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SETARCH(8)                                      System Administration                                      SETARCH(8)



NAME
       setarch - change reported architecture in new program environment and set personality flags

SYNOPSIS
       setarch <arch> [options] [program [arguments]]
       arch [options] [program [arguments]]

DESCRIPTION
       setarch  This  utility currently only affects the output of uname -m. For example, on an AMD64 system, running
       'setarch i386 program' will cause 'program' to see i686 (or other relevant arch) instead of x86_64 as  machine
       type. It also allows to set various personality options. The default program is /bin/sh.

OPTIONS
       -v, --verbose
              Be verbose.

       -h, --help
              Display help (it is also displayed when setarch takes no arguments).

       -V, --version
              Output version information and exit.

       --uname-2.6
              Causes the program to see a kernel version number beginning with 2.6.

       -3, --3gb
              Specifies  that processes should use a maximum of 3GB of address space on systems where it is supported
              (ADDR_LIMIT_3GB).

       --4gb  Ignored (for backward compatibility only).

       --list List architectures that can be set.

       -B, --32bit
              Turns on ADDR_LIMIT_32BIT.

       -F, --fdpic-funcptrs
              Userspace function pointers point to descriptors (turns on FDPIC_FUNCPTRS).

       -I, --short-inode
              Turns on SHORT_INODE.

       -L, --addr-compat-layout
              Changes the way virtual memory is allocated (turns on the ADDR_COMPAT_LAYOUT).

       -R, --addr-no-randomize
              Disables randomization of the virtual address space (turns on ADDR_NO_RANDOMIZE).

       -S, --whole-seconds
              Turns on WHOLE_SECONDS.

       -T, --sticky-timeouts
              Turns on STICKY_TIMEOUTS.

       -X, --read-implies-exec
              Turns on READ_IMPLIES_EXEC.

AVAILABILITY
       The setarch command is part of the util-linux package and is  available  from  Linux  Kernel  Archive  ⟨ftp://
       ftp.kernel.org/pub/linux/utils/util-linux/⟩.



util-linux                                          September 2011                                         SETARCH(8)