Date: Wed, 14 Jul 2010 15:49:05 +0400 From: Andrey Zonov <andrey.zonov@gmail.com> To: freebsd-hackers@freebsd.org Subject: Re: How change process flags from userland? Message-ID: <AANLkTik5-O1UDrunEps0x5TAxtpnLYvAzob9Xw_nguxd@mail.gmail.com> In-Reply-To: <4C2AE37C.5060000@gmail.com> References: <4C2AE37C.5060000@gmail.com>
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Hi,
I resolve this problem (thanks Julian Elischer for his thoughts):
===
int fd;
int cnt;
off_t off;
void *p;
kvm_t *kd;
struct kinfo_proc *kip;
struct proc *p_mmap;
kd = kvm_open(NULL, _PATH_MEM, NULL, O_RDONLY, NULL);
kip = kvm_getprocs(kd, KERN_PROC_PID, pid, &cnt);
fd = open(_PATH_KMEM, O_RDWR, 0);
off = (off_t)((uintptr_t)kip->ki_paddr);
p = mmap(0, sizeof(struct proc), PROT_READ | PROT_WRITE,
MAP_SHARED, fd, off);
p_mmap = (struct proc *)p;
p_mmap->p_flag |= P_PROTECTED;
...
===
I wrote daemon [1] that set P_PROTECTED flag for applications. May be
it useful for someone.
[1] http://zonov.pp.ru/pprotectd/pprotectd.tbz
--
Andrey Zonov
2010/6/30 Andrey Zonov <andrey.zonov@gmail.com>:
> Hi,
>
> I want to set P_PROTECTED flag for some daemons after it start, without
> patching application and kernel.
> It possible?
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