summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorAndrew Tridgell <tridge@samba.org>2001-04-18 16:42:07 +0000
committerAndrew Tridgell <tridge@samba.org>2001-04-18 16:42:07 +0000
commit3b4d7082cb9723214fe2410dd7a1e2d11d0f748f (patch)
tree603c5d9377612112cec2f9036b1f858c249162c9
parent9ce5a03ccbcc21c60a3dbc39b1dbd06b30655852 (diff)
downloadsamba-3b4d7082cb9723214fe2410dd7a1e2d11d0f748f.tar.gz
samba-3b4d7082cb9723214fe2410dd7a1e2d11d0f748f.tar.bz2
samba-3b4d7082cb9723214fe2410dd7a1e2d11d0f748f.zip
new files for head
(This used to be commit c0d4a1f5dd34e49843c879dd88fc78c7dffd9269)
-rw-r--r--source3/smbd/session.c175
-rw-r--r--source3/smbd/utmp.c575
2 files changed, 750 insertions, 0 deletions
diff --git a/source3/smbd/session.c b/source3/smbd/session.c
new file mode 100644
index 0000000000..653a3d9c02
--- /dev/null
+++ b/source3/smbd/session.c
@@ -0,0 +1,175 @@
+/*
+ Unix SMB/Netbios implementation.
+ Version 2.0
+ session handling for utmp and PAM
+ Copyright (C) tridge@samba.org 2001
+ Copyright (C) abartlet@pcug.org.au 2001
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+/* a "session" is claimed when we do a SessionSetupX operation
+ and is yielded when the corresponding vuid is destroyed.
+
+ sessions are used to populate utmp and PAM session structures
+*/
+
+#include "includes.h"
+
+#if defined(WITH_PAM) || defined(WITH_UTMP)
+
+static TDB_CONTEXT *tdb;
+struct sessionid {
+ fstring username;
+ fstring hostname;
+ fstring id_str;
+ uint32 id_num;
+ uint32 pid;
+};
+
+/* called when a session is created */
+BOOL session_claim(uint16 vuid)
+{
+ user_struct *vuser = get_valid_user_struct(vuid);
+ int i;
+ TDB_DATA data;
+ struct sessionid sessionid;
+ pstring dbuf;
+ int dlen;
+ uint32 pid = (uint32)sys_getpid();
+ TDB_DATA key;
+ fstring keystr;
+
+ vuser->session_id = 0;
+
+ /* don't register sessions for the guest user - its just too
+ expensive to go through pam session code for browsing etc */
+ if (strequal(vuser->user.unix_name,lp_guestaccount(-1))) {
+ return True;
+ }
+
+ if (!tdb) {
+ tdb = tdb_open(lock_path("sessionid.tdb"), 0, TDB_CLEAR_IF_FIRST,
+ O_RDWR | O_CREAT, 0644);
+ if (!tdb) {
+ DEBUG(1,("session_claim: failed to open sessionid tdb\n"));
+ return False;
+ }
+ }
+
+ ZERO_STRUCT(sessionid);
+
+ data.dptr = NULL;
+ data.dsize = 0;
+
+ for (i=1;i<MAX_SESSION_ID;i++) {
+ slprintf(keystr, sizeof(keystr)-1, "ID/%d", i);
+ key.dptr = keystr;
+ key.dsize = strlen(keystr)+1;
+
+ if (tdb_store(tdb, key, data, TDB_INSERT) == 0) break;
+ }
+
+ if (i == MAX_SESSION_ID) {
+ DEBUG(1,("session_claim: out of session IDs (max is %d)\n",
+ MAX_SESSION_ID));
+ return False;
+ }
+
+ fstrcpy(sessionid.username, vuser->user.unix_name);
+ fstrcpy(sessionid.hostname, lp_utmp_hostname());
+ slprintf(sessionid.id_str, sizeof(sessionid.id_str)-1, SESSION_TEMPLATE, i);
+ sessionid.id_num = i;
+ sessionid.pid = pid;
+
+ dlen = tdb_pack(dbuf, sizeof(dbuf), "fffdd",
+ sessionid.username, sessionid.hostname, sessionid.id_str,
