On Wed, 3 Jun 2020 20:26:41 -0700 Andi Kleen <a...@firstfloor.org> wrote:
> > % grep --version > grep (GNU grep) 3.4 > ... > % echo -n > foo > % grep -v foo foo ; echo $? > 1 > > Would expect it to exit with zero in this case, since foo is not in the > file. > > When the file is one byte it works as expected: > > % echo > foo > % grep -v foo foo ; echo $? > > 0 > % `0 if a line is selected, 1 if no lines were selected,' in manual. `0: One or more lines were selected. 1: No lines were selected.' in POSIX. > % echo -n > foo > % grep -v foo foo ; echo $? It returns no lines, so it seems reasonable to return 1.
