Issue #13979: Fix ctypes.util.find_library ldconfig regex

Lib/ctypes/util.py

@@ -171,22 +171,6 @@ elif os.name == "posix":
 
     else:
 
-        def _findLib_ldconfig(name):
-            # XXX assuming GLIBC's ldconfig (with option -p)
-            expr = r'/[^\(\)\s]*lib%s\.[^\(\)\s]*' % re.escape(name)
-            with contextlib.closing(os.popen('/sbin/ldconfig -p 2>/dev/null')) as f:
-                data = f.read()
-            res = re.search(expr, data)
-            if not res:
-                # Hm, this works only for libs needed by the python executable.
-                cmd = 'ldd %s 2>/dev/null' % sys.executable
-                with contextlib.closing(os.popen(cmd)) as f:
-                    data = f.read()
-                res = re.search(expr, data)
-                if not res:
-                    return None
-            return res.group(0)
-
         def _findSoname_ldconfig(name):
             import struct
             if struct.calcsize('l') == 4:
@@ -203,8 +187,7 @@ elif os.name == "posix":
             abi_type = mach_map.get(machine, 'libc6')
 
             # XXX assuming GLIBC's ldconfig (with option -p)
-            expr = r'(\S+)\s+\((%s(?:, OS ABI:[^\)]*)?)\)[^/]*(/[^\(\)\s]*lib%s\.[^\(\)\s]*)' \
+            expr = r'\s+(lib%s\.[^\s]+)\s+\(%s' % (re.escape(name), abi_type)
-                   % (abi_type, re.escape(name))
             with contextlib.closing(os.popen('LC_ALL=C LANG=C /sbin/ldconfig -p 2>/dev/null')) as f:
                 data = f.read()
             res = re.search(expr, data)

Misc/NEWS

@@ -113,6 +113,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #13979: A bug in ctypes.util.find_library that caused
+  the wrong library name to be returned has been fixed.
+
 - Issue #13993: HTMLParser is now able to handle broken end tags when
   strict=False.