SETARCH(8) - man page online | administration and privileged commands

Change reported architecture in new program environment and set personality flags.

December 2014
SETARCH(8)                            System Administration                            SETARCH(8)


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


setarch arch [options] [program [argument...]] arch [options] [program [argument...]] setarch --list|-h|-V


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.


--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.


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


Elliot Lee ⟨⟩ Jindrich Novy ⟨⟩


The setarch command is part of the util-linux package and is available from Linux Kernel Archive ⟨⟩.
util-linux December 2014 SETARCH(8)
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setarch(8) referred by personality(2)
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