Name

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

Synopsis

setarch 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).

−3,−−3gb

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

−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 <[email protected]>

Jindrich Novy <[email protected]>

AVAILABILITY

The setarch command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.