How to capture the result in a subprocess
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I'm working with telnet memcache and I'm going to use it as example, but I suppouse it can be extended in other subjects.
In the shell the process is
telnet <ip> <port> #this start the subroutine
connected to <ip>
Escape charecter ...
flush_all #My command
OK #the response /ERROR in case it fails
quit #my command
Connection closed by foreign host.
$ echo $?
1
I want to get the OK/ERROR message, but I don't know how. I'm execute the code in a script:
#!/bin/sh
ssh user@ip '
$(
(sleep 2;
FILE="$HOME/example.log"
DATE=$(date "+%d-%m-%Y %H:%M:%S")
echo flush_all
if [ $? == 0 ]; then
RES="Success "
else
RES="Fail "
fi;
echo "$DATE - $RES" >> $FILE;
sleep 2;
echo quit;
) | telnet <ip> 11211);' 2>/dev/null
But it always return a success, even if the command is añskjdflña, and I don't know how to get the difference between OK and ERROR.
shell-script ssh
asked Oct 9 '17 at 10:58
oootramas
115
 |Â
show 1 more comment
up vote
0
down vote
favorite
I'm working with telnet memcache and I'm going to use it as example, but I suppouse it can be extended in other subjects.
In the shell the process is
telnet <ip> <port> #this start the subroutine
connected to <ip>
Escape charecter ...
flush_all #My command
OK #the response /ERROR in case it fails
quit #my command
Connection closed by foreign host.
$ echo $?
1
I want to get the OK/ERROR message, but I don't know how. I'm execute the code in a script:
#!/bin/sh
ssh user@ip '
$(
(sleep 2;
FILE="$HOME/example.log"
DATE=$(date "+%d-%m-%Y %H:%M:%S")
echo flush_all
if [ $? == 0 ]; then
RES="Success "
else
RES="Fail "
fi;
echo "$DATE - $RES" >> $FILE;
sleep 2;
echo quit;
) | telnet <ip> 11211);' 2>/dev/null
But it always return a success, even if the command is añskjdflña, and I don't know how to get the difference between OK and ERROR.
shell-script ssh
asked Oct 9 '17 at 10:58
oootramas
115
What command are you running again?
– Raman Sailopal
Oct 9 '17 at 11:21
I want the response to 'flush_all'
– oootramas
Oct 9 '17 at 11:30
Does the system haveexpectinstalled?
– thrig
Oct 9 '17 at 14:05
No, and I can't install it
– oootramas
Oct 9 '17 at 14:20
I suspect that this doesn't do what you think it's doing. Note that the test that sets RES runs on the host into which you logged into viasshand that$?in that context is the exit status of theecho flush_allcommand when run on that host? That's not checking the exit status offlush_allon the host into which you logged in viatelnet.
– Andy Dalton
Oct 9 '17 at 18:00
 |Â
show 1 more comment
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I'm working with telnet memcache and I'm going to use it as example, but I suppouse it can be extended in other subjects.
In the shell the process is
telnet <ip> <port> #this start the subroutine
connected to <ip>
Escape charecter ...
flush_all #My command
OK #the response /ERROR in case it fails
quit #my command
Connection closed by foreign host.
$ echo $?
1
I want to get the OK/ERROR message, but I don't know how. I'm execute the code in a script:
#!/bin/sh
ssh user@ip '
$(
(sleep 2;
FILE="$HOME/example.log"
DATE=$(date "+%d-%m-%Y %H:%M:%S")
echo flush_all
if [ $? == 0 ]; then
RES="Success "
else
RES="Fail "
fi;
echo "$DATE - $RES" >> $FILE;
sleep 2;
echo quit;
) | telnet <ip> 11211);' 2>/dev/null
But it always return a success, even if the command is añskjdflña, and I don't know how to get the difference between OK and ERROR.
shell-script ssh
asked Oct 9 '17 at 10:58
oootramas
115
I'm working with telnet memcache and I'm going to use it as example, but I suppouse it can be extended in other subjects.
In the shell the process is
telnet <ip> <port> #this start the subroutine
connected to <ip>
Escape charecter ...
flush_all #My command
OK #the response /ERROR in case it fails
quit #my command
Connection closed by foreign host.
$ echo $?
