smbd/utmp.c

ソースコードを見る。

関数
void	sys_utmp_claim (const char *username, const char *hostname, struct in_addr *ipaddr, const char *id_str, int id_num)
void	sys_utmp_yield (const char *username, const char *hostname, struct in_addr *ipaddr, const char *id_str, int id_num)
static void	uw_pathname (pstring fname, const char *uw_name, const char *uw_default)
static void	pututline_my (pstring uname, struct utmp *u, BOOL claim)
static void	updwtmp_my (pstring wname, struct utmp *u, BOOL claim)
static void	utmp_nox_update (struct utmp *u, BOOL claim)
static void	utmp_strcpy (char *dest, const char *src, size_t n)
static void	sys_utmp_update (struct utmp *u, const char *hostname, BOOL claim)
static int	ut_id_encode (int i, char *fourbyte)
static BOOL	sys_utmp_fill (struct utmp *u, const char *username, const char *hostname, struct in_addr *ipaddr, const char *id_str, int id_num)
変数
static const char *	ux_pathname
	_UTMPX_FILE
	_PATH_UTMPX
static const char *	wx_pathname
	_WTMPX_FILE
	_PATH_WTMPX
static const char *	ut_pathname
	_UTMP_FILE
	_PATH_UTMP
static const char *	wt_pathname
	_WTMP_FILE
	_PATH_WTMP
static const char *	ll_pathname

---

関数

void sys_utmp_claim	(	const char *	username,
		const char *	hostname,
		struct in_addr *	ipaddr,
		const char *	id_str,
		int	id_num
	)

utmp.c の 116 行で定義されています。

参照元 session_claim().

{}

void sys_utmp_yield	(	const char *	username,
		const char *	hostname,
		struct in_addr *	ipaddr,
		const char *	id_str,
		int	id_num
	)

utmp.c の 121 行で定義されています。

参照元 session_yield().

{}

static void uw_pathname	(	pstring	fname,
		const char *	uw_name,
		const char *	uw_default
	)			[static]

utmp.c の 211 行で定義されています。

参照先 trim_char().

参照元 sys_utmp_update()・utmp_nox_update().

{
        pstring dirname;

        pstrcpy(dirname, "");

        /* For w-files, first look for explicit "wtmp dir" */
        if (uw_name[0] == 'w') {
                pstrcpy(dirname,lp_wtmpdir());
                trim_char(dirname,'\0','/');
        }

        /* For u-files and non-explicit w-dir, look for "utmp dir" */
        if (strlen(dirname) == 0) {
                pstrcpy(dirname,lp_utmpdir());
                trim_char(dirname,'\0','/');
        }

        /* If explicit directory above, use it */
        if (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);
}

static void pututline_my	(	pstring	uname,
		struct utmp *	u,
		BOOL	claim
	)			[static]

utmp.c の 253 行で定義されています。

参照元 utmp_nox_update().

{
        DEBUG(1,("pututline_my: not yet implemented\n"));
        /* BSD implementor: may want to consider (or not) adjusting "lastlog" */
}

static void updwtmp_my	(	pstring	wname,
		struct utmp *	u,
		BOOL	claim
	)			[static]

utmp.c の 267 行で定義されています。

参照先 fd.

参照元 utmp_nox_update().

{
        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
                 */
#if defined(HAVE_UT_UT_NAME)
                memset((char *)&u->ut_name, '\0', sizeof(u->ut_name));
#endif
#if defined(HAVE_UT_UT_HOST)
                memset((char *)&u->ut_host, '\0', sizeof(u->ut_host));
#endif
        }
        /* 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);
}

static void utmp_nox_update	(	struct utmp *	u,
		BOOL	claim
	)			[static]

utmp.c の 310 行で定義されています。

参照先 pututline_my()・updwtmp_my()・ut_pathname・uw_pathname()・wt_pathname.

参照元 sys_utmp_update().

{
        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 */
        }
}

static void utmp_strcpy	(	char *	dest,
		const char *	src,
		size_t	n
	)			[static]

utmp.c の 369 行で定義されています。

参照先 len.

参照元 sys_utmp_fill()・sys_utmp_update().

