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,
              Internationalization 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
              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 and input files).

       LC_MESSAGES
              Determine the locale that should be used to  affect  the  format  and  contents  of
              diagnostic 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
       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 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
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .