/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "defs.h"
#include <string.h>
#include <setjmp.h>
#include <netdb.h>
#include <signal.h>
#include <krb5defs.h>
#ifndef RDIST
#ifdef SYSV
/*
* Historically, the rdist program has had the following hard-coded
* pathname. Some operating systems attempt to "improve" the
* directory layout, in the process re-locating the rdist binary
* to some other location. However, the first original implementation
* sets a standard of sorts. In order to interoperate with other
* systems, our implementation must do two things: It must provide
* the an rdist binary at the pathname below, and it must use this
* pathname when executing rdist on remote systems via the rcmd()
* library. Thus the hard-coded path name below can never be changed.
*/
#endif /* SYSV */
#define RDIST "/usr/ucb/rdist"
#endif
FILE *lfp; /* log file for recording files updated */
struct subcmd *subcmds; /* list of sub-commands for current cmd */
jmp_buf env;
void cleanup();
void lostconn();
static int init_service(int);
static struct servent *sp;
static void notify(char *file, char *rhost, struct namelist *to, time_t lmod);
static void rcmptime(struct stat *st);
static void cmptime(char *name);
static void dodcolon(char **filev, struct namelist *files, char *stamp,
struct subcmd *cmds);
static void closeconn(void);
static void doarrow(char **filev, struct namelist *files, char *rhost,
struct subcmd *cmds);
static int makeconn(char *rhost);
static int okname(register char *name);
#ifdef SYSV
#include <libgen.h>
static char *recomp;
static char *errstring = "regcmp failed for some unknown reason";
char *
re_comp(s)
char *s;
{
if ((int)recomp != 0)
free(recomp);
recomp = regcmp(s, (char *)0);
if (recomp == NULL)
return (errstring);
else
return ((char *)0);
}
static int
re_exec(s)
char *s;
{
if ((int)recomp == 0)
return (-1);
if (regex(recomp, s) == NULL)
return (0);
else
return (1);
}
#endif /* SYSV */
/*
* Do the commands in cmds (initialized by yyparse).
*/
void
docmds(dhosts, argc, argv)
char **dhosts;
int argc;
char **argv;
{
register struct cmd *c;
register struct namelist *f;
register char **cpp;
extern struct cmd *cmds;
/* protect backgrounded rdist */
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
(void) signal(SIGINT, cleanup);
/* ... and running via nohup(1) */
if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
(void) signal(SIGHUP, cleanup);
if (signal(SIGQUIT, SIG_IGN) != SIG_IGN)
(void) signal(SIGQUIT, cleanup);
(void) signal(SIGTERM, cleanup);
if (debug)
if (!cmds)
printf("docmds: cmds == NULL\n");
else {
printf("docmds: cmds ");
prcmd(cmds);
}
for (c = cmds; c != NULL; c = c->c_next) {
if (dhosts != NULL && *dhosts != NULL) {
for (cpp = dhosts; *cpp; cpp++)
if (strcmp(c->c_name, *cpp) == 0)
goto fndhost;
continue;
}
fndhost:
if (argc) {
for (cpp = argv; *cpp; cpp++) {
if (c->c_label != NULL &&
strcmp(c->c_label, *cpp) == 0) {
cpp = NULL;
goto found;
}
for (f = c->c_files; f != NULL; f = f->n_next)
if (strcmp(f->n_name, *cpp) == 0)
goto found;
}
continue;
} else
cpp = NULL;
found:
switch (c->c_type) {
case ARROW:
doarrow(cpp, c->c_files, c->c_name, c->c_cmds);
break;
case DCOLON:
dodcolon(cpp, c->c_files, c->c_name, c->c_cmds);
break;
default:
fatal("illegal command type %d\n", c->c_type);
}
}
closeconn();
}
/*
* Process commands for sending files to other machines.
