path: root/include/fcntl.h
diff options
authorSzabolcs Nagy <>2014-10-01 22:25:40 +0200
committerRich Felker <>2014-10-08 11:39:28 -0400
commita3763d64e0d65ed1902b36c521c57cd252b9c3be (patch)
tree2b5d6e63779baaa524829e065d57ded57c4990ce /include/fcntl.h
parenta0c90b9773bd9b5b6faa7a657e22794c1e643989 (diff)
add new linux file sealing api to fcntl.h
new in linux v3.17 commit 40e041a2c858b3caefc757e26cb85bfceae5062b sealing allows some operations to be blocked on a file which makes file access safer when fds are shared between processes (only supported for shared mem fds currently) flags: F_SEAL_SEAL prevents further sealing F_SEAL_SHRINK prevents file from shrinking F_SEAL_GROW prevents file from growing F_SEAL_WRITE prevents writes fcntl commands: F_GET_SEALS get the current seal flags F_ADD_SEALS add new seal flags
Diffstat (limited to 'include/fcntl.h')
1 files changed, 7 insertions, 0 deletions
diff --git a/include/fcntl.h b/include/fcntl.h
index ff9fcb92..f5bfebc8 100644
--- a/include/fcntl.h
+++ b/include/fcntl.h
@@ -121,6 +121,13 @@ int posix_fallocate(int, off_t, off_t);
#define F_CANCELLK 1029
#define F_SETPIPE_SZ 1031
#define F_GETPIPE_SZ 1032
+#define F_ADD_SEALS 1033
+#define F_GET_SEALS 1034
+#define F_SEAL_SEAL 0x0001
+#define F_SEAL_SHRINK 0x0002
+#define F_SEAL_GROW 0x0004
+#define F_SEAL_WRITE 0x0008
#define DN_ACCESS 0x00000001
#define DN_MODIFY 0x00000002