+ sessionid.id_num, sessionid.pid);
+
+ data.dptr = dbuf;
+ data.dsize = dlen;
+ if (tdb_store(tdb, key, data, TDB_MODIFY) != 0) {
+ DEBUG(1,("session_claim: unable to create session id record\n"));
+ return False;
+ }
+
+#if WITH_PAM
+ if (!pam_session(True, sessionid.username, sessionid.id_str)) {
+ DEBUG(1,("pam_session rejected the session for %s [%s]\n",
+ sessionid.username, sessionid.id_str));
+ tdb_delete(tdb, key);
+ return False;
+ }
+#endif
+
+#if WITH_UTMP
+ if (lp_utmp()) {
+ sys_utmp_claim(sessionid.username, sessionid.hostname,
+ sessionid.id_str, sessionid.id_num);
+ }
+#endif
+
+ vuser->session_id = i;
+ return True;
+}
+
+/* called when a session is destroyed */
+void session_yield(uint16 vuid)
+{
+ user_struct *vuser = get_valid_user_struct(vuid);
+ TDB_DATA data;
+ struct sessionid sessionid;
+ TDB_DATA key;
+ fstring keystr;
+
+ if (!tdb) return;
+
+ if (vuser->session_id == 0) {
+ return;
+ }
+
+ slprintf(keystr, sizeof(keystr)-1, "ID/%d", vuser->session_id);
+
+ key.dptr = keystr;
+ key.dsize = strlen(keystr)+1;
+
+ data = tdb_fetch(tdb, key);
+ if (data.dptr == NULL) {
+ return;
+ }
+
+ tdb_unpack(data.dptr, data.dsize, "fffdd",
+ &sessionid.username, &sessionid.hostname, &sessionid.id_str,
+ &sessionid.id_num, &sessionid.pid);
+
+#if WITH_UTMP
+ if (lp_utmp()) {
+ sys_utmp_yield(sessionid.username, sessionid.hostname,
+ sessionid.id_str, sessionid.id_num);
+ }
+#endif
+
+#if WITH_PAM
+ pam_session(False, sessionid.username, sessionid.id_str);
+#endif
+
+ tdb_delete(tdb, key);
+}
+
+#else
+ /* null functions - no session support needed */
+ BOOL session_claim(uint16 vuid) { return True; }
+ void session_yield(uint16 vuid) {}
+#endif
diff --git a/source3/smbd/utmp.c b/source3/smbd/utmp.c
new file mode 100644
index 0000000000..486c7fe06e
--- /dev/null
+++ b/source3/smbd/utmp.c
@@ -0,0 +1,575 @@
+/*
+ Unix SMB/Netbios implementation.
+ Version 2.0
+ utmp routines
+ Copyright (C) T.D.Lee@durham.ac.uk 1999
+ Heavily modified by Andrew Bartlett and Tridge, April 2001
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+#ifdef WITH_UTMP
+
+/****************************************************************************
+Reflect connection status in utmp/wtmp files.
+ T.D.Lee@durham.ac.uk September 1999
+
+ With grateful thanks since then to many who have helped port it to
+ different operating systems. The variety of OS quirks thereby
+ uncovered is amazing...
+
+Hints for porting:
+ o Always attempt to use programmatic interface (pututline() etc.)
+ Indeed, at present only programmatic use is supported.
+ o The only currently supported programmatic interface to "wtmp{,x}"
+ is through "updwtmp*()" routines.
+ o The "x" (utmpx/wtmpx; HAVE_UTMPX_H) seems preferable.
+ o The HAVE_* items should identify supported features.
+ o If at all possible, avoid "if defined(MY-OS)" constructions.
+
+OS observations and status:
+ Almost every OS seems to have its own quirks.
