-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 According to Ralf Wildenhues on 4/7/2008 12:18 AM: | Hello Russ, | | * Russ Allbery wrote on Mon, Apr 07, 2008 at 03:04:11AM CEST: |> I believe posh was explicitly written as a POSIX compliance test suite for |> shell scripts, and hence doesn't implement any extensions other than those |> so ubiquitous that they're de facto standards. There's discussion right |> now about whether numeric signals fall into that category (one problem is |> that only a limited set of those numbers are portable, since signal |> numbers are not the same in different versions of UNIX, although I believe |> the XSI extension spells out which ones are portable). On the other hand, the version of 'ash' that ships with cygwin doesn't understand signal names - ONLY signal numbers. In other words, you can't portably do trap - EXIT | | Then I suppose that will not improve the situation wrt. Autoconf- | generated scripts. They trap 13 which is not listed as portable. | Does anybody know of a system where that is not SIGPIPE? I've | so far thought of that as ubiquitous. Maybe it is still possible to be portable to both camps. Autoconf could do a quick test as part of shell sanitization on whether trap/kill understands numbers or names, then define variables $ac_sigpipe, $ac_sigkill, $ac_sighup, ... that expand to the correct number and/or name. Then we could replace: trap cleanup 0 with: trap cleanup $ac_sigexit But yes, it would be nicer if posh would accept the XSI list from POSIX (1, 2, 3, 6, 9, 14, 15), plus 0 for EXIT and 13 for SIGPIPE. - -- Don't work too hard, make some time for fun as well! Eric Blake ebb9@xxxxxxx -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (Cygwin) Comment: Public key at home.comcast.net/~ericblake/eblake.gpg Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkf8ObUACgkQ84KuGfSFAYDahQCfVDrC0JBWuEjhS/0Ocdc3lEf9 PFQAoJWgv8tjiyRfVwogBqjGltl58SOD =mWdK -----END PGP SIGNATURE----- _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf
