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Rick Jelliffe wrote: > > Sure, lets make XML unsuitable for use in UNIX pipes by allowing ^D. > And for Perl and Python text-processing programs that use standard in and > expect EOF (^D or ^Z). On Unix, ^D is only interpreted as an end-of-file signal when it's typed at a terminal, not when it's stored in a file or transmitted over a socket or pipe. Similarly for ^C, ^Z, ^\, ^S, ^Q, and other control characters; these have no special meaning as far as the file system or stdio are concerned. CP/M and MS-DOS on the other hand *do* interpret ^Z as an EOF character in text files. CP/M doesn't keep track of file sizes in bytes, only the number of blocks, so it needs an in-band EOF indicator. Some MS-DOS utilities inherited this convention from CP/M (TYPE, EDLIN.COM) but Windows seems to have abandoned it; EDIT.COM, NOTEPAD.EXE, and WORDPAD.EXE all have no trouble editing text files with ^Z's in them. --Joe English jenglish@f...
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