diff options
Diffstat (limited to 'crypto/openssh/sftp.c')
-rw-r--r-- | crypto/openssh/sftp.c | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/crypto/openssh/sftp.c b/crypto/openssh/sftp.c new file mode 100644 index 0000000..2c57bef --- /dev/null +++ b/crypto/openssh/sftp.c @@ -0,0 +1,271 @@ +/* + * 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 1.15 2001/04/16 02:31:44 mouring Exp $"); + +/* XXX: commandline mode */ +/* 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" + +#include "scp-common.h" + +int use_ssh1 = 0; +char *ssh_program = _PATH_SSH_PROGRAM; +char *sftp_server = NULL; +FILE* infile; + +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(ssh_program, args); + fprintf(stderr, "exec: %s: %s\n", ssh_program, 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 = 2; + i = 0; + args = xmalloc(sizeof(*args) * nargs); + args[i++] = "ssh"; + 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); + } + + /* no subsystem if the server-spec contains a '/' */ + if (sftp_server == NULL || strchr(sftp_server, '/') == NULL) + make_ssh_args("-s"); + make_ssh_args("-oForwardX11=no"); + make_ssh_args("-oForwardAgent=no"); + make_ssh_args(use_ssh1 ? "-oProtocol=1" : "-oProtocol=2"); + + /* Otherwise finish up and return the arg array */ + if (sftp_server != NULL) + make_ssh_args(sftp_server); + else + 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 [-1vC] [-b batchfile] [-osshopt=value] [user@]host[:file [file]]\n"); + exit(1); +} + +int +main(int argc, char **argv) +{ + int in, out, ch, debug_level, compress_flag; + pid_t sshpid; + char *file1 = NULL; + char *host, *userhost, *cp, *file2; + LogLevel ll; + extern int optind; + extern char *optarg; + + infile = stdin; /* Read from STDIN unless changed by -b */ + debug_level = compress_flag = 0; + + while ((ch = getopt(argc, argv, "1hvCo:s:S:b:")) != -1) { + switch (ch) { + case 'C': + compress_flag = 1; + break; + case 'v': + debug_level = MIN(3, debug_level + 1); + break; + case 'o': + make_ssh_args("-o"); + make_ssh_args(optarg); + break; + case '1': + use_ssh1 = 1; + if (sftp_server == NULL) + sftp_server = _PATH_SFTP_SERVER; + break; + case 's': + sftp_server = optarg; + break; + case 'S': + ssh_program = optarg; + break; + case 'b': + if (infile == stdin) { + infile = fopen(optarg, "r"); + if (infile == NULL) + fatal("%s (%s).", strerror(errno), optarg); + } else + fatal("Filename already specified."); + break; + case 'h': + default: + usage(); + } + } + + if (optind == argc || argc > (optind + 2)) + usage(); + + userhost = xstrdup(argv[optind]); + file2 = argv[optind+1]; + + if ((cp = colon(userhost)) != NULL) { + *cp++ = '\0'; + file1 = cp; + } + + if ((host = strchr(userhost, '@')) == NULL) + host = userhost; + else { + *host++ = '\0'; + if (!userhost[0]) { + fprintf(stderr, "Missing username\n"); + usage(); + } + make_ssh_args("-l"); + make_ssh_args(userhost); + } + + host = cleanhostname(host); + if (!*host) { + 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(host); + + fprintf(stderr, "Connecting to %s...\n", host); + + connect_to_server(make_ssh_args(NULL), &in, &out, &sshpid); + + interactive_loop(in, out, file1, file2); + + close(in); + close(out); + if (infile != stdin) + fclose(infile); + + if (waitpid(sshpid, NULL, 0) == -1) + fatal("Couldn't wait for ssh process: %s", strerror(errno)); + + exit(0); +} |