* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by Markus Friedl.
- * 4. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-/**
- ** loginrec.c: platform-independent login recording and lastlog retrieval
- **/
-
/*
- The new login code explained
- ============================
-
- This code attempts to provide a common interface to login recording
- (utmp and friends) and last login time retrieval.
-
- Its primary means of achieving this is to use 'struct logininfo', a
- union of all the useful fields in the various different types of
- system login record structures one finds on UNIX variants.
-
- We depend on autoconf to define which recording methods are to be
- used, and which fields are contained in the relevant data structures
- on the local system. Many C preprocessor symbols affect which code
- gets compiled here.
-
- The code is designed to make it easy to modify a particular
- recording method, without affecting other methods nor requiring so
- many nested conditional compilation blocks as were commonplace in
- the old code.
-
- For login recording, we try to use the local system's libraries as
- these are clearly most likely to work correctly. For utmp systems
- this usually means login() and logout() or setutent() etc., probably
- in libutil, along with logwtmp() etc. On these systems, we fall back
- to writing the files directly if we have to, though this method
- requires very thorough testing so we do not corrupt local auditing
- information. These files and their access methods are very system
- specific indeed.
-
- For utmpx systems, the corresponding library functions are
- setutxent() etc. To the author's knowledge, all utmpx systems have
- these library functions and so no direct write is attempted. If such
- a system exists and needs support, direct analogues of the [uw]tmp
- code should suffice.
-
- Retrieving the time of last login ('lastlog') is in some ways even
- more problemmatic than login recording. Some systems provide a
- simple table of all users which we seek based on uid and retrieve a
- relatively standard structure. Others record the same information in
- a directory with a separate file, and others don't record the
- information separately at all. For systems in the latter category,
- we look backwards in the wtmp or wtmpx file for the last login entry
- for our user. Naturally this is slower and on busy systems could
- incur a significant performance penalty.
-
- Calling the new code
- --------------------
-
- In OpenSSH all login recording and retrieval is performed in
- login.c. Here you'll find working examples. Also, in the logintest.c
- program there are more examples.
-
- Internal handler calling method
- -------------------------------
-
- When a call is made to login_login() or login_logout(), both
- routines set a struct logininfo flag defining which action (log in,
- or log out) is to be taken. They both then call login_write(), which
- calls whichever of the many structure-specific handlers autoconf
- selects for the local system.
-
- The handlers themselves handle system data structure specifics. Both
- struct utmp and struct utmpx have utility functions (see
- construct_utmp*()) to try to make it simpler to add extra systems
- that introduce new features to either structure.
-
- While it may seem terribly wasteful to replicate so much similar
- code for each method, experience has shown that maintaining code to
- write both struct utmp and utmpx in one function, whilst maintaining
- support for all systems whether they have library support or not, is
- a difficult and time-consuming task.
-
- Lastlog support proceeds similarly. Functions login_get_lastlog()
- (and its OpenSSH-tuned friend login_get_lastlog_time()) call
- getlast_entry(), which tries one of three methods to find the last
- login time. It uses local system lastlog support if it can,
- otherwise it tries wtmp or wtmpx before giving up and returning 0,
- meaning "tilt".
-
- Maintenance
- -----------
-
- In many cases it's possible to tweak autoconf to select the correct
- methods for a particular platform, either by improving the detection
- code (best), or by presetting DISABLE_<method> or CONF_<method>_FILE
- symbols for the platform.
-
- Use logintest to check which symbols are defined before modifying
- configure.in and loginrec.c. (You have to build logintest yourself
- with 'make logintest' as it's not built by default.)
-
- Otherwise, patches to the specific method(s) are very helpful!
-
-*/
+ * The btmp logging code is derived from login.c from util-linux and is under
+ * the the following license:
+ *
+ * Copyright (c) 1980, 1987, 1988 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley. The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
/**
- ** TODO:
- ** homegrown ttyslot()q
- ** test, test, test
- **
- ** Platform status:
- ** ----------------
- **
- ** Known good:
- ** Linux (Redhat 6.2, need more variants)
- ** HP-UX 10.20 (gcc only)
- ** IRIX
- **
- ** Testing required: Please send reports!
- ** Solaris
- ** NetBSD
- ** HP-UX 11
- ** AIX
- **
- ** Platforms with known problems:
- ** NeXT
- **
+ ** loginrec.c: platform-independent login recording and lastlog retrieval
**/
+/*
+ * The new login code explained
+ * ============================
+ *
+ * This code attempts to provide a common interface to login recording
+ * (utmp and friends) and last login time retrieval.
+ *
+ * Its primary means of achieving this is to use 'struct logininfo', a
+ * union of all the useful fields in the various different types of
+ * system login record structures one finds on UNIX variants.
+ *
+ * We depend on autoconf to define which recording methods are to be
+ * used, and which fields are contained in the relevant data structures
+ * on the local system. Many C preprocessor symbols affect which code
+ * gets compiled here.
+ *
+ * The code is designed to make it easy to modify a particular
+ * recording method, without affecting other methods nor requiring so
+ * many nested conditional compilation blocks as were commonplace in
+ * the old code.
+ *
+ * For login recording, we try to use the local system's libraries as
+ * these are clearly most likely to work correctly. For utmp systems
+ * this usually means login() and logout() or setutent() etc., probably
+ * in libutil, along with logwtmp() etc. On these systems, we fall back
+ * to writing the files directly if we have to, though this method
+ * requires very thorough testing so we do not corrupt local auditing
+ * information. These files and their access methods are very system
+ * specific indeed.
+ *
+ * For utmpx systems, the corresponding library functions are
+ * setutxent() etc. To the author's knowledge, all utmpx systems have
+ * these library functions and so no direct write is attempted. If such
+ * a system exists and needs support, direct analogues of the [uw]tmp
+ * code should suffice.
+ *
+ * Retrieving the time of last login ('lastlog') is in some ways even
+ * more problemmatic than login recording. Some systems provide a
+ * simple table of all users which we seek based on uid and retrieve a
+ * relatively standard structure. Others record the same information in
+ * a directory with a separate file, and others don't record the
+ * information separately at all. For systems in the latter category,
+ * we look backwards in the wtmp or wtmpx file for the last login entry
+ * for our user. Naturally this is slower and on busy systems could
+ * incur a significant performance penalty.
+ *
+ * Calling the new code
+ * --------------------
+ *
+ * In OpenSSH all login recording and retrieval is performed in
+ * login.c. Here you'll find working examples. Also, in the logintest.c
+ * program there are more examples.
+ *
+ * Internal handler calling method
+ * -------------------------------
+ *
+ * When a call is made to login_login() or login_logout(), both
+ * routines set a struct logininfo flag defining which action (log in,
+ * or log out) is to be taken. They both then call login_write(), which
+ * calls whichever of the many structure-specific handlers autoconf
+ * selects for the local system.
+ *
+ * The handlers themselves handle system data structure specifics. Both
+ * struct utmp and struct utmpx have utility functions (see
+ * construct_utmp*()) to try to make it simpler to add extra systems
+ * that introduce new features to either structure.
+ *
+ * While it may seem terribly wasteful to replicate so much similar
+ * code for each method, experience has shown that maintaining code to
+ * write both struct utmp and utmpx in one function, whilst maintaining
+ * support for all systems whether they have library support or not, is
+ * a difficult and time-consuming task.
+ *
+ * Lastlog support proceeds similarly. Functions login_get_lastlog()
+ * (and its OpenSSH-tuned friend login_get_lastlog_time()) call
+ * getlast_entry(), which tries one of three methods to find the last
+ * login time. It uses local system lastlog support if it can,
+ * otherwise it tries wtmp or wtmpx before giving up and returning 0,
+ * meaning "tilt".
+ *
+ * Maintenance
+ * -----------
+ *
+ * In many cases it's possible to tweak autoconf to select the correct
+ * methods for a particular platform, either by improving the detection
+ * code (best), or by presetting DISABLE_<method> or CONF_<method>_FILE
+ * symbols for the platform.
+ *
+ * Use logintest to check which symbols are defined before modifying
+ * configure.ac and loginrec.c. (You have to build logintest yourself
+ * with 'make logintest' as it's not built by default.)
+ *
+ * Otherwise, patches to the specific method(s) are very helpful!
+ */
+
#include "includes.h"
-#if HAVE_UTMP_H
-# include <utmp.h>
-#endif
-#if HAVE_UTMPX_H
-# include <utmpx.h>
-#endif
-#if HAVE_LASTLOG_H
-# include <lastlog.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#ifdef HAVE_PATHS_H
+# include <paths.h>
#endif
+#include <pwd.h>
+#include <stdarg.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
-#include "ssh.h"
#include "xmalloc.h"
+#include "key.h"
+#include "hostfile.h"
+#include "ssh.h"
#include "loginrec.h"
+#include "log.h"
+#include "atomicio.h"
+#include "packet.h"
+#include "canohost.h"
+#include "auth.h"
+#include "buffer.h"
+
+#ifdef HAVE_UTIL_H
+# include <util.h>
+#endif
-RCSID("$Id$");
+#ifdef HAVE_LIBUTIL_H
+# include <libutil.h>
+#endif
/**
** prototypes for helper functions in this file
int wtmp_get_entry(struct logininfo *li);
int wtmpx_get_entry(struct logininfo *li);
-
-#ifdef MIN
-# undef MIN
-# define MIN(a,b) ( (a)<(b) ? (a) : (b) )
-#endif
+extern Buffer loginmsg;
/* pick the shortest string */
-#define MIN_SIZEOF(s1,s2) ( sizeof(s1) < sizeof(s2) ? sizeof(s1) : sizeof(s2) )
-
+#define MIN_SIZEOF(s1,s2) (sizeof(s1) < sizeof(s2) ? sizeof(s1) : sizeof(s2))
/**
** platform-independent login functions
**/
-/* login_login(struct logininfo *) -Record a login
- *
+/*
+ * login_login(struct logininfo *) - Record a login
+ *
* Call with a pointer to a struct logininfo initialised with
* login_init_entry() or login_alloc_entry()
*
* 0 on failure (will use OpenSSH's logging facilities for diagnostics)
*/
int
-login_login (struct logininfo *li)
+login_login(struct logininfo *li)
{
li->type = LTYPE_LOGIN;
- return login_write(li);
+ return (login_write(li));
}
-/* login_logout(struct logininfo *) - Record a logout
+/*
+ * login_logout(struct logininfo *) - Record a logout
*
* Call as with login_login()
*
login_logout(struct logininfo *li)
{
li->type = LTYPE_LOGOUT;
- return login_write(li);
+ return (login_write(li));
}
-
-/* login_get_lastlog_time(int) - Retrieve the last login time
+/*
+ * login_get_lastlog_time(int) - Retrieve the last login time
*
* Retrieve the last login time for the given uid. Will try to use the
* system lastlog facilities if they are available, but will fall back
struct logininfo li;
if (login_get_lastlog(&li, uid))
- return li.tv_sec;
+ return (li.tv_sec);
else
- return 0;
+ return (0);
}
-/* login_get_lastlog(struct logininfo *, int) - Retrieve a lastlog entry
+/*
+ * login_get_lastlog(struct logininfo *, int) - Retrieve a lastlog entry
*
* Retrieve a logininfo structure populated (only partially) with
* information from the system lastlog data, or from wtmp/wtmpx if no
* Returns:
* >0: A pointer to your struct logininfo if successful
* 0 on failure (will use OpenSSH's logging facilities for diagnostics)
- *
*/
struct logininfo *
login_get_lastlog(struct logininfo *li, const int uid)
{
-#ifndef USE_LASTLOG
struct passwd *pw;
-#endif
- memset(li, '\0', sizeof(struct logininfo));
+ memset(li, '\0', sizeof(*li));
li->uid = uid;
-#ifndef USE_LASTLOG
- /* If we don't have a 'real' lastlog, we need the username to
+ /*
+ * If we don't have a 'real' lastlog, we need the username to
* reliably search wtmp(x) for the last login (see
- * wtmp_get_entry().) */
+ * wtmp_get_entry().)
+ */
pw = getpwuid(uid);
+ if (pw == NULL)
+ fatal("%s: Cannot find account for uid %i", __func__, uid);
+
/* No MIN_SIZEOF here - we absolutely *must not* truncate the
- * username */
- strlcpy(li->username, pw->pw_name, li->username);
-#endif
+ * username (XXX - so check for trunc!) */
+ strlcpy(li->username, pw->pw_name, sizeof(li->username));
+
if (getlast_entry(li))
- return li;
+ return (li);
else
- return 0;
+ return (NULL);
}
-/* login_alloc_entry(int, char*, char*, char*) - Allocate and initialise
- * a logininfo structure
- *
+/*
+ * login_alloc_entry(int, char*, char*, char*) - Allocate and initialise
+ * a logininfo structure
+ *
* This function creates a new struct logininfo, a data structure
* meant to carry the information required to portably record login info.
*
*/
struct
logininfo *login_alloc_entry(int pid, const char *username,
- const char *hostname, const char *line)
+ const char *hostname, const char *line)
{
struct logininfo *newli;
- newli = (struct logininfo *) xmalloc (sizeof(struct logininfo));
- (void)login_init_entry(newli, pid, username, hostname, line);
- return newli;
+ newli = xmalloc(sizeof(*newli));
+ login_init_entry(newli, pid, username, hostname, line);
+ return (newli);
}
/* login_init_entry(struct logininfo *, int, char*, char*, char*)
* - initialise a struct logininfo
- *
+ *
* Populates a new struct logininfo, a data structure meant to carry
* the information required to portably record login info.
*
* Returns: 1
*/
int
-login_init_entry(struct logininfo *li, int pid, const char *username,
- const char *hostname, const char *line)
+login_init_entry(struct logininfo *li, int pid, const char *username,
+ const char *hostname, const char *line)
{
- /* zero the structure */
- memset(li, 0, sizeof(struct logininfo));
-
+ struct passwd *pw;
+
+ memset(li, 0, sizeof(*li));
+
li->pid = pid;
+
/* set the line information */
if (line)
line_fullname(li->line, line, sizeof(li->line));
- if (username)
+ if (username) {
strlcpy(li->username, username, sizeof(li->username));
+ pw = getpwnam(li->username);
+ if (pw == NULL) {
+ fatal("%s: Cannot find user \"%s\"", __func__,
+ li->username);
+ }
+ li->uid = pw->pw_uid;
+ }
+
if (hostname)
strlcpy(li->hostname, hostname, sizeof(li->hostname));
- return 1;
+
+ return (1);
}
-/* login_set_current_time(struct logininfo *) - set the current time
+/*
+ * login_set_current_time(struct logininfo *) - set the current time
*
* Set the current time in a logininfo structure. This function is
* meant to eliminate the need to deal with system dependencies for
void
login_set_current_time(struct logininfo *li)
{
-#ifdef HAVE_SYS_TIME_H
struct timeval tv;
gettimeofday(&tv, NULL);
- li->tv_sec = tv.tv_sec ; li->tv_usec = tv.tv_usec;
-#else
- time_t tm = time(0);
- li->tv_sec = tm; li->tv_usec = 0;
-#endif
+ li->tv_sec = tv.tv_sec;
+ li->tv_usec = tv.tv_usec;
}
-
/* copy a sockaddr_* into our logininfo */
void
login_set_addr(struct logininfo *li, const struct sockaddr *sa,
- const unsigned int sa_size)
+ const unsigned int sa_size)
{
unsigned int bufsize = sa_size;
if (sizeof(li->hostaddr) < sa_size)
bufsize = sizeof(li->hostaddr);
- memcpy((void *)&(li->hostaddr.sa), (const void *)sa, bufsize);
+ memcpy(&li->hostaddr.sa, sa, bufsize);
}
** login_write: Call low-level recording functions based on autoconf
** results
**/
-
