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fb9e3ade6c
possibility of a security hole. It now does what rdist-6 does, and calls /usr/bin/rsh if not running as root. There are NO protocol changes, this is 100% compatable with the old rdist, except that it does not need setuid root privs. However, there are some minor differences to the base rdist-6 code in that if it is being run by root, it will call rcmd(3) directly rather than piping everything through rsh(1). This is a little more efficient as it doesn't involve context switching on pipe reads/writes. Also, the -P option was added from rdist-6.1.2, which allows an alternative rsh program to be specified, such as ssh. Note that it requires the fixes to the ssh port to disable the unconditional USE_PIPES option that was recently added. The rcmd(3) optimisation is disabled if a non-rsh program is speficied.
695 lines
14 KiB
C
695 lines
14 KiB
C
/*
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* Copyright (c) 1983, 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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#ifndef lint
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/*static char sccsid[] = "From: @(#)docmd.c 8.1 (Berkeley) 6/9/93";*/
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static const char rcsid[] =
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"$Id: docmd.c,v 1.4 1996/07/12 04:00:13 nate Exp $";
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#endif /* not lint */
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#include "defs.h"
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#include <setjmp.h>
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#include <netdb.h>
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#include <regex.h>
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FILE *lfp; /* log file for recording files updated */
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struct subcmd *subcmds; /* list of sub-commands for current cmd */
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jmp_buf env;
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static int makeconn __P((char *));
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static int okname __P((char *));
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static void closeconn __P((void));
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static void cmptime __P((char *));
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static void doarrow __P((char **,
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struct namelist *, char *, struct subcmd *));
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static void dodcolon __P((char **,
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struct namelist *, char *, struct subcmd *));
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static void notify __P((char *, char *, struct namelist *, time_t));
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static void rcmptime __P((struct stat *));
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static int remotecmd __P((char *, char *, char *, char *));
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/*
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* Do the commands in cmds (initialized by yyparse).
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*/
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void
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docmds(dhosts, argc, argv)
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char **dhosts;
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int argc;
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char **argv;
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{
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register struct cmd *c;
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register struct namelist *f;
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register char **cpp;
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extern struct cmd *cmds;
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signal(SIGHUP, cleanup);
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signal(SIGINT, cleanup);
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signal(SIGQUIT, cleanup);
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signal(SIGTERM, cleanup);
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for (c = cmds; c != NULL; c = c->c_next) {
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if (dhosts != NULL && *dhosts != NULL) {
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for (cpp = dhosts; *cpp; cpp++)
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if (strcmp(c->c_name, *cpp) == 0)
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goto fndhost;
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continue;
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}
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fndhost:
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if (argc) {
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for (cpp = argv; *cpp; cpp++) {
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if (c->c_label != NULL &&
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strcmp(c->c_label, *cpp) == 0) {
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cpp = NULL;
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goto found;
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}
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for (f = c->c_files; f != NULL; f = f->n_next)
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if (strcmp(f->n_name, *cpp) == 0)
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goto found;
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}
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continue;
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} else
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cpp = NULL;
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found:
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switch (c->c_type) {
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case ARROW:
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doarrow(cpp, c->c_files, c->c_name, c->c_cmds);
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break;
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case DCOLON:
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dodcolon(cpp, c->c_files, c->c_name, c->c_cmds);
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break;
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default:
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fatal("illegal command type %d\n", c->c_type);
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}
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}
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closeconn();
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}
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/*
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* Process commands for sending files to other machines.
