util: use shm_open for in-memory files

shm_open is a POSIX function creating an in-memory file. Using it simplifies
the code and removes the dependency on XDG_RUNTIME_DIR. The only downside is
that we need to generate a random name for the shm file.

1 files changed, 7 insertions, 0 deletions

diff --git a/include/util/shm.h b/include/util/shm.h
new file mode 100644
index 00000000..fb67b711
--- /dev/null
+++ b/include/util/shm.h
@@ -0,0 +1,7 @@
+#ifndef UTIL_SHM_H
+#define UTIL_SHM_H
+
+int create_shm_file(void);
+int allocate_shm_file(size_t size);
+
+#endif