Originální popis anglicky:
what - identify SCCS files ( DEVELOPMENT
Návod, kniha: POSIX Programmer's Manual
what [-s] file...
utility shall search the given files for all occurrences of the
pattern that get
) substitutes for the % Z
keyword ( "@(#)"
) and shall write to standard output what
follows until the first occurrence of one of the following:
utility shall conform to the Base Definitions volume of
IEEE Std 1003.1-2001, Section 12.2, Utility Syntax Guidelines.
The following option shall be supported:
- Quit after finding the first occurrence of the pattern in
The following operands shall be supported:
- A pathname of a file to search.
The input files shall be of any file type.
The following environment variables shall affect the execution of what
- 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, Internationalization
Variables for the precedence of internationalization variables used to
determine the values of locale categories.)
- If set to a non-empty string value, override the values of
all the other internationalization variables.
- 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 and input files).
- Determine the locale that should be used to affect the
format and contents of diagnostic messages written to standard error.
- Determine the location of message catalogs for the
processing of LC_MESSAGES .
The standard output shall consist of the following for each file
"%s:\n\t%s\n", <pathname>, <identification string>
The standard error shall be used only for diagnostic messages.
The following exit values shall be returned:
- Any matches were found.
The following sections are informative.
utility is intended to be used in conjunction with the SCCS
, which automatically inserts identifying information, but
it can also be used where the information is inserted by any other means.
When the string "@(#)"
is included in a library routine in a
shared library, it might not be found in an a.out
file using that
If the C-language program in file f.c
char ident = "@(#)identification information";
is compiled to yield f.o
, then the
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 original
Standard can be obtained online at http://www.opengroup.org/unix/online.html