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utmp.h
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/* Copyright (C) 1993-2022 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ #ifndef _UTMP_H #define _UTMP_H 1 #include <features.h> #include <sys/types.h> __BEGIN_DECLS /* Get system dependent values and data structures. */ #include <bits/utmp.h> /* Compatibility names for the strings of the canonical file names. */ #define UTMP_FILE _PATH_UTMP #define UTMP_FILENAME _PATH_UTMP #define WTMP_FILE _PATH_WTMP #define WTMP_FILENAME _PATH_WTMP /* Make FD be the controlling terminal, stdin, stdout, and stderr; then close FD. Returns 0 on success, nonzero on error. */ extern int login_tty (int __fd) __THROW; /* Write the given entry into utmp and wtmp. */ extern void login (const struct utmp *__entry) __THROW; /* Write the utmp entry to say the user on UT_LINE has logged out. */ extern int logout (const char *__ut_line) __THROW; /* Append to wtmp an entry for the current time and the given info. */ extern void logwtmp (const char *__ut_line, const char *__ut_name, const char *__ut_host) __THROW; /* Append entry UTMP to the wtmp-like file WTMP_FILE. */ extern void updwtmp (const char *__wtmp_file, const struct utmp *__utmp) __THROW; /* Change name of the utmp file to be examined. */ extern int utmpname (const char *__file) __THROW; /* Read next entry from a utmp-like file. */ extern struct utmp *getutent (void) __THROW; /* Reset the input stream to the beginning of the file. */ extern void setutent (void) __THROW; /* Close the current open file. */ extern void endutent (void) __THROW; /* Search forward from the current point in the utmp file until the next entry with a ut_type matching ID->ut_type. */ extern struct utmp *getutid (const struct utmp *__id) __THROW; /* Search forward from the current point in the utmp file until the next entry with a ut_line matching LINE->ut_line. */ extern struct utmp *getutline (const struct utmp *__line) __THROW; /* Write out entry pointed to by UTMP_PTR into the utmp file. */ extern struct utmp *pututline (const struct utmp *__utmp_ptr) __THROW; #ifdef __USE_MISC /* Reentrant versions of the file for handling utmp files. */ extern int getutent_r (struct utmp *__buffer, struct utmp **__result) __THROW; extern int getutid_r (const struct utmp *__id, struct utmp *__buffer, struct utmp **__result) __THROW; extern int getutline_r (const struct utmp *__line, struct utmp *__buffer, struct utmp **__result) __THROW; #endif /* Use misc. */ __END_DECLS #endif /* utmp.h */