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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | VERSIONS | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
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pthread_sigqueue(3) Library Functions Manual pthread_sigqueue(3)
pthread_sigqueue - queue a signal and data to a thread
POSIX threads library (libpthread, -lpthread)
#include <signal.h>
#include <pthread.h>
int pthread_sigqueue(pthread_t thread, int sig,
const union sigval value);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
pthread_sigqueue():
_GNU_SOURCE
The pthread_sigqueue() function performs a similar task to
sigqueue(3), but, rather than sending a signal to a process, it
sends a signal to a thread in the same process as the calling
thread.
The thread argument is the ID of a thread in the same process as
the caller. The sig argument specifies the signal to be sent.
The value argument specifies data to accompany the signal; see
sigqueue(3) for details.
On success, pthread_sigqueue() returns 0; on error, it returns an
error number.
EAGAIN The limit of signals which may be queued has been reached.
(See signal(7) for further information.)
EINVAL sig was invalid.
ENOSYS pthread_sigqueue() is not supported on this system.
ESRCH thread is not valid.
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│ Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│ pthread_sigqueue() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
The glibc implementation of pthread_sigqueue() gives an error
(EINVAL) on attempts to send either of the real-time signals used
internally by the NPTL threading implementation. See nptl(7) for
details.
GNU.
glibc 2.11.
rt_tgsigqueueinfo(2), sigaction(2), pthread_sigmask(3),
sigqueue(3), sigwait(3), pthreads(7), signal(7)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.15.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2025-08-11. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
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man-pages@man7.org
Linux man-pages 6.15 2025-05-17 pthread_sigqueue(3)
Pages that refer to this page: clone(2), rt_sigqueueinfo(2), sigevent(3type), sigqueue(3), nptl(7), pthreads(7), signal(7)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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