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Merge pull request #1455 from YunoHost/enh-ynh_string_random

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Improve ynh_string_random
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Alexandre Aubin 2022-04-18 15:29:17 +02:00 • committed by GitHub
commit ccc83412c9
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1 changed files with 6 additions and 3 deletions
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9
helpers/string
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@ -4,6 +4,7 @@
#
# usage: ynh_string_random [--length=string_length]
# | arg: -l, --length= - the string length to generate (default: 24)
# | arg: -f, --filter= - the kind of characters accepted in the output (default: 'A-Za-z0-9')
# | ret: the generated string
#
# example: pwd=$(ynh_string_random --length=8)
@ -11,15 +12,17 @@
# Requires YunoHost version 2.2.4 or higher.
ynh_string_random() {
# Declare an array to define the options of this helper.
local legacy_args=l
local -A args_array=([l]=length=)
local legacy_args=lf
local -A args_array=([l]=length= [f]=filter=)
local length
local filter
# Manage arguments with getopts
ynh_handle_getopts_args "$@"
length=${length:-24}
filter=${filter:-'A-Za-z0-9'}
dd if=/dev/urandom bs=1 count=1000 2>/dev/null \
| tr --complement --delete 'A-Za-z0-9' \
| tr --complement --delete "$filter" \
| sed --quiet 's/\(.\{'"$length"'\}\).*/\1/p'
}