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/** |
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* This file is part of the CernVM File System. |
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*/ |
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#include "repository.h" |
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#include <sys/capability.h> |
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#include <sys/prctl.h> |
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#include <unistd.h> |
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#include "publish/except.h" |
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#include "util/posix.h" |
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namespace publish { |
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void Env::DropCapabilities() { |
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int retval; |
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// Because the process has file capabilities, its dumpable state is set to |
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// false, which in turn makes the /proc/self/... files owned by root. We |
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// need to reset this to have them owned by the effective UID in order to |
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// set, e.g., uid_map/gid_map of user namespaces. |
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retval = prctl(PR_SET_DUMPABLE, 1, 0, 0, 0); |
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if (retval != 0) |
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throw EPublish("cannot clear dumpable state"); |
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cap_t caps = cap_get_proc(); |
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retval = cap_clear(caps); |
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cap_free(caps); |
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if (retval != 0) |
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throw EPublish("cannot clear process capabilities"); |
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} |
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std::string Env::GetEnterSessionDir() { |
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if (SymlinkExists("/.cvmfsenter")) |
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return ResolvePath("/.cvmfsenter"); |
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return ""; |
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} |
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} // namespace publish |
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