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unix: fix Signalfd function signature on linux

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The kernel raw syscall takes an additional parameter specifying
the size of the Sigset_t parameter, returns a file descriptor and sets errno.

Add a uintptr maxSize parameter, adjust the return to be (newfd int, err error).
Add the _NSIG #define and a wrapper to call with maxSize set to _C__NSIG/8 as done
in glibc/musl.

Change-Id: I277db0aab5c12364533c26ea800b7f394ec83ae4
Reviewed-on: https://go-review.googlesource.com/c/sys/+/178858
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Yuval Pavel Zholkover
2019-05-28 01:25:30 +00:00
committed by Ian Lance Taylor
parent 9cd6430ef9
commit adf421d2ca
28 changed files with 111 additions and 27 deletions
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unix/syscall_linux.go
+5 -1
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@@ -1537,9 +1537,13 @@ func Setgid(uid int) (err error) {
return EOPNOTSUPP
}
func Signalfd(fd int, sigmask *Sigset_t, flags int) (newfd int, err error) {
return signalfd(fd, sigmask, _C__NSIG/8, flags)
}
//sys Setpriority(which int, who int, prio int) (err error)
//sys Setxattr(path string, attr string, data []byte, flags int) (err error)
//sys Signalfd(fd int, mask *Sigset_t, flags int) = SYS_SIGNALFD4
//sys signalfd(fd int, sigmask *Sigset_t, maskSize uintptr, flags int) (newfd int, err error) = SYS_SIGNALFD4
//sys Statx(dirfd int, path string, flags int, mask int, stat *Statx_t) (err error)
//sys Sync()
//sys Syncfs(fd int) (err error)