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→Dumping a simplest process in a new session without controll terminal
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+ +
= Dumping a simplest process in a new session without controll terminal =
= Dumping a simplest process in a new session without controll terminal =
+At first let's dump/restore a trivial process without external dependences.
+* For that we can create a shell script, which will report date and time every second. For removing dependences on a current terminal it will be executed in a new session and output will be redirected in a file.
$ cat > test.sh <<-EOF
$ cat > test.sh <<-EOF
#!/bin/sh
#!/bin/sh
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[2]+ Done setsid ./test.sh < /dev/null &>test.log
[2]+ Done setsid ./test.sh < /dev/null &>test.log
−* Get pid of the test process:
$ ps -C test.sh
$ ps -C test.sh
PID TTY TIME CMD
PID TTY TIME CMD
2221 ? 00:00:00 test.sh
2221 ? 00:00:00 test.sh
+* Dump the test process.
$ ~/crtools/crtools dump -t 2221 -vvv -o dump.log && echo OK
$ ~/crtools/crtools dump -t 2221 -vvv -o dump.log && echo OK
OK
OK
+* The state of the processes are saved in a few files:
$ ls
$ ls
core-2221.img eventpoll-tfd.img filelocks-2221.img inotify.img netlinksk.img pipes.img sigacts-2424.img test.log
core-2221.img eventpoll-tfd.img filelocks-2221.img inotify.img netlinksk.img pipes.img sigacts-2424.img test.log
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eventfd.img fifo-data.img ids-2424.img mm-2221.img pages-2.img rlimit-2424.img signal-s-2424.img vmas-2221.img
eventfd.img fifo-data.img ids-2424.img mm-2221.img pages-2.img rlimit-2424.img signal-s-2424.img vmas-2221.img
eventpoll.img fifo.img inetsk.img mm-2424.img pipes-data.img sigacts-2221.img sk-queues.img vmas-2424.img
eventpoll.img fifo.img inetsk.img mm-2424.img pipes-data.img sigacts-2221.img sk-queues.img vmas-2424.img
−* Restore the test process.
$ ~/crtools/crtools restore -d -t 2221 -vvv -o restore.log && echo OK
$ ~/crtools/crtools restore -d -t 2221 -vvv -o restore.log && echo OK
OK
OK