diff options
author | Eric Andersen <andersen@codepoet.org> | 1999-10-05 20:24:54 +0400 |
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committer | Eric Andersen <andersen@codepoet.org> | 1999-10-05 20:24:54 +0400 |
commit | cc8ed39b240180b58810784f844e253263594ac3 (patch) | |
tree | 15feebbb4be9a9168209609f48f0b100f9364420 /dmesg.c |
Initial revision0_29alpha2
Diffstat (limited to 'dmesg.c')
-rw-r--r-- | dmesg.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/dmesg.c b/dmesg.c new file mode 100644 index 000000000..a63fa3d39 --- /dev/null +++ b/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; +} |