release/1.0.0_cvs

1 files changed, 351 insertions, 0 deletions

diff --git a/lib/libc/net/rcmd.c b/lib/libc/net/rcmd.c
new file mode 100644
index 000000000000..d0cd18000ba9
--- /dev/null
+++ b/lib/libc/net/rcmd.c
@@ -0,0 +1,351 @@
+/*
+ * Copyright (c) 1983 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rcmd.c	5.24 (Berkeley) 2/24/91";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <netdb.h>
+#include <pwd.h>
+#include <errno.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <string.h>
+
+rcmd(ahost, rport, locuser, remuser, cmd, fd2p)
+	char **ahost;
+	u_short rport;
+	const char *locuser, *remuser, *cmd;
+	int *fd2p;
+{
+	int s, timo = 1, pid;
+	long oldmask;
+	struct sockaddr_in sin, sin2, from;
+	char c;
+	int lport = IPPORT_RESERVED - 1;
+	struct hostent *hp;
+	fd_set reads;
+
+	pid = getpid();
+	hp = gethostbyname(*ahost);
+	if (hp == 0) {
+		herror(*ahost);
+		return (-1);
+	}
+	*ahost = hp->h_name;
+	oldmask = sigblock(sigmask(SIGURG));
+	for (;;) {
+		s = rresvport(&lport);
+		if (s < 0) {
+			if (errno == EAGAIN)
+				fprintf(stderr, "socket: All ports in use\n");
+			else
+				perror("rcmd: socket");
+			sigsetmask(oldmask);
+			return (-1);
+		}
+		fcntl(s, F_SETOWN, pid);
+		sin.sin_family = hp->h_addrtype;
+		bcopy(hp->h_addr_list[0], (caddr_t)&sin.sin_addr, hp->h_length);
+		sin.sin_port = rport;
+		if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) >= 0)
+			break;
+		(void) close(s);
+		if (errno == EADDRINUSE) {
+			lport--;
+			continue;
+		}
+		if (errno == ECONNREFUSED && timo <= 16) {
+			sleep(timo);
+			timo *= 2;
+			continue;
+		}
+		if (hp->h_addr_list[1] != NULL) {
+			int oerrno = errno;
+
+			fprintf(stderr,
+			    "connect to address %s: ", inet_ntoa(sin.sin_addr));
+			errno = oerrno;
+			perror(0);
+			hp->h_addr_list++;
+			bcopy(hp->h_addr_list[0], (caddr_t)&sin.sin_addr,
+			    hp->h_length);
+			fprintf(stderr, "Trying %s...\n",
+				inet_ntoa(sin.sin_addr));
+			continue;
+		}
+		perror(hp->h_name);
+		sigsetmask(oldmask);
+		return (-1);
+	}
+	lport--;
+	if (fd2p == 0) {
+		write(s, "", 1);
+		lport = 0;
+	} else {
+		char num[8];
+		int s2 = rresvport(&lport), s3;
+		int len = sizeof (from);
+
+		if (s2 < 0)
+			goto bad;
+		listen(s2, 1);
+		(void) sprintf(num, "%d", lport);
+		if (write(s, num, strlen(num)+1) != strlen(num)+1) {
+			perror("write: setting up stderr");
+			(void) close(s2);
+			goto bad;
+		}
+		FD_ZERO(&reads);
+		FD_SET(s, &reads);
+		FD_SET(s2, &reads);
+		errno = 0;
+		if (select(32, &reads, 0, 0, 0) < 1 ||
+		    !FD_ISSET(s2, &reads)) {
+			if (errno != 0)
+				perror("select: setting up stderr");
+			else
+			    fprintf(stderr,
+				"select: protocol failure in circuit setup.\n");
+			(void) close(s2);
+			goto bad;
+		}
+		s3 = accept(s2, (struct sockaddr *)&from, &len);
+		(void) close(s2);
+		if (s3 < 0) {
+			perror("accept");
+			lport = 0;
+			goto bad;
+		}
+		*fd2p = s3;
+		from.sin_port = ntohs((u_short)from.sin_port);
+		if (from.sin_family != AF_INET ||
+		    from.sin_port >= IPPORT_RESERVED ||
+		    from.sin_port < IPPORT_RESERVED / 2) {
+			fprintf(stderr,
+			    "socket: protocol failure in circuit setup.\n");
+			goto bad2;
+		}
+	}
+	(void) write(s, locuser, strlen(locuser)+1);
+	(void) write(s, remuser, strlen(remuser)+1);
+	(void) write(s, cmd, strlen(cmd)+1);
+	if (read(s, &c, 1) != 1) {
+		perror(*ahost);
+		goto bad2;
+	}
+	if (c != 0) {
+		while (read(s, &c, 1) == 1) {
+			(void) write(2, &c, 1);
+			if (c == '\n')
+				break;
+		}
+		goto bad2;
+	}
+	sigsetmask(oldmask);
+	return (s);
