## NAME

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

## SYNOPSIS

setarch arch [options]

setarch --list | -h | -V

## DESCRIPTION

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

## OPTIONS

--list List the architectures that can be set.

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

-v, --verboseBe verbose.

-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).

-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.

-V, --versionDisplay version information and exit.

-h, --helpDisplay help text and exit.

## 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

Jindrich Novy

## AVAILABILITY

The setarch command is part of the util-linux package and is available from

Linux Kernel Archive