| Current Path : /usr/src/crypto/heimdal/appl/rcp/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/crypto/heimdal/appl/rcp/rcp.c |
/*
* Copyright (c) 1983, 1990, 1992, 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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 "rcp_locl.h"
#include <getarg.h>
#define RSH_PROGRAM "rsh"
struct passwd *pwd;
uid_t userid;
int errs, remin, remout;
int pflag, iamremote, iamrecursive, targetshouldbedirectory;
int doencrypt, noencrypt;
int usebroken, usekrb4, usekrb5, forwardtkt;
char *port;
int eflag = 0;
#define CMDNEEDS 64
char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
int response (void);
void rsource (char *, struct stat *);
void sink (int, char *[]);
void source (int, char *[]);
void tolocal (int, char *[]);
void toremote (char *, int, char *[]);
int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout);
static int fflag, tflag;
static int version_flag, help_flag;
struct getargs args[] = {
{ NULL, '4', arg_flag, &usekrb4, "use Kerberos 4 authentication" },
{ NULL, '5', arg_flag, &usekrb5, "use Kerberos 5 authentication" },
{ NULL, 'F', arg_flag, &forwardtkt, "forward credentials" },
{ NULL, 'K', arg_flag, &usebroken, "use BSD authentication" },
{ NULL, 'P', arg_string, &port, "non-default port", "port" },
{ NULL, 'p', arg_flag, &pflag, "preserve file permissions" },
{ NULL, 'r', arg_flag, &iamrecursive, "recursive mode" },
{ NULL, 'x', arg_flag, &doencrypt, "use encryption" },
{ NULL, 'z', arg_flag, &noencrypt, "don't encrypt" },
{ NULL, 'd', arg_flag, &targetshouldbedirectory },
{ NULL, 'e', arg_flag, &eflag, "passed to rsh" },
{ NULL, 'f', arg_flag, &fflag },
{ NULL, 't', arg_flag, &tflag },
{ "version", 0, arg_flag, &version_flag },
{ "help", 0, arg_flag, &help_flag }
};
static void
usage (int ret)
{
arg_printusage (args,
sizeof(args) / sizeof(args[0]),
NULL,
"file1 file2|file... directory");
exit (ret);
}
int
main(int argc, char **argv)
{
char *targ;
int optind = 0;
setprogname(argv[0]);
if (getarg (args, sizeof(args) / sizeof(args[0]), argc, argv,
&optind))
usage (1);
if(help_flag)
usage(0);
if (version_flag) {
print_version (NULL);
return 0;
}
iamremote = (fflag || tflag);
argc -= optind;
argv += optind;
if ((pwd = getpwuid(userid = getuid())) == NULL)
errx(1, "unknown user %d", (int)userid);
remin = STDIN_FILENO; /* XXX */
remout = STDOUT_FILENO;
if (fflag) { /* Follow "protocol", send data. */
response();
if (setuid(userid) < 0)
errx(1, "setuid failed");
source(argc, argv);
exit(errs);
}
if (tflag) { /* Receive data. */
if (setuid(userid) < 0)
errx(1, "setuid failed");
sink(argc, argv);
exit(errs);
}
if (argc < 2)
usage(1);
if (argc > 2)
targetshouldbedirectory = 1;
remin = remout = -1;
/* Command to be executed on remote system using "rsh". */
snprintf(cmd, sizeof(cmd),
"rcp%s%s%s", iamrecursive ? " -r" : "",
pflag ? " -p" : "", targetshouldbedirectory ? " -d" : "");
signal(SIGPIPE, lostconn);
if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
toremote(targ, argc, argv);
else {
tolocal(argc, argv); /* Dest is local host. */