+
+ Solaris 2.x:
+ Tested on 2.6 and 2.7; should be OK on other flavours.
+ AIX:
+ Apparently has utmpx.h but doesn't implement.
+ OSF:
+ Has utmpx.h, but (e.g.) no "getutmpx()". (Is this like AIX ?)
+ Redhat 6:
+ utmpx.h seems not to set default filenames. non-x better.
+ IRIX 6.5:
+ Not tested. Appears to have "x".
+ HP-UX 9.x:
+ Not tested. Appears to lack "x".
+ HP-UX 10.x:
+ Not tested.
+ "updwtmp*()" routines seem absent, so no current wtmp* support.
+ Has "ut_addr": probably trivial to implement (although remember
+ that IPv6 is coming...).
+
+ FreeBSD:
+ No "putut*()" type of interface.
+ No "ut_type" and associated defines.
+ Write files directly. Alternatively use its login(3)/logout(3).
+ SunOS 4:
+ Not tested. Resembles FreeBSD, but no login()/logout().
+
+lastlog:
+ Should "lastlog" files, if any, be updated?
+ BSD systems (SunOS 4, FreeBSD):
+ o Prominent mention on man pages.
+ System-V (e.g. Solaris 2):
+ o No mention on man pages, even under "man -k".
+ o Has a "/var/adm/lastlog" file, but pututxline() etc. seem
+ not to touch it.
+ o Despite downplaying (above), nevertheless has <lastlog.h>.
+ So perhaps UN*X "lastlog" facility is intended for tty/terminal only?
+
+Notes:
+ Each connection requires a small number (starting at 0, working up)
+ to represent the line (unum). This must be unique within and across
+ all smbd processes.
+
+ The 4 byte 'ut_id' component is vital to distinguish connections,
+ of which there could be several hundered or even thousand.
+ Entries seem to be printable characters, with optional NULL pads.
+
+ We need to be distinct from other entries in utmp/wtmp.
+
+ Observed things: therefore avoid them. Add to this list please.
+ From Solaris 2.x (because that's what I have):
+ 'sN' : run-levels; N: [0-9]
+ 'co' : console
+ 'CC' : arbitrary things; C: [a-z]
+ 'rXNN' : rlogin; N: [0-9]; X: [0-9a-z]
+ 'tXNN' : rlogin; N: [0-9]; X: [0-9a-z]
+ '/NNN' : Solaris CDE
+ 'ftpZ' : ftp (Z is the number 255, aka 0377, aka 0xff)
+ Mostly a record uses the same 'ut_id' in both "utmp" and "wtmp",
+ but differences have been seen.
+
+ Arbitrarily I have chosen to use a distinctive 'SM' for the
+ first two bytes.
+
+ The remaining two encode the "unum" (see above).
+
+ For "utmp consolidate" the suggestion was made to encode the pid into
+ those remaining two bytes (16 bits). But recent UNIX (e.g Solaris 8)
+ is migrating to pids > 16 bits, so we ought not to do this.
+
+****************************************************************************/
+
+#include <utmp.h>
+
+#ifdef HAVE_UTMPX_H
+#include <utmpx.h>
+#endif
+
+/* BSD systems: some may need lastlog.h (SunOS 4), some may not (FreeBSD) */
+/* Some System-V systems (e.g. Solaris 2) declare this too. */
+#ifdef HAVE_LASTLOG_H
+#include <lastlog.h>
+#endif
+
+/****************************************************************************
+obtain/release a small number (0 upwards) unique within and across smbds
+****************************************************************************/
+/*
+ * Need a "small" number to represent this connection, unique within this
+ * smbd and across all smbds.
+ *
+ * claim:
+ * Start at 0, hunt up for free, unique number "unum" by attempting to
+ * store it as a key in a tdb database:
+ * key: unum data: pid+conn
+ * Also store its inverse, ready for yield function:
+ * key: pid+conn data: unum
+ *
+ * yield:
+ * Find key: pid+conn; data is unum; delete record
+ * Find key: unum ; delete record.
