PR_CAPBSET_READ - read the calling thread's capability bounding set

Return 1 if the capability specified in cap is in the calling thread's capability bounding set, or 0 if it is not. The capability constants are defined in <linux/capability.h>. The capability bounding set dictates whether the process can receive the capability through a file's permitted capability set on a subsequent call to execve(2).

EINVALcap does not specify a valid capability.

Linux 2.6.25.

Standard C library (libc, -lc)

PR_CAPBSET_READ - read the calling thread's capability bounding set

On success, this call returns the boolean value described above. On error, -1 is returned, and errno is set to indicate the error.

prctl(2), PR_CAPBSET_DROP(2const), libcap(3), cap_get_bound(3) Linux man-pages 6.9.1 2024-06-02 PR_CAPBSET_READ(2const)

Linux.

#include<linux/prctl.h> /* Definition of PR_* constants */ #include<sys/prctl.h>intprctl(PR_CAPBSET_READ,longcap);

A higher-level interface layered on top of this operation is provided in the libcap(3) library in the form of cap_get_bound(3).