last_patch60 from vodz:

    login and getty applets writes utmp/wtmp but init do clearing not.
    I think, in current time deny wtmp/utmp writes as undefault features.

2 files changed, 21 insertions, 4 deletions

diff --git a/loginutils/getty.c b/loginutils/getty.c
index 468208a..fec8ae8 100644
--- a/loginutils/getty.c
+++ b/loginutils/getty.c
@@ -37,8 +37,6 @@
 #define USE_SYSLOG
 #endif
 
-extern void updwtmp(const char *filename, const struct utmp *ut);
-
  /* If USE_SYSLOG is undefined all diagnostics go directly to /dev/console. */
 #ifdef	USE_SYSLOG
 #include <syslog.h>
@@ -52,7 +50,10 @@ extern void updwtmp(const char *filename, const struct utmp *ut);
 
 #ifdef LOGIN_PROCESS			/* defined in System V utmp.h */
 #define	SYSV_STYLE				/* select System V style getty */
+#ifdef CONFIG_FEATURE_U_W_TMP
+extern void updwtmp(const char *filename, const struct utmp *ut);
 #endif
+#endif  /* LOGIN_PROCESS */
 
  /*
   * Things you may want to modify.
@@ -218,7 +219,6 @@ static struct Speedtab speedtab[] = {
 
 static void parse_args(int argc, char **argv, struct options *op);
 static void parse_speeds(struct options *op, char *arg);
-static void update_utmp(char *line);
 static void open_tty(char *tty, struct termio *tp, int local);
 static void termio_init(struct termio *tp, int speed, struct options *op);
 static void auto_baud(struct termio *tp);
@@ -234,6 +234,10 @@ static int caps_lock(const char *s);
 static int bcode(const char *s);
 static void error(const char *fmt, ...) __attribute__ ((noreturn));
 
+#ifdef CONFIG_FEATURE_U_W_TMP
+static void update_utmp(char *line);
+#endif
+
 /* The following is used for understandable diagnostics. */
 
 /* Fake hostname for ut_host specified on command line. */
@@ -286,9 +290,12 @@ int getty_main(int argc, char **argv)
 
 	/* Update the utmp file. */
 
+
 #ifdef	SYSV_STYLE
+#ifdef CONFIG_FEATURE_U_W_TMP
 	update_utmp(options.tty);
 #endif
+#endif
 
 	debug("calling open_tty\n");
 	/* Open the tty as standard { input, output, error }. */
@@ -492,6 +499,7 @@ static void parse_speeds(struct options *op, char *arg)
 }
 
 #ifdef	SYSV_STYLE
+#ifdef CONFIG_FEATURE_U_W_TMP
 
 /* update_utmp - update our utmp entry */
 static void update_utmp(char *line)
@@ -544,7 +552,8 @@ static void update_utmp(char *line)
 	}
 }
 
-#endif
+#endif /* CONFIG_FEATURE_U_W_TMP */
+#endif /* SYSV_STYLE */
 
 /* open_tty - set up tty as standard { input, output, error } */
 static void open_tty(char *tty, struct termio *tp, int local)
diff --git a/loginutils/login.c b/loginutils/login.c
index 7687556..714829d 100644
--- a/loginutils/login.c
+++ b/loginutils/login.c
@@ -18,9 +18,11 @@
 #include "busybox.h"
 
 
+#ifdef CONFIG_FEATURE_U_W_TMP
 // import from utmp.c
 static void checkutmp(int picky);
 static void setutmp(const char *name, const char *line);
+#endif
 
 // import from encrypt.c
 extern char *pw_encrypt(const char *clear, const char *salt);
@@ -119,7 +121,9 @@ extern int login_main(int argc, char **argv)
 	if ( !isatty ( 0 ) || !isatty ( 1 ) || !isatty ( 2 )) 
 		return EXIT_FAILURE;		/* Must be a terminal */
 
+#ifdef CONFIG_FEATURE_U_W_TMP
 	checkutmp ( !amroot );
+#endif
 
 	tmp = ttyname ( 0 );
 	if ( tmp && ( strncmp ( tmp, "/dev/", 5 ) == 0 ))
@@ -212,7 +216,9 @@ auth_ok:
 	if ( check_nologin ( pw-> pw_uid == 0 ))
 		return EXIT_FAILURE;
 
+#ifdef CONFIG_FEATURE_U_W_TMP
 	setutmp ( username, tty );
+#endif
 	if ( *tty != '/' ) 
 		snprintf ( full_tty, sizeof( full_tty ) - 1, "/dev/%s", tty);
 	else
@@ -356,6 +362,7 @@ static void motd ( )
 }
 
 
+#ifdef CONFIG_FEATURE_U_W_TMP
 // vv  Taken from tinylogin utmp.c  vv
 
 #define _WTMP_FILE "/var/log/wtmp"
@@ -437,3 +444,4 @@ static void setutmp(const char *name, const char *line)
 	endutent();
 	updwtmp(_WTMP_FILE, &utent);
 }
+#endif /* CONFIG_FEATURE_U_W_TMP */