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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | STANDARDS | HISTORY | CAVEATS | SEE ALSO | COLOPHON |
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PR_SET_PDEATHSIG(2const) PR_SET_PDEATHSIG(2const)
PR_SET_PDEATHSIG - set the parent-death signal of the calling
process
Standard C library (libc, -lc)
#include <linux/prctl.h> /* Definition of PR_* constants */
#include <sys/prctl.h>
int prctl(PR_SET_PDEATHSIG, long sig);
Set the parent-death signal of the calling process to sig (either
a signal value in the range [1, NSIG - 1], or 0 to clear). This
is the signal that the calling process will get when its parent
dies.
The parent-death signal is sent upon subsequent termination of the
parent thread and also upon termination of each subreaper process
(see PR_SET_CHILD_SUBREAPER(2const)) to which the caller is
subsequently reparented. If the parent thread and all ancestor
subreapers have already terminated by the time of the
PR_SET_PDEATHSIG operation, then no parent-death signal is sent to
the caller.
The parent-death signal is process-directed (see signal(7)) and,
if the child installs a handler using the sigaction(2) SA_SIGINFO
flag, the si_pid field of the siginfo_t argument of the handler
contains the PID of the terminating parent process.
The parent-death signal setting is cleared for the child of a
fork(2). It is also (since Linux 2.4.36 / 2.6.23) cleared when
executing a set-user-ID or set-group-ID binary, or a binary that
has associated capabilities (see capabilities(7)); otherwise, this
value is preserved across execve(2). The parent-death signal
setting is also cleared upon changes to any of the following
thread credentials: effective user ID, effective group ID,
filesystem user ID, or filesystem group ID.
On success, 0 is returned. On error, -1 is returned, and errno is
set to indicate the error.
EINVAL sig is not a valid signal number.
Linux.
Linux 2.1.57.
The "parent" in this case is considered to be the thread that
created this process. In other words, the signal will be sent
when that thread terminates (via, for example, pthread_exit(3)),
rather than after all of the threads in the parent process
terminate.
prctl(2), PR_GET_PDEATHSIG(2const)
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-
to-date source for the page, or you have corrections or
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part of the original manual page), send a mail to
[email protected]
Linux man-pages 6.15 2025-05-17 PR_SET_PDEATHSIG(2const)
Pages that refer to this page: prctl(2), PR_GET_PDEATHSIG(2const)
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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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