tkill(2) System Calls Manual tkill(2) tkill, tgkill - (libc -lc) #include /* Definition of SIG* constants */ #include /* Definition of SYS_* constants */ #include [[deprecated]] int syscall(SYS_tkill, pid_t tid, int sig); #include int tgkill(pid_t tgid, pid_t tid, int sig); : glibc tkill() syscall(2). tgkill() sig tid tgid. ( kill(2) ( ) .) tkill() tgkill(). . . . . -1 errno . EAGAIN RLIMIT_SIGPENDING sig . EAGAIN sig . EINVAL . EPERM . kill(2). ESRCH ( ). . tkill() 2.4.19 / 2.5.4. tgkill() 2.5.75 glibc 2.30. CLONE_THREAD clone(2) . clone(2), gettid(2), kill(2), rt_sigqueueinfo(2) 3 . . : . 6.18 8 2026 tkill(2)