mirror of https://github.com/mkerrisk/man-pages
sigwaitinfo.2: Some wording clarifications
Mainly rewording things like "is delivered" to "becomes pending", which is more accurate terminology. Reported-by: Daniel Zingaro <daniel.zingaro@utoronto.ca> Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
parent
4e9ee22571
commit
bf1298c9e5
|
@ -20,7 +20,7 @@
|
|||
.\" Formatted or processed versions of this manual, if unaccompanied by
|
||||
.\" the source, must acknowledge the copyright and authors of this work.
|
||||
.\"
|
||||
.TH SIGWAITINFO 2 2012-05-02 "Linux" "Linux Programmer's Manual"
|
||||
.TH SIGWAITINFO 2 2012-07-21 "Linux" "Linux Programmer's Manual"
|
||||
.SH NAME
|
||||
sigwaitinfo, sigtimedwait \- synchronously wait for queued signals
|
||||
.SH SYNOPSIS
|
||||
|
@ -45,28 +45,30 @@ _POSIX_C_SOURCE\ >=\ 199309L
|
|||
.BR sigwaitinfo ()
|
||||
suspends execution of the calling thread until one of the signals in
|
||||
.I set
|
||||
is delivered.
|
||||
is pending
|
||||
(If one of the signals in
|
||||
.I set
|
||||
is already pending for the calling thread,
|
||||
.BR sigwaitinfo ()
|
||||
will return immediately with information about that signal.)
|
||||
will return immediately.)
|
||||
|
||||
.BR sigwaitinfo ()
|
||||
removes the delivered signal from the set of pending
|
||||
removes the signal from the set of pending
|
||||
signals and returns the signal number as its function result.
|
||||
If the
|
||||
.I info
|
||||
argument is not NULL,
|
||||
then it returns a structure of type
|
||||
then the buffer that it points to is used to return a structure of type
|
||||
.I siginfo_t
|
||||
(see
|
||||
.BR sigaction (2))
|
||||
containing information about the signal.
|
||||
.PP
|
||||
Signals returned via
|
||||
If multiple signals in
|
||||
.I set
|
||||
are pending for the caller, the signal that is retrieved by
|
||||
.BR sigwaitinfo ()
|
||||
are delivered in the usual order; see
|
||||
is determined according to the usual ordering rules; see
|
||||
.BR signal (7)
|
||||
for further details.
|
||||
.PP
|
||||
|
@ -112,7 +114,7 @@ set to indicate the error.
|
|||
.B EAGAIN
|
||||
No signal in
|
||||
.I set
|
||||
was delivered within the
|
||||
was became pending within the
|
||||
.I timeout
|
||||
period specified to
|
||||
.BR sigtimedwait ().
|
||||
|
@ -134,14 +136,15 @@ In normal usage, the calling program blocks the signals in
|
|||
via a prior call to
|
||||
.BR sigprocmask (2)
|
||||
(so that the default disposition for these signals does not occur if they
|
||||
are delivered between successive calls to
|
||||
become pending between successive calls to
|
||||
.BR sigwaitinfo ()
|
||||
or
|
||||
.BR sigtimedwait ())
|
||||
and does not establish handlers for these signals.
|
||||
In a multithreaded program,
|
||||
the signal should be blocked in all threads to prevent
|
||||
the signal being delivered to a thread other than the one calling
|
||||
the signal should be blocked in all threads, in order to prevent
|
||||
the signal being treated according to its default disposition in
|
||||
a thread other than the one calling
|
||||
.BR sigwaitinfo ()
|
||||
or
|
||||
.BR sigtimedwait ()).
|
||||
|
@ -163,7 +166,7 @@ waiting for the same signal(s) in
|
|||
or
|
||||
.BR sigtimedwait (),
|
||||
then exactly one of the threads will actually receive the
|
||||
signal if it is delivered to the process as a whole;
|
||||
signal if it becomes pending for the process as a whole;
|
||||
which of the threads receives the signal is indeterminate.
|
||||
|
||||
POSIX leaves the meaning of a NULL value for the
|
||||
|
|
Loading…
Reference in New Issue