Fix some compiler warnings emitted by gcc-4.8.0

[oweals/busybox.git] / util-linux / dmesg.c

diff --git a/util-linux/dmesg.c b/util-linux/dmesg.c
index b0dc592d2263893ae60a38b74c2d13c5c6c1eb29..81ba1c9d14c59870f1e5e65732bd04572be55df4 100644 (file)
--- a/util-linux/dmesg.c
+++ b/util-linux/dmesg.c
@@ -6,8 +6,17 @@
  * Copyright 2006 Rob Landley <rob@landley.net>
  * Copyright 2006 Bernhard Reutner-Fischer <rep.nop@aon.at>
  *
- * Licensed under GPLv2, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2, see file LICENSE in this source tree.
  */
+
+//usage:#define dmesg_trivial_usage
+//usage:       "[-c] [-n LEVEL] [-s SIZE]"
+//usage:#define dmesg_full_usage "\n\n"
+//usage:       "Print or control the kernel ring buffer\n"
+//usage:     "\n       -c              Clear ring buffer after printing"
+//usage:     "\n       -n LEVEL        Set console logging level"
+//usage:     "\n       -s SIZE         Buffer size"
+
 #include <sys/klog.h>
 #include "libbb.h"
 
@@ -45,20 +54,24 @@ int dmesg_main(int argc UNUSED_PARAM, char **argv)
        if (len == 0)
                return EXIT_SUCCESS;
 
-       /* Skip <#> at the start of lines, and make sure we end with a newline */
 
        if (ENABLE_FEATURE_DMESG_PRETTY) {
                int last = '\n';
                int in = 0;
 
-               do {
-                       if (last == '\n' && buf[in] == '<')
-                               in += 3;
-                       else {
+               /* Skip <[0-9]+> at the start of lines */
+               while (1) {
+                       if (last == '\n' && buf[in] == '<') {
+                               while (buf[in++] != '>' && in < len)
+                                       ;
+                       } else {
                                last = buf[in++];
-                               bb_putchar(last);
+                               putchar(last);
                        }
-               } while (in < len);
+                       if (in >= len)
+                               break;
+               }
+               /* Make sure we end with a newline */
                if (last != '\n')
                        bb_putchar('\n');
        } else {