793 lines
18 KiB
C
793 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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* Copyright (c) 2002 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* Portions of this software were developed for the FreeBSD Project by
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* ThinkSec AS and NAI Labs, the Security Research Division of Network
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* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
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* ("CBOSS"), as part of the DARPA CHATS research program.
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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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* 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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#if 0
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#ifndef lint
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static char const copyright[] =
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"@(#) Copyright (c) 1983, 1990, 1992, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)rcp.c 8.2 (Berkeley) 4/2/94";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <ctype.h>
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#include <dirent.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <libutil.h>
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#include <limits.h>
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#include <netdb.h>
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#include <paths.h>
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#include <pwd.h>
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#include <signal.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <string.h>
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#include <unistd.h>
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#include "extern.h"
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#define OPTIONS "46dfprt"
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struct passwd *pwd;
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u_short port;
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uid_t userid;
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int errs, rem;
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int pflag, iamremote, iamrecursive, targetshouldbedirectory;
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int family = PF_UNSPEC;
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static int argc_copy;
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static const char **argv_copy;
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static char period[] = ".";
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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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void usage(void);
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int
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main(int argc, char *argv[])
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{
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struct servent *sp;
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int ch, fflag, i, tflag;
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char *targ;
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/*
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* Prepare for execing ourselves.
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*/
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argc_copy = argc + 1;
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argv_copy = malloc((argc_copy + 1) * sizeof(*argv_copy));
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if (argv_copy == NULL)
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err(1, "malloc");
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argv_copy[0] = argv[0];
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argv_copy[1] = "-K";
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for (i = 1; i < argc; ++i) {
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argv_copy[i + 1] = strdup(argv[i]);
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if (argv_copy[i + 1] == NULL)
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errx(1, "strdup: out of memory");
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}
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argv_copy[argc + 1] = NULL;
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fflag = tflag = 0;
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while ((ch = getopt(argc, argv, OPTIONS)) != -1)
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switch(ch) { /* User-visible flags. */
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case '4':
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family = PF_INET;
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break;
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case '6':
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family = PF_INET6;
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break;
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case 'p':
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pflag = 1;
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break;
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case 'r':
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iamrecursive = 1;
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break;
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/* Server options. */
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case 'd':
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targetshouldbedirectory = 1;
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break;
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case 'f': /* "from" */
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iamremote = 1;
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fflag = 1;
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break;
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case 't': /* "to" */
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iamremote = 1;
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tflag = 1;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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sp = getservbyname("shell", "tcp");
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if (sp == NULL)
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errx(1, "shell/tcp: unknown service");
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port = sp->s_port;
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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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rem = STDIN_FILENO; /* XXX */
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if (fflag) { /* Follow "protocol", send data. */
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(void)response();
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(void)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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(void)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();
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if (argc > 2)
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targetshouldbedirectory = 1;
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rem = -1;
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/* Command to be executed on remote system using "rsh". */
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(void)snprintf(cmd, sizeof(cmd), "rcp%s%s%s",
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iamrecursive ? " -r" : "", pflag ? " -p" : "",
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targetshouldbedirectory ? " -d" : "");
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(void)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, tos;
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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 = period;
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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 = period;
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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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++errs;
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continue;
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}
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if (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) == -1)
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err(1, "asprintf");
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} else
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if (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) == -1)
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err(1, "asprintf");
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(void)susystem(bp, userid);
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(void)free(bp);
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} else { /* local to remote */
