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Arquivotheca.SunOS-4.1.3/ucb/rcp.c
seta75D 2e8a93c394 Init
2021-10-11 18:20:23 -03:00

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/*
* Copyright (c) 1983 The 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.
*
*/
#ident "@(#)rcp.c 1.1 92/07/30 SMI from UCB 5.20 5/23/89"
/*
* rcp
*/
#include <sys/param.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <sys/dir.h>
#include <sys/signal.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <pwd.h>
#include <netdb.h>
#include <errno.h>
#include <strings.h>
#include <stdio.h>
#include <ctype.h>
/*
* It seems like Berkeley got these from pathnames.h?
*/
#define _PATH_RSH "/usr/ucb/rsh"
#define _PATH_CP "/usr/bin/cp"
#define _PATH_BSHELL "/usr/bin/sh"
#ifdef KERBEROS
#include <kerberos/krb.h>
char krb_realm[REALM_SZ];
int use_kerberos = 1, encrypt = 0;
CREDENTIALS cred;
Key_schedule schedule;
#endif
extern int errno;
extern char *sys_errlist[];
struct passwd *pwd;
int errs, pflag, port, rem, userid;
int zflag;
int iamremote, iamrecursive, targetshouldbedirectory;
#define CMDNEEDS 20
char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
int socksize = 24 * 1024; /* socket buffer size for performance */
typedef struct _buf {
int cnt;
char *buf;
} BUF;
main(argc, argv)
int argc;
char **argv;
{
extern int optind;
int ch, fflag, tflag;
char *targ, *colon();
struct passwd *getpwuid();
int lostconn();
#ifdef KERBEROS
struct servent *sp;
sp = getservbyname("kshell", "tcp");
if (sp == NULL) {
use_kerberos = 0;
old_warning("kshell service unknown");
sp = getservbyname("kshell", "tcp");
}
if (!sp) {
(void)fprintf(stderr, "rcp: shell/tcp: unknown service\n");
exit(1);
}
port = sp->s_port;
#else
port = htons(IPPORT_CMDSERVER);
#endif
if (!(pwd = getpwuid(userid = getuid()))) {
(void)fprintf(stderr, "rcp: unknown user %d.\n", userid);
exit(1);
}
fflag = tflag = 0;
while ((ch = getopt(argc, argv, "dfkprtx")) != EOF)
switch(ch) {
case 'd':
targetshouldbedirectory = 1;
break;
case 'f': /* "from" */
fflag = 1;
break;
#ifdef KERBEROS
case 'k':
strncpy(krb_realm, ++argv, REALM_SZ);
break;
#endif
case 'p': /* preserve access/mod times */
++pflag;
break;
case 'r':
++iamrecursive;
break;
case 't': /* "to" */
tflag = 1;
break;
#ifdef KERBEROS
case 'x':
encrypt = 1;
des_set_key(cred.session, schedule);
break;
#endif
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (fflag) {
iamremote = 1;
(void)response();
(void)setuid(userid);
source(argc, argv);
exit(errs);
}
if (tflag) {
iamremote = 1;
(void)setuid(userid);
sink(argc, argv);
exit(errs);
}
if (argc < 2)
usage();
if (argc > 2)
targetshouldbedirectory = 1;
rem = -1;
(void) sprintf(cmd, "rcp%s%s%s%s",
iamrecursive ? " -r" : "",
pflag ? " -p" : "",
zflag ? " -z" : "",
targetshouldbedirectory ? " -d" : "");
(void)signal(SIGPIPE, lostconn);
if (targ = colon(argv[argc - 1]))
toremote(targ, argc, argv);
else {
tolocal(argc, argv);
if (targetshouldbedirectory)
verifydir(argv[argc - 1]);
}
exit(errs);
/* NOTREACHED */
}
toremote(targ, argc, argv)
char *targ;
int argc;
char **argv;
{
int i;
char *bp, *host, *src, *suser, *thost, *tuser;
char *colon(), *malloc();
*targ++ = 0;