*/
static void
doarrow(filev, files, rhost, cmds)
char **filev;
struct namelist *files;
char *rhost;
struct subcmd *cmds;
{
register struct namelist *f;
register struct subcmd *sc;
register char **cpp;
int n, ddir, opts = options;
if (debug)
printf("doarrow(%x, %s, %x)\n", files, rhost, cmds);
if (files == NULL) {
error("no files to be updated\n");
return;
}
subcmds = cmds;
ddir = files->n_next != NULL; /* destination is a directory */
if (nflag)
printf("updating host %s\n", rhost);
else {
if (setjmp(env))
goto done;
(void) signal(SIGPIPE, lostconn);
if (!makeconn(rhost))
return;
if (!nflag)
if ((lfp = fopen(Tmpfile, "w")) == NULL) {
fatal("cannot open %s\n", Tmpfile);
exit(1);
}
}
for (f = files; f != NULL; f = f->n_next) {
if (filev) {
for (cpp = filev; *cpp; cpp++)
if (strcmp(f->n_name, *cpp) == 0)
goto found;
continue;
}
found:
n = 0;
for (sc = cmds; sc != NULL; sc = sc->sc_next) {
if (sc->sc_type != INSTALL)
continue;
n++;
install(f->n_name, sc->sc_name,
sc->sc_name == NULL ? 0 : ddir, sc->sc_options);
opts = sc->sc_options;
}
if (n == 0)
install(f->n_name, NULL, 0, options);
}
done:
if (!nflag) {
(void) signal(SIGPIPE, cleanup);
(void) fclose(lfp);
lfp = NULL;
}
for (sc = cmds; sc != NULL; sc = sc->sc_next)
if (sc->sc_type == NOTIFY)
notify(Tmpfile, rhost, sc->sc_args, 0);
if (!nflag) {
(void) unlink(Tmpfile);
for (; ihead != NULL; ihead = ihead->nextp) {
free(ihead);
if ((opts & IGNLNKS) || ihead->count == 0)
continue;
log(lfp, "%s: Warning: missing links\n",
ihead->pathname);
}
}
}
static int
init_service(int krb5flag)
{
boolean_t success = B_FALSE;
if (krb5flag > 0) {
if ((sp = getservbyname("kshell", "tcp")) == NULL) {
fatal("kshell/tcp: unknown service");
(void) fprintf(stderr,
gettext("trying shell/tcp service...\n"));
} else {
success = B_TRUE;
}
} else {
if ((sp = getservbyname("shell", "tcp")) == NULL) {
fatal("shell/tcp: unknown service");
exit(1);
} else {
success = B_TRUE;
}
}
return (success);
}
/*
* Create a connection to the rdist server on the machine rhost.
*/
static int
makeconn(rhost)
char *rhost;
{
register char *ruser, *cp;
static char *cur_host = NULL;
static int port = -1;
char tuser[20];
int n;
extern char user[];
if (debug)
printf("makeconn(%s)\n", rhost);
if (cur_host != NULL && rem >= 0) {
if (strcmp(cur_host, rhost) == 0)
return (1);
closeconn();
}
cur_host = rhost;
cp = index(rhost, '@');
if (cp != NULL) {
char c = *cp;
*cp = '\0';
strncpy(tuser, rhost, sizeof (tuser)-1);
*cp = c;
rhost = cp + 1;
ruser = tuser;
if (*ruser == '\0')
ruser = user;
else if (!okname(ruser))
return (0);
} else
ruser = user;
if (!qflag)
printf("updating host %s\n", rhost);
(void) snprintf(buf, RDIST_BUFSIZ, "%s%s -Server%s",
encrypt_flag ? "-x " : "", RDIST, qflag ? " -q" : "");
if (port < 0) {
if (debug_port == 0) {
if ((retval = (int)init_service(krb5auth_flag)) == 0) {
krb5auth_flag = encrypt_flag = 0;
(void) init_service(krb5auth_flag);
}
port = sp->s_port;
} else {
port = debug_port;
}
}
if (debug) {
printf("port = %d, luser = %s, ruser = %s\n", ntohs(port),
user, ruser);
printf("buf = %s\n", buf);
}
fflush(stdout);
if (krb5auth_flag > 0) {
if ((encrypt_flag > 0) && (!krb5_privacy_allowed())) {
(void) fprintf(stderr, gettext("rdist: Encryption "
" not supported.\n"));
exit(1);
}
authopts = AP_OPTS_MUTUAL_REQUIRED;
status = kcmd(&rem, &rhost, port,
user, ruser,
buf, 0, "host", krb_realm,
bsd_context,
&auth_context,
&cred,
0, /* No need for sequence number */
0, /* No need for server seq # */
authopts,
1, /* Always set anyport */
&kcmd_proto);
if (status) {
/*
* If new protocol requested, we dont
* fallback to less secure ones.
