debian man page for personality

PERSONALITY(2)						     Linux Programmer's Manual						    PERSONALITY(2)

NAME
       personality - set the process execution domain

SYNOPSIS
       #include <sys/personality.h>

       int personality(unsigned long persona);

DESCRIPTION
       Linux  supports	different  execution domains, or personalities, for each process.  Among other things, execution domains tell Linux how to
       map signal numbers into signal actions.	The execution domain system allows Linux to provide limited support for  binaries  compiled  under
       other UNIX-like operating systems.

       This  function  will  return the current personality() when persona equals 0xffffffff.  Otherwise, it will make the execution domain refer-
       enced by persona the new execution domain of the calling process.

RETURN VALUE
       On success, the previous persona is returned.  On error, -1 is returned, and errno is set appropriately.

ERRORS
       EINVAL The kernel was unable to change the personality.

CONFORMING TO
       personality() is Linux-specific and should not be used in programs intended to be portable.

COLOPHON
       This page is part of release 3.44 of the Linux man-pages project.  A description of the project, and information about reporting bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    2003-01-01							    PERSONALITY(2)