int
-login_write (struct logininfo *li)
+login_write(struct logininfo *li)
{
- if ((int)geteuid() != 0) {
- log("Attempt to write login records by non-root user (aborting)");
- return 1;
+#ifndef HAVE_CYGWIN
+ if (geteuid() != 0) {
+ logit("Attempt to write login records by non-root user (aborting)");
+ return (1);
}
+#endif
+
/* set the timestamp */
login_set_current_time(li);
#ifdef USE_LOGIN
syslogin_write_entry(li);
#endif
#ifdef USE_LASTLOG
- if (li->type == LTYPE_LOGIN) {
+ if (li->type == LTYPE_LOGIN)
lastlog_write_entry(li);
- }
#endif
#ifdef USE_UTMP
utmp_write_entry(li);
#ifdef USE_WTMPX
wtmpx_write_entry(li);
#endif
- return 0;
+#ifdef CUSTOM_SYS_AUTH_RECORD_LOGIN
+ if (li->type == LTYPE_LOGIN &&
+ !sys_auth_record_login(li->username,li->hostname,li->line,
+ &loginmsg))
+ logit("Writing login record failed for %s", li->username);
+#endif
+#ifdef SSH_AUDIT_EVENTS
+ if (li->type == LTYPE_LOGIN)
+ audit_session_open(li->line);
+ else if (li->type == LTYPE_LOGOUT)
+ audit_session_close(li->line);
+#endif
+ return (0);
}
+#ifdef LOGIN_NEEDS_UTMPX
+int
+login_utmp_only(struct logininfo *li)
+{
+ li->type = LTYPE_LOGIN;
+ login_set_current_time(li);
+# ifdef USE_UTMP
+ utmp_write_entry(li);
+# endif
+# ifdef USE_WTMP
+ wtmp_write_entry(li);
+# endif
+# ifdef USE_UTMPX
+ utmpx_write_entry(li);
+# endif
+# ifdef USE_WTMPX
+ wtmpx_write_entry(li);
+# endif
+ return (0);
+}
+#endif
/**
** getlast_entry: Call low-level functions to retrieve the last login
getlast_entry(struct logininfo *li)
{
#ifdef USE_LASTLOG
- if (lastlog_get_entry(li))
- return 1;
- else
- return 0;
-#else
- /* !USE_LASTLOG */
+ return(lastlog_get_entry(li));
+#else /* !USE_LASTLOG */
-# ifdef DISABLE_LASTLOG
- /* On some systems we shouldn't even try to obtain last login
+#if defined(DISABLE_LASTLOG)
+ /* On some systems we shouldn't even try to obtain last login
* time, e.g. AIX */
- return 0;
-
-# else
- /* Try to retrieve the last login time from wtmp */
-# if defined(USE_WTMP) && (defined(HAVE_TIME_IN_UTMP) || defined(HAVE_TV_IN_UTMP))
+ return (0);
+# elif defined(USE_WTMP) && \
+ (defined(HAVE_TIME_IN_UTMP) || defined(HAVE_TV_IN_UTMP))
/* retrieve last login time from utmp */
- if (wtmp_get_entry(li))
- return 1;
- else
- return 0;
-# else
-
+ return (wtmp_get_entry(li));
+# elif defined(USE_WTMPX) && \
+ (defined(HAVE_TIME_IN_UTMPX) || defined(HAVE_TV_IN_UTMPX))
/* If wtmp isn't available, try wtmpx */
-
-# if defined(USE_WTMPX) && (defined(HAVE_TIME_IN_UTMPX) || defined(HAVE_TV_IN_UTMPX))
- /* retrieve last login time from utmpx */
- if (wtmpx_get_entry(li))
- return 1;
- else
- return 0;
-# else
-
+ return (wtmpx_get_entry(li));
+# else
/* Give up: No means of retrieving last login time */
- return 0;
-# endif
- /* USE_WTMPX && (HAVE_TIME_IN_UTMPX || HAVE_TV_IN_UTMPX) */
-
-# endif
- /* USE_WTMP && (HAVE_TIME_IN_UTMP || HAVE_TV_IN_UTMP) */
-# endif
- /* DISABLE_LASTLOG */
-#endif
-/* USE_LASTLOG */
+ return (0);
+# endif /* DISABLE_LASTLOG */
+#endif /* USE_LASTLOG */
}
*/
-/* line_fullname(): add the leading '/dev/' if it doesn't exist make
- * sure dst has enough space, if not just copy src (ugh) */
+/*
+ * line_fullname(): add the leading '/dev/' if it doesn't exist make
+ * sure dst has enough space, if not just copy src (ugh)
+ */
char *
-line_fullname(char *dst, const char *src, int dstsize)
+line_fullname(char *dst, const char *src, u_int dstsize)
{
memset(dst, '\0', dstsize);
if ((strncmp(src, "/dev/", 5) == 0) || (dstsize < (strlen(src) + 5)))
strlcpy(dst, "/dev/", dstsize);
strlcat(dst, src, dstsize);
}
- return dst;
+ return (dst);
}
-
/* line_stripname(): strip the leading '/dev' if it exists, return dst */
char *
line_stripname(char *dst, const char *src, int dstsize)
{
memset(dst, '\0', dstsize);
if (strncmp(src, "/dev/", 5) == 0)
- strlcpy(dst, &src[5], dstsize);
+ strlcpy(dst, src + 5, dstsize);
else
strlcpy(dst, src, dstsize);
- return dst;
+ return (dst);
}
-
-/* line_abbrevname(): Return the abbreviated (usually four-character)
+/*
+ * line_abbrevname(): Return the abbreviated (usually four-character)
* form of the line (Just use the last <dstsize> characters of the
* full name.)
*
* NOTE: use strncpy because we do NOT necessarily want zero
- * termination */
+ * termination
+ */
char *
-line_abbrevname(char *dst, const char *src, int dstsize) {
+line_abbrevname(char *dst, const char *src, int dstsize)
+{
+ size_t len;
+
memset(dst, '\0', dstsize);
- src += (strlen(src) - dstsize);
- strncpy(dst, src, dstsize); /* note: _don't_ change this to strlcpy */
- return dst;
-}
+ /* Always skip prefix if present */
+ if (strncmp(src, "/dev/", 5) == 0)
+ src += 5;
+
+#ifdef WITH_ABBREV_NO_TTY
+ if (strncmp(src, "tty", 3) == 0)
+ src += 3;
+#endif
+
+ len = strlen(src);
+
+ if (len > 0) {
+ if (((int)len - dstsize) > 0)
+ src += ((int)len - dstsize);
+
+ /* note: _don't_ change this to strlcpy */
+ strncpy(dst, src, (size_t)dstsize);
+ }
+
+ return (dst);
+}
/**
** utmp utility functions
void
set_utmp_time(struct logininfo *li, struct utmp *ut)
{
-#ifdef HAVE_TV_IN_UTMP
+# if defined(HAVE_TV_IN_UTMP)
ut->ut_tv.tv_sec = li->tv_sec;
ut->ut_tv.tv_usec = li->tv_usec;
-#else
-# ifdef HAVE_TIME_IN_UTMP
+# elif defined(HAVE_TIME_IN_UTMP)
ut->ut_time = li->tv_sec;
-# endif
-#endif
+# endif
}
-
void
construct_utmp(struct logininfo *li,
struct utmp *ut)
{
- memset(ut, '\0', sizeof(struct utmp));
+# ifdef HAVE_ADDR_V6_IN_UTMP
+ struct sockaddr_in6 *sa6;
+# endif
+
+ memset(ut, '\0', sizeof(*ut));
/* First fill out fields used for both logins and logouts */
-#ifdef HAVE_ID_IN_UTMP
+# ifdef HAVE_ID_IN_UTMP
line_abbrevname(ut->ut_id, li->line, sizeof(ut->ut_id));
-#endif
+# endif
-#ifdef HAVE_TYPE_IN_UTMP
+# ifdef HAVE_TYPE_IN_UTMP
/* This is done here to keep utmp constants out of struct logininfo */
switch (li->type) {
case LTYPE_LOGIN:
ut->ut_type = USER_PROCESS;
+#ifdef _UNICOS
+ cray_set_tmpdir(ut);
+#endif
break;
case LTYPE_LOGOUT:
ut->ut_type = DEAD_PROCESS;
+#ifdef _UNICOS
+ cray_retain_utmp(ut, li->pid);
+#endif
break;
}
-#endif
+# endif
set_utmp_time(li, ut);
line_stripname(ut->ut_line, li->line, sizeof(ut->ut_line));
-#ifdef HAVE_PID_IN_UTMP
+
+# ifdef HAVE_PID_IN_UTMP
ut->ut_pid = li->pid;
-#endif
+# endif
/* If we're logging out, leave all other fields blank */
if (li->type == LTYPE_LOGOUT)
- return;
+ return;
- /* These fields are only used when logging in, and are blank
- * for logouts. */
+ /*
+ * These fields are only used when logging in, and are blank
+ * for logouts.