*/
if (kcmd_proto == KCMD_NEW_PROTOCOL) {
(void) fprintf(stderr, gettext("rdist: kcmdv2 "
"to host %s failed - %s\n"
"Fallback to normal rdist denied."),
host, error_message(status));
exit(1);
}
/* check NO_TKT_FILE or equivalent... */
if (status != -1) {
(void) fprintf(stderr, gettext("rdist: "
"kcmd to host %s failed - %s\n"
"trying normal rdist...\n\n"),
host, error_message(status));
} else {
(void) fprintf(stderr,
gettext("trying normal rdist...\n"));
}
/*
* kcmd() failed, so we now fallback to normal rdist
*/
krb5auth_flag = encrypt_flag = 0;
(void) init_service(krb5auth_flag);
port = sp->s_port;
goto do_rcmd;
}
#ifdef DEBUG
else {
(void) fprintf(stderr, gettext("Kerberized rdist "
"session, port %d in use "), port);
if (kcmd_proto == KCMD_OLD_PROTOCOL)
(void) fprintf(stderr,
gettext("[kcmd ver.1].\n"));
else
(void) fprintf(stderr,
gettext("[kcmd ver.2].\n"));
}
#endif /* DEBUG */
session_key = &cred->keyblock;
if (kcmd_proto == KCMD_NEW_PROTOCOL) {
status = krb5_auth_con_getlocalsubkey(bsd_context,
auth_context,
&session_key);
if (status) {
com_err("rdist", status,
"determining subkey for session");
exit(1);
}
if (!session_key) {
com_err("rdist", 0,
"no subkey negotiated for connection");
exit(1);
}
}
eblock.crypto_entry = session_key->enctype;
eblock.key = (krb5_keyblock *)session_key;
init_encrypt(encrypt_flag, bsd_context, kcmd_proto, &desinbuf,
&desoutbuf, CLIENT, &eblock);
if (encrypt_flag > 0) {
char *s = gettext("This rdist session is using "
"encryption for all data transmissions.\r\n");
(void) write(2, s, strlen(s));
}
}
else
do_rcmd:
{
rem = rcmd_af(&rhost, port, user, ruser, buf, 0, AF_INET6);
}
if (rem < 0)
return (0);
cp = buf;
if (desread(rem, cp, 1, 0) != 1)
lostconn();
if (*cp == 'V') {
do {
if (desread(rem, cp, 1, 0) != 1)
lostconn();
} while (*cp++ != '\n' && cp < &buf[RDIST_BUFSIZ]);
*--cp = '\0';
cp = buf;
n = 0;
while (*cp >= '0' && *cp <= '9')
n = (n * 10) + (*cp++ - '0');
if (*cp == '\0' && n == VERSION)
return (1);
error("connection failed: version numbers don't match"
" (local %d, remote %d)\n", VERSION, n);
} else {
error("connection failed: version numbers don't match\n");
}
closeconn();
return (0);
}
/*
* Signal end of previous connection.
*/
static void
closeconn(void)
{
if (debug)
printf("closeconn()\n");
if (rem >= 0) {
(void) deswrite(rem, "\2\n", 2, 0);
(void) close(rem);
rem = -1;
}
}
void
lostconn()
{
if (iamremote)
cleanup();
log(lfp, "rdist: lost connection\n");
longjmp(env, 1);
}
static int
okname(name)
register char *name;
{
register char *cp = name;
register int c;
do {
c = *cp;
if (c & 0200)
goto bad;
if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-')
goto bad;
cp++;
} while (*cp);
return (1);
bad:
error("invalid user name %s\n", name);
return (0);
}
time_t lastmod;
FILE *tfp;
extern char target[], *tp;
/*
* Process commands for comparing files to time stamp files.
