Converting to uppercase/lowercase in sed

[Randal Schwartz]

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/

uppercases the pattern space.  You'll have to juggle the pattern and
hold spaces if you want just part of a line uppercased.

Or get Perl. :-)
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