From: Torsten Bögershausen <tboegi@xxxxxx>
>From `man sed` (on a Mac OS X box):
The -E, -a and -i options are non-standard FreeBSD extensions and may not be available
on other operating systems.
>From `man sed` on a Linux box:
REGULAR EXPRESSIONS
POSIX.2 BREs should be supported, but they aren't completely because of
performance problems. The \n sequence in a regular expression matches the newline
character, and similarly for \a, \t, and other sequences.
The -E option switches to using extended regular expressions instead; the -E option
has been supported for years by GNU sed, and is now included in POSIX.
Well, there are still a lot of systems out there, which don't support it.
Beside that, IEEE Std 1003.1TM-2017, see
http://pubs.opengroup.org/onlinepubs/9699919799/
does not mention -E either.
To be on the safe side, don't allow -E (or -r, which is GNU).
Change check-non-portable-shell.pl to only accept the portable options:
sed [-n] [-e command] [-f command_file]
Reported-by: SZEDER Gábor <szeder.dev@xxxxxxxxx>
Helped-by: Eric Sunshine <sunshine@xxxxxxxxxxxxxx>
Helped-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
Signed-off-by: Torsten Bögershausen <tboegi@xxxxxx>
---
t/check-non-portable-shell.pl | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/t/check-non-portable-shell.pl b/t/check-non-portable-shell.pl
index b45bdac688..6c798608a9 100755
--- a/t/check-non-portable-shell.pl
+++ b/t/check-non-portable-shell.pl
@@ -35,7 +35,7 @@ sub err {
chomp;
}
- /\bsed\s+-i/ and err 'sed -i is not portable';
+ /\bsed\s+-[^efn]\s+/ and err 'Not portable option with sed (use only [-n] [-e command] [-f command_file])';
/\becho\s+-[neE]/ and err 'echo with option is not portable (use printf)';
/^\s*declare\s+/ and err 'arrays/declare not portable';
/^\s*[^#]\s*which\s/ and err 'which is not portable (use type)';
--
2.20.1.2.gb21ebb671
