PR_CAP_AMBIENT - read or change the ambient capability set of the calling thread

       Reads  or  changes  the ambient capability set of the calling thread, according to the value of op, which
       must be one of the following:

       PR_CAP_AMBIENT_RAISEPR_CAP_AMBIENT_LOWERPR_CAP_AMBIENT_IS_SETPR_CAP_AMBIENT_CLEAR_ALL

EINVALop is not a valid value.

       Linux 4.3.

       Standard C library (libc, -lc)

       PR_CAP_AMBIENT - read or change the ambient capability set of the calling thread

       On success, a nonnegative value is returned.  On error, -1 is returned, and errno is set to indicate  the
       error.

prctl(2),  PR_CAP_AMBIENT_RAISE(2const),   PR_CAP_AMBIENT_LOWER(2const),   PR_CAP_AMBIENT_IS_SET(2const),
       PR_CAP_AMBIENT_CLEAR_ALL(2const), libcap(3), cap_get_ambient(3), cap_set_ambient(3), cap_reset_ambient(3)

Linux man-pages 6.9.1                              2024-06-01                             PR_CAP_AMBIENT(2const)

       Linux.

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

       Higher-level  interfaces  layered on top of the above operations are provided in the libcap(3) library in
       the form of cap_get_ambient(3), cap_set_ambient(3), and cap_reset_ambient(3).