There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
148 lines
4.1 KiB
Groff
148 lines
4.1 KiB
Groff
.\" $NetBSD: getsubopt.3,v 1.14 2009/11/17 15:02:08 wiz Exp $
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.\"
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.\" Copyright (c) 1990, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)getsubopt.3 8.1 (Berkeley) 6/9/93
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.\"
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.Dd November 17, 2009
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.Dt GETSUBOPT 3
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.Os
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.Sh NAME
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.Nm getsubopt
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.Nd get sub options from an argument
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In unistd.h
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.Vt extern char *suboptarg
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.Ft int
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.Fn getsubopt "char **optionp" "char * const *tokens" "char **valuep"
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.Sh DESCRIPTION
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The
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.Fn getsubopt
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function
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parses a string containing tokens delimited by one or more tab, space or
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comma
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.Pq Ql \&,
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characters.
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It is intended for use in parsing groups of option arguments provided
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as part of a utility command line.
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.Pp
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The argument
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.Fa optionp
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is a pointer to a pointer to the string.
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The argument
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.Fa tokens
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is a pointer to a
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.Dv NULL Ns -terminated
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array of pointers to strings.
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.Pp
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The
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.Fn getsubopt
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function
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returns the zero-based offset of the pointer in the
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.Fa tokens
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array referencing a string which matches the first token
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in the string, or \-1 if the string contains no tokens or
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.Fa tokens
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does not contain a matching string.
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.Pp
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If the token is of the form ``name=value'', the location referenced by
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.Fa valuep
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will be set to point to the start of the ``value'' portion of the token.
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.Pp
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On return from
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.Fn getsubopt ,
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.Fa optionp
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will be set to point to the start of the next token in the string,
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or the null at the end of the string if no more tokens are present.
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The external variable
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.Fa suboptarg
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will be set to point to the start of the current token, or
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.Dv NULL
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if no
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tokens were present.
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The argument
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.Fa valuep
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will be set to point to the ``value'' portion of the token, or
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.Dv NULL
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if no ``value'' portion was present.
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.Sh EXAMPLES
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.Bd -literal -compact
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char *tokens[] = {
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#define ONE 0
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"one",
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#define TWO 1
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"two",
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NULL
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};
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\&...
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extern char *optarg, *suboptarg;
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char *options, *value;
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while ((ch = getopt(argc, argv, "ab:")) != \-1) {
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switch(ch) {
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case 'a':
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/* process ``a'' option */
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break;
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case 'b':
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options = optarg;
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while (*options) {
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switch(getsubopt(\*[Am]options, tokens, \*[Am]value)) {
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case ONE:
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/* process ``one'' sub option */
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break;
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case TWO:
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/* process ``two'' sub option */
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if (!value)
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error("no value for two");
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i = atoi(value);
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break;
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case \-1:
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if (suboptarg)
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error("unknown sub option %s",
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suboptarg);
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else
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error("missing sub option");
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break;
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}
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break;
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}
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.Ed
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.Sh SEE ALSO
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.Xr getopt 3 ,
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.Xr strsep 3
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.Sh HISTORY
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The
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.Fn getsubopt
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function first appeared in
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.Bx 4.4 ,
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and is included in
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.St -p1003.1-2008 .
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