fix chmod and chown of tty device files

Signed-off-by: Mattias Andrée <maandree@operamail.com>

3 files changed, 15 insertions, 2 deletions

diff --git a/src/cerberus.c b/src/cerberus.c
index f20e600..e52a48f 100644
--- a/src/cerberus.c
+++ b/src/cerberus.c
@@ -53,6 +53,8 @@ char* passphrase = NULL;
  */
 int main(int argc, char** argv)
 {
+  char* tty_device = ttyname(STDIN_FILENO);
+  
   do_login(argc, argv);
   
   /* Ignore signals */
@@ -63,6 +65,16 @@ int main(int argc, char** argv)
   while ((wait(NULL) == -1) && (errno == EINTR))
     ;
   
+  /* Regain access to the terminal */
+  if (tty_device)
+    {
+      int fd = open(tty_device, O_RDWR | O_NONBLOCK);
+      if (fd)
+	dup2(fd, 0);
+      dup2(fd, 1);
+      dup2(fd, 2);
+    }
+  
   /* Reset terminal ownership and mode */
   chown_tty(0, tty_group, 0);
   
diff --git a/src/cerberus.h b/src/cerberus.h
index 5851524..69df492 100644
--- a/src/cerberus.h
+++ b/src/cerberus.h
@@ -28,6 +28,7 @@
 #include <errno.h>
 #include <stropts.h>
 #include <termios.h>
+#include <fcntl.h>
 #include <sys/wait.h>
 #include <sys/ioctl.h>
 #include <sys/types.h>
diff --git a/src/security.c b/src/security.c
index 3abd7b4..eb4bd3c 100644
--- a/src/security.c
+++ b/src/security.c
@@ -132,8 +132,8 @@ void chown_tty(uid_t owner, gid_t group, char with_fail)
 	    
 	    vcs -= VCS_LEN;
 	    vcsa -= VCSA_LEN;
-	    strcpy(vcs,  VCS);
-	    strcpy(vcsa, VCSA);
+	    strncpy(vcs,  VCS,  VCS_LEN);
+	    strncpy(vcsa, VCSA, VCSA_LEN);
 	    
 	    #ifdef OWN_VCS
 	      if (chown(vcs, owner, group) && with_fail)  fail("chown");