790 lines
18 KiB
C
790 lines
18 KiB
C
/*
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* Copyright (c) 1983, 1990, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "rcp_locl.h"
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#include <getarg.h>
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#define RSH_PROGRAM "rsh"
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struct passwd *pwd;
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uid_t userid;
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int errs, remin, remout;
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int pflag, iamremote, iamrecursive, targetshouldbedirectory;
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int doencrypt, noencrypt;
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int usebroken, usekrb4, usekrb5, forwardtkt;
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char *port;
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#define CMDNEEDS 64
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char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
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int response (void);
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void rsource (char *, struct stat *);
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void sink (int, char *[]);
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void source (int, char *[]);
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void tolocal (int, char *[]);
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void toremote (char *, int, char *[]);
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int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout);
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static int fflag, tflag;
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static int version_flag, help_flag;
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struct getargs args[] = {
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{ NULL, '4', arg_flag, &usekrb4, "use Kerberos 4 authentication" },
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{ NULL, '5', arg_flag, &usekrb5, "use Kerberos 5 authentication" },
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{ NULL, 'F', arg_flag, &forwardtkt, "forward credentials" },
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{ NULL, 'K', arg_flag, &usebroken, "use BSD authentication" },
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{ NULL, 'P', arg_string, &port, "non-default port", "port" },
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{ NULL, 'p', arg_flag, &pflag, "preserve file permissions" },
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{ NULL, 'r', arg_flag, &iamrecursive, "recursive mode" },
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{ NULL, 'x', arg_flag, &doencrypt, "use encryption" },
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{ NULL, 'z', arg_flag, &noencrypt, "don't encrypt" },
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{ NULL, 'd', arg_flag, &targetshouldbedirectory },
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{ NULL, 'f', arg_flag, &fflag },
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{ NULL, 't', arg_flag, &tflag },
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{ "version", 0, arg_flag, &version_flag },
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{ "help", 0, arg_flag, &help_flag }
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};
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static void
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usage (int ret)
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{
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arg_printusage (args,
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sizeof(args) / sizeof(args[0]),
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NULL,
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"file1 file2|file... directory");
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exit (ret);
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}
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int
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main(int argc, char **argv)
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{
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char *targ;
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int optind = 0;
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setprogname(argv[0]);
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if (getarg (args, sizeof(args) / sizeof(args[0]), argc, argv,
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&optind))
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usage (1);
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if(help_flag)
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usage(0);
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if (version_flag) {
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print_version (NULL);
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return 0;
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}
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iamremote = (fflag || tflag);
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argc -= optind;
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argv += optind;
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if ((pwd = getpwuid(userid = getuid())) == NULL)
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errx(1, "unknown user %d", (int)userid);
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remin = STDIN_FILENO; /* XXX */
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remout = STDOUT_FILENO;
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if (fflag) { /* Follow "protocol", send data. */
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response();
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setuid(userid);
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source(argc, argv);
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exit(errs);
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}
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if (tflag) { /* Receive data. */
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setuid(userid);
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sink(argc, argv);
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exit(errs);
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}
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if (argc < 2)
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usage(1);
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if (argc > 2)
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targetshouldbedirectory = 1;
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remin = remout = -1;
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/* Command to be executed on remote system using "rsh". */
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snprintf(cmd, sizeof(cmd),
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"rcp%s%s%s", iamrecursive ? " -r" : "",
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pflag ? " -p" : "", targetshouldbedirectory ? " -d" : "");
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signal(SIGPIPE, lostconn);
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if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
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toremote(targ, argc, argv);
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else {
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tolocal(argc, argv); /* Dest is local host. */
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if (targetshouldbedirectory)
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verifydir(argv[argc - 1]);
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}
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exit(errs);
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}
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void
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toremote(char *targ, int argc, char **argv)
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{
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int i;
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char *bp, *host, *src, *suser, *thost, *tuser;
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*targ++ = 0;
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if (*targ == 0)
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targ = ".";
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if ((thost = strchr(argv[argc - 1], '@'))) {
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/* user@host */
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*thost++ = 0;
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tuser = argv[argc - 1];
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if (*tuser == '\0')
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tuser = NULL;
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else if (!okname(tuser))
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exit(1);
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} else {
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thost = argv[argc - 1];
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tuser = NULL;
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}
