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
 | 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)

COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.