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Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>
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If libxlu_cfg_y.y encountered a config file error, the code generated
by bison would sometimes _both_ run the %destructor _and_ call
xlu__cfg_set_store for the same XLU_ConfigSetting* semantic value.
The result would be a double free.
This appears to be because of the use of a mid-rule action. There is
some discussion of the problems with destructors and mid-rule action
error handling in "(bison)Mid-Rule Actions". This area is complex and
best avoided.
So fix the bug by abolishing the use of a mid-rule action, which was
in any case not necessary here.
Also while we are there rename the nonterminal rule "setting" to
"assignment", to avoid confusion with the token type "setting", which
had an identically name in a different namespace. This was especially
confusing because the nonterminal "setting" did not have "setting" as
the type of its semantic value! (In fact the nonterminal, now called
"assignment", does not have a value so it does not have a value type.)
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>
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Commit exactly the results of running
find \! -iname '*.txt' -type f -print0 | xargs -0 perl -p -i.bak -E 's/\s+\n/\n/'
Signed-off-by: Wei Liu <liuw@liuw.name>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed: Ian Jackson <ian.jackson@eu.citrix.com>
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Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Committed-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
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This provides a replacement config file parser for "xl" based on bison
and flex.
Benefits:
* proper error reporting with line numbers
* parser can understand nearly all "xm" configuration files directly
(doesn't understand Python code but should do everything else)
* parser also understands the ;-infested "xl" style files
* removes the dependency on libconfig
* better checking for certain kinds of mistakes
* eliminates the strange "massage file and try again" code
This is intended to support all config files currently supported by
"xl" and almost all files supported by "xm". (NB that whether a
feature works depends on the implementation of that feature in
xl/libxl of course.)
This patch also introduces a new library "libxlutil" which is mainly
for the benefit of "xl". Users of libxl do not need to use libxlutil,
but they can do so if they want to parse "xl" files without being
"xl".
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Vincent Hanquez <vincent.hanquez@eu.citrix.com>
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