RAISE(3)                                                                Linux Programmer's Manual                                                               RAISE(3)

NAME
       raise - send a signal to the caller

SYNOPSIS
       #include <signal.h>

       int raise(int sig);

DESCRIPTION
       The raise() function sends a signal to the calling process or thread.  In a single-threaded program it is equivalent to

           kill(getpid(), sig);

       In a multithreaded program it is equivalent to

           pthread_kill(pthread_self(), sig);

       If the signal causes a handler to be called, raise() will return only after the signal handler has returned.

RETURN VALUE
       raise() returns 0 on success, and nonzero for failure.

ATTRIBUTES
       For an explanation of the terms used in this section, see attributes(7).

       ┌──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │Interface                                                                                                                             │ Attribute     │ Value   │
       ├──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │raise()                                                                                                                               │ Thread safety │ MT-Safe │
       └──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

CONFORMING TO
       POSIX.1-2001, POSIX.1-2008, C89, C99.

NOTES
       Since  version  2.3.3,  glibc  implements  raise() by calling tgkill(2), if the kernel supports that system call.  Older glibc versions implemented raise() using
       kill(2).

SEE ALSO
       getpid(2), kill(2), sigaction(2), signal(2), pthread_kill(3), signal(7)

GNU                                                                            2021-03-22                                                                       RAISE(3)