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WHAT(P) 			    POSIX Programmer's Manual				  WHAT(P)

NAME
       what - identify SCCS files (DEVELOPMENT)

SYNOPSIS
       what [-s] file...

DESCRIPTION
       The  what utility shall search the given files for all occurrences of the pattern that get
       (see get ) substitutes for the %Z% keyword ( "@(#)" ) and shall write to  standard  output
       what follows until the first occurrence of one of the following:

	      "   >   newline	\   NUL

OPTIONS
       The  what  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:

       -s     Quit after finding the first occurrence of the pattern in each file.

OPERANDS
       The following operands shall be supported:

       file   A pathname of a file to search.

STDIN
       Not used.

INPUT FILES
       The input files shall be of any file type.

ENVIRONMENT VARIABLES
       The following environment variables shall affect the execution of what:

       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-
	      tionalization 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 argu-
	      ments and input files).

       LC_MESSAGES
	      Determine the locale that should be used to affect the format and contents of diag-
	      nostic messages written to standard error.

       NLSPATH
	      Determine the location of message catalogs for the processing of LC_MESSAGES .

ASYNCHRONOUS EVENTS
       Default.

STDOUT
       The standard output shall consist of the following for each file operand:

	      "%s:\n\t%s\n", <pathname>, <identification string>

STDERR
       The standard error shall be used only for diagnostic messages.

OUTPUT FILES
       None.

EXTENDED DESCRIPTION
       None.

EXIT STATUS
       The following exit values shall be returned:

       0      Any matches were found.

       1      Otherwise.

CONSEQUENCES OF ERRORS
       Default.

       The following sections are informative.

APPLICATION USAGE
       The  what  utility  is intended to be used in conjunction with the SCCS command get, which
       automatically inserts identifying information, but it can also be used where the  informa-
       tion 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 library routine.

EXAMPLES
       If the C-language program in file f.c contains:

	      char ident[] = "@(#)identification information";

       and f.c is compiled to yield f.o and a.out, then the command:

	      what f.c f.o a.out

       writes:

	      f.c:
		  identification information
		  ...
	      f.o:
		  identification information
		  ...
	      a.out:
		  identification information
		  ...

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       get

COPYRIGHT
       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					  WHAT(P)
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