+ *
+ * Comment:
+ * The claim algorithm (a "for" loop attempting to store numbers in a tdb
+ * database) will be increasingly inefficient with larger numbers of
+ * connections. Is it possible to write a suitable primitive within tdb?
+ *
+ * However, by also storing the inverse key/data pair, we at least make
+ * the yield algorithm efficient.
+ */
+
+/****************************************************************************
+Default paths to various {u,w}tmp{,x} files
+****************************************************************************/
+#ifdef HAVE_UTMPX_H
+
+static const char *ux_pathname =
+# if defined (UTMPX_FILE)
+ UTMPX_FILE ;
+# elif defined (_UTMPX_FILE)
+ _UTMPX_FILE ;
+# elif defined (_PATH_UTMPX)
+ _PATH_UTMPX ;
+# else
+ "" ;
+# endif
+
+static const char *wx_pathname =
+# if defined (WTMPX_FILE)
+ WTMPX_FILE ;
+# elif defined (_WTMPX_FILE)
+ _WTMPX_FILE ;
+# elif defined (_PATH_WTMPX)
+ _PATH_WTMPX ;
+# else
+ "" ;
+# endif
+
+#endif /* HAVE_UTMPX_H */
+
+static const char *ut_pathname =
+# if defined (UTMP_FILE)
+ UTMP_FILE ;
+# elif defined (_UTMP_FILE)
+ _UTMP_FILE ;
+# elif defined (_PATH_UTMP)
+ _PATH_UTMP ;
+# else
+ "" ;
+# endif
+
+static const char *wt_pathname =
+# if defined (WTMP_FILE)
+ WTMP_FILE ;
+# elif defined (_WTMP_FILE)
+ _WTMP_FILE ;
+# elif defined (_PATH_WTMP)
+ _PATH_WTMP ;
+# else
+ "" ;
+# endif
+
+/* BSD-like systems might want "lastlog" support. */
+/* *** Not yet implemented */
+#ifndef HAVE_PUTUTLINE /* see "pututline_my()" */
+static const char *ll_pathname =
+# if defined (_PATH_LASTLOG) /* what other names (if any?) */
+ _PATH_LASTLOG ;
+# else
+ "" ;
+# endif /* _PATH_LASTLOG */
+#endif /* HAVE_PUTUTLINE */
+
+/*
+ * Get name of {u,w}tmp{,x} file.
+ * return: fname contains filename
+ * Possibly empty if this code not yet ported to this system.
+ *
+ * utmp{,x}: try "utmp dir", then default (a define)
+ * wtmp{,x}: try "wtmp dir", then "utmp dir", then default (a define)
+ */
+static void uw_pathname(pstring fname, const char *uw_name, const char *uw_default)
+{
+ pstring dirname;
+
+ pstrcpy(dirname, "");
+
+ /* For w-files, first look for explicit "wtmp dir" */
+ if (uw_name[0] == 'w') {
+ pstrcpy(dirname,lp_wtmpdir());
+ trim_string(dirname,"","/");
+ }
+
+ /* For u-files and non-explicit w-dir, look for "utmp dir" */
+ if (dirname == 0 || strlen(dirname) == 0) {
+ pstrcpy(dirname,lp_utmpdir());
+ trim_string(dirname,"","/");
+ }
+
+ /* If explicit directory above, use it */
+ if (dirname != 0 && strlen(dirname) != 0) {
+ pstrcpy(fname, dirname);
+ pstrcat(fname, "/");
+ pstrcat(fname, uw_name);
+ return;
+ }
+
+ /* No explicit directory: attempt to use default paths */
+ if (strlen(uw_default) == 0) {
+ /* No explicit setting, no known default.
+ * Has it yet been ported to this OS?
