1 /* Copyright (C) 1993, 1996, 1997, 1998, 1999 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 Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the 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 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, write to the Free 16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 17 02111-1307 USA. */ 18 19 #ifndef _UTMP_H 20 #define _UTMP_H 1 21 22 #include <features.h> 23 24 #include <sys/types.h> 25 26 27 __BEGIN_DECLS 28 29 /* Get system dependent values and data structures. */ 30 #include <bits/utmp.h> 31 32 /* Compatibility names for the strings of the canonical file names. */ 33 #define UTMP_FILE _PATH_UTMP 34 #define UTMP_FILENAME _PATH_UTMP 35 #define WTMP_FILE _PATH_WTMP 36 #define WTMP_FILENAME _PATH_WTMP 37 38 39 40 /* Make FD be the controlling terminal, stdin, stdout, and stderr; 41 then close FD. Returns 0 on success, nonzero on error. */ 42 extern int login_tty (int __fd) __THROW; 43 44 45 /* Write the given entry into utmp and wtmp. */ 46 extern void login (__const struct utmp *__entry) __THROW; 47 48 /* Write the utmp entry to say the user on UT_LINE has logged out. */ 49 extern int logout (__const char *__ut_line) __THROW; 50 51 /* Append to wtmp an entry for the current time and the given info. */ 52 extern void logwtmp (__const char *__ut_line, __const char *__ut_name, 53 __const char *__ut_host) __THROW; 54 55 /* Append entry UTMP to the wtmp-like file WTMP_FILE. */ 56 extern void updwtmp (__const char *__wtmp_file, __const struct utmp *__utmp) 57 __THROW; 58 59 /* Change name of the utmp file to be examined. */ 60 extern int utmpname (__const char *__file) __THROW; 61 62 /* Read next entry from a utmp-like file. */ 63 extern struct utmp *getutent (void) __THROW; 64 65 /* Reset the input stream to the beginning of the file. */ 66 extern void setutent (void) __THROW; 67 68 /* Close the current open file. */ 69 extern void endutent (void) __THROW; 70 71 /* Search forward from the current point in the utmp file until the 72 next entry with a ut_type matching ID->ut_type. */ 73 extern struct utmp *getutid (__const struct utmp *__id) __THROW; 74 75 /* Search forward from the current point in the utmp file until the 76 next entry with a ut_line matching LINE->ut_line. */ 77 extern struct utmp *getutline (__const struct utmp *__line) __THROW; 78 79 /* Write out entry pointed to by UTMP_PTR into the utmp file. */ 80 extern struct utmp *pututline (__const struct utmp *__utmp_ptr) __THROW; 81 82 83 #ifdef __USE_MISC 84 /* Reentrant versions of the file for handling utmp files. */ 85 extern int getutent_r (struct utmp *__buffer, struct utmp **__result) __THROW; 86 87 extern int getutid_r (__const struct utmp *__id, struct utmp *__buffer, 88 struct utmp **__result) __THROW; 89 90 extern int getutline_r (__const struct utmp *__line, 91 struct utmp *__buffer, struct utmp **__result) __THROW; 92 93 #endif /* Use misc. */ 94 95 __END_DECLS 96 97 #endif /* utmp.h */ 98