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*/
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static void
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doarrow(filev, files, rhost, cmds)
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char **filev;
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struct namelist *files;
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char *rhost;
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struct subcmd *cmds;
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{
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register struct namelist *f;
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register struct subcmd *sc;
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register char **cpp;
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int n, ddir, opts = options;
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if (debug)
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printf("doarrow(%p, %s, %p)\n", files, rhost, cmds);
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if (files == NULL) {
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error("no files to be updated\n");
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return;
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}
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subcmds = cmds;
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ddir = files->n_next != NULL; /* destination is a directory */
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if (nflag)
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printf("updating host %s\n", rhost);
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else {
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if (setjmp(env))
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goto done;
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signal(SIGPIPE, lostconn);
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if (!makeconn(rhost))
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return;
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if ((lfp = fopen(tempfile, "w")) == NULL) {
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fatal("cannot open %s\n", tempfile);
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exit(1);
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}
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}
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for (f = files; f != NULL; f = f->n_next) {
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if (filev) {
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for (cpp = filev; *cpp; cpp++)
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if (strcmp(f->n_name, *cpp) == 0)
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goto found;
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if (!nflag)
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(void) fclose(lfp);
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continue;
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}
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found:
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n = 0;
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for (sc = cmds; sc != NULL; sc = sc->sc_next) {
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if (sc->sc_type != INSTALL)
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continue;
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n++;
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install(f->n_name, sc->sc_name,
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sc->sc_name == NULL ? 0 : ddir, sc->sc_options);
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opts = sc->sc_options;
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}
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if (n == 0)
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install(f->n_name, NULL, 0, options);
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}
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done:
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if (!nflag) {
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(void) signal(SIGPIPE, cleanup);
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(void) fclose(lfp);
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lfp = NULL;
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}
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for (sc = cmds; sc != NULL; sc = sc->sc_next)
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if (sc->sc_type == NOTIFY)
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notify(tempfile, rhost, sc->sc_args, 0);
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if (!nflag) {
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(void) unlink(tempfile);
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for (; ihead != NULL; ihead = ihead->nextp) {
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free(ihead);
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if ((opts & IGNLNKS) || ihead->count == 0)
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continue;
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log(lfp, "%s: Warning: missing links\n",
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ihead->pathname);
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}
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}
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}
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static int remotecmd(rhost, luser, ruser, cmd)
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char *rhost;
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char *luser, *ruser;
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char *cmd;
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{
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int desc;
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static int port = -1;
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if (debug) {
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printf("local user = %s remote user = %s\n", luser, ruser);
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printf("Remote command = '%s'\n", cmd);
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}
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(void) fflush(stdout);
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(void) fflush(stderr);
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(void) signal(SIGALRM, cleanup);
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(void) alarm(RTIMEOUT);
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if (geteuid() == 0 && strcmp(path_rsh, _PATH_RSH) == 0) {
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if (debug)
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printf("I am root, therefore direct rcmd\n");
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(void) signal(SIGPIPE, cleanup);
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if (port < 0) {
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struct servent *sp;
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if ((sp = getservbyname("shell", "tcp")) == NULL)
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fatal("shell/tcp: unknown service");
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port = sp->s_port;
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}
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desc = rcmd(&rhost, port, luser, ruser, cmd, 0);
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} else {
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if (debug)
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printf("Remote shell command = '%s'\n", path_rsh);
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(void) signal(SIGPIPE, SIG_IGN);
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desc = rshrcmd(&rhost, -1, luser, ruser, cmd, 0);
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if (desc > 0)
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(void) signal(SIGPIPE, cleanup);
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}
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(void) alarm(0);
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return(desc);
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}
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/*
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* Create a connection to the rdist server on the machine rhost.
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*/
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static int
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makeconn(rhost)
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char *rhost;
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{
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register char *ruser, *cp;
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static char *cur_host = NULL;
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static int port = -1;
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char tuser[20];
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int n;
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extern char user[];
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#if defined(DIRECT_RCMD)
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extern int userid;
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#endif
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if (debug)
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printf("makeconn(%s)\n", rhost);
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if (cur_host != NULL && rem >= 0) {
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if (strcmp(cur_host, rhost) == 0)
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return(1);
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closeconn();
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}
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cur_host = rhost;
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cp = index(rhost, '@');
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if (cp != NULL) {
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char c = *cp;
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*cp = '\0';
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strncpy(tuser, rhost, sizeof(tuser)-1);
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*cp = c;
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rhost = cp + 1;
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ruser = tuser;
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if (*ruser == '\0')
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ruser = user;
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else if (!okname(ruser))
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return(0);
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} else
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ruser = user;
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if (!qflag)
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printf("updating host %s\n", rhost);
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(void) snprintf(buf, sizeof(buf), "%s -Server%s",
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_PATH_RDIST, qflag ? " -q" : "");
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if (port < 0) {
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struct servent *sp;
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if ((sp = getservbyname("shell", "tcp")) == NULL)
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fatal("shell/tcp: unknown service");
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port = sp->s_port;
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}
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if (debug) {
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printf("port = %d, luser = %s, ruser = %s\n", ntohs(port), user, ruser);
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printf("buf = %s\n", buf);
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}
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fflush(stdout);
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#if defined(DIRECT_RCMD)
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seteuid(0);
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rem = rcmd(&rhost, port, user, ruser, buf, 0);
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seteuid(userid);
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#else
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rem = remotecmd(rhost, user, ruser, buf);
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#endif
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if (rem < 0)
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return(0);
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cp = buf;
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if (read(rem, cp, 1) != 1)
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lostconn(0);
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if (*cp == 'V') {
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do {
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if (read(rem, cp, 1) != 1)
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lostconn(0);
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} while (*cp++ != '\n' && cp < &buf[BUFSIZ]);
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*--cp = '\0';
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cp = buf;
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n = 0;
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while (*cp >= '0' && *cp <= '9')
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n = (n * 10) + (*cp++ - '0');
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if (*cp == '\0' && n == VERSION)
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return(1);
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error("connection failed: version numbers don't match (local %d, remote %d)\n", VERSION, n);
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} else {
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error("connection failed: version numbers don't match\n");
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error("got unexpected input:");
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do {
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error("%c", *cp);
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} while (*cp != '\n' && read(rem, cp, 1) == 1);
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}
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closeconn();
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return(0);
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}
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/*
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* Signal end of previous connection.