+ */
/* Use strncpy because we don't necessarily want null termination */
- strncpy(ut->ut_user, li->username, MIN_SIZEOF(ut->ut_user, li->username));
-#ifdef HAVE_HOST_IN_UTMP
- strncpy(ut->ut_host, li->hostname, MIN_SIZEOF(ut->ut_host, li->hostname));
-#endif
-#ifdef HAVE_ADDR_IN_UTMP
+ strncpy(ut->ut_name, li->username,
+ MIN_SIZEOF(ut->ut_name, li->username));
+# ifdef HAVE_HOST_IN_UTMP
+ strncpy(ut->ut_host, li->hostname,
+ MIN_SIZEOF(ut->ut_host, li->hostname));
+# endif
+# ifdef HAVE_ADDR_IN_UTMP
/* this is just a 32-bit IP address */
if (li->hostaddr.sa.sa_family == AF_INET)
ut->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr;
-#endif
+# endif
+# ifdef HAVE_ADDR_V6_IN_UTMP
+ /* this is just a 128-bit IPv6 address */
+ if (li->hostaddr.sa.sa_family == AF_INET6) {
+ sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa);
+ memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16);
+ if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) {
+ ut->ut_addr_v6[0] = ut->ut_addr_v6[3];
+ ut->ut_addr_v6[1] = 0;
+ ut->ut_addr_v6[2] = 0;
+ ut->ut_addr_v6[3] = 0;
+ }
+ }
+# endif
}
-
-#endif
-/* USE_UTMP || USE_WTMP || USE_LOGIN */
-
-
+#endif /* USE_UTMP || USE_WTMP || USE_LOGIN */
/**
** utmpx utility functions
**/
#if defined(USE_UTMPX) || defined (USE_WTMPX)
-
/* build the utmpx structure */
void
set_utmpx_time(struct logininfo *li, struct utmpx *utx)
{
-#ifdef HAVE_TV_IN_UTMPX
+# if defined(HAVE_TV_IN_UTMPX)
utx->ut_tv.tv_sec = li->tv_sec;
utx->ut_tv.tv_usec = li->tv_usec;
-#else
-# ifdef HAVE_TIME_IN_UTMPX
+# elif defined(HAVE_TIME_IN_UTMPX)
utx->ut_time = li->tv_sec;
-# endif
-#endif
+# endif
}
-
void
construct_utmpx(struct logininfo *li, struct utmpx *utx)
{
- memset(utx, '\0', sizeof(struct utmpx));
+# ifdef HAVE_ADDR_V6_IN_UTMP
+ struct sockaddr_in6 *sa6;
+# endif
+ memset(utx, '\0', sizeof(*utx));
+
+# ifdef HAVE_ID_IN_UTMPX
line_abbrevname(utx->ut_id, li->line, sizeof(utx->ut_id));
+# endif
/* this is done here to keep utmp constants out of loginrec.h */
switch (li->type) {
set_utmpx_time(li, utx);
utx->ut_pid = li->pid;
+ /* strncpy(): Don't necessarily want null termination */
+ strncpy(utx->ut_user, li->username,
+ MIN_SIZEOF(utx->ut_user, li->username));
+
if (li->type == LTYPE_LOGOUT)
return;
- /* These fields are only used when logging in, and are blank
- * for logouts. */
+ /*
+ * These fields are only used when logging in, and are blank
+ * for logouts.
+ */
- /* strncpy(): Don't necessarily want null termination */
- strncpy(utx->ut_name, li->username, MIN_SIZEOF(utx->ut_name, li->username));
-#ifdef HAVE_HOST_IN_UTMPX
- strncpy(utx->ut_host, li->hostname, MIN_SIZEOF(utx->ut_host, li->hostname));
-#endif
-#ifdef HAVE_ADDR_IN_UTMPX
- /* FIXME: (ATL) not supported yet */
-#endif
-#ifdef HAVE_SYSLEN_IN_UTMPX
+# ifdef HAVE_HOST_IN_UTMPX
+ strncpy(utx->ut_host, li->hostname,
+ MIN_SIZEOF(utx->ut_host, li->hostname));
+# endif
+# ifdef HAVE_ADDR_IN_UTMPX
+ /* this is just a 32-bit IP address */
+ if (li->hostaddr.sa.sa_family == AF_INET)
+ utx->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr;
+# endif
+# ifdef HAVE_ADDR_V6_IN_UTMP
+ /* this is just a 128-bit IPv6 address */
+ if (li->hostaddr.sa.sa_family == AF_INET6) {
+ sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa);
+ memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16);
+ if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) {
+ ut->ut_addr_v6[0] = ut->ut_addr_v6[3];
+ ut->ut_addr_v6[1] = 0;
+ ut->ut_addr_v6[2] = 0;
+ ut->ut_addr_v6[3] = 0;
+ }
+ }
+# endif
+# ifdef HAVE_SYSLEN_IN_UTMPX
/* ut_syslen is the length of the utx_host string */
utx->ut_syslen = MIN(strlen(li->hostname), sizeof(utx->ut_host));
-#endif
+# endif
}
-
-#endif
-/* USE_UTMPX || USE_WTMPX */
-
-
+#endif /* USE_UTMPX || USE_WTMPX */
/**
** Low-level utmp functions
**/
/* FIXME: (ATL) utmp_write_direct needs testing */
-
#ifdef USE_UTMP
/* if we can, use pututline() etc. */
-#if !defined(DISABLE_PUTUTLINE) && defined(HAVE_SETUTENT) && \
- defined(HAVE_PUTUTLINE)
+# if !defined(DISABLE_PUTUTLINE) && defined(HAVE_SETUTENT) && \
+ defined(HAVE_PUTUTLINE)
# define UTMP_USE_LIBRARY
-#endif
+# endif
/* write a utmp entry with the system's help (pututline() and pals) */
-#ifdef UTMP_USE_LIBRARY
+# ifdef UTMP_USE_LIBRARY
static int
utmp_write_library(struct logininfo *li, struct utmp *ut)
{
setutent();
pututline(ut);
-
-#ifdef HAVE_ENDUTENT
+# ifdef HAVE_ENDUTENT
endutent();
-#endif
- return 1;
+# endif
+ return (1);
}
+# else /* UTMP_USE_LIBRARY */
-#else
-
-/* write a utmp entry direct to the file */
-/* This is a slightly modification of code in OpenBSD's login.c */
+/*
+ * Write a utmp entry direct to the file
+ * This is a slightly modification of code in OpenBSD's login.c
+ */
static int
utmp_write_direct(struct logininfo *li, struct utmp *ut)
{
int tty;
/* FIXME: (ATL) ttyslot() needs local implementation */
+
+#if defined(HAVE_GETTTYENT)
+ struct ttyent *ty;
+
+ tty=0;
+ setttyent();
+ while (NULL != (ty = getttyent())) {
+ tty++;
+ if (!strncmp(ty->ty_name, ut->ut_line, sizeof(ut->ut_line)))
+ break;
+ }
+ endttyent();
+
+ if (NULL == ty) {
+ logit("%s: tty not found", __func__);
+ return (0);
+ }
+#else /* FIXME */
+
tty = ttyslot(); /* seems only to work for /dev/ttyp? style names */
+#endif /* HAVE_GETTTYENT */
+
if (tty > 0 && (fd = open(UTMP_FILE, O_RDWR|O_CREAT, 0644)) >= 0) {
- (void)lseek(fd, (off_t)(tty * sizeof(struct utmp)), SEEK_SET);
+ off_t pos, ret;
+
+ pos = (off_t)tty * sizeof(struct utmp);
+ if ((ret = lseek(fd, pos, SEEK_SET)) == -1) {
+ logit("%s: lseek: %s", __func__, strerror(errno));
+ return (0);
+ }
+ if (ret != pos) {
+ logit("%s: Couldn't seek to tty %d slot in %s",
+ __func__, tty, UTMP_FILE);
+ return (0);
+ }
/*
* Prevent luser from zero'ing out ut_host.
* If the new ut_line is empty but the old one is not
* and ut_line and ut_name match, preserve the old ut_line.
