[Regression] stdout/stderr handling in 10.5.2

[hendrikdonner]

Hello,

on 10.3.2, for all processes dhcpcd creates

i see in /proc/ that stdout/stderr are /dev/null:

ls -lah /proc/<pid>/fd
...
l-wx------    1 root     root          64 Aug 28 16:58 1 -> /dev/null
l-wx------    1 root     root          64 Aug 28 16:58 2 -> /dev/null

However with 10.5.2 i see

l-wx------    1 root     root          64 Aug 27 18:20 1 -> pipe:[54494]
l-wx------    1 root     root          64 Aug 27 18:20 2 -> pipe:[54495]

for the initial process (started via a script), or

lrwx------    1 root     root          64 Aug 27 18:52 1 -> /dev/ttymxc2
lrwx------    1 root     root          64 Aug 27 18:52 2 -> /dev/ttymxc2

when called more directly for testing purposes.

That has caused issues in our deployment due to some other process ending up in a blocking read on the pipe. Used to work fine up to 10.3.2 inclusively.
Now i tried to follow the code and i assume for some reason dhcpcd_daemonise hasn't been called.

Parameters for dhcpcd are -b -qq -f </path/to/the/config> <interface>.