linux-kernel - [PATCH 08/14] blockconsole: Allow to pass a device file path to bcon

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu,  9 May 2013 16:43:06 -0400
From:	Joern Engel <joern@...fs.org>
To:	linux-kernel@...r.kernel.org
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Jens Axboe <axboe@...nel.dk>, Borislav Petkov <bp@...en8.de>,
	Takashi Iwai <tiwai@...e.de>, Joern Engel <joern@...fs.org>
Subject: [PATCH 08/14] blockconsole: Allow to pass a device file path to bcon_tail

From: Takashi Iwai <tiwai@...e.de>

... instead of always looking through all devices.

Minor tweak: Moved the "CANDIDATES=" line below Takashi's new code.

Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Joern Engel <joern@...fs.org>
---
 Documentation/block/blockconsole/bcon_tail |   15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/Documentation/block/blockconsole/bcon_tail b/Documentation/block/blockconsole/bcon_tail
index eb3524b..70926c6 100755
--- a/Documentation/block/blockconsole/bcon_tail
+++ b/Documentation/block/blockconsole/bcon_tail
@@ -58,6 +58,21 @@ end_of_log() {
 # HEADER contains a newline, so the funny quoting is necessary
 HEADER='
 Linux blockconsole version 1.1'
+
+DEV="$1"
+if [ -n "$DEV" ]; then
+	if [ ! -b "$DEV" ]; then
+		echo "bcon_tail: No block device file $DEV"
+		exit 1
+	fi
+	if [ "`head -c32 $DEV`" != "$HEADER" ]; then
+		echo "bcon_tail: Invalid device file $DEV"
+		exit 1
+	fi
+	end_of_log $DEV
+	exit 0
+fi
+
 CANDIDATES=`lsscsi |sed 's|.*/dev|/dev|'`
 
 for DEV in $CANDIDATES; do
-- 
1.7.10.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/