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* $Xorg: sessreg.c,v 1.5 2000/08/17 19:54:15 cpqbld Exp $
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* Copyright 1990, 1998 The Open Group
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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* Except as contained in this notice, the name of The Open Group shall
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* not be used in advertising or otherwise to promote the sale, use or
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* other dealings in this Software without prior written authorization
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* from The Open Group.
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/* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, and/or sell copies of the Software, and to permit persons
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* to whom the Software is furnished to do so, provided that the above
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* copyright notice(s) and this permission notice appear in all copies of
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* the Software and that both the above copyright notice(s) and this
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* permission notice appear in supporting documentation.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
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* OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
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* INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
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* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
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* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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* Except as contained in this notice, the name of a copyright holder
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* shall not be used in advertising or otherwise to promote the sale, use
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* or other dealings in this Software without prior written authorization
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* of the copyright holder.
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* Author: Keith Packard, MIT X Consortium
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* Lastlog support and dynamic utmp entry allocation
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* by Andreas Stolcke <stolcke@icsi.berkeley.edu>
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/* $XFree86: xc/programs/xdm/sessreg.c,v 3.18 2001/12/14 20:01:24 dawes Exp $ */
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* simple wtmp/utmp frobber
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* usage: sessreg [ -w <wtmp-file> ] [ -u <utmp-file> ]
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* [ -h <host-name> ] / BSD only
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* [ -s <slot-number> ] [ -x Xservers-file ] / BSD only
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* [ -t <ttys-file> ] / BSD only
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* [ -a ] [ -d ] user-name
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* one of -a or -d must be specified
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# include <X11/Xfuncs.h>
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#ifndef HAVE_CONFIG_H /* Imake fallback - hardcode platforms with utmpx */
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# if (defined(sun) && defined (__SVR4))
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# define HAVE_UTMPX_UT_SYSLEN 1
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# if HAVE_UTMPX_UT_SYSLEN
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# ifndef HAVE_LASTLOG_H
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# if defined(SYSV) || (defined(SVR4) && !defined(sun)) || defined(Lynx) || defined(__QNX__) || defined(__DARWIN__) || defined(_SEQUENT_)
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#if defined(CSRG_BASED) || defined(HAVE_SYS_PARAM_H)
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#include <sys/param.h>
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# include <lastlog.h>
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# include <lastlog.h>
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#if defined(__SVR4) || defined(SVR4) || defined(linux) || defined(__GLIBC__)
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#if !defined(__FreeBSD__) && !defined(__OpenBSD__)
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/* *BSD doesn't like a ':0' type entry in utmp */
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# define WTMP_FILE _PATH_WTMP
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# define WTMP_FILE "/usr/adm/wtmp"
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# define UTMP_FILE _PATH_UTMP
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# define UTMP_FILE "/etc/utmp"
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# ifdef _PATH_LASTLOG
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# define LLOG_FILE _PATH_LASTLOG
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# define LLOG_FILE "/usr/adm/lastlog"
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# define TTYS_FILE "/etc/ttys"
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#define Time_t time_t
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extern long lseek ();
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extern char *ttyname ();
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static void set_utmp (struct utmp *u, char *line, char *user, char *host, Time_t date, int addp);
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static void set_utmpx (struct utmpx *u, const char *line, const char *user,
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const char *host, Time_t date, int addp);
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int wflag, uflag, lflag;
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char *wtmp_file, *utmp_file, *line;
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static char *wtmpx_file = NULL, *utmpx_file = NULL;
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int utmp_none, wtmp_none;
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* BSD specific variables. To make life much easier for Xstartup/Xreset
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* maintainers, these arguments are accepted but ignored for sysV
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int hflag, sflag, xflag, tflag;
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char *host_name = NULL;
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char *xservers_file, *ttys_file;
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int llog_none, Lflag;
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static int findslot (char *line_name, char *host_name, int addp, int slot);
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static int Xslot (char *ttys_file, char *servers_file, char *tty_line,
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char *host_name, int addp);
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fprintf (stderr, "%s: usage %s {-a -d} [-w wtmp-file] [-u utmp-file]", program_name, program_name);
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fprintf (stderr, " [-L lastlog-file]");
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fprintf (stderr, "\n");
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fprintf (stderr, " [-t ttys-file] [-l line-name] [-h host-name]\n");
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fprintf (stderr, " [-s slot-number] [-x servers-file] user-name\n");
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getstring (char ***avp, int *flagp)
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syserr (int x, const char *s)
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sysnerr (int x, const char *s)
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main (int argc, char **argv)
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struct utmp utmp_entry;
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struct utmpx utmpx_entry;
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program_name = argv[0];
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while (*++argv && **argv == '-') {
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wtmp_file = getstring (&argv, &wflag);
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if (!strcmp (wtmp_file, "none"))
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utmp_file = getstring (&argv, &uflag);
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if (!strcmp (utmp_file, "none"))
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llog_file = getstring (&argv, &Lflag);
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if (!strcmp (llog_file, "none"))
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ttys_file = getstring (&argv, &tflag);
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line = getstring (&argv, &lflag);
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host_name = getstring (&argv, &hflag);
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slot_number = atoi (getstring (&argv, &sflag));
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xservers_file = getstring (&argv, &xflag);
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usage (!(user_name = *argv++));
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* complain if neither aflag nor dflag are set,
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* or if both are set.
