The Design and Implementation of the Anykernel and Rump Kernels

A–32
RUMPHIJACK(3) NetBSD Library Functions Manual RUMPHIJACK(3)
NAME
rumphijack -- System call hijack library
LIBRARY
used by ld.so(1)
DESCRIPTION
The ld.so(1) runtime linker can be instructed to load rumphijack between
the main object and other libraries. This enables rumphijack to capture
and redirect system call requests to a rump kernel instead of the host
kernel.
The behaviour of hijacked applications is affected by the following environment
variables:
RUMPHIJACK
If present, this variable specifies which system calls should be
hijacked. The string is parsed as a comma-separated list of
‘‘name=value’’ tuples. The possible lefthandside names are:
‘‘path’’
Pathname-based system calls are hijacked if the path
the system call is directed to resides under value.
In case of an absolute pathname argument, a literal
prefix comparison is made. In case of a relative
pathname, the current working direct is examined.
This also implies that neither ‘‘..’’ nor symbolic
links will cause the namespace to be switched.
‘‘blanket’’ A colon-separated list of rump path prefixes. This
acts almost like ‘‘path’’ with the difference that
the prefix does not get removed when passing the path
NetBSD 5.99.48 March 14, 2011 NetBSD 5.99.48