cr_checkpoint --version (return code: 0)
cr_checkpoint version 0.8.5
cr_checkpoint --help (return code: 0)
Usage: cr_checkpoint [options] ID Options: General options: -v, --verbose print progress messages to stderr. -q, --quiet suppress error/warning messages to stderr. -?, --help print this message and exit. --version print version information and exit. Options for scope of the checkpoint: -T, --tree ID identifies a process id. It and all of its descendants are to be checkpointed. This is the default. -p, --pid, --process ID identifies a single process id. -g, --pgid, --group ID identifies a process group id. -s, --sid, --session ID identifies a session id. Options for destination location of the checkpoint: -c, --cwd checkpoint saved as a single 'context.ID' file in cr_checkpoint's working directory (default). -d, --dir DIR checkpoint saved in new directory DIR, with one 'context.ID' file per process (unimplemented). -f, --file FILE checkpoint saved as FILE. -F, --fd FD checkpoint written to an open file descriptor. Options for creation/replacement policy for checkpoint files: --atomic checkpoint created/replaced atomically (default). --backup[=NAME] checkpoint created atomically, and any existing checkpoint backed up to NAME or *.~1~, *.~2~, etc. --clobber checkpoint written incrementally to target, overwriting any pre-existing checkpoint. --noclobber checkpoint will fail if the target file exists. These options are ignored if the destination is a file descriptor. Options for signal sent to process(es) after checkpoint: --run no signal sent: continue execution (default). -S, --signal NUM signal NUM sent to all processess. --stop SIGSTOP sent to all processes. --term SIGTERM sent to all processes. --abort SIGABRT sent to all processes. --kill SIGKILL sent to all processes. --cont SIGCONT sent to all processes. Options in this group are mutually exclusive. If more than one is given then only the last will be honored. Options for file system synchronization (default is --sync): --sync fsync checkpoint file(s) to disk (default). --nosync do not fsync checkpoint file(s) to disk. Options to save optional portions of memory: --save-exe save the executable file. --save-private save private mapped files. (executables and libraries are mapped this way) --save-shared save shared mapped files. (System V IPC is mapped this way). --save-all save all of the above. --save-none save none of the above (the default). Options for ptraced processes (default is --ptraced-error): --ptraced-error return an error if a checkpoint is requested of a process being ptraced. --ptraced-skip ptraced processes are silently excluded from the checkpoint request. If the checkpoint scope is --tree, then this will also exclude any children of such processes. No error is produced unless this results in zero processes checkpointed. --ptraced-allow checkpoint ptraced processes normally. WARNING: This may require the tracer to "continue" the target process(es), possibly more than once. Options for processes ptracing others (default is --ptracer-error): --ptracer-error return an error if a checkpoint is requested of a process which is ptracing others. --ptracer-skip processes ptracing others are silently excluded from the checkpoint request. If the checkpoint scope is --tree, then this will also exclude any children of such processes. No error is produced unless this results in zero processes checkpointed. Options for kernel log messages (default is --kmsg-error): --kmsg-none don't report any kernel messages. --kmsg-error on checkpoint failure, report on stderr any kernel messages associated with the checkpoint request. --kmsg-warning report on stderr any kernel messages associated with the checkpoint request, regardless of success or failure. Messages generated in the absence of failure are considered to be warnings. Options in this group are mutually exclusive. If more than one is given then only the last will be honored. Note that --quiet suppresses all stderr output, including these messages. Misc Options: -t, --time SEC allow only SEC seconds for target to complete checkpoint (default: wait indefinitely).