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Patch [ 983775 ] Allow bdist_wininst to install for non-admin users

Browse source 
to address bugs:
[ 555812 ] installing extension w/o admin rights
[ 555810 ] removing extensions without admin rights

* When enumerating the Python versions found, also remember the HKEY
  they were found under.
* When installing, if Python was installed under HKCU, we will too.
  If Python was installed under HKLM, we check the permissions of
  the current user, and install where we can.
* The "root" key we use is a global variable - all registry setting and
  delete functions use this global rather than a hardcoded HKLM.
* A new entry is written to the install log, indicating the key we used.
  Uninstallation is based on this key.
* 'tempnam()' is used rather than 'tmpnam()' - 'tmpnam' creates a temp
  file on the root of the current drive, and if this is readonly would
  explain the 'freopen' errors occasionally reported. 'tempnam'
  creates the temp file in the %TEMP% directory.
This commit is contained in:
Mark Hammond 2004-07-02 23:53:16 +00:00
parent 59ad45689b
commit f9bfdd850c
1 changed files with 118 additions and 41 deletions
Download patch file Download diff file Expand all files Collapse all files

159
PC/bdist_wininst/install.c
View file

@ -128,6 +128,9 @@ int exe_size; /* number of bytes for exe-file portion */
char python_dir[MAX_PATH];
char pythondll[MAX_PATH];
BOOL pyc_compile, pyo_compile;
/* Either HKLM or HKCU, depending on where Python itself is registered, and
the permissions of the current user. */
HKEY hkey_root = (HKEY)-1;
BOOL success; /* Installation successfull? */
char *failure_reason = NULL;
@ -580,11 +583,19 @@ static PyObject *PyMessageBox(PyObject *self, PyObject *args)
return g_Py_BuildValue("i", rc);
}
static PyObject *GetRootHKey(PyObject *self)
{
return g_Py_BuildValue("l", hkey_root);
}
#define METH_VARARGS 0x0001
#define METH_NOARGS 0x0004
typedef PyObject *(*PyCFunction)(PyObject *, PyObject *);
PyMethodDef meth[] = {
{"create_shortcut", CreateShortcut, METH_VARARGS, NULL},
{"get_special_folder_path", GetSpecialFolderPath, METH_VARARGS, NULL},
{"get_root_hkey", (PyCFunction)GetRootHKey, METH_NOARGS, NULL},
{"file_created", FileCreated, METH_VARARGS, NULL},
{"directory_created", DirectoryCreated, METH_VARARGS, NULL},
{"message_box", PyMessageBox, METH_VARARGS, NULL},
@ -727,7 +738,7 @@ static int run_simple_script(char *script)
int rc;
char *tempname;
HINSTANCE hPython;
tempname = tmpnam(NULL);
tempname = tempnam(NULL, NULL);
freopen(tempname, "a", stderr);
freopen(tempname, "a", stdout);
@ -1320,6 +1331,11 @@ static BOOL GetOtherPythonVersion(HWND hwnd, LPSTR version)
}
#endif /* USE_OTHER_PYTHON_VERSIONS */
typedef struct _InstalledVersionInfo {
char prefix[MAX_PATH+1]; // sys.prefix directory.
HKEY hkey; // Is this Python in HKCU or HKLM?
