PR_SET_KEEPCAPS(2const)                                PR_SET_KEEPCAPS(2const)

NAME
       PR_SET_KEEPCAPS - set the state of the "keep capabilities" flag

LIBRARY
       Standard C library (libc, -lc)

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

       int prctl(PR_SET_KEEPCAPS, long state);

DESCRIPTION
       Set the state of the calling thread's "keep capabilities" flag.  The
       effect of this flag is described in capabilities(7).  state must be
       either 0L (clear the flag) or 1L (set the flag).  The "keep
       capabilities" value will be reset to 0 on subsequent calls to
       execve(2).

RETURN VALUE
       On success, 0 is returned.  On error, -1 is returned, and errno is set
       to indicate the error.

ERRORS
       EINVAL state is not a valid value.

       EPERM  The caller's SECBIT_KEEP_CAPS_LOCKED flag is set (see
              capabilities(7)).

STANDARDS
       Linux.

HISTORY
       Linux 2.2.18.

SEE ALSO
       prctl(2), PR_GET_KEEPCAPS(2const)

Linux man-pages 6.19              2026-02-08           PR_SET_KEEPCAPS(2const)