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if (rem == -1) {
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if (asprintf(&bp, "%s -t %s", cmd, targ)
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== -1)
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err(1, "asprintf");
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host = thost;
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rem = rcmd_af(&host, port,
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pwd->pw_name,
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tuser ? tuser : pwd->pw_name,
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bp, 0, family);
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if (rem < 0)
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exit(1);
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if (family == PF_INET) {
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tos = IPTOS_THROUGHPUT;
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if (setsockopt(rem, IPPROTO_IP, IP_TOS,
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&tos, sizeof(int)) < 0)
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warn("TOS (ignored)");
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}
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if (response() < 0)
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exit(1);
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(void)free(bp);
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(void)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, len, tos;
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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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len = strlen(_PATH_CP) + strlen(argv[i]) +
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strlen(argv[argc - 1]) + 20;
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if (!(bp = malloc(len)))
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err(1, "malloc");
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(void)snprintf(bp, len, "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 (susystem(bp, userid))
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++errs;
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(void)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 = period;
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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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++errs;
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continue;
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}
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}
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len = strlen(src) + CMDNEEDS + 20;
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if ((bp = malloc(len)) == NULL)
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err(1, "malloc");
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(void)snprintf(bp, len, "%s -f %s", cmd, src);
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rem = rcmd_af(&host, port, pwd->pw_name, suser, bp, 0,
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family);
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(void)free(bp);
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if (rem < 0) {
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++errs;
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continue;
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}
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(void)seteuid(userid);
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if (family == PF_INET) {
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tos = IPTOS_THROUGHPUT;
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if (setsockopt(rem, IPPROTO_IP, IP_TOS, &tos,
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sizeof(int)) < 0)
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warn("TOS (ignored)");
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}
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sink(1, argv + argc - 1);
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(void)seteuid(0);
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(void)close(rem);
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rem = -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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(void)snprintf(buf, sizeof(buf), "T%ld 0 %ld 0\n",
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(long)stb.st_mtim.tv_sec,
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(long)stb.st_atim.tv_sec);
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(void)write(rem, 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_ISTXT|S_IRWXU|S_IRWXG|S_IRWXO)
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(void)snprintf(buf, sizeof(buf), "C%04o %jd %s\n",
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stb.st_mode & MODEMASK, (intmax_t)stb.st_size, last);
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(void)write(rem, 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: if (fd >= 0)
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(void)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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(void)write(rem, bp->buf, amt);
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else {
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result = write(rem, 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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(void)write(rem, "", 1);
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else
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run_err("%s: %s", name, strerror(haderr));
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(void)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[PATH_MAX];
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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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(void)snprintf(path, sizeof(path), "T%ld 0 %ld 0\n",
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(long)statp->st_mtim.tv_sec,
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(long)statp->st_atim.tv_sec);
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(void)write(rem, 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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(void)snprintf(path, sizeof(path),
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"D%04o %d %s\n", statp->st_mode & MODEMASK, 0, last);
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(void)write(rem, 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) >= sizeof(path)) {
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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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(void)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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(void)closedir(dirp);
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(void)write(rem, "E\n", 2);
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(void)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, exists, first, mask, mode, ofd, omode;
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size_t count;
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int setimes, targisdir, wrerrno = 0;
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char ch, *cp, *np, *targ, *vect[1], buf[BUFSIZ], path[PATH_MAX];
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const char *why;
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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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(void)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);
|
|
(void)write(rem, "", 1);
|
|
if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
|
|
targisdir = 1;
|
|
for (first = 1;; first = 0) {
|
|
cp = buf;
|
|
if (read(rem, cp, 1) <= 0)
|
|
return;
|
|
if (*cp++ == '\n')
|
|
SCREWUP("unexpected <newline>");
|
|
do {
|
|
if (read(rem, &ch, sizeof(ch)) != sizeof(ch))
|
|
SCREWUP("lost connection");
|
|
*cp++ = ch;
|
|
} while (cp < &buf[BUFSIZ - 1] && ch != '\n');
|
|
*cp = 0;
|
|
|
|
if (buf[0] == '\01' || buf[0] == '\02') {
|
|
if (iamremote == 0)
|
|
(void)write(STDERR_FILENO,
|
|
buf + 1, strlen(buf + 1));
|
|
if (buf[0] == '\02')
|
|
exit(1);
|
|
++errs;
|
|
continue;
|
|
}
|
|
if (buf[0] == 'E') {
|
|
(void)write(rem, "", 1);
|
|
return;
|
|
}
|
|
|
|
if (ch == '\n')
|
|
*--cp = 0;
|
|
|
|
cp = buf;
|
|
if (*cp == 'T') {
|
|
setimes++;
|
|
cp++;
|
|
mtime.tv_sec = strtol(cp, &cp, 10);
|
|
if (!cp || *cp++ != ' ')
|
|
SCREWUP("mtime.sec not delimited");
|
|
mtime.tv_usec = strtol(cp, &cp, 10);
|
|
if (!cp || *cp++ != ' ')
|
|
SCREWUP("mtime.usec not delimited");
|
|
atime.tv_sec = strtol(cp, &cp, 10);
|
|
if (!cp || *cp++ != ' ')
|
|
SCREWUP("atime.sec not delimited");
|
|
atime.tv_usec = strtol(cp, &cp, 10);
|
|
if (!cp || *cp++ != '\0')
|
|
SCREWUP("atime.usec not delimited");
|
|
(void)write(rem, "", 1);
|
|
continue;
|
|
}
|
|
if (*cp != 'C' && *cp != 'D') {
|
|
/*
|
|
* Check for the case "rcp remote:foo\* local:bar".