} InstalledVersionInfo;
/*
* Fill the listbox specified by hwnd with all python versions found
@ -1342,7 +1358,7 @@ static BOOL GetPythonVersions(HWND hwnd, HKEY hkRoot, LPSTR version)
while (ERROR_SUCCESS == RegEnumKeyEx(hKey, index,
core_version, &bufsize, NULL,
NULL, NULL, NULL)) {
char subkey_name[80], vers_name[80], prefix_buf[MAX_PATH+1];
char subkey_name[80], vers_name[80];
int itemindex;
DWORD value_size;
HKEY hk;
@ -1357,14 +1373,18 @@ static BOOL GetPythonVersions(HWND hwnd, HKEY hkRoot, LPSTR version)
wsprintf(subkey_name,
"Software\\Python\\PythonCore\\%s\\InstallPath",
core_version);
value_size = sizeof(subkey_name);
if (ERROR_SUCCESS == RegOpenKeyEx(hkRoot, subkey_name, 0, KEY_READ, &hk)) {
if (ERROR_SUCCESS == RegQueryValueEx(hk, NULL, NULL, NULL, prefix_buf,
&value_size)) {
InstalledVersionInfo *ivi =
(InstalledVersionInfo *)malloc(sizeof(InstalledVersionInfo));
value_size = sizeof(ivi->prefix);
if (ivi &&
ERROR_SUCCESS == RegQueryValueEx(hk, NULL, NULL, NULL,
ivi->prefix, &value_size)) {
itemindex = SendMessage(hwnd, LB_ADDSTRING, 0,
(LPARAM)(LPSTR)vers_name);
(LPARAM)(LPSTR)vers_name);
ivi->hkey = hkRoot;
SendMessage(hwnd, LB_SETITEMDATA, itemindex,
(LPARAM)(LPSTR)strdup(prefix_buf));
(LPARAM)(LPSTR)ivi);
}
RegCloseKey(hk);
}
@ -1373,6 +1393,50 @@ static BOOL GetPythonVersions(HWND hwnd, HKEY hkRoot, LPSTR version)
return result;
}
/* Determine if the current user can write to HKEY_LOCAL_MACHINE */
BOOL HasLocalMachinePrivs()
{
HKEY hKey;
DWORD result;
static char KeyName[] =
"Software\\Microsoft\\Windows\\CurrentVersion\\Uninstall";
result = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
KeyName,
0,
KEY_CREATE_SUB_KEY,
&hKey);
if (result==0)
RegCloseKey(hKey);
return result==0;
}
// Check the root registry key to use - either HKLM or HKCU.
// If Python is installed in HKCU, then our extension also must be installed
// in HKCU - as Python won't be available for other users, we shouldn't either
// (and will fail if we are!)
// If Python is installed in HKLM, then we will also prefer to use HKLM, but
// this may not be possible - so we silently fall back to HKCU.
//
// We assume hkey_root is already set to where Python itself is installed.
void CheckRootKey(HWND hwnd)
{
if (hkey_root==HKEY_CURRENT_USER) {
; // as above, always install ourself in HKCU too.
} else if (hkey_root==HKEY_LOCAL_MACHINE) {
// Python in HKLM, but we may or may not have permissions there.
// Open the uninstall key with 'create' permissions - if this fails,
// we don't have permission.
if (!HasLocalMachinePrivs())
hkey_root = HKEY_CURRENT_USER;
} else {
MessageBox(hwnd, "Don't know Python's installation type",
"Strange", MB_OK | MB_ICONSTOP);
/* Default to wherever they can, but preferring HKLM */
hkey_root = HasLocalMachinePrivs() ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
}
}
/* Return the installation scheme depending on Python version number */
SCHEME *GetScheme(int major, int minor)
{
@ -1447,7 +1511,6 @@ SelectPythonDlgProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
case IDC_VERSIONS_LIST:
switch (HIWORD(wParam)) {
int id;
char *cp;
case LBN_SELCHANGE:
UpdateInstallDir:
PropSheet_SetWizButtons(GetParent(hwnd),
@ -1464,15 +1527,18 @@ SelectPythonDlgProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
} else {
char *pbuf;
int result;
InstalledVersionInfo *ivi;
PropSheet_SetWizButtons(GetParent(hwnd),
PSWIZB_BACK | PSWIZB_NEXT);
/* Get the python directory */
cp = (LPSTR)SendDlgItemMessage(hwnd,
ivi = (InstalledVersionInfo *)
SendDlgItemMessage(hwnd,
IDC_VERSIONS_LIST,
LB_GETITEMDATA,
id,
0);
strcpy(python_dir, cp);
hkey_root = ivi->hkey;
strcpy(python_dir, ivi->prefix);
SetDlgItemText(hwnd, IDC_PATH, python_dir);
/* retrieve the python version and pythondll to use */
result = SendDlgItemMessage(hwnd, IDC_VERSIONS_LIST,
@ -1555,15 +1621,28 @@ static BOOL OpenLogfile(char *dir)
char subkey_name[256];
static char KeyName[] =
"Software\\Microsoft\\Windows\\CurrentVersion\\Uninstall";
const char *root_name = (hkey_root==HKEY_LOCAL_MACHINE ?