if (*targ == 0)
targ = ".";
if (thost = index(argv[argc - 1], '@')) {
*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 */
*src++ = 0;
if (*src == 0)
src = ".";
host = index(argv[i], '@');
if (!(bp = malloc((u_int)(strlen(_PATH_RSH) +
strlen(argv[i]) + strlen(src) +
(tuser ? strlen(tuser) : 0) +
strlen(thost) +
strlen(targ)) + CMDNEEDS + 20)))
nospace();
if (host) {
*host++ = 0;
suser = argv[i];
if (*suser == '\0')
suser = pwd->pw_name;
else if (!okname(suser))
continue;
(void)sprintf(bp,
"%s %s -l %s -n %s %s '%s%s%s:%s'",
_PATH_RSH, host, suser, cmd, src,
tuser ? tuser : "", tuser ? "@" : "",
thost, targ);
} else
(void)sprintf(bp, "%s %s -n %s %s '%s%s%s:%s'",
_PATH_RSH, argv[i], cmd, src,
tuser ? tuser : "", tuser ? "@" : "",
thost, targ);
(void)susystem(bp);
(void)free(bp);
} else { /* local to remote */
if (rem == -1) {
if (!(bp = malloc((u_int)strlen(targ) +
CMDNEEDS + 20)))
nospace();
(void)sprintf(bp, "%s -t %s", cmd, targ);
host = thost;
#ifdef KERBEROS
if (use_kerberos)
kerberos(bp,
tuser ? tuser : pwd->pw_name);
else
#endif
rem = rcmd(&host, port, pwd->pw_name,
tuser ? tuser : pwd->pw_name,
bp, 0);
if (rem < 0)
exit(1);
if (response() < 0)
exit(1);
(void)free(bp);
(void)setuid(userid);
}
source(1, argv+i);
}
}
}
tolocal(argc, argv)
int argc;
char **argv;
{
int i;
char *bp, *host, *src, *suser;
char *colon(), *malloc();
for (i = 0; i < argc - 1; i++) {
if (!(src = colon(argv[i]))) { /* local to local */
if (!(bp = malloc((u_int)(strlen(_PATH_CP) +
strlen(argv[i]) + strlen(argv[argc - 1])) + 20)))
nospace();
(void)sprintf(bp, "%s%s%s%s %s %s", _PATH_CP,
iamrecursive ? " -r" : "",
pflag ? " -p" : "",
zflag ? " -z" : "",
argv[i], argv[argc - 1]);
(void)susystem(bp);
(void)free(bp);
continue;
}
*src++ = 0;
if (*src == 0)
src = ".";
host = index(argv[i], '@');
if (host) {
*host++ = 0;
suser = argv[i];
if (*suser == '\0')
suser = pwd->pw_name;
else if (!okname(suser))
continue;
} else {
host = argv[i];
suser = pwd->pw_name;
}
if (!(bp = malloc((u_int)(strlen(src)) + CMDNEEDS + 20)))
nospace();
(void)sprintf(bp, "%s -f %s", cmd, src);
#ifdef KERBEROS
if (use_kerberos)
kerberos(bp, suser);
else
#endif
rem = rcmd(&host, port, pwd->pw_name, suser, bp, 0);
(void)free(bp);
if (rem < 0)
continue;
(void)setreuid(0, userid);
sink(1, argv + argc - 1);
(void)setreuid(userid, 0);
(void)close(rem);
rem = -1;
}
}
#ifdef KERBEROS
kerberos(bp, user)
char *bp, *user;
{
struct servent *sp;
char *host;
again: rem = KSUCCESS;
if (krb_realm[0] == '\0')
rem = krb_get_lrealm(krb_realm, 1);
if (rem == KSUCCESS) {
if (encrypt)
rem = krcmd_mutual(&host, port, user, bp, 0,
krb_realm, &cred, schedule);
else
rem = krcmd(&host, port, user, bp, 0, krb_realm);
} else {
(void)fprintf(stderr,
"rcp: error getting local realm %s\n", krb_err_txt[rem]);
exit(1);
}
if (rem < 0 && errno == ECONNREFUSED) {
use_kerberos = 0;
old_warning("remote host doesn't support Kerberos");
sp = getservbyname("shell", "tcp");
if (sp == NULL) {
(void)fprintf(stderr,
"rcp: unknown service shell/tcp\n");
exit(1);
}
port = sp->s_port;
goto again;
}
}
#endif /* KERBEROS */
verifydir(cp)
char *cp;
{
struct stat stb;
if (stat(cp, &stb) >= 0) {
