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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,  Section  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 standard 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 num-
              ber.  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 out-
              put  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%  key-
              word 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,  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 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,
              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 output 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 multiple 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 processed.

CONSEQUENCES OF ERRORS
       Default.

       The following sections are informative.

APPLICATION USAGE
       Since the val exit status sets the 0x80 bit, shell applications  check-
       ing "$?" 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 original Standard can be obtained online
       at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group                  2003                               VAL(P)

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