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

#ifndef lint
static char sccsid[] = "@(#)rcp.c	4.1 82/04/02";
#endif

#include <stdio.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <net/in.h>
#include <pwd.h>
#include <ctype.h>
#include <errno.h>
/*
 * rcp
 */
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" : "");
	sigsys(SIGPIPE, lostconn);
	targ = colon(argv[argc - 1]);
	if (targ) {
		*targ++ = 0;
		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;
				suser = rindex(argv[i], '.');
				if (suser) {
					*suser++ = 0;
					if (!okname(suser))
						continue;
		(void) sprintf(buf, "rsh %s -l %s %s %s '%s:%s' </dev/null",
					    argv[i], suser, cmd,
					    src, argv[argc - 1], targ);
				} else
		(void) sprintf(buf, "rsh %s %s %s '%s:%s' </dev/null",
					    argv[i], cmd,
					    src, argv[argc - 1], 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;
				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, 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 <ndir.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, i, size, wrerr, exists;
	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 (;;) {
		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, strlen(cmdbuf));
			if (cmdbuf[0] == '\02')
				exit(1);
			errs++;
			continue;
		}
		*--cp = 0;
		cp = cmdbuf;
		if (*cp == 'E') {
			ga();
			return;
		}
		if (*cp != 'C' && *cp != 'D')
			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 (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 BJ	1	#ifndef lint
	2	static char sccsid[] = "@(#)rcp.c 4.1 82/04/02";
	3	#endif
	4
	5	#include <stdio.h>
	6	#include <signal.h>
	7	#include <sys/types.h>
	8	#include <sys/stat.h>
	9	#include <sys/ioctl.h>
	10	#include <net/in.h>
	11	#include <pwd.h>
	12	#include <ctype.h>
	13	#include <errno.h>
	14	/*
	15	* rcp
	16	*/
	17	int rem;
	18	char colon(), index(), rindex(), malloc(), strcpy(), sprintf();
	19	int errs;
	20	int lostconn();
	21	int iamremote;
	22
	23	int errno;
	24	char *sys_errlist[];
	25	int iamremote, targetshouldbedirectory;
	26	int iamrecursive;
	27	struct passwd *pwd;
	28	struct passwd *getpwuid();
	29
	30	/VARARGS/
	31	int error();
	32
	33	#define ga() (void) write(rem, "", 1)
	34
	35	main(argc, argv)
	36	int argc;
	37	char **argv;
	38	{
	39	char targ, host, *src;
	40	char suser, tuser;
	41	int i;
	42	char buf[BUFSIZ], cmd[16];
	43
	44	setpwent();
	45	pwd = getpwuid(getuid());
	46	endpwent();
	47	if (pwd == 0) {
	48	fprintf(stderr, "who are you?\n");
	49	exit(1);
	50	}
	51	argc--, argv++;
	52	if (argc > 0 && !strcmp(*argv, "-r")) {
	53	iamrecursive++;
	54	argc--, argv++;
	55	}
	56	if (argc > 0 && !strcmp(*argv, "-d")) {
	57	targetshouldbedirectory = 1;
	58	argc--, argv++;
	59	}
	60	if (argc > 0 && !strcmp(*argv, "-f")) {
	61	argc--, argv++; iamremote = 1;
	62	(void) response();
	63	(void) setuid(getuid());
	64	source(argc, argv);
65	exit(errs);
66	}
67	if (argc > 0 && !strcmp(*argv, "-t")) {
68	argc--, argv++; iamremote = 1;
69	(void) setuid(getuid());
70	sink(argc, argv);
71	exit(errs);
72	}
73	rem = -1;
74	if (argc > 2)
75	targetshouldbedirectory = 1;
76	(void) sprintf(cmd, "rcp%s%s",
77	iamrecursive ? " -r" : "", targetshouldbedirectory ? " -d" : "");
78	sigsys(SIGPIPE, lostconn);
79	targ = colon(argv[argc - 1]);
