tests/posix: dd(1p) #23

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trinity · 2023-12-30T08:44:13-07:00

trinity commented

2023-12-30 08:44:13 -07:00

In order to go about implementing dd(1) in a shell script we must first have feature parity. dd(1p) does the following things:

input/output direction (dd if=in of=out) and control (dd ibs=1024 obs=128 skip=5 seek=10 count=1) - see dj(1), #15
case conversion (dd conv=lcase, dd conv=ucase)
endianness swapping (dd conv=swab) - see swab(1), #22
character set conversion (dd conv=ascii, dd conv=ebcdic, dd conv=ibm)
block alignment stuff (dd conv=block, dd conv=ublock)

In order to go about implementing [dd(1)](https://www.man7.org/linux/man-pages/man1/dd.1p.html) in a shell script we must first have feature parity. dd(1p) does the following things: - input/output direction (`dd if=in of=out`) and control (`dd ibs=1024 obs=128 skip=5 seek=10 count=1`) - see dj(1), #15 - case conversion (`dd conv=lcase`, `dd conv=ucase`) - endianness swapping (`dd conv=swab`) - see swab(1), #22 - character set conversion (`dd conv=ascii`, `dd conv=ebcdic`, `dd conv=ibm`) - block alignment stuff (`dd conv=block`, `dd conv=ublock`)

trinity referenced this issue

2023-12-30 08:46:13 -07:00

dj(1) - disk jockey #15

trinity commented

2023-12-30 08:47:22 -07:00

Emma and I have discussed a solution to input/output direction, mm(1), which will replace cat(1p) and tee(1p). I've yet to write a utility proposal though.

trinity referenced this issue

2023-12-30 08:47:51 -07:00

`swab(1)` - swap bytes #22

emma changed title from ~~dd(1p)~~ to tests/posix: dd(1p)

2023-12-30 11:05:18 -07:00

emma added the

enhancement

label 2023-12-30 11:05:42 -07:00

emma changed title from ~~tests/posix: dd(1p)~~ to tests/posix: `dd(1p)`

2024-01-23 15:07:53 -07:00

trinity self-assigned this 2024-01-29 16:25:20 -07:00

emma commented