| 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 5.5 (Berkeley) %G%"; |
| 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 | static int fd = -1; |
| 30 | |
| 31 | /* |
| 32 | * Modified version of logwtmp that holds wtmp file open |
| 33 | * after first call, for use with ftp (which may chroot |
| 34 | * after login, but before logout). |
| 35 | */ |
| 36 | logwtmp(line, name, host) |
| 37 | char *line, *name, *host; |
| 38 | { |
| 39 | struct utmp ut; |
| 40 | struct stat buf; |
| 41 | time_t time(); |
| 42 | char *strncpy(); |
| 43 | |
| 44 | if (fd < 0 && (fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0) |
| 45 | return; |
| 46 | if (fstat(fd, &buf) == 0) { |
| 47 | (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line)); |
| 48 | (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name)); |
| 49 | (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host)); |
| 50 | (void)time(&ut.ut_time); |
| 51 | if (write(fd, (char *)&ut, sizeof(struct utmp)) != |
| 52 | sizeof(struct utmp)) |
| 53 | (void)ftruncate(fd, buf.st_size); |
| 54 | } |
| 55 | } |