80	if (targ) {
81	*targ++ = 0;
82	tuser = rindex(argv[argc - 1], '.');
83	if (tuser) {
84	*tuser++ = 0;
85	if (!okname(tuser))
86	exit(1);
87	} else
88	tuser = pwd->pw_name;
89	for (i = 0; i < argc - 1; i++) {
90	src = colon(argv[i]);
91	if (src) {
92	*src++ = 0;
93	suser = rindex(argv[i], '.');
94	if (suser) {
95	*suser++ = 0;
96	if (!okname(suser))
97	continue;
98	(void) sprintf(buf, "rsh %s -l %s %s %s '%s:%s' </dev/null",
99	argv[i], suser, cmd,
100	src, argv[argc - 1], targ);
101	} else
102	(void) sprintf(buf, "rsh %s %s %s '%s:%s' </dev/null",
103	argv[i], cmd,
104	src, argv[argc - 1], targ);
105	(void) susystem(buf);
106	} else {
107	if (rem == -1) {
108	(void) sprintf(buf, "%s -t %s",
109	cmd, targ);
110	host = argv[argc - 1];
111	rem = rcmd(&host, IPPORT_CMDSERVER,
112	pwd->pw_name, tuser,
113	buf, 0);
114	if (rem < 0)
115	exit(1);
116	if (response() < 0)
117	exit(1);
118	}
119	source(1, argv+i);
120	}
121	}
122	} else {
123	if (targetshouldbedirectory)
124	verifydir(argv[argc - 1]);
125	for (i = 0; i < argc - 1; i++) {
126	src = colon(argv[i]);
127	if (src == 0) {
128	(void) sprintf(buf, "/bin/cp%s %s %s",
129	iamrecursive ? " -r" : "",
130	argv[i], argv[argc - 1]);
131	(void) susystem(buf);
132	} else {
133	*src++ = 0;
134	suser = rindex(argv[i], '.');
135	if (suser) {
136	*suser++ = 0;
137	if (!okname(suser))
138	continue;
139	} else
140	suser = pwd->pw_name;
141	(void) sprintf(buf, "%s -f %s", cmd, src);
142	host = argv[i];
143	rem = rcmd(&host, IPPORT_CMDSERVER,
144	pwd->pw_name, suser,
145	buf, 0);
146	if (rem < 0)
147	exit(1);
148	sink(1, argv+argc-1);
149	(void) close(rem);
150	rem = -1;
151	}
152	}
153	}
154	exit(errs);
155	}
156
157	verifydir(cp)
158	char *cp;
159	{
160	struct stat stb;
161
162	if (stat(cp, &stb) < 0)
163	goto bad;
164	if ((stb.st_mode & S_IFMT) == S_IFDIR)
165	return;
166	errno = ENOTDIR;
167	bad:
168	error("rcp: %s: %s.\n", cp, sys_errlist[errno]);
169	exit(1);
170	}
171
172	char *
173	colon(cp)
174	char *cp;
175	{
176
177	while (*cp) {
178	if (*cp == ':')
179	return (cp);
180	if (*cp == '/')
181	return (0);
182	cp++;
183	}
184	return (0);
185	}
186
187	okname(cp0)
188	char *cp0;
189	{
190	register char *cp = cp0;
191	register int c;
192
193	do {
194	c = *cp;
195	if (c & 0200)
196	goto bad;
197	if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-')
198	goto bad;
199	cp++;
200	} while (*cp);
201	return (1);
202	bad:
203	fprintf(stderr, "rcp: invalid user name %s\n", cp0);
204	return (0);
205	}
206
207	susystem(buf)
208	char *buf;
209	{
210
211	if (fork() == 0) {
212	(void) setuid(getuid());
213	(void) system(buf);
214	_exit(0);
215	} else
216	(void) wait((int *)0);
217	}
218
219	source(argc, argv)
220	int argc;
221	char **argv;
222	{
223	char last, name;
224	struct stat stb;
225	char buf[BUFSIZ];
226	int x, sizerr, f, i;
227
228	for (x = 0; x < argc; x++) {
229	name = argv[x];
230	if (access(name, 4) < 0 \|\| (f = open(name, 0)) < 0) {
231	error("rcp: %s: %s\n", name, sys_errlist[errno]);
232	continue;
233	}
234	if (fstat(f, &stb) < 0)
235	goto notreg;
236	switch (stb.st_mode&S_IFMT) {
237
238	case S_IFREG:
239	break;
240
241	case S_IFDIR:
242	if (iamrecursive) {
243	(void) close(f);
244	rsource(name, (int)stb.st_mode);
245	continue;
246	}
247	/* fall into ... */