1
I want to get the OK/ERROR message, but I don't know how. I'm execute the code in a script:
#!/bin/sh
ssh user@ip '
$(
(sleep 2;
FILE="$HOME/example.log"
DATE=$(date "+%d-%m-%Y %H:%M:%S")
echo flush_all
if [ $? == 0 ]; then
RES="Success "
else
RES="Fail "
fi;
echo "$DATE - $RES" >> $FILE;
sleep 2;
echo quit;
) | telnet <ip> 11211);' 2>/dev/null
But it always return a success, even if the command is añskjdflña, and I don't know how to get the difference between OK and ERROR.
shell-script ssh
shell-script ssh
asked Oct 9 '17 at 10:58
oootramas
115
asked Oct 9 '17 at 10:58
oootramas
115
asked Oct 9 '17 at 10:58
oootramas
115
asked Oct 9 '17 at 10:58
oootramas
115
asked Oct 9 '17 at 10:58
oootramas
115
115
What command are you running again?
– Raman Sailopal
Oct 9 '17 at 11:21
I want the response to 'flush_all'
– oootramas
Oct 9 '17 at 11:30
Does the system haveexpectinstalled?
– thrig
Oct 9 '17 at 14:05
No, and I can't install it
– oootramas
Oct 9 '17 at 14:20
I suspect that this doesn't do what you think it's doing. Note that the test that sets RES runs on the host into which you logged into viasshand that$?in that context is the exit status of theecho flush_allcommand when run on that host? That's not checking the exit status offlush_allon the host into which you logged in viatelnet.
– Andy Dalton
Oct 9 '17 at 18:00
 |Â
show 1 more comment
What command are you running again?
– Raman Sailopal
Oct 9 '17 at 11:21
I want the response to 'flush_all'
– oootramas
Oct 9 '17 at 11:30
Does the system haveexpectinstalled?
– thrig
Oct 9 '17 at 14:05
No, and I can't install it
– oootramas
Oct 9 '17 at 14:20
I suspect that this doesn't do what you think it's doing. Note that the test that sets RES runs on the host into which you logged into viasshand that$?in that context is the exit status of theecho flush_allcommand when run on that host? That's not checking the exit status offlush_allon the host into which you logged in viatelnet.
– Andy Dalton
Oct 9 '17 at 18:00
What command are you running again?
– Raman Sailopal
Oct 9 '17 at 11:21
What command are you running again?
– Raman Sailopal
Oct 9 '17 at 11:21
I want the response to 'flush_all'
– oootramas
Oct 9 '17 at 11:30
I want the response to 'flush_all'
– oootramas
Oct 9 '17 at 11:30
Does the system have
expect installed?– thrig
Oct 9 '17 at 14:05
Does the system have
expect installed?– thrig
Oct 9 '17 at 14:05
No, and I can't install it
– oootramas
Oct 9 '17 at 14:20
No, and I can't install it
– oootramas
Oct 9 '17 at 14:20
I suspect that this doesn't do what you think it's doing. Note that the test that sets RES runs on the host into which you logged into via
ssh and that $? in that context is the exit status of the echo flush_all command when run on that host? That's not checking the exit status of flush_all on the host into which you logged in via telnet.– Andy Dalton
Oct 9 '17 at 18:00
I suspect that this doesn't do what you think it's doing. Note that the test that sets RES runs on the host into which you logged into via
ssh and that $? in that context is the exit status of the echo flush_all command when run on that host? That's not checking the exit status of flush_all on the host into which you logged in via telnet.– Andy Dalton
Oct 9 '17 at 18:00
 |Â
show 1 more comment
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What command are you running again?
– Raman Sailopal
Oct 9 '17 at 11:21
I want the response to 'flush_all'
– oootramas
Oct 9 '17 at 11:30
Does the system have
expectinstalled?– thrig
Oct 9 '17 at 14:05
No, and I can't install it
– oootramas
Oct 9 '17 at 14:20
I suspect that this doesn't do what you think it's doing. Note that the test that sets RES runs on the host into which you logged into via
sshand that$?in that context is the exit status of theecho flush_allcommand when run on that host? That's not checking the exit status offlush_allon the host into which you logged in viatelnet.– Andy Dalton
Oct 9 '17 at 18:00