chraebsli to Programmer Humor · 10 months agoTouch a file in Linuximagemessage-square94fedilinkarrow-up11.2Karrow-down131
arrow-up11.17Karrow-down1imageTouch a file in Linuxchraebsli to Programmer Humor · 10 months agomessage-square94fedilink
minus-square4am@lemm.eelinkfedilinkarrow-up6·10 months ago.“:>>” is “append null” right? Do you get a file with a single ASCII NUL or is it truly empty?
minus-squareTrailblazing Braille Taser@lemmy.dbzer0.comlinkfedilinkarrow-up14·10 months agoNot really. I believe : is the “true” builtin. So it’s like running a program that exits with zero and writes nothing to stdout. The >> streams the empty stdout into the named file.
minus-squareal177@lemmy.sdf.orglinkfedilinkarrow-up4·edit-210 months ago$ :|wc -c 0 $ touch /tmp/f; :>>/tmp/f; wc -c /tmp/f 0 /tmp/f
.“:>>” is “append null” right? Do you get a file with a single ASCII NUL or is it truly empty?
Not really. I believe : is the “true” builtin. So it’s like running a program that exits with zero and writes nothing to stdout. The >> streams the empty stdout into the named file.
$ :|wc -c 0 $ touch /tmp/f; :>>/tmp/f; wc -c /tmp/f 0 /tmp/f