readcd

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

cdrom=/dev/sdC1

switch($#*){
case 3
	starttrack = `{echo $1 - 1 | hoc}
	endtrack = `{echo $2 - 1 | hoc}
	desttrack = $3
case *
	echo Usage readcd starttrack endtrack desttrack
}

if(test -e /mnt/cd/ctl){
	echo -n ingest >/mnt/cd/ctl >[2]/dev/null
}
if not {
	if (~ $cdrom '')	cdfs
	if not		cdfs -d $cdrom
}

>/tmp/readcd
>/tmp/map
cat /mnt/cd/ctl
sed 1q /mnt/cd/ctl | rc
echo $starttrack $endtrack $desttrack | awk '{
	start = $1
	finish = $2
	dest = $3
	print "read cd tracks " start "-" finish " starting at " dest
	for (i = start; i <= finish; i++) {
		cmd = sprintf("ls -l /mnt/cd/a%3.3d | awk ''{print $6}''>>/tmp/readcd", i)
		system(cmd)
		getline x<"/tmp/readcd"
		sec = x/44100/4
		min = sec/60
		sec = sec%60
		printf("track {\n\t\n\tfile {%3.3d}\n\ttime {%d:%2.2d}\n}\n",i+dest-start,min,sec)>"/tmp/map"
	}
	for (i = start; i <= finish; i++) {
		cmd = sprintf("/bin/games/pacenc /mnt/cd/a%3.3d %3.3d",i,i+dest-start)
		print cmd
		system(cmd)
	}
}'
echo eject >/mnt/cd/ctl