EnglishFrenchSpanish

Ad


OnWorks favicon

evalposix - Online in the Cloud

Run evalposix in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command evalposix that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


eval — construct command by concatenating arguments

SYNOPSIS


eval [argument...]

DESCRIPTION


The eval utility shall construct a command by concatenating arguments together, separating
each with a <space> character. The constructed command shall be read and executed by the
shell.

OPTIONS


None.

OPERANDS


See the DESCRIPTION.

STDIN


Not used.

INPUT FILES


None.

ENVIRONMENT VARIABLES


None.

ASYNCHRONOUS EVENTS


Default.

STDOUT


Not used.

STDERR


The standard error shall be used only for diagnostic messages.

OUTPUT FILES


None.

EXTENDED DESCRIPTION


None.

EXIT STATUS


If there are no arguments, or only null arguments, eval shall return a zero exit status;
otherwise, it shall return the exit status of the command defined by the string of
concatenated arguments separated by <space> characters, or a non-zero exit status if the
concatenation could not be parsed as a command and the shell is interactive (and therefore
did not abort).

CONSEQUENCES OF ERRORS


Default.

The following sections are informative.

APPLICATION USAGE


Since eval is not required to recognize the "--" end of options delimiter, in cases where
the argument(s) to eval might begin with '-' it is recommended that the first argument is
prefixed by a string that will not alter the commands to be executed, such as a <space>
character:

eval " $commands"

or:

eval " $(some_command)"

EXAMPLES


foo=10 x=foo
y='$'$x
echo $y
$foo
eval y='$'$x
echo $y
10

RATIONALE


This standard allows, but does not require, eval to recognize "--". Although this means
applications cannot use "--" to protect against options supported as an extension (or
errors reported for unsupported options), the nature of the eval utility is such that
other means can be used to provide this protection (see APPLICATION USAGE above).

FUTURE DIRECTIONS


None.

Use evalposix online using onworks.net services


Free Servers & Workstations

Download Windows & Linux apps

  • 1
    s3cmd
    s3cmd
    Open-source tool to access Amazon S3
    file storage. S3cmd is a free command
    line tool and client for uploading,
    retrieving and managing data in Amazon
    S3 and ot...
    Download s3cmd
  • 2
    XyZerKunG ServerTool
    XyZerKunG ServerTool
    XyZerKunG ServerTool helps you to make
    your own Minecraft server and play with
    your friend for a few minutes.
    Features:Automatically create a
    Minecraft serverU...
    Download XyZerKunG ServerTool
  • 3
    CalcTools
    CalcTools
    Java source intended to serve as a
    nexus for teaching both mathematics and
    software solutions for computation on
    iterative equations. Public interfaces
    allow a...
    Download CalcTools
  • 4
    Rocket.Chat Desktop Client
    Rocket.Chat Desktop Client
    Rocket.Chat Desktop client is the
    official desktop app for Rocket.Chat,
    the simple but powerful open source web
    chat platform. It's tested on macOS,
    Windows...
    Download Rocket.Chat Desktop Client
  • 5
    OfficeFloor
    OfficeFloor
    OfficeFloor provides inversion of
    coupling control, with its: - dependency
    injection - continuation injection -
    thread injection For more information
    visit the...
    Download OfficeFloor
  • 6
    DivKit
    DivKit
    DivKit is an open source Server-Driven
    UI (SDUI) framework. It allows you to
    roll out server-sourced updates to
    different app versions. Also, it can be
    used fo...
    Download DivKit
  • More »

Linux commands

Ad