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61e96248 | 1 | /* |
2 | * Copyright (c) 2001 Damien Miller. All rights reserved. | |
3 | * | |
4 | * Redistribution and use in source and binary forms, with or without | |
5 | * modification, are permitted provided that the following conditions | |
6 | * are met: | |
7 | * 1. Redistributions of source code must retain the above copyright | |
8 | * notice, this list of conditions and the following disclaimer. | |
9 | * 2. Redistributions in binary form must reproduce the above copyright | |
10 | * notice, this list of conditions and the following disclaimer in the | |
11 | * documentation and/or other materials provided with the distribution. | |
12 | * | |
13 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
15 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
16 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
17 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
18 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
19 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
20 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
21 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
22 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
23 | */ | |
24 | ||
25 | #include "includes.h" | |
26 | ||
27 | RCSID("$OpenBSD: sftp.c,v 1.1 2001/02/04 11:11:54 djm Exp $"); | |
28 | ||
29 | /* XXX: commandline mode */ | |
30 | /* XXX: copy between two remote hosts (commandline) */ | |
31 | /* XXX: short-form remote directory listings (like 'ls -C') */ | |
32 | ||
33 | #include "buffer.h" | |
34 | #include "xmalloc.h" | |
35 | #include "log.h" | |
36 | #include "pathnames.h" | |
37 | ||
38 | #include "sftp.h" | |
39 | #include "sftp-common.h" | |
40 | #include "sftp-client.h" | |
41 | #include "sftp-int.h" | |
42 | ||
43 | void | |
44 | connect_to_server(char **args, int *in, int *out, pid_t *sshpid) | |
45 | { | |
46 | int c_in, c_out; | |
47 | #ifdef USE_PIPES | |
48 | int pin[2], pout[2]; | |
49 | if ((pipe(pin) == -1) || (pipe(pout) == -1)) | |
50 | fatal("pipe: %s", strerror(errno)); | |
51 | *in = pin[0]; | |
52 | *out = pout[1]; | |
53 | c_in = pout[0]; | |
54 | c_out = pin[1]; | |
55 | #else /* USE_PIPES */ | |
56 | int inout[2]; | |
57 | if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) == -1) | |
58 | fatal("socketpair: %s", strerror(errno)); | |
59 | *in = *out = inout[0]; | |
60 | c_in = c_out = inout[1]; | |
61 | #endif /* USE_PIPES */ | |
62 | ||
63 | if ((*sshpid = fork()) == -1) | |
64 | fatal("fork: %s", strerror(errno)); | |
65 | else if (*sshpid == 0) { | |
66 | if ((dup2(c_in, STDIN_FILENO) == -1) || | |
67 | (dup2(c_out, STDOUT_FILENO) == -1)) { | |
68 | fprintf(stderr, "dup2: %s\n", strerror(errno)); | |
69 | exit(1); | |
70 | } | |
71 | close(*in); | |
72 | close(*out); | |
73 | close(c_in); | |
74 | close(c_out); | |
75 | execv(_PATH_SSH_PROGRAM, args); | |
76 | fprintf(stderr, "exec: %s", strerror(errno)); | |
77 | exit(1); | |
78 | } | |
79 | ||
80 | close(c_in); | |
81 | close(c_out); | |
82 | } | |
83 | ||
84 | char ** | |
85 | make_ssh_args(char *add_arg) | |
86 | { | |
87 | static char **args = NULL; | |
88 | static int nargs = 0; | |
89 | char debug_buf[4096]; | |
90 | int i; | |
91 | ||
92 | /* Init args array */ | |
93 | if (args == NULL) { | |
94 | nargs = 4; | |
95 | i = 0; | |
96 | args = xmalloc(sizeof(*args) * nargs); | |
97 | args[i++] = "ssh"; | |
