summaryrefslogtreecommitdiff
path: root/libc/inet/rpc/rexec.c
diff options
context:
space:
mode:
Diffstat (limited to 'libc/inet/rpc/rexec.c')
-rw-r--r--libc/inet/rpc/rexec.c191
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);
+}