On 7/22/19 2:48 PM, Stephane Chazelas wrote: > 2019-07-23 00:56:59 +0700, k...@munnari.oz.au: > [...] >> POSIX specifies that printf(1) has no options, and by not >> specifying that it is intended to comply with XBD 12.2 effectivly >> says that it is not. That is, in printf, the first arg is >> always the format string, whatever it contains. > [...] > > If that was the case, then that would be bug in the POSIX > specification. I can't find a single printf implementations > where printf -- outputs -- (I tried bash, zsh, ksh93, GNU, yash, > busybox, busybox ash, Solaris /bin/printf). > > Even if POSIX didn't mandate > > printf -- -%s x > > to output -x, I'd say it would be a bug in the POSIX > specification (it looks like it is).
POSIX _does_ mandate 'printf -- -%s x' to output exactly '-x', by virtue of the fact that it mandates all utilities (other than special builtins) with the specification 'OPTIONS None.' to parse and ignore '--' as the end of options, whether or not the utility takes options as an extension. If NetBSD broke that behavior, that is a bug in NetBSD's shell, not bash nor POSIX. -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3226 Virtualization: qemu.org | libvirt.org
signature.asc
Description: OpenPGP digital signature