+bad2:
+	if (lport)
+		(void) close(*fd2p);
+bad:
+	(void) close(s);
+	sigsetmask(oldmask);
+	return (-1);
+}
+
+rresvport(alport)
+	int *alport;
+{
+	struct sockaddr_in sin;
+	int s;
+
+	sin.sin_family = AF_INET;
+	sin.sin_addr.s_addr = INADDR_ANY;
+	s = socket(AF_INET, SOCK_STREAM, 0);
+	if (s < 0)
+		return (-1);
+	for (;;) {
+		sin.sin_port = htons((u_short)*alport);
+		if (bind(s, (struct sockaddr *)&sin, sizeof (sin)) >= 0)
+			return (s);
+		if (errno != EADDRINUSE) {
+			(void) close(s);
+			return (-1);
+		}
+		(*alport)--;
+		if (*alport == IPPORT_RESERVED/2) {
+			(void) close(s);
+			errno = EAGAIN;		/* close */
+			return (-1);
+		}
+	}
+}
+
+int	_check_rhosts_file = 1;
+
+ruserok(rhost, superuser, ruser, luser)
+	const char *rhost, *ruser, *luser;
+	int superuser;
+{
+	FILE *hostf;
+	char fhost[MAXHOSTNAMELEN];
+	int first = 1;
+	register char *sp, *p;
+	int baselen = -1;
+
+	sp = (char *)rhost;
+	p = fhost;
+	while (*sp) {
+		if (*sp == '.') {
+			if (baselen == -1)
+				baselen = sp - rhost;
+			*p++ = *sp++;
+		} else {
+			*p++ = isupper(*sp) ? tolower(*sp++) : *sp++;
+		}
+	}
+	*p = '\0';
+	hostf = superuser ? (FILE *)0 : fopen(_PATH_HEQUIV, "r");
+again:
+	if (hostf) {
+		if (!_validuser(hostf, fhost, luser, ruser, baselen)) {
+			(void) fclose(hostf);
+			return(0);
+		}
+		(void) fclose(hostf);
+	}
+	if (first == 1 && (_check_rhosts_file || superuser)) {
+		struct stat sbuf;
+		struct passwd *pwd;
+		char pbuf[MAXPATHLEN];
+
+		first = 0;
+		if ((pwd = getpwnam(luser)) == NULL)
+			return(-1);
+		(void)strcpy(pbuf, pwd->pw_dir);
+		(void)strcat(pbuf, "/.rhosts");
+		if ((hostf = fopen(pbuf, "r")) == NULL)
+			return(-1);
+		/*
+		 * if owned by someone other than user or root or if
+		 * writeable by anyone but the owner, quit
+		 */
+		if (fstat(fileno(hostf), &sbuf) ||
+		    sbuf.st_uid && sbuf.st_uid != pwd->pw_uid ||
+		    sbuf.st_mode&022) {
+			fclose(hostf);
+			return(-1);
+		}
+		goto again;
+	}
+	return (-1);
+}
+
+/* don't make static, used by lpd(8) */
+_validuser(hostf, rhost, luser, ruser, baselen)
+	char *rhost, *luser, *ruser;
+	FILE *hostf;
+	int baselen;
+{
+	register char *p;
+	char *user, ahost[MAXHOSTNAMELEN];
+	static int _checkhost();
+
+	while (fgets(ahost, sizeof (ahost), hostf)) {
+		p = ahost;
+		while (*p != '\n' && *p != ' ' && *p != '\t' && *p != '\0') {
+			*p = isupper(*p) ? tolower(*p) : *p;
+			p++;
+		}
+		if (*p == ' ' || *p == '\t') {
+			*p++ = '\0';
+			while (*p == ' ' || *p == '\t')
+				p++;
+			user = p;
+			while (*p != '\n' && *p != ' ' && *p != '\t' && *p != '\0')
+				p++;
+		} else
+			user = p;
+		*p = '\0';
+		if (_checkhost(rhost, ahost, baselen) &&
+		    !strcmp(ruser, *user ? user : luser)) {
+			return (0);
+		}
+	}
+	return (-1);
+}
+
+static
+_checkhost(rhost, lhost, len)
+	char *rhost, *lhost;
+	int len;
+{
+	static char ldomain[MAXHOSTNAMELEN + 1];
+	static char *domainp = NULL;
+	static int nodomain = 0;
+	register char *cp;
+
+	if (len == -1)
+		return(!strcmp(rhost, lhost));
+	if (strncmp(rhost, lhost, len))
+		return(0);
+	if (!strcmp(rhost, lhost))
+		return(1);
+	if (*(lhost + len) != '\0')
+		return(0);
+	if (nodomain)
+		return(0);
+	if (!domainp) {
+		if (gethostname(ldomain, sizeof(ldomain)) == -1) {
+			nodomain = 1;
+			return(0);
+		}
+		ldomain[MAXHOSTNAMELEN] = NULL;
+		if ((domainp = index(ldomain, '.')) == (char *)NULL) {
+			nodomain = 1;
+			return(0);
+		}
+		for (cp = ++domainp; *cp; ++cp)
+			if (isupper(*cp))
+				*cp = tolower(*cp);
+	}
+	return(!strcmp(domainp, rhost + len +1));
+}