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