If builders built buildings the way programmers wrote programs, then the first woodpecker that came along would destroy civilisation.
I am doing a startup!
Cross-browser testing from your browser!
I have written my fourth book!
Be faster than Larry Wall in the shell!
You're replying to a comment by Cam Hutchison.
You have to be careful doing a read loop over stdin, as any programs inside the loop will also have their stdin attached to the same source as the read command. It occasionally produces screwy results and causes a lot of head scratching.
An alternative is to read from a different file descriptor:
exec 3< input_file.txt # open input_file.txt on fd 3
while read -u 3 -r line ; do
# do stuff here
exec 3<&- # close fd 3
This potentially has the same problem because fd 3 will be inherited by the programs in the loop, but there is very little likelihood that they will try and read from it, as they may with fd 0 (stdin).
And now we're getting even further from a one-liner...
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