#! /bin/sh -e

# generate a new dcc_conf file from an existing file

# --S-LICENSE--
# $Revision: 1.26 $

FNAME=dcc_conf

#NO_SUID=	#set-UID cdcc, dccproc, and dccsight to DCCUID
#PKG_MAKE=--disable-pkg-make

FORCE=
CUR=
PROTOTYPE=$FNAME
SUFFIX=new
OUT=
DCC_HOMEDIR=/var/dcc

USAGE="$0: [-x] [-F force] [-c cur] [-s out-suffix] [-p prototype] [-o out] [-h homedir]"
while getopts "xF:c:s:p:o:h:" c; do
    case $c in
	x) set -x;;
	F) FORCE="$OPTARG";;
	c) CUR="$OPTARG";;
	s) SUFFIX="$OPTARG";;
	p) PROTOTYPE="$OPTARG";;
	o) OUT="$OPTARG";;
	h) DCC_HOMEDIR="$OPTARG";;
	*) echo "$USAGE" 1>&2; exit 1;;
    esac
done
shift `expr $OPTIND - 1 || true`
if test "$#" -ne 0 -o ! -d "$DCC_HOMEDIR"; then
    echo "$USAGE" 1>&2
    exit 1
fi

if test -z "$CUR"; then
    CUR="$DCC_HOMEDIR/$FNAME"
fi
if test -z "$OUT"; then
    OUT="$CUR-$SUFFIX"
fi

if test ! -s "$PROTOTYPE"; then
    echo "prototype $PROTOTYPE does not exist" 1>&2
    exit 1
fi

if test -n "$FORCE" -o ! -f "$CUR"; then
    cp $PROTOTYPE $CUR$FORCE
    chmod 0644 $CUR$FORCE
    if test -n "dcc" -a -z "$NO_SUID" -a -z "$PKG_MAKE"; then
	set +e		# do not die if the user name is not in the passwd file
	chown dcc $CUR$FORCE
    fi
    exit
fi

# Use /^[ABCDEFGHIJKLMNOPQRSTUVWXYZ]/ patterns instead of easier to read,
# probably faster /^[A-Z/ patterns because someone has decided that
# GNU Awk 3.1.3 (at least on x86_64) should have /^[A-Z]/ match "fi"
# with IGNORECASE=0 and even in traditional mode.

rm -f $OUT
awk '(first_file == "") {
	    first_file = FILENAME;
	}
	/^[ABCDEFGHIJKLMNOPQRSTUVWXYZ]/ {
	    # deal with continuation lines
	    line = $0;
	    while (substr(line,length(line)) == "\\") {
		if (getline <= 0) {
		    break;
		}
		line = line "\n" $0;
	    }
	    # divide the line into the variable name or key and its value
	    inx = index(line, "=");
	    if (inx == 0) {
		inx = length(line)+1;
	    }
	    key = substr(line, 1, inx-1);
	    val = substr(line, inx+1);
	    # only record things in the first file
	    if (first_file == FILENAME) {
		defined[key] = 1;
		mem[key] = val;
		if (cur_comment) {
		    comments[key] = cur_comment;
		    cur_comment = "";
		}
	    } else {
		# on first line of second file, make compatibility adjustments
		if (!adjusted) {
		    adjusted = 1;
		    if (mem["DCCD_ENABLE"] == "") {
			defined["DCCD_ENABLE"] = 1;
			if (mem["SRVR_ID"] == "") {
			    mem["DCCD_ENABLE"] = "off";
			} else {
			    mem["DCCD_ENABLE"] = "on";
			}
		    }
		    # fix DCC_RUNDIR=/var/run/dcc bug in 1.2.14 and preceding
		    if (defined["DCC_RUNDIR"]) {
			if (mem["DCC_RUNDIR"] == "/var/run/dcc") {
			    defined["DCC_RUNDIR"] = 0;
			}
		    }
		    # Use new values of some variables if their old values were
		    #	defaults.  This makes ./configure changes effective.
		    if (mem["Configure_DCC_LIBEXEC"] == mem["DCC_LIBEXEC"]) {
			defined["DCC_LIBEXEC"] = 0;
		    }
		    if (mem["Configure_DCC_RUNDIR"] == mem["DCC_RUNDIR"]) {
			defined["DCC_RUNDIR"] = 0;
		    }
		    if (mem["Configure_DCCSUID"] == mem["DCCSUID"]) {
			defined["DCCSUID"] = 0;
		    }
		    if (mem["Configure_DCC_LOGGER"] == mem["DCC_LOGGER"]) {
			defined["DCC_LOGGER"] = 0;
		    }
		    # use new, configured values of some variables
		    if (defined["DCC_CONF_VERSION"])
			old_version = mem["DCC_CONF_VERSION"];
		    defined["DCC_CONF_VERSION"] = 0;
		    defined["Configure_DCC_LIBEXEC"] = 0;
		    defined["Configure_DCC_RUNDIR"] = 0;
		    defined["Configure_DCCSUID"] = 0;
		    defined["Configure_DCC_LOGGER"] = 0;
		}
		if (defined[key]) {
		    if (comments[key] && old_version > 3) {
			print comments[key];
		    }
		    print key "=" mem[key];
		} else {
		    print line;
		}
	    }
	}
	!/^[ABCDEFGHIJKLMNOPQRSTUVWXYZ]/ {
	    if (FILENAME != first_file) {
		print $0;
	    } else {
		if ($0 ~ /^ *#/ && $1 != "#") {
		    if (cur_comment) {
			cur_comment = cur_comment "\n" $0;
		    } else {
			cur_comment = $0;
		    }
		}
	    }
	}' $CUR $PROTOTYPE >$OUT


# test the result
. $OUT
if test -n "dcc" -a "dcc" != "$DCCUID"; then
    echo "./configure --with-uid=dcc conflicts with DCCUID=$DCCUID in $CUR" 1>&2
fi