On Fri, May 01, 2009 at 11:33:08AM -0700, Haibo Xu wrote:
>
> > #!/bin/sh
> >
> > IFS=$' \t\n'
IFS is not supposed to interpret escape sequences. Quoting POSIX
1419 IFS (Input Field Separators.) A string
treated as a list of characters that is used for
1420 field splitting and to split lines
into fields with the read command. If IFS is not
1421 set, the shell shall behave as if the
value of IFS is <space>, <tab>, and
1422 <newline>; see Section 2.6.5 (on page
2244). Implementations may ignore the |
1423 value of IFS in the environment at the
time the shell is invoked, treating IFS as |
1424 if it were not set.
|
So if you want it to have a tab and newline you need to specify
them literally, or use something that does interpret escapes,
like
IFS=$(echo '\n\t $')
Cheers,
--
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Email: Herbert Xu ~{PmV>HI~} <[email protected]>
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