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How do you stop an infinite loop in shell?
Use kill as shown in cdarke’s answer. This will exit the loop if command has a non-zero exit code, which will happen if it is interrupted. So unless command handles SIGINT , pressing ctrl-C will both stop the current command and exit the loop.
How do you stop a while loop in bash?
You can also use the true built-in or any other statement that always returns true. The while loop above will run indefinitely. You can terminate the loop by pressing CTRL+C .
How do you break a while loop in Unix?
break exits from a for, select, while, or until loop in a shell script. If number is given, break exits from the given number of enclosing loops. The default value of number is 1 . break is a special built-in shell command.
How do you end a loop in C++?
Break Statement in C/C++ The break in C or C++ is a loop control statement which is used to terminate the loop. As soon as the break statement is encountered from within a loop, the loop iterations stops there and control returns from the loop immediately to the first statement after the loop.
When to use ssh-n in shell while loop?
If you have nested loops using read, use a different file descriptor for each one (9,8,7,…). ssh -n option prevents checking the exit status of ssh when using HEREdoc while piping output to another program. So use of /dev/null as stdin is preferred.
Is there an exit code for the for loop?
This will cause the code to exit if the for loop exits with a non-zero exit code. As a point of trivia, the 1 in exit 1 is not needed. A plain exit command would exit with the exit status of the last executed command which would be false (code=1) if the download fails.
How can I get this script to exit based on?
So if the curl command executes more than once, this script doesn’t have errexit set. If errexit is set and the curl command fails the script terminates right after the failed curl command. In the bash manual there is no hint that set -e ignores any failed return status of a single in a compound command.
Is there anything wrong with my script?
The purpose is to loop thru each line of the target file (whose path is the input parameter to the script) and do work against each line. Now, it seems only work with the very first line in the target file and stops after that line got processed. Is there anything wrong with my script?