VAL(1)                     POSIX Programmer's Manual                    VAL(1)



PROLOG
       This manual page is part of the POSIX Programmer's Manual.  The OS
       implementation of this interface may differ (consult the corresponding
       OS manual page for details of OS behavior), or the interface may not be
       implemented on OS.

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
       POSIX.1-2017, 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 %MM% 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 11 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 11..00 or -r 11..11..00
                 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 %YY%
                 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 POSIX.1-2017, 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 the standard input is used, for each input line yielding a
       discrepancy, the output shall have the following format:


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

       where <input> is the input line minus its terminating <newline>.

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   =   %YY%, -y mismatch.
       0x01   =   %MM%, -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--ss..xx (of tt 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

       The Base Definitions volume of POSIX.1-2017, Chapter _8, Environment
       Variables, Section 12.2, Utility Syntax Guidelines

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1-2017, Standard for Information Technology --
       Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, 2018 Edition, Copyright (C) 2018 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 .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .



IEEE/The Open Group                  2017                               VAL(1)
