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Here's an update of the documentation of getopt. Andreas 1999-12-29 Andreas Jaeger <aj@suse.de> * manual/getopt.texi (Using Getopt): Document ordering of options. ============================================================ Index: manual/getopt.texi --- manual/getopt.texi 1999/03/19 02:17:38 2.2 +++ manual/getopt.texi 1999/12/29 13:58:31 @@ -71,9 +71,28 @@ required argument. If an option character is followed by two colons (@samp{::}), its argument is optional; this is a GNU extension. +@code{getopt} has three ways to deal with options that follow +non-options @var{argv} elements. The special argument @samp{--} forces +in all cases the end of option scanning. + +@itemize @bullet +@item +The default is to permute the contents of @var{argv} while scanning it +so that eventually all the non-options are at the end. This allows +options to be given in any order, even with programs that were not +written to expect this. + +@item If the @var{options} argument string begins with a hyphen (@samp{-}), this is treated specially. It permits arguments that are not options to be returned as if they were associated with option character @samp{\0}. + +@item +POSIX demands the following behaviour: The first non-option stops option +processing. This mode is selected by either setting the environment +variable @code{POSIXLY_CORRECT} or beginning the @var{options} argument +string with a plus sign (@samp{+}). +@end itemize The @code{getopt} function returns the option character for the next command line option. When no more option arguments are available, it -- Andreas Jaeger SuSE Labs aj@suse.de private aj@arthur.rhein-neckar.de
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