if (targetshouldbedirectory)
verifydir(argv[argc - 1]);
}
exit(errs);
}
void
toremote(char *targ, int argc, char **argv)
{
int i;
char *bp, *host, *src, *suser, *thost, *tuser;
*targ++ = 0;
if (*targ == 0)
targ = ".";
if ((thost = strchr(argv[argc - 1], '@'))) {
/* user@host */
*thost++ = 0;
tuser = argv[argc - 1];
if (*tuser == '\0')
tuser = NULL;
else if (!okname(tuser))
exit(1);
} else {
thost = argv[argc - 1];
tuser = NULL;
}
for (i = 0; i < argc - 1; i++) {
src = colon(argv[i]);
if (src) { /* remote to remote */
int ret;
*src++ = 0;
if (*src == 0)
src = ".";
host = strchr(argv[i], '@');
if (host) {
*host++ = '\0';
suser = argv[i];
if (*suser == '\0')
suser = pwd->pw_name;
else if (!okname(suser))
continue;
ret = asprintf(&bp,
"%s%s %s -l %s -n %s %s '%s%s%s:%s'",
_PATH_RSH, eflag ? " -e" : "",
host, suser, cmd, src,
tuser ? tuser : "", tuser ? "@" : "",
thost, targ);
} else {
ret = asprintf(&bp,
"exec %s%s %s -n %s %s '%s%s%s:%s'",
_PATH_RSH, eflag ? " -e" : "",
argv[i], cmd, src,
tuser ? tuser : "", tuser ? "@" : "",
thost, targ);
}
if (ret == -1)
err (1, "malloc");
susystem(bp, userid);
free(bp);
} else { /* local to remote */
if (remin == -1) {
if (asprintf(&bp, "%s -t %s", cmd, targ) == -1)
err (1, "malloc");
host = thost;
if (do_cmd(host, tuser, bp, &remin, &remout) < 0)
exit(1);
if (response() < 0)
exit(1);
free(bp);
if (setuid(userid) < 0)
errx(1, "setuid failed");
}
source(1, argv+i);
}
}
}
void
tolocal(int argc, char **argv)
{
int i;
char *bp, *host, *src, *suser;
for (i = 0; i < argc - 1; i++) {
int ret;
if (!(src = colon(argv[i]))) { /* Local to local. */
ret = asprintf(&bp, "exec %s%s%s %s %s", _PATH_CP,
iamrecursive ? " -PR" : "", pflag ? " -p" : "",
argv[i], argv[argc - 1]);
if (ret == -1)
err (1, "malloc");
if (susystem(bp, userid))
++errs;
free(bp);
continue;
}
*src++ = 0;
if (*src == 0)
src = ".";
if ((host = strchr(argv[i], '@')) == NULL) {
host = argv[i];
suser = pwd->pw_name;
} else {
*host++ = 0;
suser = argv[i];
if (*suser == '\0')
suser = pwd->pw_name;
else if (!okname(suser))
continue;
}
ret = asprintf(&bp, "%s -f %s", cmd, src);
if (ret == -1)
err (1, "malloc");
if (do_cmd(host, suser, bp, &remin, &remout) < 0) {
free(bp);
++errs;
continue;
}
free(bp);
sink(1, argv + argc - 1);
if (seteuid(0) < 0)
exit(1);
close(remin);
remin = remout = -1;
}
}
void
source(int argc, char **argv)
{
struct stat stb;
static BUF buffer;
BUF *bp;
off_t i;
int amt, fd, haderr, indx, result;
char *last, *name, buf[BUFSIZ];
for (indx = 0; indx < argc; ++indx) {
name = argv[indx];
if ((fd = open(name, O_RDONLY, 0)) < 0)
goto syserr;
if (fstat(fd, &stb)) {
syserr: run_err("%s: %s", name, strerror(errno));
goto next;
}
switch (stb.st_mode & S_IFMT) {
case S_IFREG:
break;
case S_IFDIR:
if (iamrecursive) {
rsource(name, &stb);
goto next;
}
/* FALLTHROUGH */
default:
run_err("%s: not a regular file", name);
goto next;
}
if ((last = strrchr(name, '/')) == NULL)
last = name;
else
++last;
if (pflag) {
/*
* Make it compatible with possible future
* versions expecting microseconds.
