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 1.18 2001/06/23 15:12:20 itojun Exp $"); 28 29 /* XXX: commandline mode */ 30 /* XXX: short-form remote directory listings (like 'ls -C') */ 31 32 #include "buffer.h" 33 #include "xmalloc.h" 34 #include "log.h" 35 #include "pathnames.h" 36 #include "misc.h" 37 38 #include "sftp.h" 39 #include "sftp-common.h" 40 #include "sftp-client.h" 41 #include "sftp-int.h" 42 43 char *ssh_program = _PATH_SSH_PROGRAM; 44 FILE* infile; 45 46 static void 47 connect_to_server(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(ssh_program, args); 79 fprintf(stderr, "exec: %s: %s\n", ssh_program, 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 fprintf(stderr, "usage: sftp [-1vC] [-b batchfile] [-osshopt=value] [user@]host[:file [file]]\n"); 91 exit(1); 92 } 93 94 int 95 main(int argc, char **argv) 96 { 97 int in, out, ch; 98 pid_t sshpid; 99 char *host, *userhost, *cp, *file2; 100 int debug_level = 0, sshver = 2; 101 char *file1 = NULL, *sftp_server = NULL; 102 LogLevel ll = SYSLOG_LEVEL_INFO; 103 arglist args; 104 extern int optind; 105 extern char *optarg; 106 107 args.list = NULL; 108 addargs(&args, "ssh"); /* overwritten with ssh_program */ 109 addargs(&args, "-oFallBackToRsh no"); 110 addargs(&args, "-oForwardX11 no"); 111 addargs(&args, "-oForwardAgent no"); 112 ll = SYSLOG_LEVEL_INFO; 113 infile = stdin; /* Read from STDIN unless changed by -b */ 114 115 while ((ch = getopt(argc, argv, "1hvCo:s:S:b:")) != -1) { 116 switch (ch) { 117 case 'C': 118 addargs(&args, "-C"); 119 break; 120 case 'v': 121 if (debug_level < 3) { 122 addargs(&args, "-v"); 123 ll = SYSLOG_LEVEL_DEBUG1 + debug_level; 124 } 125 debug_level++; 126 break; 127 case 'o': 128 addargs(&args, "-o%s", optarg); 129 break; 130 case '1': 131 sshver = 1; 132 if (sftp_server == NULL) 133 sftp_server = _PATH_SFTP_SERVER; 134 break; 135 case 's': 136 sftp_server = optarg; 137 break; 138 case 'S': 139 ssh_program = optarg; 140 break; 141 case 'b': 142 if (infile == stdin) { 143 infile = fopen(optarg, "r"); 144 if (infile == NULL) 145 fatal("%s (%s).", strerror(errno), optarg); 146 } else 147 fatal("Filename already specified."); 148 break; 149 case 'h': 150 default: 151 usage(); 152 } 153 } 154 155 if (optind == argc || argc > (optind + 2)) 156 usage(); 157 158 userhost = xstrdup(argv[optind]); 159 file2 = argv[optind+1]; 160 161 if ((cp = colon(userhost)) != NULL) { 162 *cp++ = '\0'; 163 file1 = cp; 164 } 165 166 if ((host = strchr(userhost, '@')) == NULL) 167 host = userhost; 168 else { 169 *host++ = '\0'; 170 if (!userhost[0]) { 171 fprintf(stderr, "Missing username\n"); 172 usage(); 173 } 174 addargs(&args, "-l%s",userhost); 175 } 176 177 host = cleanhostname(host); 178 if (!*host) { 179 fprintf(stderr, "Missing hostname\n"); 180 usage(); 181 } 182 183 log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1); 184 addargs(&args, "-oProtocol %d", sshver); 185 186 /* no subsystem if the server-spec contains a '/' */ 187 if (sftp_server == NULL || strchr(sftp_server, '/') == NULL) 188 addargs(&args, "-s"); 189 190 addargs(&args, "%s", host); 191 addargs(&args, "%s", (sftp_server != NULL ? sftp_server : "sftp")); 192 args.list[0] = ssh_program; 193 194 fprintf(stderr, "Connecting to %s...\n", host); 195 196 connect_to_server(args.list, &in, &out, &sshpid); 197 198 interactive_loop(in, out, file1, file2); 199 200 close(in); 201 close(out); 202 if (infile != stdin) 203 fclose(infile); 204 205 if (waitpid(sshpid, NULL, 0) == -1) 206 fatal("Couldn't wait for ssh process: %s", strerror(errno)); 207 208 exit(0); 209 } 210