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 1.37 2003/07/10 20:05:55 markus Exp $"); 28 29 #include "buffer.h" 30 #include "xmalloc.h" 31 #include "log.h" 32 #include "pathnames.h" 33 #include "misc.h" 34 35 #include "sftp.h" 36 #include "sftp-common.h" 37 #include "sftp-client.h" 38 #include "sftp-int.h" 39 40 FILE* infile; 41 size_t copy_buffer_len = 32768; 42 size_t num_requests = 16; 43 static pid_t sshpid = -1; 44 45 extern int showprogress; 46 47 static void 48 killchild(int signo) 49 { 50 if (sshpid > 1) 51 kill(sshpid, signo); 52 53 _exit(1); 54 } 55 56 static void 57 connect_to_server(char *path, char **args, int *in, int *out) 58 { 59 int c_in, c_out; 60 61 #ifdef USE_PIPES 62 int pin[2], pout[2]; 63 64 if ((pipe(pin) == -1) || (pipe(pout) == -1)) 65 fatal("pipe: %s", strerror(errno)); 66 *in = pin[0]; 67 *out = pout[1]; 68 c_in = pout[0]; 69 c_out = pin[1]; 70 #else /* USE_PIPES */ 71 int inout[2]; 72 73 if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) == -1) 74 fatal("socketpair: %s", strerror(errno)); 75 *in = *out = inout[0]; 76 c_in = c_out = inout[1]; 77 #endif /* USE_PIPES */ 78 79 if ((sshpid = fork()) == -1) 80 fatal("fork: %s", strerror(errno)); 81 else if (sshpid == 0) { 82 if ((dup2(c_in, STDIN_FILENO) == -1) || 83 (dup2(c_out, STDOUT_FILENO) == -1)) { 84 fprintf(stderr, "dup2: %s\n", strerror(errno)); 85 exit(1); 86 } 87 close(*in); 88 close(*out); 89 close(c_in); 90 close(c_out); 91 execv(path, args); 92 fprintf(stderr, "exec: %s: %s\n", path, strerror(errno)); 93 exit(1); 94 } 95 96 signal(SIGTERM, killchild); 97 signal(SIGINT, killchild); 98 signal(SIGHUP, killchild); 99 close(c_in); 100 close(c_out); 101 } 102 103 static void 104 usage(void) 105 { 106 extern char *__progname; 107 108 fprintf(stderr, 109 "usage: %s [-vC1] [-b batchfile] [-o ssh_option] [-s subsystem | sftp_server]\n" 110 " [-B buffer_size] [-F ssh_config] [-P sftp_server path]\n" 111 " [-R num_requests] [-S program]\n" 112 " [user@]host[:file [file]]\n", __progname); 113 exit(1); 114 } 115 116 int 117 main(int argc, char **argv) 118 { 119 int in, out, ch, err; 120 char *host, *userhost, *cp, *file2; 121 int debug_level = 0, sshver = 2; 122 char *file1 = NULL, *sftp_server = NULL; 123 char *ssh_program = _PATH_SSH_PROGRAM, *sftp_direct = NULL; 124 LogLevel ll = SYSLOG_LEVEL_INFO; 125 arglist args; 126 extern int optind; 127 extern char *optarg; 128 129 args.list = NULL; 130 addargs(&args, "ssh"); /* overwritten with ssh_program */ 131 addargs(&args, "-oForwardX11 no"); 132 addargs(&args, "-oForwardAgent no"); 133 addargs(&args, "-oClearAllForwardings yes"); 134 ll = SYSLOG_LEVEL_INFO; 135 infile = stdin; /* Read from STDIN unless changed by -b */ 136 137 while ((ch = getopt(argc, argv, "1hvCo:s:S:b:B:F:P:R:")) != -1) { 138 switch (ch) { 139 case 'C': 140 addargs(&args, "-C"); 141 break; 142 case 'v': 143 if (debug_level < 3) { 144 addargs(&args, "-v"); 145 ll = SYSLOG_LEVEL_DEBUG1 + debug_level; 146 } 147 debug_level++; 148 break; 149 case 'F': 150 case 'o': 151 addargs(&args, "-%c%s", ch, optarg); 152 break; 153 case '1': 154 sshver = 1; 155 if (sftp_server == NULL) 156 sftp_server = _PATH_SFTP_SERVER; 157 break; 158 case 's': 159 sftp_server = optarg; 160 break; 161 case 'S': 162 ssh_program = optarg; 163 break; 164 case 'b': 165 if (infile == stdin) { 166 infile = fopen(optarg, "r"); 167 if (infile == NULL) 168 fatal("%s (%s).", strerror(errno), optarg); 169 } else 170 fatal("Filename already specified."); 171 showprogress = 0; 172 break; 173 case 'P': 174 sftp_direct = optarg; 175 break; 176 case 'B': 177 copy_buffer_len = strtol(optarg, &cp, 10); 178 if (copy_buffer_len == 0 || *cp != '\0') 179 fatal("Invalid buffer size \"%s\"", optarg); 180 break; 181 case 'R': 182 num_requests = strtol(optarg, &cp, 10); 183 if (num_requests == 0 || *cp != '\0') 184 fatal("Invalid number of requests \"%s\"", 185 optarg); 186 break; 187 case 'h': 188 default: 189 usage(); 190 } 191 } 192 193 log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1); 194 195 if (sftp_direct == NULL) { 196 if (optind == argc || argc > (optind + 2)) 197 usage(); 198 199 userhost = xstrdup(argv[optind]); 200 file2 = argv[optind+1]; 201 202 if ((cp = colon(userhost)) != NULL) { 203 *cp++ = '\0'; 204 file1 = cp; 205 } 206 207 if ((host = strrchr(userhost, '@')) == NULL) 208 host = userhost; 209 else { 210 *host++ = '\0'; 211 if (!userhost[0]) { 212 fprintf(stderr, "Missing username\n"); 213 usage(); 214 } 215 addargs(&args, "-l%s",userhost); 216 } 217 218 host = cleanhostname(host); 219 if (!*host) { 220 fprintf(stderr, "Missing hostname\n"); 221 usage(); 222 } 223 224 addargs(&args, "-oProtocol %d", sshver); 225 226 /* no subsystem if the server-spec contains a '/' */ 227 if (sftp_server == NULL || strchr(sftp_server, '/') == NULL) 228 addargs(&args, "-s"); 229 230 addargs(&args, "%s", host); 231 addargs(&args, "%s", (sftp_server != NULL ? 232 sftp_server : "sftp")); 233 args.list[0] = ssh_program; 234 235 fprintf(stderr, "Connecting to %s...\n", host); 236 connect_to_server(ssh_program, args.list, &in, &out); 237 } else { 238 args.list = NULL; 239 addargs(&args, "sftp-server"); 240 241 fprintf(stderr, "Attaching to %s...\n", sftp_direct); 242 connect_to_server(sftp_direct, args.list, &in, &out); 243 } 244 245 err = interactive_loop(in, out, file1, file2); 246 247 close(in); 248 close(out); 249 if (infile != stdin) 250 fclose(infile); 251 252 while (waitpid(sshpid, NULL, 0) == -1) 253 if (errno != EINTR) 254 fatal("Couldn't wait for ssh process: %s", 255 strerror(errno)); 256 257 exit(err == 0 ? 0 : 1); 258 } 259