PR_CAPBSET_READ2const
Read the calling thread's capability bounding set
Usage
#include <linux/prctl.h> /* Definition of PR_* constants */ #include <sys/prctl.h>
int prctl(PR_CAPBSET_READ, long cap);
Library
Standard C library (libc, -lc)
Overview
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).
Return value
On success, this call returns the boolean value described above. On error, -1 is returned, and errno is set to indicate the error.
Errors
- EINVAL
-
cap does not specify a valid capability.
Versions
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).
Releases
2 releases since Debian 13 (Trixie); the text changed 1 time.