Annotation of src/usr.bin/ssh/sftp.c, Revision 1.1
1.1 ! djm 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("$OpenBSD$");
! 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: }
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