116 lines
2.1 KiB
Bash
Executable File
116 lines
2.1 KiB
Bash
Executable File
#!/bin/sh
|
|
set -eu
|
|
|
|
# Remove dump files with a given prefix while keeping the most recent N days (default 7).
|
|
|
|
PROG=${0##*/}
|
|
|
|
usage() {
|
|
cat <<USAGE
|
|
Usage: $PROG --prefix=NAME [--dir=DIR] [--days=N]
|
|
|
|
--prefix=NAME Filename prefix to match (required).
|
|
--dir=DIR Directory to scan (default: current directory).
|
|
--days=N Retention window in days (default: 7).
|
|
--help Show this help text.
|
|
USAGE
|
|
}
|
|
|
|
error() {
|
|
printf '%s: %s\n' "$PROG" "$1" >&2
|
|
}
|
|
|
|
die_with_usage() {
|
|
error "$1"
|
|
usage >&2
|
|
exit 1
|
|
}
|
|
|
|
PREFIX=""
|
|
TARGET_DIR="."
|
|
RETENTION_DAYS=7
|
|
|
|
while [ "$#" -gt 0 ]; do
|
|
case $1 in
|
|
--prefix=*)
|
|
PREFIX="${1#*=}"
|
|
;;
|
|
--prefix)
|
|
shift
|
|
[ "$#" -gt 0 ] || die_with_usage 'Missing value for --prefix'
|
|
PREFIX="$1"
|
|
;;
|
|
--dir=*)
|
|
TARGET_DIR="${1#*=}"
|
|
;;
|
|
--dir)
|
|
shift
|
|
[ "$#" -gt 0 ] || die_with_usage 'Missing value for --dir'
|
|
TARGET_DIR="$1"
|
|
;;
|
|
--days=*)
|
|
RETENTION_DAYS="${1#*=}"
|
|
;;
|
|
--days)
|
|
shift
|
|
[ "$#" -gt 0 ] || die_with_usage 'Missing value for --days'
|
|
RETENTION_DAYS="$1"
|
|
;;
|
|
-h|--help)
|
|
usage
|
|
exit 0
|
|
;;
|
|
--)
|
|
shift
|
|
break
|
|
;;
|
|
-*)
|
|
die_with_usage "Unknown option: $1"
|
|
;;
|
|
*)
|
|
if [ -z "$PREFIX" ]; then
|
|
PREFIX="$1"
|
|
else
|
|
die_with_usage "Unexpected positional argument: $1"
|
|
fi
|
|
;;
|
|
esac
|
|
shift
|
|
|
|
done
|
|
|
|
if [ -z "$PREFIX" ] && [ "$#" -gt 0 ]; then
|
|
PREFIX="$1"
|
|
shift
|
|
fi
|
|
|
|
if [ -z "$PREFIX" ]; then
|
|
die_with_usage 'A prefix is required.'
|
|
fi
|
|
|
|
if [ "$#" -gt 0 ]; then
|
|
die_with_usage "Unexpected positional argument: $1"
|
|
fi
|
|
|
|
case $RETENTION_DAYS in
|
|
''|*[!0-9]*)
|
|
die_with_usage "Retention days must be a non-negative integer: $RETENTION_DAYS"
|
|
;;
|
|
*)
|
|
:
|
|
;;
|
|
esac
|
|
|
|
if [ ! -d "$TARGET_DIR" ]; then
|
|
error "Directory not found: $TARGET_DIR"
|
|
exit 1
|
|
fi
|
|
|
|
# find's +N semantics removes files strictly older than N days, leaving the N day window intact.
|
|
find "$TARGET_DIR" \
|
|
-maxdepth 1 \
|
|
-type f \
|
|
-name "${PREFIX}*" \
|
|
-mtime +"$RETENTION_DAYS" \
|
|
-print -delete
|