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usage (!(aflag ^ dflag));
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usage (xflag && !lflag);
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/* set up default file names */
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wtmp_file = WTMP_FILE;
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wtmpx_file = WTMPX_FILE;
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utmp_file = UTMP_FILE;
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utmpx_file = UTMPX_FILE;
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llog_file = LLOG_FILE;
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#if !defined(SYSV) && !defined(linux) && !defined(__QNX__)
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ttys_file = TTYS_FILE;
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if (!sflag && !utmp_none) {
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sysnerr (slot_number = Xslot (ttys_file, xservers_file, line, host_name, aflag), "Xslot");
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sysnerr (slot_number = ttyslot (), "ttyslot");
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sysnerr ((line_tmp = ttyname (0)) != NULL, "ttyname");
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line = strrchr(line_tmp, '/');
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time (¤t_time);
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set_utmp (&utmp_entry, line, user_name, host_name, current_time, aflag);
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/* need to set utmpxname() before calling set_utmpx() for
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UtmpxIdOpen to work */
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if (utmpx_file != NULL) {
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utmpxname (utmpx_file);
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set_utmpx (&utmpx_entry, line, user_name,
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host_name, current_time, aflag);
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if (utmpx_file != NULL) {
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(void) getutxid (&utmpx_entry);
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pututxline (&utmpx_entry);
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utmpname (utmp_file);
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(void) getutid (&utmp_entry);
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pututline (&utmp_entry);
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utmp = open (utmp_file, O_RDWR);
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syserr ((int) lseek (utmp, (long) slot_number * sizeof (struct utmp), 0), "lseek");
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sysnerr (write (utmp, (char *) &utmp_entry, sizeof (utmp_entry))
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== sizeof (utmp_entry), "write utmp entry");
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if (wtmpx_file != NULL) {
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updwtmpx(wtmpx_file, &utmpx_entry);
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wtmp = open (wtmp_file, O_WRONLY|O_APPEND);
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sysnerr (write (wtmp, (char *) &utmp_entry, sizeof (utmp_entry))
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== sizeof (utmp_entry), "write wtmp entry");
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if (aflag && !llog_none) {
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struct passwd *pwd = getpwnam(user_name);
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sysnerr( pwd != NULL, "get user id");
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llog = open (llog_file, O_RDWR);
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sysnerr (lseek(llog, (long) pwd->pw_uid*sizeof(ll), 0)
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!= -1, "seeking lastlog entry");
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bzero((char *)&ll, sizeof(ll));
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ll.ll_time = current_time;
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(void) strncpy (ll.ll_line, line, sizeof (ll.ll_line));
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(void) strncpy (ll.ll_host, host_name, sizeof (ll.ll_host));
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sysnerr (write (llog, (char *) &ll, sizeof (ll))
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== sizeof (ll), "write lastlog entry");
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* fill in the appropriate records of the utmp entry
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set_utmp (struct utmp *u, char *line, char *user, char *host, Time_t date, int addp)
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bzero (u, sizeof (*u));
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(void) strncpy (u->ut_line, line, sizeof (u->ut_line));
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bzero (u->ut_line, sizeof (u->ut_line));
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(void) strncpy (u->ut_name, user, sizeof (u->ut_name));
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bzero (u->ut_name, sizeof (u->ut_name));
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* this is a bit crufty, but
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* follows the apparent conventions in
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* the ttys file. ut_id is only 4 bytes
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* long, and the last 4 bytes of the line
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* name are written into it, left justified.
