is grep -i broken?

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Operating Systems Linux is grep -i broken?

07-14-2006

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is grep -i broken?

Is grep -i (case insensitive) broken? If not, can someone explain to me why the third grep fails with no output?

Code:

$ echo DBI DBH | grep DB[IH]
DBI DBH

$ echo dbi dbh | grep -i 'DB[IH]'
dbi dbh

$ echo DBI DBH | grep -i DB[IH]

$ grep --version
grep (GNU grep) 2.5.1

Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.
Dies ist freie Software; in den Quellen befinden sich die Lizenzbedingungen.
Es gibt KEINERLEI Garantie; nicht einmal für die TAUGLICHKEIT oder
VERWENDBARKEIT F�R EINEN BESTIMMTEN ZWECK.

Last edited by tphyahoo; 07-14-2006 at 08:08 AM..

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07-14-2006

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Interesting. It works fine for me.

Code:

[/tmp]$ echo DBI DBH | grep  DB[IH]
DBI DBH
[/tmp]$ echo DBI DBH | grep -i  DB[IH]
DBI DBH
[/tmp]$ grep --version
grep (GNU grep) 2.5.1

Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

[/tmp]$

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07-14-2006

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oh this is ugly. I figured out why though.

$ echo DBI DBH | grep -i DB[IH]
$ env | grep LANG
LANG=de_DE.UTF-8
$ LANG=de_DE.ISO-8859-1
$ echo DBI DBH | grep -i DB[IH]
DBI DBH

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