2.11BSD#431 - /usr/src/usr.lib/libutil/logout.c

   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[] = "%W% (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: 
  27: typedef struct utmp UTMP;
  28: 
  29: logout(line)
  30:     register char *line;
  31: {
  32:     register int fd;
  33:     UTMP ut;
  34:     int rval;
  35:     off_t lseek();
  36:     time_t time();
  37: 
  38:     if ((fd = open(_PATH_UTMP, O_RDWR)) < 0)
  39:         return(0);
  40:     rval = 0;
  41:     while (read(fd, (char *)&ut, sizeof(UTMP)) == sizeof(UTMP)) {
  42:         if (!ut.ut_name[0] || strncmp(ut.ut_line, line, UT_LINESIZE))
  43:             continue;
  44:         bzero(ut.ut_name, UT_NAMESIZE);
  45:         bzero(ut.ut_host, UT_HOSTSIZE);
  46:         (void)time(&ut.ut_time);
  47:         (void)lseek(fd, -(long)sizeof(UTMP), L_INCR);
  48:         (void)write(fd, (char *)&ut, sizeof(UTMP));
  49:         rval = 1;
  50:     }
  51:     (void)close(fd);
  52:     return(rval);
  53: }

Defined functions

Defined variables

Defined typedef's