-#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
+ * Larger buffersize 3 June 1998 by Nicolai Langfeldt, based on a patch
+ * by Peeter Joot. This was also suggested by John Hudson.
+ * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org>
+ * - added Native Language Support
+ *
+ * from util-linux -- adapted for busybox by
+ * Erik Andersen <andersee@debian.org>. I ripped out Native Language
+ * Support, replaced getopt, added some gotos for redundant stuff.
*/
+#include "internal.h"
#include <linux/unistd.h>
#include <stdio.h>
#include <getopt.h>
+#include <stdlib.h>
+
+#if __GNU_LIBRARY__ < 5
-#define __NR_klog __NR_syslog
+#ifndef __alpha__
+# define __NR_klogctl __NR_syslog
+ static inline _syscall3(int, klogctl, int, type, char *, b, int, len);
+#else /* __alpha__ */
+#define klogctl syslog
+#endif
-#if defined(__GLIBC__)
-#include <sys/klog.h>
-#define klog klogctl
#else
-static inline _syscall3(int,klog,int,type,char *,b,int,len)
-#endif /* __GLIBC__ */
+# include <sys/klog.h>
+#endif
-const char dmesg_usage[] = "dmesg";
+static const char dmesg_usage[] = "dmesg [-c] [-n level] [-s bufsize]\n";
-int
-dmesg_main(int argc, char * * argv)
+int dmesg_main( int argc, char** argv )
{
-
- char buf[4096];
+ char *buf;
+ int bufsize=8196;
int i;
int n;
- int c;
int level = 0;
int lastc;
int cmd = 3;
+ int stopDoingThat;
- while ((c = getopt( argc, argv, "cn:" )) != EOF) {
- switch (c) {
- case 'c':
- cmd = 4;
- break;
- case 'n':
- cmd = 8;
- level = atoi(optarg);
- break;
- case '?':
- default:
- fprintf(stderr, "%s\n", dmesg_usage);
- exit(1);
- }
- }
- argc -= optind;
- argv += optind;
+ argc--;
+ argv++;
+
+ /* Parse any options */
+ while (argc && **argv == '-') {
+ stopDoingThat = FALSE;
+ while (stopDoingThat == FALSE && *++(*argv)) {
+ switch (**argv) {
+ case 'c':
+ cmd = 4;
+ break;
+ case 'n':
+ cmd = 8;
+ if (--argc == 0)
+ goto end;
+ level = atoi (*(++argv));
+ if (--argc > 0)
+ ++argv;
+ stopDoingThat = TRUE;
+ break;
+ case 's':
+ if (--argc == 0)
+ goto end;
+ bufsize = atoi (*(++argv));
+ if (--argc > 0)
+ ++argv;
+ stopDoingThat = TRUE;
+ break;
+ default:
+ goto end;
+ }
+ }
+ }
if (argc > 1) {
- fprintf(stderr, "%s\n", dmesg_usage);
- exit(1);
+ goto end;
}
if (cmd == 8) {
- n = klog( cmd, NULL, level );
+ n = klogctl( cmd, NULL, level );
if (n < 0) {
- perror( "klog" );
- exit( 1 );
+ goto klogctl_error;
}
- exit( 0 );
+ exit( TRUE );
}
- n = klog( cmd, buf, sizeof( buf ) );
+ if (bufsize < 4096) bufsize = 4096;
+ buf = (char*)malloc(bufsize);
+ n = klogctl( cmd, buf, bufsize );
if (n < 0) {
- perror( "klog" );
- exit( 1 );
+ goto klogctl_error;
}
lastc = '\n';
}
if (lastc != '\n')
putchar( '\n' );
- return 0;
+ exit( TRUE);
+end:
+ usage( dmesg_usage);
+ exit (FALSE);
+klogctl_error:
+ perror( "klogctl" );
+ exit( FALSE );
+
}