1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1989 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <sys/types.h> 30 #include <sys/socket.h> 31 32 #include <netinet/in.h> 33 34 #include <stdio.h> 35 #include <netdb.h> 36 #include <errno.h> 37 #include <strings.h> 38 #include <unistd.h> 39 40 41 char *getpass(); 42 43 int 44 rexec( 45 char **ahost, 46 unsigned short rport, 47 char *name, 48 char *pass, 49 char *cmd, 50 int *fd2p) 51 { 52 int s, timo = 1, s3; 53 struct sockaddr_in sin, sin2, from; 54 char c; 55 u_short port; 56 struct hostent *hp; 57 58 hp = gethostbyname(*ahost); 59 if (hp == 0) { 60 fprintf(stderr, "%s: unknown host\n", *ahost); 61 return (-1); 62 } 63 *ahost = hp->h_name; 64 _ruserpass(hp->h_name, &name, &pass); 65 retry: 66 s = socket(AF_INET, SOCK_STREAM, 0); 67 if (s < 0) { 68 perror("rexec: socket"); 69 return (-1); 70 } 71 sin.sin_family = hp->h_addrtype; 72 sin.sin_port = rport; 73 bcopy(hp->h_addr, (caddr_t)&sin.sin_addr, hp->h_length); 74 if (connect(s, &sin, sizeof(sin)) < 0) { 75 if (errno == ECONNREFUSED && timo <= 16) { 76 (void) close(s); 77 sleep(timo); 78 timo *= 2; 79 goto retry; 80 } 81 perror(hp->h_name); 82 (void) close(s); 83 return (-1); 84 } 85 if (fd2p == 0) { 86 (void) write(s, "", 1); 87 port = 0; 88 } else { 89 char num[8]; 90 int s2, sin2len; 91 92 s2 = socket(AF_INET, SOCK_STREAM, 0); 93 if (s2 < 0) { 94 (void) close(s); 95 return (-1); 96 } 97 listen(s2, 1); 98 sin2len = sizeof (sin2); 99 if (getsockname(s2, (char *)&sin2, &sin2len) < 0 || 100 sin2len != sizeof (sin2)) { 101 perror("getsockname"); 102 (void) close(s2); 103 goto bad; 104 } 105 port = ntohs((u_short)sin2.sin_port); 106 (void) sprintf(num, "%u", port); 107 (void) write(s, num, strlen(num)+1); 108 { int len = sizeof (from); 109 s3 = accept(s2, &from, &len); 110 close(s2); 111 if (s3 < 0) { 112 perror("accept"); 113 port = 0; 114 goto bad; 115 } 116 } 117 *fd2p = s3; 118 } 119 (void) write(s, name, strlen(name) + 1); 120 /* should public key encypt the password here */ 121 (void) write(s, pass, strlen(pass) + 1); 122 (void) write(s, cmd, strlen(cmd) + 1); 123 if (read(s, &c, 1) != 1) { 124 perror(*ahost); 125 goto bad; 126 } 127 if (c != 0) { 128 while (read(s, &c, 1) == 1) { 129 (void) write(2, &c, 1); 130 if (c == '\n') 131 break; 132 } 133 goto bad; 134 } 135 return (s); 136 bad: 137 if (port) 138 (void) close(*fd2p); 139 (void) close(s); 140 return (-1); 141 } 142