*/
- if ( read(fd, &old_ut, sizeof(struct utmp)) == sizeof(struct utmp)
- && ut->ut_host[0] == '\0'
- && old_ut.ut_host[0] != '\0'
- && strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0
- && strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0 )
- (void)memcpy(ut->ut_host, old_ut.ut_host, sizeof(ut->ut_host));
-
- (void)lseek(fd, (off_t)(tty * sizeof(struct utmp)), SEEK_SET);
- if (write(fd, ut, sizeof(struct utmp))==-1)
- log("utmp_write_direct: error writing %s: %s",
+ if (atomicio(read, fd, &old_ut, sizeof(old_ut)) == sizeof(old_ut) &&
+ (ut->ut_host[0] == '\0') && (old_ut.ut_host[0] != '\0') &&
+ (strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0) &&
+ (strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0))
+ memcpy(ut->ut_host, old_ut.ut_host, sizeof(ut->ut_host));
+
+ if ((ret = lseek(fd, pos, SEEK_SET)) == -1) {
+ logit("%s: lseek: %s", __func__, strerror(errno));
+ return (0);
+ }
+ if (ret != pos) {
+ logit("%s: Couldn't seek to tty %d slot in %s",
+ __func__, tty, UTMP_FILE);
+ return (0);
+ }
+ if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) {
+ logit("%s: error writing %s: %s", __func__,
UTMP_FILE, strerror(errno));
-
- (void)close(fd);
- return 1;
- } else
- return 0;
-}
-#endif /* UTMP_USE_LIBRARY */
+ }
+ close(fd);
+ return (1);
+ } else {
+ return (0);
+ }
+}
+# endif /* UTMP_USE_LIBRARY */
static int
utmp_perform_login(struct logininfo *li)
struct utmp ut;
construct_utmp(li, &ut);
-#ifdef UTMP_USE_LIBRARY
+# ifdef UTMP_USE_LIBRARY
if (!utmp_write_library(li, &ut)) {
- log("utmp_perform_login: utmp_write_library() failed");
- return 0;
+ logit("%s: utmp_write_library() failed", __func__);
+ return (0);
}
-#else
+# else
if (!utmp_write_direct(li, &ut)) {
- log("utmp_perform_login: utmp_write_direct() failed");
- return 0;
+ logit("%s: utmp_write_direct() failed", __func__);
+ return (0);
}
-#endif
- return 1;
+# endif
+ return (1);
}
struct utmp ut;
construct_utmp(li, &ut);
-#ifdef UTMP_USE_LIBRARY
+# ifdef UTMP_USE_LIBRARY
if (!utmp_write_library(li, &ut)) {
- log("utmp_perform_logout: utmp_write_library() failed");
- return 0;
+ logit("%s: utmp_write_library() failed", __func__);
+ return (0);
}
-#else
+# else
if (!utmp_write_direct(li, &ut)) {
- log("utmp_perform_logout: utmp_write_direct() failed");
- return 0;
+ logit("%s: utmp_write_direct() failed", __func__);
+ return (0);
}
-#endif
- return 1;
+# endif
+ return (1);
}
{
switch(li->type) {
case LTYPE_LOGIN:
- return utmp_perform_login(li);
+ return (utmp_perform_login(li));
case LTYPE_LOGOUT:
- return utmp_perform_logout(li);
+ return (utmp_perform_logout(li));
default:
- log("utmp_write_entry: invalid type field");
- return 0;
+ logit("%s: invalid type field", __func__);
+ return (0);
}
}
-
-
-#endif
-/* USE_UTMP */
+#endif /* USE_UTMP */
/**
#ifdef USE_UTMPX
/* if we have the wherewithall, use pututxline etc. */
-#if !defined(DISABLE_PUTUTXLINE) && defined(HAVE_SETUTXENT) \
- && defined(HAVE_PUTUTXLINE)
+# if !defined(DISABLE_PUTUTXLINE) && defined(HAVE_SETUTXENT) && \
+ defined(HAVE_PUTUTXLINE)
# define UTMPX_USE_LIBRARY
-#endif
+# endif
/* write a utmpx entry with the system's help (pututxline() and pals) */
-#ifdef UTMPX_USE_LIBRARY
+# ifdef UTMPX_USE_LIBRARY
static int
utmpx_write_library(struct logininfo *li, struct utmpx *utx)
{
setutxent();
pututxline(utx);
-#ifdef HAVE_ENDUTXENT
+# ifdef HAVE_ENDUTXENT
endutxent();
-#endif
- return 1;
+# endif
+ return (1);
}
-#else
-/* UTMPX_USE_LIBRARY */
-
+# else /* UTMPX_USE_LIBRARY */
/* write a utmp entry direct to the file */
static int
utmpx_write_direct(struct logininfo *li, struct utmpx *utx)
-{
- log("utmpx_write_direct: not implemented!");
- return 0;
+{
+ logit("%s: not implemented!", __func__);
+ return (0);
}
-
-#endif
-/* UTMPX_USE_LIBRARY */
+# endif /* UTMPX_USE_LIBRARY */
static int
utmpx_perform_login(struct logininfo *li)
struct utmpx utx;
construct_utmpx(li, &utx);
-#ifdef UTMPX_USE_LIBRARY
+# ifdef UTMPX_USE_LIBRARY
if (!utmpx_write_library(li, &utx)) {
- log("utmpx_perform_login: utmp_write_library() failed");
- return 0;
+ logit("%s: utmp_write_library() failed", __func__);
+ return (0);
}
-#else
+# else
if (!utmpx_write_direct(li, &ut)) {
- log("utmpx_perform_login: utmp_write_direct() failed");
- return 0;
+ logit("%s: utmp_write_direct() failed", __func__);
+ return (0);
}
-#endif
- return 1;
+# endif
+ return (1);
}
{
struct utmpx utx;
- memset(&utx, '\0', sizeof(utx));
- set_utmpx_time(li, &utx);
- line_stripname(utx.ut_line, li->line, sizeof(utx.ut_line));
-#ifdef HAVE_ID_IN_UTMPX
+ construct_utmpx(li, &utx);
+# ifdef HAVE_ID_IN_UTMPX
line_abbrevname(utx.ut_id, li->line, sizeof(utx.ut_id));
-#endif
-#ifdef HAVE_TYPE_IN_UTMPX
+# endif
+# ifdef HAVE_TYPE_IN_UTMPX
utx.ut_type = DEAD_PROCESS;
-#endif
+# endif
-#ifdef UTMPX_USE_LIBRARY
+# ifdef UTMPX_USE_LIBRARY
utmpx_write_library(li, &utx);
-#else
+# else
utmpx_write_direct(li, &utx);
-#endif
- return 1;
+# endif
+ return (1);
}
-
int
utmpx_write_entry(struct logininfo *li)
{
switch(li->type) {
case LTYPE_LOGIN:
- return utmpx_perform_login(li);
+ return (utmpx_perform_login(li));
case LTYPE_LOGOUT:
- return utmpx_perform_logout(li);
+ return (utmpx_perform_logout(li));
default:
- log("utmpx_write_entry: invalid type field");
- return 0;
+ logit("%s: invalid type field", __func__);
+ return (0);
}
}
-
-
-#endif
-/* USE_UTMPX */
+#endif /* USE_UTMPX */
/**
** Low-level wtmp functions
**/
-#ifdef USE_WTMP
+#ifdef USE_WTMP
-/* write a wtmp entry direct to the end of the file */
-/* This is a slight modification of code in OpenBSD's logwtmp.c */
+/*
+ * Write a wtmp entry direct to the end of the file
+ * This is a slight modification of code in OpenBSD's logwtmp.c
+ */
static int
wtmp_write(struct logininfo *li, struct utmp *ut)
{
int fd, ret = 1;
if ((fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) {
- log("wtmp_write: problem writing %s: %s",
+ logit("%s: problem writing %s: %s", __func__,
WTMP_FILE, strerror(errno));
- return 0;
+ return (0);
}
- if (fstat(fd, &buf) == 0)
- if (write(fd, (char *)ut, sizeof(struct utmp)) !=
- sizeof(struct utmp)) {
+ if (fstat(fd, &buf) == 0)
+ if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) {
ftruncate(fd, buf.st_size);
- log("wtmp_write: problem writing %s: %s",
+ logit("%s: problem writing %s: %s", __func__,
WTMP_FILE, strerror(errno));
ret = 0;
}
- (void)close(fd);
- return ret;
+ close(fd);
+ return (ret);
}
-
static int
-wtmp_perform_login(struct logininfo *li){
+wtmp_perform_login(struct logininfo *li)
+{
struct utmp ut;
construct_utmp(li, &ut);
- return wtmp_write(li, &ut);
+ return (wtmp_write(li, &ut));
}
struct utmp ut;
construct_utmp(li, &ut);
- return wtmp_write(li, &ut);
+ return (wtmp_write(li, &ut));
}
{
switch(li->type) {
case LTYPE_LOGIN:
- return wtmp_perform_login(li);
+ return (wtmp_perform_login(li));
case LTYPE_LOGOUT:
- return wtmp_perform_logout(li);
+ return (wtmp_perform_logout(li));
default:
- log("wtmp_write_entry: invalid type field");
- return 0;
+ logit("%s: invalid type field", __func__);
+ return (0);
}
}
-/* Notes on fetching login data from wtmp/wtmpx
- *
+/*
+ * Notes on fetching login data from wtmp/wtmpx
+ *
* Logouts are usually recorded with (amongst other things) a blank
* username on a given tty line. However, some systems (HP-UX is one)
* leave all fields set, but change the ut_type field to DEAD_PROCESS.
