testsuite: classify platform requirements

testsuite/profiles/cygwin.json

@@ -12,6 +12,7 @@
     "interpose": "no native interposition",
     "linux_acl": "no Linux ACL semantics",
     "linux_interpose": "no Linux interposition",
+    "linux_nss_chroot": "no Linux NSS chroot",
     "linux_xattr": "no Linux xattr semantics",
     "native_build": "no reliable patched build",
     "noatime": "no O_NOATIME",
@@ -23,6 +24,7 @@
     "search_only": "no Linux search-only fixture",
     "simd": "no SIMD test build",
     "symlink_mode": "no symlink chmod",
+    "thread_count": "no process thread count",
     "unix_listener": "no named Unix listener passing",
     "unix_socketpair": "no Unix socketpair",
     "user_namespace": "no user namespaces"

testsuite/profiles/macos.json

@@ -6,6 +6,7 @@
     "group_auth": "no Linux group-auth fixture",
     "linux_acl": "no Linux ACL semantics",
     "linux_interpose": "no Linux interposition",
+    "linux_nss_chroot": "no Linux NSS chroot",
     "linux_xattr": "no Linux xattr semantics",
     "noatime": "no O_NOATIME",
     "preallocate": "no preallocation support",

testsuite/tests/chroot-basis-forge-inner-module_test.py

@@ -36,7 +36,7 @@ import rsync_proto as rp
 PORT = 12973
 require_tcp("the pure-Python sender needs a real TCP daemon; run with --use-tcp")
 if get_testuid() != get_rootuid():
-    test_skipped("the /./ inner-module chroot regression requires root")
+    test_skipped("the /./ inner-module chroot regression requires root", capability='root')
 claim_ports(PORT)
 
 base = SCRATCHDIR / 'chroot-basis-forge'

testsuite/tests/daemon-chroot-acl_test.py

@@ -29,7 +29,8 @@ require_tcp("needs a real TCP peer address for reverse-DNS hostname ACL; "
             "run with --use-tcp")
 
 if platform.system() != 'Linux':
-    test_skipped("test is Linux-specific (uses chroot+unshare)")
+    test_skipped("test is Linux-specific (uses chroot+unshare)",
+                 capability='linux_nss_chroot')
 
 # Need CAP_SYS_CHROOT. Re-exec under a user namespace if not root.
 def _can_chroot() -> bool:
@@ -56,7 +57,8 @@ if not _can_chroot():
                      sys.executable, __file__],
                     env,
                 )
-    test_skipped("need CAP_SYS_CHROOT (root or unshare --user --map-root-user)")
+    test_skipped("need CAP_SYS_CHROOT (root or unshare --user --map-root-user)",
+                 capability='chroot')
 
 
 # Find what 127.0.0.1 reverse-resolves to.
@@ -74,7 +76,7 @@ def _client_hostname() -> str:
 
 client_hostname = _client_hostname()
 if not client_hostname or client_hostname == '127.0.0.1':
-    test_skipped("no reverse DNS for 127.0.0.1")
+    test_skipped("no reverse DNS for 127.0.0.1", capability='linux_nss_chroot')
 
 chrootdir = SCRATCHDIR / 'chroot'
 rmtree(chrootdir)

testsuite/tests/daemon-symlink-escape-matrix_test.py

@@ -62,12 +62,14 @@ PWNED = "WROTE-THROUGH-LINK\n"
 
 require_tcp("the daemon symlink-resolution flow needs a real TCP peer")
 if os.geteuid() != 0:
-    test_skipped("requires root to plant a foreign-owned symlink and serve as root")
+    test_skipped("requires root to plant a foreign-owned symlink and serve as root",
+                 capability='root')
 if not rsync_supports('--copy-dirlinks'):
     test_skipped("rsync lacks --copy-dirlinks")
 ATT = find_attacker_uid()
 if ATT is None:
-    test_skipped("no untrusted-uid user available for the cross-uid plant")
+    test_skipped("no untrusted-uid user available for the cross-uid plant",
+                 capability='cross_uid')
 
 # The 3.2.7 oracle: prefer a --rsync-bin2 peer if it differs from the build under
 # test, else the in-tree static binary. None -> degrade to the static contract.

testsuite/tests/daemon-zstd-thread-exhaustion_test.py

@@ -112,7 +112,7 @@ if thread_count(child_pid) < 0:
     c.close()
     test_skipped("counting a process's threads is unsupported on "
                  f'{sys.platform}, so a bound on the worker pool cannot be '
-                 'observed here')
+                 'observed here', capability='thread_count')
 
 observed = 0
 for _ in range(100):