Re: no trailing newline causes read to fail

[Stephane Chazelas]

On Mon, Oct 04, 2004 at 09:50:34AM -0400, Paul Jarc wrote:
[...]
> > No, E4 is about read being run in a subshell. OP's problem is
> > for read on non-text input (an unterminated line causes read to
> > exit with a non-zero exit status).
> 
> No.  "read" still sets the variable even in this case, so it does not
> explain the complaint above about the variable being empty.  That is
> explained by FAQ entry E4.
[...]

All right, OK, sorry, I missed that part of the OP's post. The
example he gave actually didn't involve a sub-process. He must
have ommited the important thing, he probably used

paste /tmp/f | while read line; do ...; done

instead of:

while read line; do ...; done < /tmp/f

[OT:
  It's true that most shells set the variable when the input line
  is not terminated. But with some versions of ksh, it is
  truncated:

  $ printf foo | /usr/dt/bin/dtksh -c 'read line; echo "$? $line"'
  1 fo

  (dtksh on Solaris 8 is ksh93d)
]

-- 
Stephane

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