1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
/*
* Linux kernel print routine.
* Copyright (C) 1995 Shantanu Goel.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* linux/kernel/printk.c
*
* Copyright (C) 1991, 1992 Linus Torvalds
*/
#define MACH_INCLUDE
#include <stdarg.h>
#include <asm/system.h>
#include <kern/assert.h>
#include <kern/printf.h>
#include <device/cons.h>
static char buf[2048];
#define DEFAULT_MESSAGE_LOGLEVEL 4
#define DEFAULT_CONSOLE_LOGLEVEL 7
int console_loglevel = DEFAULT_CONSOLE_LOGLEVEL;
int
printk (char *fmt, ...)
{
va_list args;
int n, flags;
char *p, *msg, *buf_end;
static int msg_level = -1;
save_flags (flags);
cli ();
va_start (args, fmt);
n = vsnprintf (buf + 3, sizeof (buf) - 3, fmt, args);
assert (n <= sizeof (buf) - 3);
buf_end = buf + 3 + n;
va_end (args);
for (p = buf + 3; p < buf_end; p++)
{
msg = p;
if (msg_level < 0)
{
if (p[0] != '<' || p[1] < '0' || p[1] > '7' || p[2] != '>')
{
p -= 3;
p[0] = '<';
p[1] = DEFAULT_MESSAGE_LOGLEVEL + '0';
p[2] = '>';
}
else
msg += 3;
msg_level = p[1] - '0';
}
for (; p < buf_end; p++)
if (*p == '\n')
break;
if (msg_level < console_loglevel)
while (msg <= p)
cnputc (*msg++);
if (*p == '\n')
msg_level = -1;
}
restore_flags (flags);
return n;
}
|
