fixed --top

1 files changed, 8 insertions, 6 deletions

diff --git a/src/firejail/sbox.c b/src/firejail/sbox.c
index 3d4eef3aa..bca72c14a 100644
--- a/src/firejail/sbox.c
+++ b/src/firejail/sbox.c
@@ -141,14 +141,16 @@ int sbox_run(unsigned filter, int num, ...) {
                 int max = 20; // getdtablesize() is overkill for a firejail process
                 for (i = 3; i < max; i++)
                         close(i); // close open files
+                if ((filter & SBOX_ALLOW_STDIN) == 0) {
                 int fd = open("/dev/null",O_RDWR, 0);
-                if (fd != -1) {
-                        dup2 (fd, STDIN_FILENO);
-                        if (fd > 2)
-                                close (fd);
+                        if (fd != -1) {
+                                dup2 (fd, STDIN_FILENO);
+                                if (fd > 2)
+                                        close (fd);
+                        }
+                        else // the user could run the sandbox without /dev/null
+                                close(STDIN_FILENO);
                 }
-                else // the user could run the sandbox without /dev/null
-                        close(STDIN_FILENO);
                 umask(027);     
 
                 // apply filters