Hi David, On Thu, May 16, 2019 at 6:00 PM David Laight <David.Laight@xxxxxxxxxx> wrote: > > From: Masahiro Yamada > > Sent: 15 May 2019 18:55 > ... > > > xargs basename -a -- | sort | ... > > > > Sorry for my ignorance, but could you > > teach me the effect of "--" ? > > > > I sometimes use "--" as a separator > > when there is ambiguity in arguments > > for example, "git log <revision> -- <path>" > > > > In this case, what is intended by "--"? > > The '--' stops getopt() from parsing any more parameters. > Useful things like 'grep -- -q' which will search for the > string '-q' rather than treating it as a command line option. > > This is all made more horrid by a decision by the writers > of glibc getopt() to 'permute' argv[] so that 'options' > can follow 'nonoptions' ie it converts: > prog file -arg > to > prog -arg file > The only program the historically allowed 'late' options > was 'rlogin hostname -l username'. > This is just broken..... Ah, I see. This does not happen for modules.order or modules.builtin, but I will use '--' just in case. Thanks. > David > > - > Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK > Registration No: 1397386 (Wales) -- Best Regards Masahiro Yamada
