Initial revision
diff --git a/login.c b/login.c
new file mode 100644
index 0000000..0c1e61b
--- /dev/null
+++ b/login.c
@@ -0,0 +1,118 @@
+/*
+
+login.c
+
+Author: Tatu Ylonen <ylo@cs.hut.fi>
+
+Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+ All rights reserved
+
+Created: Fri Mar 24 14:51:08 1995 ylo
+
+This file performs some of the things login(1) normally does. We cannot
+easily use something like login -p -h host -f user, because there are
+several different logins around, and it is hard to determined what kind of
+login the current system has. Also, we want to be able to execute commands
+on a tty.
+
+*/
+
+#include "includes.h"
+RCSID("$Id: login.c,v 1.1 1999/10/27 03:42:44 damien Exp $");
+
+#include <utmp.h>
+#include "ssh.h"
+
+/* Returns the time when the user last logged in. Returns 0 if the
+ information is not available. This must be called before record_login.
+ The host the user logged in from will be returned in buf. */
+
+/* Returns the time when the user last logged in (or 0 if no previous login
+ is found). The name of the host used last time is returned in buf. */
+
+unsigned long get_last_login_time(uid_t uid, const char *logname,
+ char *buf, unsigned int bufsize)
+{
+ struct lastlog ll;
+ char *lastlog;
+ int fd;
+
+ lastlog = _PATH_LASTLOG;
+
+ buf[0] = '\0';
+
+ fd = open(lastlog, O_RDONLY);
+ if (fd < 0)
+ return 0;
+ lseek(fd, (off_t)((long)uid * sizeof(ll)), SEEK_SET);
+ if (read(fd, &ll, sizeof(ll)) != sizeof(ll))
+ {
+ close(fd);
+ return 0;
+ }
+ close(fd);
+ if (bufsize > sizeof(ll.ll_host) + 1)
+ bufsize = sizeof(ll.ll_host) + 1;
+ strncpy(buf, ll.ll_host, bufsize - 1);
+ buf[bufsize - 1] = 0;
+ return ll.ll_time;
+}
+
+/* Records that the user has logged in. I these parts of operating systems
+ were more standardized. */
+
+void record_login(int pid, const char *ttyname, const char *user, uid_t uid,
+ const char *host, struct sockaddr_in *addr)
+{
+ int fd;
+ struct lastlog ll;
+ char *lastlog;
+
+ struct utmp u;
+ const char *utmp, *wtmp;
+
+ /* Construct an utmp/wtmp entry. */
+ memset(&u, 0, sizeof(u));
+ strncpy(u.ut_line, ttyname + 5, sizeof(u.ut_line));
+ u.ut_time = time(NULL);
+ strncpy(u.ut_name, user, sizeof(u.ut_name));
+ strncpy(u.ut_host, host, sizeof(u.ut_host));
+
+ /* Figure out the file names. */
+ utmp = _PATH_UTMP;
+ wtmp = _PATH_WTMP;
+
+ login(&u);
+
+ lastlog = _PATH_LASTLOG;
+
+ /* Update lastlog unless actually recording a logout. */
+ if (strcmp(user, "") != 0)
+ {
+ /* It is safer to bzero the lastlog structure first because some
+ systems might have some extra fields in it (e.g. SGI) */
+ memset(&ll, 0, sizeof(ll));
+
+ /* Update lastlog. */
+ ll.ll_time = time(NULL);
+ strncpy(ll.ll_line, ttyname + 5, sizeof(ll.ll_line));
+ strncpy(ll.ll_host, host, sizeof(ll.ll_host));
+ fd = open(lastlog, O_RDWR);
+ if (fd >= 0)
+ {
+ lseek(fd, (off_t)((long)uid * sizeof(ll)), SEEK_SET);
+ if (write(fd, &ll, sizeof(ll)) != sizeof(ll))
+ log("Could not write %.100s: %.100s", lastlog, strerror(errno));
+ close(fd);
+ }
+ }
+}
+
+/* Records that the user has logged out. */
+
+void record_logout(int pid, const char *ttyname)
+{
+ const char *line = ttyname + 5; /* /dev/ttyq8 -> ttyq8 */
+ if (logout(line))
+ logwtmp(line, "", "");
+}