if ((stb.st_mode & S_IFMT) == S_IFDIR)
return;
errno = ENOTDIR;
}
error("rcp: %s: %s.\n", cp, sys_errlist[errno]);
exit(1);
}
char *
colon(cp)
register char *cp;
{
for (; *cp; ++cp) {
if (*cp == ':')
return(cp);
if (*cp == '/')
return(0);
}
return(0);
}
okname(cp0)
char *cp0;
{
register char *cp = cp0;
register int c;
do {
c = *cp;
if (c & 0200)
goto bad;
if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-')
goto bad;
} while (*++cp);
return(1);
bad:
(void)fprintf(stderr, "rcp: invalid user name %s\n", cp0);
return(0);
}
susystem(s)
char *s;
{
int status, pid, w;
register void (*istat)(), (*qstat)();
if ((pid = vfork()) == 0) {
(void)setuid(userid);
execl(_PATH_BSHELL, "sh", "-c", s, (char *)0);
_exit(127);
}
istat = signal(SIGINT, SIG_IGN);
qstat = signal(SIGQUIT, SIG_IGN);
while ((w = wait(&status)) != pid && w != -1)
;
if (w == -1)
status = -1;
(void)signal(SIGINT, istat);
(void)signal(SIGQUIT, qstat);
return(status);
}
source(argc, argv)
int argc;
char **argv;
{
struct stat stb;
static BUF buffer;
BUF *bp;
off_t i;
int x, readerr, f, amt;
char *last, *name, buf[BUFSIZ];
BUF *allocbuf();
for (x = 0; x < argc; x++) {
name = argv[x];
if ((f = open(name, O_RDONLY, 0)) < 0) {
error("rcp: %s: %s\n", name, sys_errlist[errno]);
continue;
}
if (fstat(f, &stb) < 0)
goto notreg;
switch (stb.st_mode&S_IFMT) {
case S_IFREG:
break;
case S_IFDIR:
if (iamrecursive) {
(void)close(f);
rsource(name, &stb);
continue;
}
/* FALLTHROUGH */
default:
notreg: (void)close(f);
error("rcp: %s: not a plain file\n", name);
continue;
}
last = rindex(name, '/');
if (last == 0)
last = name;
else
last++;
if (pflag) {
/*
* Make it compatible with possible future
* versions expecting microseconds.
*/
(void)sprintf(buf, "T%ld 0 %ld 0\n", stb.st_mtime,
stb.st_atime);
(void)write(rem, buf, strlen(buf));
if (response() < 0) {
(void)close(f);
continue;
}
}
(void)sprintf(buf, "C%04o %ld %s\n", stb.st_mode&07777,
stb.st_size, last);
(void)write(rem, buf, strlen(buf));
if (response() < 0) {
(void)close(f);
continue;
}
if ((bp = allocbuf(&buffer, f, BUFSIZ)) == 0) {
(void)close(f);
continue;
}
readerr = 0;
(void) setsockopt(rem, SOL_SOCKET, SO_SNDBUF,
(char *)&socksize, sizeof (socksize));
for (i = 0; i < stb.st_size; i += bp->cnt) {
amt = bp->cnt;
if (i + amt > stb.st_size)
amt = stb.st_size - i;
if (readerr == 0 && read(f, bp->buf, amt) != amt)
readerr = errno;
(void)write(rem, bp->buf, amt);
}
(void)close(f);
if (readerr == 0)
(void)write(rem, "", 1);
else
error("rcp: %s: %s\n", name, sys_errlist[readerr]);
(void)response();
}
}
rsource(name, statp)
char *name;
struct stat *statp;
{
DIR *d;
struct direct *dp;
char *last, *vect[1], path[MAXPATHLEN];
if (!(d = opendir(name))) {
error("rcp: %s: %s\n", name, sys_errlist[errno]);
return;
}
last = rindex(name, '/');
if (last == 0)
last = name;
else
last++;
if (pflag) {
(void)sprintf(path, "T%ld 0 %ld 0\n", statp->st_mtime,
statp->st_atime);
(void)write(rem, path, strlen(path));
if (response() < 0) {
closedir(d);
return;
}
}
(void)sprintf(path, "D%04o %d %s\n", statp->st_mode&07777, 0, last);
(void)write(rem, path, strlen(path));
if (response() < 0) {
closedir(d);
return;
}
while (dp = readdir(d)) {
