Add the pwd module, though it crashes on initialization

Makefile

@@ -214,6 +214,7 @@ CLANGFLAGS_RELEASE := $(CXXFLAGS_RELEASE) $(CLANG_EXTRA_FLAGS)
 
 EXT_CFLAGS := $(COMMON_CFLAGS) -fPIC -Wimplicit -O2 -I../include
 EXT_CFLAGS += -Wno-missing-field-initializers
+EXT_CFLAGS += -Wno-tautological-compare -Wno-type-limits
 ifneq ($(USE_CLANG),0)
 	EXT_CFLAGS += $(CLANG_EXTRA_FLAGS)
 endif
@@ -276,7 +277,7 @@ SRCS := $(MAIN_SRCS) $(STDLIB_SRCS)
 STDLIB_OBJS := stdlib.bc.o stdlib.stripped.bc.o
 STDLIB_RELEASE_OBJS := stdlib.release.bc.o
 
-STDMODULE_SRCS := errnomodule.c shamodule.c sha256module.c sha512module.c _math.c mathmodule.c md5.c md5module.c _randommodule.c _sre.c operator.c binascii.c $(EXTRA_STDMODULE_SRCS)
+STDMODULE_SRCS := errnomodule.c shamodule.c sha256module.c sha512module.c _math.c mathmodule.c md5.c md5module.c _randommodule.c _sre.c operator.c binascii.c pwdmodule.c $(EXTRA_STDMODULE_SRCS)
 STDOBJECT_SRCS := structseq.c $(EXTRA_STDOBJECT_SRCS)
 FROM_CPYTHON_SRCS := $(addprefix lib_python/2.7_Modules/,$(STDMODULE_SRCS)) $(addprefix lib_python/2.7_Objects/,$(STDOBJECT_SRCS)) $(wildcard src/capi/*.c)
 

src/runtime/builtin_modules/posix.cpp

@@ -68,3 +68,117 @@ void setupPosix() {
     posix_module->giveAttr("error", OSError);
 }
 }
+
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wtautological-constant-out-of-range-compare"
+#else
+#pragma GCC diagnostic ignored "-Wtype-limits"
+#endif
+// Copied from CPython/Modules/posixmodule.c:
+extern "C" {
+PyObject* _PyInt_FromUid(uid_t uid) {
+    if (uid <= LONG_MAX)
+        return PyInt_FromLong(uid);
+    return PyLong_FromUnsignedLong(uid);
+}
+
+PyObject* _PyInt_FromGid(gid_t gid) {
+    if (gid <= LONG_MAX)
+        return PyInt_FromLong(gid);
+    return PyLong_FromUnsignedLong(gid);
+}
+
+int _Py_Uid_Converter(PyObject* obj, void* p) {
+    int overflow;
+    long result;
+    if (PyFloat_Check(obj)) {
+        PyErr_SetString(PyExc_TypeError, "integer argument expected, got float");
+        return 0;
+    }
+    result = PyLong_AsLongAndOverflow(obj, &overflow);
+    if (overflow < 0)
+        goto OverflowDown;
+    if (!overflow && result == -1) {
+        /* error or -1 */
+        if (PyErr_Occurred())
+            return 0;
+        *(uid_t*)p = (uid_t)-1;
+    } else {
+        /* unsigned uid_t */
+        unsigned long uresult;
+        if (overflow > 0) {
+            uresult = PyLong_AsUnsignedLong(obj);
+            if (PyErr_Occurred()) {
+                if (PyErr_ExceptionMatches(PyExc_OverflowError))
+                    goto OverflowUp;
+                return 0;
+            }
+        } else {
+            if (result < 0)
+                goto OverflowDown;
+            uresult = result;
+        }
+        if (sizeof(uid_t) < sizeof(long) && (unsigned long)(uid_t)uresult != uresult)
+            goto OverflowUp;
+        *(uid_t*)p = (uid_t)uresult;
+    }
+    return 1;
+
+OverflowDown:
+    PyErr_SetString(PyExc_OverflowError, "user id is less than minimum");
+    return 0;
+
+OverflowUp:
+    PyErr_SetString(PyExc_OverflowError, "user id is greater than maximum");
+    return 0;
+}
+
+int _Py_Gid_Converter(PyObject* obj, void* p) {
+    int overflow;
+    long result;
+    if (PyFloat_Check(obj)) {
+        PyErr_SetString(PyExc_TypeError, "integer argument expected, got float");
+        return 0;
+    }
+    result = PyLong_AsLongAndOverflow(obj, &overflow);
+    if (overflow < 0)
+        goto OverflowDown;
+    if (!overflow && result == -1) {
+        /* error or -1 */
+        if (PyErr_Occurred())
+            return 0;
+        *(gid_t*)p = (gid_t)-1;
+    } else {
+        /* unsigned gid_t */
+        unsigned long uresult;
+        if (overflow > 0) {
+            uresult = PyLong_AsUnsignedLong(obj);
+            if (PyErr_Occurred()) {
+                if (PyErr_ExceptionMatches(PyExc_OverflowError))
+                    goto OverflowUp;
+                return 0;
+            }
+        } else {
+            if (result < 0)
+                goto OverflowDown;
+            uresult = result;
+        }
+        if (sizeof(gid_t) < sizeof(long) && (unsigned long)(gid_t)uresult != uresult)
+            goto OverflowUp;
+        *(gid_t*)p = (gid_t)uresult;
+    }
+    return 1;
+
+OverflowDown:
+    PyErr_SetString(PyExc_OverflowError, "group id is less than minimum");
+    return 0;
+
+OverflowUp:
+    PyErr_SetString(PyExc_OverflowError, "group id is greater than maximum");
+    return 0;
+}
+}
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif

src/runtime/types.cpp

@@ -43,6 +43,7 @@ extern "C" void init_sre();
 extern "C" void initmath();
 extern "C" void initoperator();
 extern "C" void initbinascii();
+extern "C" void initpwd();
 
 namespace pyston {
 
@@ -966,6 +967,7 @@ void setupRuntime() {
     initmath();
     initoperator();
     initbinascii();
+    initpwd();
 
     setupSysEnd();
 

test/tests/pwd_test.py

+import pwd
+import os
+print pwd.getpwuid(os.getuid())[5] == os.environ["HOME"]