bpo-37400: pythoninfo logs getpwuid and getgrouplist (GH-14373)

test.pythoninfo now also logs pwd.getpwuid(os.getuid()) and
os.getgrouplist(). Extract also os.getrandom() test to run it first.

Lib/test/pythoninfo.py

@@ -161,6 +161,25 @@ def collect_builtins(info_add):
     info_add('builtins.float.double_format', float.__getformat__("double"))
 
 
+def collect_urandom(info_add):
+    import os
+
+    if hasattr(os, 'getrandom'):
+        # PEP 524: Check if system urandom is initialized
+        try:
+            try:
+                os.getrandom(1, os.GRND_NONBLOCK)
+                state = 'ready (initialized)'
+            except BlockingIOError as exc:
+                state = 'not seeded yet (%s)' % exc
+            info_add('os.getrandom', state)
+        except OSError as exc:
+            # Python was compiled on a more recent Linux version
+            # than the current Linux kernel: ignore OSError(ENOSYS)
+            if exc.errno != errno.ENOSYS:
+                raise
+
+
 def collect_os(info_add):
     import os
 
@@ -180,16 +199,16 @@ def collect_os(info_add):
     )
     copy_attributes(info_add, os, 'os.%s', attributes, formatter=format_attr)
 
-    call_func(info_add, 'os.cwd', os, 'getcwd')
+    call_func(info_add, 'os.getcwd', os, 'getcwd')
 
-    call_func(info_add, 'os.uid', os, 'getuid')
-    call_func(info_add, 'os.gid', os, 'getgid')
+    call_func(info_add, 'os.getuid', os, 'getuid')
+    call_func(info_add, 'os.getgid', os, 'getgid')
     call_func(info_add, 'os.uname', os, 'uname')
 
     def format_groups(groups):
         return ', '.join(map(str, groups))
 
-    call_func(info_add, 'os.groups', os, 'getgroups', formatter=format_groups)
+    call_func(info_add, 'os.getgroups', os, 'getgroups', formatter=format_groups)
 
     if hasattr(os, 'getlogin'):
         try:
@@ -202,7 +221,7 @@ def collect_os(info_add):
             info_add("os.login", login)
 
     call_func(info_add, 'os.cpu_count', os, 'cpu_count')
-    call_func(info_add, 'os.loadavg', os, 'getloadavg')
+    call_func(info_add, 'os.getloadavg', os, 'getloadavg')
 
     # Environment variables used by the stdlib and tests. Don't log the full
     # environment: filter to list to not leak sensitive information.
@@ -286,20 +305,32 @@ def collect_os(info_add):
         os.umask(mask)
         info_add("os.umask", '%03o' % mask)
 
-    if hasattr(os, 'getrandom'):
-        # PEP 524: Check if system urandom is initialized
+
+def collect_pwd(info_add):
     try:
+        import pwd
+    except ImportError:
+        return
+    import os
+
+    uid = os.getuid()
     try:
-                os.getrandom(1, os.GRND_NONBLOCK)
-                state = 'ready (initialized)'
-            except BlockingIOError as exc:
-                state = 'not seeded yet (%s)' % exc
-            info_add('os.getrandom', state)
-        except OSError as exc:
-            # Python was compiled on a more recent Linux version
-            # than the current Linux kernel: ignore OSError(ENOSYS)
-            if exc.errno != errno.ENOSYS:
-                raise
+        entry = pwd.getpwuid(uid)
+    except KeyError:
+        entry = None
+
+    info_add('pwd.getpwuid(%s)'% uid,
+             entry if entry is not None else '<KeyError>')
+
+    if entry is None:
+        # there is nothing interesting to read if the current user identifier
+        # is not the password database
+        return
+
+    if hasattr(os, 'getgrouplist'):
+        groups = os.getgrouplist(entry.pw_name, entry.pw_gid)
+        groups = ', '.join(map(str, groups))
+        info_add('os.getgrouplist', groups)
 
 
 def collect_readline(info_add):
@@ -625,31 +656,35 @@ def collect_info(info):
     info_add = info.add
 
     for collect_func in (
-        # collect_os() should be the first, to check the getrandom() status
-        collect_os,
+        # collect_urandom() must be the first, to check the getrandom() status.
+        # Other functions may block on os.urandom() indirectly and so change
+        # its state.
+        collect_urandom,
 
         collect_builtins,
+        collect_cc,
+        collect_datetime,
+        collect_decimal,
+        collect_expat,
         collect_gdb,
+        collect_gdbm,
+        collect_get_config,
         collect_locale,
+        collect_os,
         collect_platform,
+        collect_pwd,
         collect_readline,
+        collect_resource,
         collect_socket,
         collect_sqlite,
         collect_ssl,
+        collect_subprocess,
         collect_sys,
         collect_sysconfig,
+        collect_testcapi,
         collect_time,
-        collect_datetime,
         collect_tkinter,
         collect_zlib,
-        collect_expat,
-        collect_decimal,
-        collect_testcapi,
-        collect_resource,
-        collect_cc,
-        collect_gdbm,
-        collect_get_config,
-        collect_subprocess,
 
         # Collecting from tests should be last as they have side effects.
         collect_test_socket,