98 | args[i++] = "-oProtocol=2"; | |
99 | args[i++] = "-s"; | |
100 | args[i++] = NULL; | |
101 | } | |
102 | ||
103 | /* If asked to add args, then do so and return */ | |
104 | if (add_arg) { | |
105 | i = nargs++ - 1; | |
106 | args = xrealloc(args, sizeof(*args) * nargs); | |
107 | args[i++] = add_arg; | |
108 | args[i++] = NULL; | |
109 | return(NULL); | |
110 | } | |
111 | ||
112 | /* Otherwise finish up and return the arg array */ | |
113 | make_ssh_args("sftp"); | |
114 | ||
115 | /* XXX: overflow - doesn't grow debug_buf */ | |
116 | debug_buf[0] = '\0'; | |
117 | for(i = 0; args[i]; i++) { | |
118 | if (i) | |
119 | strlcat(debug_buf, " ", sizeof(debug_buf)); | |
120 | ||
121 | strlcat(debug_buf, args[i], sizeof(debug_buf)); | |
122 | } | |
123 | debug("SSH args \"%s\"", debug_buf); | |
124 | ||
125 | return(args); | |
126 | } | |
127 | ||
128 | void | |
129 | usage(void) | |
130 | { | |
131 | fprintf(stderr, "usage: sftp [-vC] [-osshopt=value] [user@]host\n"); | |
132 | exit(1); | |
133 | } | |
134 | ||
135 | int | |
136 | main(int argc, char **argv) | |
137 | { | |
138 | int in, out, i, debug_level, compress_flag; | |
139 | pid_t sshpid; | |
140 | char *cp; | |
141 | LogLevel ll; | |
142 | ||
143 | debug_level = compress_flag = 0; | |
144 | for(i = 1; i < argc && argv[i][0] == '-'; i++) { | |
145 | if (!strcmp(argv[i], "-v")) | |
146 | debug_level = MIN(3, debug_level + 1); | |
147 | else if (!strcmp(argv[i], "-C")) | |
148 | compress_flag = 1; | |
149 | else if (!strncmp(argv[i], "-o", 2)) { | |
150 | make_ssh_args(argv[i]); | |
151 | } else { | |
152 | fprintf(stderr, "Unknown option \"%s\"\n", argv[i]); | |
153 | usage(); | |
154 | } | |
155 | } | |
156 | ||
157 | if (i == argc || argc > (i + 1)) | |
158 | usage(); | |
159 | ||
160 | if ((cp = strchr(argv[i], '@')) == NULL) | |
161 | cp = argv[i]; | |
162 | else { | |
163 | *cp = '\0'; | |
164 | if (!argv[i][0]) { | |
165 | fprintf(stderr, "Missing username\n"); | |
166 | usage(); | |
167 | } | |
168 | make_ssh_args("-l"); | |
169 | make_ssh_args(argv[i]); | |
170 | cp++; | |
171 | } | |
172 | ||
173 | if (!*cp) { | |
174 | fprintf(stderr, "Missing hostname\n"); | |
175 | usage(); | |
176 | } | |
177 | ||
178 | /* Set up logging and debug '-d' arguments to ssh */ | |
179 | ll = SYSLOG_LEVEL_INFO; | |
180 | switch (debug_level) { | |
181 | case 1: | |
182 | ll = SYSLOG_LEVEL_DEBUG1; | |
183 | make_ssh_args("-v"); | |
184 | break; | |
185 | case 2: | |
186 | ll = SYSLOG_LEVEL_DEBUG2; | |
187 | make_ssh_args("-v"); | |
188 | make_ssh_args("-v"); | |
189 | break; | |
190 | case 3: | |
191 | ll = SYSLOG_LEVEL_DEBUG3; | |
192 | make_ssh_args("-v"); | |
193 | make_ssh_args("-v"); | |
194 | make_ssh_args("-v"); | |
195 | break; | |
196 | } | |
197 | ||
198 | if (compress_flag) | |
199 | make_ssh_args("-C"); | |
200 | ||
201 | log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1); | |
202 | ||
203 | make_ssh_args(cp); | |
204 | ||
205 | fprintf(stderr, "Connecting to %s...\n", cp); | |
206 | ||
207 | connect_to_server(make_ssh_args(NULL), &in, &out, &sshpid); | |
208 | ||
209 | do_init(in, out); | |
210 | ||
211 | interactive_loop(in, out); | |
212 | ||
213 | close(in); | |
214 | close(out); | |
215 | ||
216 | if (kill(sshpid, SIGHUP) == -1) | |
217 | fatal("Couldn't terminate ssh process: %s", strerror(errno)); | |
218 | ||
219 | /* XXX: wait? */ | |
220 | ||
221 | exit(0); | |
222 | } |