1 files changed, 22 insertions, 0 deletions
diff --git a/src/s6-linux-utils/s6-freeramdisk.c b/src/s6-linux-utils/s6-freeramdisk.c
new file mode 100644
index 0000000..b965527
--- /dev/null
+++ b/src/s6-linux-utils/s6-freeramdisk.c
@@ -0,0 +1,22 @@
+/* ISC license. */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/mount.h>
+#include <sys/ioctl.h>
+
+#include <skalibs/strerr.h>
+
+#define USAGE "s6-freeramdisk ramdisk_device"
+
+int main (int argc, char const *const *argv)
+{
+  int fd ;
+  PROG = "s6-freeramdisk" ;
+  if (argc < 2) strerr_dieusage(100, USAGE) ;
+  fd = open(argv[1], O_RDWR) ;
+  if (fd < 0) strerr_diefu3sys(111, "open ", argv[1], " in read-write mode") ;
+  if (ioctl(fd, BLKFLSBUF) < 0) strerr_diefu2sys(111, "ioctl ", argv[1]) ;
+  return 0 ;
+}