Use incremental id for shared memory file

1 files changed, 9 insertions, 14 deletions

diff --git a/reduced_system_layer.c b/reduced_system_layer.c
index 544628a..29087f3 100644
--- a/reduced_system_layer.c
+++ b/reduced_system_layer.c
@@ -1644,26 +1644,21 @@ typedef struct {
 } WL_Output_;
 
 static i32 anonymous_shm_open(void) {
-  c8  name[]  = "scr_XXXXXX";
-  i32 retries = 100;
-
-  do {
-    --retries;
-
-    struct timespec ts;
-    clock_gettime(CLOCK_REALTIME, &ts);
-    u64 r = ts.tv_nsec;
-    for (int i = 0; i < 6; ++i) {
-      name[sizeof name - 7 + i] = 'A' + (r&15) + (r&16) * 2;
-      r >>= 5;
-    }
+  c8  name[13] = "scr_XXXXXX";
+  i32 retries  = 1000000;
+
+  for (i32 i = 0; i < retries; ++i) {
+    snprintf(name + 4, 7, "%06d", i);
 
     i32 fd = shm_open(name, O_RDWR | O_CREAT | O_EXCL, 0600);
     if (fd >= 0) {
       shm_unlink(name);
       return fd;
     }
-  } while (retries > 0 && errno == EEXIST);
+
+    if (errno != EEXIST)
+      break;
+  }
 
   LOG_ERROR("shm_open failed.\n");
   return -1;