#include <u.h>#include <libc.h>#include <../boot/boot.h> static char diskname[64];static char *disk;static char **args; voidconfiglocal(Method *mp){	char *p;	int n; 	if(*sys == '/' || *sys == '#'){		/*		 *  if the user specifies the disk in the boot cmd or		 * 'root is from' prompt, use it		 */		disk = sys;	} else if(strncmp(argv0, "dksc(0,", 7) == 0){		/*		 *  on many mips arg0 of the boot command specifies the		 *  scsi logical unit number		 */		p = strchr(argv0, ',');		n = strtoul(p+1, 0, 10);		sprint(diskname, "#w%d/sd%dfs", n, n);		disk = diskname;	} else if(mp->arg){		/*		 *  a default is supplied when the kernel is made		 */		disk = mp->arg;	} else if(*bootdisk){		/*		 *  an environment variable from a pc's plan9.ini or		 *  from the mips nvram or generated by the kernel		 *  is the last resort.		 */		disk = bootdisk;	} 	/* if we've decided on one, pass it on to all programs */	if(disk)		setenv("bootdisk", disk); 	USED(mp);} intconnectlocalkfs(void){	int i, pid, fd, p[2];	char partition[64];	char *dev;	char **arg, **argp;	Dir *d; 	if(stat("/boot/kfs", statbuf, sizeof statbuf) < 0)		return -1; 	dev = disk ? disk : bootdisk;	snprint(partition, sizeof partition, "%sfs", dev);	fd = open(partition, OREAD);	if(fd < 0){		strcpy(partition, dev);		fd = open(partition, OREAD);		if(fd < 0)			return -1;	}	/*	 * can't do this check -- might be some other server posing as kfs.	 *	memset(buf, 0, sizeof buf);	pread(fd, buf, 512, 0);	close(fd);	if(memcmp(buf+256, "kfs wren device\n", 16) != 0){		if(strstr(partition, "/fs"))			print("no kfs file system found on %s\n", partition);		return -1;	}	 *	 */	d = dirfstat(fd);	close(fd);	if(d == nil)		return -1;	if(d->mode&DMDIR){		free(d);		return -1;	}	free(d); 	print("kfs...");	if(pipe(p)<0)		fatal("pipe");	switch(pid = fork()){	case -1:		fatal("fork");	case 0:		arg = malloc((bargc+5)*sizeof(char*));		argp = arg;		*argp++ = "kfs";		*argp++ = "-f";		*argp++ = partition;		*argp++ = "-s";		for(i=1; i<bargc; i++)			*argp++ = bargv[i];		*argp = 0; 		dup(p[0], 0);		dup(p[1], 1);		close(p[0]);		close(p[1]);		exec("/boot/kfs", arg);		fatal("can't exec kfs");	default:		break;	}	for(;;){		if((i = waitpid()) == -1)			fatal("waitpid for kfs failed");		if(i == pid)			break;	} 	close(p[1]);	return p[0];} voidrun(char *file, ...){	int i, pid; 	switch(pid = fork()){	case -1:		fatal("fork");	case 0:		exec(file, &file);		fatal(smprint("can't exec %s: %r", file));	default:		while ((i = waitpid()) != pid && i != -1)			;		if(i == -1)			fatal(smprint("wait failed running %s", file));	}} static intprint1(int fd, char *s){	return write(fd, s, strlen(s));} voidconfigloopback(void){	int fd; 	if((fd = open("/net/ipifc/clone", ORDWR)) < 0){		bind("#I", "/net", MAFTER);		if((fd = open("/net/ipifc/clone", ORDWR)) < 0)			fatal("open /net/ipifc/clone for loopback");	}	if(print1(fd, "bind loopback /dev/null") < 0	|| print1(fd, "add 127.0.0.1 255.255.255.255") < 0)		fatal("write /net/ipifc/clone for loopback");} intconnectlocalfossil(void){	int fd;	char *venti, *f[32], *p;	int nf;	char partition[128], buf[512];	char *dev; 	if(stat("/boot/fossil", statbuf, sizeof statbuf) < 0)		return -1; 	/* look for fossil partition */	dev = disk ? disk : bootdisk;	snprint(partition, sizeof partition, "%sfossil", dev);	fd = open(partition, OREAD);	if(fd < 0){		strcpy(partition, dev);		fd = open(partition, OREAD);		if(fd < 0)			return -1;	}	memset(buf, 0, sizeof buf);	pread(fd, buf, 512, 127*1024);	close(fd);	if(memcmp(buf, "fossil config\n", 14) != 0){		if(strstr(partition, "/fossil"))			print("no fossil config found on %s\n", partition);		return -1;	} 	settime(1, -1, nil); 	/* make venti available */	if((venti = getenv("venti")) && (nf = tokenize(venti, f, nelem(f)))){		if((fd = open(f[0], OREAD)) >= 0){			print("venti...");			memset(buf, 0, sizeof buf);			pread(fd, buf, 512, 248*1024);			close(fd);			if(memcmp(buf, "venti config\n", 13) != 0){				print("no venti config found on %s\n", f[0]);				return -1;			}			if(stat("/boot/venti", statbuf, sizeof statbuf) < 0){				print("/boot/venti does not exist\n");				return -1;			}			switch(nf){			case 1:				f[1] = "tcp!127.1!17034";			case 2:				f[2] = "tcp!127.1!8000";			}			configloopback();			run("/boot/venti", "-c", f[0], "-a", f[1], "-h", f[2], 0);			/*			 * If the announce address is tcp!*!foo, then set			 * $venti to tcp!127.1!foo instead, which is actually dialable.			 */			if((p = strstr(f[1], "!*!")) != 0){				*p = 0;				snprint(buf, sizeof buf, "%s!127.1!%s", f[1], p+3);				f[1] = buf;			}			setenv("venti", f[1]);		}else{			/* set up the network so we can talk to the venti server */			/* this is such a crock. */			configip(nf, f, 0);			setenv("venti", f[0]);		}	} 	/* start fossil */	print("fossil(%s)...", partition);	run("/boot/fossil", "-f", partition, "-c", "srv -A fboot", "-c", "srv -p fscons", 0);	fd = open("#s/fboot", ORDWR);	if(fd < 0){		print("open #s/fboot: %r\n");		return -1;	}	remove("#s/fboot");	/* we'll repost as #s/boot */	return fd;} intconnectlocal(void){	int fd; 	if(bind("#c", "/dev", MREPL) < 0)		fatal("bind #c");	if(bind("#p", "/proc", MREPL) < 0)		fatal("bind #p");	bind("#æ", "/dev", MAFTER);	bind("#S", "/dev", MAFTER);	bind("#k", "/dev", MAFTER); 	if((fd = connectlocalfossil()) < 0)	if((fd = connectlocalkfs()) < 0)		return -1;	return fd;}