os, syscall: use wait6 to avoid wait/kill race on netbsd

Follow CL 23967 and CL 24021 which did the same on linux and freebsd,
respectively.

Updates #13987
Updates #16028

Change-Id: I95b13d8ddde4cea1ef4fb7d655f1ad1a219d13aa
Reviewed-on: https://go-review.googlesource.com/c/go/+/315281
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

8 files changed, 8 insertions, 0 deletions

diff --git a/src/syscall/zerrors_netbsd_386.go b/src/syscall/zerrors_netbsd_386.go
index 6a58946a4a..934e9ef073 100644
--- a/src/syscall/zerrors_netbsd_386.go
+++ b/src/syscall/zerrors_netbsd_386.go
@@ -1427,6 +1427,7 @@ const (
 	WALTSIG                           = 0x4
 	WCLONE                            = 0x4
 	WCOREFLAG                         = 0x80
+	WEXITED                           = 0x20
 	WNOHANG                           = 0x1
 	WNOWAIT                           = 0x10000
 	WNOZOMBIE                         = 0x20000
diff --git a/src/syscall/zerrors_netbsd_amd64.go b/src/syscall/zerrors_netbsd_amd64.go
index f5c5c2f49c..0f5ad61a9f 100644
--- a/src/syscall/zerrors_netbsd_amd64.go
+++ b/src/syscall/zerrors_netbsd_amd64.go
@@ -1417,6 +1417,7 @@ const (
 	WALTSIG                           = 0x4
 	WCLONE                            = 0x4
 	WCOREFLAG                         = 0x80
+	WEXITED                           = 0x20
 	WNOHANG                           = 0x1
 	WNOWAIT                           = 0x10000
 	WNOZOMBIE                         = 0x20000
diff --git a/src/syscall/zerrors_netbsd_arm.go b/src/syscall/zerrors_netbsd_arm.go
index c9d4579b41..9d8678750d 100644
--- a/src/syscall/zerrors_netbsd_arm.go
+++ b/src/syscall/zerrors_netbsd_arm.go
@@ -1403,6 +1403,7 @@ const (
 	WALTSIG                           = 0x4
 	WCLONE                            = 0x4
 	WCOREFLAG                         = 0x80
+	WEXITED                           = 0x20
 	WNOHANG                           = 0x1
 	WNOWAIT                           = 0x10000
 	WNOZOMBIE                         = 0x20000
diff --git a/src/syscall/zerrors_netbsd_arm64.go b/src/syscall/zerrors_netbsd_arm64.go
index e35bff7f3e..7adb72f7ed 100644
--- a/src/syscall/zerrors_netbsd_arm64.go
+++ b/src/syscall/zerrors_netbsd_arm64.go
@@ -1417,6 +1417,7 @@ const (
 	WALTSIG                           = 0x4
 	WCLONE                            = 0x4
 	WCOREFLAG                         = 0x80
+	WEXITED                           = 0x20
 	WNOHANG                           = 0x1
 	WNOWAIT                           = 0x10000
 	WNOZOMBIE                         = 0x20000
diff --git a/src/syscall/zsysnum_netbsd_386.go b/src/syscall/zsysnum_netbsd_386.go
index 4ff8d80341..fd0c329951 100644
--- a/src/syscall/zsysnum_netbsd_386.go
+++ b/src/syscall/zsysnum_netbsd_386.go
@@ -271,4 +271,5 @@ const (
 	SYS_POSIX_SPAWN          = 474 // { int|sys||posix_spawn(pid_t *pid, const char *path, const struct posix_spawn_file_actions *file_actions, const struct posix_spawnattr *attrp, char *const *argv, char *const *envp); }
 	SYS_RECVMMSG             = 475 // { int|sys||recvmmsg(int s, struct mmsghdr *mmsg, unsigned int vlen, unsigned int flags, struct timespec *timeout); }
 	SYS_SENDMMSG             = 476 // { int|sys||sendmmsg(int s, struct mmsghdr *mmsg, unsigned int vlen, unsigned int flags); }
+	SYS_WAIT6                = 481 // { int|sys||wait6(idtype_t idtype, id_t id, int *status, int options, struct wrusage *wru, siginfo_t *info); }
 )
diff --git a/src/syscall/zsysnum_netbsd_amd64.go b/src/syscall/zsysnum_netbsd_amd64.go
index 929da07604..03f2cd3bd3 100644
--- a/src/syscall/zsysnum_netbsd_amd64.go
+++ b/src/syscall/zsysnum_netbsd_amd64.go
@@ -271,4 +271,5 @@ const (
 	SYS_POSIX_SPAWN          = 474 // { int|sys||posix_spawn(pid_t *pid, const char *path, const struct posix_spawn_file_actions *file_actions, const struct posix_spawnattr *attrp, char *const *argv, char *const *envp); }
 	SYS_RECVMMSG             = 475 // { int|sys||recvmmsg(int s, struct mmsghdr *mmsg, unsigned int vlen, unsigned int flags, struct timespec *timeout); }
 	SYS_SENDMMSG             = 476 // { int|sys||sendmmsg(int s, struct mmsghdr *mmsg, unsigned int vlen, unsigned int flags); }
+	SYS_WAIT6                = 481 // { int|sys||wait6(idtype_t idtype, id_t id, int *status, int options, struct wrusage *wru, siginfo_t *info); }
 )
diff --git a/src/syscall/zsysnum_netbsd_arm.go b/src/syscall/zsysnum_netbsd_arm.go
index 998238518b..7b356e7102 100644
--- a/src/syscall/zsysnum_netbsd_arm.go
+++ b/src/syscall/zsysnum_netbsd_arm.go
@@ -271,4 +271,5 @@ const (
 	SYS_POSIX_SPAWN          = 474 // { int|sys||posix_spawn(pid_t *pid, const char *path, const struct posix_spawn_file_actions *file_actions, const struct posix_spawnattr *attrp, char *const *argv, char *const *envp); }
 	SYS_RECVMMSG             = 475 // { int|sys||recvmmsg(int s, struct mmsghdr *mmsg, unsigned int vlen, unsigned int flags, struct timespec *timeout); }
 	SYS_SENDMMSG             = 476 // { int|sys||sendmmsg(int s, struct mmsghdr *mmsg, unsigned int vlen, unsigned int flags); }
+	SYS_WAIT6                = 481 // { int|sys||wait6(idtype_t idtype, id_t id, int *status, int options, struct wrusage *wru, siginfo_t *info); }
 )
diff --git a/src/syscall/zsysnum_netbsd_arm64.go b/src/syscall/zsysnum_netbsd_arm64.go
index b3f5034390..3f57ec4d89 100644
--- a/src/syscall/zsysnum_netbsd_arm64.go
+++ b/src/syscall/zsysnum_netbsd_arm64.go
@@ -271,4 +271,5 @@ const (
 	SYS_POSIX_SPAWN          = 474 // { int|sys||posix_spawn(pid_t *pid, const char *path, const struct posix_spawn_file_actions *file_actions, const struct posix_spawnattr *attrp, char *const *argv, char *const *envp); }
 	SYS_RECVMMSG             = 475 // { int|sys||recvmmsg(int s, struct mmsghdr *mmsg, unsigned int vlen, unsigned int flags, struct timespec *timeout); }
 	SYS_SENDMMSG             = 476 // { int|sys||sendmmsg(int s, struct mmsghdr *mmsg, unsigned int vlen, unsigned int flags); }
+	SYS_WAIT6                = 481 // { int|sys||wait6(idtype_t idtype, id_t id, int *status, int options, struct wrusage *wru, siginfo_t *info); }
 )