Updated to fedora-glibc-20040925T0738
[glibc.git] / inet / rexec.c
blob3c14836aa2c7427647d6a4076b5cc8e3f6ec32d5
1 /*
2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
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 * 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.
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.
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 */
34 #include <sys/types.h>
35 #include <sys/socket.h>
37 #include <netinet/in.h>
39 #include <alloca.h>
40 #include <stdio.h>
41 #include <netdb.h>
42 #include <errno.h>
43 #include <stdlib.h>
44 #include <string.h>
45 #include <unistd.h>
46 #include <sys/uio.h>
48 int rexecoptions;
49 libc_freeres_ptr (static char *ahostbuf);
51 int
52 rexec_af(ahost, rport, name, pass, cmd, fd2p, af)
53 char **ahost;
54 int rport;
55 const char *name, *pass, *cmd;
56 int *fd2p;
57 sa_family_t af;
59 struct sockaddr_storage sa2, from;
60 struct addrinfo hints, *res0;
61 const char *orig_name = name;
62 const char *orig_pass = pass;
63 u_short port = 0;
64 int s, timo = 1, s3;
65 char c;
66 int gai;
67 char servbuff[NI_MAXSERV];
69 __snprintf(servbuff, sizeof(servbuff), "%d", ntohs(rport));
70 servbuff[sizeof(servbuff) - 1] = '\0';
72 memset(&hints, '\0', sizeof(hints));
73 hints.ai_family = af;
74 hints.ai_socktype = SOCK_STREAM;
75 hints.ai_flags = AI_CANONNAME;
76 gai = getaddrinfo(*ahost, servbuff, &hints, &res0);
77 if (gai){
78 /* XXX: set errno? */
79 return -1;
82 if (res0->ai_canonname){
83 free (ahostbuf);
84 ahostbuf = strdup (res0->ai_canonname);
85 if (ahostbuf == NULL) {
86 perror ("rexec: strdup");
87 return (-1);
89 *ahost = ahostbuf;
90 } else
91 *ahost = NULL;
92 ruserpass(res0->ai_canonname, &name, &pass);
93 retry:
94 s = __socket(res0->ai_family, res0->ai_socktype, 0);
95 if (s < 0) {
96 perror("rexec: socket");
97 return (-1);
99 if (__connect(s, res0->ai_addr, res0->ai_addrlen) < 0) {
100 if (errno == ECONNREFUSED && timo <= 16) {
101 (void) __close(s);
102 __sleep(timo);
103 timo *= 2;
104 goto retry;
106 perror(res0->ai_canonname);
107 return (-1);
109 if (fd2p == 0) {
110 (void) __write(s, "", 1);
111 port = 0;
112 } else {
113 char num[32];
114 int s2, sa2len;
116 s2 = __socket(res0->ai_family, res0->ai_socktype, 0);
117 if (s2 < 0) {
118 (void) __close(s);
119 return (-1);
121 __listen(s2, 1);
122 sa2len = sizeof (sa2);
123 if (__getsockname(s2, (struct sockaddr *)&sa2, &sa2len) < 0) {
124 perror("getsockname");
125 (void) __close(s2);
126 goto bad;
127 } else if (sa2len != SA_LEN((struct sockaddr *)&sa2)) {
128 __set_errno(EINVAL);
129 (void) __close(s2);
130 goto bad;
132 port = 0;
133 if (!getnameinfo((struct sockaddr *)&sa2, sa2len,
134 NULL, 0, servbuff, sizeof(servbuff),
135 NI_NUMERICSERV))
136 port = atoi(servbuff);
137 (void) sprintf(num, "%u", port);
138 (void) __write(s, num, strlen(num)+1);
139 { int len = sizeof (from);
140 s3 = TEMP_FAILURE_RETRY (accept(s2, (struct sockaddr *)&from,
141 &len));
142 __close(s2);
143 if (s3 < 0) {
144 perror("accept");
145 port = 0;
146 goto bad;
149 *fd2p = s3;
152 struct iovec iov[3] =
154 [0] = { .iov_base = (void *) name, .iov_len = strlen (name) + 1 },
155 /* should public key encypt the password here */
156 [1] = { .iov_base = (void *) pass, .iov_len = strlen (pass) + 1 },
157 [2] = { .iov_base = (void *) cmd, .iov_len = strlen (cmd) + 1 }
159 (void) TEMP_FAILURE_RETRY (__writev (s, iov, 3));
161 /* We don't need the memory allocated for the name and the password
162 in ruserpass anymore. */
163 if (name != orig_name)
164 free ((char *) name);
165 if (pass != orig_pass)
166 free ((char *) pass);
168 if (__read(s, &c, 1) != 1) {
169 perror(*ahost);
170 goto bad;
172 if (c != 0) {
173 while (__read(s, &c, 1) == 1) {
174 (void) __write(2, &c, 1);
175 if (c == '\n')
176 break;
178 goto bad;
180 freeaddrinfo(res0);
181 return (s);
182 bad:
183 if (port)
184 (void) __close(*fd2p);
185 (void) __close(s);
186 freeaddrinfo(res0);
187 return (-1);
189 libc_hidden_def (rexec_af)
192 rexec(ahost, rport, name, pass, cmd, fd2p)
193 char **ahost;
194 int rport;
195 const char *name, *pass, *cmd;
196 int *fd2p;
198 return rexec_af(ahost, rport, name, pass, cmd, fd2p, AF_INET);