carlos e r vyjwdtrpcautelefonicanet begin pgp signed message hash sha1 sunday 20080217 2335 0100 anders johansson wrote actually eof also ascii character indicates end file text files dont remember z linux though well ascii character defined something never read file ascii characters read character write file cause file stop read endoffile ascii character 0x03 end text 0x04 end message arent eof think obvious binary file doesnt care ascii encodings 127 characters ascii occur anywhere example jpeg image would disaster caused endoffile one differences text binary files text files contain control characters new line tabs end file marker yes character printable displayable character right application program use even recognize eof something else programs fail reading file middle said found eof middle used trick data files read programs pascal msdos wrote beginning file small string describing type file program used followed eof char real binary data run type datafile printed lines stopped without corrupting screen cheers carlos e r begin pgp signature version gnupg v204svn0 gnulinux id8dbqfhul3vttmyhg2nr9urag6uaj9vibouatjonowzc5wpgdbi2stgacfcz9r qyljhtwpc16ct1y6pfeasqc aaw end pgp signature wed 06 aug 2008 173608 0100 opensuse amavisd warning failure