+ */
+ DEBUG(2,("uw_pathname: unable to determine pathname\n"));
+ }
+ pstrcpy(fname, uw_default);
+}
+
+#ifndef HAVE_PUTUTLINE
+/****************************************************************************
+Update utmp file directly. No subroutine interface: probably a BSD system.
+****************************************************************************/
+static void pututline_my(pstring uname, struct utmp *u, BOOL claim)
+{
+ DEBUG(1,("pututline_my: not yet implemented\n"));
+ /* BSD implementor: may want to consider (or not) adjusting "lastlog" */
+}
+#endif /* HAVE_PUTUTLINE */
+
+#ifndef HAVE_UPDWTMP
+/****************************************************************************
+Update wtmp file directly. No subroutine interface: probably a BSD system.
+Credit: Michail Vidiassov <master@iaas.msu.ru>
+****************************************************************************/
+static void updwtmp_my(pstring wname, struct utmp *u, BOOL claim)
+{
+ int fd;
+ struct stat buf;
+
+ if (! claim) {
+ /*
+ * BSD-like systems:
+ * may use empty ut_name to distinguish a logout record.
+ *
+ * May need "if defined(SUNOS4)" etc. around some of these,
+ * but try to avoid if possible.
+ *
+ * SunOS 4:
+ * man page indicates ut_name and ut_host both NULL
+ * FreeBSD 4.0:
+ * man page appears not to specify (hints non-NULL)
+ * A correspondent suggest at least ut_name should be NULL
+ */
+ memset((char *)&(u->ut_name), '\0', sizeof(u->ut_name));
+ memset((char *)&(u->ut_host), '\0', sizeof(u->ut_host));
+ }
+ /* Stolen from logwtmp function in libutil.
+ * May be more locking/blocking is needed?
+ */
+ if ((fd = open(wname, O_WRONLY|O_APPEND, 0)) < 0)
+ return;
+ if (fstat(fd, &buf) == 0) {
+ if (write(fd, (char *)u, sizeof(struct utmp)) != sizeof(struct utmp))
+ (void) ftruncate(fd, buf.st_size);
+ }
+ (void) close(fd);
+}
+#endif /* HAVE_UPDWTMP */
+
+/****************************************************************************
+Update via utmp/wtmp (not utmpx/wtmpx)
+****************************************************************************/
+static void utmp_nox_update(struct utmp *u, const char *host, BOOL claim)
+{
+ pstring uname, wname;
+#if defined(PUTUTLINE_RETURNS_UTMP)
+ struct utmp *urc;
+#endif /* PUTUTLINE_RETURNS_UTMP */
+
+ uw_pathname(uname, "utmp", ut_pathname);
+ DEBUG(2,("utmp_nox_update: uname:%s\n", uname));
+
+#ifdef HAVE_PUTUTLINE
+ if (strlen(uname) != 0) {
+ utmpname(uname);
+ }
+
+# if defined(PUTUTLINE_RETURNS_UTMP)
+ setutent();
+ urc = pututline(u);
+ endutent();
+ if (urc == NULL) {
+ DEBUG(2,("utmp_nox_update: pututline() failed\n"));
+ return;
+ }
+# else /* PUTUTLINE_RETURNS_UTMP */
+ setutent();
+ pututline(u);
+ endutent();
+# endif /* PUTUTLINE_RETURNS_UTMP */
+
+#else /* HAVE_PUTUTLINE */
+ if (strlen(uname) != 0) {
+ pututline_my(uname, u, claim);
+ }
+#endif /* HAVE_PUTUTLINE */
+
+ uw_pathname(wname, "wtmp", wt_pathname);
+ DEBUG(2,("utmp_nox_update: wname:%s\n", wname));
+ if (strlen(wname) != 0) {
+#ifdef HAVE_UPDWTMP
+ updwtmp(wname, u);
+ /*
+ * updwtmp() and the newer updwtmpx() may be unsymmetrical.
+ * At least one OS, Solaris 2.x declares the former in the
+ * "utmpx" (latter) file and context.