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for (i = 0; i < argc - 1; i++) {
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src = colon(argv[i]);
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if (src) { /* remote to remote */
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*src++ = 0;
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if (*src == 0)
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src = ".";
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host = strchr(argv[i], '@');
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if (host) {
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*host++ = '\0';
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suser = argv[i];
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if (*suser == '\0')
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suser = pwd->pw_name;
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else if (!okname(suser))
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continue;
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asprintf(&bp,
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"%s %s -l %s -n %s %s '%s%s%s:%s'",
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_PATH_RSH, host, suser, cmd, src,
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tuser ? tuser : "", tuser ? "@" : "",
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thost, targ);
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} else {
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asprintf(&bp,
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"exec %s %s -n %s %s '%s%s%s:%s'",
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_PATH_RSH, argv[i], cmd, src,
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tuser ? tuser : "", tuser ? "@" : "",
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thost, targ);
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}
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if (bp == NULL)
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err (1, "malloc");
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susystem(bp, userid);
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free(bp);
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} else { /* local to remote */
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if (remin == -1) {
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asprintf(&bp, "%s -t %s", cmd, targ);
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if (bp == NULL)
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err (1, "malloc");
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host = thost;
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if (do_cmd(host, tuser, bp, &remin, &remout) < 0)
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exit(1);
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if (response() < 0)
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exit(1);
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free(bp);
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setuid(userid);
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}
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source(1, argv+i);
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}
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}
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}
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void
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tolocal(int argc, char **argv)
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{
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int i;
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char *bp, *host, *src, *suser;
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for (i = 0; i < argc - 1; i++) {
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if (!(src = colon(argv[i]))) { /* Local to local. */
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asprintf(&bp, "exec %s%s%s %s %s", _PATH_CP,
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iamrecursive ? " -PR" : "", pflag ? " -p" : "",
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argv[i], argv[argc - 1]);
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if (bp == NULL)
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err (1, "malloc");
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if (susystem(bp, userid))
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++errs;
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free(bp);
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continue;
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}
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*src++ = 0;
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if (*src == 0)
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src = ".";
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if ((host = strchr(argv[i], '@')) == NULL) {
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host = argv[i];
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suser = pwd->pw_name;
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} else {
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*host++ = 0;
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suser = argv[i];
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if (*suser == '\0')
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suser = pwd->pw_name;
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else if (!okname(suser))
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continue;
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}
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asprintf(&bp, "%s -f %s", cmd, src);
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if (bp == NULL)
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err (1, "malloc");
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if (do_cmd(host, suser, bp, &remin, &remout) < 0) {
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free(bp);
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++errs;
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continue;
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}
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free(bp);
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sink(1, argv + argc - 1);
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seteuid(0);
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close(remin);
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remin = remout = -1;
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}
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}
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void
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source(int argc, char **argv)
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{
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struct stat stb;
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static BUF buffer;
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BUF *bp;
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off_t i;
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int amt, fd, haderr, indx, result;
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char *last, *name, buf[BUFSIZ];
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for (indx = 0; indx < argc; ++indx) {
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name = argv[indx];
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if ((fd = open(name, O_RDONLY, 0)) < 0)
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goto syserr;
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if (fstat(fd, &stb)) {
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syserr: run_err("%s: %s", name, strerror(errno));
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goto next;
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}
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switch (stb.st_mode & S_IFMT) {
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case S_IFREG:
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break;
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case S_IFDIR:
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if (iamrecursive) {
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rsource(name, &stb);
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goto next;
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}
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/* FALLTHROUGH */
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default:
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run_err("%s: not a regular file", name);
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goto next;
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}
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if ((last = strrchr(name, '/')) == NULL)
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last = name;
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else
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++last;
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if (pflag) {
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/*
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* Make it compatible with possible future
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* versions expecting microseconds.
