Default [Q] adb shell prompt

Hey everyone I got a very technical question

I am trying to set a custom prompt for the shell on an android device running bourne shell (sh), I have suceeded in setting it for a login shell (sh -l) but I would like to make this default for non login like adb or ssh through connectbot @localhost. Normally on linux I could do this by editing /etc/profile but for some reason on my android sh does not read /etc/profile unless it is a login shell. I tried moving the sh binary and replacing the sh binary in /system/bin with a shell script that executes sh -l but I loose superuser access ( shell reports su command not found) so I moved sh back to /system/bin/sh. Does anyone have any Idea which file is read in by sh at launch?