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root/usr/bin/dmesg/dmesg.c

DEFINITIONS

1. main

   1 /*-
   2  * Copyright (c) 2007, Kohsuke Ohtani
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the author nor the names of any co-contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  30 #include <sys/prex.h>
  32 #include <unistd.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  36 #ifdef CMDBOX
  37 #define main(argc, argv)        dmesg_main(argc, argv)
  38 #endif
  40 int
main(int argc, char *argv[])
  42 {
size_t size;
  44         char *buf;
  45         int i;
  47         if (sys_debug(DBGC_LOGSIZE, &size) != 0) {
fprintf(stderr, "dmesg: not supported\n");
exit(1);
  50         }
  51         if (size == 0)
exit(1);
  53         if ((buf = malloc(size)) == NULL)
exit(1);
  56         if (sys_debug(DBGC_GETLOG, buf) != 0) {
free(buf);
exit(1);
  59         }
  60         for (i = 0; i < (int)size; i++) {
  61                 if (*buf == '\0')
  62                         break;
putc(*buf, stdout);
buf++;
  65         }
free(buf);
  67         return 0;
  68 }