fix grep -m2 pattern bug

fix-grep-m2-pattern.patch

@@ -0,0 +1,62 @@
+From b9a8047099d2388c15e6ad39e7b8c91c6633096c Mon Sep 17 00:00:00 2001
+From: Paul Eggert <eggert@cs.ucla.edu>
+Date: Fri, 9 Feb 2024 01:06:49 -0800
+Subject: =?UTF-8?q?grep:=20fix=20=E2=80=98grep=20-m2=20pattern=20<file=20>?=
+ =?UTF-8?q?/dev/null=E2=80=99?=
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Problem reported by Grisha Levit <https://bugs.gnu.org/68989>.
+* src/grep.c (grep, main): Don’t set done_on_match if -m is used.
+* tests/max-count-overread: Add a test case.
+---
+ src/grep.c               | 9 +++++++--
+ tests/max-count-overread | 6 ++++++
+ 2 files changed, 13 insertions(+), 2 deletions(-)
+
+diff --git a/src/grep.c b/src/grep.c
+index dab3be7..1256dfd 100644
+--- a/src/grep.c
++++ b/src/grep.c
+@@ -1558,7 +1558,11 @@ grep (int fd, struct stat const *st, bool *ineof)
+           if (binary_files == WITHOUT_MATCH_BINARY_FILES)
+             return 0;
+           if (!count_matches)
+-            done_on_match = out_quiet = true;
++            {
++              out_quiet = true;
++              if (max_count == INTMAX_MAX)
++                done_on_match = true;
++            }
+           nlines_first_null = nlines;
+           nul_zapper = eol;
+           skip_nuls = skip_empty_lines;
+@@ -2897,7 +2901,8 @@ main (int argc, char **argv)
+   if ((exit_on_match | dev_null_output) || list_files != LISTFILES_NONE)
+     {
+       count_matches = false;
+-      done_on_match = true;
++      if (max_count == INTMAX_MAX)
++        done_on_match = true;
+     }
+   out_quiet = count_matches | done_on_match;
+ 
+diff --git a/tests/max-count-overread b/tests/max-count-overread
+index 23c45cb..f829cc5 100755
+--- a/tests/max-count-overread
++++ b/tests/max-count-overread
+@@ -12,4 +12,10 @@ echo x > exp || framework_failure_
+ yes x | timeout 10 grep -m1 x > out || fail=1
+ compare exp out || fail=1
+ 
++# Make sure -m2 stops reading even when output is /dev/null.
++# In grep 3.11, it would continue reading.
++printf 'x\nx\nx\n' >in || framework_failure
++(grep -m2 x >/dev/null && head -n1) <in >out || fail=1
++compare exp out || fail=1
++
+ Exit $fail
+-- 
+cgit v1.1
+

grep.spec

@@ -1,6 +1,6 @@
 Name:    grep
 Version: 3.11
-Release: 1
+Release: 2
 Summary: A string search utility
 License: GPLv3+
 URL: http://www.gnu.org/software/grep/
@@ -9,6 +9,8 @@ Source1: color_grep.sh
 Source2: colorgrep.csh
 Source3: grepconf.sh
 
+Patch0001: fix-grep-m2-pattern.patch
+
 BuildRequires: gcc pcre2-devel texinfo gettext libsigsegv-devel automake
 Provides: /bin/egrep /bin/fgrep /bin/grep bundled(gnulib)
 
@@ -53,6 +55,9 @@ make check
 
 
 %changelog
+* Mon Jun 03 2024 wangziliang <wangziliang@kylinos.cn> - 3.11-2
+- fix grep -m2 pattern bug
+
 * Fri Jul 14 2023 dillon chen <dillon.chen@gmail.com> - 3.11-1
 - update version to 3.11