branch nix updated (3bfa70b -> e531520)

[Ludovic Courtès]

civodul pushed a change to branch nix
in repository guix.

      from  3bfa70b   Don't wait for PID -1
       new  909f126   Rename 'initChild' to 'runChild'.
       new  1f8456f   Use PR_SET_PDEATHSIG to ensure child cleanup
       new  8d9a0be   Remove tabs
       new  ccade8c   Get rid of unnecessary "interrupted by the user" message 
with -vvv
       new  5c84e49   Ensure we're writing to stderr in the builder
       new  7930b2c   Fix some memory leaks
       new  159b710   Shut up a Valgrind warning
       new  b499d2e   Silence some warnings on GCC 4.9
       new  66d086c   Better error message
       new  45a145c   Explicitly include required C headers
       new  7dfd3f5   Pedantry
       new  0fed5fd   libutil: Improve errmsg on readLink size mismatch.
       new  0b9c4a8   libutil: Limit readLink() error to only overflows.
       new  35605c4   Set /nix/store permission to 1737
       new  8c94a86   Doh
       new  7a7a158   Doh^2
       new  70c3d2f   Simplify printHash32
       new  8ab23f2   Simplify parseHash32
       new  638f367   Use pivot_root in addition to chroot when possible
       new  67af480   Use chroots for all derivations
       new  ba5888b   Fix typos: s/the the/the/
       new  1f595ba   Tighten permissions on chroot directories
       new  b6ecbd2   addToStore(): Take explicit name argument
       new  44f1b18   Chroot builds: Provide world-readable /nix/store
       new  64a998e   Revert /nix/store permission back to 01775
       new  715478f   Add a ‘verifyStore’ RPC
       new  e531520   Don't let unprivileged users repair paths

The 27 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
listed as "adds" were already present in the repository and have only
been added to this reference.


Summary of changes:
 nix/libstore/build.cc           |  171 ++++++++++++++++++++-------------------
 nix/libstore/gc.cc              |    6 +-
 nix/libstore/local-store.cc     |   31 ++++---
 nix/libstore/local-store.hh     |    2 +-
 nix/libstore/optimise-store.cc  |    1 +
 nix/libstore/pathlocks.cc       |    2 +-
 nix/libstore/remote-store.cc    |   17 +++-
 nix/libstore/remote-store.hh    |   29 ++++---
 nix/libstore/store-api.hh       |   24 +++---
 nix/libstore/worker-protocol.hh |    3 +-
 nix/libutil/hash.cc             |  101 +++++++-----------------
 nix/libutil/util.cc             |   62 +++++++++-----
 nix/libutil/util.hh             |    6 ++
 nix/nix-daemon/nix-daemon.cc    |   34 ++++++--
 14 files changed, 255 insertions(+), 234 deletions(-)