From 81c580c8664bfeeb767e2c47ea343004e88223c7 Mon Sep 17 00:00:00 2001 From: Ludovic Courtès Date: Wed, 16 Oct 2019 11:51:42 +0200 Subject: daemon: Make 'profiles/per-user' non-world-writable. Fixes . Reported at . Based on Nix commit 5a303093dcae1e5ce9212616ef18f2ca51020b0d by Eelco Dolstra . * nix/libstore/local-store.cc (LocalStore::LocalStore): Set 'perUserDir' to #o755 instead of #o1777. (LocalStore::createUser): New function. * nix/libstore/local-store.hh (LocalStore): Add it. * nix/libstore/store-api.hh (StoreAPI): Add it. * nix/nix-daemon/nix-daemon.cc (performOp): In 'wopSetOptions', add condition to handle "user-name" property and honor it. (processConnection): Add 'userId' parameter. Call 'store->createUser' when userId is not -1. * guix/profiles.scm (ensure-profile-directory): Note that this is now handled by the daemon. * guix/store.scm (current-user-name): New procedure. (set-build-options): Add #:user-name parameter and pass it to the daemon. * tests/guix-daemon.sh: Test the creation of 'profiles/per-user' when listening on a TCP socket. * tests/store.scm ("profiles/per-user exists and is not writable") ("profiles/per-user/$USER exists"): New tests. --- nix/nix-daemon/nix-daemon.cc | 24 ++++++++++++++++++++++-- 1 file changed, 22 insertions(+), 2 deletions(-) (limited to 'nix/nix-daemon') diff --git a/nix/nix-daemon/nix-daemon.cc b/nix/nix-daemon/nix-daemon.cc index 1163a249d1..3dd156ba77 100644 --- a/nix/nix-daemon/nix-daemon.cc +++ b/nix/nix-daemon/nix-daemon.cc @@ -613,6 +613,17 @@ static void performOp(bool trusted, unsigned int clientVersion, || name == "build-repeat" || name == "multiplexed-build-output") settings.set(name, value); + else if (name == "user-name" + && settings.clientUid == (uid_t) -1) { + /* Create the user profile. This is necessary if + clientUid = -1, for instance because the client + connected over TCP. */ + struct passwd *pw = getpwnam(value.c_str()); + if (pw != NULL) + store->createUser(value, pw->pw_uid); + else + printMsg(lvlInfo, format("user name %1% not found") % value); + } else settings.set(trusted ? name : "untrusted-" + name, value); } @@ -731,7 +742,7 @@ static void performOp(bool trusted, unsigned int clientVersion, } -static void processConnection(bool trusted) +static void processConnection(bool trusted, uid_t userId) { canSendStderr = false; _writeToStderr = tunnelStderr; @@ -778,6 +789,15 @@ static void processConnection(bool trusted) /* Open the store. */ store = std::shared_ptr(new LocalStore(reserveSpace)); + if (userId != (uid_t) -1) { + /* Create the user profile. */ + struct passwd *pw = getpwuid(userId); + if (pw != NULL && pw->pw_name != NULL) + store->createUser(pw->pw_name, userId); + else + printMsg(lvlInfo, format("user with UID %1% not found") % userId); + } + stopWork(); to.flush(); @@ -963,7 +983,7 @@ static void acceptConnection(int fdSocket) /* Handle the connection. */ from.fd = remote; to.fd = remote; - processConnection(trusted); + processConnection(trusted, clientUid); exit(0); }, false, "unexpected build daemon error: ", true); -- cgit v1.2.3