Re: sh emulation POSIX non-conformances (printf %10s and bytes vs character)

[Stephane Chazelas <stephane@xxxxxxxxxxxx>]

2021-04-11 18:57:26 +0100, Stephane Chazelas:
> Some non-POSIX conformances I can think of ATM:
[...]

Another POSIX bug fixed by zsh (but which makes it non-compliant):

With multibyte characters:

$ printf '|%10s|\n' Stéphane Chazelas
|  Stéphane|
|  Chazelas|

POSIX requires:

| Stéphane|
|  Chazelas|

(with a UTF-8 é encoded one 2 bytes), that is, the width to be
a number of bytes not characters.

ksh93 has printf %20Ls where width is based on the display width
of characters.

$ zsh -c "printf '|%10Ls|\n' Ste$'\u0301'phane Chazelas"
| Stéphane|
|  Chazelas|
$ ksh -c "printf '|%10Ls|\n' Ste$'\u0301'phane Chazelas"
|  Stéphane|
|  Chazelas|

(that one is not specified by POSIX)


-- 
Stephane