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*/
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static void
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closeconn()
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{
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if (debug)
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printf("closeconn()\n");
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if (rem >= 0) {
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(void) write(rem, "\2\n", 2);
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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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lostconn(signo)
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int signo;
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{
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if (iamremote)
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cleanup(0);
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log(lfp, "rdist: lost connection\n");
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longjmp(env, 1);
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}
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static int
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okname(name)
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register char *name;
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{
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register char *cp = name;
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register int c;
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do {
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c = *cp;
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if (c & 0200)
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goto bad;
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if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-')
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goto bad;
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cp++;
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} while (*cp);
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return(1);
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bad:
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error("invalid user name %s\n", name);
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return(0);
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}
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time_t lastmod;
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FILE *tfp;
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extern char target[], *tp;
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/*
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* Process commands for comparing files to time stamp files.
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*/
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static void
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dodcolon(filev, files, stamp, cmds)
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char **filev;
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struct namelist *files;
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char *stamp;
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struct subcmd *cmds;
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{
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register struct subcmd *sc;
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register struct namelist *f;
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register char **cpp;
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struct timeval tv[2];
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struct timezone tz;
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struct stat stb;
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if (debug)
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printf("dodcolon()\n");
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if (files == NULL) {
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error("no files to be updated\n");
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return;
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}
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if (stat(stamp, &stb) < 0) {
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error("%s: %s\n", stamp, strerror(errno));
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return;
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}
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if (debug)
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printf("%s: %ld\n", stamp, stb.st_mtime);
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subcmds = cmds;
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lastmod = stb.st_mtime;
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if (nflag || (options & VERIFY))
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tfp = NULL;
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else {
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if ((tfp = fopen(tempfile, "w")) == NULL) {
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error("%s: %s\n", stamp, strerror(errno));
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return;
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}
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(void) gettimeofday(&tv[0], &tz);
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tv[1] = tv[0];
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(void) utimes(stamp, tv);
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}
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for (f = files; f != NULL; f = f->n_next) {
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if (filev) {
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for (cpp = filev; *cpp; cpp++)
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if (strcmp(f->n_name, *cpp) == 0)
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goto found;
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continue;
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}
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found:
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tp = NULL;
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cmptime(f->n_name);
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}
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if (tfp != NULL)
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(void) fclose(tfp);
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for (sc = cmds; sc != NULL; sc = sc->sc_next)
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if (sc->sc_type == NOTIFY)
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notify(tempfile, NULL, sc->sc_args, lastmod);
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if (!nflag && !(options & VERIFY))
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(void) unlink(tempfile);
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}
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/*
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* Compare the mtime of file to the list of time stamps.
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*/
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static void
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cmptime(name)
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char *name;
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{
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struct stat stb;
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if (debug)
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printf("cmptime(%s)\n", name);
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if (except(name))
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return;
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if (nflag) {
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printf("comparing dates: %s\n", name);
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return;
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}
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/*
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* first time cmptime() is called?
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*/
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if (tp == NULL) {
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if (exptilde(target, name) == NULL)
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return;
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tp = name = target;
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while (*tp)
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tp++;
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}
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if (access(name, 4) < 0 || stat(name, &stb) < 0) {
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error("%s: %s\n", name, strerror(errno));
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return;
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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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rcmptime(&stb);
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return;
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default:
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error("%s: not a plain file\n", name);
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return;
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}
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if (stb.st_mtime > lastmod)
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log(tfp, "new: %s\n", name);
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}
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static void
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rcmptime(st)
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struct stat *st;
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{
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register DIR *d;
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register struct direct *dp;
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register char *cp;
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char *otp;
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int len;
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if (debug)
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printf("rcmptime(%p)\n", st);
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if ((d = opendir(target)) == NULL) {
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error("%s: %s\n", target, strerror(errno));
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return;
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}
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otp = tp;
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len = tp - target;
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while ((dp = readdir(d))) {
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if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
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continue;
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if (len + 1 + strlen(dp->d_name) >= BUFSIZ - 1) {
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error("%s/%s: Name too long\n", target, dp->d_name);
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continue;
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}
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tp = otp;
|
|
*tp++ = '/';
|
|
cp = dp->d_name;
|
|
while ((*tp++ = *cp++))
|
|
;
|
|
tp--;
|
|
cmptime(target);
|
|
}
|
|
closedir(d);
|
|
tp = otp;
|
|
*tp = '\0';
|
|
}
|
|
|
|
/*
|
|
* Notify the list of people the changes that were made.
