1 files changed, 70 insertions, 0 deletions
diff --git a/toys/other/blockdev.c b/toys/other/blockdev.c
new file mode 100644
index 00000000..79b4d6f9
--- /dev/null
+++ b/toys/other/blockdev.c
@@ -0,0 +1,70 @@
+/* blockdev.c -show/set blockdev information.
+ *
+ * Copyright 2014 Sameer Prakash Pradhan <sameer.p.pradhan@gmail.com>
+ *
+ * No Standard.
+
+USE_BLOCKDEV(NEWTOY(blockdev, "<1>1(setro)(setrw)(getro)(getss)(getbsz)(setbsz)#<0(getsz)(getsize)(getsize64)(flushbufs)(rereadpt)",TOYFLAG_USR|TOYFLAG_BIN))
+
+config BLOCKDEV
+  bool "blockdev"
+  default y
+  help
+    usage: blockdev --OPTION... BLOCKDEV...
+
+    Call ioctl(s) on each listed block device
+
+    OPTIONs:
+    --setro		Set read only
+    --setrw		Set read write
+    --getro		Get read only
+    --getss		Get sector size
+    --getbsz	Get block size
+    --setbsz	BYTES	Set block size
+    --getsz		Get device size in 512-byte sectors
+    --getsize	Get device size in sectors (deprecated)
+    --getsize64	Get device size in bytes
+    --flushbufs	Flush buffers
+    --rereadpt	Reread partition table
+*/
+
+#define FOR_blockdev
+#include "toys.h"
+#include <linux/fs.h>
+
+GLOBALS(
+  long bsz;
+)
+
+void blockdev_main(void)
+{
+  int cmds[] = {BLKRRPART, BLKFLSBUF, BLKGETSIZE64, BLKGETSIZE, BLKGETSIZE64,
+                BLKBSZSET, BLKBSZGET, BLKSSZGET, BLKROGET, BLKROSET, BLKROSET};
+  char **ss;
+  long long val = 0;
+
+  if (!toys.optflags) {
+    toys.exithelp = 1;
+    error_exit("need --option");
+  }
+
+  for (ss = toys.optargs;  *ss; ss++) {
+    int fd = xopen(*ss, O_RDONLY), i;
+
+    // Command line order discarded so perform multiple operations in flag order
+    for (i = 0; i < 32; i++) {
+      long flag = toys.optflags & (1<<i);
+
+      if (!flag) continue;
+
+      if (flag & FLAG_setbsz) val = TT.bsz;
+      else val = !!(flag & FLAG_setro);
+
+      xioctl(fd, cmds[i], &val);
+
+      flag &= FLAG_setbsz|FLAG_setro|FLAG_flushbufs|FLAG_rereadpt|FLAG_setrw;
+      if (!flag) printf("%lld\n", (toys.optflags & FLAG_getsz) ? val >> 9: val);
+    }
+    xclose(fd);
+  }
+}