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PR_CAPBSET_READ(2const) — Linux manual page

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | VERSIONS | STANDARDS | HISTORY | SEE ALSO | COLOPHON 

PR_CAPBSET_READ(2const)                          PR_CAPBSET_READ(2const)

NAME         top

       PR_CAPBSET_READ - read the calling thread's capability bounding
       set

LIBRARY         top

       Standard C library (libc, -lc)

SYNOPSIS         top

       #include <linux/prctl.h>  /* Definition of PR_* constants */
       #include <sys/prctl.h>

       int prctl(PR_CAPBSET_READ, long cap);

DESCRIPTION         top

       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         top

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

ERRORS         top

       EINVAL cap does not specify a valid capability.

VERSIONS         top

       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         top

       Linux.

HISTORY         top

       Linux 2.6.25.

SEE ALSO         top

       prctl(2), PR_CAPBSET_DROP(2const), libcap(3), cap_get_bound(3)

COLOPHON         top

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Linux man-pages 6.9.1          2024-06-02        PR_CAPBSET_READ(2const)

Pages that refer to this page: PR_CAPBSET_DROP(2const),  prctl(2)

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