1 /* 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 */ 8 9 #ifndef lint 10 static char sccsid[] = "@(#)logwtmp.c 8.1 (Berkeley) 06/04/93"; 11 #endif /* not lint */ 12 13 #include <sys/types.h> 14 #include <sys/time.h> 15 #include <sys/stat.h> 16 17 #include <fcntl.h> 18 #include <utmp.h> 19 #include <unistd.h> 20 #include <stdio.h> 21 #include <string.h> 22 #include "extern.h" 23 24 static int fd = -1; 25 26 /* 27 * Modified version of logwtmp that holds wtmp file open 28 * after first call, for use with ftp (which may chroot 29 * after login, but before logout). 30 */ 31 void 32 logwtmp(line, name, host) 33 char *line, *name, *host; 34 { 35 struct utmp ut; 36 struct stat buf; 37 38 if (fd < 0 && (fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0) 39 return; 40 if (fstat(fd, &buf) == 0) { 41 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line)); 42 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name)); 43 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host)); 44 (void)time(&ut.ut_time); 45 if (write(fd, (char *)&ut, sizeof(struct utmp)) != 46 sizeof(struct utmp)) 47 (void)ftruncate(fd, buf.st_size); 48 } 49 } 50