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screen, expect and scripted detached interaction

Can I nohup/screen an already-started process?Moving an already-running process to ScreenSudo as different user and running screenrun several bash scripts with expect code and leave them runningscreen is not detachedkill screen session in an expect scriptStart detached screen sessionCentOS 7: Getting interface IP numbersexpect script running screen stops working when run by cronResuming detached “screen” leads to blank screen

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0

Trying to write a bash script which will open a screen, start a python application, and interact with the python interaction as required when it is first started.

If not possible in screen, I would be happy to switch to tmux as an alternative. I am just not that great at bash scripting and have no experience with expect.

Here is what I have so far:

sent=blah
expexec=$(/usr/bin/expect -c "/usr/bin/python /opt/app.py expect "Interaction:" send "$sentr" interact")
/usr/bin/screen -L -dmS spawner /bin/sleep 30
/bin/sleep 1
/usr/bin/screen -S spawner -X screen screen -L -dR myDaemon
/bin/sleep 1
/usr/bin/screen -S myDaemon -X detach
/usr/bin/screen -S myDaemon -X stuff "echo $expexec"
/usr/bin/screen -S spawner -X stuff "exitr"

Hoping someone can help me...

Above is the latest iteration, where I have tried to write the entire command as seen in another example in a variable. The screen commands all work, but I can't get expect to correctly execute and look for the input queue and send the response.

Thanks in advance,

JG

bash gnu-screen expect

share|improve this question

asked Apr 30 '13 at 8:05

johnnygearjohnnygear

3811 gold badge22 silver badges88 bronze badges

add a comment | 

0

Trying to write a bash script which will open a screen, start a python application, and interact with the python interaction as required when it is first started.

If not possible in screen, I would be happy to switch to tmux as an alternative. I am just not that great at bash scripting and have no experience with expect.

Here is what I have so far:

sent=blah
expexec=$(/usr/bin/expect -c "/usr/bin/python /opt/app.py expect "Interaction:" send "$sentr" interact")
/usr/bin/screen -L -dmS spawner /bin/sleep 30
/bin/sleep 1
/usr/bin/screen -S spawner -X screen screen -L -dR myDaemon
/bin/sleep 1
/usr/bin/screen -S myDaemon -X detach
/usr/bin/screen -S myDaemon -X stuff "echo $expexec"
/usr/bin/screen -S spawner -X stuff "exitr"

Hoping someone can help me...

Above is the latest iteration, where I have tried to write the entire command as seen in another example in a variable. The screen commands all work, but I can't get expect to correctly execute and look for the input queue and send the response.

Thanks in advance,

JG

bash gnu-screen expect

share|improve this question

asked Apr 30 '13 at 8:05

johnnygearjohnnygear

3811 gold badge22 silver badges88 bronze badges

add a comment | 

Trying to write a bash script which will open a screen, start a python application, and interact with the python interaction as required when it is first started.

If not possible in screen, I would be happy to switch to tmux as an alternative. I am just not that great at bash scripting and have no experience with expect.

Here is what I have so far:

sent=blah
expexec=$(/usr/bin/expect -c "/usr/bin/python /opt/app.py expect "Interaction:" send "$sentr" interact")
/usr/bin/screen -L -dmS spawner /bin/sleep 30
/bin/sleep 1
/usr/bin/screen -S spawner -X screen screen -L -dR myDaemon
/bin/sleep 1
/usr/bin/screen -S myDaemon -X detach
/usr/bin/screen -S myDaemon -X stuff "echo $expexec"
/usr/bin/screen -S spawner -X stuff "exitr"

Hoping someone can help me...

Above is the latest iteration, where I have tried to write the entire command as seen in another example in a variable. The screen commands all work, but I can't get expect to correctly execute and look for the input queue and send the response.

Thanks in advance,

JG

bash gnu-screen expect

share|improve this question

asked Apr 30 '13 at 8:05

johnnygearjohnnygear

3811 gold badge22 silver badges88 bronze badges

sent=blah
expexec=$(/usr/bin/expect -c "/usr/bin/python /opt/app.py expect "Interaction:" send "$sentr" interact")
/usr/bin/screen -L -dmS spawner /bin/sleep 30
/bin/sleep 1
/usr/bin/screen -S spawner -X screen screen -L -dR myDaemon
/bin/sleep 1
/usr/bin/screen -S myDaemon -X detach
/usr/bin/screen -S myDaemon -X stuff "echo $expexec"
/usr/bin/screen -S spawner -X stuff "exitr"

share|improve this question

asked Apr 30 '13 at 8:05

johnnygearjohnnygear

3811 gold badge22 silver badges88 bronze badges

share|improve this question

asked Apr 30 '13 at 8:05

johnnygearjohnnygear

3811 gold badge22 silver badges88 bronze badges

asked Apr 30 '13 at 8:05

johnnygearjohnnygear

3811 gold badge22 silver badges88 bronze badges

asked Apr 30 '13 at 8:05

johnnygearjohnnygear

3811 gold badge22 silver badges88 bronze badges

1 Answer
1

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0

Just in case this will help anyone else, I thought I would let everyone know how I got this working. I simply split my one script into two, with the expect portion in its own script. My version only makes use of one variable, but it is easily scalable I guess.

expect script:

