292 lines
7.1 KiB
C
292 lines
7.1 KiB
C
/*
|
|
* Copyright (c) 1985 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Rick Adams.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef lint
|
|
char copyright[] =
|
|
"@(#) Copyright (c) 1985 The Regents of the University of California.\n\
|
|
All rights reserved.\n";
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)uucpd.c 5.10 (Berkeley) 2/26/91";
|
|
#endif /* not lint */
|
|
|
|
/*
|
|
* 4.2BSD TCP/IP server for uucico
|
|
* uucico's TCP channel causes this server to be run at the remote end.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
#include <netdb.h>
|
|
#include <signal.h>
|
|
#include <fcntl.h>
|
|
#include <time.h>
|
|
#include <pwd.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include "pathnames.h"
|
|
|
|
struct sockaddr_in hisctladdr;
|
|
int hisaddrlen = sizeof hisctladdr;
|
|
struct sockaddr_in myctladdr;
|
|
int mypid;
|
|
|
|
char Username[64];
|
|
char *nenv[] = {
|
|
Username,
|
|
NULL,
|
|
};
|
|
extern char **environ;
|
|
|
|
main(argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
#ifndef BSDINETD
|
|
register int s, tcp_socket;
|
|
struct servent *sp;
|
|
#endif /* !BSDINETD */
|
|
extern int errno;
|
|
int dologout();
|
|
|
|
environ = nenv;
|
|
#ifdef BSDINETD
|
|
close(1); close(2);
|
|
dup(0); dup(0);
|
|
hisaddrlen = sizeof (hisctladdr);
|
|
if (getpeername(0, (struct sockaddr *)&hisctladdr, &hisaddrlen) < 0) {
|
|
fprintf(stderr, "%s: ", argv[0]);
|
|
perror("getpeername");
|
|
_exit(1);
|
|
}
|
|
if (fork() == 0)
|
|
doit(&hisctladdr);
|
|
dologout();
|
|
exit(1);
|
|
#else /* !BSDINETD */
|
|
sp = getservbyname("uucp", "tcp");
|
|
if (sp == NULL){
|
|
perror("uucpd: getservbyname");
|
|
exit(1);
|
|
}
|
|
if (fork())
|
|
exit(0);
|
|
if ((s=open(_PATH_TTY, 2)) >= 0){
|
|
ioctl(s, TIOCNOTTY, (char *)0);
|
|
close(s);
|
|
}
|
|
|
|
bzero((char *)&myctladdr, sizeof (myctladdr));
|
|
myctladdr.sin_family = AF_INET;
|
|
myctladdr.sin_port = sp->s_port;
|
|
tcp_socket = socket(AF_INET, SOCK_STREAM, 0);
|
|
if (tcp_socket < 0) {
|
|
perror("uucpd: socket");
|
|
exit(1);
|
|
}
|
|
if (bind(tcp_socket, (char *)&myctladdr, sizeof (myctladdr)) < 0) {
|
|
perror("uucpd: bind");
|
|
exit(1);
|
|
}
|
|
listen(tcp_socket, 3); /* at most 3 simultaneuos uucp connections */
|
|
signal(SIGCHLD, dologout);
|
|
|
|
for(;;) {
|
|
s = accept(tcp_socket, &hisctladdr, &hisaddrlen);
|
|
if (s < 0){
|
|
if (errno == EINTR)
|
|
continue;
|
|
perror("uucpd: accept");
|
|
exit(1);
|
|
}
|
|
if (fork() == 0) {
|
|
close(0); close(1); close(2);
|
|
dup(s); dup(s); dup(s);
|
|
close(tcp_socket); close(s);
|
|
doit(&hisctladdr);
|
|
exit(1);
|
|
}
|
|
close(s);
|
|
}
|
|
#endif /* !BSDINETD */
|
|
}
|
|
|
|
doit(sinp)
|
|
struct sockaddr_in *sinp;
|
|
{
|
|
char user[64], passwd[64];
|
|
char *xpasswd, *crypt();
|
|
struct passwd *pw, *getpwnam();
|
|
|
|
alarm(60);
|
|
printf("login: "); fflush(stdout);
|
|
if (readline(user, sizeof user) < 0) {
|
|
fprintf(stderr, "user read\n");
|
|
return;
|
|
}
|
|
