Last change
on this file since 3567 was 3320, checked in by Bruno Cornec, 10 years ago |
- Re-add (thanks git BTW) the 2.2.9 branch which had been destroyed in
the move to 3.0
|
-
Property svn:eol-style
set to
native
|
File size:
1.6 KB
|
Rev | Line | |
---|
[3320] | 1 | /* vi: set sw=4 ts=4: */
|
---|
| 2 | /*
|
---|
| 3 | *
|
---|
| 4 | * dmesg - display/control kernel ring buffer.
|
---|
| 5 | *
|
---|
| 6 | * Copyright 2006 Rob Landley <rob@landley.net>
|
---|
| 7 | * Copyright 2006 Bernhard Reutner-Fischer <rep.nop@aon.at>
|
---|
| 8 | *
|
---|
| 9 | * Licensed under GPLv2, see file LICENSE in this source tree.
|
---|
| 10 | */
|
---|
| 11 | #include <sys/klog.h>
|
---|
| 12 | #include "libbb.h"
|
---|
| 13 |
|
---|
| 14 | int dmesg_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 15 | int dmesg_main(int argc UNUSED_PARAM, char **argv)
|
---|
| 16 | {
|
---|
| 17 | int len, level;
|
---|
| 18 | char *buf;
|
---|
| 19 | unsigned opts;
|
---|
| 20 | enum {
|
---|
| 21 | OPT_c = 1 << 0,
|
---|
| 22 | OPT_s = 1 << 1,
|
---|
| 23 | OPT_n = 1 << 2
|
---|
| 24 | };
|
---|
| 25 |
|
---|
| 26 | opt_complementary = "s+:n+"; /* numeric */
|
---|
| 27 | opts = getopt32(argv, "cs:n:", &len, &level);
|
---|
| 28 | if (opts & OPT_n) {
|
---|
| 29 | if (klogctl(8, NULL, (long) level))
|
---|
| 30 | bb_perror_msg_and_die("klogctl");
|
---|
| 31 | return EXIT_SUCCESS;
|
---|
| 32 | }
|
---|
| 33 |
|
---|
| 34 | if (!(opts & OPT_s))
|
---|
| 35 | len = klogctl(10, NULL, 0); /* read ring buffer size */
|
---|
| 36 | if (len < 16*1024)
|
---|
| 37 | len = 16*1024;
|
---|
| 38 | if (len > 16*1024*1024)
|
---|
| 39 | len = 16*1024*1024;
|
---|
| 40 |
|
---|
| 41 | buf = xmalloc(len);
|
---|
| 42 | len = klogctl(3 + (opts & OPT_c), buf, len); /* read ring buffer */
|
---|
| 43 | if (len < 0)
|
---|
| 44 | bb_perror_msg_and_die("klogctl");
|
---|
| 45 | if (len == 0)
|
---|
| 46 | return EXIT_SUCCESS;
|
---|
| 47 |
|
---|
| 48 |
|
---|
| 49 | if (ENABLE_FEATURE_DMESG_PRETTY) {
|
---|
| 50 | int last = '\n';
|
---|
| 51 | int in = 0;
|
---|
| 52 |
|
---|
| 53 | /* Skip <#> at the start of lines */
|
---|
| 54 | while (1) {
|
---|
| 55 | if (last == '\n' && buf[in] == '<') {
|
---|
| 56 | in += 3;
|
---|
| 57 | if (in >= len)
|
---|
| 58 | break;
|
---|
| 59 | }
|
---|
| 60 | last = buf[in];
|
---|
| 61 | putchar(last);
|
---|
| 62 | in++;
|
---|
| 63 | if (in >= len)
|
---|
| 64 | break;
|
---|
| 65 | }
|
---|
| 66 | /* Make sure we end with a newline */
|
---|
| 67 | if (last != '\n')
|
---|
| 68 | bb_putchar('\n');
|
---|
| 69 | } else {
|
---|
| 70 | full_write(STDOUT_FILENO, buf, len);
|
---|
| 71 | if (buf[len-1] != '\n')
|
---|
| 72 | bb_putchar('\n');
|
---|
| 73 | }
|
---|
| 74 |
|
---|
| 75 | if (ENABLE_FEATURE_CLEAN_UP) free(buf);
|
---|
| 76 |
|
---|
| 77 | return EXIT_SUCCESS;
|
---|
| 78 | }
|
---|
Note:
See
TracBrowser
for help on using the repository browser.