1 /* 2 * Copyright (c) 1988 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 * 17 */ 18 19 #ifndef lint 20 static char sccsid[] = "@(#)logwtmp.c 5.4 (Berkeley) 02/14/89"; 21 #endif /* not lint */ 22 23 #include <sys/types.h> 24 #include <sys/file.h> 25 #include <sys/time.h> 26 #include <sys/stat.h> 27 #include <utmp.h> 28 29 #define WTMPFILE "/usr/adm/wtmp" 30 31 static int fd = -1; 32 33 /* 34 * Modified version of logwtmp that holds wtmp file open 35 * after first call, for use with ftp (which may chroot 36 * after login, but before logout). 37 */ 38 logwtmp(line, name, host) 39 char *line, *name, *host; 40 { 41 struct utmp ut; 42 struct stat buf; 43 time_t time(); 44 char *strncpy(); 45 46 if (fd < 0 && (fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0) 47 return; 48 if (fstat(fd, &buf) == 0) { 49 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line)); 50 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name)); 51 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host)); 52 (void)time(&ut.ut_time); 53 if (write(fd, (char *)&ut, sizeof(struct utmp)) != 54 sizeof(struct utmp)) 55 (void)ftruncate(fd, buf.st_size); 56 } 57 } 58