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GENCAT(1P)                 POSIX Programmer's Manual                GENCAT(1P)

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

NAME
       gencat - generate a formatted message catalog

SYNOPSIS
       gencat catfile msgfile...

DESCRIPTION
       The gencat utility shall merge the message  text  source  file  msgfile
       into  a  formatted  message  catalog catfile. The file catfile shall be
       created if it does not already exist. If catfile does exist,  its  mes-
       sages  shall be included in the new catfile. If set and message numbers
       collide, the new message text defined in msgfile shall replace the  old
       message text currently contained in catfile.

OPTIONS
       None.

OPERANDS
       The following operands shall be supported:

       catfile
              A  pathname  of  the formatted message catalog. If '-' is speci-
              fied, standard output shall be used. The format of  the  message
              catalog produced is unspecified.

       msgfile
              A  pathname  of  a message text source file. If '-' is specified
              for an instance of msgfile, standard input shall  be  used.  The
              format  of  message text source files is defined in the EXTENDED
              DESCRIPTION section.

STDIN
       The standard input shall not be used unless a msgfile operand is speci-
       fied as '-' .

INPUT FILES
       The input files shall be text files.

ENVIRONMENT VARIABLES
       The  following environment variables shall affect the execution of gen-
       cat:

       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.

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

ASYNCHRONOUS EVENTS
       Default.

STDOUT
       The standard output shall not be used unless  the  catfile  operand  is
       specified as '-' .

STDERR
       The standard error shall be used only for diagnostic messages.

OUTPUT FILES
       None.

EXTENDED DESCRIPTION
       The  content  of  a message text file shall be in the format defined as
       follows. Note that the fields of a message text source line  are  sepa-
       rated by a single <blank>. Any other <blank>s are considered to be part
       of the subsequent field.

       $set  n comment

              This line specifies the set identifier of the following messages
              until  the  next  $set or end-of-file appears. The n denotes the
              set identifier, which is defined as a number in  the  range  [1,
              {NL_SETMAX}] (see the <limits.h> header defined in the Base Def-
              initions volume of IEEE Std 1003.1-2001). The application  shall
              ensure  that  set  identifiers  are presented in ascending order
              within a single source file, but need  not  be  contiguous.  Any
              string  following  the set identifier shall be treated as a com-
              ment. If no $set directive is specified in a message text source
              file, all messages shall be located in an implementation-defined
              default message set NL_SETD (see the <nl_types.h> header defined
              in the Base Definitions volume of IEEE Std 1003.1-2001).

       $delset  n comment

              This  line  deletes message set n from an existing message cata-
              log.  The n denotes the set number [1, {NL_SETMAX}]. Any  string
              following the set number shall be treated as a comment.

       $  comment
              A line beginning with '$' followed by a <blank> shall be treated
              as a comment.

       m message-text

              The m denotes the message identifier, which is defined as a num-
              ber  in  the range [1, {NL_MSGMAX}] (see the <limits.h> header).
              The message-text shall be stored in the message catalog with the
              set  identifier  specified  by the last $set directive, and with
              message identifier m.  If  the  message-text  is  empty,  and  a
              <blank>  field  separator  is  present, an empty string shall be
              stored in the message catalog. If a message source  line  has  a
              message  number, but neither a field separator nor message-text,
              the existing message with that number (if any) shall be  deleted
              from  the  catalog.  The  application  shall ensure that message
              identifiers are in ascending order within a single set, but need
              not  be contiguous. The application shall ensure that the length
              of message-text is in the range [0, {NL_TEXTMAX}] (see the <lim-
              its.h> header).

       $quote  n
              This  line specifies an optional quote character c, which can be
              used to surround message-text so that trailing  spaces  or  null
              (empty)  messages  are  visible  in  a  message source line.  By
              default, or if an empty $quote directive is supplied, no quoting
              of message-text shall be recognized.

       Empty lines in a message text source file shall be ignored. The effects
       of lines starting with any character other than those defined above are
       implementation-defined.

       Text  strings  can  contain the special characters and escape sequences
       defined in the following table:

                        Description         Symbol   Sequence
                        <newline>           NL(LF)   \n
                        Horizontal-tab      HT       \t
                        <vertical-tab>      VT       \v
                        <backspace>         BS       \b
                        <carriage-return>   CR       \r
                        <form-feed>         FF       \f
                        Backslash           \        \\
                        Bit pattern         ddd      \ddd

       The escape sequence "\ddd" consists of backslash followed by one,  two,
       or three octal digits, which shall be taken to specify the value of the
       desired character. If the character following a backslash is not one of
       those specified, the backslash shall be ignored.

       Backslash  (  '\'  ) followed by a <newline> is also used to continue a
       string on the following line. Thus, the following two lines describe  a
       single message string:

              1 This line continues \
              to the next line

       which shall be equivalent to:

              1 This line continues to the next line

EXIT STATUS
       The following exit values shall be returned:

        0     Successful completion.

       >0     An error occurred.

CONSEQUENCES OF ERRORS
       Default.

       The following sections are informative.

APPLICATION USAGE
       Message  catalogs  produced  by gencat are binary encoded, meaning that
       their portability cannot  be  guaranteed  between  different  types  of
       machine.  Thus,  just as C programs need to be recompiled for each type
       of machine, so message catalogs must be recreated via gencat.

EXAMPLES
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       iconv(), the Base Definitions  volume  of  IEEE Std 1003.1-2001,  <lim-
       its.h>, <nl_types.h>

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                           GENCAT(1P)
 

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