{
        size_t len = 0;

        memset(dest, '\0', n);
        if (src)
                len = strlen(src);
        if (len >= n) {
                memcpy(dest, src, n);
        } else {
                if (len)
                        memcpy(dest, src, len);
        }
}

static void sys_utmp_update	(	struct utmp *	u,
		const char *	hostname,
		BOOL	claim
	)			[static]

utmp.c の 388 行で定義されています。

参照先 utmp_nox_update()・utmp_strcpy()・uw_pathname()・ux_pathname・wx_pathname.

{
#if !defined(HAVE_UTMPX_H)
        /* No utmpx stuff.  Drop to non-x stuff */
        utmp_nox_update(u, 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, 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, claim);
#else
        pstring uname, wname;
        struct utmpx ux, *uxrc;

        getutmpx(u, &ux);

#if defined(HAVE_UX_UT_SYSLEN)
        if (hostname)
                ux.ut_syslen = strlen(hostname) + 1;    /* include end NULL */
        else
                ux.ut_syslen = 0;
#endif
#if defined(HAVE_UT_UT_HOST)
        utmp_strcpy(ux.ut_host, hostname, sizeof(ux.ut_host));
#endif

        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, 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 */
}

static int ut_id_encode	(	int	i,
		char *	fourbyte
	)			[static]

utmp.c の 448 行で定義されています。

参照元 sys_utmp_fill().

{
        int nbase;
        const 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 */
}

static BOOL sys_utmp_fill	(	struct utmp *	u,
		const char *	username,
		const char *	hostname,
		struct in_addr *	ipaddr,
		const char *	id_str,
		int	id_num
	)			[static]

utmp.c の 476 行で定義されています。

参照先 GetTimeOfDay()・sys_getpid()・ut_id_encode()・utmp_strcpy().

{                         
        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)
        utmp_strcpy(u->ut_user, username, sizeof(u->ut_user));
#elif defined(HAVE_UT_UT_NAME)
        utmp_strcpy(u->ut_name, username, sizeof(u->ut_name));
#endif

        /*
         * ut_line:
         *      If size limit proves troublesome, then perhaps use "ut_id_encode()".
         */
        if (strlen(id_str) > sizeof(u->ut_line)) {
                DEBUG(1,("id_str [%s] is too long for %lu char utmp field\n",
                         id_str, (unsigned long)sizeof(u->ut_line)));
                return False;
        }
        utmp_strcpy(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);
        u->ut_time = timeval.tv_sec;
#elif defined(HAVE_UT_UT_TV)
        GetTimeOfDay(&timeval);
        u->ut_tv = timeval;
#else
#error "with-utmp must have UT_TIME or UT_TV"
#endif

#if defined(HAVE_UT_UT_HOST)
        utmp_strcpy(u->ut_host, hostname, sizeof(u->ut_host));
#endif
#if defined(HAVE_UT_UT_ADDR)
        if (ipaddr)
                u->ut_addr = ipaddr->s_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;
}

---

変数

const char* ux_pathname [static]

初期値:

# if defined (UTMPX_FILE)
        UTMPX_FILE

utmp.c の 146 行で定義されています。

参照元 sys_utmp_update().

_UTMPX_FILE

utmp.c の 150 行で定義されています。

_PATH_UTMPX

utmp.c の 152 行で定義されています。

const char* wx_pathname [static]

初期値:

# if defined (WTMPX_FILE)
        WTMPX_FILE

utmp.c の 157 行で定義されています。

参照元 sys_utmp_update().

_WTMPX_FILE

utmp.c の 161 行で定義されています。

_PATH_WTMPX

utmp.c の 163 行で定義されています。

const char* ut_pathname [static]

初期値:

# if defined (UTMP_FILE)
        UTMP_FILE

utmp.c の 170 行で定義されています。

参照元 utmp_nox_update().

_UTMP_FILE

utmp.c の 174 行で定義されています。

_PATH_UTMP

utmp.c の 176 行で定義されています。

const char* wt_pathname [static]

初期値:

# if defined (WTMP_FILE)
        WTMP_FILE

utmp.c の 181 行で定義されています。

参照元 utmp_nox_update().

_WTMP_FILE

utmp.c の 185 行で定義されています。

_PATH_WTMP

utmp.c の 187 行で定義されています。

const char* ll_pathname [static]

初期値:

# if defined (_PATH_LASTLOG)    
        _PATH_LASTLOG

utmp.c の 195 行で定義されています。

---