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if (i >= sizeof (u->ut_id))
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i -= sizeof (u->ut_id);
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(void) strncpy (u->ut_id, line + i, sizeof (u->ut_id));
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bzero (u->ut_id, sizeof (u->ut_id));
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u->ut_pid = getppid ();
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u->ut_type = USER_PROCESS;
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u->ut_type = DEAD_PROCESS;
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#if (!defined(SYSV) && !defined(__QNX__)) || defined(linux)
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(void) strncpy (u->ut_host, host, sizeof (u->ut_host));
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bzero (u->ut_host, sizeof (u->ut_host));
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UtmpxIdOpen( char *utmpId )
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struct utmpx *u; /* pointer to entry in utmp file */
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int status = 1; /* return code */
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while ( (u = getutxent()) != NULL ) {
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if ( (strncmp(u->ut_id, utmpId, 4) == 0 ) &&
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u->ut_type != DEAD_PROCESS ) {
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set_utmpx (struct utmpx *u, const char *line, const char *user,
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const char *host, Time_t date, int addp)
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static const char letters[] =
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"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
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if(strcmp(line, ":0") == 0)
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(void) strcpy(u->ut_line, "console");
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(void) strncpy (u->ut_line, line, sizeof (u->ut_line));
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strncpy(u->ut_host, line, sizeof(u->ut_host));
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u->ut_syslen = strlen(line);
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bzero (u->ut_line, sizeof (u->ut_line));
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(void) strncpy (u->ut_name, user, sizeof (u->ut_name));
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bzero (u->ut_name, sizeof (u->ut_name));
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* this is a bit crufty, but
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* follows the apparent conventions in
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* the ttys file. ut_id is only 4 bytes
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* long, and the last 4 bytes of the line
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* name are written into it, left justified.
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if (i >= sizeof (u->ut_id))
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i -= sizeof (u->ut_id);
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(void) strncpy (u->ut_id, line + i, sizeof (u->ut_id));
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/* make sure there is no entry using identical ut_id */
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if (!UtmpxIdOpen(u->ut_id) && addp) {
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int limit = sizeof(letters) - 1;
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u->ut_id[1] = line[i];
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u->ut_id[2] = line[i+1];
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u->ut_id[3] = line[i+2];
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u->ut_id[0] = letters[t];
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} while (!UtmpxIdOpen(u->ut_id) && (t < limit));
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if (!addp && strstr(line, ":") != NULL) {
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while ( (tmpu = getutxent()) != NULL ) {
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if ( (strcmp(tmpu->ut_host, line) == 0 ) &&
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tmpu->ut_type != DEAD_PROCESS ) {
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strncpy(u->ut_id, tmpu->ut_id,
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bzero (u->ut_id, sizeof (u->ut_id));
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u->ut_pid = getppid ();
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u->ut_type = USER_PROCESS;
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u->ut_type = DEAD_PROCESS;
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u->ut_tv.tv_sec = date;
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u->ut_tv.tv_usec = 0;
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#endif /* USE_UTMPX */
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* compute the slot-number for an X display. This is computed
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* by counting the lines in /etc/ttys and adding the line-number
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* that the display appears on in Xservers. This is a poor
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* design, but is limited by the non-existant interface to utmp.
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* If host_name is non-NULL, assume it contains the display name,
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* otherwise use the tty_line argument (i.e., the tty name).
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Xslot (char *ttys_file, char *servers_file, char *tty_line, char *host_name,
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FILE *ttys, *servers;
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char servers_line[1024];
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/* remove screen number from the display name */
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memset(disp_name, 0, sizeof(disp_name));
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strncpy(disp_name, host_name ? host_name : tty_line, sizeof(disp_name)-1);
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pos = strrchr(disp_name, ':');
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pos = strchr(pos, '.');
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sysnerr ((int)(long)(ttys = fopen (ttys_file, "r")), ttys_file);
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while ((c = getc (ttys)) != EOF)
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(void) fclose (ttys);
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sysnerr ((int)(long)(servers = fopen (servers_file, "r")), servers_file);
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len = strlen (disp_name);
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while (fgets (servers_line, sizeof (servers_line), servers)) {
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if (column0 && *servers_line != '#') {
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if (!strncmp (disp_name, servers_line, len) &&
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(servers_line[len] == ' ' ||
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servers_line[len] == '\t'))
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if (servers_line[strlen(servers_line)-1] != '\n')
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* display not found in Xservers file - allocate utmp entry dinamically
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return findslot (tty_line, host_name, addp, slot);
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* find a free utmp slot for the X display. This allocates a new entry
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* past the regular tty entries if necessary, reusing existing entries
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* (identified by (line,hostname)) if possible.
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findslot (char *line_name, char *host_name, int addp, int slot)
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syserr(utmp = open (utmp_file, O_RDONLY), "open utmp");
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* first, try to locate a previous entry for this display
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* also record location of a free slots in case we need a new one
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syserr ((int) lseek (utmp, (long) slot * sizeof (struct utmp), 0), "lseek");
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while (read (utmp, (char *) &entry, sizeof (entry)) == sizeof (entry)) {
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if (strncmp(entry.ut_line, line_name,
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sizeof(entry.ut_line)) == 0
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strncmp(entry.ut_host, host_name,
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sizeof(entry.ut_host)) == 0
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if (freeslot < 0 && *entry.ut_name == '\0')
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return 0; /* trying to delete a non-existing entry */
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else if (freeslot < 0)
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return slot; /* first slot past current entries */
added
removed
sessreg/sessreg.c
