- 1_8_6_287
- 1_8_7_72
- 1_8_7_330
- 1_9_1_378 (0)
- 1_9_2_180 (0)
- 1_9_3_125 (0)
- 1_9_3_392 (0)
- 2_1_10 (-38)
- 2_2_9 (0)
- 2_4_6 (0)
- 2_5_5 (0)
- 2_6_3 (0)
- What's this?
Fcntl loads the constants defined in the system’s <fcntl.h> C header file, and used with both the fcntl(2) and open(2) POSIX system calls.
To perform a fcntl(2) operation, use IO::fcntl.
To perform an open(2) operation, use IO::sysopen.
The set of operations and constants available depends upon specific operating system. Some values listed below may not be supported on your system.
See your fcntl(2) man page for complete details.
Open /tmp/tempfile as a write-only file that is created if it doesn’t exist:
require 'fcntl' fd = IO.sysopen('/tmp/tempfile', Fcntl::O_WRONLY | Fcntl::O_EXCL | Fcntl::O_CREAT) f = IO.open(fd) f.syswrite("TEMP DATA") f.close
Get the flags on file s:
m = s.fcntl(Fcntl::F_GETFL, 0)
Set the non-blocking flag on f in addition to the existing flags in m.
f.fcntl(Fcntl::F_SETFL, Fcntl::O_NONBLOCK|m)
Constants
O_ACCMODE = Document-const
O_WRONLY = Document-const
O_RDWR = Document-const
O_RDONLY = Document-const
O_NDELAY = Document-const
O_NONBLOCK = Document-const
O_APPEND = Document-const
O_TRUNC = Document-const
O_NOCTTY = Document-const
O_EXCL = Document-const
O_CREAT = Document-const
F_WRLCK = Document-const
F_UNLCK = Document-const
F_RDLCK = Document-const
FD_CLOEXEC = Document-const
F_SETLKW = Document-const
F_SETLK = Document-const
F_SETFL = Document-const
F_GETFL = Document-const
F_SETFD = Document-const
F_GETLK = Document-const
F_GETFD = Document-const
F_DUPFD = Document-const