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|
# utilities.sh
# Craig Jennings <c@cjennings.net>
# General utility functions
# =============================================================================
# Archive Extraction
# =============================================================================
extract() {
if [ -f "$1" ]; then
case "$1" in
*.tar.bz2) tar xjf "$1" ;;
*.tar.gz) tar xzf "$1" ;;
*.bz2) bunzip2 "$1" ;;
*.rar) rar x "$1" ;;
*.gz) gunzip "$1" ;;
*.tar) tar xf "$1" ;;
*.tbz2) tar xjf "$1" ;;
*.tgz) tar xzf "$1" ;;
*.zip) unzip "$1" ;;
*.Z) uncompress "$1" ;;
*) echo "$1 cannot be extracted via extract()" ;;
esac
else
echo "$1 is not a valid file"
fi
}
# =============================================================================
# Archive Compression
# =============================================================================
compress() {
if [ $# -ne 2 ]; then
echo "Usage: compress <format> <file_or_directory>"
echo "Formats: tar.bz2, tar.gz, bz2, tar, tbz2, tgz, zip, gz, Z"
return 1
fi
format="$1"
target="$2"
if [ ! -e "$target" ]; then
echo "Error: '$target' does not exist"
return 1
fi
basename=$(basename "$target")
case "$format" in
tar.bz2|tbz2) output="${basename}.tar.bz2" ;;
tar.gz|tgz) output="${basename}.tar.gz" ;;
bz2) output="${target}.bz2" ;;
gz) output="${target}.gz" ;;
tar) output="${basename}.tar" ;;
zip) output="${basename}.zip" ;;
Z) output="${target}.Z" ;;
*)
echo "Error: Unknown format '$format'"
return 1
;;
esac
if [ -e "$output" ]; then
printf "Warning: '%s' already exists. Overwrite? (y/N): " "$output"
read -r response
case "$response" in
[yY]|[yY][eE][sS]) rm -f "$output" ;;
*) echo "Aborted." && return 1 ;;
esac
fi
case "$format" in
tar.bz2|tbz2) tar -cjf "$output" "$target" ;;
tar.gz|tgz) tar -czf "$output" "$target" ;;
bz2)
[ -d "$target" ] && echo "Error: bz2 only works on files" && return 1
bzip2 -k "$target"
;;
gz)
[ -d "$target" ] && echo "Error: gz only works on files" && return 1
gzip -k "$target"
;;
tar) tar -cf "$output" "$target" ;;
zip)
[ -d "$target" ] && zip -r "$output" "$target" || zip "$output" "$target"
;;
Z)
[ -d "$target" ] && echo "Error: Z only works on files" && return 1
command compress -c "$target" > "$output"
;;
esac
[ $? -eq 0 ] && echo "Created $output" || echo "Compression failed"
}
# =============================================================================
# DD Helper
# =============================================================================
dd_with_bs() {
OUT_DIR=$(dirname "$2")
if [ ! -e "$1" ] || [ ! -e "$OUT_DIR" ]; then
echo "$1 or $OUT_DIR doesn't exist"
return 1
fi
IN_BS=$(stat -c "%o" "$1")
OUT_BS=$(stat -c "%o" "$OUT_DIR")
echo dd \"if=$1\" \"of=$2\" \"ibs=$IN_BS\" \"obs=$OUT_BS\"
}
# =============================================================================
# Clock, Timer, Alarm, Stopwatch
# =============================================================================
export BEEP="/usr/share/sounds/freedesktop/stereo/bell.oga"
alias beep='paplay $BEEP'
clock() {
while true; do
tput clear
echo ""
date +" %l : %M %p" | figlet -f roman -w 200
sleep 1
done
}
timer() {
if [ "$#" -lt 2 ]; then
echo "Pass the time and a notification. Example: timer 1h30m Parking expiring"
return 1
fi
message="${*:2}"
start_time=$(date +"%H:%M:%S %p")
printf "\nStarting %s timer at %s\n" "$1" "$start_time"
snore "$1" && paplay "$BEEP" && notify-send "Timer" "$message"
}
alarm() {
if [ "$#" -lt 2 ]; then
echo "Pass both the time and a message. Example: alarm 1:45pm Time to eat!"
return 1
fi
if ! date -d "$1" >/dev/null 2>&1; then
echo "Invalid time: $1"
return 1
fi
echo "paplay \$BEEP && notify-send \"Alarm\" \"$*\"" | at "$1" >/dev/null 2>&1
echo ""
echo "Alarm '${*:2}' is queued for $1."
echo "To see all alarms: atq"
echo "To remove an alarm: atrm <number>"
echo ""
}
# Stopwatch
sw_start_time=0
sw_started=0
swreset() {
sw_start_time=0
sw_started=0
echo "Stopwatch reset"
}
swshow() {
if [ "$sw_started" = 0 ]; then
echo "Error: Stopwatch not started" >&2
return 1
fi
current_time=$(date +%s)
elapsed_time=$((current_time - sw_start_time))
if [ "$elapsed_time" -lt 60 ]; then
echo "Elapsed time: $elapsed_time seconds"
elif [ "$elapsed_time" -lt 3600 ]; then
minutes=$((elapsed_time / 60))
seconds=$((elapsed_time % 60))
echo "Elapsed time: $minutes minutes, $seconds seconds"
else
hours=$((elapsed_time / 3600))
minutes=$(((elapsed_time / 60) % 60))
seconds=$((elapsed_time % 60))
echo "Elapsed time: $hours hours, $minutes minutes, $seconds seconds"
fi
}
swstop() {
swshow
swreset
}
swstart() {
if [ "$sw_started" = 1 ]; then
printf "Stopwatch is already started. Reset? (y/n): "
read -r answer
case "$answer" in
[yY]) swreset ;;
[nN]) echo "Stopwatch not reset." && swshow && return ;;
*) echo "Error: Invalid input." >&2 && return 1 ;;
esac
fi
sw_started=1
sw_start_time=$(date +%s)
printf "Stopwatch started at %s\n\n" "$(date +"%H:%M:%S %p")"
}
|