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) {
error("%s/%s: name too long.\n", name, dp->d_name);
continue;
}
(void)sprintf(path, "%s/%s", name, dp->d_name);
vect[0] = path;
source(1, vect);
}
closedir(d);
(void)write(rem, "E\n", 2);
(void)response();
}
response()
{
register char *cp;
char ch, resp, rbuf[BUFSIZ];
if (read(rem, &resp, sizeof(resp)) != sizeof(resp))
lostconn();
cp = rbuf;
switch(resp) {
case 0: /* ok */
return(0);
default:
*cp++ = resp;
/* FALLTHROUGH */
case 1: /* error, followed by err msg */
case 2: /* fatal error, "" */
do {
if (read(rem, &ch, sizeof(ch)) != sizeof(ch))
lostconn();
*cp++ = ch;
} while (cp < &rbuf[BUFSIZ] && ch != '\n');
if (!iamremote)
(void)write(2, rbuf, cp - rbuf);
++errs;
if (resp == 1)
return(-1);
exit(1);
}
/*NOTREACHED*/
}
lostconn()
{
if (!iamremote)
(void)fprintf(stderr, "rcp: lost connection\n");
exit(1);
}
sink(argc, argv)
int argc;
char **argv;
{
register char *cp;
static BUF buffer;
struct stat stb;
struct timeval tv[2];
BUF *bp, *allocbuf();
off_t i, j;
char ch, *targ, *why;
int amt, count, exists, first, mask, mode;
int ofd, setimes, size, targisdir, wrerr;
char *np, *vect[1], buf[BUFSIZ], *malloc();
#define atime tv[0]
#define mtime tv[1]
#define SCREWUP(str) { why = str; goto screwup; }
setimes = targisdir = 0;
mask = umask(0);
if (!pflag)
(void)umask(mask);
if (argc != 1) {
error("rcp: ambiguous target\n");
exit(1);
}
targ = *argv;
if (targetshouldbedirectory)
verifydir(targ);
(void)write(rem, "", 1);
if (stat(targ, &stb) == 0 && (stb.st_mode & S_IFMT) == S_IFDIR)
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(2, 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;
#define getnum(t) (t) = 0; while (isdigit(*cp)) (t) = (t) * 10 + (*cp++ - '0');
cp = buf;
if (*cp == 'T') {
setimes++;
cp++;
getnum(mtime.tv_sec);
if (*cp++ != ' ')
SCREWUP("mtime.sec not delimited");
getnum(mtime.tv_usec);
if (*cp++ != ' ')
SCREWUP("mtime.usec not delimited");
getnum(atime.tv_sec);
if (*cp++ != ' ')
SCREWUP("atime.sec not delimited");
getnum(atime.tv_usec);
if (*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) {
error("%s\n", 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");
size = 0;
while (isdigit(*cp))
size = size * 10 + (*cp++ - '0');
if (*cp++ != ' ')
SCREWUP("size not delimited");
if (targisdir) {
static char *namebuf;
static int cursize;
int need;
need = strlen(targ) + strlen(cp) + 250;
if (need > cursize) {
if (!(namebuf = malloc((u_int)need)))
error("out of memory\n");
}
(void)sprintf(namebuf, "%s%s%s", targ,
*targ ? "/" : "", cp);
np = namebuf;
}
else
np = targ;
exists = stat(np, &stb) == 0;
if (buf[0] == 'D') {
if (exists) {
if ((stb.st_mode&S_IFMT) != S_IFDIR) {
errno = ENOTDIR;
goto bad;
}
if (pflag)
(void)chmod(np, mode);
} else if (mkdir(np, mode) < 0)
goto bad;
vect[0] = np;
sink(1, vect);
if (setimes) {
setimes = 0;
if (utimes(np, tv) < 0)
error("rcp: can't set times on %s: %s\n",
np, sys_errlist[errno]);
}
continue;
}
if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
bad: error("rcp: %s: %s\n", np, sys_errlist[errno]);
continue;
}
/*
* If the output file exists we have to force zflag off
* to avoid erroneously seeking past old data.