*/
snprintf(buf, sizeof(buf), "T%ld 0 %ld 0\n",
(long)stb.st_mtime,
(long)stb.st_atime);
write(remout, buf, strlen(buf));
if (response() < 0)
goto next;
}
#undef MODEMASK
#define MODEMASK (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO)
snprintf(buf, sizeof(buf), "C%04o %lu %s\n",
stb.st_mode & MODEMASK,
(unsigned long)stb.st_size,
last);
write(remout, buf, strlen(buf));
if (response() < 0)
goto next;
if ((bp = allocbuf(&buffer, fd, BUFSIZ)) == NULL) {
next: close(fd);
continue;
}
/* Keep writing after an error so that we stay sync'd up. */
for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
amt = bp->cnt;
if (i + amt > stb.st_size)
amt = stb.st_size - i;
if (!haderr) {
result = read(fd, bp->buf, amt);
if (result != amt)
haderr = result >= 0 ? EIO : errno;
}
if (haderr)
write(remout, bp->buf, amt);
else {
result = write(remout, bp->buf, amt);
if (result != amt)
haderr = result >= 0 ? EIO : errno;
}
}
if (close(fd) && !haderr)
haderr = errno;
if (!haderr)
write(remout, "", 1);
else
run_err("%s: %s", name, strerror(haderr));
response();
}
}
void
rsource(char *name, struct stat *statp)
{
DIR *dirp;
struct dirent *dp;
char *last, *vect[1], path[MAXPATHLEN];
if (!(dirp = opendir(name))) {
run_err("%s: %s", name, strerror(errno));
return;
}
last = strrchr(name, '/');
if (last == 0)
last = name;
else
last++;
if (pflag) {
snprintf(path, sizeof(path), "T%ld 0 %ld 0\n",
(long)statp->st_mtime,
(long)statp->st_atime);
write(remout, path, strlen(path));
if (response() < 0) {
closedir(dirp);
return;
}
}
snprintf(path, sizeof(path),
"D%04o %d %s\n", statp->st_mode & MODEMASK, 0, last);
write(remout, path, strlen(path));
if (response() < 0) {
closedir(dirp);
return;
}
while ((dp = readdir(dirp))) {
if (dp->d_ino == 0)
continue;
if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
continue;
if (strlen(name) + 1 + strlen(dp->d_name) >= MAXPATHLEN - 1) {
run_err("%s/%s: name too long", name, dp->d_name);
continue;
}
snprintf(path, sizeof(path), "%s/%s", name, dp->d_name);
vect[0] = path;
source(1, vect);
}
closedir(dirp);
write(remout, "E\n", 2);
response();
}
void
sink(int argc, char **argv)
{
static BUF buffer;
struct stat stb;
struct timeval tv[2];
enum { YES, NO, DISPLAYED } wrerr;
BUF *bp;
off_t i, j, size;
int amt, count, exists, first, mask, mode, ofd, omode;
int setimes, targisdir, wrerrno = 0;
char ch, *cp, *np, *targ, *why, *vect[1], buf[BUFSIZ];
#define atime tv[0]
#define mtime tv[1]
#define SCREWUP(str) { why = str; goto screwup; }
setimes = targisdir = 0;
mask = umask(0);
if (!pflag)
umask(mask);
if (argc != 1) {
run_err("ambiguous target");
exit(1);
}
targ = *argv;
if (targetshouldbedirectory)
verifydir(targ);
write(remout, "", 1);
if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
targisdir = 1;
for (first = 1;; first = 0) {
cp = buf;
if (read(remin, cp, 1) <= 0)
return;
if (*cp++ == '\n')
SCREWUP("unexpected <newline>");
do {
if (read(remin, &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)
write(STDERR_FILENO,
buf + 1, strlen(buf + 1));
if (buf[0] == '\02')
exit(1);
++errs;
continue;
}
if (buf[0] == 'E') {
write(remout, "", 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");
write(remout, "", 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((unsigned char)*cp);)
size = size * 10 + (*cp++ - '0');
if (*cp++ != ' ')
SCREWUP("size not delimited");
if (targisdir) {
static char *namebuf;
static int cursize;
size_t need;
need = strlen(targ) + strlen(cp) + 250;
if (need > cursize) {
if (!(namebuf = malloc(need)))
run_err("%s", strerror(errno));
}
snprintf(namebuf, need, "%s%s%s", targ,
*targ ? "/" : "", cp);
np = namebuf;
} else
np = targ;
exists = stat(np, &stb) == 0;
if (buf[0] == 'D') {
int mod_flag = pflag;
if (exists) {
if (!S_ISDIR(stb.st_mode)) {
errno = ENOTDIR;
goto bad;
}
if (pflag)
chmod(np, mode);
} else {
/* Handle copying from a read-only directory */
mod_flag = 1;
if (mkdir(np, mode | S_IRWXU) < 0)
goto bad;
}
vect[0] = np;
sink(1, vect);
if (setimes) {
setimes = 0;
if (utimes(np, tv) < 0)
run_err("%s: set times: %s",
np, strerror(errno));
}
if (mod_flag)
