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run script when modem manager detects modem

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0

I need to run a script that will create a connection when modem manager detects a modem (ie. mmcli -L lists the modem). I currently have a udev rule set up to do this, but mmcli takes so long to register the modem that the script has already finished running.

I am hoping there is a way to do one of the following things:

1. Delay the start of the script from udev


2. Allow the script to run in the background or go to sleep until mmcli sees the modem (I have been trying to get this to work, but calls to the sleep function are skipped, and it won't let me run in a different thread)


3. Run script automatically when mmcli recognizes the modem

Here is a snippet of my most recent attempt:

sleep 10

count=0

while [ count < 300 ]

do

    index=$(mmcli -L | grep Modem | head -n1 | awk '{print $1;}')

    let "count+=1"

done

port=$(mmcli -m $index | grep 'primary port' | grep -oP 'ttyACM[0-9]')

connection=$(nmcli c show | grep "modem${port: -1}")

# check if connection does not exist

if [ ! $connection ]; then

    echo 'adding new connection at ' date >> /home/nvidia/runlog.txt

    nmcli c add type gsm ifname "${port}" con-name "modem${port: -1}" apn testers.apn.com

fi

nmcli c up "modem${port: -1}"

scripts network-manager udev usb-modem modem-manager

share|improve this question

edited 8 hours ago

dessert

25.7k674108

asked 9 hours ago

AustinAustin

13

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  How about testing for the modem to show up in the output of mmcli -L inside the script before the connection part? Something like: while :;do mmcli -L|grep -q modem_name&&break;sleep 1;done – Or how about using the -w option to “Monitor the state of a given modem”, one could parse its output and act on that.
  
  – dessert
  9 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I will try, but up to now nothing in the script has worked. Udev is supposed to be used for short scripts and every time I try to slow the script down it doesn't work. I have put sleep statements in and it just ignores them. I have tried to put really long loops in the code, but it just ignores them, somehow.
  
  – Austin
  9 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @dessert your suggestion had some success, it didn't skip over the loop. It did have the unexpected consequence of modem manager never recognizing the modem. I think this has to do with the rule never finishing since it waits for the modem to register. Udev may have blocked it from being seen while the script was run, I will be looking more into this.
  
  – Austin
  9 hours ago
  

  
  
  
  

add a comment | 

0

I need to run a script that will create a connection when modem manager detects a modem (ie. mmcli -L lists the modem). I currently have a udev rule set up to do this, but mmcli takes so long to register the modem that the script has already finished running.

I am hoping there is a way to do one of the following things:

1. Delay the start of the script from udev


2. Allow the script to run in the background or go to sleep until mmcli sees the modem (I have been trying to get this to work, but calls to the sleep function are skipped, and it won't let me run in a different thread)


3. Run script automatically when mmcli recognizes the modem

Here is a snippet of my most recent attempt:

sleep 10

count=0

while [ count < 300 ]

do

    index=$(mmcli -L | grep Modem | head -n1 | awk '{print $1;}')

    let "count+=1"

done

port=$(mmcli -m $index | grep 'primary port' | grep -oP 'ttyACM[0-9]')

connection=$(nmcli c show | grep "modem${port: -1}")

# check if connection does not exist

if [ ! $connection ]; then

    echo 'adding new connection at ' date >> /home/nvidia/runlog.txt

    nmcli c add type gsm ifname "${port}" con-name "modem${port: -1}" apn testers.apn.com

fi

nmcli c up "modem${port: -1}"

scripts network-manager udev usb-modem modem-manager

share|improve this question

edited 8 hours ago

dessert

25.7k674108

asked 9 hours ago

AustinAustin

13

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  How about testing for the modem to show up in the output of mmcli -L inside the script before the connection part? Something like: while :;do mmcli -L|grep -q modem_name&&break;sleep 1;done – Or how about using the -w option to “Monitor the state of a given modem”, one could parse its output and act on that.
  
  – dessert
  9 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I will try, but up to now nothing in the script has worked. Udev is supposed to be used for short scripts and every time I try to slow the script down it doesn't work. I have put sleep statements in and it just ignores them. I have tried to put really long loops in the code, but it just ignores them, somehow.
  
  – Austin
  9 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @dessert your suggestion had some success, it didn't skip over the loop. It did have the unexpected consequence of modem manager never recognizing the modem. I think this has to do with the rule never finishing since it waits for the modem to register. Udev may have blocked it from being seen while the script was run, I will be looking more into this.
  
  – Austin
  9 hours ago
  

  
  
  
  

add a comment | 

I need to run a script that will create a connection when modem manager detects a modem (ie. mmcli -L lists the modem). I currently have a udev rule set up to do this, but mmcli takes so long to register the modem that the script has already finished running.

I am hoping there is a way to do one of the following things:

1. Delay the start of the script from udev


2. Allow the script to run in the background or go to sleep until mmcli sees the modem (I have been trying to get this to work, but calls to the sleep function are skipped, and it won't let me run in a different thread)


3. Run script automatically when mmcli recognizes the modem

Here is a snippet of my most recent attempt:

sleep 10

count=0

while [ count < 300 ]

do

    index=$(mmcli -L | grep Modem | head -n1 | awk '{print $1;}')

    let "count+=1"

done

port=$(mmcli -m $index | grep 'primary port' | grep -oP 'ttyACM[0-9]')

connection=$(nmcli c show | grep "modem${port: -1}")

# check if connection does not exist

if [ ! $connection ]; then

    echo 'adding new connection at ' date >> /home/nvidia/runlog.txt

    nmcli c add type gsm ifname "${port}" con-name "modem${port: -1}" apn testers.apn.com

fi

nmcli c up "modem${port: -1}"

scripts network-manager udev usb-modem modem-manager

share|improve this question

edited 8 hours ago

dessert

25.7k674108

asked 9 hours ago

AustinAustin

13

sleep 10

count=0

while [ count < 300 ]

do

    index=$(mmcli -L | grep Modem | head -n1 | awk '{print $1;}')

    let "count+=1"

done

port=$(mmcli -m $index | grep 'primary port' | grep -oP 'ttyACM[0-9]')

connection=$(nmcli c show | grep "modem${port: -1}")

# check if connection does not exist

if [ ! $connection ]; then

    echo 'adding new connection at ' date >> /home/nvidia/runlog.txt

    nmcli c add type gsm ifname "${port}" con-name "modem${port: -1}" apn testers.apn.com

fi

nmcli c up "modem${port: -1}"

share|improve this question

edited 8 hours ago

dessert

25.7k674108

asked 9 hours ago

AustinAustin

13

share|improve this question

edited 8 hours ago

dessert

25.7k674108

asked 9 hours ago

AustinAustin

13

edited 8 hours ago

dessert

25.7k674108

edited 8 hours ago

dessert

25.7k674108

asked 9 hours ago

AustinAustin

13

asked 9 hours ago

AustinAustin

13