From b64828b01ae8b26a8083be83a6faed03a26cef85 Mon Sep 17 00:00:00 2001
From: Lorenz Stechauner <lorenz.stechauner@necronda.net>
Date: Mon, 28 Dec 2020 13:48:37 +0100
Subject: [PATCH] Shared mem debug

---
 src/cache.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/cache.c b/src/cache.c
index f3dc6b6..ff86991 100644
--- a/src/cache.c
+++ b/src/cache.c
@@ -35,11 +35,20 @@ int cache_process() {
         fprintf(stderr, ERR_STR "Unable to create shared memory: %s" CLR_STR "\n", strerror(errno));
         return -1;
     }
+
+    struct shmid_ds info;
+    if (shmctl(shm_id, IPC_STAT, &info) < 0) goto shmctl_err;
+    info.shm_perm.mode = 0600;
+    if (shmctl(shm_id, IPC_SET, &info) < 0) {
+        shmctl_err:
+        fprintf(stderr, ERR_STR "Unable to update permissions for shared memory: %s" CLR_STR "\n", strerror(errno));
+        return -3;
+    }
+
     shmdt(cache);
     void *shm_rw = shmat(shm_id, NULL, 0);
     if (shm_rw == (void *) -1) {
         fprintf(stderr, ERR_STR "Unable to attach shared memory (rw): %s" CLR_STR "\n", strerror(errno));
-        shmctl(shm_id, IPC_RMID, NULL);
         return -2;
     }
     cache = shm_rw;