* place and not have ut_type.
*/
-
/* return true if this wtmp entry indicates a login */
static int
wtmp_islogin(struct logininfo *li, struct utmp *ut)
{
- if ( strncmp(li->username, ut->ut_user,
- MIN_SIZEOF(li->username, ut->ut_user)) == 0 ) {
-#ifdef HAVE_TYPE_IN_UTMP
+ if (strncmp(li->username, ut->ut_name,
+ MIN_SIZEOF(li->username, ut->ut_name)) == 0) {
+# ifdef HAVE_TYPE_IN_UTMP
if (ut->ut_type & USER_PROCESS)
- return 1;
-#else
- return 1;
-#endif
+ return (1);
+# else
+ return (1);
+# endif
}
- return 0;
+ return (0);
}
-
int
wtmp_get_entry(struct logininfo *li)
{
struct stat st;
struct utmp ut;
- int fd, found=0;
+ int fd, found = 0;
/* Clear the time entries in our logininfo */
li->tv_sec = li->tv_usec = 0;
if ((fd = open(WTMP_FILE, O_RDONLY)) < 0) {
- log("wtmp_get_entry: problem opening %s: %s",
+ logit("%s: problem opening %s: %s", __func__,
WTMP_FILE, strerror(errno));
- return 0;
+ return (0);
}
- if (fstat(fd, &st) != 0) {
- log("wtmp_get_entry: couldn't stat %s: %s",
+ if (fstat(fd, &st) != 0) {
+ logit("%s: couldn't stat %s: %s", __func__,
WTMP_FILE, strerror(errno));
close(fd);
- return 0;
+ return (0);
}
/* Seek to the start of the last struct utmp */
- if (lseek(fd, (off_t)(0-sizeof(struct utmp)), SEEK_END) == -1) {
+ if (lseek(fd, -(off_t)sizeof(struct utmp), SEEK_END) == -1) {
/* Looks like we've got a fresh wtmp file */
close(fd);
- return 0;
+ return (0);
}
while (!found) {
- if (read(fd, &ut, sizeof(ut)) != sizeof(ut)) {
- log("wtmp_get_entry: read of %s failed: %s",
+ if (atomicio(read, fd, &ut, sizeof(ut)) != sizeof(ut)) {
+ logit("%s: read of %s failed: %s", __func__,
WTMP_FILE, strerror(errno));
close (fd);
- return 0;
+ return (0);
}
if ( wtmp_islogin(li, &ut) ) {
found = 1;
- /* We've already checked for a time in struct
- * utmp, in login_getlast(). */
-#ifdef HAVE_TIME_IN_UTMP
+ /*
+ * We've already checked for a time in struct
+ * utmp, in login_getlast()
+ */
+# ifdef HAVE_TIME_IN_UTMP
li->tv_sec = ut.ut_time;
-#else
+# else
# if HAVE_TV_IN_UTMP
li->tv_sec = ut.ut_tv.tv_sec;
# endif
-#endif
+# endif
line_fullname(li->line, ut.ut_line,
- MIN_SIZEOF(li->line, ut.ut_line));
-#ifdef HAVE_HOST_IN_UTMP
+ MIN_SIZEOF(li->line, ut.ut_line));
+# ifdef HAVE_HOST_IN_UTMP
strlcpy(li->hostname, ut.ut_host,
- MIN_SIZEOF(li->hostname, ut.ut_host));
-#endif
+ MIN_SIZEOF(li->hostname, ut.ut_host));
+# endif
continue;
}
/* Seek back 2 x struct utmp */
- if (lseek(fd, (off_t)(0-2*sizeof(struct utmp)), SEEK_CUR) == -1) {
+ if (lseek(fd, -(off_t)(2 * sizeof(struct utmp)), SEEK_CUR) == -1) {
/* We've found the start of the file, so quit */
- close (fd);
- return 0;
+ close(fd);
+ return (0);
}
}
/* We found an entry. Tidy up and return */
close(fd);
- return 1;
+ return (1);
}
-
-
-#endif
-/* USE_WTMP */
+# endif /* USE_WTMP */
/**
**/
#ifdef USE_WTMPX
-
-/* write a wtmpx entry direct to the end of the file */
-/* This is a slight modification of code in OpenBSD's logwtmp.c */
+/*
+ * Write a wtmpx entry direct to the end of the file
+ * This is a slight modification of code in OpenBSD's logwtmp.c
+ */
static int
wtmpx_write(struct logininfo *li, struct utmpx *utx)
{
+#ifndef HAVE_UPDWTMPX
struct stat buf;
int fd, ret = 1;
if ((fd = open(WTMPX_FILE, O_WRONLY|O_APPEND, 0)) < 0) {
- log("wtmpx_write: problem opening %s: %s",
+ logit("%s: problem opening %s: %s", __func__,
WTMPX_FILE, strerror(errno));
- return 0;
+ return (0);
}
- if (fstat(fd, &buf) == 0)
- if (write(fd, (char *)utx, sizeof(struct utmpx)) !=
- sizeof(struct utmpx)) {
+ if (fstat(fd, &buf) == 0)
+ if (atomicio(vwrite, fd, utx, sizeof(*utx)) != sizeof(*utx)) {
ftruncate(fd, buf.st_size);
- log("wtmpx_write: problem writing %s: %s",
+ logit("%s: problem writing %s: %s", __func__,
WTMPX_FILE, strerror(errno));
ret = 0;
}
- (void)close(fd);
+ close(fd);
- return ret;
+ return (ret);
+#else
+ updwtmpx(WTMPX_FILE, utx);
+ return (1);
+#endif
}
struct utmpx utx;
construct_utmpx(li, &utx);
- return wtmpx_write(li, &utx);
+ return (wtmpx_write(li, &utx));
}
struct utmpx utx;
construct_utmpx(li, &utx);
- return wtmpx_write(li, &utx);
+ return (wtmpx_write(li, &utx));
}
{
switch(li->type) {
case LTYPE_LOGIN:
- return wtmpx_perform_login(li);
+ return (wtmpx_perform_login(li));
case LTYPE_LOGOUT:
- return wtmpx_perform_logout(li);
+ return (wtmpx_perform_logout(li));
default:
- log("wtmpx_write_entry: invalid type field");
- return 0;
+ logit("%s: invalid type field", __func__);
+ return (0);
}
}
static int
wtmpx_islogin(struct logininfo *li, struct utmpx *utx)
{
- if ( strncmp(li->username, utx->ut_user,
- MIN_SIZEOF(li->username, utx->us_user)) == 0 ) {
-#ifdef HAVE_TYPE_IN_UTMPX
+ if (strncmp(li->username, utx->ut_user,
+ MIN_SIZEOF(li->username, utx->ut_user)) == 0 ) {
+# ifdef HAVE_TYPE_IN_UTMPX
if (utx->ut_type == USER_PROCESS)
- return 1;
-#else
- return 1;
-#endif
+ return (1);
+# else
+ return (1);
+# endif
}
- return 0;
+ return (0);
}
li->tv_sec = li->tv_usec = 0;
if ((fd = open(WTMPX_FILE, O_RDONLY)) < 0) {
- log("wtmpx_get_entry: problem opening %s: %s",
+ logit("%s: problem opening %s: %s", __func__,
WTMPX_FILE, strerror(errno));
- return 0;
+ return (0);
}
- if (fstat(fd, &st) != 0) {
- log("wtmpx_get_entry: couldn't stat %s: %s",
- WTMP_FILE, strerror(errno));
+ if (fstat(fd, &st) != 0) {
+ logit("%s: couldn't stat %s: %s", __func__,
+ WTMPX_FILE, strerror(errno));
close(fd);
- return 0;
+ return (0);
}
-
+
/* Seek to the start of the last struct utmpx */
- if (lseek(fd, (off_t)(0-sizeof(struct utmpx)), SEEK_END) == -1 ) {
+ if (lseek(fd, -(off_t)sizeof(struct utmpx), SEEK_END) == -1 ) {
/* probably a newly rotated wtmpx file */
close(fd);
- return 0;
+ return (0);
}
while (!found) {
- if (read(fd, &utx, sizeof(utx)) != sizeof(utx)) {
- log("wtmpx_get_entry: read of %s failed: %s",
+ if (atomicio(read, fd, &utx, sizeof(utx)) != sizeof(utx)) {
+ logit("%s: read of %s failed: %s", __func__,
WTMPX_FILE, strerror(errno));
close (fd);
- return 0;
+ return (0);
}
- /* Logouts are recorded as a blank username on a particular line.
