Re: binfmt_script and ^M

From: Paul Flinders (P.Flinders@ftel.co.uk)
Date: Mon Mar 05 2001 - 11:18:22 EST


Jeff Mcadams wrote:

> Also sprach Rik van Riel
> >On Mon, 5 Mar 2001, John Kodis wrote:
> >> On Mon, Mar 05, 2001 at 08:40:22AM -0500, Richard B. Johnson wrote:
> >> > Somebody must have missed the boat entirely. Unix does not, never
> >> > has, and never will end a text line with '\r'.
>
> >> Unix does not, never has, and never will end a text line with ' ' (a
> >> space character) or with \t (a tab character). Yet if I begin a
> >> shell script with '#!/bin/sh ' or '#!/bin/sh\t', the training white
> >> space is striped and /bin/sh gets exec'd. Since \r has no special
> >> significance to Unix, I'd expect it to be treated the same as any
> >> other whitespace character -- it should be striped, and /bin/sh
> >> should get exec'd.
>
> >Makes sense, IMHO...
>
> That only makes sense if:
> #!/bin/shasdf\n
> would also exec /bin/sh.

POSIX disagrees with you (accd to the manual page)

$ man isspace
       ....
       isspace()
              checks for white-space characters. In the "C" and
              "POSIX" locales, these are: space, form-feed
              ('\f'), newline ('\n'), carriage return ('\r'),
              horizontal tab ('\t'), and vertical tab ('\v').

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