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set test_name "context namespaces"
if {! [installtest_p]} {
untested $test_name
return
}
# can't really test user_ns right now since we don't know other uids
set ns_tests { pid_ns }
set output_string "END\r\n"
# before we can even run the test, check that unshare is available
# probably only available in kernels >= 2.6.16
if {[catch {exec which unshare}]} {
untested "$test_name (no unshare)"
return
}
# weed out the kernels that don't have free_pid_ns available to us
if {![min_kernel_vers_p 3.7]} {
untested "$test_name (kernel version is too low)"
return
}
# Note we have to be root to run "unshare".
set effective_uid [exec /usr/bin/id -u]
if {$effective_uid != 0} {
untested "$test_name (must be root)"
return
}
# use unshare to generate new namespaces to use
# the returned pid is not the new proc's pid (as seen in the root ns)
spawn unshare -pf "sleep" 160
set exe_id $spawn_id
# instead, we'll use pgrep to find the sleep process. let's hope we only find one
# we'll narrow it down by specifying a parent proc id
set parent_proc [exp_pid -i $exe_id]
set child_proc [exec pgrep -P $parent_proc]
# make sure that we did find the child proc; if not, abort
if {!$child_proc || $child_proc < 0} {
untested "$test_name (cant make child_proc)"
return
}
verbose -log "child (global) pid:$child_proc"
foreach ns_test $ns_tests {
stap_run $ns_test no_load $output_string $srcdir/$subdir/$ns_test.stp -g --target-namespaces=$child_proc --disable-cache
}
# kill the parent
kill -INT -$parent_proc 2
catch {close -i $exe_id}
catch {wait -i $exe_id}
kill -INT -$child_proc 2
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