allow people to display dmesg output without syslog levels

diff --git a/util-linux/Config.in b/util-linux/Config.in
index 501ed6b..65d6708 100644 (file)
--- a/util-linux/Config.in
+++ b/util-linux/Config.in
@@ -17,6 +17,26 @@ config CONFIG_DMESG
          are also logged to the system console.  Enable this option if you
          wish to enable the 'dmesg' utility.
 
+config CONFIG_FEATURE_DMESG_PRETTY
+       bool "pretty dmesg output"
+       default y
+       depends on CONFIG_DMESG
+       help
+         If you wish to scrub the syslog level from the output, say 'Y' here.
+         The syslog level is a string prefixed to every line with the form "<#>".
+
+         With this option you will see:
+           # dmesg
+           Linux version 2.6.17.4 .....
+           BIOS-provided physical RAM map:
+            BIOS-e820: 0000000000000000 - 000000000009f000 (usable)
+
+         Without this option you will see:
+           # dmesg
+           <5>Linux version 2.6.17.4 .....
+           <6>BIOS-provided physical RAM map:
+           <6> BIOS-e820: 0000000000000000 - 000000000009f000 (usable)
+
 config CONFIG_FBSET
        bool "fbset"
        default n

diff --git a/util-linux/dmesg.c b/util-linux/dmesg.c
index 2b59ee2..ecfd906 100644 (file)
--- a/util-linux/dmesg.c
+++ b/util-linux/dmesg.c
@@ -1,9 +1,9 @@
 /* vi: set sw=4 ts=4: */
 /*
- * 
  * dmesg - display/control kernel ring buffer.
  *
- * Copyring 2006 Rob Landley <rob@landley.net>
+ * Copyright 2006 Rob Landley <rob@landley.net>
+ * Copyright 2006 Erik Andersen <andersen@codepoet.org>
  *
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
@@ -28,8 +28,24 @@ int dmesg_main(int argc, char *argv[])
                buf = xmalloc(len);
                if (0 > (len = klogctl(3 + (flags & 1), buf, len)))
                        bb_perror_msg_and_die("klogctl");
-               write(1,buf,len);
+
+#ifdef CONFIG_FEATURE_DMESG_PRETTY
+               {
+                       char newline = '\n';
+                       int i;
+                       for (i=0; i<len; ++i) {
+                               if (newline == '\n' && buf[i] == '<')
+                                       i += 3; /* skip <#> */
+                               putchar(newline=buf[i]);
+                       }
+                       if (newline != '\n') putchar('\n');
+               }
+#else
+               write(1, buf, len);
                if (len && buf[len-1]!='\n') putchar('\n');
+#endif
+
+               if (ENABLE_FEATURE_CLEAN_UP) free(buf);
        }
 
        return 0;