|TKILL(2)||Linux Programmer's Manual||TKILL(2)|
#include <signal.h> /* Definition of SIG* constants */ #include <sys/syscall.h> /* Definition of SYS_* constants */ #include <unistd.h>
int syscall(SYS_tkill, pid_t tid, int sig);
int tgkill(pid_t tgid, pid_t tid, int sig);
Note: glibc provides no wrapper for tkill(), necessitating the use of syscall(2).
tkill() is an obsolete predecessor to tgkill(). It allows only the target thread ID to be specified, which may result in the wrong thread being signaled if a thread terminates and its thread ID is recycled. Avoid using this system call.
These are the raw system call interfaces, meant for internal thread library use.
- The RLIMIT_SIGPENDING resource limit was reached and sig is a real-time signal.
- Insufficient kernel memory was available and sig is a real-time signal.
- An invalid thread ID, thread group ID, or signal was specified.
- Permission denied. For the required permissions, see kill(2).
- No process with the specified thread ID (and thread group ID) exists.
Library support for tgkill() was added to glibc in version 2.30.
Before glibc 2.30, there was also no wrapper function for tgkill().