On Thu, 2007-11-01 at 10:44 +0200, Andrei Nestor wrote:
> Salut,
>
> Cum pot sa aflu si eu dintr-un program C daca un anumit proces (cunosc
> PID-ul) mai exista sau nu? Thanks.
Qoutes from `man 2 kill`:
Qoute1:
=======
SYNOPSIS
#include <sys/types.h>
#include <signal.h>
int kill(pid_t pid, int sig);
=======
Qoute2:
=======
RETURN VALUE
On success (at least one signal was sent), zero is returned. On
error, -1 is returned, and errno is set appropriately.
ERRORS
EINVAL An invalid signal was specified.
EPERM The process does not have permission to send the signal
to any of the target processes.
ESRCH The pid or process group does not exist. Note that an
existing process might be a zombie, a process which already
committed termination, but has not yet been wait()ed for.
========
Qoute3:
========
If sig is 0, then no signal is sent, but error checking is
still performed.
========
Drept concluzie: kill(pid, 0) si verifici return code + errno.
NB: Trebuie ca in programul tau C sa ai aceleasi privilegii ca si
procesul urmarit.
--
Spami.
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