diff options
Diffstat (limited to 'util-linux/dmesg.c')
-rw-r--r-- | util-linux/dmesg.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/util-linux/dmesg.c b/util-linux/dmesg.c new file mode 100644 index 000000000..658cddc38 --- /dev/null +++ b/util-linux/dmesg.c @@ -0,0 +1,53 @@ +/* vi: set sw=4 ts=4: */ +/* + * + * dmesg - display/control kernel ring buffer. + * + * Copyright 2006 Rob Landley <rob@landley.net> + * Copyright 2006 Bernhard Fischer <rep.nop@aon.at> + * + * Licensed under GPLv2, see file LICENSE in this tarball for details. + */ + +#include "busybox.h" +#include <unistd.h> +#include <sys/klog.h> + +int dmesg_main(int argc, char *argv[]) +{ + char *size, *level; + int flags = getopt32(argc, argv, "cs:n:", &size, &level); + + if (flags & 4) { + if (klogctl(8, NULL, xatoul_range(level, 0, 10))) + bb_perror_msg_and_die("klogctl"); + } else { + int len; + char *buf; + + len = (flags & 2) ? xatoul_range(size, 2, INT_MAX) : 16384; + buf = xmalloc(len); + if (0 > (len = klogctl(3 + (flags & 1), buf, len))) + bb_perror_msg_and_die("klogctl"); + + // Skip <#> at the start of lines, and make sure we end with a newline. + + if (ENABLE_FEATURE_DMESG_PRETTY) { + int last = '\n'; + int in; + + for (in = 0; in<len;) { + if (last == '\n' && buf[in] == '<') in += 3; + else putchar(last = buf[in++]); + } + if (last != '\n') putchar('\n'); + } else { + write(1,buf,len); + if (len && buf[len-1]!='\n') putchar('\n'); + } + + if (ENABLE_FEATURE_CLEAN_UP) free(buf); + } + + return 0; +} |