1 /* 2 * Copyright (c) 2001,2002 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 1.29 2002/04/02 17:37:48 markus Exp $"); 28 29 /* XXX: short-form remote directory listings (like 'ls -C') */ 30 31 #include "buffer.h" 32 #include "xmalloc.h" 33 #include "log.h" 34 #include "pathnames.h" 35 #include "misc.h" 36 37 #include "sftp.h" 38 #include "sftp-common.h" 39 #include "sftp-client.h" 40 #include "sftp-int.h" 41 42 FILE* infile; 43 size_t copy_buffer_len = 32768; 44 size_t num_requests = 16; 45 46 static void 47 connect_to_server(char *path, char **args, int *in, int *out, pid_t *sshpid) 48 { 49 int c_in, c_out; 50 #ifdef USE_PIPES 51 int pin[2], pout[2]; 52 if ((pipe(pin) == -1) || (pipe(pout) == -1)) 53 fatal("pipe: %s", strerror(errno)); 54 *in = pin[0]; 55 *out = pout[1]; 56 c_in = pout[0]; 57 c_out = pin[1]; 58 #else /* USE_PIPES */ 59 int inout[2]; 60 if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) == -1) 61 fatal("socketpair: %s", strerror(errno)); 62 *in = *out = inout[0]; 63 c_in = c_out = inout[1]; 64 #endif /* USE_PIPES */ 65 66 if ((*sshpid = fork()) == -1) 67 fatal("fork: %s", strerror(errno)); 68 else if (*sshpid == 0) { 69 if ((dup2(c_in, STDIN_FILENO) == -1) || 70 (dup2(c_out, STDOUT_FILENO) == -1)) { 71 fprintf(stderr, "dup2: %s\n", strerror(errno)); 72 exit(1); 73 } 74 close(*in); 75 close(*out); 76 close(c_in); 77 close(c_out); 78 execv(path, args); 79 fprintf(stderr, "exec: %s: %s\n", path, strerror(errno)); 80 exit(1); 81 } 82 83 close(c_in); 84 close(c_out); 85 } 86 87 static void 88 usage(void) 89 { 90 extern char *__progname; 91 92 fprintf(stderr, 93 "usage: %s [-vC1] [-b batchfile] [-o option] [-s subsystem|path] [-B buffer_size]\n" 94 " [-F config] [-P direct server path] [-S program]\n" 95 " [user@]host[:file [file]]\n", __progname); 96 exit(1); 97 } 98 99 int 100 main(int argc, char **argv) 101 { 102 int in, out, ch; 103 pid_t sshpid; 104 char *host, *userhost, *cp, *file2; 105 int debug_level = 0, sshver = 2; 106 char *file1 = NULL, *sftp_server = NULL; 107 char *ssh_program = _PATH_SSH_PROGRAM, *sftp_direct = NULL; 108 LogLevel ll = SYSLOG_LEVEL_INFO; 109 arglist args; 110 extern int optind; 111 extern char *optarg; 112 113 args.list = NULL; 114 addargs(&args, "ssh"); /* overwritten with ssh_program */ 115 addargs(&args, "-oFallBackToRsh no"); 116 addargs(&args, "-oForwardX11 no"); 117 addargs(&args, "-oForwardAgent no"); 118 addargs(&args, "-oClearAllForwardings yes"); 119 ll = SYSLOG_LEVEL_INFO; 120 infile = stdin; /* Read from STDIN unless changed by -b */ 121 122 while ((ch = getopt(argc, argv, "1hvCo:s:S:b:B:F:P:R:")) != -1) { 123 switch (ch) { 124 case 'C': 125 addargs(&args, "-C"); 126 break; 127 case 'v': 128 if (debug_level < 3) { 129 addargs(&args, "-v"); 130 ll = SYSLOG_LEVEL_DEBUG1 + debug_level; 131 } 132 debug_level++; 133 break; 134 case 'F': 135 case 'o': 136 addargs(&args, "-%c%s", ch, optarg); 137 break; 138 case '1': 139 sshver = 1; 140 if (sftp_server == NULL) 141 sftp_server = _PATH_SFTP_SERVER; 142 break; 143 case 's': 144 sftp_server = optarg; 145 break; 146 case 'S': 147 ssh_program = optarg; 148 break; 149 case 'b': 150 if (infile == stdin) { 151 infile = fopen(optarg, "r"); 152 if (infile == NULL) 153 fatal("%s (%s).", strerror(errno), optarg); 154 } else 155 fatal("Filename already specified."); 156 break; 157 case 'P': 158 sftp_direct = optarg; 159 break; 160 case 'B': 161 copy_buffer_len = strtol(optarg, &cp, 10); 162 if (copy_buffer_len == 0 || *cp != '\0') 163 fatal("Invalid buffer size \"%s\"", optarg); 164 break; 165 case 'R': 166 num_requests = strtol(optarg, &cp, 10); 167 if (num_requests == 0 || *cp != '\0') 168 fatal("Invalid number of requests \"%s\"", 169 optarg); 170 break; 171 case 'h': 172 default: 173 usage(); 174 } 175 } 176 177 log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1); 178 179 if (sftp_direct == NULL) { 180 if (optind == argc || argc > (optind + 2)) 181 usage(); 182 183 userhost = xstrdup(argv[optind]); 184 file2 = argv[optind+1]; 185 186 if ((cp = colon(userhost)) != NULL) { 187 *cp++ = '\0'; 188 file1 = cp; 189 } 190 191 if ((host = strchr(userhost, '@')) == NULL) 192 host = userhost; 193 else { 194 *host++ = '\0'; 195 if (!userhost[0]) { 196 fprintf(stderr, "Missing username\n"); 197 usage(); 198 } 199 addargs(&args, "-l%s",userhost); 200 } 201 202 host = cleanhostname(host); 203 if (!*host) { 204 fprintf(stderr, "Missing hostname\n"); 205 usage(); 206 } 207 208 addargs(&args, "-oProtocol %d", sshver); 209 210 /* no subsystem if the server-spec contains a '/' */ 211 if (sftp_server == NULL || strchr(sftp_server, '/') == NULL) 212 addargs(&args, "-s"); 213 214 addargs(&args, "%s", host); 215 addargs(&args, "%s", (sftp_server != NULL ? 216 sftp_server : "sftp")); 217 args.list[0] = ssh_program; 218 219 fprintf(stderr, "Connecting to %s...\n", host); 220 connect_to_server(ssh_program, args.list, &in, &out, 221 &sshpid); 222 } else { 223 args.list = NULL; 224 addargs(&args, "sftp-server"); 225 226 fprintf(stderr, "Attaching to %s...\n", sftp_direct); 227 connect_to_server(sftp_direct, args.list, &in, &out, 228 &sshpid); 229 } 230 231 interactive_loop(in, out, file1, file2); 232 233 close(in); 234 close(out); 235 if (infile != stdin) 236 fclose(infile); 237 238 while (waitpid(sshpid, NULL, 0) == -1) 239 if (errno != EINTR) 240 fatal("Couldn't wait for ssh process: %s", 241 strerror(errno)); 242 243 exit(0); 244 } 245