Initial revision

util-linux/dmesg.c

@@ -0,0 +1,95 @@
+#include "internal.h"
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+
+/* dmesg.c -- Print out the contents of the kernel ring buffer
+ * Created: Sat Oct  9 16:19:47 1993
+ * Revised: Thu Oct 28 21:52:17 1993 by faith@cs.unc.edu
+ * Copyright 1993 Theodore Ts'o (tytso@athena.mit.edu)
+ * This program comes with ABSOLUTELY NO WARRANTY.
+ * Modifications by Rick Sladkey (jrs@world.std.com)
+ * from util-linux; adapted for busybox
+ */
+
+#include <linux/unistd.h>
+#include <stdio.h>
+#include <getopt.h>
+
+#define __NR_klog __NR_syslog
+
+#if defined(__GLIBC__)
+#include <sys/klog.h>
+#define klog klogctl
+#else
+static inline _syscall3(int,klog,int,type,char *,b,int,len)
+#endif /* __GLIBC__ */
+
+const char			dmesg_usage[] = "dmesg";
+
+int
+dmesg_main(struct FileInfo * info, int argc, char * * argv)
+{
+
+   char buf[4096];
+   int  i;
+   int  n;
+   int  c;
+   int  level = 0;
+   int  lastc;
+   int  cmd = 3;
+
+   while ((c = getopt( argc, argv, "cn:" )) != EOF) {
+      switch (c) {
+      case 'c':
+	 cmd = 4;
+	 break;
+      case 'n':
+	 cmd = 8;
+	 level = atoi(optarg);
+	 break;
+      case '?':
+      default:
+	 usage(dmesg_usage);
+	 exit(1);
+      }
+   }
+   argc -= optind;
+   argv += optind;
+   
+   if (argc > 1) {
+      usage(dmesg_usage);
+      exit(1);
+   }
+
+   if (cmd == 8) {
+      n = klog( cmd, NULL, level );
+      if (n < 0) {
+	 perror( "klog" );
+	 exit( 1 );
+      }
+      exit( 0 );
+   }
+
+   n = klog( cmd, buf, sizeof( buf ) );
+   if (n < 0) {
+      perror( "klog" );
+      exit( 1 );
+   }
+
+   lastc = '\n';
+   for (i = 0; i < n; i++) {
+      if ((i == 0 || buf[i - 1] == '\n') && buf[i] == '<') {
+	 i++;
+	 while (buf[i] >= '0' && buf[i] <= '9')
+	    i++;
+	 if (buf[i] == '>')
+	    i++;
+      }
+      lastc = buf[i];
+      putchar( lastc );
+   }
+   if (lastc != '\n')
+      putchar( '\n' );
+   return 0;
+}