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doc: clarify sed buffer limit

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* doc/autoconf.texi (Limitations of Usual Tools):
That 4000-byte limit applies to output and internal buffers, too.
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Paul Eggert 2012-01-05 11:00:45 -08:00
parent b69f4c2834
commit 3b4b3ee585
2 changed files with 9 additions and 2 deletions
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@ -1,3 +1,9 @@
2012-01-05 Paul Eggert <eggert@cs.ucla.edu>
doc: clarify sed buffer limit
* doc/autoconf.texi (Limitations of Usual Tools):
That 4000-byte limit applies to output and internal buffers, too.
2012-01-03 Paul Eggert <eggert@cs.ucla.edu>
maint: update copyright year

5
doc/autoconf.texi
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@ -19256,8 +19256,9 @@ $ @kbd{echo a | sed 's/x/x/;;s/x/x/'}
sed: 1: "s/x/x/;;s/x/x/": invalid command code ;
@end example
Input should not have unreasonably long lines, since some @command{sed}
implementations have an input buffer limited to 4000 bytes. Likewise,
Some @command{sed} implementations have a buffer limited to 4000 bytes,
and this limits the size of input lines, output lines, and internal
buffers that can be processed portably. Likewise,
not all @command{sed} implementations can handle embedded @code{NUL} or
a missing trailing newline.