raise(3)                   Library Functions Manual                   raise(3)

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
       C11, POSIX.1-2008.

HISTORY
       POSIX.1-2001, C89.

       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)

Linux man-pages 6.7               2023-10-31                          raise(3)