unix: add PidfdOpen and PidfdGetfd
Add wrappers for the pidfd_open and pidfd_getfd sycalls, available since 5.3.
PIDFD_NONBLOCK is defined manually since mkerrors.sh doesn't handle including
linux/pidfd.h well.
See https://man7.org/linux/man-pages/man2/pidfd_open.2.html
Change-Id: I68dfb52f6a7a44b7f3324a8379860a1bb765e71b
Reviewed-on: https://go-review.googlesource.com/c/sys/+/347332
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
diff --git a/unix/linux/types.go b/unix/linux/types.go
index 7d76e5c..515e3b6 100644
--- a/unix/linux/types.go
+++ b/unix/linux/types.go
@@ -3829,3 +3829,9 @@
const (
LANDLOCK_RULE_PATH_BENEATH = C.LANDLOCK_RULE_PATH_BENEATH
)
+
+// pidfd flags.
+
+const (
+ PIDFD_NONBLOCK = C.O_NONBLOCK
+)
diff --git a/unix/syscall_linux.go b/unix/syscall_linux.go
index df8628e..b90214d 100644
--- a/unix/syscall_linux.go
+++ b/unix/syscall_linux.go
@@ -2288,6 +2288,9 @@
//sys ProcessVMReadv(pid int, localIov []Iovec, remoteIov []RemoteIovec, flags uint) (n int, err error) = SYS_PROCESS_VM_READV
//sys ProcessVMWritev(pid int, localIov []Iovec, remoteIov []RemoteIovec, flags uint) (n int, err error) = SYS_PROCESS_VM_WRITEV
+//sys PidfdOpen(pid int, flags int) (fd int, err error) = SYS_PIDFD_OPEN
+//sys PidfdGetfd(pidfd int, targetfd int, flags int) (fd int, err error) = SYS_PIDFD_GETFD
+
/*
* Unimplemented
*/
diff --git a/unix/zsyscall_linux.go b/unix/zsyscall_linux.go
index 2dbe3da..f98d2e3 100644
--- a/unix/zsyscall_linux.go
+++ b/unix/zsyscall_linux.go
@@ -1945,6 +1945,28 @@
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+func PidfdOpen(pid int, flags int) (fd int, err error) {
+ r0, _, e1 := Syscall(SYS_PIDFD_OPEN, uintptr(pid), uintptr(flags), 0)
+ fd = int(r0)
+ if e1 != 0 {
+ err = errnoErr(e1)
+ }
+ return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func PidfdGetfd(pidfd int, targetfd int, flags int) (fd int, err error) {
+ r0, _, e1 := Syscall(SYS_PIDFD_GETFD, uintptr(pidfd), uintptr(targetfd), uintptr(flags))
+ fd = int(r0)
+ if e1 != 0 {
+ err = errnoErr(e1)
+ }
+ return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
func pipe2(p *[2]_C_int, flags int) (err error) {
_, _, e1 := RawSyscall(SYS_PIPE2, uintptr(unsafe.Pointer(p)), uintptr(flags), 0)
if e1 != 0 {
diff --git a/unix/ztypes_linux_386.go b/unix/ztypes_linux_386.go
index 72f2e96..3219ade 100644
--- a/unix/ztypes_linux_386.go
+++ b/unix/ztypes_linux_386.go
@@ -635,3 +635,7 @@
PPS_GETCAP = 0x800470a3
PPS_FETCH = 0xc00470a4
)
+
+const (
+ PIDFD_NONBLOCK = 0x800
+)
diff --git a/unix/ztypes_linux_amd64.go b/unix/ztypes_linux_amd64.go
index d5f018d..16acd3b 100644
--- a/unix/ztypes_linux_amd64.go
+++ b/unix/ztypes_linux_amd64.go
@@ -653,3 +653,7 @@
PPS_GETCAP = 0x800870a3
PPS_FETCH = 0xc00870a4
)
+
+const (
+ PIDFD_NONBLOCK = 0x800
+)
diff --git a/unix/ztypes_linux_arm.go b/unix/ztypes_linux_arm.go
index 675446d..c4982a2 100644
--- a/unix/ztypes_linux_arm.go
+++ b/unix/ztypes_linux_arm.go
@@ -630,3 +630,7 @@
PPS_GETCAP = 0x800470a3
PPS_FETCH = 0xc00470a4
)
+
+const (
+ PIDFD_NONBLOCK = 0x800
