mkbootrules

这是一个同样来自贝尔实验室的和UNIX有着渊源的操作系统, 其简洁的设计和实现易于我们学习和理解

#!/bin/rc

rfork e
if(~ $#CONF 0)
	CONF=$1
awk -v 'objtype='$objtype -v 'CONF='$CONF '
BEGIN { nfs = 0 }
/^$/{
	next;
}
/^#/{
	next;
}
collect && /^[^ \t]/{
	collect = 0;
}
collect && section ~ "bootdir" {
	if(NF >= 2)
		x = $2;
	else{
		x = $1;
		sub(/.*\//, "", x);
	}
	fsname[nfs] = x;
	x = $1;
	gsub(/[^a-zA-Z0-9_]/, "_", x);
	fs[nfs] = x;
	file[nfs] = $1;
	nfs++;
}
$0 ~ /^[^ \t]/{
	if($0 ~ "bootdir"){
		section = $0;
		collect = 1;
	}
	next;
}

END{
	printf "%s.root.s:D:", CONF;
	for(i=0; i<nfs; i++)
		printf " %s", file[i];
	printf "\n";
	printf "\t../port/mkrootall \\\n";
	for(i=0; i<nfs; i++)
		printf "\t\t%s %s %s\\\n", fsname[i], fs[i], file[i];
	printf "\t>$target\n";

	printf "%s.rootc.c:D:", CONF;
	for(i=0; i<nfs; i++)
		printf " %s", file[i];
	printf "\n";
	printf "\t../port/mkrootc \\\n";
	for(i=0; i<nfs; i++)
		printf "\t\t%s %s %s\\\n", fsname[i], fs[i], file[i];
	printf "\t>$target\n";
}

' $*