X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=ipc.c;h=d7f515dfec8788f267a41f8c33264d25b15abf8a;hp=89bbe53564e3c678e97b453e38b7c70be8063314;hb=8aac5dd1bc1520ea8c518e902ecc82bb198d993f;hpb=5ae09eae1f157cbfcbe6f20c50d559cd6ad4c128

diff --git a/ipc.c b/ipc.c
index 89bbe535..d7f515df 100644
--- a/ipc.c
+++ b/ipc.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2006-2013 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2006 Andre Noll <maan@tuebingen.mpg.de>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -161,6 +161,27 @@ int shm_attach(int id, enum shm_attach_mode mode, void **result)
 	return *result == (void *) -1? -ERRNO_TO_PARA_ERROR(errno) : 1;
 }
 
+/**
+ * Get the size of a shared memory segment.
+ *
+ * \param id The shared memory segment identifier.
+ * \param result Size in bytes is returned here, zero on errors.
+ *
+ * \return Standard.
+ *
+ * \sa shmctl(2).
+ */
+int shm_size(int id, size_t *result)
+{
+	struct shmid_ds ds; /* data structure */
+
+	*result = 0;
+	if (shmctl(id, IPC_STAT, &ds) < 0)
+		return -ERRNO_TO_PARA_ERROR(errno);
+	*result = ds.shm_segsz;
+	return 1;
+}
+
 /**
  * Detach a shared memory segment.
  *