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30 lines
1.1 KiB
Text
30 lines
1.1 KiB
Text
# Generate a random string
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#
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# example: pwd=$(ynh_string_random 8)
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#
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# usage: ynh_string_random [length]
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# | arg: length - the string length to generate (default: 24)
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ynh_string_random() {
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dd if=/dev/urandom bs=1 count=200 2> /dev/null \
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| tr -c -d 'A-Za-z0-9' \
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| sed -n 's/\(.\{'"${1:-24}"'\}\).*/\1/p'
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}
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# Substitute/replace a string (or expression) by another in a file
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#
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# usage: ynh_replace_string match_string replace_string target_file
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# | arg: match_string - String to be searched and replaced in the file
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# | arg: replace_string - String that will replace matches
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# | arg: target_file - File in which the string will be replaced.
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#
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# As this helper is based on sed command, regular expressions and
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# references to sub-expressions can be used
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# (see sed manual page for more information)
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ynh_replace_string () {
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delimit=@
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match_string=${1//${delimit}/"\\${delimit}"} # Escape the delimiter if it's in the string.
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replace_string=${2//${delimit}/"\\${delimit}"}
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workfile=$3
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sudo sed --in-place "s${delimit}${match_string}${delimit}${replace_string}${delimit}g" "$workfile"
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}
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