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config ()
  • >> config (5) ( Solaris man: Форматы файлов )
  • config (5) ( FreeBSD man: Форматы файлов )
  • config (5) ( Linux man: Форматы файлов )
  • config (8) ( FreeBSD man: Команды системного администрирования )
  • Ключ config обнаружен в базе ключевых слов.


         config - OpenSSL CONF library configuration files


         The OpenSSL CONF library can be used to read configuration
         files.  It is used for the OpenSSL master configuration file
         openssl.cnf and in a few other places like SPKAC files and
         certificate extension files for the x509 utility.
         A configuration file is divided into a number of sections.
         Each section starts with a line [ section_name ] and ends
         when a new section is started or end of file is reached. A
         section name can consist of alphanumeric characters and
         The first section of a configuration file is special and is
         referred to as the default section this is usually unnamed
         and is from the start of file until the first named section.
         When a name is being looked up it is first looked up in a
         named section (if any) and then the default section.
         The environment is mapped onto a section called ENV.
         Comments can be included by preceding them with the #
         Each section in a configuration file consists of a number of
         name and value pairs of the form name=value
         The name string can contain any alphanumeric characters as
         well as a few punctuation symbols such as . , ; and _.
         The value string consists of the string following the =
         character until end of line with any leading and trailing
         white space removed.
         The value string undergoes variable expansion. This can be
         done by including the form $var or ${var}: this will
         substitute the value of the named variable in the current
         section. It is also possible to substitute a value from
         another section using the syntax $section::name or
         ${section::name}. By using the form $ENV::name environment
         variables can be substituted. It is also possible to assign
         values to environment variables by using the name ENV::name,
         this will work if the program looks up environment variables
         using the CONF library instead of calling getenv() directly.
         It is possible to escape certain characters by using any
         kind of quote or the \ character. By making the last
         character of a line a \ a value string can be spread across
         multiple lines. In addition the sequences \n, \r, \b and \t
         are recognized.


         If a configuration file attempts to expand a variable that
         doesn't exist then an error is flagged and the file will not
         load. This can happen if an attempt is made to expand an
         environment variable that doesn't exist. For example the
         default OpenSSL master configuration file used the value of
         HOME which may not be defined on non Unix systems.
         This can be worked around by including a default section to
         provide a default value: then if the environment lookup
         fails the default value will be used instead. For this to
         work properly the default value must be defined earlier in
         the configuration file than the expansion. See the EXAMPLES
         section for an example of how to do this.
         If the same variable exists in the same section then all but
         the last value will be silently ignored. In certain
         circumstances such as with DNs the same field may occur
         multiple times. This is usually worked around by ignoring
         any characters before an initial . e.g.
          1.OU="My first OU"
          2.OU="My Second OU"


         Here is a sample configuration file using some of the
         features mentioned above.
          # This is the default section.
          RANDFILE= ${ENV::HOME}/.rnd
          [ section_one ]
          # We are now in section one.
          # Quotes permit leading and trailing whitespace
          any = " any variable name "
          other = A string that can \
          cover several lines \
          by including \\ characters
          message = Hello World\n
          [ section_two ]
          greeting = $section_one::message
         This next example shows how to expand environment variables
         Suppose you want a variable called tmpfile to refer to a
         temporary filename. The directory it is placed in can
         determined by the the TEMP or TMP environment variables but
         they may not be set to any value at all. If you just include
         the environment variable names and the variable doesn't
         exist then this will cause an error when an attempt is made
         to load the configuration file. By making use of the default
         section both values can be looked up with TEMP taking
         priority and /tmp used if neither is defined:
          # The above value is used if TMP isn't in the environment
          # The above value is used if TEMP isn't in the environment


         Currently there is no way to include characters using the
         octal \nnn form. Strings are all null terminated so nulls
         cannot form part of the value.
         The escaping isn't quite right: if you want to use sequences
         like \n you can't use any quote escaping on the same line.
         Files are loaded in a single pass. This means that an
         variable expansion will only work if the variables
         referenced are defined earlier in the file.


         x509(1), req(1), ca(1)

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