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qemu-options: Clarify handling of commas in options parameters

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Provide explicit guidance on dealing with option parameters as arbitrary
strings containing commas, such as in "file=my,file" and "string=a,b". The
updated documentation emphasizes the need to double commas when they
appear within such parameters.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1839
Signed-off-by: Yihuan Pan <xun794@gmail.com>
Message-ID: <20231213141706.629833-2-xun794@gmail.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Yihuan Pan 2023-12-13 22:17:07 +08:00 • committed by Thomas Huth
parent 81c2c9dd5d
commit fd49b2153e
3 changed files with 14 additions and 0 deletions
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qemu-options.hx
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@ -4086,9 +4086,13 @@ DEF("fw_cfg", HAS_ARG, QEMU_OPTION_fwcfg,
SRST
``-fw_cfg [name=]name,file=file``
Add named fw\_cfg entry with contents from file file.
If the filename contains comma, you must double it (for instance,
"file=my,,file" to use file "my,file").
``-fw_cfg [name=]name,string=str``
Add named fw\_cfg entry with contents from string str.
If the string contains comma, you must double it (for instance,
"string=my,,string" to use file "my,string").
The terminating NUL character of the contents of str will not be
included as part of the fw\_cfg item data. To insert contents with