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  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, 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, 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 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
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .