[unix-history] / usr / src / bin / rcp / rcp.c

#ifndef lint
static char sccsid[] = "@(#)rcp.c	4.10 84/02/13";
#endif

/*
 * rcp
 */
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/ioctl.h>

#include <netinet/in.h>

#include <stdio.h>
#include <signal.h>
#include <pwd.h>
#include <ctype.h>
#include <errno.h>

int	rem;
char	*colon(), *index(), *rindex(), *malloc(), *strcpy(), *sprintf();
int	errs;
int	lostconn();
int	iamremote;

int	errno;
char	*sys_errlist[];
int	iamremote, targetshouldbedirectory;
int	iamrecursive;
struct	passwd *pwd;
struct	passwd *getpwuid();

/*VARARGS*/
int	error();

#define	ga()	 	(void) write(rem, "", 1)

main(argc, argv)
	int argc;
	char **argv;
{
	char *targ, *host, *src;
	char *suser, *tuser;
	int i;
	char buf[BUFSIZ], cmd[16];
	
	setpwent();
	pwd = getpwuid(getuid());
	endpwent();
	if (pwd == 0) {
		fprintf(stderr, "who are you?\n");
		exit(1);
	}
	argc--, argv++;
	if (argc > 0 && !strcmp(*argv, "-r")) {
		iamrecursive++;
		argc--, argv++;
	}
	if (argc > 0 && !strcmp(*argv, "-d")) {
		targetshouldbedirectory = 1;
		argc--, argv++;
	}
	if (argc > 0 && !strcmp(*argv, "-f")) {
		argc--, argv++; iamremote = 1;
		(void) response();
		(void) setuid(getuid());
		source(argc, argv);
		exit(errs);
	}
	if (argc > 0 && !strcmp(*argv, "-t")) {
		argc--, argv++; iamremote = 1;
		(void) setuid(getuid());
		sink(argc, argv);
		exit(errs);
	}
	rem = -1;
	if (argc > 2)
		targetshouldbedirectory = 1;
	(void) sprintf(cmd, "rcp%s%s",
	    iamrecursive ? " -r" : "", targetshouldbedirectory ? " -d" : "");
	signal(SIGPIPE, lostconn);
	targ = colon(argv[argc - 1]);
	if (targ) {
		*targ++ = 0;
		if (*targ == 0)
			targ = ".";
		tuser = rindex(argv[argc - 1], '.');
		if (tuser) {
			*tuser++ = 0;
			if (!okname(tuser))
				exit(1);
		} else
			tuser = pwd->pw_name;
		for (i = 0; i < argc - 1; i++) {
			src = colon(argv[i]);
			if (src) {
				*src++ = 0;
				if (*src == 0)
					src = ".";
				suser = rindex(argv[i], '.');
				if (suser) {
					*suser++ = 0;
					if (!okname(suser))
						continue;
		(void) sprintf(buf, "rsh %s -l %s -n %s %s '%s.%s:%s'",
					    argv[i], suser, cmd, src,
					    argv[argc - 1], tuser, targ);
				} else
		(void) sprintf(buf, "rsh %s -n %s %s '%s.%s:%s'",
					    argv[i], cmd, src,
					    argv[argc - 1], tuser, targ);
				(void) susystem(buf);
			} else {
				if (rem == -1) {
					(void) sprintf(buf, "%s -t %s",
					    cmd, targ);
					host = argv[argc - 1];
					rem = rcmd(&host, IPPORT_CMDSERVER,
					    pwd->pw_name, tuser,
					    buf, 0);
					if (rem < 0)
						exit(1);
					if (response() < 0)
						exit(1);
				}
				source(1, argv+i);
			}
		}
	} else {
		if (targetshouldbedirectory)
			verifydir(argv[argc - 1]);
		for (i = 0; i < argc - 1; i++) {
			src = colon(argv[i]);
			if (src == 0) {
				(void) sprintf(buf, "/bin/cp%s %s %s",
				    iamrecursive ? " -r" : "",
				    argv[i], argv[argc - 1]);
				(void) susystem(buf);
			} else {
				*src++ = 0;
				if (*src == 0)
					src = ".";
				suser = rindex(argv[i], '.');
				if (suser) {
					*suser++ = 0;
					if (!okname(suser))
						continue;
				} else
					suser = pwd->pw_name;
				(void) sprintf(buf, "%s -f %s", cmd, src);
				host = argv[i];
				rem = rcmd(&host, IPPORT_CMDSERVER,
				    pwd->pw_name, suser,
				    buf, 0);
				if (rem < 0)
					exit(1);
				sink(1, argv+argc-1);
				(void) close(rem);
				rem = -1;
			}
		}
	}
	exit(errs);
}

verifydir(cp)
	char *cp;
{
	struct stat stb;

	if (stat(cp, &stb) < 0)
		goto bad;
	if ((stb.st_mode & S_IFMT) == S_IFDIR)
		return;
	errno = ENOTDIR;
bad:
	error("rcp: %s: %s.\n", cp, sys_errlist[errno]);
	exit(1);
}

char *
colon(cp)
	char *cp;
{

	while (*cp) {
		if (*cp == ':')
			return (cp);
		if (*cp == '/')
			return (0);
		cp++;
	}
	return (0);
}

okname(cp0)
	char *cp0;
{
	register char *cp = cp0;
	register int c;

	do {
		c = *cp;
		if (c & 0200)
			goto bad;
		if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-')
			goto bad;
		cp++;
	} while (*cp);
	return (1);
bad:
	fprintf(stderr, "rcp: invalid user name %s\n", cp0);
	return (0);
}

susystem(buf)
	char *buf;
{

	if (fork() == 0) {
		(void) setuid(getuid());
		(void) system(buf);
		_exit(0);
	} else
		(void) wait((int *)0);
}

source(argc, argv)
	int argc;
	char **argv;
{
	char *last, *name;
	struct stat stb;
	char buf[BUFSIZ];
	int x, sizerr, f;
	off_t i;

	for (x = 0; x < argc; x++) {
		name = argv[x];
		if (access(name, 4) < 0 || (f = open(name, 0)) < 0) {
			error("rcp: %s: %s\n", name, sys_errlist[errno]);
			continue;
		}
		if (fstat(f, &stb) < 0)
			goto notreg;
		switch (stb.st_mode&S_IFMT) {

		case S_IFREG:
			break;

		case S_IFDIR:
			if (iamrecursive) {
				(void) close(f);
				rsource(name, (int)stb.st_mode);
				continue;
			}
			/* fall into ... */
		default:
notreg:
			(void) close(f);
			error("rcp: %s: not a plain file\n", name);
			continue;
		}
		last = rindex(name, '/');
		if (last == 0)
			last = name;
		else
			last++;
		(void) sprintf(buf, "C%04o %D %s\n",
		    stb.st_mode&07777, stb.st_size, last);
		(void) write(rem, buf, strlen(buf));
		if (response() < 0) {
			(void) close(f);
			continue;
		}
		sizerr = 0;
		for (i = 0; i < stb.st_size; i += BUFSIZ) {
			int amt = BUFSIZ;
			if (i + amt > stb.st_size)
				amt = stb.st_size - i;
			if (sizerr == 0 && read(f, buf, amt) != amt)
				sizerr = 1;
			(void) write(rem, buf, amt);
		}
		(void) close(f);
		if (sizerr == 0)
			ga();
		else
			error("rcp: %s: file changed size\n", name);
		(void) response();
	}
}

#include <sys/dir.h>

rsource(name, mode)
	char *name;
	int mode;
{
	DIR *d = opendir(name);
	char *last;
	struct direct *dp;
	char buf[BUFSIZ];
	char *bufv[1];

	if (d == 0) {
		error("%s: %s\n", name, sys_errlist[errno]);
		return;
	}
	last = rindex(name, '/');
	if (last == 0)
		last = name;
	else
		last++;
	(void) sprintf(buf, "D%04o %d %s\n", mode&07777, 0, last);
	(void) write(rem, buf, strlen(buf));
	if (response() < 0) {
		closedir(d);
		return;
	}
	while (dp = readdir(d)) {
		if (dp->d_ino == 0)
			continue;
		if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
			continue;
		if (strlen(name) + 1 + strlen(dp->d_name) >= BUFSIZ - 1) {
			error("%s/%s: Name too long.\n", name, dp->d_name);
			continue;
		}
		(void) sprintf(buf, "%s/%s", name, dp->d_name);
		bufv[0] = buf;
		source(1, bufv);
	}
	closedir(d);
	(void) write(rem, "E\n", 2);
	(void) response();
}

response()
{
	char resp, c, rbuf[BUFSIZ], *cp = rbuf;

	if (read(rem, &resp, 1) != 1)
		lostconn();
	switch (resp) {

	case 0:
		return (0);

	default:
		*cp++ = resp;
		/* fall into... */
	case 1:
	case 2:
		do {
			if (read(rem, &c, 1) != 1)
				lostconn();
			*cp++ = c;
		} while (cp < &rbuf[BUFSIZ] && c != '\n');
		if (iamremote == 0)
			(void) write(2, rbuf, cp - rbuf);
		errs++;
		if (resp == 1)
			return (-1);
		exit(1);
	}
	/*NOTREACHED*/
}

lostconn()
{

	if (iamremote == 0)
		fprintf(stderr, "rcp: lost connection\n");
	exit(1);
}

sink(argc, argv)
	int argc;
	char **argv;
{
	char *targ;
	char cmdbuf[BUFSIZ], nambuf[BUFSIZ], buf[BUFSIZ], *cp;
	int of, mode, wrerr, exists, first;
	off_t i, size;
	char *whopp;
	struct stat stb; int targisdir = 0;
#define	SCREWUP(str)	{ whopp = str; goto screwup; }
	int mask = umask(0);
	char *myargv[1];

	umask(mask);
	if (argc > 1) {
		error("rcp: ambiguous target\n");
		exit(1);
	}
	targ = *argv;
	if (targetshouldbedirectory)
		verifydir(targ);
	ga();
	if (stat(targ, &stb) == 0 && (stb.st_mode & S_IFMT) == S_IFDIR)
		targisdir = 1;
	for (first = 1; ; first = 0) {
		cp = cmdbuf;
		if (read(rem, cp, 1) <= 0)
			return;
		if (*cp++ == '\n')
			SCREWUP("unexpected '\\n'");
		do {
			if (read(rem, cp, 1) != 1)
				SCREWUP("lost connection");
		} while (*cp++ != '\n');
		*cp = 0;
		if (cmdbuf[0] == '\01' || cmdbuf[0] == '\02') {
			if (iamremote == 0)
				(void) write(2, cmdbuf+1, strlen(cmdbuf+1));
			if (cmdbuf[0] == '\02')
				exit(1);
			errs++;
			continue;
		}
		*--cp = 0;
		cp = cmdbuf;
		if (*cp == 'E') {
			ga();
			return;
		}
		if (*cp != 'C' && *cp != 'D') {
			/*
			 * Check for the case "rcp remote:foo\* local:bar".
			 * In this case, the line "No match." can be returned
			 * by the shell before the rcp command on the remote is
			 * executed so the ^Aerror_message convention isn't
			 * followed.
			 */
			if (first) {
				error("%s\n", cp);
				exit(1);
			}
			SCREWUP("expected control record");
		}
		cp++;
		mode = 0;
		for (; cp < cmdbuf+5; cp++) {
			if (*cp < '0' || *cp > '7')
				SCREWUP("bad mode");
			mode = (mode << 3) | (*cp - '0');
		}
		if (*cp++ != ' ')
			SCREWUP("mode not delimited");
		size = 0;
		while (*cp >= '0' && *cp <= '9')
			size = size * 10 + (*cp++ - '0');
		if (*cp++ != ' ')
			SCREWUP("size not delimited");
		if (targisdir)
			(void) sprintf(nambuf, "%s%s%s", targ,
			    *targ ? "/" : "", cp);
		else
			(void) strcpy(nambuf, targ);
		exists = stat(nambuf, &stb) == 0;
		if (exists && access(nambuf, 2) < 0)
			goto bad2;
		{ char *slash = rindex(nambuf, '/'), *dir;
		  if (slash == 0) {
			slash = "/";
			dir = ".";
		  } else {
			*slash = 0;
			dir = nambuf;
			if (*dir == '\0')
				dir = "/";
		  }
		  if (exists == 0 && access(dir, 2) < 0)
			goto bad;
		  *slash = '/';
		  if (cmdbuf[0] == 'D') {
			if (stat(nambuf, &stb) == 0) {
				if ((stb.st_mode&S_IFMT) != S_IFDIR) {
					errno = ENOTDIR;
					goto bad;
				}
			} else if (mkdir(nambuf, mode) < 0)
				goto bad;
			myargv[0] = nambuf;
			sink(1, myargv);
			continue;
		  }
		  if ((of = creat(nambuf, mode)) < 0) {
	bad:
			*slash = '/';
	bad2:
			error("rcp: %s: %s\n", nambuf, sys_errlist[errno]);
			continue;
		  }
		}
		if (exists == 0) {
			(void) stat(nambuf, &stb);
			(void) chown(nambuf, pwd->pw_uid, stb.st_gid);
			(void) chmod(nambuf, mode &~ mask);
		}
		ga();
		wrerr = 0;
		for (i = 0; i < size; i += BUFSIZ) {
			int amt = BUFSIZ;
			char *cp = buf;

			if (i + amt > size)
				amt = size - i;
			do {
				int j = read(rem, cp, amt);

				if (j <= 0)
					exit(1);
				amt -= j;
				cp += j;
			} while (amt > 0);
			amt = BUFSIZ;
			if (i + amt > size)
				amt = size - i;
			if (wrerr == 0 && write(of, buf, amt) != amt)
				wrerr++;
		}
		(void) close(of);
		(void) response();
		if (wrerr)
			error("rcp: %s: %s\n", cp, sys_errlist[errno]);
		else
			ga();
	}
screwup:
	error("rcp: protocol screwup: %s\n", whopp);
	exit(1);
}

/*VARARGS*/
error(fmt, a1, a2, a3, a4, a5)
	char *fmt;
	int a1, a2, a3, a4, a5;
{
	char buf[BUFSIZ], *cp = buf;

	errs++;
	*cp++ = 1;
	(void) sprintf(cp, fmt, a1, a2, a3, a4, a5);
	(void) write(rem, buf, strlen(buf));
	if (iamremote == 0)
		(void) write(2, buf+1, strlen(buf+1));
}

mkdir(name, mode)
	char *name;
	int mode;
{
	char *argv[4];
	int pid, rc;

	argv[0] = "mkdir";
	argv[1] = name;
	argv[2] = 0;
	pid = fork();
	if (pid < 0) {
		perror("cp");
		return (1);
	}
	if (pid) {
		while (wait(&rc) != pid)
			continue;
		if (rc == 0)
			if (chmod(name, mode) < 0) {
				perror(name);
				rc = 1;
			}
		return (rc);
	}
	(void) setuid(getuid());
	execv("/bin/mkdir", argv);
	execv("/usr/bin/mkdir", argv);
	perror("mkdir");
	_exit(1);
	/*NOTREACHED*/
}
Commit	Line	Data
b7ff3bb3	1	#ifndef lint
04f0ebce	2	static char sccsid[] = "@(#)rcp.c 4.10 84/02/13";
b7ff3bb3 BJ	3	#endif
b7ff3bb3 BJ	4
4ca10280 SL	5	/*
	6	* rcp
	7	*/
ed0072ae	8	#include <sys/param.h>
b7ff3bb3 BJ	9	#include <sys/stat.h>
b7ff3bb3 BJ	10	#include <sys/ioctl.h>
94a2d2a7 SL	11
	12	#include <netinet/in.h>
	13
	14	#include <stdio.h>
	15	#include <signal.h>
b7ff3bb3 BJ	16	#include <pwd.h>
	17	#include <ctype.h>
	18	#include <errno.h>
4ca10280	19
b7ff3bb3 BJ	20	int rem;
	21	char colon(), index(), rindex(), malloc(), strcpy(), sprintf();
	22	int errs;
	23	int lostconn();
	24	int iamremote;
	25
	26	int errno;
	27	char *sys_errlist[];
	28	int iamremote, targetshouldbedirectory;
	29	int iamrecursive;
	30	struct passwd *pwd;
	31	struct passwd *getpwuid();
	32
	33	/VARARGS/
	34	int error();
	35
	36	#define ga() (void) write(rem, "", 1)
	37
	38	main(argc, argv)
	39	int argc;
	40	char **argv;
	41	{
	42	char targ, host, *src;
	43	char suser, tuser;
	44	int i;
	45	char buf[BUFSIZ], cmd[16];
	46
	47	setpwent();
	48	pwd = getpwuid(getuid());
	49	endpwent();
	50	if (pwd == 0) {
	51	fprintf(stderr, "who are you?\n");
	52	exit(1);
	53	}
	54	argc--, argv++;
	55	if (argc > 0 && !strcmp(*argv, "-r")) {
	56	iamrecursive++;
	57	argc--, argv++;
	58	}
	59	if (argc > 0 && !strcmp(*argv, "-d")) {
	60	targetshouldbedirectory = 1;
	61	argc--, argv++;
	62	}
	63	if (argc > 0 && !strcmp(*argv, "-f")) {
	64	argc--, argv++; iamremote = 1;
	65	(void) response();
	66	(void) setuid(getuid());
	67	source(argc, argv);
	68	exit(errs);
	69	}
	70	if (argc > 0 && !strcmp(*argv, "-t")) {
	71	argc--, argv++; iamremote = 1;
	72	(void) setuid(getuid());
	73	sink(argc, argv);
	74	exit(errs);
	75	}
	76	rem = -1;
	77	if (argc > 2)
	78	targetshouldbedirectory = 1;
	79	(void) sprintf(cmd, "rcp%s%s",
	80	iamrecursive ? " -r" : "", targetshouldbedirectory ? " -d" : "");
4ca10280	81	signal(SIGPIPE, lostconn);
b7ff3bb3 BJ	82	targ = colon(argv[argc - 1]);
	83	if (targ) {
	84	*targ++ = 0;
06fb72f5 SL	85	if (*targ == 0)
06fb72f5 SL	86	targ = ".";
b7ff3bb3 BJ	87	tuser = rindex(argv[argc - 1], '.');
	88	if (tuser) {
	89	*tuser++ = 0;
	90	if (!okname(tuser))
	91	exit(1);
	92	} else
	93	tuser = pwd->pw_name;
	94	for (i = 0; i < argc - 1; i++) {
	95	src = colon(argv[i]);
	96	if (src) {
	97	*src++ = 0;
06fb72f5	98	if (*src == 0)
195c1de2	99	src = ".";
b7ff3bb3 BJ	100	suser = rindex(argv[i], '.');
	101	if (suser) {
	102	*suser++ = 0;
	103	if (!okname(suser))
	104	continue;
bd864c30 RC	105	(void) sprintf(buf, "rsh %s -l %s -n %s %s '%s.%s:%s'",
	106	argv[i], suser, cmd, src,
	107	argv[argc - 1], tuser, targ);
b7ff3bb3	108	} else
bd864c30 RC	109	(void) sprintf(buf, "rsh %s -n %s %s '%s.%s:%s'",
	110	argv[i], cmd, src,
	111	argv[argc - 1], tuser, targ);
b7ff3bb3 BJ	112	(void) susystem(buf);
	113	} else {
	114	if (rem == -1) {
	115	(void) sprintf(buf, "%s -t %s",
	116	cmd, targ);
	117	host = argv[argc - 1];
	118	rem = rcmd(&host, IPPORT_CMDSERVER,
	119	pwd->pw_name, tuser,
	120	buf, 0);
	121	if (rem < 0)
	122	exit(1);
	123	if (response() < 0)
	124	exit(1);
	125	}
	126	source(1, argv+i);
	127	}
	128	}
	129	} else {
	130	if (targetshouldbedirectory)
	131	verifydir(argv[argc - 1]);
	132	for (i = 0; i < argc - 1; i++) {
	133	src = colon(argv[i]);
	134	if (src == 0) {
	135	(void) sprintf(buf, "/bin/cp%s %s %s",
	136	iamrecursive ? " -r" : "",
	137	argv[i], argv[argc - 1]);
	138	(void) susystem(buf);
	139	} else {
	140	*src++ = 0;
06fb72f5 SL	141	if (*src == 0)
06fb72f5 SL	142	src = ".";
b7ff3bb3 BJ	143	suser = rindex(argv[i], '.');
	144	if (suser) {
	145	*suser++ = 0;
	146	if (!okname(suser))
	147	continue;
	148	} else
	149	suser = pwd->pw_name;
	150	(void) sprintf(buf, "%s -f %s", cmd, src);
	151	host = argv[i];
	152	rem = rcmd(&host, IPPORT_CMDSERVER,
	153	pwd->pw_name, suser,
	154	buf, 0);
	155	if (rem < 0)
	156	exit(1);
	157	sink(1, argv+argc-1);
	158	(void) close(rem);
	159	rem = -1;
	160	}
	161	}
	162	}
	163	exit(errs);
	164	}
	165
	166	verifydir(cp)
	167	char *cp;
	168	{
	169	struct stat stb;
	170
	171	if (stat(cp, &stb) < 0)
	172	goto bad;
	173	if ((stb.st_mode & S_IFMT) == S_IFDIR)
	174	return;
	175	errno = ENOTDIR;
	176	bad:
	177	error("rcp: %s: %s.\n", cp, sys_errlist[errno]);
	178	exit(1);
	179	}
	180
	181	char *
	182	colon(cp)
	183	char *cp;
	184	{
	185
	186	while (*cp) {
	187	if (*cp == ':')
	188	return (cp);
	189	if (*cp == '/')
	190	return (0);
	191	cp++;
	192	}
	193	return (0);
	194	}
	195
	196	okname(cp0)
	197	char *cp0;
	198	{
	199	register char *cp = cp0;
	200	register int c;
	201
	202	do {
	203	c = *cp;
	204	if (c & 0200)
	205	goto bad;
	206	if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-')
207	goto bad;
208	cp++;
209	} while (*cp);
210	return (1);
211	bad:
212	fprintf(stderr, "rcp: invalid user name %s\n", cp0);
213	return (0);
214	}
215
216	susystem(buf)
217	char *buf;
218	{
219
220	if (fork() == 0) {
221	(void) setuid(getuid());
222	(void) system(buf);
223	_exit(0);
224	} else
225	(void) wait((int *)0);
226	}
227
228	source(argc, argv)
229	int argc;
230	char **argv;
231	{
232	char last, name;
233	struct stat stb;
234	char buf[BUFSIZ];
5f10dd79 KM	235	int x, sizerr, f;
5f10dd79 KM	236	off_t i;
b7ff3bb3 BJ	237
	238	for (x = 0; x < argc; x++) {
	239	name = argv[x];
	240	if (access(name, 4) < 0 \|\| (f = open(name, 0)) < 0) {
	241	error("rcp: %s: %s\n", name, sys_errlist[errno]);
	242	continue;
	243	}
	244	if (fstat(f, &stb) < 0)
	245	goto notreg;
	246	switch (stb.st_mode&S_IFMT) {
	247
	248	case S_IFREG:
	249	break;
	250
	251	case S_IFDIR:
	252	if (iamrecursive) {
	253	(void) close(f);
	254	rsource(name, (int)stb.st_mode);
	255	continue;
	256	}
	257	/* fall into ... */
	258	default:
	259	notreg:
	260	(void) close(f);
	261	error("rcp: %s: not a plain file\n", name);
	262	continue;
	263	}
	264	last = rindex(name, '/');
	265	if (last == 0)
	266	last = name;
	267	else
	268	last++;
5f10dd79	269	(void) sprintf(buf, "C%04o %D %s\n",
b7ff3bb3 BJ	270	stb.st_mode&07777, stb.st_size, last);
	271	(void) write(rem, buf, strlen(buf));
	272	if (response() < 0) {
	273	(void) close(f);
	274	continue;
	275	}
	276	sizerr = 0;
	277	for (i = 0; i < stb.st_size; i += BUFSIZ) {
	278	int amt = BUFSIZ;
	279	if (i + amt > stb.st_size)
	280	amt = stb.st_size - i;
	281	if (sizerr == 0 && read(f, buf, amt) != amt)
	282	sizerr = 1;
	283	(void) write(rem, buf, amt);
	284	}
	285	(void) close(f);
	286	if (sizerr == 0)
	287	ga();
	288	else
	289	error("rcp: %s: file changed size\n", name);
	290	(void) response();
	291	}
	292	}
	293
06fb72f5	294	#include <sys/dir.h>
b7ff3bb3 BJ	295
	296	rsource(name, mode)
	297	char *name;
	298	int mode;
	299	{
	300	DIR *d = opendir(name);
	301	char *last;
	302	struct direct *dp;
	303	char buf[BUFSIZ];
	304	char *bufv[1];
	305
	306	if (d == 0) {
	307	error("%s: %s\n", name, sys_errlist[errno]);
	308	return;
	309	}
	310	last = rindex(name, '/');
	311	if (last == 0)
	312	last = name;
	313	else
	314	last++;
	315	(void) sprintf(buf, "D%04o %d %s\n", mode&07777, 0, last);
	316	(void) write(rem, buf, strlen(buf));
	317	if (response() < 0) {
	318	closedir(d);
	319	return;
	320	}
	321	while (dp = readdir(d)) {
	322	if (dp->d_ino == 0)
	323	continue;
	324	if (!strcmp(dp->d_name, ".") \|\| !strcmp(dp->d_name, ".."))
	325	continue;
	326	if (strlen(name) + 1 + strlen(dp->d_name) >= BUFSIZ - 1) {
	327	error("%s/%s: Name too long.\n", name, dp->d_name);
	328	continue;
	329	}
	330	(void) sprintf(buf, "%s/%s", name, dp->d_name);
	331	bufv[0] = buf;
	332	source(1, bufv);
	333	}
	334	closedir(d);
	335	(void) write(rem, "E\n", 2);
	336	(void) response();
	337	}
	338
	339	response()
	340	{
	341	char resp, c, rbuf[BUFSIZ], *cp = rbuf;
	342
	343	if (read(rem, &resp, 1) != 1)
	344	lostconn();
	345	switch (resp) {
	346
	347	case 0:
	348	return (0);
	349
	350	default:
	351	*cp++ = resp;
	352	/* fall into... */
	353	case 1:
	354	case 2:
	355	do {
	356	if (read(rem, &c, 1) != 1)
	357	lostconn();
	358	*cp++ = c;
359	} while (cp < &rbuf[BUFSIZ] && c != '\n');
360	if (iamremote == 0)
361	(void) write(2, rbuf, cp - rbuf);
362	errs++;
363	if (resp == 1)
364	return (-1);
365	exit(1);
366	}
367	/NOTREACHED/
368	}
369
370	lostconn()
371	{
372
373	if (iamremote == 0)
374	fprintf(stderr, "rcp: lost connection\n");
375	exit(1);
376	}
377
378	sink(argc, argv)
379	int argc;
380	char **argv;
381	{
382	char *targ;
383	char cmdbuf[BUFSIZ], nambuf[BUFSIZ], buf[BUFSIZ], *cp;
4550ab9e	384	int of, mode, wrerr, exists, first;
5f10dd79	385	off_t i, size;
b7ff3bb3 BJ	386	char *whopp;
	387	struct stat stb; int targisdir = 0;
	388	#define SCREWUP(str) { whopp = str; goto screwup; }
	389	int mask = umask(0);
	390	char *myargv[1];
	391
	392	umask(mask);
	393	if (argc > 1) {
	394	error("rcp: ambiguous target\n");
	395	exit(1);
	396	}
	397	targ = *argv;
	398	if (targetshouldbedirectory)
	399	verifydir(targ);
	400	ga();
	401	if (stat(targ, &stb) == 0 && (stb.st_mode & S_IFMT) == S_IFDIR)
	402	targisdir = 1;
4550ab9e	403	for (first = 1; ; first = 0) {
b7ff3bb3 BJ	404	cp = cmdbuf;
	405	if (read(rem, cp, 1) <= 0)
	406	return;
	407	if (*cp++ == '\n')
	408	SCREWUP("unexpected '\\n'");
	409	do {
	410	if (read(rem, cp, 1) != 1)
	411	SCREWUP("lost connection");
	412	} while (*cp++ != '\n');
	413	*cp = 0;
	414	if (cmdbuf[0] == '\01' \|\| cmdbuf[0] == '\02') {
	415	if (iamremote == 0)
06fb72f5	416	(void) write(2, cmdbuf+1, strlen(cmdbuf+1));
b7ff3bb3 BJ	417	if (cmdbuf[0] == '\02')
	418	exit(1);
	419	errs++;
	420	continue;
	421	}
	422	*--cp = 0;
	423	cp = cmdbuf;
	424	if (*cp == 'E') {
	425	ga();
	426	return;
	427	}
4550ab9e RC	428	if (cp != 'C' && cp != 'D') {
	429	/*
	430	* Check for the case "rcp remote:foo\* local:bar".
	431	* In this case, the line "No match." can be returned
	432	* by the shell before the rcp command on the remote is
	433	* executed so the ^Aerror_message convention isn't
	434	* followed.
	435	*/
	436	if (first) {
	437	error("%s\n", cp);
	438	exit(1);
	439	}
b7ff3bb3	440	SCREWUP("expected control record");
4550ab9e	441	}
b7ff3bb3 BJ	442	cp++;
	443	mode = 0;
	444	for (; cp < cmdbuf+5; cp++) {
	445	if (cp < '0' \|\| cp > '7')
	446	SCREWUP("bad mode");
	447	mode = (mode << 3) \| (*cp - '0');
	448	}
	449	if (*cp++ != ' ')
	450	SCREWUP("mode not delimited");
	451	size = 0;
	452	while (cp >= '0' && cp <= '9')
	453	size = size * 10 + (*cp++ - '0');
	454	if (*cp++ != ' ')
	455	SCREWUP("size not delimited");
	456	if (targisdir)
	457	(void) sprintf(nambuf, "%s%s%s", targ,
	458	*targ ? "/" : "", cp);
	459	else
	460	(void) strcpy(nambuf, targ);
	461	exists = stat(nambuf, &stb) == 0;
	462	if (exists && access(nambuf, 2) < 0)
	463	goto bad2;
	464	{ char slash = rindex(nambuf, '/'), dir;
	465	if (slash == 0) {
	466	slash = "/";
	467	dir = ".";
	468	} else {
	469	*slash = 0;
	470	dir = nambuf;
04f0ebce RC	471	if (*dir == '\0')
04f0ebce RC	472	dir = "/";
b7ff3bb3 BJ	473	}
	474	if (exists == 0 && access(dir, 2) < 0)
	475	goto bad;
	476	*slash = '/';
	477	if (cmdbuf[0] == 'D') {
	478	if (stat(nambuf, &stb) == 0) {
	479	if ((stb.st_mode&S_IFMT) != S_IFDIR) {
	480	errno = ENOTDIR;
	481	goto bad;
	482	}
	483	} else if (mkdir(nambuf, mode) < 0)
	484	goto bad;
	485	myargv[0] = nambuf;
	486	sink(1, myargv);
	487	continue;
	488	}
	489	if ((of = creat(nambuf, mode)) < 0) {
	490	bad:
	491	*slash = '/';
	492	bad2:
	493	error("rcp: %s: %s\n", nambuf, sys_errlist[errno]);
	494	continue;
	495	}
	496	}
	497	if (exists == 0) {
	498	(void) stat(nambuf, &stb);
	499	(void) chown(nambuf, pwd->pw_uid, stb.st_gid);
	500	(void) chmod(nambuf, mode &~ mask);
	501	}
	502	ga();
	503	wrerr = 0;
	504	for (i = 0; i < size; i += BUFSIZ) {
	505	int amt = BUFSIZ;
	506	char *cp = buf;
	507
	508	if (i + amt > size)
	509	amt = size - i;
	510	do {
	511	int j = read(rem, cp, amt);
	512
	513	if (j <= 0)
	514	exit(1);
	515	amt -= j;
	516	cp += j;
	517	} while (amt > 0);
	518	amt = BUFSIZ;
	519	if (i + amt > size)
	520	amt = size - i;
	521	if (wrerr == 0 && write(of, buf, amt) != amt)
	522	wrerr++;
	523	}
	524	(void) close(of);
	525	(void) response();
	526	if (wrerr)
	527	error("rcp: %s: %s\n", cp, sys_errlist[errno]);
	528	else
	529	ga();
	530	}
	531	screwup:
	532	error("rcp: protocol screwup: %s\n", whopp);
	533	exit(1);
	534	}
	535
	536	/VARARGS/
537	error(fmt, a1, a2, a3, a4, a5)
538	char *fmt;
539	int a1, a2, a3, a4, a5;
540	{
541	char buf[BUFSIZ], *cp = buf;
542
543	errs++;
544	*cp++ = 1;
545	(void) sprintf(cp, fmt, a1, a2, a3, a4, a5);
546	(void) write(rem, buf, strlen(buf));
547	if (iamremote == 0)
548	(void) write(2, buf+1, strlen(buf+1));
549	}
550
551	mkdir(name, mode)
552	char *name;
553	int mode;
554	{
555	char *argv[4];
556	int pid, rc;
557
558	argv[0] = "mkdir";
559	argv[1] = name;
560	argv[2] = 0;
561	pid = fork();
562	if (pid < 0) {
563	perror("cp");
564	return (1);
565	}
566	if (pid) {
567	while (wait(&rc) != pid)
568	continue;
569	if (rc == 0)
570	if (chmod(name, mode) < 0) {
571	perror(name);
572	rc = 1;
573	}
574	return (rc);
575	}
576	(void) setuid(getuid());
577	execv("/bin/mkdir", argv);
578	execv("/usr/bin/mkdir", argv);
579	perror("mkdir");
580	_exit(1);
581	/NOTREACHED/
582	}