Originální popis anglicky:
tkill, tgkill - send a signal to a single process
Návod, kniha: Linux Programmer's Manual
#include <sys/types.h>
#include <linux/unistd.h>
_syscall2(int, tkill, int, tid, int, sig)
int tkill(int tid, int sig);
_syscall3(int, tkill, int, tgid, int, tid, int, sig)
int tgkill(int tgid, int tid, int sig);
The
tkill system call is analogous to
kill(2), except when the
specified process is part of a thread group (created by specifying the
CLONE_THREAD flag in the call to clone). Since all the processes in a thread
group have the same PID, they cannot be individually signalled with
kill. With
tkill, however, one can address each process by its
unique TID.
The
tgkill call improves on
tkill by allowing the caller to
specify the thread group ID of the thread to be signalled, protecting against
TID reuse. If the tgid is specified as -1,
tgkill degenerates into
tkill.
These are the raw system call interfaces, meant for internal thread library use.
On success, zero is returned. On error, -1 is returned, and
errno is set
appropriately.
- EINVAL
- An invalid TID or signal was specified.
- EPERM
- Permission denied. For the required permissions, see
kill(2).
- ESRCH
- No process with the specified thread ID (and thread group
ID) exists.
tkill and
tgkill are Linux specific and should not be used in
programs that are intended to be portable.
tkill is supported since
Linux 2.4.19 / 2.5.4.
tgkill was added in Linux 2.5.75.
gettid(2),
kill(2)
