od command behavior change

[Mori Hiroki]

Hi.

I checked usr.bin/hexdump code. But I can't found reason.

I seem j option and device file is cause of this problem.

# od -N 6 -t x1 -j 4 /dev/flash/spi0s.u-boot-env
od: /dev/flash/spi0s.u-boot-env: Invalid argument
0000004

# od -N 6 -t x1 /dev/flash/spi0s.u-boot-env
0000000    50  30  00  01  00  18                                        
0000006

# dd if=/dev/flash/spi0s.u-boot-env of=/tmp/aaa
# od -N 6 -t x1 -j 4 /tmp/aaa
0000004    00  18  84  32  96  00                                        
0000012



----- Original Message -----
>From: Mori Hiroki <yamori813 at yahoo.co.jp>
>To: "freebsd-mips at freebsd.org" <freebsd-mips at freebsd.org> 
>Date: 2018/2/14, Wed 11:32
>Subject: od command behavior change
> 
>Hi
>
>I use od command get mac address from flash.
>
>CURRENT od command change behavior.
>
>OLD od
>
># od -j 0x0004 -N 6 -t x1 /dev/flash/spi0s.u-boot-env
>0000004    00  18  84  12  34  56                                        
>0000012
>
>CURRENT od
>
># od -j 0x0004 -N 6 -t x1 /dev/flash/spi0s.u-boot-env
>od: /dev/flash/spi0s.u-boot-env: Invalid argument
>0000004
>
>Is this bug?
>
>Hiroki Mori
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>