Converting to uppercase/lowercase in sed

[Maarten Litmaath]

In article <1990Aug16.232151.23436 at iwarp.intel.com>,
	merlyn at iwarp.intel.com (Randal Schwartz) writes:
)In article <3766 at umbc3.UMBC.EDU>, rostamia at umbc5 writes:
)| Is there a way to convert characters to uppercase or to lowercase in sed?
)| In EX the command
)| s/asdf/\U&/
)| changes the string asdf to ASDF, but ed and sed do not seem to be as
)| sophisticated as ex :-(
)| 
)| Any ideas?
)
)yeah, the not very well documented "y" command.
)
)	y/a-z/A-Z/

Doesn't work on SunOS 4.0.3c and a whole lotta other UNIX versions.  :-(

	y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/

POSIX had better fix this...
--
   "UNIX was never designed to keep people from doing stupid things, because
    that policy would also keep them from doing clever things."  (Doug Gwyn)