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Annotation of 43BSDReno/lib/libutil/logout.c, revision 1.1.1.1

1.1       root        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: (1) source distributions retain this entire copyright
                      7:  * notice and comment, and (2) distributions including binaries display
                      8:  * the following acknowledgement:  ``This product includes software
                      9:  * developed by the University of California, Berkeley and its contributors''
                     10:  * in the documentation or other materials provided with the distribution
                     11:  * and in all advertising materials mentioning features or use of this
                     12:  * software. Neither the name of the University nor the names of its
                     13:  * contributors may be used to endorse or promote products derived
                     14:  * from this software without specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  */
                     19: 
                     20: #if defined(LIBC_SCCS) && !defined(lint)
                     21: static char sccsid[] = "@(#)logout.c   5.5 (Berkeley) 6/1/90";
                     22: #endif /* LIBC_SCCS and not lint */
                     23: 
                     24: #include <sys/types.h>
                     25: #include <sys/file.h>
                     26: #include <sys/time.h>
                     27: #include <utmp.h>
                     28: 
                     29: typedef struct utmp UTMP;
                     30: 
                     31: logout(line)
                     32:        register char *line;
                     33: {
                     34:        register int fd;
                     35:        UTMP ut;
                     36:        int rval;
                     37:        off_t lseek();
                     38:        time_t time();
                     39: 
                     40:        if ((fd = open(_PATH_UTMP, O_RDWR)) < 0)
                     41:                return(0);
                     42:        rval = 0;
                     43:        while (read(fd, (char *)&ut, sizeof(UTMP)) == sizeof(UTMP)) {
                     44:                if (!ut.ut_name[0] || strncmp(ut.ut_line, line, UT_LINESIZE))
                     45:                        continue;
                     46:                bzero(ut.ut_name, UT_NAMESIZE);
                     47:                bzero(ut.ut_host, UT_HOSTSIZE);
                     48:                (void)time(&ut.ut_time);
                     49:                (void)lseek(fd, -(long)sizeof(UTMP), L_INCR);
                     50:                (void)write(fd, (char *)&ut, sizeof(UTMP));
                     51:                rval = 1;
                     52:        }
                     53:        (void)close(fd);
                     54:        return(rval);
                     55: }

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