385 lines
9.6 KiB
Bash
Executable file
385 lines
9.6 KiB
Bash
Executable file
#!/bin/sh -
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copyright='
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/*
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* Copyright (c) 2000-2019 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* The contents of this file constitute Original Code as defined in and
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* are subject to the Apple Public Source License Version 1.1 (the
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* "License"). You may not use this file except in compliance with the
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* License. Please obtain a copy of the License at
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* http://www.apple.com/publicsource and read it before using this file.
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*
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* This Original Code and all software distributed under the License are
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* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
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* License for the specific language governing rights and limitations
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* under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved
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* Copyright (c) 1992, 1993, 1994, 1995
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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'
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SCRIPT_ID='@(#)vnode_if.sh 8.7 (Berkeley) 5/11/95'
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# Script to produce VFS front-end sugar.
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#
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# usage: vnode_if.sh srcfile
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# (where srcfile is currently bsd/vfs/vnode_if.src)
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#
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if [ $# -ne 1 ] ; then
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echo 'usage: vnode_if.sh srcfile'
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exit 1
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fi
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# Name of the source file.
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src=$1
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# Names of the created files.
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out_c=vnode_if.c
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out_h=vnode_if.h
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# Awk program (must support nawk extensions)
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# Use "awk" at Berkeley, "nawk" or "gawk" elsewhere.
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awk=${AWK:-awk}
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#awk=${AWK:-gawk}
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# Does this awk have a "toupper" function? (i.e. is it GNU awk)
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isgawk=`$awk 'BEGIN { print toupper("true"); exit; }' 2>/dev/null`
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# If this awk does not define "toupper" then define our own.
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if [ "$isgawk" = TRUE ] ; then
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# GNU awk provides it.
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toupper=
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else
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# Provide our own toupper()
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toupper='
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function toupper(str) {
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_toupper_cmd = "echo "str" |tr a-z A-Z"
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_toupper_cmd | getline _toupper_str;
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close(_toupper_cmd);
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return _toupper_str;
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}'
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fi
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#
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# This is the common part of all awk programs that read $src
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# This parses the input for one function into the arrays:
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# argdir, argtype, argname, willrele
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# and calls "doit()" to generate output for the function.
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#
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# Input to this parser is pre-processed slightly by sed
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# so this awk parser doesn't have to work so hard. The
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# changes done by the sed pre-processing step are:
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# insert a space beween * and pointer name
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# replace semicolons with spaces
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#
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sed_prep='s:\*\([^\*/]\):\* \1:g
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s/;/ /'
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awk_parser='
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# Comment line
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/^#/ { next; }
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# First line of description
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/^vop_/ {
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name=$1;
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argc=0;
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ubc=$3;
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next;
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}
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# Last line of description
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/^}/ {
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doit();
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next;
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}
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# Middle lines of description
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{
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argdir[argc] = $1; i=2;
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if ($2 == "WILLRELE") {
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willrele[argc] = 1;
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i++;
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} else
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willrele[argc] = 0;
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argtype[argc] = $i; i++;
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while (i < NF) {
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argtype[argc] = argtype[argc]" "$i;
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i++;
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}
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argname[argc] = $i;
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argc++;
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next;
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}
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'
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# This is put after the copyright on each generated file.
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warning="
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/*
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* Warning: This file is generated automatically.
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* (Modifications made here may easily be lost!)
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*
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* Created by the script:
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* ${SCRIPT_ID}
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*/
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"
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# Get rid of ugly spaces
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space_elim='s:\([^/]\*\) :\1:g'
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#
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# Redirect stdout to the H file.
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#
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echo "$0: Creating $out_h" 1>&2
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exec > $out_h
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# Begin stuff
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echo "$copyright"
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echo "$warning"
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echo '
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#ifndef _SYS_VNODE_IF_H_
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#define _SYS_VNODE_IF_H_
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#include <sys/appleapiopts.h>
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#include <sys/ubc.h>
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#ifdef __APPLE_API_UNSTABLE
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extern struct vnodeop_desc vop_default_desc;
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'
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# Body stuff
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# This awk program needs toupper() so define it if necessary.
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sed -e "$sed_prep" $src | $awk "$toupper"'
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function doit() {
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# Declare arg struct, descriptor.
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printf("\nstruct %s_args {\n", name);
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printf("\tstruct vnodeop_desc * a_desc;\n");
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for (i=0; i<argc; i++) {
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printf("\t%s a_%s;\n", argtype[i], argname[i]);
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}
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printf("};\n");
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printf("extern struct vnodeop_desc %s_desc;\n", name);
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# Define inline function.
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printf("#define %s(", toupper(name));
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for (i=0; i<argc; i++) {
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printf("%s", argname[i]);
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if (i < (argc-1)) printf(", ");
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}
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printf(") _%s(", toupper(name));
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for (i=0; i<argc; i++) {
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printf("%s", argname[i]);
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if (i < (argc-1)) printf(", ");
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}
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printf(")\n");
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printf("static __inline int _%s(", toupper(name));
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for (i=0; i<argc; i++) {
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# generate ANSI protoypes now, hurrah!
