NetBSD-5.0.2/usr.bin/rdist/docmd.c
/* $NetBSD: docmd.c,v 1.27 2006/12/18 15:14:42 christos Exp $ */
/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)docmd.c 8.1 (Berkeley) 6/9/93";
#else
__RCSID("$NetBSD: docmd.c,v 1.27 2006/12/18 15:14:42 christos Exp $");
#endif
#endif /* not lint */
#include <sys/types.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <netdb.h>
#include <regex.h>
#include <setjmp.h>
#include <fcntl.h>
#include "defs.h"
FILE *lfp; /* log file for recording files updated */
struct subcmd *subcmds; /* list of sub-commands for current cmd */
jmp_buf env;
static int remerr = -1; /* Remote stderr */
static int makeconn(char *);
static int okname(char *);
static void closeconn(void);
static void cmptime(char *);
static void doarrow(char **,
struct namelist *, char *, struct subcmd *);
static void dodcolon(char **,
struct namelist *, char *, struct subcmd *);
static void notify(char *, char *, struct namelist *, time_t);
static void rcmptime(struct stat *);
/*
* Do the commands in cmds (initialized by yyparse).
*/
void
docmds(char **dhosts, int argc, char **argv)
{
struct cmd *c;
struct namelist *f;
char **cpp;
extern struct cmd *cmds;
signal(SIGHUP, cleanup);
signal(SIGINT, cleanup);
signal(SIGQUIT, cleanup);
signal(SIGTERM, cleanup);
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(char **filev, struct namelist *files, char *rhost, struct subcmd *cmds)
{
struct namelist *f;
struct subcmd *sc;
char **cpp;
int n;
int volatile ddir;
int volatile opts;
opts = options;
if (debug)
printf("doarrow(%lx, %s, %lx)\n",
(long)files, rhost, (long)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;
signal(SIGPIPE, lostconn);
if (!makeconn(rhost))
return;
if ((lfp = fopen(tempfile, "w")) == NULL) {
fatal("cannot open %s\n", tempfile);
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;
if (!nflag && lfp)
(void) fclose(lfp);
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);
if (lfp)
(void) fclose(lfp);
lfp = NULL;
}
for (sc = cmds; sc != NULL; sc = sc->sc_next)
if (sc->sc_type == NOTIFY)
notify(tempfile, rhost, sc->sc_args, 0);
if (!nflag) {
for (; ihead != NULL; ihead = ihead->nextp) {
free(ihead);
if ((opts & IGNLNKS) || ihead->count == 0)
continue;
if (lfp)
dolog(lfp, "%s: Warning: missing links\n",
ihead->pathname);
}
}
}
/*
* Create a connection to the rdist server on the machine rhost.
*/
static int
makeconn(char *rhost)
{
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 = strchr(rhost, '@');
if (cp != NULL) {
char c = *cp;
*cp = '\0';
if (strlcpy(tuser, rhost, sizeof(tuser)) >= sizeof(tuser)) {
*cp = c;
return(0);
}
*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, sizeof(buf), "%s -Server%s", _PATH_RDIST,
qflag ? " -q" : "");
if (port < 0) {
struct servent *sp;
if ((sp = getservbyname("shell", "tcp")) == NULL)
fatal("shell/tcp: unknown service");
port = sp->s_port;
}
if (debug) {
printf("port = %d, luser = %s, ruser = %s\n", ntohs(port), user, ruser);
printf("buf = %s\n", buf);
}
fflush(stdout);
seteuid(0);
rem = rcmd(&rhost, port, user, ruser, buf, &remerr);
seteuid(userid);
if (rem < 0)
return(0);
cp = buf;
if (read(rem, cp, 1) != 1)
lostconn(0);
if (*cp == 'V') {
do {
if (read(rem, cp, 1) != 1)
lostconn(0);
} while (*cp++ != '\n' && cp < &buf[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");
error("got unexpected input:");
do {
error("%c", *cp);
} while (*cp != '\n' && read(rem, cp, 1) == 1);
}
closeconn();
return(0);
}
/*
* Signal end of previous connection.
