Le 13 août 08 à 15:27, Kyle Sluder a écrit :
On Tue, Aug 12, 2008 at 10:14 PM, Steve Byan <[EMAIL PROTECTED]>
wrote:
Actually, the man-page is incomplete and doesn't tell you how to
read and
write another process's memory.
The manpage also fails to mention the undocumented PT_DENY_ATTACH flag
that applications can pass to force ptrace to fail to attach. Pro
Tools, for example, does this because the "programmers" who wrote it
spent twice as much time on the copy protection as on the actual
application.
man ptrace:
PTRACE(2) BSD System Calls Manual
PTRACE(2)
NAME
ptrace -- process tracing and debugging
...
PT_DENY_ATTACH
This request is the other operation used by the
traced process; it allows a process that is not currently being traced
to deny future traces by
its parent. All other arguments are ignored. If
the process is currently being traced, it will exit with the exit
status of ENOTSUP; other-
wise, it sets a flag that denies future traces.
An attempt by the parent to trace a process which has set this flag
will result in a segmenta-
tion violation in the parent.
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