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printf("%s _%s", argtype[i], argname[i]);
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if (i < (argc-1)) printf(", ");
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}
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printf(")\n");
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printf("{\n\tstruct %s_args a;\n", name);
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printf("\ta.a_desc = VDESC(%s);\n", name);
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for (i=0; i<argc; i++) {
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printf("\ta.a_%s = _%s;\n", argname[i], argname[i]);
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}
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if (toupper(ubc) == "UBC") {
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printf("\t{\n\t\t" \
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"int _err;\n\t\t" \
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"_err = VCALL(_%s%s, VOFFSET(%s), &a);\n\t\t" \
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"return (_err);\n\t}\n}\n",
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argname[0], argname[0], arg0special, name, argname[0]);
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} else {
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printf("\treturn (VCALL(_%s%s, VOFFSET(%s), &a));\n}\n",
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argname[0], arg0special, name);
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}
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}
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BEGIN {
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arg0special="";
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}
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END {
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printf("\n/* Special cases: */\n#include <sys/buf.h>\n#include <sys/vm.h>\n");
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argc=1;
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argtype[0]="struct buf *";
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argname[0]="bp";
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arg0special="->b_vp";
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name="vop_strategy";
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doit();
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name="VNOP_BWRITE";
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doit();
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}
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'"$awk_parser" | sed -e "$space_elim"
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# End stuff
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echo '
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/* End of special cases. */
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#endif /* __APPLE_API_UNSTABLE */
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#endif /* !_SYS_VNODE_IF_H_ */'
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#
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# Redirect stdout to the C file.
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#
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echo "$0: Creating $out_c" 1>&2
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exec > $out_c
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# Begin stuff
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echo "$copyright"
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echo "$warning"
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echo '
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/vm.h>
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#include <sys/vnode.h>
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struct vnodeop_desc vop_default_desc = {
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.vdesc_offset = 0,
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.vdesc_name = "default",
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.vdesc_flags = 0,
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.vdesc_vp_offsets = NULL,
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.vdesc_vpp_offset = VDESC_NO_OFFSET,
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.vdesc_cred_offset = VDESC_NO_OFFSET,
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.vdesc_proc_offset = VDESC_NO_OFFSET,
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.vdesc_componentname_offset = VDESC_NO_OFFSET,
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.vdesc_context_offset = VDESC_NO_OFFSET,
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.vdesc_transports = NULL,
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};
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'
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# Body stuff
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sed -e "$sed_prep" $src | $awk '
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function do_offset(typematch) {
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for (i=0; i<argc; i++) {
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if (argtype[i] == typematch) {
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printf("\tVOPARG_OFFSETOF(struct %s_args, a_%s),\n",
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name, argname[i]);
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return i;
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};
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};
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print "\tVDESC_NO_OFFSET,";
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return -1;
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}
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function doit() {
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# Define offsets array
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printf("\nint %s_vp_offsets[] = {\n", name);
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for (i=0; i<argc; i++) {
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if (argtype[i] == "struct vnode *") {
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printf ("\tVOPARG_OFFSETOF(struct %s_args,a_%s),\n",
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name, argname[i]);
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}
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}
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print "\tVDESC_NO_OFFSET";
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print "};";
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# Define F_desc
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printf("struct vnodeop_desc %s_desc = {\n", name);
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# offset
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printf ("\t0,\n");
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# printable name
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printf ("\t\"%s\",\n", name);
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# flags
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printf("\t0");
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vpnum = 0;
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for (i=0; i<argc; i++) {
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if (match(argtype[i], "struct vnode *") == 1) {
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if (willrele[i]) {
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if (argdir[i] ~ /OUT/) {
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printf(" | VDESC_VPP_WILLRELE");
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} else {
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printf(" | VDESC_VP%s_WILLRELE", vpnum);
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};
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}
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vpnum++;
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}
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}
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print ",";
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# vp offsets
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printf ("\t%s_vp_offsets,\n", name);
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# vpp (if any)
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do_offset("struct vnode **");
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# cred (if any)
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do_offset("kauth_credential_t");
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# proc (if any)
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do_offset("struct proc *");
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# componentname
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do_offset("struct componentname *");
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# transport layer information
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printf ("\tNULL,\n};\n");
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}
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END {
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printf("\n/* Special cases: */\n");
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argc=1;
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argdir[0]="IN";
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argtype[0]="struct buf *";
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argname[0]="bp";
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willrele[0]=0;
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name="vop_strategy";
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doit();
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name="VNOP_BWRITE";
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doit();
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}
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'"$awk_parser" | sed -e "$space_elim"
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# End stuff
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echo '
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/* End of special cases. */'
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# Add the vfs_op_descs array to the C file.
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# Begin stuff
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echo '
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struct vnodeop_desc *vfs_op_descs[] = {
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&vop_default_desc, /* MUST BE FIRST */
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&vop_strategy_desc, /* XXX: SPECIAL CASE */
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&VNOP_BWRITE_desc, /* XXX: SPECIAL CASE */
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'
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# Body stuff
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sed -e "$sed_prep" $src | $awk '
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function doit() {
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printf("\t&%s_desc,\n", name);
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}
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'"$awk_parser"
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# End stuff
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echo ' NULL
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};
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'
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exit 0
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# Local Variables:
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# tab-width: 4
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# End:
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