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bug: 'vi-fword' binding command does the same as 'vi-fWord'

From: Andrey Butirsky
Subject: bug: 'vi-fword' binding command does the same as 'vi-fWord'
Date: Sun, 29 Dec 2019 23:45:22 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:72.0) Gecko/20100101 Thunderbird/72.0


the bug is: if any Readline binding command names differs only in character's case, these commands is indistinguishable and do the same function.

For example, 'vi-fword' binding command erroneously does the same as 'vi-fWord' one, that is - jumps on "big" (space separated) words; while it is alias of||"vi-forward-word" command and as such should jump on a "small" vi words. For 'vi-fWord', "vi-forward-bigword" alias exists:

|http://git.savannah.gnu.org/cgit/readline.git/tree/funmap.c?h=readline-6.3&id=3fede80c7ae9d396a98137ec8e7188a27c327e96#n174 funmap.c:   { "vi-fWord", rl_vi_fWord }, .... { "vi-forward-bigword", rl_vi_fWord }, { "vi-forward-word", rl_vi_fword }, { "vi-fword", rl_vi_fword },|

This occurs due _rl_stricmp() function used to compare names is caseless, and "vi-fWord" name happened to encounter first in the array above:


|/* strcmp (), but caseless (strcasecmp). */ int _rl_stricmp (string1, string2) char *string1, *string2; { |

To reproduce:

$ bind '"\eF": vi-fWord'

try it, then

$ bind '"\eF": vi-fword'

See there is no difference in the Meta + F key shortcut - it still jumps over "big" space-delimited words.


$ bind '"\eF": vi-forward-word'

It starts jump on "small" vi words, however - it is alias for "vi-fword".



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