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Improve usage statement

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This commit is contained in:
Kevin McCormick 2016-08-04 16:29:28 -07:00
parent f2b40a2ce8
commit 481212e5e6
1 changed files with 15 additions and 8 deletions
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backup-zfs
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@ -3,14 +3,21 @@
prog="$(basename "$0")" prog="$(basename "$0")"
usage() { usage() {
echo "$(basename "$0") [-hvq] [-t tag] [-k keep] [-d dateopts] [srchost:]srcfs [desthost:]destfs" >&2 cat >&2 <<-EOF
echo "$(basename "$0"): use zfs send/recv to push/pull snapshots" >&2 usage: $prog [-hvq] [-t tag] [-k keep] [-d dateopts] src dest
printf "%15s: %s\n" >&2 "-h" "this help statement" \ use zfs send/recv to push/pull snapshots
"-v" "verbose" \
"-q" "quiet" \ src the source fs, specified as [host:]pool/path/to/fs
"-t tag" "tag to use for naming snapshots and in syslog" \ dest the destination fs parent, specified as [host:]pool/path/to/fs
"-k keep" "number of snapshots to keep on src" \ (the final path component of src will be appended to dest)
"-d dateopts" "options string for date(1), used in naming snapshots"
-h help
-v verbose mode
-q quiet mode
-t tag tag to use for naming snapshots (default: backup-zfs)
-k keep number of snapshots to keep on src (default: 5)
-d dateopts options for date(1) - used to name the snapshots (default: +%F_%T)
EOF
exit $1 exit $1
} }