Rework RPC code once again. By default, only enable the

stuff needed for NFS mounts, rsh, and similar.
 -Erik

1 files changed, 191 insertions, 0 deletions

diff --git a/libc/inet/rpc/rexec.c b/libc/inet/rpc/rexec.c
new file mode 100644
index 000000000..a084ccde7
--- /dev/null
+++ b/libc/inet/rpc/rexec.c
@@ -0,0 +1,191 @@
+/*
+ * Copyright (c) 1980, 1993
+ *	The 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.
+ * 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.
+ */
+
+#define __FORCE_GLIBC
+#include <features.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+
+#include <alloca.h>
+#include <stdio.h>
+#include <netdb.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define SA_LEN(_x)      __libc_sa_len((_x)->sa_family)
+extern int __libc_sa_len (sa_family_t __af) __THROW;
+
+int	rexecoptions;
+char	ahostbuf[NI_MAXHOST];
+extern int ruserpass(const char *host, const char **aname, const char **apass);
+
+int
+rexec_af(ahost, rport, name, pass, cmd, fd2p, af)
+	char **ahost;
+	int rport;
+	const char *name, *pass, *cmd;
+	int *fd2p;
+	sa_family_t af;
+{
+	struct sockaddr_storage sa2, from;
+	struct addrinfo hints, *res0;
+	const char *orig_name = name;
+	const char *orig_pass = pass;
+	u_short port = 0;
+	int s, timo = 1, s3;
+	char c;
+	int gai;
+	char servbuff[NI_MAXSERV];
+
+	snprintf(servbuff, sizeof(servbuff), "%d", ntohs(rport));
+	servbuff[sizeof(servbuff) - 1] = '\0';
+
+	memset(&hints, 0, sizeof(hints));
+	hints.ai_family = af;
+	hints.ai_socktype = SOCK_STREAM;
+	hints.ai_flags = AI_CANONNAME;
+	gai = getaddrinfo(*ahost, servbuff, &hints, &res0);
+	if (gai){
+		/* XXX: set errno? */
+		return -1;
+	}
+
+	if (res0->ai_canonname){
+		strncpy(ahostbuf, res0->ai_canonname, sizeof(ahostbuf));
+		ahostbuf[sizeof(ahostbuf)-1] = '\0';
+		*ahost = ahostbuf;
+	}
+	else{
+		*ahost = NULL;
+	}
+	ruserpass(res0->ai_canonname, &name, &pass);
+retry:
+	s = socket(res0->ai_family, res0->ai_socktype, 0);
+	if (s < 0) {
+		perror("rexec: socket");
+		return (-1);
+	}
+	if (connect(s, res0->ai_addr, res0->ai_addrlen) < 0) {
+		if (errno == ECONNREFUSED && timo <= 16) {
+			(void) close(s);
+			sleep(timo);
+			timo *= 2;
+			goto retry;
+		}
+		perror(res0->ai_canonname);
+		return (-1);
+	}
+	if (fd2p == 0) {
+		(void) write(s, "", 1);
+		port = 0;
+	} else {
+		char num[32];
+		int s2, sa2len;
+
+		s2 = socket(res0->ai_family, res0->ai_socktype, 0);
+		if (s2 < 0) {
+			(void) close(s);
+			return (-1);
+		}
+		listen(s2, 1);
+		sa2len = sizeof (sa2);
+		if (getsockname(s2, (struct sockaddr *)&sa2, &sa2len) < 0) {
+			perror("getsockname");
+			(void) close(s2);
+			goto bad;
+		} else if (sa2len != SA_LEN((struct sockaddr *)&sa2)) {
+			__set_errno(EINVAL);
+			(void) close(s2);
+			goto bad;
+		}
+		port = 0;
+		if (!getnameinfo((struct sockaddr *)&sa2, sa2len,
+				 NULL, 0, servbuff, sizeof(servbuff),
+				 NI_NUMERICSERV))
+			port = atoi(servbuff);
+		(void) sprintf(num, "%u", port);
+		(void) write(s, num, strlen(num)+1);
+		{ int len = sizeof (from);
+		  s3 = accept(s2, (struct sockaddr *)&from, &len);
+		  close(s2);
+		  if (s3 < 0) {
+			perror("accept");
+			port = 0;
+			goto bad;
+		  }
+		}
+		*fd2p = s3;
+	}
+	(void) write(s, name, strlen(name) + 1);
+	/* should public key encypt the password here */
+	(void) write(s, pass, strlen(pass) + 1);
+	(void) write(s, cmd, strlen(cmd) + 1);
+
+	/* We don't need the memory allocated for the name and the password
+	   in ruserpass anymore.  */
+	if (name != orig_name)
+	  free ((char *) name);
+	if (pass != orig_pass)
+	  free ((char *) pass);
+
+	if (read(s, &c, 1) != 1) {
+		perror(*ahost);
+		goto bad;
+	}
+	if (c != 0) {
+		while (read(s, &c, 1) == 1) {
+			(void) write(2, &c, 1);
+			if (c == '\n')
+				break;
+		}
+		goto bad;
+	}
+	freeaddrinfo(res0);
+	return (s);
+bad:
+	if (port)
+		(void) close(*fd2p);
+	(void) close(s);
+	freeaddrinfo(res0);
+	return (-1);
+}
+
+int
+rexec(ahost, rport, name, pass, cmd, fd2p)
+	char **ahost;
+	int rport;
+	const char *name, *pass, *cmd;
+	int *fd2p;
+{
+	return rexec_af(ahost, rport, name, pass, cmd, fd2p, AF_INET);
+}