|
|
* In this case, the line "No match." can be returned
|
|
* by the shell before the rcp command on the remote is
|
|
* executed so the ^Aerror_message convention isn't
|
|
* followed.
|
|
*/
|
|
if (first) {
|
|
run_err("%s", cp);
|
|
exit(1);
|
|
}
|
|
SCREWUP("expected control record");
|
|
}
|
|
mode = 0;
|
|
for (++cp; cp < buf + 5; cp++) {
|
|
if (*cp < '0' || *cp > '7')
|
|
SCREWUP("bad mode");
|
|
mode = (mode << 3) | (*cp - '0');
|
|
}
|
|
if (*cp++ != ' ')
|
|
SCREWUP("mode not delimited");
|
|
|
|
for (size = 0; isdigit(*cp);)
|
|
size = size * 10 + (*cp++ - '0');
|
|
if (*cp++ != ' ')
|
|
SCREWUP("size not delimited");
|
|
if (targisdir) {
|
|
if (strlen(targ) + (*targ ? 1 : 0) + strlen(cp)
|
|
>= sizeof(path)) {
|
|
run_err("%s%s%s: name too long", targ,
|
|
*targ ? "/" : "", cp);
|
|
exit(1);
|
|
}
|
|
(void)snprintf(path, sizeof(path), "%s%s%s", targ,
|
|
*targ ? "/" : "", cp);
|
|
np = path;
|
|
} 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)
|
|
(void)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)
|
|
(void)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;
|
|
}
|
|
(void)write(rem, "", 1);
|
|
if ((bp = allocbuf(&buffer, ofd, BUFSIZ)) == NULL) {
|
|
(void)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;
|
|
do {
|
|
j = read(rem, cp, amt);
|
|
if (j <= 0) {
|
|
run_err("%s", j ? strerror(errno) :
|
|
"dropped connection");
|
|
exit(1);
|
|
}
|
|
amt -= j;
|
|
cp += j;
|
|
} while (amt > 0);
|
|
if (count == bp->cnt) {
|
|
/* Keep reading so we stay sync'd up. */
|
|
if (wrerr == NO) {
|
|
j = write(ofd, bp->buf, count);
|
|
if (j != (off_t)count) {
|
|
wrerr = YES;
|
|
wrerrno = j >= 0 ? EIO : errno;
|
|
}
|
|
}
|
|
count = 0;
|
|
cp = bp->buf;
|
|
}
|
|
}
|
|
if (count != 0 && wrerr == NO &&
|
|
(j = write(ofd, bp->buf, count)) != (off_t)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));
|
|
}
|
|
(void)close(ofd);
|
|
(void)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:
|
|
(void)write(rem, "", 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(rem, &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(rem, &ch, sizeof(ch)) != sizeof(ch))
|
|
lostconn(0);
|
|
*cp++ = ch;
|
|
} while (cp < &rbuf[BUFSIZ] && ch != '\n');
|
|
|
|
if (!iamremote)
|
|
(void)write(STDERR_FILENO, rbuf, cp - rbuf);
|
|
++errs;
|
|
if (resp == 1)
|
|
return (-1);
|
|
exit(1);
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
void
|
|
usage(void)
|
|
{
|
|
(void)fprintf(stderr, "%s\n%s\n",
|
|
"usage: rcp [-46p] file1 file2",
|
|
" rcp [-46pr] file ... directory");
|
|
exit(1);
|
|
}
|
|
|
|
#include <stdarg.h>
|
|
|
|
void
|
|
run_err(const char *fmt, ...)
|
|
{
|
|
static FILE *fp;
|
|
va_list ap;
|
|
|
|
++errs;
|
|
if (fp == NULL && !(fp = fdopen(rem, "w")))
|
|
return;
|
|
(void)fprintf(fp, "%c", 0x01);
|
|
(void)fprintf(fp, "rcp: ");
|
|
va_start(ap, fmt);
|
|
(void)vfprintf(fp, fmt, ap);
|
|
va_end(ap);
|
|
(void)fprintf(fp, "\n");
|
|
(void)fflush(fp);
|
|
|
|
if (!iamremote) {
|
|
va_start(ap, fmt);
|
|
vwarnx(fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
}
|