home *** CD-ROM | disk | FTP | other *** search
- /*
- * Copyright (c) 1988 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by the University of California, Berkeley. The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
- #if defined(LIBC_SCCS) && !defined(lint)
- static char sccsid[] = "@(#)logout.c 5.2 (Berkeley) 2/17/89";
- #endif /* LIBC_SCCS and not lint */
-
- #include <sys/types.h>
- #include <sys/file.h>
- #include <sys/time.h>
- #include <utmp.h>
- #include <stdio.h>
-
- #define UTMPFILE "/etc/utmp"
-
- /* 0 on failure, 1 on success */
-
- logout(line)
- register char *line;
- {
- register FILE *fp;
- struct utmp ut;
- int rval;
- time_t time();
-
- if (!(fp = fopen(UTMPFILE, "r+")))
- return(0);
- rval = 0;
- while (fread((char *)&ut, sizeof(struct utmp), 1, fp) == 1) {
- if (!ut.ut_name[0] ||
- strncmp(ut.ut_line, line, sizeof(ut.ut_line)))
- continue;
- bzero(ut.ut_name, sizeof(ut.ut_name));
- bzero(ut.ut_host, sizeof(ut.ut_host));
- (void)time(&ut.ut_time);
- (void)fseek(fp, (long)-sizeof(struct utmp), L_INCR);
- (void)fwrite((char *)&ut, sizeof(struct utmp), 1, fp);
- (void)fseek(fp, (long)0, L_INCR);
- rval = 1;
- }
- (void)fclose(fp);
- return(rval);
- }
-