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check waitpid() return value before setting exitStatus

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This fixes a race with parallelBuild on DragonFly BSD.
This commit is contained in:
Johannes Hofmann 2016-12-02 22:24:42 +01:00
commit b453a8e616
1 changed files with 1 additions and 1 deletions
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2
lib/pure/osproc.nim
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@ -965,7 +965,7 @@ elif not defined(useNimRtl):
var ret : int
var status : cint = 1
ret = waitpid(p.id, status, WNOHANG)
if WIFEXITED(status):
if ret == int(p.id) and WIFEXITED(status):
p.exitStatus = status
if ret == 0: return true # Can't establish status. Assume running.
result = ret == int(p.id)