On Sat, 21 Sep 2013 08:51:38 +0200 Lionel Cons wrote:
> On 19 September 2013 18:53, Roland Mainz <[email protected]> wrote:
> > On Thu, Sep 19, 2013 at 6:08 PM, Glenn Fowler <[email protected]> wrote:
> >>
> >> can someone post urls for the man pages for
> >> readlink(1)
> >> realpath(1)
> >
> > 1. The relevant references:
> > The all-in-one manpage for busybox can be found here:
> > http://busybox.net/downloads/BusyBox.html
> >
> > FreeBSD readlink(1):
> > http://www.freebsd.org/cgi/man.cgi?query=readlink&apropos=0&sektion=1&manpath=FreeBSD+9.1-RELEASE&arch=default&format=html
> > FreeBSD realpath(1):
> > http://www.freebsd.org/cgi/man.cgi?query=realpath&apropos=0&sektion=1&manpath=FreeBSD+9.1-RELEASE&arch=default&format=html
both man pages describe the operands as
[ path ... ]
[ file ... ]
but only the realpath says what happens if file is omitted (. is used)
neither say what happens if more than one path/file operand is specified
readlink annoyingly inverts -q/-v -- diagnostics are off by default -- *what
other posix utility does that*
so what does readlink do in silent mode when it is invoked with
readlink is-a-symlink is-not-a-symlink is-another-symlink
from the refs roland supplied the gnu readlink and realpath are very close
modulo defaults
mainly readlink with no --canonicalize* options is in "readlink" mode,
otherwise "realpath" mode
and the annoying one: readlink by default suppresses diagnostics
so I need to know what happens on bsd and gnu for readlink and realpath for
various combinations of
0,1,2,3 path/file operands and within that various combinations of
is-a-symlink is-not-a-symlink is-an-existing-path
is-not-an-existing-path
in particular when there are multiple operands and an error occurs does the
output have a blank line to mark the errors?
my intention is to provide one implementation of realpath with a union of the
ast --dirfd=fd + gnu readlink/realpath + bsd readlink/realpath options
and an additional --readlink option that puts it into "readlink" mode (operand
is a symlink, diagnostics suppressed),
and a note that argv[0]=="*readlink" => --readlink
this will given us one implementation and one document to manage
_______________________________________________
ast-developers mailing list
[email protected]
http://lists.research.att.com/mailman/listinfo/ast-developers
