2 .\" Copyright (c) 2001 Andrew R. Reiter
3 .\" Copyright (c) 2004 Joerg Wunsch
4 .\" All rights reserved.
6 .\" Redistribution and use in source and binary forms, with or without
7 .\" modification, are permitted provided that the following conditions
9 .\" 1. Redistributions of source code must retain the above copyright
10 .\" notice, this list of conditions and the following disclaimer.
11 .\" 2. Redistributions in binary form must reproduce the above copyright
12 .\" notice, this list of conditions and the following disclaimer in the
13 .\" documentation and/or other materials provided with the distribution.
15 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 .\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 .\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 .\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
20 .\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 .\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
22 .\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 .\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 .\" $FreeBSD: src/share/man/man9/printf.9,v 1.8 2006/09/08 14:05:03 ru Exp $
28 .\" $DragonFly: src/share/man/man9/kprintf.9,v 1.1 2007/01/02 00:16:56 swildner Exp $
43 .Nd formatted output conversion
48 .Fn kprintf "const char *format" ...
50 .Fn ksprintf "char *str" "const char *format" ...
52 .Fn ksnprintf "char *str" "size_t size" "const char *format" ...
54 .Fn kvprintf "const char *format" "__va_list ap"
56 .Fn kvsprintf "char *str" "const char *format" "__va_list ap"
58 .Fn kvsnprintf "char *str" "size_t size" "const char *format" "__va_list ap"
60 .Fn tprintf "struct proc *p" "int pri" "const char *format" ...
62 .Fn uprintf "const char *format" ...
65 .Fn log "int pri" "const char *format" ...
69 family of functions are similar to the
72 The different functions each use a different output stream.
75 function outputs to the current process' controlling tty, while
83 write to the console as well as to the logging facility.
86 function outputs to the tty associated with the process
88 and the logging facility if
93 function sends the message to the kernel logging facility, using
94 the log level as indicated by
97 Each of these related functions use the
103 parameters in the same manner as
107 functions add two other conversion specifiers to
112 identifier expects two arguments: an
116 These are used as a register value and a print mask for decoding bitmasks.
117 The print mask is made up of two parts: the base and the
119 The base value is the output base expressed as an integer value;
120 for example, \e10 gives octal and \e20 gives hexadecimal.
121 The arguments are made up of a sequence of bit identifiers.
122 Each bit identifier begins with an integer value which is the number of the
123 bit (starting from 1) this identifier describes.
124 The rest of the identifier is a string of characters containing the name of
126 The string is terminated by either the bit number at the start of the next
129 for the last bit identifier.
133 identifier is meant to assist in hexdumps.
134 It requires two arguments: a
139 The memory pointed to be the pointer is output in hexadecimal one byte at
141 The string is used as a delimiter between individual bytes.
142 If present, a width directive will specify the number of bytes to display.
143 By default, 16 bytes of data are output.
155 parameter (mistakenly called
160 of \-1 is given, the message will be appended to the last log message
161 started by a previous call to
163 As these messages are generated by the kernel itself, the facility will
177 functions return the number of characters displayed.
179 This example demonstrates the use of the
183 conversion specifiers.
185 .Bd -literal -offset indent
190 kprintf("reg=%b\en", 3, "\e10\e2BITTWO\e1BITONE\en");
191 kprintf("out: %4D\en", "AAAA", ":");
195 will produce the following output:
196 .Bd -literal -offset indent
202 .Bd -literal -offset indent
203 log(LOG_DEBUG, "%s%d: been there.\en", sc->sc_name, sc->sc_unit);
206 will add the appropriate debug message at priority