+ * In the Solaris case this is irrelevant: it has both and
+ * we always prefer the "x" case, so doesn't come here.
+ * But are there other systems, with no "x", which lack
+ * updwtmp() perhaps?
+ */
+#else
+ updwtmp_my(wname, u, claim);
+#endif /* HAVE_UPDWTMP */
+ }
+}
+
+/****************************************************************************
+Update via utmpx/wtmpx (preferred) or via utmp/wtmp
+****************************************************************************/
+static void sys_utmp_update(struct utmp *u, const char *hostname, BOOL claim)
+{
+#if !defined(HAVE_UTMPX_H)
+ /* No utmpx stuff. Drop to non-x stuff */
+ utmp_nox_update(u, hostname, claim);
+#elif !defined(HAVE_PUTUTXLINE)
+ /* Odd. Have utmpx.h but no "pututxline()". Drop to non-x stuff */
+ DEBUG(1,("utmp_update: have utmpx.h but no pututxline() function\n"));
+ utmp_nox_update(u, hostname, claim);
+#elif !defined(HAVE_GETUTMPX)
+ /* Odd. Have utmpx.h but no "getutmpx()". Drop to non-x stuff */
+ DEBUG(1,("utmp_update: have utmpx.h but no getutmpx() function\n"));
+ utmp_nox_update(u, hostname, claim);
+#else
+ pstring uname, wname;
+ struct utmpx ux, *uxrc;
+
+ getutmpx(u, &ux);
+
+#if defined(HAVE_UX_UT_SYSLEN)
+ ux.ut_syslen = strlen(hostname) + 1; /* include end NULL */
+#endif
+ safe_strcpy(ux.ut_host, hostname, sizeof(ux.ut_host)-1);
+
+ uw_pathname(uname, "utmpx", ux_pathname);
+ uw_pathname(wname, "wtmpx", wx_pathname);
+ DEBUG(2,("utmp_update: uname:%s wname:%s\n", uname, wname));
+ /*
+ * Check for either uname or wname being empty.
+ * Some systems, such as Redhat 6, have a "utmpx.h" which doesn't
+ * define default filenames.
+ * Also, our local installation has not provided an override.
+ * Drop to non-x method. (E.g. RH6 has good defaults in "utmp.h".)
+ */
+ if ((strlen(uname) == 0) || (strlen(wname) == 0)) {
+ utmp_nox_update(u, hostname, claim);
+ } else {
+ utmpxname(uname);
+ setutxent();
+ uxrc = pututxline(&ux);
+ endutxent();
+ if (uxrc == NULL) {
+ DEBUG(2,("utmp_update: pututxline() failed\n"));
+ return;
+ }
+ updwtmpx(wname, &ux);
+ }
+#endif /* HAVE_UTMPX_H */
+}
+
+#if defined(HAVE_UT_UT_ID)
+/****************************************************************************
+encode the unique connection number into "ut_id"
+****************************************************************************/
+static int ut_id_encode(int i, char *fourbyte)
+{
+ int nbase;
+ char *ut_id_encstr = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
+
+ fourbyte[0] = 'S';
+ fourbyte[1] = 'M';
+
+/*
+ * Encode remaining 2 bytes from 'i'.
+ * 'ut_id_encstr' is the character set on which modulo arithmetic is done.
+ * Example: digits would produce the base-10 numbers from '001'.
+ */
+ nbase = strlen(ut_id_encstr);
+
+ fourbyte[3] = ut_id_encstr[i % nbase];
+ i /= nbase;
+ fourbyte[2] = ut_id_encstr[i % nbase];
+ i /= nbase;
+
+ return(i); /* 0: good; else overflow */
+}
+#endif /* defined(HAVE_UT_UT_ID) */
+
+
+/*
+ fill a system utmp structure given all the info we can gather
+*/
+static BOOL sys_utmp_fill(struct utmp *u,
+ const char *username, const char *hostname,
+ const char *id_str, int id_num)
+{
+ struct timeval timeval;
+
+ /*
+ * ut_name, ut_user:
+ * Several (all?) systems seems to define one as the other.