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*/
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snprintf(buf, sizeof(buf), "T%ld 0 %ld 0\n",
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(long)stb.st_mtime,
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(long)stb.st_atime);
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write(remout, buf, strlen(buf));
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if (response() < 0)
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goto next;
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}
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#define MODEMASK (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO)
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snprintf(buf, sizeof(buf), "C%04o %lu %s\n",
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stb.st_mode & MODEMASK,
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(unsigned long)stb.st_size,
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last);
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write(remout, buf, strlen(buf));
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if (response() < 0)
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goto next;
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if ((bp = allocbuf(&buffer, fd, BUFSIZ)) == NULL) {
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next: close(fd);
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continue;
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}
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/* Keep writing after an error so that we stay sync'd up. */
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for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
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amt = bp->cnt;
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if (i + amt > stb.st_size)
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amt = stb.st_size - i;
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if (!haderr) {
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result = read(fd, bp->buf, amt);
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if (result != amt)
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haderr = result >= 0 ? EIO : errno;
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}
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if (haderr)
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write(remout, bp->buf, amt);
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else {
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result = write(remout, bp->buf, amt);
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if (result != amt)
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haderr = result >= 0 ? EIO : errno;
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}
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}
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if (close(fd) && !haderr)
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haderr = errno;
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if (!haderr)
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write(remout, "", 1);
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else
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run_err("%s: %s", name, strerror(haderr));
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response();
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}
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}
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void
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rsource(char *name, struct stat *statp)
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{
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DIR *dirp;
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struct dirent *dp;
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char *last, *vect[1], path[MAXPATHLEN];
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if (!(dirp = opendir(name))) {
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run_err("%s: %s", name, strerror(errno));
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return;
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}
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last = strrchr(name, '/');
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if (last == 0)
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last = name;
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else
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last++;
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if (pflag) {
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snprintf(path, sizeof(path), "T%ld 0 %ld 0\n",
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(long)statp->st_mtime,
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(long)statp->st_atime);
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write(remout, path, strlen(path));
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if (response() < 0) {
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closedir(dirp);
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return;
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}
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}
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snprintf(path, sizeof(path),
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"D%04o %d %s\n", statp->st_mode & MODEMASK, 0, last);
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write(remout, path, strlen(path));
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if (response() < 0) {
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closedir(dirp);
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return;
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}
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while ((dp = readdir(dirp))) {
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if (dp->d_ino == 0)
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continue;
