Bash - Execute background process whilst reading output
I'm trying to start a process (target_executable) and have it run in the background. I know I could do that via ./target_executable & but in the bash script that's running the show, I want to read the output of the process looking for a particular output. Then once the output is . found, I want to let the the script complete whilst the target process is left running in the background.
This is what I have so far but there are a number of things wrong (its not running the process in the background, and it never hits "Finished Reading" even though the ID is found):
echo "Starting Process..."
TARGET_ID=""
./target_executable | while read -r line || [[ "$TARGET_ID" == "" ]] ; do
TARGET_ID=$(echo "$line" | grep -oE 'Id = [0-9A-Z]+' | grep -oE '[0-9A-Z]{10,}')
if [ "$TARGET_ID" != "" ]
then
echo "Processing $line '$TARGET_ID'"
fi
done
echo "Finished Reading..."
Any thoughts? I'm guessing that there is a much better way of doing this but I'm new to bash and the solution is alluding me.
bash background-process
asked 7 mins ago
anthonyvanthonyv
101
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anthonyv is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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I'm trying to start a process (target_executable) and have it run in the background. I know I could do that via ./target_executable & but in the bash script that's running the show, I want to read the output of the process looking for a particular output. Then once the output is . found, I want to let the the script complete whilst the target process is left running in the background.
This is what I have so far but there are a number of things wrong (its not running the process in the background, and it never hits "Finished Reading" even though the ID is found):
echo "Starting Process..."
TARGET_ID=""
./target_executable | while read -r line || [[ "$TARGET_ID" == "" ]] ; do
TARGET_ID=$(echo "$line" | grep -oE 'Id = [0-9A-Z]+' | grep -oE '[0-9A-Z]{10,}')
if [ "$TARGET_ID" != "" ]
then
echo "Processing $line '$TARGET_ID'"
fi
done
echo "Finished Reading..."
Any thoughts? I'm guessing that there is a much better way of doing this but I'm new to bash and the solution is alluding me.
bash background-process
asked 7 mins ago
anthonyvanthonyv
101
New contributor
anthonyv is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I'm trying to start a process (target_executable) and have it run in the background. I know I could do that via ./target_executable & but in the bash script that's running the show, I want to read the output of the process looking for a particular output. Then once the output is . found, I want to let the the script complete whilst the target process is left running in the background.
This is what I have so far but there are a number of things wrong (its not running the process in the background, and it never hits "Finished Reading" even though the ID is found):
echo "Starting Process..."
TARGET_ID=""
./target_executable | while read -r line || [[ "$TARGET_ID" == "" ]] ; do
TARGET_ID=$(echo "$line" | grep -oE 'Id = [0-9A-Z]+' | grep -oE '[0-9A-Z]{10,}')
if [ "$TARGET_ID" != "" ]
then
echo "Processing $line '$TARGET_ID'"
fi
done
echo "Finished Reading..."
Any thoughts? I'm guessing that there is a much better way of doing this but I'm new to bash and the solution is alluding me.
bash background-process
asked 7 mins ago
anthonyvanthonyv
101
New contributor
anthonyv is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I'm trying to start a process (target_executable) and have it run in the background. I know I could do that via ./target_executable & but in the bash script that's running the show, I want to read the output of the process looking for a particular output. Then once the output is . found, I want to let the the script complete whilst the target process is left running in the background.
This is what I have so far but there are a number of things wrong (its not running the process in the background, and it never hits "Finished Reading" even though the ID is found):
echo "Starting Process..."
TARGET_ID=""
./target_executable | while read -r line || [[ "$TARGET_ID" == "" ]] ; do
TARGET_ID=$(echo "$line" | grep -oE 'Id = [0-9A-Z]+' | grep -oE '[0-9A-Z]{10,}')
if [ "$TARGET_ID" != "" ]
then
echo "Processing $line '$TARGET_ID'"
fi
done
echo "Finished Reading..."
Any thoughts? I'm guessing that there is a much better way of doing this but I'm new to bash and the solution is alluding me.
bash background-process
bash background-process
asked 7 mins ago
anthonyvanthonyv
101
New contributor
anthonyv is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 7 mins ago
anthonyvanthonyv
101
New contributor
anthonyv is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 7 mins ago
anthonyvanthonyv
101
New contributor
anthonyv is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 7 mins ago
anthonyvanthonyv
101
asked 7 mins ago
anthonyvanthonyv
101
101
New contributor
anthonyv is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
anthonyv is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
anthonyv is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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