- * So, we just need to find the username in struct utmpx */
- if ( wtmpx_islogin(li, &utx) ) {
-#ifdef HAVE_TV_IN_UTMPX
+ /*
+ * Logouts are recorded as a blank username on a particular
+ * line. So, we just need to find the username in struct utmpx
+ */
+ if (wtmpx_islogin(li, &utx)) {
+ found = 1;
+# if defined(HAVE_TV_IN_UTMPX)
li->tv_sec = utx.ut_tv.tv_sec;
-#else
-# ifdef HAVE_TIME_IN_UTMPX
+# elif defined(HAVE_TIME_IN_UTMPX)
li->tv_sec = utx.ut_time;
-# endif
-#endif
+# endif
line_fullname(li->line, utx.ut_line, sizeof(li->line));
-#ifdef HAVE_HOST_IN_UTMPX
+# if defined(HAVE_HOST_IN_UTMPX)
strlcpy(li->hostname, utx.ut_host,
- MIN_SIZEOF(li->hostname, utx.ut_host));
-#endif
+ MIN_SIZEOF(li->hostname, utx.ut_host));
+# endif
continue;
}
- if (lseek(fd, (off_t)(0-2*sizeof(struct utmpx)), SEEK_CUR) == -1) {
- close (fd);
- return 0;
+ if (lseek(fd, -(off_t)(2 * sizeof(struct utmpx)), SEEK_CUR) == -1) {
+ close(fd);
+ return (0);
}
}
close(fd);
- return 1;
+ return (1);
}
-
-
#endif /* USE_WTMPX */
-
/**
** Low-level libutil login() functions
**/
#ifdef USE_LOGIN
-
static int
syslogin_perform_login(struct logininfo *li)
{
struct utmp *ut;
- if (! (ut = (struct utmp *)malloc(sizeof(struct utmp)))) {
- log("syslogin_perform_login: couldn't malloc()");
- return 0;
- }
+ ut = xmalloc(sizeof(*ut));
construct_utmp(li, ut);
login(ut);
+ free(ut);
- return 1;
+ return (1);
}
-
static int
syslogin_perform_logout(struct logininfo *li)
{
-#ifdef HAVE_LOGOUT
- char line[8];
-
+# ifdef HAVE_LOGOUT
+ char line[UT_LINESIZE];
+
(void)line_stripname(line, li->line, sizeof(line));
- if (!logout(line)) {
- log("syslogin_perform_logout: logout() returned an error");
-# ifdef HAVE_LOGWTMP
- } else {
+ if (!logout(line))
+ logit("%s: logout() returned an error", __func__);
+# ifdef HAVE_LOGWTMP
+ else
logwtmp(line, "", "");
- }
-# endif
+# endif
/* FIXME: (ATL - if the need arises) What to do if we have
* login, but no logout? what if logout but no logwtmp? All
* routines are in libutil so they should all be there,
* but... */
-#endif
- return 1;
+# endif
+ return (1);
}
-
int
syslogin_write_entry(struct logininfo *li)
{
switch (li->type) {
case LTYPE_LOGIN:
- return syslogin_perform_login(li);
+ return (syslogin_perform_login(li));
case LTYPE_LOGOUT:
- return syslogin_perform_logout(li);
+ return (syslogin_perform_logout(li));
default:
- log("syslogin_write_entry: Invalid type field");
- return 0;
+ logit("%s: Invalid type field", __func__);
+ return (0);
}
}
-
-
#endif /* USE_LOGIN */
/* end of file log-syslogin.c */
-
/**
** Low-level lastlog functions
**/
#ifdef USE_LASTLOG
-static void
-lastlog_construct(struct logininfo *li, struct lastlog *last)
-{
- /* clear the structure */
- memset(last, '\0', sizeof(struct lastlog));
-
- (void)line_stripname(last->ll_line, li->line,
- sizeof(last->ll_line));
- strlcpy(last->ll_host, li->hostname,
- MIN_SIZEOF(last->ll_host, li->hostname));
- last->ll_time = li->tv_sec;
-}
-
-
-#define LL_FILE 1
-#define LL_DIR 2
-#define LL_OTHER 3
-
-static int
-lastlog_filetype(char *filename)
-{
- struct stat st;
-
- if ( stat(LASTLOG_FILE, &st) != 0) {
- log("lastlog_perform_login: Couldn't stat %s: %s",
- LASTLOG_FILE, strerror(errno));
- return 0;
- }
- if (S_ISDIR(st.st_mode))
- return LL_DIR;
- else if (S_ISREG(st.st_mode))
- return LL_FILE;
- else
- return LL_OTHER;
-}
-
-
+#if !defined(LASTLOG_WRITE_PUTUTXLINE) || !defined(HAVE_GETLASTLOGXBYNAME)
/* open the file (using filemode) and seek to the login entry */
static int
lastlog_openseek(struct logininfo *li, int *fd, int filemode)
{
off_t offset;
- int type;
char lastlog_file[1024];
+ struct stat st;
- type = lastlog_filetype(LASTLOG_FILE);
- switch (type) {
- case LL_FILE:
- strlcpy(lastlog_file, LASTLOG_FILE, sizeof(lastlog_file));
- break;
- case LL_DIR:
+ if (stat(LASTLOG_FILE, &st) != 0) {
+ logit("%s: Couldn't stat %s: %s", __func__,
+ LASTLOG_FILE, strerror(errno));
+ return (0);
+ }
+ if (S_ISDIR(st.st_mode)) {
snprintf(lastlog_file, sizeof(lastlog_file), "%s/%s",
- LASTLOG_FILE, li->username);
- break;
- default:
- log("lastlog_openseek: %.100s is not a file or directory!",
+ LASTLOG_FILE, li->username);
+ } else if (S_ISREG(st.st_mode)) {
+ strlcpy(lastlog_file, LASTLOG_FILE, sizeof(lastlog_file));
+ } else {
+ logit("%s: %.100s is not a file or directory!", __func__,
LASTLOG_FILE);
- return 0;
- } /* switch */
-
- *fd = open(lastlog_file, filemode);
- if ( *fd < 0) {
- log("lastlog_openseek: Couldn't open %s: %s",
- lastlog_file, strerror(errno));
- return 0;
+ return (0);
}
- /* find this uid's offset in the lastlog file */
- offset = (off_t) ( (long)li->uid * sizeof(struct lastlog));
- if ( lseek(*fd, offset, SEEK_SET) != offset ) {
- log("lastlog_openseek: %s->lseek(): %s",
+ *fd = open(lastlog_file, filemode, 0600);
+ if (*fd < 0) {
+ debug("%s: Couldn't open %s: %s", __func__,
lastlog_file, strerror(errno));
- return 0;
+ return (0);
}
- return 1;
-}
-static int
-lastlog_perform_login(struct logininfo *li)
-{
- struct lastlog last;
- int fd;
-
- /* create our struct lastlog */
- lastlog_construct(li, &last);
+ if (S_ISREG(st.st_mode)) {
+ /* find this uid's offset in the lastlog file */
+ offset = (off_t) ((long)li->uid * sizeof(struct lastlog));
- /* write the entry */
- if (lastlog_openseek(li, &fd, O_RDWR)) {
- if ( write(fd, &last, sizeof(struct lastlog))
- != sizeof(struct lastlog) ) {
- log("lastlog_write_filemode: Error writing to %s: %s",
- LASTLOG_FILE, strerror(errno));
- return 0;
