02e7608416
uses printf for simplicity). This script runs using the build host's shell, and echo, and so must deal with all of the absurdity that different versions of echo dumb upon us. This is the underlying cause of the linux build failure that gson@ reported.
225 lines
5.5 KiB
Bash
Executable File
225 lines
5.5 KiB
Bash
Executable File
#! /bin/sh
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# $NetBSD: mkinit.sh,v 1.10 2018/12/05 09:20:18 kre Exp $
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# Copyright (c) 2003 The NetBSD Foundation, Inc.
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# All rights reserved.
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#
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# This code is derived from software contributed to The NetBSD Foundation
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# by David Laight.
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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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#
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# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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srcs="$*"
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# use of echo in this script is broken
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# some echo versions will expand \n in the args, which breaks C
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# Note: this script is a HOST_PROG ... it must run in the
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# build host's environment, with its shell.
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# Fortunately, use of echo here is also trivially simplistic,
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# we can easily replace all uses with ...
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echo()
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{
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printf '%s\n' "$1"
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}
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# CAUTION: for anyone modifying this script.... use printf
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# rather than echo to output anything at all... then
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# you will avoid being bitten by the simplicity of this function.
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# This was done this way rather than wholesale replacement
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# to avoid unnecessary code churn.
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nl='
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'
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openparen='('
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# shells have bugs (including older NetBSD sh) in how \ is
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# used in pattern matching. So work out what the shell
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# running this script expects. We could also just use a
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# literal \ in the pattern, which would need to be quoted
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# of course, but then we'd run into a whole host of potential
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# other shell bugs (both with the quoting in the pattern, and
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# with the matching that follows if that works as inended).
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# Far easier, and more reliable, is to just work out what works,
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# and then use it, which more or less mandates using a variable...
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backslash='\\'
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var='abc\' # dummy test case.
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if [ "$var" = "${var%$backslash}" ]
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then
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# buggy sh, try the broken way
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backslash='\'
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if [ "$var" = "${var%$backslash}" ]
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then
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printf >&2 "$0: %s\n" 'No pattern match with \ (broken shell)'
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exit 1
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fi
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fi
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# We know we can detect the presence of a trailing \, which is all we need.
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# Now to confirm we will not generate false matches.
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var='abc'
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if [ "$var" != "${var%$backslash}" ]
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then
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printf >&2 "$0: %s\n" 'Bogus pattern match with \ (broken shell)'
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exit 1
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fi
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unset var
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includes=' "shell.h" "mystring.h" "init.h" '
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defines=
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decles=
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event_init=
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event_reset=
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event_shellproc=
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for src in $srcs; do
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exec <$src
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decnl="$nl"
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while IFS=; read -r line; do
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[ "$line" = x ]
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case "$line " in
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INIT["{ "]* ) event=init;;
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RESET["{ "]* ) event=reset;;
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SHELLPROC["{ "]* ) event=shellproc;;
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INCLUDE[\ \ ]* )
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IFS=' '
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set -- $line
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# ignore duplicates
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[ "${includes}" != "${includes% $2 *}" ] && continue
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includes="$includes$2 "
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continue
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;;
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MKINIT\ )
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# struct declaration
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decles="$decles$nl"
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while
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read -r line
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decles="${decles}${line}${nl}"
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[ "$line" != "};" ]
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do
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:
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done
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decnl="$nl"
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continue
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;;
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MKINIT["{ "]* )
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# strip initialiser
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def=${line#MKINIT}
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comment="${def#*;}"
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def="${def%;$comment}"
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def="${def%%=*}"
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def="${def% }"
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decles="${decles}${decnl}extern${def};${comment}${nl}"
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decnl=
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continue
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;;
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\#define[\ \ ]* )
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IFS=' '
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set -- $line
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# Ignore those with arguments
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[ "$2" = "${2##*$openparen}" ] || continue
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# and multiline definitions
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[ "$line" = "${line%$backslash}" ] || continue
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defines="${defines}#undef $2${nl}${line}${nl}"
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continue
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;;
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* ) continue;;
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esac
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# code for events
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ev="${nl} /* from $src: */${nl} {${nl}"
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# Indent the text by an extra <tab>
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while
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read -r line
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[ "$line" != "}" ]
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do
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case "$line" in
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('') ;;
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('#'*) ;;
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(*) line=" $line";;
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esac
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ev="${ev}${line}${nl}"
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done
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ev="${ev} }${nl}"
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eval event_$event=\"\$event_$event\$ev\"
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done
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done
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exec >init.c.tmp
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echo "/*"
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echo " * This file was generated by the mkinit program."
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echo " */"
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echo
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IFS=' '
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for f in $includes; do
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echo "#include $f"
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done
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echo
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echo
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echo
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echo "$defines"
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echo
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echo "$decles"
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echo
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echo
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echo "/*"
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echo " * Initialization code."
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echo " */"
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echo
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echo "void"
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echo "init(void)"
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echo "{"
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echo "${event_init}"
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echo "}"
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echo
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echo
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echo
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echo "/*"
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echo " * This routine is called when an error or an interrupt occurs in an"
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echo " * interactive shell and control is returned to the main command loop."
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echo " */"
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echo
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echo "void"
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echo "reset(void)"
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echo "{"
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echo "${event_reset}"
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echo "}"
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echo
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echo
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echo
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echo "/*"
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echo " * This routine is called to initialize the shell to run a shell procedure."
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echo " */"
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echo
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echo "void"
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echo "initshellproc(void)"
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echo "{"
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echo "${event_shellproc}"
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echo "}"
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exec >&-
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mv init.c.tmp init.c
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