[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:  highest      |         Milestone:  1.5.0
Component:  Library API  |           Version:  git master
 Severity:  normal       |        Resolution:
 Keywords:               |        Blocked By:
 Blocking:               |  Operating System:  All
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Comment (by Olly Betts):

 Checking POSIX, that makes fewer guarantees than the Linux man pages
 https://pubs.opengroup.org/onlinepubs/9699919799/functions/getenv.html :

 > The returned string pointer might be invalidated or the string content
 might be overwritten by a subsequent call to `getenv()` [...]

 So if the application is threaded and calls `getenv()` on another thread
 concurrently with us calling `getenv()`, the string returned to us could
 be invalidated or overwritten.
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Ticket URL: <https://trac.xapian.org/ticket/665#comment:23>
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