I'm not 100% sure that Linux's O_PATH meets the POSIX requirements for
O_SEARCH, but it seems very close if not perfect. and old kernels
ignore it, so O_SEARCH will still work as desired as long as the
caller has read permissions to the directory.
#define O_DIRECTORY 040000
#define O_NOFOLLOW 0100000
#define O_CLOEXEC 02000000
#define O_DIRECTORY 040000
#define O_NOFOLLOW 0100000
#define O_CLOEXEC 02000000
+#define O_SEARCH 010000000
#define O_ASYNC 020000
#define O_DIRECT 0200000
#define O_LARGEFILE 0400000
#define O_NOATIME 01000000
#define O_NDELAY O_NONBLOCK
#define O_ASYNC 020000
#define O_DIRECT 0200000
#define O_LARGEFILE 0400000
#define O_NOATIME 01000000
#define O_NDELAY O_NONBLOCK
+#define O_PATH 010000000
#define F_DUPFD 0
#define F_GETFD 1
#define F_DUPFD 0
#define F_GETFD 1
#define O_DIRECTORY 0200000
#define O_NOFOLLOW 0400000
#define O_CLOEXEC 02000000
#define O_DIRECTORY 0200000
#define O_NOFOLLOW 0400000
#define O_CLOEXEC 02000000
+#define O_SEARCH 010000000
#define O_ASYNC 020000
#define O_DIRECT 040000
#define O_LARGEFILE 0100000
#define O_NOATIME 01000000
#define O_NDELAY O_NONBLOCK
#define O_ASYNC 020000
#define O_DIRECT 040000
#define O_LARGEFILE 0100000
#define O_NOATIME 01000000
#define O_NDELAY O_NONBLOCK
+#define O_PATH 010000000
#define F_DUPFD 0
#define F_GETFD 1
#define F_DUPFD 0
#define F_GETFD 1
#define O_NOFOLLOW 0400000
#define O_NOATIME 01000000
#define O_CLOEXEC 02000000
#define O_NOFOLLOW 0400000
#define O_NOATIME 01000000
#define O_CLOEXEC 02000000
+#define O_PATH 010000000
+#define O_SEARCH 010000000
#define O_NDELAY O_NONBLOCK
#define O_NDELAY O_NONBLOCK
#define O_DIRECTORY 0200000
#define O_NOFOLLOW 0400000
#define O_CLOEXEC 02000000
#define O_DIRECTORY 0200000
#define O_NOFOLLOW 0400000
#define O_CLOEXEC 02000000
+#define O_SEARCH 010000000
#define O_ASYNC 020000
#define O_DIRECT 040000
#define O_LARGEFILE 0
#define O_NOATIME 01000000
#define O_NDELAY O_NONBLOCK
#define O_ASYNC 020000
#define O_DIRECT 040000
#define O_LARGEFILE 0
#define O_NOATIME 01000000
#define O_NDELAY O_NONBLOCK
+#define O_PATH 010000000
#define F_DUPFD 0
#define F_GETFD 1
#define F_DUPFD 0
#define F_GETFD 1
int posix_fadvise(int, off_t, off_t, int);
int posix_fallocate(int, off_t, off_t);
int posix_fadvise(int, off_t, off_t, int);
int posix_fallocate(int, off_t, off_t);
+#define O_ACCMODE (O_RDWR|O_SEARCH)
#define O_RDONLY 00
#define O_WRONLY 01
#define O_RDWR 02
#define O_RDONLY 00
#define O_WRONLY 01
#define O_RDWR 02