Commit bc512f0a authored by Rob Swindell's avatar Rob Swindell

Resolve race condition around temp directory creation

It's possible that isdir(temp_dir) will be false and then a mkpath()
call will fail because some other thread came in and crated the
directory at that very moment - so save errno if mkdir fails and
call isdir() again to double-check that the directory wasn't created
by someone else already.
parent 4016c0f3
Pipeline #148 passed with stage
in 9 minutes and 38 seconds
......@@ -347,8 +347,11 @@ int md(const char* inpath)
*p = '\0';
if(!isdir(path)) {
if(mkpath(path) != 0)
return errno;
if(mkpath(path) != 0) {
int result = errno;
if(!isdir(path)) // race condition: did another thread make the directory already?
return result;
return 0;
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