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(define TMPDIR (param "_GLOBAL_TMP_DIR"))
(deny default)
; Disallow creating setuid/setgid binaries, since that
; would allow breaking build user isolation.
(deny file-write-setugid)
; Allow forking.
(allow process-fork)
; Allow reading system information like #CPUs, etc.
(allow sysctl-read)
; Allow POSIX semaphores and shared memory.
(allow ipc-posix*)
; Allow socket creation.
(allow system-socket)
; Allow sending signals within the sandbox.
(allow signal (target same-sandbox))
; Access to /tmp.
(allow file* process-exec (literal "/tmp") (subpath TMPDIR))
; Some packages like to read the system version.
(allow file-read* (literal "/System/Library/CoreServices/SystemVersion.plist"))
; Without this line clang cannot write to /dev/null, breaking some configure tests.
(allow file-read-metadata (literal "/dev"))
; Standard devices.
(allow file*
(literal "/dev/null")
(literal "/dev/random")
(literal "/dev/stdin")
(literal "/dev/stdout")
(literal "/dev/tty")
(literal "/dev/urandom")
(literal "/dev/zero")
(subpath "/dev/fd"))
; Does nothing, but reduces build noise.
(allow file* (literal "/dev/dtracehelper"))
; Allow access to zoneinfo since libSystem needs it.
(allow file-read* (subpath "/usr/share/zoneinfo"))
(allow file-read* (subpath "/usr/share/locale"))
; This is mostly to get more specific log messages when builds try to
; access something in /etc or /var.
(allow file-read-metadata
(literal "/etc")
(literal "/var")
(literal "/private/var/tmp")
)
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