executing command with ssh causes bash shell script loop to terminate

Asked Feb 14 '18 at 18:10

Active Feb 14 '18 at 18:13

Viewed 972 times

This script should call ls on the remote host N times, where N is the number of lines in the file file-name. For some reason it always runs once and then exits. If I change f to do something else (print a number, print the line of the file, etc) it works as expected and f is called N times. When I'm using ssh to execute a remote command, it only runs once. I did notice that changing the loop to no longer read input from the file seems to fix the issue, but I'd like to try and fix it a different way (I need to read the file).

function f() {
    ssh -i key user@host ls
}

while read line; do
  f
done<file-name

asked Feb 14 '18 at 18:10

Bryant

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3

This is a FAQ. I'll find the dupe to close it with in a minute, but short form: `ssh ... – Charles Duffy Feb 14 '18 at 18:11
2

...the other thing you can do is to use a different FD for the file to read; ie. `done 3 – Charles Duffy Feb 14 '18 at 18:13
thanks! I guess i wasnt searching for the right thing, because it didnt come up when i was searching on SO – Bryant Feb 14 '18 at 18:18
2

`ssh -n` is another way to solve this problem. – codeforester Feb 14 '18 at 18:57

executing command with ssh causes bash shell script loop to terminate

0 Answers0