Last change
on this file since 3537 was 2725, checked in by Bruno Cornec, 14 years ago |
- Update mindi-busybox to 1.18.3 to avoid problems with the tar command which is now failing on recent versions with busybox 1.7.3
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File size:
1.6 KB
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1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | *
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4 | * dmesg - display/control kernel ring buffer.
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5 | *
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6 | * Copyright 2006 Rob Landley <rob@landley.net>
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7 | * Copyright 2006 Bernhard Reutner-Fischer <rep.nop@aon.at>
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8 | *
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9 | * Licensed under GPLv2, see file LICENSE in this source tree.
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10 | */
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11 | #include <sys/klog.h>
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12 | #include "libbb.h"
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13 |
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14 | int dmesg_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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15 | int dmesg_main(int argc UNUSED_PARAM, char **argv)
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16 | {
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17 | int len, level;
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18 | char *buf;
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19 | unsigned opts;
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20 | enum {
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21 | OPT_c = 1 << 0,
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22 | OPT_s = 1 << 1,
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23 | OPT_n = 1 << 2
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24 | };
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25 |
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26 | opt_complementary = "s+:n+"; /* numeric */
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27 | opts = getopt32(argv, "cs:n:", &len, &level);
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28 | if (opts & OPT_n) {
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29 | if (klogctl(8, NULL, (long) level))
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30 | bb_perror_msg_and_die("klogctl");
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31 | return EXIT_SUCCESS;
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32 | }
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33 |
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34 | if (!(opts & OPT_s))
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35 | len = klogctl(10, NULL, 0); /* read ring buffer size */
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36 | if (len < 16*1024)
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37 | len = 16*1024;
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38 | if (len > 16*1024*1024)
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39 | len = 16*1024*1024;
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40 |
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41 | buf = xmalloc(len);
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42 | len = klogctl(3 + (opts & OPT_c), buf, len); /* read ring buffer */
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43 | if (len < 0)
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44 | bb_perror_msg_and_die("klogctl");
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45 | if (len == 0)
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46 | return EXIT_SUCCESS;
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47 |
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48 |
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49 | if (ENABLE_FEATURE_DMESG_PRETTY) {
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50 | int last = '\n';
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51 | int in = 0;
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52 |
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53 | /* Skip <#> at the start of lines */
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54 | while (1) {
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55 | if (last == '\n' && buf[in] == '<') {
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56 | in += 3;
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57 | if (in >= len)
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58 | break;
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59 | }
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60 | last = buf[in];
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61 | putchar(last);
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62 | in++;
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63 | if (in >= len)
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64 | break;
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65 | }
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66 | /* Make sure we end with a newline */
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67 | if (last != '\n')
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68 | bb_putchar('\n');
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69 | } else {
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70 | full_write(STDOUT_FILENO, buf, len);
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71 | if (buf[len-1] != '\n')
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72 | bb_putchar('\n');
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73 | }
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74 |
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75 | if (ENABLE_FEATURE_CLEAN_UP) free(buf);
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76 |
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77 | return EXIT_SUCCESS;
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78 | }
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