On Sat, Oct 31, 2009 at 12:25:32AM +0800, bill lam wrote: > On Fri, 30 Oct 2009, Kevin Kammer wrote: > > $ LC_ALL=C mutt > > AFAIK, gnu sort perform case sensitive sort for POSIX or C locale, > compare output from > > ls |sort # case insensitive in my locale > ls |LC_ALL=C sort # case sensitive >
Yes, ls |sort executed in my shell, with the default UTF-8 locale, is case insensitive. Regex searches in the shell or other programs behave as expected (i.e. lower-case search patterns are insensitive, whereas mixed-case patterns only match results with the same capitalization). So far as I can tell, Mutt is the only program that is forcing even lower-case patterns to be case-sensitive (unless I change the locale before launching mutt). This does not mean that it is Mutt's fault per-se; perhaps Mutt is more sensitive to some matter of strict API compliance that the rest of the system hacks around.