*/
zopen(ofd, zflag && !exists);
if (exists && pflag)
(void)fchmod(ofd, mode);
(void) setsockopt(rem, SOL_SOCKET, SO_RCVBUF,
(char *)&socksize, sizeof (socksize));
(void)write(rem, "", 1);
if ((bp = allocbuf(&buffer, ofd, BUFSIZ)) == 0) {
(void)close(ofd);
continue;
}
cp = bp->buf;
count = 0;
wrerr = 0;
for (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) {
error("rcp: %s\n",
j ? sys_errlist[errno] :
"dropped connection");
exit(1);
}
amt -= j;
cp += j;
} while (amt > 0);
if (count == bp->cnt) {
cp = bp->buf;
if (wrerr == 0 &&
zwrite(ofd, cp, count) < 0)
wrerr++;
count = 0;
}
}
if (count != 0 && wrerr == 0 &&
zwrite(ofd, bp->buf, count) < 0)
wrerr++;
if (zclose(ofd) < 0)
wrerr++;
if (ftruncate(ofd, size) && errno != EACCES)
error("rcp: can't truncate %s: %s\n", np,
sys_errlist[errno]);
(void)close(ofd);
(void)response();
if (setimes) {
setimes = 0;
if (utimes(np, tv) < 0)
error("rcp: can't set times on %s: %s\n",
np, sys_errlist[errno]);
}
if (wrerr)
error("rcp: %s: %s\n", np, sys_errlist[errno]);
else
(void)write(rem, "", 1);
}
screwup:
error("rcp: protocol screwup: %s\n", why);
exit(1);
}
BUF *
allocbuf(bp, fd, blksize)
BUF *bp;
int fd, blksize;
{
struct stat stb;
int size;
char *malloc();
if (fstat(fd, &stb) < 0) {
error("rcp: fstat: %s\n", sys_errlist[errno]);
return(0);
}
size = roundup(stb.st_blksize, blksize);
if (size == 0)
size = blksize;
if (bp->cnt < size) {
if (bp->buf != 0)
free(bp->buf);
bp->buf = (char *)malloc((u_int)size);
if (!bp->buf) {
error("rcp: malloc: out of memory\n");
return(0);
}
}
bp->cnt = size;
return(bp);
}
/* VARARGS1 */
error(fmt, a1, a2, a3)
char *fmt;
int a1, a2, a3;
{
static FILE *fp;
++errs;
if (!fp && !(fp = fdopen(rem, "w")))
return;
(void)fprintf(fp, "%c", 0x01);
(void)fprintf(fp, fmt, a1, a2, a3);
(void)fflush(fp);
if (!iamremote)
(void)fprintf(stderr, fmt, a1, a2, a3);
}
nospace()
{
(void)fprintf(stderr, "rcp: out of memory.\n");
exit(1);
}
#ifdef KERBEROS
old_warning(str)
char *str;
{
(void)fprintf(stderr, "rcp: warning: %s, using standard rcp\n", str);
}
#endif
usage()
{
#ifdef KERBEROS
(void)fprintf(stderr, "%s\n\t%s\n",
"usage: rcp [-k realm] [-px] f1 f2",
"or: rcp [-k realm] [-rpx] f1 ... fn directory");
#else
(void)fprintf(stderr,
"usage: rcp [-p] f1 f2; or: rcp [-rp] f1 ... fn directory\n");
#endif
exit(1);
}
/*
* sparse file support
*/
static int zbsize;
static int zlastseek;
off_t lseek();
/* is it ok to try to create holes? */
zopen(fd, flag)
int fd;
{
struct stat st;
zbsize = 0;
zlastseek = 0;
if (flag &&
fstat(fd, &st) == 0 &&
(st.st_mode & S_IFMT) == S_IFREG)
zbsize = st.st_blksize;
}
/* write and/or seek */
zwrite(fd, buf, nbytes)
int fd;
register char *buf;
register int nbytes;
{
register int block = zbsize ? zbsize : nbytes;
do {
if (block > nbytes)
block = nbytes;
nbytes -= block;
if (!zbsize || notzero(buf, block)) {
register int n, count = block;
extern int errno;
do {
if ((n = write(fd, buf, count)) < 0)
return -1;
buf += n;
} while ((count -= n) > 0);
zlastseek = 0;
}
else {
if (lseek(fd, (off_t) block, L_INCR) < 0)
return -1;
buf += block;
zlastseek = 1;
}
} while (nbytes > 0);
return 0;
}
/* write last byte of file if necessary */
zclose(fd)
int fd;
{
zbsize = 0;
if (zlastseek &&
(lseek(fd, (off_t) -1, L_INCR) < 0 ||
zwrite("", 1) < 0))
return -1;
else
return 0;
}
/* return true if buffer is not all zeros */
notzero(p, n)
register char *p;
register int n;
{
register int result = 0;
while ((int) p & 3 && --n >= 0)
result |= *p++;
while ((n -= 4 * sizeof (int)) >= 0) {
result |= ((int *) p)[0];
result |= ((int *) p)[1];
result |= ((int *) p)[2];
result |= ((int *) p)[3];
if (result)
return result;
p += 4 * sizeof (int);
}
n += 4 * sizeof (int);
while (--n >= 0)
result |= *p++;
return result;
}
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