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Blame doc/examples/lock.lua.html

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Packit	437b5e	`<title>luaposix 33.3.0 Reference</title>`
Packit	437b5e	`<link rel="stylesheet" href="../ldoc.css" type="text/css" />`
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Packit	437b5e	`<big></big>`
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Packit	437b5e	`luaposix 33.3.0`
Packit	437b5e
Packit	437b5e
Packit	437b5e	`Index`
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Packit	437b5e	`Examples`
Packit	437b5e
Packit	437b5e	`curses.lua`
Packit	437b5e	`dir.lua`
Packit	437b5e	`fork.lua`
Packit	437b5e	`fork2.lua`
Packit	437b5e	`getopt.lua`
Packit	437b5e	`glob.lua`
Packit	437b5e	`limit.lua`
Packit	437b5e	`lock.lua`
Packit	437b5e	`netlink-uevent.lua`
Packit	437b5e	`ping.lua`
Packit	437b5e	`poll.lua`
Packit	437b5e	`rt_sched.lua`
Packit	437b5e	`signal.lua`
Packit	437b5e	`socket.lua`
Packit	437b5e	`termios.lua`
Packit	437b5e	`tree.lua`
Packit	437b5e
Packit	437b5e	`Modules`
Packit	437b5e
Packit	437b5e	`posix`
Packit	437b5e	`posix.ctype`
Packit	437b5e	`posix.curses`
Packit	437b5e	`posix.dirent`
Packit	437b5e	`posix.errno`
Packit	437b5e	`posix.fcntl`
Packit	437b5e	`posix.fnmatch`
Packit	437b5e	`posix.getopt`
Packit	437b5e	`posix.glob`
Packit	437b5e	`posix.grp`
Packit	437b5e	`posix.libgen`
Packit	437b5e	`posix.poll`
Packit	437b5e	`posix.pwd`
Packit	437b5e	`posix.sched`
Packit	437b5e	`posix.signal`
Packit	437b5e	`posix.stdio`
Packit	437b5e	`posix.stdlib`
Packit	437b5e	`posix.sys.msg`
Packit	437b5e	`posix.sys.resource`
Packit	437b5e	`posix.sys.socket`
Packit	437b5e	`posix.sys.stat`
Packit	437b5e	`posix.sys.statvfs`
Packit	437b5e	`posix.sys.time`
Packit	437b5e	`posix.sys.times`
Packit	437b5e	`posix.sys.utsname`
Packit	437b5e	`posix.sys.wait`
Packit	437b5e	`posix.syslog`
Packit	437b5e	`posix.termio`
Packit	437b5e	`posix.time`
Packit	437b5e	`posix.unistd`
Packit	437b5e	`posix.utime`
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Packit	437b5e	`Classes`
Packit	437b5e
Packit	437b5e	`posix.curses.chstr`
Packit	437b5e	`posix.curses.window`
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Packit	437b5e	`lock.lua`
Packit	437b5e
Packit	437b5e	`local p = require "posix"`
Packit	437b5e	`local fd = p.creat("file.txt", "rw-r--r--")`
Packit	437b5e
Packit	437b5e	`-- Set lock on file`
Packit	437b5e	`local lock = {`
Packit	437b5e	`l_type = p.F_WRLCK; -- Exclusive lock`
Packit	437b5e	`l_whence = p.SEEK_SET; -- Relative to beginning of file`
Packit	437b5e	`l_start = 0; -- Start from 1st byte`
Packit	437b5e	`l_len = 0; -- Lock whole file`
Packit	437b5e	`}`
Packit	437b5e	`local result = p.fcntl(fd, p.F_SETLK, lock)`
Packit	437b5e	`if result == -1 then`
Packit	437b5e	`error("file locked by another process")`
Packit	437b5e	`end`
Packit	437b5e
Packit	437b5e	`-- Do something with file while it's locked`
Packit	437b5e	`p.write(fd, "Lorem ipsum\n")`
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Packit	437b5e	`-- Release the lock`
Packit	437b5e	`lock.l_type = p.F_UNLCK`
Packit	437b5e	`p.fcntl(fd, p.F_SETLK, lock)`
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Packit	437b5e
Packit	437b5e	`generated by LDoc 1.4.3`
Packit	437b5e	`Last updated 2015-03-01 09:06:02`
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Packit	437b5e	`</body>`
Packit	437b5e	`</html>`

source-git / lua-posix

Source Code

Blame doc/examples/lock.lua.html

luaposix 33.3.0

Examples

Modules

Classes

lock.lua