entered into RCS
authorroland <roland>
Tue, 6 Nov 1990 05:33:46 +0000 (05:33 +0000)
committerroland <roland>
Tue, 6 Nov 1990 05:33:46 +0000 (05:33 +0000)
inet/rexec.c [new file with mode: 0644]

diff --git a/inet/rexec.c b/inet/rexec.c
new file mode 100644 (file)
index 0000000..a48dbb4
--- /dev/null
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 1980 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rexec.c    5.5 (Berkeley) 6/27/88";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+
+#include <stdio.h>
+#include <netdb.h>
+#include <errno.h>
+
+extern errno;
+char   *index();
+int    rexecoptions;
+char   *getpass(), *getlogin();
+
+rexec(ahost, rport, name, pass, cmd, fd2p)
+       char **ahost;
+       int rport;
+       char *name, *pass, *cmd;
+       int *fd2p;
+{
+       int s, timo = 1, s3;
+       struct sockaddr_in sin, sin2, from;
+       char c;
+       short port;
+       struct hostent *hp;
+
+       hp = gethostbyname(*ahost);
+       if (hp == 0) {
+               fprintf(stderr, "%s: unknown host\n", *ahost);
+               return (-1);
+       }
+       *ahost = hp->h_name;
+       ruserpass(hp->h_name, &name, &pass);
+retry:
+       s = socket(AF_INET, SOCK_STREAM, 0);
+       if (s < 0) {
+               perror("rexec: socket");
+               return (-1);
+       }
+       sin.sin_family = hp->h_addrtype;
+       sin.sin_port = rport;
+       bcopy(hp->h_addr, (caddr_t)&sin.sin_addr, hp->h_length);
+       if (connect(s, &sin, sizeof(sin)) < 0) {
+               if (errno == ECONNREFUSED && timo <= 16) {
+                       (void) close(s);
+                       sleep(timo);
+                       timo *= 2;
+                       goto retry;
+               }
+               perror(hp->h_name);
+               return (-1);
+       }
+       if (fd2p == 0) {
+               (void) write(s, "", 1);
+               port = 0;
+       } else {
+               char num[8];
+               int s2, sin2len;
+               
+               s2 = socket(AF_INET, SOCK_STREAM, 0);
+               if (s2 < 0) {
+                       (void) close(s);
+                       return (-1);
+               }
+               listen(s2, 1);
+               sin2len = sizeof (sin2);
+               if (getsockname(s2, (char *)&sin2, &sin2len) < 0 ||
+                 sin2len != sizeof (sin2)) {
+                       perror("getsockname");
+                       (void) close(s2);
+                       goto bad;
+               }
+               port = ntohs((u_short)sin2.sin_port);
+               (void) sprintf(num, "%d", port);
+               (void) write(s, num, strlen(num)+1);
+               { int len = sizeof (from);
+                 s3 = accept(s2, &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);
+       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;
+       }
+       return (s);
+bad:
+       if (port)
+               (void) close(*fd2p);
+       (void) close(s);
+       return (-1);
+}