-#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>
-#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__ */
+#if __GNU_LIBRARY__ < 5
+#ifndef __alpha__
+# define __NR_klogctl __NR_syslog
+ static inline _syscall3(int, klogctl, int, type, char *, b, int, len);
+#else /* __alpha__ */
+#define klogctl syslog
+#endif
+#else
+# include <sys/klog.h>
+#endif
-static const char dmesg_usage[] = "dmesg [-c] [-n level]\n";
+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;
+ int bufsize=8196;
+ int i;
+ int n;
+ int level = 0;
+ int lastc;
+ int cmd = 3;
+ int stopDoingThat;
- char buf[4096];
- int i;
- int n;
- int level = 0;
- int lastc;
- int cmd = 3;
-
- argc--;
- argv++;
+ argc--;
+ argv++;
/* Parse any options */
while (argc && **argv == '-') {
- while (*++(*argv))
+ stopDoingThat = FALSE;
+ while (stopDoingThat == FALSE && *++(*argv)) {
switch (**argv) {
case 'c':
cmd = 4;
if (--argc == 0)
goto end;
level = atoi (*(++argv));
- --argc;
- ++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 (cmd == 8) {
- n = klog (cmd, NULL, level);
- if (n < 0) {
- perror ("klog");
- exit (FALSE);
}
- exit (TRUE);
}
+
+ if (argc > 1) {
+ goto end;
+ }
- n = klog (cmd, buf, sizeof (buf));
- if (n < 0) {
- perror ("klog");
- exit (FALSE);
- }
+ if (cmd == 8) {
+ n = klogctl( cmd, NULL, level );
+ if (n < 0) {
+ goto klogctl_error;
+ }
+ exit( TRUE );
+ }
- 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');
- exit (TRUE);
+ if (bufsize < 4096) bufsize = 4096;
+ buf = (char*)malloc(bufsize);
+ n = klogctl( cmd, buf, bufsize );
+ if (n < 0) {
+ goto klogctl_error;
+ }
- end:
+ 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' );
+ exit( TRUE);
+end:
usage( dmesg_usage);
exit (FALSE);
+klogctl_error:
+ perror( "klogctl" );
+ exit( FALSE );
+
}