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Date: Mon, 8 Jun 2026 19:42:39 +0000
Subject: [PATCH] fix: dmesg_grep: avoid sigpipe on some systems (#519)
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 built from commit cc159fe7fdf77a82116a51d92e538172cb2dda30
 dated 2026-06-08 21:41:08 +0200
 by Stéphane Lesimple (speed47_github@speed47.net)

 Use 'grep -m 1' (works under Linux, busybox, BSD) instead of piping to head -n1
---
 spectre-meltdown-checker.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/spectre-meltdown-checker.sh b/spectre-meltdown-checker.sh
index b424da4..5176df9 100755
--- a/spectre-meltdown-checker.sh
+++ b/spectre-meltdown-checker.sh
@@ -13,7 +13,7 @@
 #
 # Stephane Lesimple
 #
-VERSION='26.36.0606627'
+VERSION='26.36.0608820'
 
 # --- Common paths and basedirs ---
 readonly VULN_SYSFS_BASE="/sys/devices/system/cpu/vulnerabilities"
@@ -3535,7 +3535,7 @@ dmesg_grep() {
         # dmesg truncated
         return 2
     fi
-    ret_dmesg_grep_grepped=$(dmesg 2>/dev/null | grep -E "$1" | head -n1)
+    ret_dmesg_grep_grepped=$(dmesg 2>/dev/null | grep -m 1 -E "$1")
     # not found:
     [ -z "$ret_dmesg_grep_grepped" ] && return 1
     # found, output is in $ret_dmesg_grep_grepped