|
|
* rhost == NULL if we are mailing a list of changes compared to at time
|
|
* stamp file.
|
|
*/
|
|
static void
|
|
notify(file, rhost, to, lmod)
|
|
char *file, *rhost;
|
|
register struct namelist *to;
|
|
time_t lmod;
|
|
{
|
|
register int fd, len;
|
|
struct stat stb;
|
|
FILE *pf;
|
|
|
|
if ((options & VERIFY) || to == NULL)
|
|
return;
|
|
if (!qflag) {
|
|
printf("notify ");
|
|
if (rhost)
|
|
printf("@%s ", rhost);
|
|
prnames(to);
|
|
}
|
|
if (nflag)
|
|
return;
|
|
|
|
if ((fd = open(file, 0)) < 0) {
|
|
error("%s: %s\n", file, strerror(errno));
|
|
return;
|
|
}
|
|
if (fstat(fd, &stb) < 0) {
|
|
error("%s: %s\n", file, strerror(errno));
|
|
(void) close(fd);
|
|
return;
|
|
}
|
|
if (stb.st_size == 0) {
|
|
(void) close(fd);
|
|
return;
|
|
}
|
|
/*
|
|
* Create a pipe to mailling program.
|
|
*/
|
|
(void) snprintf(buf, sizeof(buf), "%s -oi -t", _PATH_SENDMAIL);
|
|
pf = popen(buf, "w");
|
|
if (pf == NULL) {
|
|
error("notify: \"%s\" failed\n", _PATH_SENDMAIL);
|
|
(void) close(fd);
|
|
return;
|
|
}
|
|
/*
|
|
* Output the proper header information.
|
|
*/
|
|
fprintf(pf, "From: rdist (Remote distribution program)\n");
|
|
fprintf(pf, "To:");
|
|
if (!any('@', to->n_name) && rhost != NULL)
|
|
fprintf(pf, " %s@%s", to->n_name, rhost);
|
|
else
|
|
fprintf(pf, " %s", to->n_name);
|
|
to = to->n_next;
|
|
while (to != NULL) {
|
|
if (!any('@', to->n_name) && rhost != NULL)
|
|
fprintf(pf, ", %s@%s", to->n_name, rhost);
|
|
else
|
|
fprintf(pf, ", %s", to->n_name);
|
|
to = to->n_next;
|
|
}
|
|
putc('\n', pf);
|
|
if (rhost != NULL)
|
|
fprintf(pf, "Subject: files updated by rdist from %s to %s\n",
|
|
host, rhost);
|
|
else
|
|
fprintf(pf, "Subject: files updated after %s\n", ctime(&lmod));
|
|
putc('\n', pf);
|
|
|
|
while ((len = read(fd, buf, BUFSIZ)) > 0)
|
|
(void) fwrite(buf, 1, len, pf);
|
|
(void) close(fd);
|
|
(void) pclose(pf);
|
|
}
|
|
|
|
/*
|
|
* Return true if name is in the list.
|
|
*/
|
|
int
|
|
inlist(list, file)
|
|
struct namelist *list;
|
|
char *file;
|
|
{
|
|
register struct namelist *nl;
|
|
|
|
for (nl = list; nl != NULL; nl = nl->n_next)
|
|
if (!strcmp(file, nl->n_name))
|
|
return(1);
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* Return TRUE if file is in the exception list.
|
|
*/
|
|
int
|
|
except(file)
|
|
char *file;
|
|
{
|
|
register struct subcmd *sc;
|
|
register struct namelist *nl;
|
|
regex_t rx;
|
|
int val;
|
|
|
|
if (debug)
|
|
printf("except(%s)\n", file);
|
|
|
|
for (sc = subcmds; sc != NULL; sc = sc->sc_next) {
|
|
if (sc->sc_type != EXCEPT && sc->sc_type != PATTERN)
|
|
continue;
|
|
for (nl = sc->sc_args; nl != NULL; nl = nl->n_next) {
|
|
if (sc->sc_type == EXCEPT) {
|
|
if (!strcmp(file, nl->n_name))
|
|
return(1);
|
|
continue;
|
|
}
|
|
val = regcomp(&rx, nl->n_name,
|
|
REG_EXTENDED | REG_NOSUB);
|
|
if (!regexec(&rx, file, 0, 0, 0)) {
|
|
regfree(&rx);
|
|
return 1;
|
|
}
|
|
regfree(&rx);
|
|
}
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
char *
|
|
colon(cp)
|
|
register char *cp;
|
|
{
|
|
|
|
while (*cp) {
|
|
if (*cp == ':')
|
|
return(cp);
|
|
if (*cp == '/')
|
|
return(0);
|
|
cp++;
|
|
}
|
|
return(0);
|
|
}
|