Quoting sukadev@xxxxxxxxxxxxxxxxxx (sukadev@xxxxxxxxxxxxxxxxxx):
> From: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxxxxxxx>
>
> ns_exec knows the pid of the container-init in its own namespace (this
> is usually the global pid since we normally run ns_exec in init-pid-ns).
> If ns_exec writes out this "global" pid to a file, wrapper scripts can
> find the process they created more easily.
>
> killall and pidof assume that all previous instances of the test program
> have thawed and exited gracefully :-) As such they are not very friendly
> during early testing and/or complicate the wrapper scripts.
>
> Signed-off-by: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxxxxxxx>
> ---
> ns_exec.c | 28 ++++++++++++++++++++++++++--
> 1 files changed, 26 insertions(+), 2 deletions(-)
>
> diff --git a/ns_exec.c b/ns_exec.c
> index 5d5cca3..d15daa0 100644
> --- a/ns_exec.c
> +++ b/ns_exec.c
> @@ -24,7 +24,7 @@ static const char* procname;
>
> static void usage(const char *name)
> {
> - printf("usage: %s [-h] [-c] [-muip]"
> + printf("usage: %s [-h] [-c] [-muip] [-P <pid-file>]"
> "[command [arg ..]]\n", name);
> printf("\n");
> printf(" -h this message\n");
> @@ -33,6 +33,7 @@ static void usage(const char *name)
> printf(" -m mount namespace\n");
> printf(" -u utsname namespace\n");
> printf(" -i ipc namespace\n");
> + printf(" -P <pid-file> File in which to write global pid of cinit\n");
We probably don't care, but it's not necessarily the global pid.
Applying as is, bc I can't think of a better adjective.
thanks,
-serge
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