genode/os/run/chroot.run
Norman Feske 88aab61e09 Mechanism for using chroot on Linux
The new 'chroot' tool at 'os/src/app/chroot' allows for executing
subsystems within chroot jails on Linux. For using the tool, please
refer to the test case 'os/run/chroot.run'. Fixes #37
2012-04-20 11:21:24 +02:00

123 lines
2.8 KiB
Tcl

#
# \brief Test for using chroot on Linux
# \author Norman Feske
# \date 2012-04-18
#
#
if {![have_spec linux]} { puts "Run script requires Linux"; exit 0 }
#
# Build
#
build { core init app/chroot drivers/timer/linux test/timer }
if {[catch { exec which setcap }]} {
puts stderr "Error: setcap not available, please install the libcap2-bin package"
return 0
}
create_boot_directory
#
# Generate config
#
set config {
<config>
<parent-provides>
<service name="ROM"/>
<service name="LOG"/>
<service name="CAP"/>
<service name="RAM"/>
<service name="CPU"/>
<service name="RM"/>
<service name="PD"/>
</parent-provides>
<default-route>
<any-service> <parent/> <any-child/> </any-service>
</default-route>
<start name="timer">
<resource name="RAM" quantum="1M"/>
<provides><service name="Timer"/></provides>
</start>
<start name="chroot">
<resource name="RAM" quantum="1G"/>
<config verbose="yes">
<root path="chroot_path" />
<parent-provides>
<service name="ROM"/>
<service name="LOG"/>
<service name="CAP"/>
<service name="RAM"/>
<service name="CPU"/>
<service name="RM"/>
<service name="PD"/>
<service name="Timer"/>
</parent-provides>
<default-route>
<any-service> <parent/> </any-service>
</default-route>
<start name="test-timer">
<resource name="RAM" quantum="1G"/>
</start>
</config>
</start>
</config>
}
proc chroot_path { } { return "/tmp/chroot-test" }
proc chroot_cwd_path { } { return "[chroot_path][pwd]/[run_dir]" }
proc chroot_genode_tmp_path { } { return "[chroot_path]/tmp/genode-[exec id -u]" }
proc cleanup_chroot { } {
catch { exec sudo umount -l [chroot_cwd_path] }
catch { exec sudo umount -l [chroot_genode_tmp_path] }
exec rm -rf [chroot_path]
}
# replace 'chroot_path' marker in config with actual path
regsub "chroot_path" $config [chroot_path] config
install_config $config
#
# Copy boot modules into run directory
#
# We cannot use the predefined 'build_boot_image' function here because
# this would create mere symlinks. However, we want to hardlink the
# run directory into the chroot environment. If the directory entries
# were symlinks, those would point to nowhere within the chroot.
#
foreach binary { core init chroot timer test-timer } {
exec cp -H bin/$binary [run_dir] }
#
# Grant chroot permission to 'chroot' tool
#
# CAP_SYS_ADMIN is needed for bind mounting genode runtime directories
# CAP_SYS_CHROOT is needed to perform the chroot syscall
#
exec sudo setcap cap_sys_admin,cap_sys_chroot=ep [run_dir]/chroot
#
# Setup chroot environment
#
# start with fresh directory
cleanup_chroot
exec mkdir -p [chroot_path]
#
# Execute test case
#
run_genode_until {.*--- timer test finished ---.*} 60
#
# Remove artifacts created while running the test
#
cleanup_chroot
# vi: set ft=tcl :