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/* Copyright (C) 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <errno.h>
#include <limits.h>
#include <string.h>
#include <unistd.h>
#include <utmp.h>
void
login (const struct utmp *ut)
{
char tty[PATH_MAX + UT_LINESIZE];
int found_tty;
const char *ttyp;
struct utmp_data data;
/* Seek tty. */
found_tty = ttyname_r (STDIN_FILENO, tty, sizeof tty);
if (found_tty < 0)
found_tty = ttyname_r (STDOUT_FILENO, tty, sizeof tty);
if (found_tty < 0)
found_tty = ttyname_r (STDERR_FILENO, tty, sizeof tty);
if (found_tty >= 0)
{
/* Tell that we want to use the UTMP file. */
if (utmpname (_PATH_UTMP) != 0)
{
struct utmp tmp;
struct utmp *old;
/* Open UTMP file. */
setutent_r (&data);
/* We only want to insert the name of the tty without path. */
ttyp = basename (tty);
/* Position to record for this tty. */
#if _HAVE_UT_TYPE - 0
tmp.ut_type = USER_PROCESS;
#endif
strncpy (tmp.ut_line, ttyp, UT_LINESIZE);
/* Read the record. */
if (getutline_r (&tmp, &old, &data) >= 0 || errno == ESRCH)
{
#if _HAVE_UT_TYPE - 0
/* We have to fake the old entry because this `login'
function does not fit well into the UTMP file
handling scheme. */
old->ut_type = ut->ut_type;
#endif
pututline_r (ut, &data);
}
/* Close UTMP file. */
endutent_r (&data);
}
}
/* Update the WTMP file. Here we have to add a new entry. */
if (utmpname (_PATH_WTMP) != 0)
{
/* Open the WTMP file. */
setutent_r (&data);
/* Position at end of file. */
data.loc_utmp = lseek (data.ut_fd, 0, SEEK_END);
if (data.loc_utmp != -1)
{
#if _HAVE_UT_TYPE - 0
/* We have to fake the old entry because this `login'
function does not fit well into the UTMP file handling
scheme. */
data.ubuf.ut_type = ut->ut_type;
#endif
pututline_r (ut, &data);
}
/* Close WTMP file. */
endutent_r (&data);
}
}
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