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Linux 2.6 - man page for val (linux section 1posix)

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

NAME
       val - validate SCCS files (DEVELOPMENT)

SYNOPSIS
       val -

       val [-s][-m name][-r SID][-y type] file...

DESCRIPTION
       The  val  utility  shall  determine whether the specified file is an SCCS file meeting the
       characteristics specified by the options.

OPTIONS
       The val utility shall conform to the Base Definitions volume of IEEE Std 1003.1-2001, Sec-
       tion  12.2,  Utility  Syntax  Guidelines,  except that the usage of the '-' operand is not
       strictly as intended by the guidelines (that is, reading options and operands  from  stan-
       dard input).

       The following options shall be supported:

       -m  name
	      Specify a name, which is compared with the SCCS %M% keyword in file; see get .

       -r  SID
	      Specify a SID (SCCS Identification String), an SCCS delta number.  A check shall be
	      made to determine whether the SID is ambiguous  (for  example,  -r 1  is	ambiguous
	      because  it  physically  does  not exist but implies 1.1, 1.2, and so on, which may
	      exist) or invalid (for example, -r 1.0 or -r 1.1.0 are invalid because neither case
	      can  exist as a valid delta number). If the SID is valid and not ambiguous, a check
	      shall be made to determine whether it actually exists.

       -s     Silence the diagnostic message normally written to standard output  for  any  error
	      that is detected while processing each named file on a given command line.

       -y  type
	      Specify  a type, which shall be compared with the SCCS %Y% keyword in file; see get
	      .

OPERANDS
       The following operands shall be supported:

       file   A pathname of an existing SCCS file. If exactly one file operand appears, and it is
	      '-'  , the standard input shall be read: each line shall be independently processed
	      as if it were a command line argument list. (However, the line is not subjected  to
	      any of the shell word expansions, such as parameter expansion or quote removal.)

STDIN
       The  standard  input  shall be a text file used only when the file operand is specified as
       '-' .

INPUT FILES
       Any SCCS files processed shall be files of an unspecified format.

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

       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, and informative messages written to
	      standard output.

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

ASYNCHRONOUS EVENTS
       Default.

STDOUT
       The standard output shall consist of informative messages about either:

	1. Each file processed

	2. Each command line read from standard input

       If the standard input is not used, for each file operand yielding a discrepancy, the  out-
       put line shall have the following format:

	      "%s: %s\n", <pathname>, <unspecified string>

       If  standard  input is used, a line of input shall be written before each of the preceding
       lines for files containing discrepancies:

	      "%s:\n", <input line>

STDERR
       Not used.

OUTPUT FILES
       None.

EXTENDED DESCRIPTION
       None.

EXIT STATUS
       The 8-bit code returned by val shall be a disjunction of the possible errors; that is,  it
       can be interpreted as a bit string where set bits are interpreted as follows:

			     0x80 ----- Missing file argument.
			     0x40 ----- Unknown or duplicate option.
			     0x20 ----- Corrupted SCCS file.
			     0x10 ----- Cannot open file or file not SCCS.
			     0x08 ----- SID is invalid or ambiguous.
			     0x04 ----- SID does not exist.
			     0x02 ----- %Y%, -y mismatch.
			     0x01 ----- %M%, -m mismatch.

       Note that val can process two or more files on a given command line and can process multi-
       ple command lines (when reading the standard input). In	these  cases  an  aggregate  code
       shall be returned: a logical OR of the codes generated for each command line and file pro-
       cessed.

CONSEQUENCES OF ERRORS
       Default.

       The following sections are informative.

APPLICATION USAGE
       Since the val exit status sets the 0x80 bit, shell applications checking "$?" cannot  tell
       if it terminated due to a missing file argument or receipt of a signal.

EXAMPLES
       In  a  directory  with three SCCS files- s.x (of t type "text"), s.y, and s.z (a corrupted
       file)-the following command could produce the output shown:

	      val - <<EOF
	      -y source s.x
	      -m y s.y
	      s.z
	      EOF

	      -y source s.x

		  s.x: %Y%, -y mismatch
	      s.z

		  s.z: corrupted SCCS file

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       admin , delta , get , prs

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					   VAL(P)


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