107 lines
2.7 KiB
Bash
107 lines
2.7 KiB
Bash
# shellcheck shell=bash
|
|
|
|
__usage() {
|
|
if (($1 < $2)); then
|
|
printf 'Usage: %s %s\n' "${FUNCNAME[1]}" "$3"
|
|
return 1
|
|
fi
|
|
return 0
|
|
}
|
|
|
|
__isnumber() {
|
|
[[ $1 == ?([+-])+([0-9])?([.,]+([0-9])) ]]
|
|
}
|
|
|
|
count() { # Counts the number of characters in a string
|
|
__usage $# 1 '<string>' || return 1
|
|
printf '%d\n' "${#1}"
|
|
}
|
|
|
|
trim() { # Trims leading and trailing whitespace
|
|
__usage $# 1 '<string>' || return 1
|
|
: "${1#"${1%%[![:space:]]*}"}"
|
|
: "${_%"${_##*[![:space:]]}"}"
|
|
printf '%s\n' "$_"
|
|
}
|
|
|
|
rot13() { # Encodes/Decodes string in rot13
|
|
__usage $# 1 '<string>' || return 1
|
|
tr 'A-Za-z' 'N-ZA-Mn-za-m' <<< "$1"
|
|
}
|
|
|
|
tempconv() { # Converts Fahrenheit to Celsius and vice versa
|
|
__usage $# 2 '<c | f> <degree>' || return 1
|
|
if ! __isnumber "$2"; then
|
|
printf 'The second argument must be a number.\n' >&2
|
|
return 1
|
|
fi
|
|
case "$1" in
|
|
[Ff]) printf '%d\u02DAC\n' "$((5 * ($2 - 32) / 9))"; return ;;
|
|
[Cc]) printf '%d\u02DAF\n' "$(($2 * 9 / 5 + 32))"; return ;;
|
|
*) __usage 0 1 '<c | f> <degree>' || return 1
|
|
esac
|
|
}
|
|
|
|
rgb2hex() { # Converts rgb colour to hex
|
|
__usage $# 3 '<red> <green> <blue>' || return 1
|
|
printf '#%02x%02x%02x\n' "$1" "$2" "$3"
|
|
}
|
|
|
|
hex2rgb() { # Converts hex colour to rgb
|
|
__usage $# 1 '<hex>' || return 1
|
|
declare -i r g b
|
|
((r=16#${1:0:2},g=16#${1:2:2},b=16#${1:4:2}))
|
|
printf '%s %s %s\n' $r $g $b
|
|
}
|
|
|
|
shuffle() { # Shuffles letters in string
|
|
__usage $# 1 '<string>' || return 1
|
|
perl -MList::Util=shuffle -F'' \
|
|
-lane 'print shuffle @F' <<< "$1"
|
|
}
|
|
|
|
weather() { # Shows weather info from wttr.in
|
|
__usage $# 1 '<place> [country]' || return 1
|
|
curl -fsS4 "v2d.wttr.in/${1}+${2:-Greece}" | head -n -2
|
|
}
|
|
|
|
sri() { # Prints the SRI hash of a resource
|
|
__usage $# 1 '<URL> [bits]' || return 1
|
|
printf 'sha%d-%s\n' "${2:-384}" \
|
|
"$(curl -Ss "$1" | shasum -ba "${2:-384}" - | xxd -r -p | base64)"
|
|
}
|
|
|
|
myip() { # What's my ip
|
|
dig +short +tls A myip.opendns.com @resolver1.opendns.com
|
|
}
|
|
|
|
urlencode() { # Encodes string for url
|
|
__usage $# 1 '<string>' || return 1
|
|
declare LANG=C len=${#1} char i
|
|
for ((i = 0; i < len; ++i)); do
|
|
char="${1:i:1}"
|
|
case $char in
|
|
[a-zA-Z0-9.~_-]) printf '%s' "$char" ;;
|
|
*) printf '%%%02X' "'$char" ;;
|
|
esac
|
|
done
|
|
}
|
|
|
|
urldecode() { # Decodes urlencoded string
|
|
__usage $# 1 '<string>' || return 1
|
|
printf '%b\n' "${*//%/\\x}"
|
|
}
|
|
|
|
utf8decode() { # Decodes =?UTF-8?B?...?= string
|
|
__usage $# 1 '<string>' || return 1
|
|
[[ $* =~ ^=\?[Uu][Tt][Ff]-8\?[Bb]\?([^?]+)\?=$ ]]
|
|
printf '%s\n' "$(base64 -d <<< "${BASH_REMATCH[1]}")"
|
|
}
|
|
|
|
iso2usb() { # Writes an iso to a usb device
|
|
__usage $# 2 '<iso> <usb> [bs]' || return 1
|
|
sudo dd if="$1" of="$2" status=progress bs="${3:-4M}" oflag=sync
|
|
}
|
|
|
|
# vim:fdm=syntax:fdl=0:
|