*/
static void
dodcolon(filev, files, stamp, cmds)
char **filev;
struct namelist *files;
char *stamp;
struct subcmd *cmds;
{
register struct subcmd *sc;
register struct namelist *f;
register char **cpp;
struct timeval tv[2];
struct stat stb;
if (debug)
printf("dodcolon()\n");
if (files == NULL) {
error("no files to be updated\n");
return;
}
if (stat(stamp, &stb) < 0) {
error("%s: %s\n", stamp, strerror(errno));
return;
}
if (debug)
printf("%s: %d\n", stamp, stb.st_mtime);
subcmds = cmds;
lastmod = stb.st_mtime;
if (nflag || (options & VERIFY))
tfp = NULL;
else {
if ((tfp = fopen(Tmpfile, "w")) == NULL) {
error("%s: %s\n", stamp, strerror(errno));
return;
}
(void) gettimeofday(&tv[0], (struct timezone *)NULL);
tv[1] = tv[0];
(void) utimes(stamp, tv);
}
for (f = files; f != NULL; f = f->n_next) {
if (filev) {
for (cpp = filev; *cpp; cpp++)
if (strcmp(f->n_name, *cpp) == 0)
goto found;
continue;
}
found:
tp = NULL;
cmptime(f->n_name);
}
if (tfp != NULL)
(void) fclose(tfp);
for (sc = cmds; sc != NULL; sc = sc->sc_next)
if (sc->sc_type == NOTIFY)
notify(Tmpfile, NULL, sc->sc_args, lastmod);
if (!nflag && !(options & VERIFY))
(void) unlink(Tmpfile);
}
/*
* Compare the mtime of file to the list of time stamps.
*/
static void
cmptime(name)
char *name;
{
struct stat stb;
if (debug)
printf("cmptime(%s)\n", name);
if (except(name))
return;
if (nflag) {
printf("comparing dates: %s\n", name);
return;
}
/*
* first time cmptime() is called?
*/
if (tp == NULL) {
if (exptilde(target, RDIST_BUFSIZ, name) == NULL)
return;
tp = name = target;
while (*tp)
tp++;
}
if (access(name, 4) < 0 || stat(name, &stb) < 0) {
error("%s: %s\n", name, strerror(errno));
return;
}
switch (stb.st_mode & S_IFMT) {
case S_IFREG:
break;
case S_IFDIR:
rcmptime(&stb);
return;
default:
error("%s: not a plain file\n", name);
return;
}
if (stb.st_mtime > lastmod)
log(tfp, "new: %s\n", name);
}
static void
rcmptime(st)
struct stat *st;
{
register DIR *d;
register struct dirent *dp;
register char *cp;
char *otp;
int len;
if (debug)
printf("rcmptime(%x)\n", st);
if ((d = opendir(target)) == NULL) {
error("%s: %s\n", target, strerror(errno));
return;
}
otp = tp;
len = tp - target;
while (dp = readdir(d)) {
if ((strcmp(dp->d_name, ".") == 0) ||
(strcmp(dp->d_name, "..") == 0))
continue;
if (len + 1 + strlen(dp->d_name) >= RDIST_BUFSIZ - 1) {
error("%s/%s: Name too long\n", target, dp->d_name);
continue;
}
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;
FILE *pf, *popen();
struct stat stb;
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.
*/
pf = popen(MAILCMD, "w");
if (pf == NULL) {
error("notify: \"%s\" failed\n", MAILCMD);
(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, RDIST_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) == 0)
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;
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) == 0)
return (1);
continue;
}
re_comp(nl->n_name);
if (re_exec(file) > 0)
return (1);
}
}
return (0);
}
char *
colon(cp)
register char *cp;
{
while (*cp) {
if (*cp == ':')
return (cp);
if (*cp == '/')
return (0);
cp++;
}
return (0);
}