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if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
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continue;
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if (strlen(name) + 1 + strlen(dp->d_name) >= MAXPATHLEN - 1) {
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run_err("%s/%s: name too long", name, dp->d_name);
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continue;
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}
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snprintf(path, sizeof(path), "%s/%s", name, dp->d_name);
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vect[0] = path;
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source(1, vect);
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}
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closedir(dirp);
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write(remout, "E\n", 2);
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response();
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}
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void
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sink(int argc, char **argv)
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{
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static BUF buffer;
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struct stat stb;
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struct timeval tv[2];
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enum { YES, NO, DISPLAYED } wrerr;
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BUF *bp;
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off_t i, j, size;
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int amt, count, exists, first, mask, mode, ofd, omode;
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int setimes, targisdir, wrerrno = 0;
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char ch, *cp, *np, *targ, *why, *vect[1], buf[BUFSIZ];
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#define atime tv[0]
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#define mtime tv[1]
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#define SCREWUP(str) { why = str; goto screwup; }
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setimes = targisdir = 0;
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mask = umask(0);
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if (!pflag)
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umask(mask);
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if (argc != 1) {
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run_err("ambiguous target");
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exit(1);
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}
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targ = *argv;
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if (targetshouldbedirectory)
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verifydir(targ);
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write(remout, "", 1);
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if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
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targisdir = 1;
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for (first = 1;; first = 0) {
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cp = buf;
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if (read(remin, cp, 1) <= 0)
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return;
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if (*cp++ == '\n')
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SCREWUP("unexpected <newline>");
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do {
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if (read(remin, &ch, sizeof(ch)) != sizeof(ch))
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SCREWUP("lost connection");
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*cp++ = ch;
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} while (cp < &buf[BUFSIZ - 1] && ch != '\n');
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*cp = 0;
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if (buf[0] == '\01' || buf[0] == '\02') {
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if (iamremote == 0)
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write(STDERR_FILENO,
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buf + 1, strlen(buf + 1));
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if (buf[0] == '\02')
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exit(1);
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++errs;
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continue;
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}
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if (buf[0] == 'E') {
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write(remout, "", 1);
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return;
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}
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if (ch == '\n')
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*--cp = 0;
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cp = buf;
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if (*cp == 'T') {
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setimes++;
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cp++;
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mtime.tv_sec = strtol(cp, &cp, 10);
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if (!cp || *cp++ != ' ')
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SCREWUP("mtime.sec not delimited");
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mtime.tv_usec = strtol(cp, &cp, 10);
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if (!cp || *cp++ != ' ')
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SCREWUP("mtime.usec not delimited");
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atime.tv_sec = strtol(cp, &cp, 10);
