-/* Copyright (C) 1996 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
-Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>
+ and Paul Janzen <pcj@primenet.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 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.
+ 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. */
+ 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 <assert.h>
+#include <bits/libc-lock.h>
+#include <stdio.h>
+#include <string.h>
#include <unistd.h>
#include <utmp.h>
+#include "utmp-private.h"
-int
-__getutent_r (struct utmp **utmp, struct utmp_data *utmp_data)
+
+/* The various backends we have. */
+static int setutent_unknown (int reset);
+static int getutent_r_unknown (struct utmp *buffer, struct utmp **result);
+static struct utmp *pututline_unknown (const struct utmp *data);
+static void endutent_unknown (void);
+
+/* Initial Jump table. */
+struct utfuncs __libc_utmp_unknown_functions =
+{
+ setutent_unknown,
+ getutent_r_unknown,
+ NULL,
+ NULL,
+ pututline_unknown,
+ endutent_unknown,
+ NULL
+};
+
+/* Currently selected backend. */
+struct utfuncs *__libc_utmp_jump_table = &__libc_utmp_unknown_functions;
+
+/* We need to protect the opening of the file. */
+__libc_lock_define_initialized (, __libc_utmp_lock)
+
+
+void
+__setutent (void)
+{
+ __libc_lock_lock (__libc_utmp_lock);
+
+ (void) (*__libc_utmp_jump_table->setutent) (1);
+
+ __libc_lock_unlock (__libc_utmp_lock);
+}
+weak_alias (__setutent, setutent)
+
+
+static int
+setutent_unknown (int reset)
{
- /* Open utmp file if not already done. */
- if (utmp_data->ut_fd == -1)
+ /* We have to test whether it is still not decided which backend to use. */
+ assert (__libc_utmp_jump_table == &__libc_utmp_unknown_functions);
+
+ /* See whether utmpd is running. */
+ if ((*__libc_utmp_daemon_functions.setutent) (reset))
+ __libc_utmp_jump_table = &__libc_utmp_daemon_functions;
+ else
{
- setutent_r (utmp_data);
- if (utmp_data->ut_fd == -1)
- return -1;
+ /* Use the normal file, but if the current file is _PATH_UTMP or
+ _PATH_WTMP and the corresponding extended file (with an extra
+ 'x' added to the pathname) exists, we use the extended file,
+ because the original file is in a different format. */
+ if (strcmp (__libc_utmp_file_name, _PATH_UTMP) == 0
+ && __access (_PATH_UTMP "x", F_OK) == 0)
+ __utmpname (_PATH_UTMP "x");
+ else if (strcmp (__libc_utmp_file_name, _PATH_WTMP) == 0
+ && __access (_PATH_WTMP "x", F_OK) == 0)
+ __utmpname (_PATH_WTMP "x");
+
+ (*__libc_utmp_file_functions.setutent) (reset);
+ __libc_utmp_jump_table = &__libc_utmp_file_functions;
}
- /* Position file correctly. */
- if (lseek (utmp_data->ut_fd, utmp_data->loc_utmp, SEEK_SET) == -1)
- return -1;
+ return 0;
+}
- /* Read the next entry. */
- if (read (utmp_data->ut_fd, &utmp_data->ubuf, sizeof (struct utmp))
- != sizeof (struct utmp))
- return -1;
- /* Update position pointer. */
- utmp_data->loc_utmp += sizeof (struct utmp);
+void
+__endutent (void)
+{
+ __libc_lock_lock (__libc_utmp_lock);
- *utmp = &utmp_data->ubuf;
+ (*__libc_utmp_jump_table->endutent) ();
- return 0;
+ __libc_lock_unlock (__libc_utmp_lock);
+}
+weak_alias (__endutent, endutent)
+
+
+static void
+endutent_unknown (void)
+{
+ /* Huh, how do we came here? Nothing to do. */
+}
+
+
+int
+__getutent_r (struct utmp *buffer, struct utmp **result)
+{
+ int retval;
+
+ __libc_lock_lock (__libc_utmp_lock);
+
+ retval = (*__libc_utmp_jump_table->getutent_r) (buffer, result);
+
+ __libc_lock_unlock (__libc_utmp_lock);
+
+ return retval;
}
weak_alias (__getutent_r, getutent_r)
+
+
+static int
+getutent_r_unknown (struct utmp *buffer, struct utmp **result)
+{
+ /* It is not yet initialized. */
+ setutent_unknown (0);
+
+ return (*__libc_utmp_jump_table->getutent_r) (buffer, result);
+}
+
+
+struct utmp *
+__pututline (const struct utmp *data)
+{
+ struct utmp *buffer;
+
+ __libc_lock_lock (__libc_utmp_lock);
+
+ buffer = (*__libc_utmp_jump_table->pututline) (data);
+
+ __libc_lock_unlock (__libc_utmp_lock);
+
+ return buffer;
+}
+weak_alias (__pututline, pututline)
+
+
+static struct utmp *
+pututline_unknown (const struct utmp *data)
+{
+ /* It is not yet initialized. */
+ setutent_unknown (0);
+
+ return (*__libc_utmp_jump_table->pututline) (data);
+}
projects / kopensolaris-gnu / glibc.git / blobdiff