mirror of https://github.com/mkerrisk/man-pages
89 lines
2.5 KiB
Groff
89 lines
2.5 KiB
Groff
.\" Copyright (c) 1993 by Thomas Koenig (ig25@rz.uni-karlsruhe.de)
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.\" and Copyright (C) 2008 Michael Kerrisk <mtk.manpages@gmail.com>
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.\"
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.\" %%%LICENSE_START(VERBATIM)
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.\" Permission is granted to make and distribute verbatim copies of this
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.\" manual provided the copyright notice and this permission notice are
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.\" preserved on all copies.
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.\"
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.\" Permission is granted to copy and distribute modified versions of this
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.\" manual under the conditions for verbatim copying, provided that the
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.\" entire resulting derived work is distributed under the terms of a
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.\" permission notice identical to this one.
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.\"
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.\" Since the Linux kernel and libraries are constantly changing, this
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.\" manual page may be incorrect or out-of-date. The author(s) assume no
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.\" responsibility for errors or omissions, or for damages resulting from
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.\" the use of the information contained herein. The author(s) may not
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.\" have taken the same level of care in the production of this manual,
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.\" which is licensed free of charge, as they might when working
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.\" professionally.
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.\"
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.\" Formatted or processed versions of this manual, if unaccompanied by
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.\" the source, must acknowledge the copyright and authors of this work.
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.\" %%%LICENSE_END
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.\"
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.\" Modified Sat Jul 24 18:40:56 1993 by Rik Faith (faith@cs.unc.edu)
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.\" Modified 1995 by Mike Battersby (mib@deakin.edu.au)
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.\"
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.TH RAISE 3 2014-03-10 "GNU" "Linux Programmer's Manual"
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.SH NAME
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raise \- send a signal to the caller
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.SH SYNOPSIS
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.nf
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.B #include <signal.h>
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.sp
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.BI "int raise(int " sig );
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.fi
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.SH DESCRIPTION
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The
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.BR raise ()
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function sends a signal to the calling process or thread.
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In a single-threaded program it is equivalent to
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.sp
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.in +4n
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.nf
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kill(getpid(), sig);
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.fi
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.in
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.PP
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In a multithreaded program it is equivalent to
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.sp
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.in +4n
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.nf
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pthread_kill(pthread_self(), sig);
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.fi
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.in
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.PP
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If the signal causes a handler to be called,
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.BR raise ()
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will return only after the signal handler has returned.
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.SH RETURN VALUE
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.BR raise ()
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returns 0 on success, and nonzero for failure.
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.SH ATTRIBUTES
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.SS Multithreading (see pthreads(7))
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The
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.BR raise ()
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function is thread-safe.
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.SH CONFORMING TO
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C89, C99, POSIX.1-2001.
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.SH NOTES
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Since version 2.3.3, glibc implements
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.BR raise ()
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by calling
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.BR tgkill (2),
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.\" 2.3.2 used the obsolete tkill(), if available.
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if the kernel supports that system call.
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Older glibc versions implemented
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.BR raise ()
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using
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.BR kill (2).
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.SH SEE ALSO
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.BR getpid (2),
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.BR kill (2),
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.BR sigaction (2),
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.BR signal (2),
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.BR pthread_kill (3),
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.BR signal (7)
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