+ if (lseek(*fd, offset, SEEK_SET) != offset) {
+ logit("%s: %s->lseek(): %s", __func__,
+ lastlog_file, strerror(errno));
+ return (0);
}
- return 1;
- } else
- return 0;
-}
+ }
+ return (1);
+}
+#endif /* !LASTLOG_WRITE_PUTUTXLINE || !HAVE_GETLASTLOGXBYNAME */
+#ifdef LASTLOG_WRITE_PUTUTXLINE
int
lastlog_write_entry(struct logininfo *li)
{
switch(li->type) {
case LTYPE_LOGIN:
- return lastlog_perform_login(li);
+ return 1; /* lastlog written by pututxline */
default:
- log("lastlog_write_entry: Invalid type field");
+ logit("lastlog_write_entry: Invalid type field");
return 0;
}
}
-
-
-static void
-lastlog_populate_entry(struct logininfo *li, struct lastlog *last)
+#else /* LASTLOG_WRITE_PUTUTXLINE */
+int
+lastlog_write_entry(struct logininfo *li)
{
- line_fullname(li->line, last->ll_line, sizeof(li->line));
- strlcpy(li->hostname, last->ll_host,
- MIN_SIZEOF(li->hostname, last->ll_host));
- li->tv_sec = last->ll_time;
+ struct lastlog last;
+ int fd;
+
+ switch(li->type) {
+ case LTYPE_LOGIN:
+ /* create our struct lastlog */
+ memset(&last, '\0', sizeof(last));
+ line_stripname(last.ll_line, li->line, sizeof(last.ll_line));
+ strlcpy(last.ll_host, li->hostname,
+ MIN_SIZEOF(last.ll_host, li->hostname));
+ last.ll_time = li->tv_sec;
+
+ if (!lastlog_openseek(li, &fd, O_RDWR|O_CREAT))
+ return (0);
+
+ /* write the entry */
+ if (atomicio(vwrite, fd, &last, sizeof(last)) != sizeof(last)) {
+ close(fd);
+ logit("%s: Error writing to %s: %s", __func__,
+ LASTLOG_FILE, strerror(errno));
+ return (0);
+ }
+
+ close(fd);
+ return (1);
+ default:
+ logit("%s: Invalid type field", __func__);
+ return (0);
+ }
}
+#endif /* LASTLOG_WRITE_PUTUTXLINE */
+#ifdef HAVE_GETLASTLOGXBYNAME
+int
+lastlog_get_entry(struct logininfo *li)
+{
+ struct lastlogx l, *ll;
+ if ((ll = getlastlogxbyname(li->username, &l)) == NULL) {
+ memset(&l, '\0', sizeof(l));
+ ll = &l;
+ }
+ line_fullname(li->line, ll->ll_line, sizeof(li->line));
+ strlcpy(li->hostname, ll->ll_host,
+ MIN_SIZEOF(li->hostname, ll->ll_host));
+ li->tv_sec = ll->ll_tv.tv_sec;
+ li->tv_usec = ll->ll_tv.tv_usec;
+ return (1);
+}
+#else /* HAVE_GETLASTLOGXBYNAME */
int
lastlog_get_entry(struct logininfo *li)
{
struct lastlog last;
+ int fd, ret;
+
+ if (!lastlog_openseek(li, &fd, O_RDONLY))
+ return (0);
+
+ ret = atomicio(read, fd, &last, sizeof(last));
+ close(fd);
+
+ switch (ret) {
+ case 0:
+ memset(&last, '\0', sizeof(last));
+ /* FALLTHRU */
+ case sizeof(last):
+ line_fullname(li->line, last.ll_line, sizeof(li->line));
+ strlcpy(li->hostname, last.ll_host,
+ MIN_SIZEOF(li->hostname, last.ll_host));
+ li->tv_sec = last.ll_time;
+ return (1);
+ case -1:
+ error("%s: Error reading from %s: %s", __func__,
+ LASTLOG_FILE, strerror(errno));
+ return (0);
+ default:
+ error("%s: Error reading from %s: Expecting %d, got %d",
+ __func__, LASTLOG_FILE, (int)sizeof(last), ret);
+ return (0);
+ }
+
+ /* NOTREACHED */
+ return (0);
+}
+#endif /* HAVE_GETLASTLOGXBYNAME */
+#endif /* USE_LASTLOG */
+
+#ifdef USE_BTMP
+ /*
+ * Logs failed login attempts in _PATH_BTMP if that exists.
+ * The most common login failure is to give password instead of username.
+ * So the _PATH_BTMP file checked for the correct permission, so that
+ * only root can read it.
+ */
+
+void
+record_failed_login(const char *username, const char *hostname,
+ const char *ttyn)
+{
int fd;
+ struct utmp ut;
+ struct sockaddr_storage from;
+ socklen_t fromlen = sizeof(from);
+ struct sockaddr_in *a4;
+ struct sockaddr_in6 *a6;
+ time_t t;
+ struct stat fst;
+
+ if (geteuid() != 0)
+ return;
+ if ((fd = open(_PATH_BTMP, O_WRONLY | O_APPEND)) < 0) {
+ debug("Unable to open the btmp file %s: %s", _PATH_BTMP,
+ strerror(errno));
+ return;
+ }
+ if (fstat(fd, &fst) < 0) {
+ logit("%s: fstat of %s failed: %s", __func__, _PATH_BTMP,
+ strerror(errno));
+ goto out;
+ }
+ if((fst.st_mode & (S_IRWXG | S_IRWXO)) || (fst.st_uid != 0)){
+ logit("Excess permission or bad ownership on file %s",
+ _PATH_BTMP);
+ goto out;
+ }
- if (lastlog_openseek(li, &fd, O_RDONLY)) {
- if ( read(fd, &last, sizeof(struct lastlog))
- != sizeof(struct lastlog) ) {
- log("lastlog_write_filemode: Error reading from %s: %s",
- LASTLOG_FILE, strerror(errno));
- return 0;
- } else {
- lastlog_populate_entry(li, &last);
- return 1;
+ memset(&ut, 0, sizeof(ut));
+ /* strncpy because we don't necessarily want nul termination */
+ strncpy(ut.ut_user, username, sizeof(ut.ut_user));
+ strlcpy(ut.ut_line, "ssh:notty", sizeof(ut.ut_line));
+
+ time(&t);
+ ut.ut_time = t; /* ut_time is not always a time_t */
+ ut.ut_type = LOGIN_PROCESS;
+ ut.ut_pid = getpid();
+
+ /* strncpy because we don't necessarily want nul termination */
+ strncpy(ut.ut_host, hostname, sizeof(ut.ut_host));
+
+ if (packet_connection_is_on_socket() &&
+ getpeername(packet_get_connection_in(),
+ (struct sockaddr *)&from, &fromlen) == 0) {
+ ipv64_normalise_mapped(&from, &fromlen);
+ if (from.ss_family == AF_INET) {
+ a4 = (struct sockaddr_in *)&from;
+ memcpy(&ut.ut_addr, &(a4->sin_addr),
+ MIN_SIZEOF(ut.ut_addr, a4->sin_addr));
}
- } else
- return 0;
-}
+#ifdef HAVE_ADDR_V6_IN_UTMP
+ if (from.ss_family == AF_INET6) {
+ a6 = (struct sockaddr_in6 *)&from;
+ memcpy(&ut.ut_addr_v6, &(a6->sin6_addr),
+ MIN_SIZEOF(ut.ut_addr_v6, a6->sin6_addr));
+ }
+#endif
+ }
+ if (atomicio(vwrite, fd, &ut, sizeof(ut)) != sizeof(ut))
+ error("Failed to write to %s: %s", _PATH_BTMP,
+ strerror(errno));
-#endif /* USE_LASTLOG */
+out:
+ close(fd);
+}
+#endif /* USE_BTMP */
andersk / openssh.git / blobdiff