pr_set_securebits(2const) - BetterMan

pr_set_securebits(2const)

set the "securebits" flags of the calling thread

distropkg manpages-dev@6.9.1-1dataset 2026-04-01T06:19:02Z+debian+ec4110e+mandoc:1.14.6-4

Synopsis

#include <linux/prctl.h>
  /* Definition of 
PR_*
 constants */
#include <sys/prctl.h>
int prctl(PR_SET_SECUREBITS, unsigned long 
flags
);

—

Options · 2

EINVAL	flags is not a valid value.
EPERM	op is PR_SET_SECUREBITS, and the caller does not have the CAP_SETPCAP capability, or tried to unset a "locked" flag, or tried to set a flag whose corresponding locked flag was set (see capabilities(7)).

NAME

PR_SET_SECUREBITS - set the "securebits" flags of the calling thread

Standard C library (libc, -lc)

bash

#include <linux/prctl.h>\n  /* Definition of \nPR_*\n constants */
\n#include <sys/prctl.h>

bash

int prctl(PR_SET_SECUREBITS, unsigned long \nflags\n);

Set the "securebits" flags of the calling thread to the value supplied in flags. See capabilities(7).

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

EINVAL: flags is not a valid value.
EPERM: op is PR_SET_SECUREBITS, and the caller does not have the CAP_SETPCAP capability, or tried to unset a "locked" flag, or tried to set a flag whose corresponding locked flag was set (see capabilities(7)).

Linux.

Linux 2.6.26.