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cURL manpage "--cookie-jar" option misleading; how are cookie jars used?

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The cURL man page describing the use of --cookie-jar is contradictory.
It starts off talking only about *writing* cookies, leaving the reader
confused as to when cookies are *read*:

manpg> -c, --cookie-jar <file name>
manpg>
manpg> Specify to which file you want curl to write all cookies after
manpg> a completed operation. Curl writes all cookies previously read
manpg> from a specified file as well as all cookies received from
manpg> remote server(s). If no cookies are known, no file will be
manpg> written. The file will be written using the Netscape cookie
manpg> file format. If you set the file name to a single dash, "-",
manpg> the cookies will be written to stdout.

As the reader wonders how/when cookies are read, the manpage continues
to say:

manpg> This command line option will activate the cookie engine that
manpg> makes curl record and use cookies.

Use of the term "cookie engine" implies to the user that some
fully-featured machinery is going to take care of all the cookie
handling, as a GUI browser does.  Then it says the engine will "record
/and use/ cookies".  "Using" a cookie implies /reading/ it.  But the
--cookie-jar option never causes cookies to be read, does it?

manpg> Another way to activate it is to use the -b, --cookie option.

Saying "another way to..." implies that the --cookie option is an
alternative to the --cookie-jar, but I've heard that the --cookie
option is generally used *in tandem* with the --cookie-jar.

Where can I find clear documentation on this topic, with working
examples?

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cURL manpage "--cookie-jar" option misleading; how are cookie jars  used? Nomen Nescio <nobody@dizum.com> - 2015-10-04 19:04 +0200

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