diff options
Diffstat (limited to 'src/backupninja.in')
| -rwxr-xr-x | src/backupninja.in | 51 |
1 files changed, 38 insertions, 13 deletions
diff --git a/src/backupninja.in b/src/backupninja.in index aadc162..f6a5b0e 100755 --- a/src/backupninja.in +++ b/src/backupninja.in @@ -313,23 +313,47 @@ function process_action() { debug $run [ "$run" == "no" ] && return - let "actions_run += 1" + # Prepare for lock creation + if [ ! -d /var/lock/backupninja ]; then + mkdir /var/lock/backupninja + fi + lockfile=`echo $file | @SED@ 's,/,_,g'` + lockfile=/var/lock/backupninja/$lockfile - # call the handler: local bufferfile=`maketemp backupninja.buffer` echo "" > $bufferfile - echo_debug_msg=1 + + # start locked section : avoid concurrent execution of the same backup + # uses a construct specific to shell scripts with flock. See man flock for details ( - . $scriptdirectory/$suffix $file - ) 2>&1 | ( - while read a; do - echo $a >> $bufferfile - [ $debug ] && colorize "$a" - done - ) - retcode=$? - # ^^^^^^^^ we have a problem! we can't grab the return code "$?". grrr. - echo_debug_msg=0 + debug "executing handler in locked section controlled by $lockfile" + flock -x -w 5 200 + # if all is good, we acquired the lock + if [ $? -eq 0 ]; then + + let "actions_run += 1" + + # call the handler: + echo_debug_msg=1 + ( + . $scriptdirectory/$suffix $file + ) 2>&1 | ( + while read a; do + echo $a >> $bufferfile + [ $debug ] && colorize "$a" + done + ) + retcode=$? + # ^^^^^^^^ we have a problem! we can't grab the return code "$?". grrr. + echo_debug_msg=0 + + else + # a backup is probably ongoing already, so display an error message + debug "failed to acquire lock" + echo "Fatal: Could not acquire lock $lockfile. A backup is probably already running for $file." >>$bufferfile + fi + ) 200> $lockfile + # end of locked section _warnings=`cat $bufferfile | grep "^Warning: " | wc -l` _errors=`cat $bufferfile | grep "^Error: " | wc -l` @@ -339,6 +363,7 @@ function process_action() { ret=`grep "\(^Info: \|^Warning: \|^Error: \|^Fatal: \|Halt: \)" $bufferfile` rm $bufferfile + if [ $_halts != 0 ]; then msg "*halt* -- $file" errormsg="$errormsg\n== halt request from $file==\n\n$ret\n" |