module Fcntl
Constants
- FD_CLOEXEC
-
the value of the close-on-exec flag.
- F_DUP2FD
-
It is a FreeBSD specific constant and equivalent to dup2 call.
- F_DUP2FD_CLOEXEC
-
It is a FreeBSD specific constant and acts similarly as
F_DUP2FD
but set theFD_CLOEXEC
flag in addition. - F_DUPFD
-
Duplicate a file descriptor to the minimum unused file descriptor greater than or equal to the argument.
The close-on-exec flag of the duplicated file descriptor is set. (Ruby uses F_DUPFD_CLOEXEC internally if available to avoid race condition.
F_SETFD
is used if F_DUPFD_CLOEXEC is not available.) - F_GETFD
-
Read the close-on-exec flag of a file descriptor.
- F_GETFL
-
Get the file descriptor flags. This will be one or more of the O_* flags.
- F_GETLK
-
Determine whether a given region of a file is locked. This uses one of the F_*LK flags.
- F_GETPIPE_SZ
-
Return (as the function result) the capacity of the pipe referred to by fd.
- F_RDLCK
-
Read lock for a region of a file
- F_SETFD
-
Set the close-on-exec flag of a file descriptor.
- F_SETFL
-
Set the file descriptor flags. This will be one or more of the O_* flags.
- F_SETLK
-
Acquire a lock on a region of a file. This uses one of the F_*LCK flags.
- F_SETLKW
-
Acquire a lock on a region of a file, waiting if necessary. This uses one of the F_*LCK flags
- F_SETPIPE_SZ
-
Change the capacity of the pipe referred to by fd to be at least arg bytes.
- F_UNLCK
-
Remove lock for a region of a file
- F_WRLCK
-
Write lock for a region of a file
- O_ACCMODE
-
Mask to extract the read/write flags
- O_APPEND
-
Open the file in append mode
- O_CREAT
-
Create the file if it doesn’t exist
- O_EXCL
-
Used with
O_CREAT
, fail if the file exists - O_NDELAY
-
Open the file in non-blocking mode
- O_NOCTTY
-
Open TTY without it becoming the controlling TTY
- O_NONBLOCK
-
Open the file in non-blocking mode
- O_RDONLY
-
Open the file in read-only mode
- O_RDWR
-
Open the file in read-write mode
- O_TRUNC
-
Truncate the file on open
- O_WRONLY
-
Open the file in write-only mode.
- VERSION