Module: Fcntl

Defined in:

fcntl.c

Constant Summary

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.)

INT2NUM(F_DUPFD)

F_GETFD =

Read the close-on-exec flag of a file descriptor.

INT2NUM(F_GETFD)

F_GETLK =

Determine whether a given region of a file is locked. This uses one of the F_*LK flags.

INT2NUM(F_GETLK)

F_SETFD =

Set the close-on-exec flag of a file descriptor.

INT2NUM(F_SETFD)

F_GETFL =

Get the file descriptor flags. This will be one or more of the O_* flags.

INT2NUM(F_GETFL)

F_SETFL =

Set the file descriptor flags. This will be one or more of the O_* flags.

INT2NUM(F_SETFL)

F_SETLK =

Acquire a lock on a region of a file. This uses one of the F_*LCK flags.

INT2NUM(F_SETLK)

F_SETLKW =

Acquire a lock on a region of a file, waiting if necessary. This uses one of the F_*LCK flags

INT2NUM(F_SETLKW)

FD_CLOEXEC =

the value of the close-on-exec flag.

INT2NUM(FD_CLOEXEC)

F_RDLCK =

Read lock for a region of a file

INT2NUM(F_RDLCK)

F_UNLCK =

Remove lock for a region of a file

INT2NUM(F_UNLCK)

F_WRLCK =

Write lock for a region of a file

INT2NUM(F_WRLCK)

O_CREAT =

Create the file if it doesn’t exist

INT2NUM(O_CREAT)

O_EXCL =

Used with O_CREAT, fail if the file exists

INT2NUM(O_EXCL)

O_NOCTTY =

Open TTY without it becoming the controlling TTY

INT2NUM(O_NOCTTY)

O_TRUNC =

Truncate the file on open

INT2NUM(O_TRUNC)

O_APPEND =

Open the file in append mode

INT2NUM(O_APPEND)

O_NONBLOCK =

Open the file in non-blocking mode

INT2NUM(O_NONBLOCK)

O_NDELAY =

Open the file in non-blocking mode

INT2NUM(O_NDELAY)

O_RDONLY =

Open the file in read-only mode

INT2NUM(O_RDONLY)

O_RDWR =

Open the file in read-write mode

INT2NUM(O_RDWR)

O_WRONLY =

Open the file in write-only mode.

INT2NUM(O_WRONLY)

O_ACCMODE =

Mask to extract the read/write flags

INT2FIX(O_RDONLY | O_WRONLY | O_RDWR)