]>
Commit | Line | Data |
---|---|---|
28f540f4 RM |
1 | /* |
2 | * Copyright (c) 1980, 1993 | |
3 | * The Regents of the University of California. All rights reserved. | |
4 | * | |
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. | |
28f540f4 RM |
13 | * 4. Neither the name of the University nor the names of its contributors |
14 | * may be used to endorse or promote products derived from this software | |
15 | * without specific prior written permission. | |
16 | * | |
17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
27 | * SUCH DAMAGE. | |
28 | */ | |
29 | ||
30 | #if defined(LIBC_SCCS) && !defined(lint) | |
31 | static char sccsid[] = "@(#)rexec.c 8.1 (Berkeley) 6/4/93"; | |
32 | #endif /* LIBC_SCCS and not lint */ | |
33 | ||
34 | #include <sys/types.h> | |
35 | #include <sys/socket.h> | |
36 | ||
37 | #include <netinet/in.h> | |
38 | ||
e4cf5070 | 39 | #include <alloca.h> |
28f540f4 RM |
40 | #include <stdio.h> |
41 | #include <netdb.h> | |
42 | #include <errno.h> | |
84384f5b UD |
43 | #include <string.h> |
44 | #include <unistd.h> | |
28f540f4 | 45 | |
28f540f4 | 46 | int rexecoptions; |
28f540f4 | 47 | |
84384f5b | 48 | int |
28f540f4 RM |
49 | rexec(ahost, rport, name, pass, cmd, fd2p) |
50 | char **ahost; | |
51 | int rport; | |
e7fd8a39 | 52 | const char *name, *pass, *cmd; |
28f540f4 RM |
53 | int *fd2p; |
54 | { | |
55 | struct sockaddr_in sin, sin2, from; | |
e4cf5070 UD |
56 | struct hostent hostbuf, *hp; |
57 | size_t hstbuflen; | |
58 | char *hsttmpbuf; | |
28f540f4 RM |
59 | u_short port; |
60 | int s, timo = 1, s3; | |
61 | char c; | |
e4cf5070 UD |
62 | int herr; |
63 | ||
64 | hstbuflen = 1024; | |
65 | hsttmpbuf = __alloca (hstbuflen); | |
66 | while (__gethostbyname_r (*ahost, &hostbuf, hsttmpbuf, hstbuflen, | |
1d863dc0 UD |
67 | &hp, &herr) != 0 |
68 | || hp == NULL) | |
e4cf5070 UD |
69 | if (herr != NETDB_INTERNAL || errno != ERANGE) |
70 | { | |
d38cd08c | 71 | __set_h_errno (herr); |
e4cf5070 UD |
72 | herror(*ahost); |
73 | return -1; | |
74 | } | |
75 | else | |
76 | { | |
77 | /* Enlarge the buffer. */ | |
78 | hstbuflen *= 2; | |
79 | hsttmpbuf = __alloca (hstbuflen); | |
80 | } | |
28f540f4 | 81 | |
28f540f4 RM |
82 | *ahost = hp->h_name; |
83 | ruserpass(hp->h_name, &name, &pass); | |
84 | retry: | |
50304ef0 | 85 | s = __socket(AF_INET, SOCK_STREAM, 0); |
28f540f4 RM |
86 | if (s < 0) { |
87 | perror("rexec: socket"); | |
88 | return (-1); | |
89 | } | |
90 | sin.sin_family = hp->h_addrtype; | |
91 | sin.sin_port = rport; | |
92 | bcopy(hp->h_addr, (caddr_t)&sin.sin_addr, hp->h_length); | |
50304ef0 | 93 | if (__connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) { |
28f540f4 | 94 | if (errno == ECONNREFUSED && timo <= 16) { |
50304ef0 UD |
95 | (void) __close(s); |
96 | __sleep(timo); | |
28f540f4 RM |
97 | timo *= 2; |
98 | goto retry; | |
99 | } | |
100 | perror(hp->h_name); | |
101 | return (-1); | |
102 | } | |
103 | if (fd2p == 0) { | |
50304ef0 | 104 | (void) __write(s, "", 1); |
28f540f4 RM |
105 | port = 0; |
106 | } else { | |
d68171ed | 107 | char num[32]; |
28f540f4 | 108 | int s2, sin2len; |
d68171ed | 109 | |
50304ef0 | 110 | s2 = __socket(AF_INET, SOCK_STREAM, 0); |
28f540f4 | 111 | if (s2 < 0) { |
50304ef0 | 112 | (void) __close(s); |
28f540f4 RM |
113 | return (-1); |
114 | } | |
115 | listen(s2, 1); | |
116 | sin2len = sizeof (sin2); | |
117 | if (getsockname(s2, (struct sockaddr *)&sin2, &sin2len) < 0 || | |
118 | sin2len != sizeof (sin2)) { | |
119 | perror("getsockname"); | |
50304ef0 | 120 | (void) __close(s2); |
28f540f4 RM |
121 | goto bad; |
122 | } | |
123 | port = ntohs((u_short)sin2.sin_port); | |
124 | (void) sprintf(num, "%u", port); | |
50304ef0 | 125 | (void) __write(s, num, strlen(num)+1); |
28f540f4 RM |
126 | { int len = sizeof (from); |
127 | s3 = accept(s2, (struct sockaddr *)&from, &len); | |
50304ef0 | 128 | __close(s2); |
28f540f4 RM |
129 | if (s3 < 0) { |
130 | perror("accept"); | |
131 | port = 0; | |
132 | goto bad; | |
133 | } | |
134 | } | |
135 | *fd2p = s3; | |
136 | } | |
50304ef0 | 137 | (void) __write(s, name, strlen(name) + 1); |
28f540f4 | 138 | /* should public key encypt the password here */ |
50304ef0 UD |
139 | (void) __write(s, pass, strlen(pass) + 1); |
140 | (void) __write(s, cmd, strlen(cmd) + 1); | |
141 | if (__read(s, &c, 1) != 1) { | |
28f540f4 RM |
142 | perror(*ahost); |
143 | goto bad; | |
144 | } | |
145 | if (c != 0) { | |
50304ef0 UD |
146 | while (__read(s, &c, 1) == 1) { |
147 | (void) __write(2, &c, 1); | |
28f540f4 RM |
148 | if (c == '\n') |
149 | break; | |
150 | } | |
151 | goto bad; | |
152 | } | |
153 | return (s); | |
154 | bad: | |
155 | if (port) | |
50304ef0 UD |
156 | (void) __close(*fd2p); |
157 | (void) __close(s); | |
28f540f4 RM |
158 | return (-1); |
159 | } |