248	default:
249	notreg:
250	(void) close(f);
251	error("rcp: %s: not a plain file\n", name);
252	continue;
253	}
254	last = rindex(name, '/');
255	if (last == 0)
256	last = name;
257	else
258	last++;
259	(void) sprintf(buf, "C%04o %d %s\n",
260	stb.st_mode&07777, stb.st_size, last);
261	(void) write(rem, buf, strlen(buf));
262	if (response() < 0) {
263	(void) close(f);
264	continue;
265	}
266	sizerr = 0;
267	for (i = 0; i < stb.st_size; i += BUFSIZ) {
268	int amt = BUFSIZ;
269	if (i + amt > stb.st_size)
270	amt = stb.st_size - i;
271	if (sizerr == 0 && read(f, buf, amt) != amt)
272	sizerr = 1;
273	(void) write(rem, buf, amt);
274	}
275	(void) close(f);
276	if (sizerr == 0)
277	ga();
278	else
279	error("rcp: %s: file changed size\n", name);
280	(void) response();
281	}
282	}
283
284	#include <ndir.h>
285
286	rsource(name, mode)
287	char *name;
288	int mode;
289	{
290	DIR *d = opendir(name);
291	char *last;
292	struct direct *dp;
293	char buf[BUFSIZ];
294	char *bufv[1];
295
296	if (d == 0) {
297	error("%s: %s\n", name, sys_errlist[errno]);
298	return;
299	}
300	last = rindex(name, '/');
301	if (last == 0)
302	last = name;
303	else
304	last++;
305	(void) sprintf(buf, "D%04o %d %s\n", mode&07777, 0, last);
306	(void) write(rem, buf, strlen(buf));
307	if (response() < 0) {
308	closedir(d);
309	return;
310	}
311	while (dp = readdir(d)) {
312	if (dp->d_ino == 0)
313	continue;
314	if (!strcmp(dp->d_name, ".") \|\| !strcmp(dp->d_name, ".."))
315	continue;
316	if (strlen(name) + 1 + strlen(dp->d_name) >= BUFSIZ - 1) {
317	error("%s/%s: Name too long.\n", name, dp->d_name);
318	continue;
319	}
320	(void) sprintf(buf, "%s/%s", name, dp->d_name);
321	bufv[0] = buf;
322	source(1, bufv);
323	}
324	closedir(d);
325	(void) write(rem, "E\n", 2);
326	(void) response();
327	}
328
329	response()
330	{
331	char resp, c, rbuf[BUFSIZ], *cp = rbuf;
332
333	if (read(rem, &resp, 1) != 1)
334	lostconn();
335	switch (resp) {
336
337	case 0:
338	return (0);
339
340	default:
341	*cp++ = resp;
342	/* fall into... */
343	case 1:
344	case 2:
345	do {
346	if (read(rem, &c, 1) != 1)
347	lostconn();
348	*cp++ = c;
349	} while (cp < &rbuf[BUFSIZ] && c != '\n');
350	if (iamremote == 0)
351	(void) write(2, rbuf, cp - rbuf);
352	errs++;
353	if (resp == 1)
354	return (-1);
355	exit(1);
356	}
357	/NOTREACHED/
358	}
359
360	lostconn()
361	{
362
363	if (iamremote == 0)
364	fprintf(stderr, "rcp: lost connection\n");
365	exit(1);
366	}
367
368	sink(argc, argv)
369	int argc;
370	char **argv;
371	{
372	char *targ;
373	char cmdbuf[BUFSIZ], nambuf[BUFSIZ], buf[BUFSIZ], *cp;
374	int of, mode, i, size, wrerr, exists;
375	char *whopp;
376	struct stat stb; int targisdir = 0;
377	#define SCREWUP(str) { whopp = str; goto screwup; }
378	int mask = umask(0);
379	char *myargv[1];
380
381	umask(mask);
382	if (argc > 1) {
383	error("rcp: ambiguous target\n");
384	exit(1);
385	}
386	targ = *argv;
387	if (targetshouldbedirectory)
388	verifydir(targ);
389	ga();
390	if (stat(targ, &stb) == 0 && (stb.st_mode & S_IFMT) == S_IFDIR)
391	targisdir = 1;
392	for (;;) {
393	cp = cmdbuf;
394	if (read(rem, cp, 1) <= 0)
395	return;
396	if (*cp++ == '\n')
397	SCREWUP("unexpected '\\n'");
398	do {
399	if (read(rem, cp, 1) != 1)
400	SCREWUP("lost connection");
401	} while (*cp++ != '\n');
