diff options
Diffstat (limited to 'sbin/dmesg/dmesg.c')
| -rw-r--r-- | sbin/dmesg/dmesg.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/sbin/dmesg/dmesg.c b/sbin/dmesg/dmesg.c index 002732cc479c..f0fcb8125877 100644 --- a/sbin/dmesg/dmesg.c +++ b/sbin/dmesg/dmesg.c @@ -54,6 +54,7 @@ __FBSDID("$FreeBSD$"); #include <locale.h> #include <nlist.h> #include <stdio.h> +#include <stdbool.h> #include <stdlib.h> #include <string.h> #include <unistd.h> @@ -79,15 +80,20 @@ main(int argc, char *argv[]) kvm_t *kd; size_t buflen, bufpos; long pri; - int all, ch; + int ch, clear; + bool all; - all = 0; + all = false; + clear = false; (void) setlocale(LC_CTYPE, ""); memf = nlistf = NULL; - while ((ch = getopt(argc, argv, "aM:N:")) != -1) + while ((ch = getopt(argc, argv, "acM:N:")) != -1) switch(ch) { case 'a': - all++; + all = true; + break; + case 'c': + clear = true; break; case 'M': memf = optarg; @@ -114,6 +120,9 @@ main(int argc, char *argv[]) errx(1, "malloc failed"); if (sysctlbyname("kern.msgbuf", bp, &buflen, NULL, 0) == -1) err(1, "sysctl kern.msgbuf"); + if (clear) + if (sysctlbyname("kern.msgbuf_clear", NULL, NULL, &clear, sizeof(int))) + err(1, "sysctl kern.msgbuf_clear"); } else { /* Read in kernel message buffer and do sanity checks. */ kd = kvm_open(nlistf, memf, NULL, O_RDONLY, "dmesg"); @@ -196,6 +205,6 @@ main(int argc, char *argv[]) void usage(void) { - (void)fprintf(stderr, "usage: dmesg [-a] [-M core [-N system]]\n"); + fprintf(stderr, "usage: dmesg [-ac] [-M core [-N system]]\n"); exit(1); } |