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= Dumping a simplest process in a new session without controll terminal =
$ cat > test.sh <<-EOF
$ cat > test.sh <<-EOF
#!/bin/sh
#!/bin/sh
[2] 2220
[2] 2220
[2]+ Done setsid ./test.sh < /dev/null &>test.log
[2]+ Done setsid ./test.sh < /dev/null &>test.log
$ ps -C test.sh
$ ps -C test.sh
OK
OK
= Dumping one shell job =
Now let's try to dump a program, which is using a terminal. For that we need to execute our test script or another program (e.g. "top") from a terminal without redirections. It will report date and time every second.
$ ./test.sh
$ ./test.sh
$ ps -C test.sh
$ ps -C test.sh
2621 pts/1 00:00:00 test.sh
2621 pts/1 00:00:00 test.sh
Currently crtools doesn't support a stopped task, so "crtools dump" must be executed from another terminal.
$ ~/crtools/crtools dump -t 2621
$ ~/crtools/crtools dump -t 2621
(00.012929) Error (tty.c:1022): tty: Found dangling tty with sid 940 pgid 2621 (pts) on peer fd 0. Consider using --shell-job option.
(00.012929) Error (tty.c:1022): tty: Found dangling tty with sid 940 pgid 2621 (pts) on peer fd 0. Consider using --shell-job option.
(00.013111) Error (cr-dump.c:1636): Dumping FAILED.
(00.013111) Error (cr-dump.c:1636): Dumping FAILED.
crtools asks to set the option --shell-job, because we try to dump only a part of session and a slave point of a tty pair. It's a common rule to ask a user, if only a part of something is dumped.
$ ~/crtools/crtools dump -vvvv -o dump.log -t 2621 --shell-job && echo Ok
$ ~/crtools/crtools dump -vvvv -o dump.log -t 2621 --shell-job && echo Ok
Ok
Ok