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<html>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
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<head>
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<title>luaposix 33.3.0 Reference</title>
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<link rel="stylesheet" href="../ldoc.css" type="text/css" />
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</head>
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<body>
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<big></big>
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luaposix 33.3.0
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Index
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Contents
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Functions
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Modules
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posix
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posix.ctype
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posix.curses
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posix.dirent
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posix.errno
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posix.fcntl
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posix.fnmatch
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posix.getopt
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posix.glob
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posix.grp
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posix.libgen
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posix.poll
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posix.pwd
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posix.sched
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posix.signal
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posix.stdio
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posix.stdlib
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posix.sys.msg
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posix.sys.resource
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posix.sys.socket
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posix.sys.stat
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posix.sys.statvfs
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posix.sys.time
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posix.sys.times
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posix.sys.utsname
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posix.sys.wait
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posix.syslog
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posix.termio
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posix.time
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posix.unistd
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posix.utime
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Classes
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posix.curses.chstr
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posix.curses.window
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Examples
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curses.lua
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dir.lua
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fork.lua
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fork2.lua
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437b5e |
getopt.lua
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glob.lua
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limit.lua
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lock.lua
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437b5e |
netlink-uevent.lua
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ping.lua
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poll.lua
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437b5e |
rt_sched.lua
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437b5e |
signal.lua
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socket.lua
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termios.lua
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tree.lua
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Module posix
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Lua POSIX bindings.
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In addition to the convenience functions documented in this module, all
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APIs from submodules are copied into the return table for convenience and
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backwards compatibility.
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chmod (path, mode)
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Change the mode of the path.
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creat (path, mode)
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Create a file.
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euidaccess (file, mode)
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Check permissions like posix.unistd.access, but for euid.
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execx (task, ...)
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Exec a command or Lua function.
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mkdir (path)
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Make a directory.
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mkfifo (path)
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Make a FIFO pipe.
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msgget (key[, flags=0[, mode="rw-rw-rw-"]])
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Get a message queue identifier
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open (path, oflags, modestr)
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Open a file.
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pclose (pfd)
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Close a pipeline opened with popen or popen_pipeline.
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popen (as, mode[, pipe_fn])
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Run a commands or Lua function in a sub-process.
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popen_pipeline (t, mode[, pipe_fn])
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Perform a series of commands and Lua functions as a pipeline.
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setlogmask (...)
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Set log priority mask
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spawn (task, ...)
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Run a command or function in a sub-process using P.execx.
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timeradd (x, y)
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Add one gettimeofday() returned timeval to another.
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timercmp (x, y)
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Compare one gettimeofday() returned timeval with another
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timersub (x, y)
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Subtract one gettimeofday() returned timeval from another.
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umask ([mode])
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Set file mode creation mask.
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Functions
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chmod (path, mode)
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Change the mode of the path.
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Parameters:
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path
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string
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existing file path
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mode
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string
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one of the following formats:
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"rwxrwxrwx" (e.g. "rw-rw-r--")
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"ugo+-=rwx" (e.g. "u+w")
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+-=rwx" (e.g. "+w")
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Returns:
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int 0, if successful
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Or
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nil
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string
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error message
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int
|
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errnum
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See also:
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chmod(2)
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Usage:
|
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437b5e |
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437b5e |
P.chmod ('bin/dof', '+x')
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437b5e |
creat (path, mode)
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437b5e |
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437b5e |
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Create a file.
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437b5e |
This function is obsoleted by posix.fcntl.open with posix.O_CREAT.
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Parameters:
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path
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string
|
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name of file to create
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mode
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string
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permissions with which to create file
|
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Returns:
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|
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int
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437b5e |
file descriptor of file at path, if successful
|
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Or
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nil
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string
|
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error message
|
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int
|
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errnum
|
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See also:
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creat(2)
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posix.chmod
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Usage:
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fd = P.creat ("data", "rw-r-----")
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437b5e |
euidaccess (file, mode)
|
|
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437b5e |
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|
Packit |
437b5e |
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|
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437b5e |
Check permissions like posix.unistd.access, but for euid.
|
|
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437b5e |
Based on the glibc function of the same name. Does not always check
|
|
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437b5e |
for read-only file system, text busy, etc., and does not work with
|
|
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437b5e |
ACLs &c.
