, I need to call some mkdir(), and the resulting new directories seem to be accessible only by root, as expected.

How can I use mkdir() to create new directories accessible by every user, although the program execution as system root?

edited Sep 19 '14 at 15:28

alk

asked Sep 19 '14 at 15:16

Giacomo Marciani

`chmod()` on the created directory? – Medinoc Sep 19 '14 at 15:17
http://stackoverflow.com/questions/4568681/using-chmod-in-a-c-program – dfranca Sep 19 '14 at 15:32
Since my program needs root rights only for the chroot system call, I'd like to not need to execute it with sudo. So, I think i need to change the process capability, but...how? – Giacomo Marciani Sep 19 '14 at 16:02
So,myabe I can use the setcap command into the Makefile for the command. The problem is that, although used sudo setcap "cap_sys_chroot=p" myprogram, the chroot exits with errno EPERM – Giacomo Marciani Sep 19 '14 at 16:13
Solved adding into the Makefile the command: setcap "cap_sys_chroot=+pe" myprog – Giacomo Marciani Sep 19 '14 at 16:27

0 Answers0