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- This directory contains GNU sed.
-
- This sed may run slower than some UN*X seds but it supports a richer
- regular expression language than many seds, and has fewer arbitrary
- limits (for example, the hold space can grow arbitrarily).
-
- A faster version of sed (and of the GNU regex library) is in the
- works.
-
- See the file INSTALL for compilation and installation instructions.
-
-
- ABOUT BUGS
-
- Before reporting a bug, please check the list of oft-reported non-bugs
- (below).
-
- Bugs and comments may be sent to bug-gnu-utils@prep.ai.mit.edu.
-
- NONBUGS
-
- * `sed -n' and `s/regex/replace/p'
-
- Some versions of sed ignore the `p' (print) option of an `s' command
- unless the `-n' command switch has been specified. Other versions
- always honor the `p' option. GNU sed is the latter sort.
-
- * regexp syntax clashes
-
- GNU sed uses the Posix basic regular expression syntax. According to
- the standard, the meaning of some escape sequences is undefined in
- this syntax; notably `\|' and `\+'.
-
- As in all GNU programs that use Posix basic regular expressions, sed
- interprets these escape sequences as meta-characters. So, `x\+'
- matches one or more occurences of `x'. `abc\|def' matches either
- `abc' or `def'.
-
- This syntax may cause problems when running scripts written for other
- seds. Some sed programs have been written with the assumption that
- `\|' and `\+' match the literal characters `|' and `+'. Such scripts
- must be modified by removing the spurious backslashes if they are to
- be used with GNU sed.
-
- [If you have need of a free sed that understands the regexp
- syntax of your choice, the source to GNU sed may be a good place to
- start. Consider changing the call to re_set_syntax in function main
- in `sed.c'. The file regex.h contains an explanation of the
- supported syntax options.]
-
-