|
|
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437b5e |
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|
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|
|
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437b5e |
Parameters:
|
|
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437b5e |
|
|
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437b5e |
file
|
|
Packit |
437b5e |
string
|
|
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437b5e |
file to check
|
|
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437b5e |
|
|
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437b5e |
mode
|
|
Packit |
437b5e |
string
|
|
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437b5e |
checks to perform (as for access)
|
|
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437b5e |
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437b5e |
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437b5e |
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437b5e |
Returns:
|
|
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437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
0 if access allowed; nil otherwise (and errno is set)
|
|
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437b5e |
|
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437b5e |
|
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437b5e |
|
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Packit |
437b5e |
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437b5e |
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437b5e |
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|
Packit |
437b5e |
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|
Packit |
437b5e |
|
|
Packit |
437b5e |
execx (task, ...)
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Exec a command or Lua function.
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Parameters:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
task
|
|
Packit |
437b5e |
, a string to be executed as a shell command, or a
|
|
Packit |
437b5e |
table of arguments to P.execp or a Lua function, which should read
|
|
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437b5e |
from standard input, write to standard output, and return an exit code
|
|
Packit |
437b5e |
|
|
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437b5e |
...
|
|
Packit |
437b5e |
string
|
|
Packit |
437b5e |
positional arguments to the program or function
|
|
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437b5e |
|
|
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437b5e |
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437b5e |
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437b5e |
Returns:
|
|
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437b5e |
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|
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437b5e |
|
|
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437b5e |
nil
|
|
Packit |
437b5e |
on error (normally does not return)
|
|
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437b5e |
|
|
Packit |
437b5e |
string
|
|
Packit |
437b5e |
error message
|
|
Packit |
437b5e |
|
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437b5e |
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437b5e |
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437b5e |
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437b5e |
|
|
Packit |
437b5e |
mkdir (path)
|
|
Packit |
437b5e |
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Packit |
437b5e |
|
|
Packit |
437b5e |
Make a directory.
|
|
Packit |
437b5e |
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Packit |
437b5e |
|
|
Packit |
437b5e |
Parameters:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
path
|
|
Packit |
437b5e |
string
|
|
Packit |
437b5e |
location in file system to create directory
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Returns:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
int
|
|
Packit |
437b5e |
0, if successful
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Or
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
nil
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
string
|
|
Packit |
437b5e |
error message
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
int
|
|
Packit |
437b5e |
errnum
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
mkfifo (path)
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Make a FIFO pipe.
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Parameters:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
path
|
|
Packit |
437b5e |
string
|
|
Packit |
437b5e |
location in file system to create fifo
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Returns:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
int
|
|
Packit |
437b5e |
0, if successful
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Or
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
nil
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
string
|
|
Packit |
437b5e |
error message
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
int
|
|
Packit |
437b5e |
errnum
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
msgget (key[, flags=0[, mode="rw-rw-rw-"]])
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Get a message queue identifier
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Parameters:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
key
|
|
Packit |
437b5e |
int
|
|
Packit |
437b5e |
message queue id, or IPC_PRIVATE for a new queue
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
flags
|
|
Packit |
437b5e |
int
|
|
Packit |
437b5e |
bitwise OR of zero or more from IPC_CREAT and IPC_EXCL
|
|
Packit |
437b5e |
(default 0)
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
mode
|
|
Packit |
437b5e |
string
|
|
Packit |
437b5e |
execute bits are ignored
|
|
Packit |
437b5e |
(default "rw-rw-rw-")
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Returns:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
int
|
|
Packit |
437b5e |
message queue identifier, if successful
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Or
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
nil
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
string
|
|
Packit |
437b5e |
error message
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
int
|
|
Packit |
437b5e |
errnum
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
See also:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
msgget(2)
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
open (path, oflags, modestr)
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Open a file.