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if (!cp || *cp++ != ' ')
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SCREWUP("atime.sec not delimited");
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atime.tv_usec = strtol(cp, &cp, 10);
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if (!cp || *cp++ != '\0')
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SCREWUP("atime.usec not delimited");
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write(remout, "", 1);
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continue;
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}
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if (*cp != 'C' && *cp != 'D') {
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/*
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* Check for the case "rcp remote:foo\* local:bar".
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* In this case, the line "No match." can be returned
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* by the shell before the rcp command on the remote is
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* executed so the ^Aerror_message convention isn't
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* followed.
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*/
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if (first) {
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run_err("%s", cp);
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exit(1);
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}
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SCREWUP("expected control record");
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}
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mode = 0;
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for (++cp; cp < buf + 5; cp++) {
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if (*cp < '0' || *cp > '7')
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SCREWUP("bad mode");
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mode = (mode << 3) | (*cp - '0');
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}
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if (*cp++ != ' ')
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SCREWUP("mode not delimited");
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|
|
for (size = 0; isdigit((unsigned char)*cp);)
|
|
size = size * 10 + (*cp++ - '0');
|
|
if (*cp++ != ' ')
|
|
SCREWUP("size not delimited");
|
|
if (targisdir) {
|
|
static char *namebuf;
|
|
static int cursize;
|
|
size_t need;
|
|
|
|
need = strlen(targ) + strlen(cp) + 250;
|
|
if (need > cursize) {
|
|
if (!(namebuf = malloc(need)))
|
|
run_err("%s", strerror(errno));
|
|
}
|
|
snprintf(namebuf, need, "%s%s%s", targ,
|
|
*targ ? "/" : "", cp);
|
|
np = namebuf;
|
|
} else
|
|
np = targ;
|
|
exists = stat(np, &stb) == 0;
|
|
if (buf[0] == 'D') {
|
|
int mod_flag = pflag;
|
|
if (exists) {
|
|
if (!S_ISDIR(stb.st_mode)) {
|
|
errno = ENOTDIR;
|
|
goto bad;
|
|
}
|
|
if (pflag)
|
|
chmod(np, mode);
|
|
} else {
|
|
/* Handle copying from a read-only directory */
|
|
mod_flag = 1;
|
|
if (mkdir(np, mode | S_IRWXU) < 0)
|
|
goto bad;
|
|
}
|
|
vect[0] = np;
|
|
sink(1, vect);
|
|
if (setimes) {
|
|
setimes = 0;
|
|
if (utimes(np, tv) < 0)
|
|
run_err("%s: set times: %s",
|
|
np, strerror(errno));
|
|
}
|
|
if (mod_flag)
|
|
chmod(np, mode);
|
|
continue;
|
|
}
|
|
omode = mode;
|
|
mode |= S_IWRITE;
|
|
if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
|
|
bad: run_err("%s: %s", np, strerror(errno));
|
|
continue;
|
|
}
|
|
write(remout, "", 1);
|
|
if ((bp = allocbuf(&buffer, ofd, BUFSIZ)) == NULL) {
|
|
close(ofd);
|
|
continue;
|
|
}
|
|
cp = bp->buf;
|
|
wrerr = NO;
|
|
for (count = i = 0; i < size; i += BUFSIZ) {
|
|
amt = BUFSIZ;
|
|
if (i + amt > size)
|
|
amt = size - i;
|
|
count += amt;
|
|
if((j = net_read(remin, cp, amt)) != amt) {
|
|
run_err("%s", j ? strerror(errno) :
|
|
"dropped connection");
|
|
exit(1);
|
|
}
|
|
amt -= j;
|
|
cp += j;
|
|
if (count == bp->cnt) {
|
|
/* Keep reading so we stay sync'd up. */
|
|
if (wrerr == NO) {
|
|
j = write(ofd, bp->buf, count);
|
|
if (j != count) {
|
|
wrerr = YES;
|
|
wrerrno = j >= 0 ? EIO : errno;
|
|
}
|
|
}
|
|
count = 0;
|
|
cp = bp->buf;
|
|
}
|
|
}
|
|
if (count != 0 && wrerr == NO &&
|
|
(j = write(ofd, bp->buf, count)) != count) {
|
|
wrerr = YES;
|
|
wrerrno = j >= 0 ? EIO : errno;
|
|
}
|
|
if (ftruncate(ofd, size)) {
|
|
run_err("%s: truncate: %s", np, strerror(errno));
|
|
wrerr = DISPLAYED;
|
|
}
|
|
if (pflag) {
|
|
if (exists || omode != mode)
|
|
if (fchmod(ofd, omode))
|
|
run_err("%s: set mode: %s",
|
|
np, strerror(errno));
|
|
} else {
|
|
if (!exists && omode != mode)
|
|
if (fchmod(ofd, omode & ~mask))
|
|
run_err("%s: set mode: %s",
|
|
np, strerror(errno));
|
|
}
|
|
close(ofd);
|
|
response();
|
|
if (setimes && wrerr == NO) {
|
|
setimes = 0;
|
|
if (utimes(np, tv) < 0) {
|
|
run_err("%s: set times: %s",
|
|
np, strerror(errno));
|
|
wrerr = DISPLAYED;
|
|
}
|
|
}
|
|
switch(wrerr) {
|
|
case YES:
|
|
run_err("%s: %s", np, strerror(wrerrno));
|
|
break;
|
|
case NO:
|
|
write(remout, "", 1);
|
|
break;
|
|
case DISPLAYED:
|
|
break;
|
|
}
|
|
}
|
|
screwup:
|
|
run_err("protocol error: %s", why);
|
|
exit(1);
|
|
}
|
|
|
|
int
|
|
response(void)
|
|
{
|
|
char ch, *cp, resp, rbuf[BUFSIZ];
|
|
|
|
if (read(remin, &resp, sizeof(resp)) != sizeof(resp))
|
|
lostconn(0);
|
|
|
|
cp = rbuf;
|
|
switch(resp) {
|
|
case 0: /* ok */
|
|
return (0);
|
|
default:
|
|
*cp++ = resp;
|
|
/* FALLTHROUGH */
|
|
case 1: /* error, followed by error msg */
|
|
case 2: /* fatal error, "" */
|
|
do {
|
|
if (read(remin, &ch, sizeof(ch)) != sizeof(ch))
|
|
lostconn(0);
|
|
*cp++ = ch;
|
|
} while (cp < &rbuf[BUFSIZ] && ch != '\n');
|
|
|
|
if (!iamremote)
|
|
write(STDERR_FILENO, rbuf, cp - rbuf);
|
|
++errs;
|
|
if (resp == 1)
|
|
return (-1);
|
|
exit(1);
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
#include <stdarg.h>
|
|
|
|
void
|
|
run_err(const char *fmt, ...)
