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.

       -Z, --mmap-page-zero
	      Turns on MMAP_PAGE_ZERO.

EXAMPLES

       setarch ppc32 rpmbuild --target=ppc --rebuild foo.src.rpm
       setarch ppc32 -v -vL3 rpmbuild --target=ppc --rebuild bar.src.rpm
       setarch ppc32 --32bit rpmbuild --target=ppc --rebuild foo.src.rpm

AUTHOR

       Elliot Lee <sopwith@redhat.com>
       Jindrich Novy <jnovy@redhat.com>

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)