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nspawn: document why the uid shift range is the way it is

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This commit is contained in:
Lennart Poettering 2016-07-14 12:25:32 +02:00
parent 00d0fd0619
commit 065d31c360
1 changed files with 3 additions and 1 deletions
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4
src/nspawn/nspawn.c
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@ -101,9 +101,11 @@
#include "util.h"
/* Note that devpts's gid= parameter parses GIDs as signed values, hence we stay away from the upper half of the 32bit
* UID range here */
* UID range here. We leave a bit of room at the lower end and a lot of room at the upper end, so that other subsystems
* may have their own allocation ranges too. */
#define UID_SHIFT_PICK_MIN ((uid_t) UINT32_C(0x00080000))
#define UID_SHIFT_PICK_MAX ((uid_t) UINT32_C(0x6FFF0000))
/* nspawn is listening on the socket at the path in the constant nspawn_notify_socket_path
* nspawn_notify_socket_path is relative to the container
* the init process in the container pid can send messages to nspawn following the sd_notify(3) protocol */