402	*cp = 0;
403	if (cmdbuf[0] == '\01' \|\| cmdbuf[0] == '\02') {
404	if (iamremote == 0)
405	(void) write(2, cmdbuf, strlen(cmdbuf));
406	if (cmdbuf[0] == '\02')
407	exit(1);
408	errs++;
409	continue;
410	}
411	*--cp = 0;
412	cp = cmdbuf;
413	if (*cp == 'E') {
414	ga();
415	return;
416	}
417	if (cp != 'C' && cp != 'D')
418	SCREWUP("expected control record");
419	cp++;
420	mode = 0;
421	for (; cp < cmdbuf+5; cp++) {
422	if (cp < '0' \|\| cp > '7')
423	SCREWUP("bad mode");
424	mode = (mode << 3) \| (*cp - '0');
425	}
426	if (*cp++ != ' ')
427	SCREWUP("mode not delimited");
428	size = 0;
429	while (cp >= '0' && cp <= '9')
430	size = size * 10 + (*cp++ - '0');
431	if (*cp++ != ' ')
432	SCREWUP("size not delimited");
433	if (targisdir)
434	(void) sprintf(nambuf, "%s%s%s", targ,
435	*targ ? "/" : "", cp);
436	else
437	(void) strcpy(nambuf, targ);
438	exists = stat(nambuf, &stb) == 0;
439	if (exists && access(nambuf, 2) < 0)
440	goto bad2;
441	{ char slash = rindex(nambuf, '/'), dir;
442	if (slash == 0) {
443	slash = "/";
444	dir = ".";
445	} else {
446	*slash = 0;
447	dir = nambuf;
448	}
449	if (exists == 0 && access(dir, 2) < 0)
450	goto bad;
451	*slash = '/';
452	if (cmdbuf[0] == 'D') {
453	if (stat(nambuf, &stb) == 0) {
454	if ((stb.st_mode&S_IFMT) != S_IFDIR) {
455	errno = ENOTDIR;
456	goto bad;
457	}
458	} else if (mkdir(nambuf, mode) < 0)
459	goto bad;
460	myargv[0] = nambuf;
461	sink(1, myargv);
462	continue;
463	}
464	if ((of = creat(nambuf, mode)) < 0) {
465	bad:
466	*slash = '/';
467	bad2:
468	error("rcp: %s: %s\n", nambuf, sys_errlist[errno]);
469	continue;
470	}
471	}
472	if (exists == 0) {
473	(void) stat(nambuf, &stb);
474	(void) chown(nambuf, pwd->pw_uid, stb.st_gid);
475	(void) chmod(nambuf, mode &~ mask);
476	}
477	ga();
478	wrerr = 0;
479	for (i = 0; i < size; i += BUFSIZ) {
480	int amt = BUFSIZ;
481	char *cp = buf;
482
483	if (i + amt > size)
484	amt = size - i;
485	do {
486	int j = read(rem, cp, amt);
487
488	if (j <= 0)
489	exit(1);
490	amt -= j;
491	cp += j;
492	} while (amt > 0);
493	amt = BUFSIZ;
494	if (i + amt > size)
495	amt = size - i;
496	if (wrerr == 0 && write(of, buf, amt) != amt)
497	wrerr++;
498	}
499	(void) close(of);
500	(void) response();
501	if (wrerr)
502	error("rcp: %s: %s\n", cp, sys_errlist[errno]);
503	else
504	ga();
505	}
506	screwup:
507	error("rcp: protocol screwup: %s\n", whopp);
508	exit(1);
509	}
510
511	/VARARGS/
512	error(fmt, a1, a2, a3, a4, a5)
513	char *fmt;
514	int a1, a2, a3, a4, a5;
515	{
516	char buf[BUFSIZ], *cp = buf;
517
518	errs++;
519	*cp++ = 1;
520	(void) sprintf(cp, fmt, a1, a2, a3, a4, a5);
521	(void) write(rem, buf, strlen(buf));
522	if (iamremote == 0)
523	(void) write(2, buf+1, strlen(buf+1));
524	}
525
526	mkdir(name, mode)
527	char *name;
528	int mode;
529	{
530	char *argv[4];
531	int pid, rc;
532
533	argv[0] = "mkdir";
534	argv[1] = name;
535	argv[2] = 0;
536	pid = fork();
537	if (pid < 0) {
538	perror("cp");
539	return (1);
540	}
541	if (pid) {
542	while (wait(&rc) != pid)
543	continue;
544	if (rc == 0)
545	if (chmod(name, mode) < 0) {
546	perror(name);
547	rc = 1;
548	}
549	return (rc);
550	}
551	(void) setuid(getuid());
552	execv("/bin/mkdir", argv);
553	execv("/usr/bin/mkdir", argv);
554	perror("mkdir");
555	_exit(1);
556	/NOTREACHED/
557	}