2016-01-11 15:50:55 +0000, Stephane Chazelas: [...] > $ printf '|\uFF21\b\b|\n' > || > $ printf '|\uFF21\b|\n' > | | > > in both xterm and gnome-terminal. As in, you need two backspace > characters to delete that character. With only one, the cursor > moves back one column, and if you write another character, the > double-width glyph is erased (leaving an empty single-width > space and your replacement character). > > So it's right that colrm should assume that > <a-double-width-charater>\b\b doesn't change the cursor > position. [...]
FWIW, the colrm on Debian from bsdmainutils 9.0.3 seems to behave properly: $ printf '%b123\n' xaa 'x\uFF21' 'xa\bba\bb' 'x\uFF21\b\bbb' xaa123 xＡ123 xbb123 xbb123 $ printf '%b123\n' xaa 'x\uFF21' 'xa\bba\bb' 'x\uFF21\b\bbb' | colrm 1 3 123 123 123 123 (copy-pasted from xterm). -- Stephane
