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CMake: Add sandboxing support.

This commit is contained in:
Lasse Collin 2023-10-09 18:37:32 +03:00
parent 2e2cd11535
commit 3f53870c24
1 changed files with 49 additions and 1 deletions
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50
CMakeLists.txt
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@ -10,7 +10,6 @@
# On some platforms this builds also xz and xzdec, but these are
# highly experimental and meant for testing only:
# - No large file support on those 32-bit platforms that need it
# - No sandboxing support
# - No translations
#
# Other missing things:
@ -1241,6 +1240,55 @@ if(NOT MSVC OR MSVC_VERSION GREATER_EQUAL 1900)
endif()
endif()
# Sandboxing:
# ON Use sandboxing if a supported method is available in the OS.
# OFF Disable sandboxing.
# capsicum Require Capsicum (FreeBSD >= 10.2) and fail if not found.
# pledge Require pledge(2) (OpenBSD >= 5.9) and fail if not found.
set(SUPPORTED_SANDBOX_METHODS ON OFF capsicum pledge)
set(ENABLE_SANDBOX ON CACHE STRING "Sandboxing method to use in 'xz'")
set_property(CACHE ENABLE_SANDBOX
PROPERTY STRINGS "${SUPPORTED_SANDBOX_METHODS}")
if(NOT ENABLE_SANDBOX IN_LIST SUPPORTED_SANDBOX_METHODS)
message(FATAL_ERROR "'${ENABLE_SANDBOX}' is not a supported "
"sandboxing method")
endif()
# When autodetecting, the search order is fixed and we must not find
# more than one method.
if(ENABLE_SANDBOX STREQUAL "OFF")
set(SANDBOX_FOUND ON)
else()
set(SANDBOX_FOUND OFF)
endif()
# Sandboxing: Capsicum
if(NOT SANDBOX_FOUND AND ENABLE_SANDBOX MATCHES "^ON$|^capsicum$")
check_symbol_exists(cap_rights_limit sys/capsicum.h
HAVE_CAP_RIGHTS_LIMIT)
if(HAVE_CAP_RIGHTS_LIMIT)
target_compile_definitions(xz PRIVATE HAVE_CAP_RIGHTS_LIMIT)
set(SANDBOX_FOUND ON)
endif()
endif()
# Sandboxing: pledge(2)
if(NOT SANDBOX_FOUND AND ENABLE_SANDBOX MATCHES "^ON$|^pledge$")
check_symbol_exists(pledge unistd.h HAVE_PLEDGE)
if(HAVE_PLEDGE)
target_compile_definitions(xz PRIVATE HAVE_PLEDGE)
set(SANDBOX_FOUND ON)
endif()
endif()
if(NOT SANDBOX_FOUND AND NOT ENABLE_SANDBOX MATCHES "^ON$|^OFF$")
message(SEND_ERROR "ENABLE_SANDBOX=${ENABLE_SANDBOX} was used but "
"support for the sandboxing method wasn't found.")
endif()
install(TARGETS xz
RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
COMPONENT xz)