Switch to SpeakEasy.net DSL

The Modular Manual Browser

Home Page
Manual: (OSF1-V5.1-alpha)
Apropos / Subsearch:
optional field

command(1)							   command(1)


  command - Treats command arguments as	simple commands


  command [-p] command_name [argument...]

  command [-v  | -V] command_name

  The command command causes the shell to treat	the arguments to command as
  simple commands, and suppresses the default shell function lookup.


  Interfaces documented	on this	reference page conform to industry standards
  as follows:

  command:  XCU5.0

  Refer	to the standards(5) reference page for more information	about indus-
  try standards	and associated tags.


  -p  Performs the command search using	a default value	for PATH that is
      guaranteed to find all of	the standard utilities.

  -v  Writes a string to standard output that indicates	the path name or com-
      mand to be used by the shell in the current shell	execution environment
      to invoke	command_name.

  -V  Writes a string to standard output that indicates	how the	name given in
      the command_name operand will be interpreted by the shell	in the
      current shell execution environment.


  The command command allows you to run	the following commands:

    +  User-defined commands whose names correspond to shell built-in com-

    +  System commands whose names correspond to shell built-in	commands.

  The command_name argument specifies the name of a utility.  The one or more
  optional arguments to	command_name specify strings treated as	arguments to
  the specified	utility.  It also provides information concerning how a	com-
  mand name will be interpreted	by the shell.


  [Tru64 UNIX]	If command_name	is not the name	of a function, the effect of
  command is the same as would be obtained by specifying command_name without


  Since	the -v and -V options to command produce output	in relation to the
  current shell	execution environment, if command is called in a subshell or
  separate utility execution environment, it may not produce correct results.
  The following	are examples of	this type of operation:

       (PATH=foo command -v)
       nohup command -v


  When the -v or -V options are	specified, command returns one of the follow-
  ing values.

  0   Successful completion.

  >>0  The command_name could not be found, or an error occurred.

  If the -v or -V options are not specified, command returns one of the	fol-
  lowing values	on error.

  126 The utility specified by command_name was	found but could	not be

  127 An error occurred	in the command command,	or the utility specified by
      the command_name argument	could not be invoked.

  If no	error occurs, the exit status of command is that of the	command
  specified by the arguments to	command.


  To ensure execution of the simple command pwd	instead	of the pwd shell
  built-in command, enter the following:

       command -p pwd

  The preceding	command	displays the full path name of the current directory,
  and does not perpetuate a view of the	current	directory location created by
  links	as the shell built-in command might do.


  The following	environment variables affect the execution of command:

      Provides a default value for the internationalization variables that
      are unset	or null. If LANG is unset or null, the corresponding value
      from the default locale is used.	If any of the internationalization
      variables	contains an invalid setting, the utility behaves as if none
      of the variables had been	defined.

      If set to	a non-empty string value, overrides the	values of all the
      other internationalization variables.

      Determines the locale for	the interpretation of sequences	of bytes of
      text data	as characters (for example, single-byte	as opposed to multi-
      byte characters in arguments).

      Determines the locale that should	be used	to affect the format and con-
      tents of diagnostic messages written to standard error.

      Determines the location of message catalogues for	the processing of

      Determines the search path used during the command search	unless the -p
      option is	specified.


  Commands:  env(1), hash(1), type(1)

  Standards:  standards(5)