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, see IEEE Std 1003.1TM-2017
http://pubs.opengroup.org/onlinepubs/9699919799/
does not mention -E either.
To be on the safe side, don't allow it.
Reported-by: SZEDER Gábor <szeder.dev@xxxxxxxxx>
Signed-off-by: Torsten Bögershausen <tboegi@xxxxxx>
---
I am somewhat unsure if we should disable all options except -e -f -n
instead ?
/\bsed\s+-[^efn]/ and err 'Not portable option with sed. Only -n -e -f are portable';
That would cause a false positive in t9001 here:
"--cc-cmd=./cccmd-sed --suppress-cc=self"
which could either be fixed by an anchor:
/^\s*sed\s+-[^efn]/
Or by allowing '--' like this:
/\bsed\s+-[^-efn]/
Any thoughts, please ?
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..96b6afdeb8 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+-[Eail]/ and err 'Not portable option with sed. Only -e -f -n are portable';
/\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
