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setarch

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).

-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 <sopwith@redhat.com>
Jindrich Novy <jnovy@redhat.com>

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/.