new copyright notice

[unix-history] / usr / src / libexec / ftpd / logwtmp.c

/*
* Copyright (c) 1988 The Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*
*/

#ifndef lint
static char sccsid[] = "@(#)logwtmp.c   5.6 (Berkeley) %G%";
#endif /* not lint */

#include <sys/types.h>
#include <sys/file.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <utmp.h>

static int fd = -1;

/*
* Modified version of logwtmp that holds wtmp file open
* after first call, for use with ftp (which may chroot
* after login, but before logout).
*/
logwtmp(line, name, host)
       char *line, *name, *host;
{
       struct utmp ut;
       struct stat buf;
       time_t time();
       char *strncpy();

       if (fd < 0 && (fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0)
               return;
       if (fstat(fd, &buf) == 0) {
               (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
               (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
               (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
               (void)time(&ut.ut_time);
               if (write(fd, (char *)&ut, sizeof(struct utmp)) !=
                   sizeof(struct utmp))
                       (void)ftruncate(fd, buf.st_size);
       }
}