From f540eddb74580d41359e9d147897b7585cfd7e2d Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel@debian.org>
Date: Sat, 18 Jan 2025 08:11:02 +0100
Subject: [PATCH] Creating /dev/shm if its not existing, otherwise haveged
 fails to start.

Signed-off-by: Daniel Baumann <daniel@debian.org>
---
 src/haveged.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/haveged.c b/src/haveged.c
index c68e510..b9c4827 100644
--- a/src/haveged.c
+++ b/src/haveged.c
@@ -490,6 +490,12 @@ int main(int argc, char **argv)
          }
       }
       /* Initilize named semaphore to synchronize command instances */
+      if (mkdir("/dev/shm", 0755) != 0) {
+        if (errno != EEXIST) {
+          error_exit("Couldn't create /dev/shm directory: %s", strerror(errno));
+        }
+      }
+
       sem = sem_open(SEM_NAME, O_CREAT, 0644, 1);
       if (sem == NULL) {
          fprintf(stderr, "Warning: Couldn't create named semaphore " SEM_NAME" error: %s", strerror(errno));