[Xapian-tickets] [Xapian] #665: Avoid C library functions not guaranteed to be thread-safe

[Xapian]

#665: Avoid C library functions not guaranteed to be thread-safe
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 Reporter:  Olly Betts   |             Owner:  Olly Betts
     Type:  defect       |            Status:  assigned
 Priority:  normal       |         Milestone:  2.0.0
Component:  Library API  |           Version:  git master
 Severity:  normal       |        Resolution:
 Keywords:               |        Blocked By:
 Blocking:               |  Operating System:  All
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Comment (by Olly Betts):

 It occurred to me we could perform thread-safe lookup of environment
 variables by using `fork()` and looking up the variable in the child
 process, then sending the value back to the parent (if it's a small
 integer, it could be via the exit code of the child process, otherwise
 probably via a pipe).

 This clearly has more overhead, but would be fine for e.g. a one-time
 check for `XAPIAN_DEBUG_LOG` and `XAPIAN_DEBUG_FLAGS` to initialise debug
 logging.
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Ticket URL: <https://trac.xapian.org/ticket/665#comment:25>
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