Implement F_GETOWN_EX and F_SETOWN_EX.

Some versions of glibc will convert F_GETOWN fcntl(2) calls into F_GETOWN_EX in
some cases.

PiperOrigin-RevId: 284089373

1 files changed, 28 insertions, 13 deletions

diff --git a/pkg/abi/linux/fcntl.go b/pkg/abi/linux/fcntl.go
index f78315ebf..6663a199c 100644
--- a/pkg/abi/linux/fcntl.go
+++ b/pkg/abi/linux/fcntl.go
@@ -16,15 +16,17 @@ package linux
 
 // Commands from linux/fcntl.h.
 const (
-	F_DUPFD         = 0x0
-	F_GETFD         = 0x1
-	F_SETFD         = 0x2
-	F_GETFL         = 0x3
-	F_SETFL         = 0x4
-	F_SETLK         = 0x6
-	F_SETLKW        = 0x7
-	F_SETOWN        = 0x8
-	F_GETOWN        = 0x9
+	F_DUPFD         = 0
+	F_GETFD         = 1
+	F_SETFD         = 2
+	F_GETFL         = 3
+	F_SETFL         = 4
+	F_SETLK         = 6
+	F_SETLKW        = 7
+	F_SETOWN        = 8
+	F_GETOWN        = 9
+	F_SETOWN_EX     = 15
+	F_GETOWN_EX     = 16
 	F_DUPFD_CLOEXEC = 1024 + 6
 	F_SETPIPE_SZ    = 1024 + 7
 	F_GETPIPE_SZ    = 1024 + 8
@@ -32,9 +34,9 @@ const (
 
 // Commands for F_SETLK.
 const (
-	F_RDLCK = 0x0
-	F_WRLCK = 0x1
-	F_UNLCK = 0x2
+	F_RDLCK = 0
+	F_WRLCK = 1
+	F_UNLCK = 2
 )
 
 // Flags for fcntl.
@@ -42,7 +44,7 @@ const (
 	FD_CLOEXEC = 00000001
 )
 
-// Lock structure for F_SETLK.
+// Flock is the lock structure for F_SETLK.
 type Flock struct {
 	Type   int16
 	Whence int16
@@ -52,3 +54,16 @@ type Flock struct {
 	Pid    int32
 	_      [4]byte
 }
+
+// Flags for F_SETOWN_EX and F_GETOWN_EX.
+const (
+	F_OWNER_TID  = 0
+	F_OWNER_PID  = 1
+	F_OWNER_PGRP = 2
+)
+
+// FOwnerEx is the owner structure for F_SETOWN_EX and F_GETOWN_EX.
+type FOwnerEx struct {
+	Type int32
+	PID  int32
+}