PR_SET_NO_NEW_PRIVS(2const)

NAME

PR_SET_NO_NEW_PRIVS - set the calling thread's no_new_privs attribute

LIBRARY

Standard C library (libc, -lc)

SYNOPSIS

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

int prctl(PR_SET_NO_NEW_PRIVS, 1L, 0L, 0L, 0L);

DESCRIPTION

Set the calling thread's no_new_privs attribute. With no_new_privs set to 1, execve(2) promises not to grant privileges to do anything that could not have been done without the execve(2) call (for example, rendering the set-user-ID and set-group-ID mode bits, and file capabilities non-functional).

Once set, the no_new_privs attribute cannot be unset. The setting of this attribute is inherited by children created by fork(2) and clone(2), and preserved across execve(2).

RETURN VALUE

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

ERRORS

EINVAL: The second argument is not equal to 1L.

FILES

/proc/pid/status: Since Linux 4.10, the value of a thread's no_new_privs attribute can be viewed via the NoNewPrivs field in this file.

STANDARDS

Linux.

HISTORY

Linux 3.5.