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os/signal: selective signal handling

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Restore package os/signal, with new API:
Notify replaces Incoming, allowing clients
to ask for certain signals only.  Also, signals
go to everyone who asks, not just one client.

This could plausibly move into package os now
that there are no magic side effects as a result
of the import.

Update runtime for new API: move common Unix
signal handling code into signal_unix.c.
(It's so easy to do this now that we don't have
to edit Makefiles!)

Tested on darwin,linux 386,amd64.

Fixes #1266.

R=r, dsymonds, bradfitz, iant, borman
CC=golang-dev
https://golang.org/cl/3749041
This commit is contained in:
Russ Cox 2012-02-13 13:52:37 -05:00
parent cdd7e02583
commit 35586f718c
61 changed files with 1216 additions and 1266 deletions
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6
src/pkg/os/exec_unix.go
View file

@ -57,7 +57,11 @@ func (p *Process) Signal(sig Signal) error {
if p.done {
return errors.New("os: process already finished")
}
if e := syscall.Kill(p.Pid, int(sig.(UnixSignal))); e != nil {
s, ok := sig.(syscall.Signal)
if !ok {
return errors.New("os: unsupported signal type")
}
if e := syscall.Kill(p.Pid, s); e != nil {
return e
}
return nil