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-rw-r--r--doc/grep.texi4
1 files changed, 4 insertions, 0 deletions
diff --git a/doc/grep.texi b/doc/grep.texi
index b9688c82..b073fa76 100644
--- a/doc/grep.texi
+++ b/doc/grep.texi
@@ -341,6 +341,10 @@ Scanning each input file stops upon first match.
@opindex --max-count
@cindex max-count
Stop after the first @var{num} selected lines.
+If @var{num} is zero, @command{grep} stops right away without reading input.
+A @var{num} of @minus{}1 is treated as infinity and @command{grep}
+does not stop; this is the default.
+
If the input is standard input from a regular file,
and @var{num} selected lines are output,
@command{grep} ensures that the standard input is positioned