kill: New option --wait.

[dss.git] / dss.suite

diff --git a/dss.suite b/dss.suite
index e7473cb6d2f4ab619c753262664ff5c377ed21c6..d4926c3117ab214461d44b359beb02e77bfcd9f5 100644 (file)
--- a/dss.suite
+++ b/dss.suite
@@ -109,6 +109,29 @@ caption = Subcommands
                        Set this if the user that runs dss is different from the user on the
                        remote host.
                [/help]
+       [option checksum]
+               summary = run rsync with --checksum occasionally
+               typestr = permille
+               arg_info = required_arg
+               arg_type = uint32
+               default_val = 0
+               [help]
+                       If a file on the backup becomes corrupt in a way that file size
+                       and modification time still match the original file, rsync will not
+                       consider the file for transfer ("quick check"). Hence the corruption
+                       stays on the backup until the file is modified on the source.
+                       The --checksum option of rsync disables the quick check and compares
+                       the contents of each file, fixing such corruptions. Since computing
+                       the checksums adds a significant slowdown due to a lot of disk I/O,
+                       the option is not enabled by default.
+
+                       The argument to the --checksum option of dss is a number between 0
+                       and 1000, inclusively, which determines the probability of adding
+                       --checksum to the rsync options each time a snapshot is created. The
+                       default value zero means to never add the option. The value 100 will
+                       create every tenth snapshot (on average) using checksums, and the
+                       value 1000 will always pass --checksum to rsync.
+               [/help]
        [option rsync-option]
                short_opt = O
                summary = further rsync options
@@ -452,6 +475,27 @@ caption = Subcommands
 
                        Sending SIGHUP causes the running dss process to reload its config file.
                [/help]
+       [option wait]
+               short_opt = w
+               summary = wait until the signalled process has terminated
+               [help]
+                       This option is handy for system shutdown scripts which would like
+                       to terminate the dss daemon process.
+
+                       Without --wait the dss process which executes the kill subcommand
+                       exits right after the kill(2) system call returns. At this point the
+                       signalled process might still be alive (even if SIGKILL was sent).
+                       If --wait is given, the process waits until the signalled process
+                       has terminated or the timeout expires.
+
+                       If --wait is not given, the kill subcommand exits successfully if
+                       and only if the signal was sent (i.e., if there exists another dss
+                       process to receive the signal). With --wait it exits successfully
+                       if, additionally, the signalled process has terminated before the
+                       timeout expires.
+
+                       It makes only sense to use the option for signals which terminate dss.
+               [/help]
 
 [section copyright]
        Written by Andre Noll