if [ -N file ]
then
echo "File has been modified since last read"
fi
if bash -c '[ -N file ]'
then
echo "File has been modified since last read"
fi
test -N
is not supported by POSIX, and there is no
straight forward way of simulating it. If you need this functionality,
look into which non-POSIX features your system has to allow this.
stat -c
, find -printf
, bash, ksh, and Python
are all possible options.
Note that atime
did not turn out to be as useful as
first imagined in 1970, and it's generally better not to rely on it.
None. If you expect your shell to support test -N
,
either explicitly specify it in the shebang, use a
# shellcheck shell=bash
directive, or ignore this
warning.
ShellCheck is a static analysis tool for shell scripts. This page is part of its documentation.