+/*
+ * 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, &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;
+#ifdef BSD4_2
+ 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 BSD4_2
+
+#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);
+#ifdef BSD4_2
+ initgroups(pw->pw_name, pw->pw_gid);
+#endif BSD4_2
+ chdir(pw->pw_dir);
+ setuid(pw->pw_uid);
+#ifdef BSD4_2
+ execl(UUCICO, "uucico", (char *)0);
+#endif BSD4_2
+ 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>
+#ifdef BSD4_2
+#include <fcntl.h>
+#endif BSD4_2
+
+#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);
+ }
+}
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