luaposix 33.2.1

• Index

Contents

• Functions

Modules

• posix
• posix.bit32
• posix.ctype
• posix.curses
• posix.dirent
• posix.errno
• posix.fcntl
• posix.fnmatch
• posix.getopt
• posix.glob
• posix.grp
• posix.libgen
• posix.poll
• posix.pwd
• posix.sched
• posix.signal
• posix.stdio
• posix.stdlib
• posix.sys.msg
• posix.sys.resource
• posix.sys.socket
• posix.sys.stat
• posix.sys.statvfs
• posix.sys.time
• posix.sys.times
• posix.sys.utsname
• posix.sys.wait
• posix.syslog
• posix.termio
• posix.time
• posix.unistd
• posix.utime

Classes

• posix.curses.chstr
• posix.curses.window

Examples

• curses.lua
• dir.lua
• fork.lua
• fork2.lua
• getopt.lua
• glob.lua
• limit.lua
• lock.lua
• netlink-uevent.lua
• ping.lua
• poll.lua
• rt_sched.lua
• signal.lua
• socket.lua
• termios.lua
• tree.lua

Module posix.stdlib

Standard Posix Library functions.

Functions

abort ()	Abort the program immediately.
getenv ([name])	Get value of environment variable, or all variables.
grantpt (fd)	Grant access to a slave pseudoterminal
mkdtemp (templ)	Create a unique temporary directory.
mkstemp (templ)	Create a unique temporary file.
openpt (oflags)	Open a pseudoterminal.
ptsname (fd)	Get the name of a slave pseudo-terminal
realpath (path)	Find canonicalized absolute pathname.
setenv (name[, value[, overwrite]])	Set an environment variable for this process.
unlockpt (fd)	Unlock a pseudoterminal master/slave pair

Functions

abort ()

Abort the program immediately.

See also:

abort(3)

getenv ([name])

Get value of environment variable, or all variables.

Parameters:

• name string if nil, get all (optional)

Returns:

value if name given, otherwise a name-indexed table of values.

See also:

getenv(3)

Usage:

for a,b in pairs(posix.getenv()) do print(a, b) end

grantpt (fd)

Grant access to a slave pseudoterminal

Parameters:

• fd int descriptor returned by openpt

Returns:

int 0, if successful

Or

1. nil
2. string error message
3. int errnum

See also:

• grantpt(3)
• openpt
• ptsname
• unlockpt

mkdtemp (templ)

Create a unique temporary directory.

Parameters:

• templ string pattern that ends in six 'X' characters

Returns:

string path to directory, if successful

Or

1. nil
2. string error message
3. int errnum

See also:

mkdtemp(3)

mkstemp (templ)

Create a unique temporary file.

Parameters:

• templ string pattern that ends in six 'X' characters

Returns:

int open file descriptor

Or

1. string path to file, if successful
2. nil
3. string error message
4. int errnum

See also:

mkstemp(3)

Usage:

P.mkstemp 'wooXXXXXX'

openpt (oflags)

Open a pseudoterminal.

Parameters:

• oflags int bitwise OR of zero or more of O_RDWR and O_NOCTTY

Returns:

file descriptor of pseudoterminal, if successful

Or

1. nil
2. string error message
3. int errnum

See also:

• posix_openpt(3)
• grantpt
• ptsname
• unlockpt

ptsname (fd)

Get the name of a slave pseudo-terminal

Parameters:

• fd int descriptor returned by openpt

Returns:

path name of the slave terminal device, if successful

Or

1. nil
2. string error message
3. int errnum

See also:

• ptsname(3)
• grantpt
• unlockpt

realpath (path)

Find canonicalized absolute pathname.

Parameters:

• path string file to act on

Returns:

string canonicalized absolute path, if successful

Or

1. nil
2. string error messag
3. int errnum

See also:

realpath(3)

setenv (name[, value[, overwrite]])

Set an environment variable for this process. (Child processes will inherit this)

Parameters:

• name string
• value string (maybe nil, meaning 'unset') (optional)
• overwrite non-nil prevents overwriting a variable (optional)

Returns:

int 0, if successful

Or

1. nil
2. string error message
3. int errnum

See also:

setenv(3)

unlockpt (fd)

Unlock a pseudoterminal master/slave pair

Parameters:

• fd int descriptor returned by openpt

Returns:

int 0, if successful

Or

1. nil
2. string error message
3. int errnum

See also:

• unlockpt(3)
• openpt
• ptsname
• grantpt