/* 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 <sys/klog.h> #include "libbb.h" int dmesg_main(int argc, char **argv); 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; }