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Re: BUG?: (or what's going on?) test for NL == NL fails (bash-4.3.39(3)-
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From: |
Chris F.A. Johnson |
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Subject: |
Re: BUG?: (or what's going on?) test for NL == NL fails (bash-4.3.39(3)-release) |
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Date: |
Sun, 2 Aug 2015 17:27:55 -0400 (EDT) |
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User-agent: |
Alpine 2.10 (DEB 1266 2009-07-14) |
On Sun, 2 Aug 2015, Linda Walsh wrote:
also noticed this similar strange behavior:
used 'ord'** for this test (trying to compare decimal val of chars)
isatty () { test -c /proc/self/fd/1 ; }
ord () { local nl=""; isatty && nl="\n"; printf "%d$nl" "'$1" ; } ord () { local nl=""; isatty && nl="\n"; printf "%d$nl" "'$1" ; }
ord "$(printf "\n")"
Trailing newline are stripped from command substitution, making "$(printf
"\n")" and empty string.
If you want a newline, use:
ord $'\n'
--
Chris F.A. Johnson, <http://cfajohnson.com>