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SETARCH

Section: System Administration (8)
Updated: December 2014
Index Return to Main Contents
 

NAME

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

SYNOPSIS

setarch arch [options] [program [argument...]]

arch [options] [program [argument...]]

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 setarch knows about. Whether setarch can actually set each of these architectures depends on the running kernel.
--uname-2.6
Causes the program to see a kernel version number beginning with 2.6.
-v, --verbose
Be 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, --version
Display version information and exit.
-h, --help
Display 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


 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
EXAMPLES
AUTHOR
AVAILABILITY


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