TYPE(1P) POSIX Programmer's Manual TYPE(1P)PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the corresponding
Linux manual page for details of Linux behavior), or the interface may
not be implemented on Linux.
NAMEtype — write a description of command typeSYNOPSIStype name...
The type utility shall indicate how each argument would be interpreted
if used as a command name.
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 vari‐
ables that are unset or null. (See the Base Definitions vol‐
ume of POSIX.1‐2008, Section 8.2, Internationalization Vari‐
ables 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 internationalization variables.
LC_CTYPE 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 arguments).
Determine the locale that should be used to affect the format
and contents of diagnostic messages written to standard
NLSPATH Determine the location of message catalogs for the processing
PATH Determine the location of name, as described in the Base Def‐
initions volume of POSIX.1‐2008, Chapter 8, Environment Vari‐
The standard output of type contains information about each operand in
an unspecified format. The information provided typically identifies
the operand as a shell built-in, function, 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 provided as a shell regular built-in.
If it is called in a separate utility execution environment, such as
one of the following:
nohup type writer
find . −type f | xargs type
it might not produce accurate results.
The Base Definitions volume of POSIX.1‐2008, Chapter 8, Environment
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
cal and Electronics Engineers, Inc and The Open Group. (This is
POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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 original Standard can be obtained online
at http://www.unix.org/online.html .
Any typographical or formatting errors that appear in this page are
most likely to have been introduced during the conversion of the source
files to man page format. To report such errors, see https://www.ker‐
IEEE/The Open Group 2013 TYPE(1P)