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35 lines
1.5 KiB
Bash
Executable File
35 lines
1.5 KiB
Bash
Executable File
#!/usr/bin/env sh
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# Removes a bunch of stuff and adds the IPs if missing.
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# All empty lines, anything pointing to localhost, comments, trailing whitespaces, multiple spaces, tabs, etc. get removed.
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# All domains should point to 127.0.0.1
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# If any of the domains exist in the whitelist it's ignored.
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# Once everything is clean the file gets sorted and any duplicate gets removed.
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#
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for file in "$@"; do
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[ ! -f "$file" ] && echo "$file does not exist" && continue
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# Remove comments, stuff pointing to localhost, whitespaces, tabs, etc.
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sed -i 's/#.*$//g;/^$/d;/localhost$/d;/::/d;/local$/d;/localdomain$/d;/broadcasthost$/d;/0.0.0.0$/d;/^[[:space:]]*$/d;s/[ \t]*$//g;s/^[ \t]*//g;s/[[:blank:]]/ /g' "$file"
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# All domains should point to 127.0.0.1
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## Add it to all lines not starting with an IP address
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sed -i -r '/^([0-9]{1,3}\.){3}[0-9]{1,3} /! s/^/127.0.0.1 /' "$file"
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## Replace all IPs with 127.0.0.1
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sed -i -r 's/^([0-9]{1,3}\.){3}[0-9]{1,3} /127.0.0.1 /g' "$file"
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## Remove any lines pointing to an IP address, hosts file only works with domains or hostnames
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sed -i -r '/ ([0-9]{1,3}\.){3}[0-9]{1,3}$/d' "$file"
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# Remove multiple spaces (If anybody knows how to do this with sed please let me know)
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tr -s ' ' < "$file" > "$file.tmp"
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# Remove any domain that exists in the whitelist
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grep -v -x -f ../whitelist "$file.tmp" > "$file.tmp2"
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# Remove duplicates
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sort < "$file.tmp2" | uniq > "$file"_clean
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# Remove the old files
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rm "$file.tmp" "$file.tmp2" "$file"
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done
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