+)
diff --git a/unix/ztypes_linux_arm64.go b/unix/ztypes_linux_arm64.go
index 711d071..98bb8a4 100644
--- a/unix/ztypes_linux_arm64.go
+++ b/unix/ztypes_linux_arm64.go
@@ -632,3 +632,7 @@
PPS_GETCAP = 0x800870a3
PPS_FETCH = 0xc00870a4
)
+
+const (
+ PIDFD_NONBLOCK = 0x800
+)
diff --git a/unix/ztypes_linux_mips.go b/unix/ztypes_linux_mips.go
index c1131c7..d5bfc35 100644
--- a/unix/ztypes_linux_mips.go
+++ b/unix/ztypes_linux_mips.go
@@ -636,3 +636,7 @@
PPS_GETCAP = 0x400470a3
PPS_FETCH = 0xc00470a4
)
+
+const (
+ PIDFD_NONBLOCK = 0x80
+)
diff --git a/unix/ztypes_linux_mips64.go b/unix/ztypes_linux_mips64.go
index 91d5574..b52c568 100644
--- a/unix/ztypes_linux_mips64.go
+++ b/unix/ztypes_linux_mips64.go
@@ -635,3 +635,7 @@
PPS_GETCAP = 0x400870a3
PPS_FETCH = 0xc00870a4
)
+
+const (
+ PIDFD_NONBLOCK = 0x80
+)
diff --git a/unix/ztypes_linux_mips64le.go b/unix/ztypes_linux_mips64le.go
index 5d72149..a340b84 100644
--- a/unix/ztypes_linux_mips64le.go
+++ b/unix/ztypes_linux_mips64le.go
@@ -635,3 +635,7 @@
PPS_GETCAP = 0x400870a3
PPS_FETCH = 0xc00870a4
)
+
+const (
+ PIDFD_NONBLOCK = 0x80
+)
diff --git a/unix/ztypes_linux_mipsle.go b/unix/ztypes_linux_mipsle.go
index a5addd0..b43d8e2 100644
--- a/unix/ztypes_linux_mipsle.go
+++ b/unix/ztypes_linux_mipsle.go
@@ -636,3 +636,7 @@
PPS_GETCAP = 0x400470a3
PPS_FETCH = 0xc00470a4
)
+
+const (
+ PIDFD_NONBLOCK = 0x80
+)
diff --git a/unix/ztypes_linux_ppc.go b/unix/ztypes_linux_ppc.go
index bb6b03d..efd7313 100644
--- a/unix/ztypes_linux_ppc.go
+++ b/unix/ztypes_linux_ppc.go
@@ -642,3 +642,7 @@
PPS_GETCAP = 0x400470a3
PPS_FETCH = 0xc00470a4
)
+
+const (
+ PIDFD_NONBLOCK = 0x800
+)
diff --git a/unix/ztypes_linux_ppc64.go b/unix/ztypes_linux_ppc64.go
index 7637243..22cedda 100644
--- a/unix/ztypes_linux_ppc64.go
+++ b/unix/ztypes_linux_ppc64.go
@@ -642,3 +642,7 @@
PPS_GETCAP = 0x400870a3
PPS_FETCH = 0xc00870a4
)
+
+const (
+ PIDFD_NONBLOCK = 0x800
+)
diff --git a/unix/ztypes_linux_ppc64le.go b/unix/ztypes_linux_ppc64le.go
index a1a28e5..452a76d 100644
--- a/unix/ztypes_linux_ppc64le.go
+++ b/unix/ztypes_linux_ppc64le.go
@@ -642,3 +642,7 @@
PPS_GETCAP = 0x400870a3
PPS_FETCH = 0xc00870a4
)
+
+const (
+ PIDFD_NONBLOCK = 0x800
+)
diff --git a/unix/ztypes_linux_riscv64.go b/unix/ztypes_linux_riscv64.go
index e0a8a13..96c667d 100644
--- a/unix/ztypes_linux_riscv64.go
+++ b/unix/ztypes_linux_riscv64.go
@@ -660,3 +660,7 @@
PPS_GETCAP = 0x800870a3
PPS_FETCH = 0xc00870a4
)
+
+const (
+ PIDFD_NONBLOCK = 0x800
+)
diff --git a/unix/ztypes_linux_s390x.go b/unix/ztypes_linux_s390x.go
index 21d6e56..af04ee1 100644
--- a/unix/ztypes_linux_s390x.go
+++ b/unix/ztypes_linux_s390x.go
@@ -656,3 +656,7 @@
PPS_GETCAP = 0x800870a3
PPS_FETCH = 0xc00870a4
)
+
+const (
+ PIDFD_NONBLOCK = 0x800
+)
diff --git a/unix/ztypes_linux_sparc64.go b/unix/ztypes_linux_sparc64.go
index 0531e98..6f385cf 100644
--- a/unix/ztypes_linux_sparc64.go
+++ b/unix/ztypes_linux_sparc64.go
@@ -637,3 +637,7 @@
PPS_GETCAP = 0x400870a3
PPS_FETCH = 0xc00870a4
)
+
+const (
+ PIDFD_NONBLOCK = 0x4000
+)
