man2/personality.2

   1 .\" Copyright (C) 1995, Thomas K. Dyas <tdyas@eden.rutgers.edu>
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  23 .\" Created   Sat Aug 21 1995     Thomas K. Dyas <tdyas@eden.rutgers.edu>
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  25 .\" typo corrected, aeb, 950825
  26 .\" added layout change from joey, 960722
  27 .\" changed prototype, documented 0xffffffff, aeb, 030101
  28 .\" Modified 2004-11-03 patch from Martin Schulze <joey@infodeom.org>
  29 .\"
  30 .TH PERSONALITY 2 2003-01-01 "Linux 2.0" "Linux Programmer's Manual"
  31 .SH NAME
  32 personality \- set the process execution domain
  33 .SH SYNOPSIS
  34 .B #include <sys/personality.h>
  35 .sp
  36 .BI "int personality(unsigned long " persona );
  37 .SH DESCRIPTION
  38 Linux supports different execution domains, or personalities, for each
  39 process. Among other things, execution domains tell Linux how to map
  40 signal numbers into signal actions. The execution domain system allows
  41 Linux to provide limited support for binaries compiled under other
  42 Unix-like operating systems.
  43
  44 This function will return the current
  45 .B personality
  46 when
  47 .I persona
  48 equals 0xffffffff. Otherwise, it will make the execution domain
  49 referenced by
  50 .I persona
  51 the new execution domain of the current process.
  52 .SH "RETURN VALUE"
  53 On success, the previous
  54 .I persona
  55 is returned. On error, \-1 is returned, and
  56 .I errno
  57 is set appropriately.
  58 .SH ERRORS
  59 .TP
  60 .B EINVAL
  61 The kernel was unable to change the personality.
  62 .SH "CONFORMING TO"
  63 .B personality
  64 is Linux-specific and should not be used in programs intended to be portable.