-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 According to Martin Knapp-Cordes on 10/22/2008 12:17 PM: > This means that the MATLAB startup shell script is indeed > not Open Group compliant. Obviously, no change will be > necessary to the script if the proposed fixes are approved, > as they appear to be. > > However, this non-compliance is somewhat of a concern and a > minimum time frame for a fix has been established, but > the actual details still need to be worked out.
As pointed out earlier in this thread, and also in http://www.gnu.org/software/autoconf/manual/autoconf.html#Limitations-of-Usual-Tools, expr X"$string" : X'regex' coupled with any necessary postprocessing to account for the leading X, provides a portable solution for the case when $string starts with -, across ALL known implementations of expr (whether or not they obey the POSIX rules to honor --, and whether or not they provide options as extensions to POSIX). In the case of numeric analysis, you can use a leading '0 +' to avoid problems with interpreting a negative number as an option. And finally, in the particular example that started this thread: if [ `expr "$lscmd" : '.*->.*'` -ne 0 ]; then # do stuff here... fi can be rewritten as the following faster alternative (completely avoiding a fork, and any expr bugs, altogether): case $lscmd in *'->'* ) ;; *) # do stuff here... ;; esac - -- Don't work too hard, make some time for fun as well! Eric Blake [EMAIL PROTECTED] -----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 iEYEARECAAYFAkj/6BUACgkQ84KuGfSFAYB5OgCeKQfVV0SY9ktVq5VCSIaSNj7F 5+sAnR7Sgmg/WZOJ+fXSLEKUpPVSUcSQ =hKqD -----END PGP SIGNATURE----- _______________________________________________ Bug-coreutils mailing list Bug-coreutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-coreutils