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Parameters:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
path
|
|
Packit |
437b5e |
string
|
|
Packit |
437b5e |
file to act on
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
oflags
|
|
Packit |
437b5e |
int
|
|
Packit |
437b5e |
bitwise OR of zero or more of O_RDONLY, O_WRONLY, O_RDWR,
|
|
Packit |
437b5e |
O_APPEND, O_CREAT, O_DSYNC, O_EXCL, O_NOCTTY, O_NONBLOCK,
|
|
Packit |
437b5e |
O_RSYNC, O_SYNC, O_TRUNC
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
modestr
|
|
Packit |
437b5e |
string
|
|
Packit |
437b5e |
(used with O_CREAT; see chmod for format)
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Returns:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
int
|
|
Packit |
437b5e |
file descriptor for path, if successful
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Or
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
nil
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
string
|
|
Packit |
437b5e |
error message
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
int
|
|
Packit |
437b5e |
errnum
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
See also:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
open(2)
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Usage:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
fd = P.open ("data", bit.bor (P.O_CREAT, P.O_RDWR), "rw-r-----")
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
pclose (pfd)
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Close a pipeline opened with popen or popen_pipeline.
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Parameters:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
pfd
|
|
Packit |
437b5e |
table
|
|
Packit |
437b5e |
pipeline object
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Returns:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
values as for P.wait, for the last (or only) stage of the pipeline
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
popen (as, mode[, pipe_fn])
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Run a commands or Lua function in a sub-process.
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Parameters:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
as
|
|
Packit |
437b5e |
task,
|
|
Packit |
437b5e |
for execx
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
mode
|
|
Packit |
437b5e |
string
|
|
Packit |
437b5e |
"r" for read or "w" for write
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
pipe_fn
|
|
Packit |
437b5e |
func
|
|
Packit |
437b5e |
function returning a paired read and
|
|
Packit |
437b5e |
write file descriptor (default posix.unistd.pipe)
|
|
Packit |
437b5e |
(optional)
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Returns:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
pfd
|
|
Packit |
437b5e |
pipeline object
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
popen_pipeline (t, mode[, pipe_fn])
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Perform a series of commands and Lua functions as a pipeline.
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Parameters:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
t
|
|
Packit |
437b5e |
table
|
|
Packit |
437b5e |
tasks for execx
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
mode
|
|
Packit |
437b5e |
string
|
|
Packit |
437b5e |
"r" for read or "w" for write
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
pipe_fn
|
|
Packit |
437b5e |
func
|
|
Packit |
437b5e |
function returning a paired read and
|
|
Packit |
437b5e |
write file descriptor (default posix.unistd.pipe)
|
|
Packit |
437b5e |
(optional)
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Returns:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
pfd
|
|
Packit |
437b5e |
pipeline object
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
setlogmask (...)
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Set log priority mask
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Parameters:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
...
|
|
Packit |
437b5e |
int
|
|
Packit |
437b5e |
zero or more of LOG_EMERG, LOG_ALERT, LOG_CRIT,
|
|
Packit |
437b5e |
LOG_WARNING, LOG_NOTICE, LOG_INFO and LOG_DEBUG
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Returns:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
int
|
|
Packit |
437b5e |
0, if successful
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Or
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
nil
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
string
|
|
Packit |
437b5e |
error message
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
int
|
|
Packit |
437b5e |
errnum
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
spawn (task, ...)
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Run a command or function in a sub-process using P.execx.
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Parameters:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
task
|
|
Packit |
437b5e |
, as for P.execx.
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
...
|
|
Packit |
437b5e |
string
|
|
Packit |
437b5e |
as for P.execx
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Returns:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
values as for P.wait
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
timeradd (x, y)
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Add one gettimeofday() returned timeval to another.
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Parameters:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
x
|
|
Packit |
437b5e |
a timeval
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
y
|
|
Packit |
437b5e |
another timeval
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Returns:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
x + y, adjusted for usec overflow
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
timercmp (x, y)
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Compare one gettimeofday() returned timeval with another
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Parameters:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
x
|
|
Packit |
437b5e |
a timeval
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
y
|
|
Packit |
437b5e |
another timeval
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
Returns:
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
|
|
Packit |
437b5e |
0 if x and y are equal, >0 if x is newer, <0 if y is newer
|
|
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timersub (x, y)
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Subtract one gettimeofday() returned timeval from another.
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Parameters:
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x
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a timeval
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y
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another timeval
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Returns:
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x - y, adjusted for usec underflow
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umask ([mode])
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Set file mode creation mask.
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Parameters:
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mode
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string
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file creation mask string
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(optional)
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Returns:
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string
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previous umask
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See also:
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umask(2)
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posix.sys.stat.umask
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generated by LDoc 1.4.3
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Last updated 2015-03-01 09:06:02
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</body>
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</html>
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