zx2c4@thinkpad ~ $ sudo strace -p 1
    Process 1 attached
    select(11, [10], NULL, NULL, {1, 122329}) = 0 (Timeout)
    stat("/dev/initctl", {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
    fstat(10, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
    stat("/dev/initctl", {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
    select(11, [10], NULL, NULL, {5, 0})    = 0 (Timeout)
    stat("/dev/initctl", {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
    fstat(10, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
    stat("/dev/initctl", {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
    select(11, [10], NULL, NULL, {5, 0}^CProcess 1 detached
    <detached ...>

Ptracing seems to work for me.