#!/usr/bin/expect
set timeout 60

set sent [lindex $argv 0]

spawn /usr/bin/python /opt/app.py

expect "Interaction:"

send "$sentr";

interact

main script:

#!/bin/sh

# variables
sent=blah
expectScript=/path/to/expect/script

# bash screen detachment foo
/usr/bin/screen -L -dmS spawner /bin/sleep 30
/bin/sleep 1
/usr/bin/screen -S spawner -X screen screen -L -dR myDaemon
/bin/sleep 1
/usr/bin/screen -S myDaemon -X detach

# sending the command to the screen
/usr/bin/screen -S myDaemon -X stuff "$expectScript $sentr"

# close the screen spawner
/usr/bin/screen -S spawner -X stuff "exitr"

JG

share|improve this answer

answered May 2 '13 at 8:40

johnnygearjohnnygear

3811 gold badge22 silver badges88 bronze badges

add a comment | 

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0

Just in case this will help anyone else, I thought I would let everyone know how I got this working. I simply split my one script into two, with the expect portion in its own script. My version only makes use of one variable, but it is easily scalable I guess.

expect script:

#!/usr/bin/expect
set timeout 60

set sent [lindex $argv 0]

spawn /usr/bin/python /opt/app.py

expect "Interaction:"

send "$sentr";

interact

main script:

#!/bin/sh

# variables
sent=blah
expectScript=/path/to/expect/script

# bash screen detachment foo
/usr/bin/screen -L -dmS spawner /bin/sleep 30
/bin/sleep 1
/usr/bin/screen -S spawner -X screen screen -L -dR myDaemon
/bin/sleep 1
/usr/bin/screen -S myDaemon -X detach

# sending the command to the screen
/usr/bin/screen -S myDaemon -X stuff "$expectScript $sentr"

# close the screen spawner
/usr/bin/screen -S spawner -X stuff "exitr"

JG

share|improve this answer

answered May 2 '13 at 8:40

johnnygearjohnnygear

3811 gold badge22 silver badges88 bronze badges

add a comment | 

0

Just in case this will help anyone else, I thought I would let everyone know how I got this working. I simply split my one script into two, with the expect portion in its own script. My version only makes use of one variable, but it is easily scalable I guess.

expect script:

#!/usr/bin/expect
set timeout 60

set sent [lindex $argv 0]

spawn /usr/bin/python /opt/app.py

expect "Interaction:"

send "$sentr";

interact

main script:

#!/bin/sh

# variables
sent=blah
expectScript=/path/to/expect/script

# bash screen detachment foo
/usr/bin/screen -L -dmS spawner /bin/sleep 30
/bin/sleep 1
/usr/bin/screen -S spawner -X screen screen -L -dR myDaemon
/bin/sleep 1
/usr/bin/screen -S myDaemon -X detach

# sending the command to the screen
/usr/bin/screen -S myDaemon -X stuff "$expectScript $sentr"

# close the screen spawner
/usr/bin/screen -S spawner -X stuff "exitr"

JG

share|improve this answer

answered May 2 '13 at 8:40

johnnygearjohnnygear

3811 gold badge22 silver badges88 bronze badges

add a comment | 

Just in case this will help anyone else, I thought I would let everyone know how I got this working. I simply split my one script into two, with the expect portion in its own script. My version only makes use of one variable, but it is easily scalable I guess.

expect script:

#!/usr/bin/expect
set timeout 60

set sent [lindex $argv 0]

spawn /usr/bin/python /opt/app.py

expect "Interaction:"

send "$sentr";

interact

main script:

#!/bin/sh

# variables
sent=blah
expectScript=/path/to/expect/script

# bash screen detachment foo
/usr/bin/screen -L -dmS spawner /bin/sleep 30
/bin/sleep 1
/usr/bin/screen -S spawner -X screen screen -L -dR myDaemon
/bin/sleep 1
/usr/bin/screen -S myDaemon -X detach

# sending the command to the screen
/usr/bin/screen -S myDaemon -X stuff "$expectScript $sentr"

# close the screen spawner
/usr/bin/screen -S spawner -X stuff "exitr"

JG

share|improve this answer

answered May 2 '13 at 8:40

johnnygearjohnnygear

3811 gold badge22 silver badges88 bronze badges

#!/usr/bin/expect
set timeout 60

set sent [lindex $argv 0]

spawn /usr/bin/python /opt/app.py

expect "Interaction:"

send "$sentr";

interact

#!/bin/sh

# variables
sent=blah
expectScript=/path/to/expect/script

# bash screen detachment foo
/usr/bin/screen -L -dmS spawner /bin/sleep 30
/bin/sleep 1
/usr/bin/screen -S spawner -X screen screen -L -dR myDaemon
/bin/sleep 1
/usr/bin/screen -S myDaemon -X detach

# sending the command to the screen
/usr/bin/screen -S myDaemon -X stuff "$expectScript $sentr"

# close the screen spawner
/usr/bin/screen -S spawner -X stuff "exitr"

share|improve this answer

answered May 2 '13 at 8:40

johnnygearjohnnygear

3811 gold badge22 silver badges88 bronze badges

answered May 2 '13 at 8:40

johnnygearjohnnygear

3811 gold badge22 silver badges88 bronze badges

answered May 2 '13 at 8:40

johnnygearjohnnygear

3811 gold badge22 silver badges88 bronze badges