login/utmp.h

   1 /* Copyright (C) 1993, 1996 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19
  20 #ifndef _UTMP_H_
  21
  22 #define _UTMP_H_        1
  23 #include <features.h>
  24
  25 #include <sys/types.h>
  26
  27
  28 /* Get system dependent values and data structures.  */
  29 #include <utmpbits.h>
  30
  31 /* Compatibility names for the strings of the canonical file names.  */
  32 #define UTMP_FILE       _PATH_UTMP
  33 #define UTMP_FILENAME   _PATH_UTMP
  34 #define WTMP_FILE       _PATH_WTMP
  35 #define WTMP_FILENAME   _PATH_WTMP
  36
  37
  38
  39 /* Make FD be the controlling terminal, stdin, stdout, and stderr;
  40    then close FD.  Returns 0 on success, nonzero on error.  */
  41 extern int login_tty __P ((int __fd));
  42
  43
  44 /* Write the given entry into utmp and wtmp.  */
  45 extern void login __P ((__const struct utmp *__entry));
  46
  47 /* Write the utmp entry to say the user on UT_LINE has logged out.  */
  48 extern int logout __P ((__const char *__ut_line));
  49
  50 /* Append to wtmp an entry for the current time and the given info.  */
  51 extern void logwtmp __P ((__const char *__ut_line, __const char *__ut_name,
  52                           __const char *__ut_host));
  53
  54 /* Change name of the utmp file to be examined.  */
  55 extern int utmpname __P ((__const char *__file));
  56
  57 /* Read next entry from a utmp-like file.  */
  58 extern struct utmp *getutent __P ((void));
  59
  60 /* Rest the input stream to the beginning of the file.  */
  61 extern void __setutent __P ((void));
  62 extern void setutent __P ((void));
  63
  64 /* Close the current open file.  */
  65 extern void __endutent __P ((void));
  66 extern void endutent __P ((void));
  67
  68 /* Search forward from the current point in the utmp file until the
  69    next entry with a ut_type matching ID->ut_type.  */
  70 extern struct utmp *getutid __P ((__const struct utmp *__id));
  71
  72 /* Search forward from the current point in the utmp file until the
  73    next entry with a ut_line matching LINE->ut_line.  */
  74 extern struct utmp *getutline __P ((__const struct utmp *__line));
  75
  76 /* Write out entry pointed to by UTMP_PTR into the utmp file.  */
  77 extern struct utmp *pututline __P ((__const struct utmp *__utmp_ptr));
  78
  79
  80 #ifdef  __USE_REENTRANT
  81 /* Reentrant versions of the file for handling utmp files.  */
  82 extern int __getutent_r __P ((struct utmp *__buffer, struct utmp **__result));
  83 extern int getutent_r __P ((struct utmp *__buffer, struct utmp **__result));
  84
  85 extern int __getutid_r __P ((__const struct utmp *__id, struct utmp *__buffer,
  86                              struct utmp **__result));
  87 extern int getutid_r __P ((__const struct utmp *__id, struct utmp *__buffer,
  88                            struct utmp **__result));
  89
  90 extern int __getutline_r __P ((__const struct utmp *__line,
  91                                struct utmp *__buffer, struct utmp **__result));
  92 extern int getutline_r __P ((__const struct utmp *__line,
  93                              struct utmp *__buffer, struct utmp **__result));
  94
  95 #endif  /* Use reentrant.  */
  96
  97 __END_DECLS
  98
  99 #endif /* utmp.h  */