Our handling of user namespaces is more complex than it needs to be. This simplifies the handling by identifying and entering (or creating) the correct userns earlier, so that later code doesn't need to deal with it any more. Along the way we make a number of other cleanups to handling of userns and setting our user and group. This is based on my earlier test command dispatch and performance test cleanup series. Changes since v2: * Correction to man page to match behaviour change in 10/10 * Minor changes to spacing and wording of comments Changes since v1: * Fixed overenthusiastic pruning of #includes when moving the self-isolation code which broke compile on some distro versions David Gibson (10): Don't store UID & GID persistently in the context structure Split checking for root from dropping root privilege Consolidate determination of UID/GID to run as Safer handling if we can't open /proc/self/uid_map Move self-isolation code into a separate file Consolidate validation of pasta namespace options Clean up and rename conf_ns_open() Correctly handle --netns-only in pasta_start_ns() Handle userns isolation and dropping root at the same time Allow --userns when pasta spawns a command Makefile | 8 +- conf.c | 236 ++++++++++++++++++++++++++-------------------------- isolation.c | 210 ++++++++++++++++++++++++++++++++++++++++++++++ isolation.h | 15 ++++ passt.1 | 7 +- passt.c | 116 +------------------------- passt.h | 9 -- pasta.c | 91 ++++++++++++-------- pasta.h | 1 + util.c | 83 ------------------ util.h | 2 - 11 files changed, 412 insertions(+), 366 deletions(-) create mode 100644 isolation.c create mode 100644 isolation.h -- 2.37.3