diff options
Diffstat (limited to 'doc/grep.texi')
| -rw-r--r-- | doc/grep.texi | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/doc/grep.texi b/doc/grep.texi index 58e7f483..73151e4e 100644 --- a/doc/grep.texi +++ b/doc/grep.texi @@ -240,6 +240,8 @@ Word-constituent characters are letters, digits, and the underscore. @opindex --line-regexp @cindex match the whole line Select only those matches that exactly match the whole line. +For a regular expression pattern, this is like parenthesizing the +pattern and then surrounding it with @samp{^} and @samp{$}. (@option{-x} is specified by POSIX.) @end table @@ -1091,8 +1093,8 @@ Interpret the pattern as an extended regular expression (ERE). @opindex -F @opindex --fixed-strings @cindex matching fixed strings -Interpret the pattern as a list of fixed strings, separated -by newlines, any of which is to be matched. +Interpret the pattern as a list of fixed strings (instead of regular +expressions), separated by newlines, any of which is to be matched. (@option{-F} is specified by POSIX.) @item -P @@ -1134,7 +1136,7 @@ The following description applies to extended regular expressions; differences for basic regular expressions are summarized afterwards. Perl regular expressions give additional functionality, and are documented in the @i{pcresyntax}(3) and @i{pcrepattern}(3) manual pages, -but may not be available on every system. +but work only if PCRE is available in the system. @menu * Fundamental Structure:: |