TYPE(P) POSIX Programmer's Manual TYPE(P)
type - write a description of command type
The type utility shall indicate how each argument would be interpreted if used as a com-
The following operand shall be supported:
name A name to be interpreted.
The following environment variables shall affect the execution of type:
LANG Provide a default value for the internationalization variables that are unset or
null. (See the Base Definitions volume of IEEE Std 1003.1-2001, Section 8.2, Inter-
nationalization Variables for the precedence of internationalization variables used
to determine the values of locale categories.)
LC_ALL If set to a non-empty string value, override the values of all the other interna-
Determine 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 argu-
Determine the locale that should be used to affect the format and contents of diag-
nostic messages written to standard error.
Determine the location of message catalogs for the processing of LC_MESSAGES .
PATH Determine the location of name, as described in the Base Definitions volume of
IEEE Std 1003.1-2001, Chapter 8, Environment Variables.
The standard output of type contains information about each operand in an unspecified for-
mat. The information provided typically identifies the operand as a shell built-in, func-
tion, alias, or keyword, and where applicable, may display the operand's pathname.
The standard error shall be used only for diagnostic messages.
The following exit values shall be returned:
0 Successful completion.
>0 An error occurred.
CONSEQUENCES OF ERRORS
The following sections are informative.
Since type must be aware of the contents of the current shell execution environment (such
as the lists of commands, functions, and built-ins processed by hash), it is always pro-
vided as a shell regular built-in. If it is called in a separate utility execution envi-
ronment, such as one of the following:
nohup type writer
find . -type f | xargs type
it might not produce accurate results.
command , hash
Portions of this text are reprinted and reproduced in electronic form from IEEE Std
1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System
Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by
the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and The Open Group
Standard, the original IEEE and The Open Group Standard is the referee document. The orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 TYPE(P)