-#include "internal.h"
-#include <stdlib.h>
-#include <unistd.h>
-#include <time.h>
-
+/* vi: set sw=4 ts=4: */
/* 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 <linux/unistd.h>
+#include "busybox.h"
#include <stdio.h>
+#include <stdlib.h>
+#include <getopt.h>
-#define __NR_klog __NR_syslog
+#if __GNU_LIBRARY__ < 5
+#include <sys/syscall.h>
+#include <linux/unistd.h>
+#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
-
-static const char dmesg_usage[] = "dmesg [-c] [-n level]\n";
-
-int dmesg_main (int argc, char **argv)
+int dmesg_main(int argc, char **argv)
{
+ char *buf;
+ int c;
+ int bufsize = 8196;
+ int i;
+ int n;
+ int level = 0;
+ int lastc;
+ int cmd = 3;
- char buf[4096];
- int i;
- int n;
- int level = 0;
- int lastc;
- int cmd = 3;
-
- argc--;
- argv++;
+ while ((c = getopt(argc, argv, "cn:s:")) != EOF) {
+ switch (c) {
+ case 'c':
+ cmd = 4;
+ break;
+ case 'n':
+ cmd = 8;
+ if (optarg == NULL)
+ show_usage();
+ level = atoi(optarg);
+ break;
+ case 's':
+ if (optarg == NULL)
+ show_usage();
+ bufsize = atoi(optarg);
+ break;
+ default:
+ show_usage();
+ }
+ }
- /* Parse any options */
- while (argc && **argv == '-') {
- while (*++(*argv))
- switch (**argv) {
- case 'c':
- cmd = 4;
- break;
- case 'n':
- cmd = 8;
- if (--argc == 0)
- goto end;
- level = atoi (*(++argv));
- --argc;
- ++argv;
- break;
- default:
- goto end;
- }
- }
+ if (optind < argc) {
+ show_usage();
+ }
- if (cmd == 8) {
- n = klog (cmd, NULL, level);
- if (n < 0) {
- perror ("klog");
- exit (FALSE);
+ if (cmd == 8) {
+ if (klogctl(cmd, NULL, level) < 0)
+ perror_msg_and_die("klogctl");
+ return EXIT_SUCCESS;
}
- exit (TRUE);
- }
- n = klog (cmd, buf, sizeof (buf));
- if (n < 0) {
- perror ("klog");
- exit (FALSE);
- }
+ if (bufsize < 4096)
+ bufsize = 4096;
+ buf = (char *) xmalloc(bufsize);
+ if ((n = klogctl(cmd, buf, bufsize)) < 0)
+ perror_msg_and_die("klogctl");
- 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 = '\n';
+ for (i = 0; i < n; i++) {
+ if (lastc == '\n' && buf[i] == '<') {
+ i++;
+ while (buf[i] >= '0' && buf[i] <= '9')
+ i++;
+ if (buf[i] == '>')
+ i++;
+ }
+ lastc = buf[i];
+ putchar(lastc);
}
- lastc = buf[i];
- putchar (lastc);
- }
- if (lastc != '\n')
- putchar ('\n');
- exit (TRUE);
-
- end:
- fprintf (stderr, "Usage: %s\n", dmesg_usage);
- exit (FALSE);
+ if (lastc != '\n')
+ putchar('\n');
+ return EXIT_SUCCESS;
}