Promote fsync.

1 files changed, 33 insertions, 0 deletions

diff --git a/toys/other/fsync.c b/toys/other/fsync.c
new file mode 100644
index 00000000..e6f6c8d9
--- /dev/null
+++ b/toys/other/fsync.c
@@ -0,0 +1,33 @@
+/* fsync.c - Synchronize a file's in-core state with storage device.
+ *
+ * Copyright 2015 Ranjan Kumar <ranjankumar.bth@gmail.comi>
+ *
+ * No Standard.
+
+USE_FSYNC(NEWTOY(fsync, "<1d", TOYFLAG_BIN))
+
+config FSYNC
+  bool "fsync"
+  default y
+  help
+    usage: fsync [-d] [FILE...]
+
+    Synchronize a file's in-core state with storage device.
+
+    -d	Avoid syncing metadata.
+*/
+
+#define FOR_fsync
+#include "toys.h"
+
+static void do_fsync(int fd, char *name)
+{
+  if (((toys.optflags & FLAG_d) ? fdatasync(fd) : fsync(fd)))
+    perror_msg("can't sync '%s'", name);
+}
+
+void fsync_main(void)
+{
+  loopfiles_rw(toys.optargs, O_RDONLY|O_NOATIME|O_NOCTTY|O_CLOEXEC,
+      0, 0, do_fsync);
+}