1 files changed, 14 insertions, 0 deletions

diff --git a/src/firejail/checkcfg.c b/src/firejail/checkcfg.c
index df0e1a8e1..430b0c5a6 100644
--- a/src/firejail/checkcfg.c
+++ b/src/firejail/checkcfg.c
@@ -24,6 +24,7 @@
 
 static int initialized = 0;
 static int cfg_val[CFG_MAX];
+char *xephyr_screen = "800x600";
 
 int checkcfg(int val) {
         EUID_ASSERT();
@@ -132,8 +133,21 @@ int checkcfg(int val) {
                                 else
                                         goto errout;
                         }
+                        
+                        // Xephyr screen size
+                        else if (strncmp(ptr, "xephyr-screen ", 14) == 0) {
+                                // expecting two numbers and an x between them
+                                int n1;
+                                int n2;
+                                int rv = sscanf(ptr + 14, "%dx%d", &n1, &n2);
+                                if (rv != 2)
+                                        goto errout;
+                                if (asprintf(&xephyr_screen, "%dx%d", n1, n2) == -1)
+                                        errExit("asprintf");
+                        }
                         else
                                 goto errout;
+                                
                         free(ptr);
                 }