dmesg: add -r option to print raw format even when FEATURE_DMESG_PRETTY is enabled

Similar to the "big" util-linux version. For !DMESG_PRETTY, the option is accepted
(but ignored) as well, for compatibility reasons.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/util-linux/dmesg.c b/util-linux/dmesg.c
index 81ba1c9d1..e543446c1 100644
--- a/util-linux/dmesg.c
+++ b/util-linux/dmesg.c
@@ -16,6 +16,7 @@
 //usage:     "\n        -c              Clear ring buffer after printing"
 //usage:     "\n        -n LEVEL        Set console logging level"
 //usage:     "\n        -s SIZE         Buffer size"
+//usage:     "\n        -r              Print raw message buffer"
 
 #include <sys/klog.h>
 #include "libbb.h"
@@ -29,11 +30,12 @@ int dmesg_main(int argc UNUSED_PARAM, char **argv)
         enum {
                 OPT_c = 1 << 0,
                 OPT_s = 1 << 1,
-                OPT_n = 1 << 2
+                OPT_n = 1 << 2,
+                OPT_r = 1 << 3
         };
 
         opt_complementary = "s+:n+"; /* numeric */
-        opts = getopt32(argv, "cs:n:", &len, &level);
+        opts = getopt32(argv, "cs:n:r", &len, &level);
         if (opts & OPT_n) {
                 if (klogctl(8, NULL, (long) level))
                         bb_perror_msg_and_die("klogctl");
@@ -55,7 +57,7 @@ int dmesg_main(int argc UNUSED_PARAM, char **argv)
                 return EXIT_SUCCESS;
 
 
-        if (ENABLE_FEATURE_DMESG_PRETTY) {
+        if (ENABLE_FEATURE_DMESG_PRETTY && !(opts & OPT_r)) {
                 int last = '\n';
                 int in = 0;