Re: [PATCH] echo: fix octal escaping with \1...\7

[Stephane CHAZELAS <stephane_chazelas@xxxxxxxx>]

2011-10-25, 17:58(-04), Mike Frysinger:
> POSIX states that octal escape sequences should take the form \0num
> when using echo.

Only with the XSI option (Unix), for POSIX, echo "\whatever" is
unspecified. But as far as I can tell even with XSI, "echo
'\123'" is unspecified as well, so dash is free to do what it
likes here.

> dash however additionally treats \num as an octal
> sequence.  This breaks some packages (like libtool) who attempt to
> use strings with these escape sequences via variables to execute sed
> (since sed ends up getting passed a byte instead of a literal \1).

Given that the result of  

echo "\123" is unspecified, those scripts would not be POSIX and
they are those to be fixed.

-- 
Stephane

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