117 lines
2.2 KiB
C
117 lines
2.2 KiB
C
#if !defined(lint) && defined(SCCSIDS)
|
|
static char sccsid[] = "@(#)rexec.c 1.1 94/10/31 SMI"; /* from UCB 4.8 83/08/18 */
|
|
#endif
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
|
|
#include <netinet/in.h>
|
|
|
|
#include <stdio.h>
|
|
#include <netdb.h>
|
|
#include <errno.h>
|
|
|
|
extern errno;
|
|
char *index();
|
|
char *getpass(), *getlogin();
|
|
#ifndef S5EMUL
|
|
char *sprintf();
|
|
#endif
|
|
|
|
rexec(ahost, rport, name, pass, cmd, fd2p)
|
|
char **ahost;
|
|
int rport;
|
|
char *name, *pass, *cmd;
|
|
int *fd2p;
|
|
{
|
|
int s, timo = 1, s3;
|
|
struct sockaddr_in sin, sin2, from;
|
|
char c;
|
|
u_short port;
|
|
struct hostent *hp;
|
|
|
|
hp = gethostbyname(*ahost);
|
|
if (hp == 0) {
|
|
fprintf(stderr, "%s: unknown host\n", *ahost);
|
|
return (-1);
|
|
}
|
|
*ahost = hp->h_name;
|
|
_ruserpass(hp->h_name, &name, &pass);
|
|
retry:
|
|
s = socket(AF_INET, SOCK_STREAM, 0);
|
|
if (s < 0) {
|
|
perror("rexec: socket");
|
|
return (-1);
|
|
}
|
|
sin.sin_family = hp->h_addrtype;
|
|
sin.sin_port = rport;
|
|
bcopy(hp->h_addr, (caddr_t)&sin.sin_addr, hp->h_length);
|
|
if (connect(s, &sin, sizeof(sin)) < 0) {
|
|
if (errno == ECONNREFUSED && timo <= 16) {
|
|
(void) close(s);
|
|
sleep(timo);
|
|
timo *= 2;
|
|
goto retry;
|
|
}
|
|
perror(hp->h_name);
|
|
(void) close(s);
|
|
return (-1);
|
|
}
|
|
if (fd2p == 0) {
|
|
(void) write(s, "", 1);
|
|
port = 0;
|
|
} else {
|
|
char num[8];
|
|
int s2, sin2len;
|
|
|
|
s2 = socket(AF_INET, SOCK_STREAM, 0);
|
|
if (s2 < 0) {
|
|
(void) close(s);
|
|
return (-1);
|
|
}
|
|
listen(s2, 1);
|
|
sin2len = sizeof (sin2);
|
|
if (getsockname(s2, (char *)&sin2, &sin2len) < 0 ||
|
|
sin2len != sizeof (sin2)) {
|
|
perror("getsockname");
|
|
(void) close(s2);
|
|
goto bad;
|
|
}
|
|
port = ntohs((u_short)sin2.sin_port);
|
|
(void) sprintf(num, "%u", port);
|
|
(void) write(s, num, strlen(num)+1);
|
|
{ int len = sizeof (from);
|
|
s3 = accept(s2, &from, &len);
|
|
close(s2);
|
|
if (s3 < 0) {
|
|
perror("accept");
|
|
port = 0;
|
|
goto bad;
|
|
}
|
|
}
|
|
*fd2p = s3;
|
|
}
|
|
(void) write(s, name, strlen(name) + 1);
|
|
/* should public key encypt the password here */
|
|
(void) write(s, pass, strlen(pass) + 1);
|
|
(void) write(s, cmd, strlen(cmd) + 1);
|
|
if (read(s, &c, 1) != 1) {
|
|
perror(*ahost);
|
|
goto bad;
|
|
}
|
|
if (c != 0) {
|
|
while (read(s, &c, 1) == 1) {
|
|
(void) write(2, &c, 1);
|
|
if (c == '\n')
|
|
break;
|
|
}
|
|
goto bad;
|
|
}
|
|
return (s);
|
|
bad:
|
|
if (port)
|
|
(void) close(*fd2p);
|
|
(void) close(s);
|
|
return (-1);
|
|
}
|