* Fix for a problem with BSD's group ownership semantics when the user
is not in the "wheel" group.
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@ -300,7 +300,19 @@ Path createTempDir()
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while (1) {
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checkInterrupt();
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Path tmpDir = tempName();
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if (mkdir(tmpDir.c_str(), 0777) == 0) return tmpDir;
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if (mkdir(tmpDir.c_str(), 0777) == 0) {
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/* Explicitly set the group of the directory. This is to
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work around around problems caused by BSD's group
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ownership semantics (directories inherit the group of
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the parent). For instance, the group of /tmp on
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FreeBSD is "wheel", so all directories created in /tmp
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will be owned by "wheel"; but if the user is not in
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"wheel", then "tar" will fail to unpack archives that
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have the setgid bit set on directories. */
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if (chown(tmpDir.c_str(), (uid_t) -1, getegid()) != 0)
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throw SysError(format("setting group of directory `%1%'") % tmpDir);
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return tmpDir;
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}
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if (errno != EEXIST)
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throw SysError(format("creating directory `%1%'") % tmpDir);
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}
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