PR_CAPBSET_READ(2const) PR_CAPBSET_READ(2const)
NAME
PR_CAPBSET_READ - read the calling thread's capability bounding set
LIBRARY
Standard C library (libc, -lc)
SYNOPSIS
#include <linux/prctl.h> /* Definition of PR_* constants */
#include <sys/prctl.h>
int prctl(PR_CAPBSET_READ, long cap);
DESCRIPTION
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 er-
ror, -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).
STANDARDS
Linux.
HISTORY
Linux 2.6.25.
SEE ALSO
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)
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