commands/zoneinfo/logwtmp.c

   1 #ifndef lint
   2 #ifndef NOID
   3 static char     elsieid[] = "@(#)logwtmp.c      7.7";
   4 /* As received from UCB, with include reordering and OLD_TIME condition. */
   5 #endif /* !defined NOID */
   6 #endif /* !defined lint */
   7
   8 /*
   9  * Copyright (c) 1988 The Regents of the University of California.
  10  * All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms are permitted
  13  * provided that the above copyright notice and this paragraph are
  14  * duplicated in all such forms and that any documentation,
  15  * advertising materials, and other materials related to such
  16  * distribution and use acknowledge that the software was developed
  17  * by the University of California, Berkeley.  The name of the
  18  * University may not be used to endorse or promote products derived
  19  * from this software without specific prior written permission.
  20  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  21  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  22  * WARRANTIES OF MERCHANT[A]BILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  23  */
  24
  25 #ifndef lint
  26 #ifdef LIBC_SCCS
  27 static char sccsid[] = "@(#)logwtmp.c   5.2 (Berkeley) 9/20/88";
  28 #endif /* defined LIBC_SCCS */
  29 #endif /* !defined lint */
  30
  31 #include <sys/types.h>
  32 #include <time.h>
  33 #include <utmp.h>
  34 #include <fcntl.h>
  35 #include <stdlib.h>
  36 #include <unistd.h>
  37 #include <string.h>
  38
  39 #ifdef OLD_TIME
  40
  41 char dummy_to_keep_linker_happy;
  42
  43 #endif /* defined OLD_TIME */
  44
  45 #ifndef OLD_TIME
  46
  47 #include <sys/file.h>
  48 #include <sys/time.h>
  49 #include <sys/stat.h>
  50
  51 #define WTMPFILE        "/usr/adm/wtmp"
  52
  53 void logwtmp( char *line, char *name, char *host)
  54 {
  55         struct utmp ut;
  56         struct stat buf;
  57         int fd;
  58
  59         if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
  60                 return;
  61         if (!fstat(fd, &buf)) {
  62                 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
  63                 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
  64                 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
  65                 (void)time(&ut.ut_time);
  66                 if (write(fd, (char *)&ut, sizeof(struct utmp)) !=
  67                         sizeof(struct utmp))
  68                                 (void)ftruncate(fd, buf.st_size);
  69         }
  70         (void)close(fd);
  71 }
  72
  73 #endif /* !defined OLD_TIME */