74 lines
1.6 KiB
Text
74 lines
1.6 KiB
Text
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# simple expansion -- no problem, it's quote_string_for_globbing that was flawed
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c=$'\177'
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r="\\$c"
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recho $r
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# first, match some regular expressions containing ^A, ^G, ^?
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[[ $'\001' =~ $'\001' ]] ; echo $?
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[[ $'\001' =~ $'\\\001' ]] ; echo $?
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[[ $'\001' =~ $'\\[\001]' ]] ; echo $?
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[[ $'\a' =~ $'\a' ]] ; echo $?
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[[ $'\a' =~ $'\\\a' ]] ; echo $?
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[[ $'\a' =~ $'\\[\a]' ]] ; echo $?
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[[ $'\177' =~ $'\177' ]] ; echo $?
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[[ $'\177' =~ $'\\\177' ]] ; echo $?
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[[ $'\177' =~ $'\\[\177]' ]] ; echo $?
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# Now let's try it with variables expanding to those values
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for c in $'\001' $'\a' $'\177' ; do
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for r in "$c" "\\$c" "\\[$c]"; do
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[[ $c =~ $r ]];
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printf '[[ %q =~ %q ]] -> %d\n' "$c" "$r" "$?";
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done;
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printf %s\\n ---
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done
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# try again with literals
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[[ '' =~ $'' ]] ; echo $?
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[[ '' =~ '\' ]] ; echo $?
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[[ '' =~ '\[]' ]] ; echo $?
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[[ '' =~ '' ]] ; echo $?
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[[ '' =~ '\' ]] ; echo $?
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[[ '' =~ '\[]' ]] ; echo $?
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[[ '' =~ $'' ]] ; echo $?
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[[ '' =~ '\' ]] ; echo $?
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[[ '' =~ '\[]' ]] ; echo $?
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# more expansions, but with literal non-special characters
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[[ x =~ \x ]] ; echo $?
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[[ x =~ \\x ]] ; echo $?
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bs='\'
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[[ x =~ ${bs}x ]] ; echo $?
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[[ x =~ $'\\'x ]] ; echo $?
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[[ x =~ '\'x ]] ; echo $?
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v='a\-b'
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[[ a-b =~ ${v} ]] ; echo $?
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[[ a-b =~ a\-b ]]; echo $?
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[[ a-b =~ a${bs}-b ]]; echo $?
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[[ a-b =~ a\\-b ]] ; echo $?
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[[ a-b =~ "a\-b" ]] ; echo $?
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c=$'\001'
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recho $c "$c"
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[[ $c == $c ]] && echo ok 1
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[[ $c =~ $c ]] && echo ok 2
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[[ $c =~ \\$c ]] || echo ok 3
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[[ $c =~ \\"$c" ]] || echo ok 4
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[[ $c =~ "\\"$c ]] || echo ok 5
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[[ $c =~ '\'$c ]] || echo ok 6
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[[ $c =~ "\\""$c" ]] || echo ok 7
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[[ $c =~ '\'"$c" ]] || echo ok 8
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