| 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 MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 16 | */ |
| 17 | |
| 18 | #if defined(LIBC_SCCS) && !defined(lint) |
| 19 | static char sccsid[] = "@(#)logout.c 5.3 (Berkeley) %G%"; |
| 20 | #endif /* LIBC_SCCS and not lint */ |
| 21 | |
| 22 | #include <sys/types.h> |
| 23 | #include <sys/file.h> |
| 24 | #include <sys/time.h> |
| 25 | #include <utmp.h> |
| 26 | #include <stdio.h> |
| 27 | |
| 28 | /* 0 on failure, 1 on success */ |
| 29 | |
| 30 | logout(line) |
| 31 | register char *line; |
| 32 | { |
| 33 | register FILE *fp; |
| 34 | struct utmp ut; |
| 35 | int rval; |
| 36 | time_t time(); |
| 37 | |
| 38 | if (!(fp = fopen(_PATH_UTMP, "r+"))) |
| 39 | return(0); |
| 40 | rval = 0; |
| 41 | while (fread((char *)&ut, sizeof(struct utmp), 1, fp) == 1) { |
| 42 | if (!ut.ut_name[0] || |
| 43 | strncmp(ut.ut_line, line, sizeof(ut.ut_line))) |
| 44 | continue; |
| 45 | bzero(ut.ut_name, sizeof(ut.ut_name)); |
| 46 | bzero(ut.ut_host, sizeof(ut.ut_host)); |
| 47 | (void)time(&ut.ut_time); |
| 48 | (void)fseek(fp, (long)-sizeof(struct utmp), L_INCR); |
| 49 | (void)fwrite((char *)&ut, sizeof(struct utmp), 1, fp); |
| 50 | (void)fseek(fp, (long)0, L_INCR); |
| 51 | rval = 1; |
| 52 | } |
| 53 | (void)fclose(fp); |
| 54 | return(rval); |
| 55 | } |