/* truncate username to 8 characters */
|
|
user[8] = '\0';
|
|
pw = getpwnam(user);
|
|
if (pw == NULL) {
|
|
fprintf(stderr, "user unknown\n");
|
|
return;
|
|
}
|
|
if (strcmp(pw->pw_shell, _PATH_UUCICO)) {
|
|
fprintf(stderr, "Login incorrect.");
|
|
return;
|
|
}
|
|
if (pw->pw_passwd && *pw->pw_passwd != '\0') {
|
|
printf("Password: "); fflush(stdout);
|
|
if (readline(passwd, sizeof passwd) < 0) {
|
|
fprintf(stderr, "passwd read\n");
|
|
return;
|
|
}
|
|
xpasswd = crypt(passwd, pw->pw_passwd);
|
|
if (strcmp(xpasswd, pw->pw_passwd)) {
|
|
fprintf(stderr, "Login incorrect.");
|
|
return;
|
|
}
|
|
}
|
|
alarm(0);
|
|
sprintf(Username, "USER=%s", user);
|
|
dologin(pw, sinp);
|
|
setgid(pw->pw_gid);
|
|
initgroups(pw->pw_name, pw->pw_gid);
|
|
chdir(pw->pw_dir);
|
|
setuid(pw->pw_uid);
|
|
execl(_PATH_UUCICO, "uucico", (char *)0);
|
|
perror("uucico server: execl");
|
|
}
|
|
|
|
readline(p, n)
|
|
register char *p;
|
|
register int n;
|
|
{
|
|
char c;
|
|
|
|
while (n-- > 0) {
|
|
if (read(0, &c, 1) <= 0)
|
|
return(-1);
|
|
c &= 0177;
|
|
if (c == '\n' || c == '\r') {
|
|
*p = '\0';
|
|
return(0);
|
|
}
|
|
*p++ = c;
|
|
}
|
|
return(-1);
|
|
}
|
|
|
|
#include <utmp.h>
|
|
#include <fcntl.h>
|
|
|
|
#define SCPYN(a, b) strncpy(a, b, sizeof (a))
|
|
|
|
struct utmp utmp;
|
|
|
|
dologout()
|
|
{
|
|
union wait status;
|
|
int pid, wtmp;
|
|
|
|
#ifdef BSDINETD
|
|
while ((pid=wait((int *)&status)) > 0) {
|
|
#else /* !BSDINETD */
|
|
while ((pid=wait3((int *)&status,WNOHANG,0)) > 0) {
|
|
#endif /* !BSDINETD */
|
|
wtmp = open(_PATH_WTMP, O_WRONLY|O_APPEND);
|
|
if (wtmp >= 0) {
|
|
sprintf(utmp.ut_line, "uucp%.4d", pid);
|
|
SCPYN(utmp.ut_name, "");
|
|
SCPYN(utmp.ut_host, "");
|
|
(void) time(&utmp.ut_time);
|
|
(void) write(wtmp, (char *)&utmp, sizeof (utmp));
|
|
(void) close(wtmp);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Record login in wtmp file.
|
|
*/
|
|
dologin(pw, sin)
|
|
struct passwd *pw;
|
|
struct sockaddr_in *sin;
|
|
{
|
|
char line[32];
|
|
char remotehost[32];
|
|
int wtmp, f;
|
|
struct hostent *hp = gethostbyaddr((char *)&sin->sin_addr,
|
|
sizeof (struct in_addr), AF_INET);
|
|
|
|
if (hp) {
|
|
strncpy(remotehost, hp->h_name, sizeof (remotehost));
|
|
endhostent();
|
|
} else
|
|
strncpy(remotehost, inet_ntoa(sin->sin_addr),
|
|
sizeof (remotehost));
|
|
wtmp = open(_PATH_WTMP, O_WRONLY|O_APPEND);
|
|
if (wtmp >= 0) {
|
|
/* hack, but must be unique and no tty line */
|
|
sprintf(line, "uucp%.4d", getpid());
|
|
SCPYN(utmp.ut_line, line);
|
|
SCPYN(utmp.ut_name, pw->pw_name);
|
|
SCPYN(utmp.ut_host, remotehost);
|
|
time(&utmp.ut_time);
|
|
(void) write(wtmp, (char *)&utmp, sizeof (utmp));
|
|
(void) close(wtmp);
|
|
}
|
|
if ((f = open(_PATH_LASTLOG, O_RDWR)) >= 0) {
|
|
struct lastlog ll;
|
|
|
|
time(&ll.ll_time);
|
|
lseek(f, (long)pw->pw_uid * sizeof(struct lastlog), 0);
|
|
strcpy(line, remotehost);
|
|
SCPYN(ll.ll_line, line);
|
|
SCPYN(ll.ll_host, remotehost);
|
|
(void) write(f, (char *) &ll, sizeof ll);
|
|
(void) close(f);
|
|
}
|
|
}
|