Commit | Line | Data |
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8ea4199d | 1 | /* |
ca3c7745 KB |
2 | * Copyright (c) 1980, 1993 |
3 | * The Regents of the University of California. All rights reserved. | |
6b2f9dd0 | 4 | * |
ad787160 C |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
8ea4199d DF |
32 | */ |
33 | ||
2ce81398 | 34 | #if defined(LIBC_SCCS) && !defined(lint) |
ad787160 | 35 | static char sccsid[] = "@(#)rexec.c 8.1 (Berkeley) 6/4/93"; |
6b2f9dd0 | 36 | #endif /* LIBC_SCCS and not lint */ |
08081c0d | 37 | |
08081c0d KM |
38 | #include <sys/types.h> |
39 | #include <sys/socket.h> | |
40d6b022 SL |
40 | |
41 | #include <netinet/in.h> | |
42 | ||
43 | #include <stdio.h> | |
44 | #include <netdb.h> | |
95091ecc | 45 | #include <errno.h> |
08081c0d | 46 | |
95091ecc | 47 | extern errno; |
06eef7c4 | 48 | char *index(); |
95091ecc BJ |
49 | int rexecoptions; |
50 | char *getpass(), *getlogin(); | |
08081c0d | 51 | |
95091ecc BJ |
52 | rexec(ahost, rport, name, pass, cmd, fd2p) |
53 | char **ahost; | |
54 | int rport; | |
55 | char *name, *pass, *cmd; | |
56 | int *fd2p; | |
08081c0d | 57 | { |
95091ecc | 58 | struct sockaddr_in sin, sin2, from; |
40d6b022 | 59 | struct hostent *hp; |
cb1f4456 KB |
60 | u_short port; |
61 | int s, timo = 1, s3; | |
62 | char c; | |
08081c0d | 63 | |
40d6b022 SL |
64 | hp = gethostbyname(*ahost); |
65 | if (hp == 0) { | |
b2e55cea | 66 | herror(*ahost); |
08081c0d KM |
67 | return (-1); |
68 | } | |
40d6b022 SL |
69 | *ahost = hp->h_name; |
70 | ruserpass(hp->h_name, &name, &pass); | |
95091ecc | 71 | retry: |
2431680b | 72 | s = socket(AF_INET, SOCK_STREAM, 0); |
40d6b022 SL |
73 | if (s < 0) { |
74 | perror("rexec: socket"); | |
08081c0d | 75 | return (-1); |
40d6b022 SL |
76 | } |
77 | sin.sin_family = hp->h_addrtype; | |
95091ecc | 78 | sin.sin_port = rport; |
40d6b022 | 79 | bcopy(hp->h_addr, (caddr_t)&sin.sin_addr, hp->h_length); |
9782ab9b | 80 | if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) { |
95091ecc BJ |
81 | if (errno == ECONNREFUSED && timo <= 16) { |
82 | (void) close(s); | |
83 | sleep(timo); | |
84 | timo *= 2; | |
85 | goto retry; | |
86 | } | |
40d6b022 | 87 | perror(hp->h_name); |
08081c0d KM |
88 | return (-1); |
89 | } | |
95091ecc BJ |
90 | if (fd2p == 0) { |
91 | (void) write(s, "", 1); | |
92 | port = 0; | |
93 | } else { | |
94 | char num[8]; | |
6a3a3fba | 95 | int s2, sin2len; |
95091ecc | 96 | |
2431680b | 97 | s2 = socket(AF_INET, SOCK_STREAM, 0); |
95091ecc BJ |
98 | if (s2 < 0) { |
99 | (void) close(s); | |
100 | return (-1); | |
101 | } | |
40d6b022 | 102 | listen(s2, 1); |
6a3a3fba | 103 | sin2len = sizeof (sin2); |
9782ab9b | 104 | if (getsockname(s2, (struct sockaddr *)&sin2, &sin2len) < 0 || |
6a3a3fba SL |
105 | sin2len != sizeof (sin2)) { |
106 | perror("getsockname"); | |
107 | (void) close(s2); | |
108 | goto bad; | |
109 | } | |
40d6b022 | 110 | port = ntohs((u_short)sin2.sin_port); |
cb1f4456 | 111 | (void) sprintf(num, "%u", port); |
95091ecc | 112 | (void) write(s, num, strlen(num)+1); |
40d6b022 | 113 | { int len = sizeof (from); |
9782ab9b | 114 | s3 = accept(s2, (struct sockaddr *)&from, &len); |
40d6b022 SL |
115 | close(s2); |
116 | if (s3 < 0) { | |
95091ecc | 117 | perror("accept"); |
40d6b022 | 118 | port = 0; |
95091ecc | 119 | goto bad; |
40d6b022 | 120 | } |
95091ecc | 121 | } |
40d6b022 | 122 | *fd2p = s3; |
95091ecc BJ |
123 | } |
124 | (void) write(s, name, strlen(name) + 1); | |
08081c0d | 125 | /* should public key encypt the password here */ |
95091ecc BJ |
126 | (void) write(s, pass, strlen(pass) + 1); |
127 | (void) write(s, cmd, strlen(cmd) + 1); | |
128 | if (read(s, &c, 1) != 1) { | |
129 | perror(*ahost); | |
130 | goto bad; | |
131 | } | |
132 | if (c != 0) { | |
133 | while (read(s, &c, 1) == 1) { | |
134 | (void) write(2, &c, 1); | |
135 | if (c == '\n') | |
136 | break; | |
137 | } | |
138 | goto bad; | |
139 | } | |
140 | return (s); | |
141 | bad: | |
142 | if (port) | |
143 | (void) close(*fd2p); | |
144 | (void) close(s); | |
145 | return (-1); | |
08081c0d | 146 | } |