+ * It is easier and clearer simply to let the following take its course,
+ * rather than to try to detect and optimise.
+ */
+#if defined(HAVE_UT_UT_USER)
+ safe_strcpy(u->ut_user, username, sizeof(u->ut_user)-1);
+#elif defined(HAVE_UT_UT_NAME)
+ safe_strcpy(u->ut_name, username, sizeof(u->ut_name)-1);
+#endif
+
+ /*
+ * ut_line:
+ * If size limit proves troublesome, then perhaps use "ut_id_encode()".
+ *
+ * Temporary variable "line_tmp" avoids trouble:
+ * o with unwanted trailing NULL if ut_line full;
+ * o with overflow if ut_line would be more than full.
+ */
+ if (strlen(id_str) > sizeof(u->ut_line)) {
+ DEBUG(1,("id_str [%s] is too long for %d char utmp field\n",
+ id_str, sizeof(u->ut_line)));
+ return False;
+ }
+ memcpy(u->ut_line, id_str, sizeof(u->ut_line));
+
+#if defined(HAVE_UT_UT_PID)
+ u->ut_pid = sys_getpid();
+#endif
+
+/*
+ * ut_time, ut_tv:
+ * Some have one, some the other. Many have both, but defined (aliased).
+ * It is easier and clearer simply to let the following take its course.
+ * But note that we do the more precise ut_tv as the final assignment.
+ */
+#if defined(HAVE_UT_UT_TIME)
+ gettimeofday(&timeval, NULL);
+ u->ut_time = timeval.tv_sec;
+#elif defined(HAVE_UT_UT_TV)
+ gettimeofday(&timeval, NULL);
+ u->ut_tv = timeval;
+#else
+#error "with-utmp must have UT_TIME or UT_TV"
+#endif
+
+#if defined(HAVE_UT_UT_HOST)
+ safe_strcpy(u->ut_host, hostname, sizeof(u->ut_host)-1);
+#endif
+
+#if defined(HAVE_UT_UT_ADDR)
+ /*
+ * "(unsigned long) ut_addr" apparently exists on at least HP-UX 10.20.
+ * Volunteer to implement, please ...
+ */
+#endif
+
+#if defined(HAVE_UT_UT_ID)
+ if (ut_id_encode(id_num, u->ut_id) != 0) {
+ DEBUG(1,("utmp_fill: cannot encode id %d\n", id_num));
+ return False;
+ }
+#endif
+
+ return True;
+}
+
+/****************************************************************************
+close a connection
+****************************************************************************/
+void sys_utmp_yield(const char *username, const char *hostname,
+ const char *id_str, int id_num)
+{
+ struct utmp u;
+
+ ZERO_STRUCT(u);
+
+#if defined(HAVE_UT_UT_EXIT)
+ u.ut_exit.e_termination = 0;
+ u.ut_exit.e_exit = 0;
+#endif
+
+#if defined(HAVE_UT_UT_TYPE)
+ u.ut_type = DEAD_PROCESS;
+#endif
+
+ if (!sys_utmp_fill(&u, username, hostname, id_str, id_num)) return;
+
+ sys_utmp_update(&u, NULL, False);
+}
+
+/****************************************************************************
+claim a entry in whatever utmp system the OS uses
+****************************************************************************/
+void sys_utmp_claim(const char *username, const char *hostname,
+ const char *id_str, int id_num)
+{
+ struct utmp u;
+
+ ZERO_STRUCT(u);
+
+#if defined(HAVE_UT_UT_TYPE)
+ u.ut_type = USER_PROCESS;
+#endif
+
+ if (!sys_utmp_fill(&u, username, hostname, id_str, id_num)) return;
+
+ sys_utmp_update(&u, hostname, True);
+}
+
+#else /* WITH_UTMP */
+ void dummy_utmp(void) {}
+#endif