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Diffstat (limited to 'doc/grep.texi')
| -rw-r--r-- | doc/grep.texi | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/doc/grep.texi b/doc/grep.texi index 5d779c11..78efb189 100644 --- a/doc/grep.texi +++ b/doc/grep.texi @@ -801,6 +801,13 @@ whitespace. A backslash escapes the next character, so it can be used to specify an option containing whitespace or a backslash. +The @code{GREP_OPTIONS} value does not affect whether @command{grep} +without file operands searches standard input or the working +directory; that is affected only by command-line options. For +example, the command @samp{grep PAT} searches standard input and the +command @samp{grep -r PAT} searches the working directory, regardless +of whether @code{GREP_OPTIONS} contains @option{-r}. + @item GREP_COLOR @vindex GREP_COLOR @r{environment variable} @cindex highlight markers @@ -1014,9 +1021,9 @@ instead of strict equality with@ 2. for lines containing a match to the given pattern. By default, @command{grep} prints the matching lines. A file named @file{-} stands for standard input. -If no input is specified, a recursive @command{grep} -searches the working directory @file{.}, and a -nonrecursive @command{grep} searches standard input. +If no input is specified, @command{grep} searches the working +directory @file{.} if given a command-line option specifying +recursion; otherwise, @command{grep} searches standard input. There are four major variants of @command{grep}, controlled by the following options. |