mirror/guile
mirror/guile
1
Fork 0
mirror of https://git.savannah.gnu.org/git/guile.git synced 2025-06-09 21:40:33 +02:00
Code Activity

(Signals): In sigaction, add SA_NOCLDSTOP, make it

Browse source 
clearer SA_RESTART is a variable.
This commit is contained in:
Kevin Ryde 2005-01-28 21:09:30 +00:00
parent 5bbc406b83
commit 91f5e9f7ec
1 changed files with 25 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

29
doc/ref/posix.texi
View file

@ -1740,10 +1740,31 @@ procedure has been specified, that procedure will run in the given
@var{thread}. When no thread has been given, the thread that made this
call to @code{sigaction} is used.
Flags can optionally be specified for the new handler (@code{SA_RESTART}
will always be added if it's available and the system is using
restartable system calls.) The return value is a pair with information
about the old handler as described above.
@var{flags} is a @code{logior} (@pxref{Bitwise Operations}) of the
following (where provided by the system), or @code{0} for none.
@defvar SA_NOCLDSTOP
By default, @code{SIGCHLD} is signalled when a child process stops
(ie.@: receives @code{SIGSTOP}), and when a child process terminates.
With the @code{SA_NOCLDSTOP} flag, @code{SIGCHLD} is only signalled
for termination, not stopping.
@code{SA_NOCLDSTOP} has no effect on signals other than
@code{SIGCHLD}.
@end defvar
@defvar SA_RESTART
If a signal occurs while in a system call, deliver the signal then
restart the system call (as opposed to returning an @code{EINTR} error
from that call).
Guile always enables this flag where available, no matter what
@var{flags} are specified. This avoids spurious error returns in low
level operations.
@end defvar
The return value is a pair with information about the old handler as
described above.
This interface does not provide access to the ``signal blocking''
facility. Maybe this is not needed, since the thread support may