This post shows how to use iteration and condition in fish shell.
For example, as to each file in current directory, let's check if 400KB < the file size and run some commands.
for x in *
if test -f $x && test 800 -lt (du "$x" | cut -f1)
some commands "$x"
end
end
First, for
x in *
gives each file as $x
. Then if
test
is used to check (1) if the input is file and (2) the file size.
Besides, "800" means 400 * 1024 / 512
, where the block size is 512 byte.
Well, one-liner is also available.
for x in *; if test -f $x && test 800 -lt (du "$x" | cut -f1); somecommand "$x"; end; end;
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