ptrace'ing of parent process
- by osgx
Hello
Can child process use the ptrace system call to trace its parent?
Os is linux 2.6
Thanks.
upd1:
I want to trace process1 from "itself". It is impossible, so I do fork and try to do ptrace(process1_pid, PTRACE_ATTACH) from child process. But I can't, there is a strange error, like kernel prohibits child from tracing their parent processes
UPD2: such tracing can be prohibited by security policies. Which polices do this? Where is the checking code in the kernel?
UPD3: on my embedded linux I have no errors with PEEKDATA, but not with GETREGS:
child: getregs parent: -1
errno is 1, strerror is Operation not permitted
errno = EPERM
