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Introduce consistent time sorting

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Based on patches by John Lawless <jlawless@redwoodscientific.com>.
Skipped the sort changing part (from -tc to -t)

c.patch:

--- ccollect-0.7.1-b.sh	2009-05-24 21:32:00.000000000 -0700
+++ ccollect-0.7.1-c.sh	2009-05-24 21:39:43.000000000 -0700
@@ -40,10 +40,13 @@
 VERSION=0.7.1
 RELEASE="2009-02-02"
 HALF_VERSION="ccollect ${VERSION}"
 FULL_VERSION="ccollect ${VERSION} (${RELEASE})"

+#TSORT="tc" ; NEWER="cnewer"
+TSORT="t" ; NEWER="newer"
+
 #
 # CDATE: how we use it for naming of the archives
 # DDATE: how the user should see it in our output (DISPLAY)
 #
 CDATE="date +%Y%m%d-%H%M"
@@ -513,14 +516,14 @@

    #
    # Check for backup directory to clone from: Always clone from the latest one!
    #
-   # Use ls -1c instead of -1t, because last modification maybe the same on all
-   # and metadate update (-c) is updated by rsync locally.
-   #
-   last_dir="$(pcmd ls -tcp1 "${ddir}" | grep '/$' | head -n 1)" || \
+   # Depending on your file system, you may want to sort on:
+   #   1. mtime (modification time) with TSORT=t, or
+   #   2. ctime (last change time, usually) with TSORT=tc
+   last_dir="$(pcmd ls -${TSORT}p1 "${ddir}" | grep '/$' | head -n 1)" || \
       _exit_err "Failed to list contents of ${ddir}."

    #
    # clone from old backup, if existing
    #

d.patch:

--- ccollect-0.7.1-c.sh	2009-05-24 21:39:43.000000000 -0700
+++ ccollect-0.7.1-d.sh	2009-05-24 21:47:09.000000000 -0700
@@ -492,12 +492,12 @@
    if [ "${count}" -ge "${c_interval}" ]; then
       substract=$((${c_interval} - 1))
       remove=$((${count} - ${substract}))
       _techo "Removing ${remove} backup(s)..."

-      pcmd ls -p1 "$ddir" | grep "^${INTERVAL}\..*/\$" | \
-        sort -n | head -n "${remove}" > "${TMP}"      || \
+      pcmd ls -${TSORT}p1r "$ddir" | grep "^${INTERVAL}\..*/\$" | \
+        head -n "${remove}" > "${TMP}"      || \
         _exit_err "Listing old backups failed"

       i=0
       while read to_remove; do
          eval remove_$i=\"${to_remove}\"

Signed-off-by: Nico Schottelius <nico@ikn.schottelius.org>
This commit is contained in:
Nico Schottelius 2009-06-10 09:50:05 +02:00
commit 62e8190a94
1 changed files with 5 additions and 3 deletions
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8
ccollect.sh
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@ -45,9 +45,11 @@ FULL_VERSION="ccollect ${VERSION} (${RELEASE})"
#
# CDATE: how we use it for naming of the archives
# DDATE: how the user should see it in our output (DISPLAY)
# TSORT: how to sort: tc = ctime, t = mtime
#
CDATE="date +%Y%m%d-%H%M"
DDATE="date +%Y-%m-%d-%H:%M:%S"
TSORT="tc"
#
# unset parallel execution
@ -491,8 +493,8 @@ while [ "${i}" -lt "${no_sources}" ]; do
remove=$((${count} - ${substract}))
_techo "Removing ${remove} backup(s)..."
pcmd ls -p1 "$ddir" | grep "^${INTERVAL}\..*/\$" | \
sort -n | head -n "${remove}" > "${TMP}" || \
pcmd ls -${TSORT}p1r "$ddir" | grep "^${INTERVAL}\..*/\$" | \
head -n "${remove}" > "${TMP}" || \
_exit_err "Listing old backups failed"
i=0
@ -518,7 +520,7 @@ while [ "${i}" -lt "${no_sources}" ]; do
# Use ls -1c instead of -1t, because last modification maybe the same on all
# and metadate update (-c) is updated by rsync locally.
#
last_dir="$(pcmd ls -tcp1 "${ddir}" | grep '/$' | head -n 1)" || \
last_dir="$(pcmd ls -${TSORT}p1 "${ddir}" | grep '/$' | head -n 1)" || \
_exit_err "Failed to list contents of ${ddir}."
#