|
|
{
|
|
static FILE *fp;
|
|
va_list ap;
|
|
|
|
++errs;
|
|
if (fp == NULL && !(fp = fdopen(remout, "w")))
|
|
return;
|
|
va_start(ap, fmt);
|
|
fprintf(fp, "%c", 0x01);
|
|
fprintf(fp, "rcp: ");
|
|
vfprintf(fp, fmt, ap);
|
|
fprintf(fp, "\n");
|
|
fflush(fp);
|
|
va_end(ap);
|
|
|
|
if (!iamremote) {
|
|
va_start(ap, fmt);
|
|
vwarnx(fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This function executes the given command as the specified user on the
|
|
* given host. This returns < 0 if execution fails, and >= 0 otherwise. This
|
|
* assigns the input and output file descriptors on success.
|
|
*
|
|
* If it cannot create necessary pipes it exits with error message.
|
|
*/
|
|
|
|
int
|
|
do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
|
|
{
|
|
int pin[2], pout[2], reserved[2];
|
|
|
|
/*
|
|
* Reserve two descriptors so that the real pipes won't get
|
|
* descriptors 0 and 1 because that will screw up dup2 below.
|
|
*/
|
|
pipe(reserved);
|
|
|
|
/* Create a socket pair for communicating with rsh. */
|
|
if (pipe(pin) < 0) {
|
|
perror("pipe");
|
|
exit(255);
|
|
}
|
|
if (pipe(pout) < 0) {
|
|
perror("pipe");
|
|
exit(255);
|
|
}
|
|
|
|
/* Free the reserved descriptors. */
|
|
close(reserved[0]);
|
|
close(reserved[1]);
|
|
|
|
/* For a child to execute the command on the remote host using rsh. */
|
|
if (fork() == 0) {
|
|
char *args[100];
|
|
unsigned int i;
|
|
|
|
/* Child. */
|
|
close(pin[1]);
|
|
close(pout[0]);
|
|
dup2(pin[0], 0);
|
|
dup2(pout[1], 1);
|
|
close(pin[0]);
|
|
close(pout[1]);
|
|
|
|
i = 0;
|
|
args[i++] = RSH_PROGRAM;
|
|
if (usekrb4)
|
|
args[i++] = "-4";
|
|
if (usekrb5)
|
|
args[i++] = "-5";
|
|
if (usebroken)
|
|
args[i++] = "-K";
|
|
if (doencrypt)
|
|
args[i++] = "-x";
|
|
if (forwardtkt)
|
|
args[i++] = "-F";
|
|
if (noencrypt)
|
|
args[i++] = "-z";
|
|
if (port != NULL) {
|
|
args[i++] = "-p";
|
|
args[i++] = port;
|
|
}
|
|
if (remuser != NULL) {
|
|
args[i++] = "-l";
|
|
args[i++] = remuser;
|
|
}
|
|
args[i++] = host;
|
|
args[i++] = cmd;
|
|
args[i++] = NULL;
|
|
|
|
execvp(RSH_PROGRAM, args);
|
|
perror(RSH_PROGRAM);
|
|
exit(1);
|
|
}
|
|
/* Parent. Close the other side, and return the local side. */
|
|
close(pin[0]);
|
|
*fdout = pin[1];
|
|
close(pout[1]);
|
|
*fdin = pout[0];
|
|
return 0;
|
|
}
|