chmod(np, mode);
continue;
}
omode = mode;
mode |= S_IWRITE;
if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
bad: run_err("%s: %s", np, strerror(errno));
continue;
}
write(remout, "", 1);
if ((bp = allocbuf(&buffer, ofd, BUFSIZ)) == NULL) {
close(ofd);
continue;
}
cp = bp->buf;
wrerr = NO;
for (count = i = 0; i < size; i += BUFSIZ) {
amt = BUFSIZ;
if (i + amt > size)
amt = size - i;
count += amt;
if((j = net_read(remin, cp, amt)) != amt) {
run_err("%s", j ? strerror(errno) :
"dropped connection");
exit(1);
}
amt -= j;
cp += j;
if (count == bp->cnt) {
/* Keep reading so we stay sync'd up. */
if (wrerr == NO) {
j = write(ofd, bp->buf, count);
if (j != count) {
wrerr = YES;
wrerrno = j >= 0 ? EIO : errno;
}
}
count = 0;
cp = bp->buf;
}
}
if (count != 0 && wrerr == NO &&
(j = write(ofd, bp->buf, count)) != count) {
wrerr = YES;
wrerrno = j >= 0 ? EIO : errno;
}
if (ftruncate(ofd, size)) {
run_err("%s: truncate: %s", np, strerror(errno));
wrerr = DISPLAYED;
}
if (pflag) {
if (exists || omode != mode)
if (fchmod(ofd, omode))
run_err("%s: set mode: %s",
np, strerror(errno));
} else {
if (!exists && omode != mode)
if (fchmod(ofd, omode & ~mask))
run_err("%s: set mode: %s",
np, strerror(errno));
}
close(ofd);
response();
if (setimes && wrerr == NO) {
setimes = 0;
if (utimes(np, tv) < 0) {
run_err("%s: set times: %s",
np, strerror(errno));
wrerr = DISPLAYED;
}
}
switch(wrerr) {
case YES:
run_err("%s: %s", np, strerror(wrerrno));
break;
case NO:
write(remout, "", 1);
break;
case DISPLAYED:
break;
}
}
screwup:
run_err("protocol error: %s", why);
exit(1);
}
int
response(void)
{
char ch, *cp, resp, rbuf[BUFSIZ];
if (read(remin, &resp, sizeof(resp)) != sizeof(resp))
lostconn(0);
cp = rbuf;
switch(resp) {
case 0: /* ok */
return (0);
default:
*cp++ = resp;
/* FALLTHROUGH */
case 1: /* error, followed by error msg */
case 2: /* fatal error, "" */
do {
if (read(remin, &ch, sizeof(ch)) != sizeof(ch))
lostconn(0);
*cp++ = ch;
} while (cp < &rbuf[BUFSIZ] && ch != '\n');
if (!iamremote)
write(STDERR_FILENO, rbuf, cp - rbuf);
++errs;
if (resp == 1)
return (-1);
exit(1);
}
/* NOTREACHED */
}
#include <stdarg.h>
void
run_err(const char *fmt, ...)
{
static FILE *fp;
va_list ap;
++errs;
if (fp == NULL && !(fp = fdopen(remout, "w")))
return;
va_start(ap, fmt);
fprintf(fp, "%c", 0x01);
fprintf(fp, "rcp: ");
vfprintf(fp, fmt, ap);
fprintf(fp, "\n");
fflush(fp);
va_end(ap);
if (!iamremote) {
va_start(ap, fmt);
vwarnx(fmt, ap);
va_end(ap);
}
}
/*
* This function executes the given command as the specified user on the
* given host. This returns < 0 if execution fails, and >= 0 otherwise. This
* assigns the input and output file descriptors on success.
*
* If it cannot create necessary pipes it exits with error message.
*/
int
do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
{
int pin[2], pout[2], reserved[2];
/*
* Reserve two descriptors so that the real pipes won't get
* descriptors 0 and 1 because that will screw up dup2 below.
*/
pipe(reserved);
/* Create a socket pair for communicating with rsh. */
if (pipe(pin) < 0) {
perror("pipe");
exit(255);
}
if (pipe(pout) < 0) {
perror("pipe");
exit(255);
}
/* Free the reserved descriptors. */
close(reserved[0]);
close(reserved[1]);
/* For a child to execute the command on the remote host using rsh. */
if (fork() == 0) {
char *args[100];
unsigned int i;
/* Child. */
close(pin[1]);
close(pout[0]);
dup2(pin[0], 0);
dup2(pout[1], 1);
close(pin[0]);
close(pout[1]);
i = 0;
args[i++] = RSH_PROGRAM;
if (usekrb4)
args[i++] = "-4";
if (usekrb5)
args[i++] = "-5";
if (usebroken)
args[i++] = "-K";
if (doencrypt)
args[i++] = "-x";
if (forwardtkt)
args[i++] = "-F";
if (noencrypt)
args[i++] = "-z";
if (port != NULL) {
args[i++] = "-p";
args[i++] = port;
}
if (eflag)
args[i++] = "-e";
if (remuser != NULL) {
args[i++] = "-l";
args[i++] = remuser;
}
args[i++] = host;
args[i++] = cmd;
args[i++] = NULL;
execvp(RSH_PROGRAM, args);
perror(RSH_PROGRAM);
exit(1);
}
/* Parent. Close the other side, and return the local side. */
close(pin[0]);
*fdout = pin[1];
close(pout[1]);
*fdin = pout[0];
return 0;
}