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path: root/src/passwd/nscd_query.c
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2016-07-13revert unrelated change that slipped into last commitRich Felker1-1/+1
2016-07-13fix regression in tcsetattr on all mips archsRich Felker1-1/+1
revert commit 8c316e9e49d37ad92c2e7493e16166a2afca419f. it was wrong and does not match how the kernel API works.
2015-06-09fix spurious errors from pwd/grp functions when nscd backend is absentRich Felker1-4/+8
for several pwd/grp functions, the only way the caller can distinguish between a successful negative result ("no such user/group") and an internal error is by clearing errno before the call and checking errno afterwards. the nscd backend support code correctly simulated a not-found response on systems where such a backend is not running, but failed to restore errno. this commit also fixed an outdated/incorrect comment.
2015-03-15avoid sending huge names as nscd passwd/group queriesRich Felker1-2/+3
overly long user/group names are potentially a DoS vector and source of other problems like partial writes by sendmsg, and not useful.
2015-03-15simplify nscd lookup code for alt passwd/group backendsRich Felker1-11/+13
previously, a sentinel value of (FILE *)-1 was used to inform the caller of __nscd_query that nscd is not in use. aside from being an ugly hack, this resulted in duplicate code paths for two logically equivalent cases: no nscd, and "not found" result from nscd. now, __nscd_query simply skips closing the socket and returns a valid FILE pointer when nscd is not in use, and produces a fake "not found" response header. the caller is then responsible for closing the socket just like it would do if it had gotten a real "not found" response.
2015-02-23support alternate backends for the passwd and group dbsJosiah Worcester1-0/+100
when we fail to find the entry in the commonly accepted files, we query a server over a Unix domain socket on /var/run/nscd/socket. the protocol used here is compatible with glibc's nscd protocol on most systems (all that use 32-bit numbers for all the protocol fields, which appears to be everything but Alpha).