*/
static void
closeconn(void)
{
if (debug)
printf("closeconn()\n");
if (rem >= 0) {
if (write(rem, "\2\n", 2) < 0 && debug)
printf("write failed on fd %d: %s\n", rem,
strerror(errno));
(void) close(rem);
(void) close(remerr);
rem = -1;
remerr = -1;
}
}
void
/*ARGSUSED*/
lostconn(int signo __unused)
{
char buf[BUFSIZ];
int nr = -1;
if (remerr != -1)
if (ioctl(remerr, FIONREAD, &nr) != -1) {
if (nr >= sizeof(buf))
nr = sizeof(buf) - 1;
if ((nr = read(remerr, buf, nr)) > 0) {
buf[nr] = '\0';
if (buf[nr - 1] == '\n')
buf[--nr] = '\0';
}
}
if (nr <= 0)
(void) strlcpy(buf, "lost connection", sizeof(buf));
if (iamremote)
cleanup(0);
if (lfp)
dolog(lfp, "rdist: %s\n", buf);
else
error("%s\n", buf);
longjmp(env, 1);
}
static int
okname(char *name)
{
char *cp = name;
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(char **filev, struct namelist *files, char *stamp, struct subcmd *cmds)
{
struct subcmd *sc;
struct namelist *f;
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: %lu\n", stamp, (u_long)stb.st_mtime);
subcmds = cmds;
lastmod = stb.st_mtime;
if (nflag || (options & VERIFY))
tfp = NULL;
else {
if ((tfp = fopen(tempfile, "w")) == NULL) {
error("%s: %s\n", tempfile, strerror(errno));
return;
}
(void) gettimeofday(&tv[0], (struct timezone *)0);
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(tempfile, NULL, sc->sc_args, lastmod);
}
/*
* Compare the mtime of file to the list of time stamps.
*/
static void
cmptime(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, 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)
dolog(tfp, "new: %s\n", name);
}
static void
rcmptime(struct stat *st)
{
DIR *d;
struct dirent *dp;
char *cp;
char *otp;
int len;
if (debug)
printf("rcmptime(%lx)\n", (long)st);
if ((d = opendir(target)) == NULL) {
error("%s: %s\n", target, strerror(errno));
return;
}
otp = tp;
len = tp - target;
while ((dp = readdir(d)) != NULL) {
if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
continue;
if (len + 1 + strlen(dp->d_name) >= BUFSIZ - 1) {
error("%s/%s: Name too long\n", target, dp->d_name);
continue;
}
tp = otp;
*tp++ = '/';
cp = dp->d_name;
while ((*tp++ = *cp++) != 0)
;
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(char *file, char *rhost, struct namelist *to, time_t lmod)
{
int fd, len;
struct stat stb;
FILE *pf;
char *cp, *nrhost = rhost;
if ((options & VERIFY) || to == NULL)
return;
/* strip any leading user@ prefix from rhost */
if (rhost && (cp = strchr(rhost, '@')) != NULL)
nrhost = cp + 1;
if (!qflag) {
printf("notify ");
if (rhost)
printf("@%s ", nrhost);
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, nrhost);
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, nrhost);
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)
if (fwrite(buf, 1, len, pf) < 1)
error("%s: %s\n", file, strerror(errno));
(void) close(fd);
(void) pclose(pf);
}
/*
* Return true if name is in the list.
*/
int
inlist(struct namelist *list, char *file)
{
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(char *file)
{
struct subcmd *sc;
struct namelist *nl;
int err;
regex_t s;
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;
}
if ((err = regcomp(&s, nl->n_name, 0)) != 0) {
char ebuf[BUFSIZ];
(void) regerror(err, &s, ebuf, sizeof(ebuf));
error("%s: %s\n", nl->n_name, ebuf);
}
if (regexec(&s, file, 0, NULL, 0) == 0) {
regfree(&s);
return(1);
}
regfree(&s);
}
}
return(0);
}
char *
colon(char *cp)
{
while (*cp) {
if (*cp == ':')
return(cp);
if (*cp == '/')
return(0);
cp++;
}
return(0);
}