This is the snippet of the code in the systemV init system that controls the serial console login depending on the token
TOKENEXIST=`grep "TOKEN=" /proc/cmdline` TOKEN=0 if [ "X$TOKENEXIST" != "X" ]; then #If token is pass as a command line arg, use it. TOKEN=`sed 's/.*TOKEN=//; s/ .*//' /proc/cmdline` fi TOKENOVERRIDE=`grep "TOKENOVERRIDE=" /proc/cmdline` if [ "X$TOKENOVERRIDE" != "X" ]; then #If token is pass as a command line arg, use it. OVERRIDE=`sed 's/.*TOKENOVERRIDE=//; s/ .*//' /proc/cmdline` let "TOKEN = $TOKEN & $OVERRIDE" fi echo "TOKEN = $TOKEN" let "CONSOLE_LOGIN = $TOKEN & 512" if [ $CONSOLE_LOGIN -ne 0 ]; then echo "[`eval $uptime`]: Begin Console Access" /etc/console_login & echo "eCM console is enabled" export ENABLE_ECM_CONSOLE=y else echo "[`eval $uptime`]: Token doesn't allow console access" export ENABLE_ECM_CONSOLE=n fi I am trying to implement the same in the sytemd init system. On Sun, Apr 19, 2015 at 11:48 AM, Andrei Borzenkov <arvidj...@gmail.com> wrote: > В Sat, 18 Apr 2015 19:54:50 +0530 > Praveen kumar R <praveenrgo...@gmail.com> пишет: > > > Yes it's a kernel command line arg, it is board specific token introduced > > to control the serial console. > > if defined serial console should not be enabled. > > > > Sorry I do not understand this sentence. "define" what? Please give > exact example of kernel command line and explain what behavior you > expect in this case. > > > we have this in place for other system initializing system - sytemV , > where > > depending > > > > On Fri, Apr 17, 2015 at 4:24 PM, Lennart Poettering < > lenn...@poettering.net > > <javascript:_e(%7B%7D,'cvml','lenn...@poettering.net');>> wrote: > > > > > On Fri, 17.04.15 15:54, Praveen kumar R (praveenrgo...@gmail.com > > > <javascript:_e(%7B%7D,'cvml','praveenrgo...@gmail.com');>) wrote: > > > > > > > I have a token passed on by command line argument on which I need to > > > decide > > > > to start the serial > > > > > > On which command line? Kernel command line? What kind of "token"? > > > > > > > console or not. I plan to tweak the getty*ttyS0.service and add the > > > > script which validates the token and starts the console. > > > > > > > > Is this the right approach or is there any better way of handling it > ?? > > > > > > To get a login getty on the serial port its sufficient to add > > > console=ttyS0... to the kernel cmdline. systemd automatically starts a > > > serial getty automatically on the first terminal the kernel console is > > > pointing to. > > > > > > Lennart > > > > > > -- > > > Lennart Poettering, Red Hat > > > > >
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