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Groups > gnu.bash.bug > #11381
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| From | Linda Walsh <bash@tlinx.org> |
| Newsgroups | gnu.bash.bug |
| Subject | Re: -e does not take effects in subshell |
| Date | Tue, 18 Aug 2015 13:49:53 -0700 |
| Lines | 42 |
| Approved | bug-bash@gnu.org |
| Message-ID | <mailman.8570.1439931010.904.bug-bash@gnu.org> (permalink) |
| References | <BLU176-W28809FB59FF9274B34D871D67F0@phx.gbl> <20150811135056.GD4309@eeg.ccf.org> <BLU176-W27103575D91F4EF315336FD67D0@phx.gbl> <55CC26A7.10000@redhat.com> |
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| Cc | Greg Wooledge <wooledg@eeg.ccf.org>, PRC <ijkxyz@msn.com>, "bug-bash@gnu.org" <bug-bash@gnu.org> |
| To | Eric Blake <eblake@redhat.com> |
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Eric Blake wrote: > Like it or not, it is the historical behavior standardized by POSIX. ---- This is not true. POSIX no longer documents historical behavior, but now dictates new, historically-incompatible behaviors for a variety of features in a variety of products (not just BASH). As such, since the original mission statement of POSIX was to be *descriptive* of what was (so a compatible standard could be provided), and that is NOT what the new POSIX (post 2001-2003) has as a mission statement, I assert the new "POSIX" is simply a new organization that got the rights to use the name but use it as a "club" to force products to their new, dumbed-down and maladaptive behaviors. Ex: rmx -fr (alias to rm --one-file-system -fr, since rm lacks the -x switch like 'find, cp, mv, et al.) no longer works to clean out a directory && stay on *one* file system. Now rm will delete things on any number of file systems, as long as they correspond to a cmdline argument. Many people said to use rm -xfr * to delete contents... but each object in 'rm' can be on a different file system. Worse "rm -xfr **". The workaround -- to use non-posix options of 'find' (or have find call 'rm' for each qualified object. Please don't spread the lies that the *current* POSIX specs only reflect historical behavior because it is not true. > It > is NOT intuitive, and our advice is "DON'T USE set -e - IT WON'T DO WHAT > YOU WANT". We can't change the behavior, because it would break scripts > that rely on the POSIX-specified behavior. === I used the old behavior for over 10 years in various SH-compat shells, and it *WAS* useful. POSIX changed it to be unuseful. >
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Re: -e does not take effects in subshell Linda Walsh <bash@tlinx.org> - 2015-08-18 13:49 -0700
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