NAME

       raise - send a signal to the caller

LIBRARY

       Standard C library (libc, -lc)

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 │
       └───────────────────────────────────────────────────────────────┴───────────────┴─────────┘

STANDARDS

       POSIX.1-2001, POSIX.1-2008, C99.

NOTES

       Since  glibc  2.3.3,  raise()  is implemented 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)