Fixup getty, login, etc so the utmp and wtmp are updated, allowing

the 'who' and 'last' applets among other things to work as expected.
 -Erik


git-svn-id: svn://busybox.net/trunk/busybox@9047 69ca8d6d-28ef-0310-b511-8ec308f3f277

5 files changed, 23 insertions, 5 deletions

diff --git a/coreutils/Config.in b/coreutils/Config.in
index 5c0180a5e..c995e55ff 100644
--- a/coreutils/Config.in
+++ b/coreutils/Config.in
@@ -538,6 +538,7 @@ config CONFIG_WC
 config CONFIG_WHO
         bool "who"
         default n
+        select CONFIG_FEATURE_U_W_TMP
         help
           who is used to show who is logged on.
 
diff --git a/loginutils/Config.in b/loginutils/Config.in
index db038abb0..d9938b066 100644
--- a/loginutils/Config.in
+++ b/loginutils/Config.in
@@ -57,6 +57,15 @@ config CONFIG_GETTY
         help
           getty lets you log in on a tty, it is normally invoked by init.
 
+config CONFIG_FEATURE_U_W_TMP
+        bool "  Support utmp and wtmp files"
+        depends on CONFIG_GETTY || CONFIG_LOGIN || CONFIG_SU || CONFIG_WHO || CONFIG_LAST
+        default n
+        help
+          The files /var/run/utmp and /var/run/wtmp can be used to track when
+          user's have logged into and logged out of the system, allowing programs
+          such as 'who' and 'last' to list who is currently logged in.
+
 config CONFIG_LOGIN
         bool "login"
         default n
diff --git a/loginutils/getty.c b/loginutils/getty.c
index b211733ee..2b37136fe 100644
--- a/loginutils/getty.c
+++ b/loginutils/getty.c
@@ -228,7 +228,7 @@ static void termio_final(struct options *op, struct termio *tp,
 
                                   struct chardata *cp);
 static int caps_lock(const char *s);
-static int bcode(const char *s);
+static int bcode(char *s);
 static void error(const char *fmt, ...) __attribute__ ((noreturn));
 
 #ifdef CONFIG_FEATURE_U_W_TMP
@@ -503,6 +503,9 @@ static void update_utmp(char *line)
          * utmp file can be opened for update, and if we are able to find our
          * entry in the utmp file.
          */
+        if (access(_PATH_UTMP, R_OK|W_OK) == -1) {
+                creat(_PATH_UTMP, O_RDWR);
+        }
         utmpname(_PATH_UTMP);
         setutent();
         while ((utp = getutent())
@@ -531,6 +534,9 @@ static void update_utmp(char *line)
         endutent();
 
         {
+                if (access(_PATH_WTMP, R_OK|W_OK) == -1) {
+                        creat(_PATH_WTMP, O_RDWR);
+                }
                 updwtmp(_PATH_WTMP, &ut);
         }
 }
@@ -953,7 +959,7 @@ static int caps_lock(const char *s)
 }
 
 /* bcode - convert speed string to speed code; return 0 on failure */
-static int bcode(const char *s)
+static int bcode(char *s)
 {
         int r;
         unsigned long value;
diff --git a/loginutils/login.c b/loginutils/login.c
index 20fab0753..93d81d314 100644
--- a/loginutils/login.c
+++ b/loginutils/login.c
@@ -403,8 +403,6 @@ static void motd ( )
 #ifdef CONFIG_FEATURE_U_W_TMP
 // vv  Taken from tinylogin utmp.c  vv
 
-#define _WTMP_FILE "/var/log/wtmp"
-
 #define NO_UTENT \
         "No utmp entry.  You must exec \"login\" from the lowest level \"sh\""
 #define NO_TTY \
@@ -480,6 +478,9 @@ static void setutmp(const char *name, const char *line)
         setutent();
         pututline(&utent);
         endutent();
-        updwtmp(_WTMP_FILE, &utent);
+        if (access(_PATH_WTMP, R_OK|W_OK) == -1) {
+                creat(_PATH_WTMP, O_RDWR);
+        }
+        updwtmp(_PATH_WTMP, &utent);
 }
 #endif /* CONFIG_FEATURE_U_W_TMP */
diff --git a/miscutils/Config.in b/miscutils/Config.in
index ded26b3a8..3c92c4674 100644
--- a/miscutils/Config.in
+++ b/miscutils/Config.in
@@ -83,6 +83,7 @@ config CONFIG_DEVFSD_VERBOSE
 config CONFIG_LAST
         bool "last"
         default n
+        select CONFIG_FEATURE_U_W_TMP
         help
           'last' displays a list of the last users that logged into the system.