diff options
Diffstat (limited to 'sftp.c')
| -rw-r--r-- | sftp.c | 222 |
1 files changed, 222 insertions, 0 deletions
@@ -0,0 +1,222 @@ +/* + * Copyright (c) 2001 Damien Miller. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "includes.h" + +RCSID("$OpenBSD: sftp.c,v 1.1 2001/02/04 11:11:54 djm Exp $"); + +/* XXX: commandline mode */ +/* XXX: copy between two remote hosts (commandline) */ +/* XXX: short-form remote directory listings (like 'ls -C') */ + +#include "buffer.h" +#include "xmalloc.h" +#include "log.h" +#include "pathnames.h" + +#include "sftp.h" +#include "sftp-common.h" +#include "sftp-client.h" +#include "sftp-int.h" + +void +connect_to_server(char **args, int *in, int *out, pid_t *sshpid) +{ + int c_in, c_out; +#ifdef USE_PIPES + int pin[2], pout[2]; + if ((pipe(pin) == -1) || (pipe(pout) == -1)) + fatal("pipe: %s", strerror(errno)); + *in = pin[0]; + *out = pout[1]; + c_in = pout[0]; + c_out = pin[1]; +#else /* USE_PIPES */ + int inout[2]; + if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) == -1) + fatal("socketpair: %s", strerror(errno)); + *in = *out = inout[0]; + c_in = c_out = inout[1]; +#endif /* USE_PIPES */ + + if ((*sshpid = fork()) == -1) + fatal("fork: %s", strerror(errno)); + else if (*sshpid == 0) { + if ((dup2(c_in, STDIN_FILENO) == -1) || + (dup2(c_out, STDOUT_FILENO) == -1)) { + fprintf(stderr, "dup2: %s\n", strerror(errno)); + exit(1); + } + close(*in); + close(*out); + close(c_in); + close(c_out); + execv(_PATH_SSH_PROGRAM, args); + fprintf(stderr, "exec: %s", strerror(errno)); + exit(1); + } + + close(c_in); + close(c_out); +} + +char ** +make_ssh_args(char *add_arg) +{ + static char **args = NULL; + static int nargs = 0; + char debug_buf[4096]; + int i; + + /* Init args array */ + if (args == NULL) { + nargs = 4; + i = 0; + args = xmalloc(sizeof(*args) * nargs); + args[i++] = "ssh"; + args[i++] = "-oProtocol=2"; + args[i++] = "-s"; + args[i++] = NULL; + } + + /* If asked to add args, then do so and return */ + if (add_arg) { + i = nargs++ - 1; + args = xrealloc(args, sizeof(*args) * nargs); + args[i++] = add_arg; + args[i++] = NULL; + return(NULL); + } + + /* Otherwise finish up and return the arg array */ + make_ssh_args("sftp"); + + /* XXX: overflow - doesn't grow debug_buf */ + debug_buf[0] = '\0'; + for(i = 0; args[i]; i++) { + if (i) + strlcat(debug_buf, " ", sizeof(debug_buf)); + + strlcat(debug_buf, args[i], sizeof(debug_buf)); + } + debug("SSH args \"%s\"", debug_buf); + + return(args); +} + +void +usage(void) +{ + fprintf(stderr, "usage: sftp [-vC] [-osshopt=value] [user@]host\n"); + exit(1); +} + +int +main(int argc, char **argv) +{ + int in, out, i, debug_level, compress_flag; + pid_t sshpid; + char *cp; + LogLevel ll; + + debug_level = compress_flag = 0; + for(i = 1; i < argc && argv[i][0] == '-'; i++) { + if (!strcmp(argv[i], "-v")) + debug_level = MIN(3, debug_level + 1); + else if (!strcmp(argv[i], "-C")) + compress_flag = 1; + else if (!strncmp(argv[i], "-o", 2)) { + make_ssh_args(argv[i]); + } else { + fprintf(stderr, "Unknown option \"%s\"\n", argv[i]); + usage(); + } + } + + if (i == argc || argc > (i + 1)) + usage(); + + if ((cp = strchr(argv[i], '@')) == NULL) + cp = argv[i]; + else { + *cp = '\0'; + if (!argv[i][0]) { + fprintf(stderr, "Missing username\n"); + usage(); + } + make_ssh_args("-l"); + make_ssh_args(argv[i]); + cp++; + } + + if (!*cp) { + fprintf(stderr, "Missing hostname\n"); + usage(); + } + + /* Set up logging and debug '-d' arguments to ssh */ + ll = SYSLOG_LEVEL_INFO; + switch (debug_level) { + case 1: + ll = SYSLOG_LEVEL_DEBUG1; + make_ssh_args("-v"); + break; + case 2: + ll = SYSLOG_LEVEL_DEBUG2; + make_ssh_args("-v"); + make_ssh_args("-v"); + break; + case 3: + ll = SYSLOG_LEVEL_DEBUG3; + make_ssh_args("-v"); + make_ssh_args("-v"); + make_ssh_args("-v"); + break; + } + + if (compress_flag) + make_ssh_args("-C"); + + log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1); + + make_ssh_args(cp); + + fprintf(stderr, "Connecting to %s...\n", cp); + + connect_to_server(make_ssh_args(NULL), &in, &out, &sshpid); + + do_init(in, out); + + interactive_loop(in, out); + + close(in); + close(out); + + if (kill(sshpid, SIGHUP) == -1) + fatal("Couldn't terminate ssh process: %s", strerror(errno)); + + /* XXX: wait? */ + + exit(0); +} |