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