Giuseppe Scrivano 1091440e5d
rootless: fix usage with hidepid=1 ...
when /proc is mounted with hidepid=1 a process doesn't see processes
from the outer user namespace. This causes an issue reading the
cmdline from the parent process.
To address it, always read the command line from /proc/self instead of
using /proc/PARENT_PID.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com >
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