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Annotation of Gnu-Mach/linux/dev/kernel/printk.c, revision 1.1.1.2

1.1       root        1: /*
                      2:  * Linux kernel print routine.
                      3:  * Copyright (C) 1995 Shantanu Goel.
                      4:  *
                      5:  * This program is free software; you can redistribute it and/or modify
                      6:  * it under the terms of the GNU General Public License as published by
                      7:  * the Free Software Foundation; either version 2, or (at your option)
                      8:  * any later version.
                      9:  *
                     10:  * This program is distributed in the hope that it will be useful,
                     11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
                     12:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     13:  * GNU General Public License for more details.
                     14:  *
                     15:  * You should have received a copy of the GNU General Public License
                     16:  * along with this program; if not, write to the Free Software
                     17:  * Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
                     18:  */
                     19: 
                     20: /*
                     21:  *  linux/kernel/printk.c
                     22:  *
                     23:  *  Copyright (C) 1991, 1992  Linus Torvalds
                     24:  */
                     25: 
                     26: #define MACH_INCLUDE
                     27: #include <stdarg.h>
                     28: #include <asm/system.h>
1.1.1.2 ! root       29: #include <kern/assert.h>
        !            30: #include <kern/printf.h>
        !            31: #include <device/cons.h>
1.1       root       32: 
                     33: static char buf[2048];
                     34: 
                     35: #define DEFAULT_MESSAGE_LOGLEVEL 4
                     36: #define DEFAULT_CONSOLE_LOGLEVEL 7
                     37: 
                     38: int console_loglevel = DEFAULT_CONSOLE_LOGLEVEL;
                     39: 
                     40: int
                     41: printk (char *fmt, ...)
                     42: {
                     43:   va_list args;
1.1.1.2 ! root       44:   int n;
        !            45:   unsigned long flags;
1.1       root       46:   char *p, *msg, *buf_end;
                     47:   static int msg_level = -1;
                     48:   
                     49:   save_flags (flags);
                     50:   cli ();
                     51:   va_start (args, fmt);
1.1.1.2 ! root       52:   n = vsnprintf (buf + 3, sizeof (buf) - 3, fmt, args);
        !            53:   assert (n <= sizeof (buf) - 3);
1.1       root       54:   buf_end = buf + 3 + n;
                     55:   va_end (args);
                     56:   for (p = buf + 3; p < buf_end; p++)
                     57:     {
                     58:       msg = p;
                     59:       if (msg_level < 0)
                     60:        {
                     61:          if (p[0] != '<' || p[1] < '0' || p[1] > '7' || p[2] != '>')
                     62:            {
                     63:              p -= 3;
                     64:              p[0] = '<';
                     65:              p[1] = DEFAULT_MESSAGE_LOGLEVEL + '0';
                     66:              p[2] = '>';
                     67:            }
                     68:          else
                     69:            msg += 3;
                     70:          msg_level = p[1] - '0';
                     71:        }
                     72:       for (; p < buf_end; p++)
                     73:        if (*p == '\n')
                     74:          break;
                     75:       if (msg_level < console_loglevel)
                     76:          while (msg <= p)
                     77:            cnputc (*msg++);
                     78:       if (*p == '\n')
                     79:        msg_level = -1;
                     80:     }
                     81:   restore_flags (flags);
                     82:   return n;
                     83: }

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