+//usage:#define dd_trivial_usage
+//usage: "[if=FILE] [of=FILE] " IF_FEATURE_DD_IBS_OBS("[ibs=N] [obs=N] ") "[bs=N] [count=N] [skip=N]\n"
+//usage: " [seek=N]" IF_FEATURE_DD_IBS_OBS(" [conv=notrunc|noerror|sync|fsync] [iflag=skip_bytes]")
+//usage:#define dd_full_usage "\n\n"
+//usage: "Copy a file with converting and formatting\n"
+//usage: "\n if=FILE Read from FILE instead of stdin"
+//usage: "\n of=FILE Write to FILE instead of stdout"
+//usage: "\n bs=N Read and write N bytes at a time"
+//usage: IF_FEATURE_DD_IBS_OBS(
+//usage: "\n ibs=N Read N bytes at a time"
+//usage: )
+//usage: IF_FEATURE_DD_IBS_OBS(
+//usage: "\n obs=N Write N bytes at a time"
+//usage: )
+//usage: "\n count=N Copy only N input blocks"
+//usage: "\n skip=N Skip N input blocks"
+//usage: "\n seek=N Skip N output blocks"
+//usage: IF_FEATURE_DD_IBS_OBS(
+//usage: "\n conv=notrunc Don't truncate output file"
+//usage: "\n conv=noerror Continue after read errors"
+//usage: "\n conv=sync Pad blocks with zeros"
+//usage: "\n conv=fsync Physically write data out before finishing"
+//usage: "\n conv=swab Swap every pair of bytes"
+//usage: "\n iflag=skip_bytes skip=N is in bytes"
+//usage: )
+//usage: IF_FEATURE_DD_STATUS(
+//usage: "\n status=noxfer Suppress rate output"
+//usage: "\n status=none Suppress all output"
+//usage: )
+//usage: "\n"
+//usage: "\nN may be suffixed by c (1), w (2), b (512), kB (1000), k (1024), MB, M, GB, G"
+//usage:
+//usage:#define dd_example_usage
+//usage: "$ dd if=/dev/zero of=/dev/ram1 bs=1M count=4\n"
+//usage: "4+0 records in\n"
+//usage: "4+0 records out\n"
+
+#include "libbb.h"
+#include "common_bufsiz.h"