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#include <u.h>
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#include <libc.h>
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#include <../boot/boot.h>
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uchar statbuf[Statsz];
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int
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cache(int fd)
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{
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	int argc, i, p[2];
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	char *argv[5], bd[32], buf[256], partition[64], *pp;
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	if(stat("/boot/cfs", statbuf, sizeof statbuf) < 0)
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		return fd;
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	*partition = 0;
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	bind("#S", "/dev", MAFTER);
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	readfile("#e/cfs", buf, sizeof(buf));
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	if(*buf){
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		argc = tokenize(buf, argv, 4);
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		for(i = 0; i < argc; i++){
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			if(strcmp(argv[i], "off") == 0)
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				return fd;
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			else if(stat(argv[i], statbuf, sizeof statbuf) >= 0){
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				strncpy(partition, argv[i], sizeof(partition)-1);
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				partition[sizeof(partition)-1] = 0;
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			}
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		}
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	}
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	if(*partition == 0){
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		readfile("#e/bootdisk", bd, sizeof(bd));
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		if(*bd){
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			if(pp = strchr(bd, ':'))
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				*pp = 0;
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			/* damned artificial intelligence */
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			i = strlen(bd);
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			if(strcmp("disk", &bd[i-4]) == 0)
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				bd[i-4] = 0;
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			else if(strcmp("fs", &bd[i-2]) == 0)
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				bd[i-2] = 0;
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			else if(strcmp("fossil", &bd[i-6]) == 0)
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				bd[i-6] = 0;
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			sprint(partition, "%scache", bd);
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			if(stat(partition, statbuf, sizeof statbuf) < 0)
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				*bd = 0;
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		}
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		if(*bd == 0){
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			sprint(partition, "%scache", bootdisk);
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			if(stat(partition, statbuf, sizeof statbuf) < 0)
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				return fd;
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		}
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	}
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	print("cfs...");
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	if(pipe(p)<0)
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		fatal("pipe");
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	switch(fork()){
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	case -1:
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		fatal("fork");
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	case 0:
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		close(p[1]);
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		dup(fd, 0);
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		close(fd);
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		dup(p[0], 1);
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		close(p[0]);
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		if(fflag)
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			execl("/boot/cfs", "bootcfs", "-rs", "-f", partition, 0);
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		else
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			execl("/boot/cfs", "bootcfs", "-s", "-f", partition, 0);
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		break;
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	default:
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		close(p[0]);
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		close(fd);
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		fd = p[1];
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		break;
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	}
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	return fd;
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}