"HKEY_LOCAL_MACHINE" : "HKEY_CURRENT_USER");
DWORD disposition;
result = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
/* Use Create, as the Uninstall subkey may not exist under HKCU.
Use CreateKeyEx, so we can specify a SAM specifying write access
*/
result = RegCreateKeyEx(hkey_root,
KeyName,
0,
KEY_CREATE_SUB_KEY,
&hKey);
0, /* reserved */
NULL, /* class */
0, /* options */
KEY_CREATE_SUB_KEY, /* sam */
NULL, /* security */
&hKey, /* result key */
NULL); /* disposition */
if (result != ERROR_SUCCESS) {
if (result == ERROR_ACCESS_DENIED) {
/* This should no longer be able to happen - we have already
checked if they have permissions in HKLM, and all users
should have write access to HKCU.
*/
MessageBox(GetFocus(),
"You do not seem to have sufficient access rights\n"
"on this machine to install this software",
@ -1585,6 +1664,9 @@ static BOOL OpenLogfile(char *dir)
fprintf(logfile, buffer);
fprintf(logfile, "Source: %s\n", modulename);
/* Root key must be first entry processed by uninstaller. */
fprintf(logfile, "999 Root Key: %s\n", root_name);
sprintf(subkey_name, "%s-py%d.%d", meta_name, py_major, py_minor);
result = RegCreateKeyEx(hKey, subkey_name,
@ -1723,6 +1805,8 @@ InstallFilesDlgProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
/* Strip the trailing backslash again */
python_dir[strlen(python_dir)-1] = '\0';
CheckRootKey(hwnd);
if (!OpenLogfile(python_dir))
break;
@ -1850,7 +1934,7 @@ FinishedDlgProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
if (logfile)
fprintf(logfile, "300 Run Script: [%s]%s\n", pythondll, fname);
tempname = tmpnam(NULL);
tempname = tempnam(NULL, NULL);
if (!freopen(tempname, "a", stderr))
MessageBox(GetFocus(), "freopen stderr", NULL, MB_OK);
@ -2100,7 +2184,7 @@ void DeleteRegistryKey(char *string)
if (delim)
*delim = '\0';
result = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
result = RegOpenKeyEx(hkey_root,
keyname,
0,
KEY_WRITE,
@ -2143,7 +2227,7 @@ void DeleteRegistryValue(char *string)
*value++ = '\0';
result = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
result = RegOpenKeyEx(hkey_root,
keyname,
0,
KEY_WRITE,
@ -2209,7 +2293,7 @@ BOOL Run_RemoveScript(char *line)
argv[0] = scriptname;
tempname = tmpnam(NULL);
tempname = tempnam(NULL, NULL);
if (!freopen(tempname, "a", stderr))
MessageBox(GetFocus(), "freopen stderr", NULL, MB_OK);
@ -2268,28 +2352,6 @@ int DoUninstall(int argc, char **argv)
return 1; /* Error */
}
{
DWORD result;
HKEY hKey;
static char KeyName[] =
"Software\\Microsoft\\Windows\\CurrentVersion\\Uninstall";
result = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
KeyName,
0,
KEY_CREATE_SUB_KEY,
&hKey);
if (result == ERROR_ACCESS_DENIED) {
MessageBox(GetFocus(),
"You do not seem to have sufficient access rights\n"
"on this machine to uninstall this software",
NULL,
MB_OK | MB_ICONSTOP);
return 1; /* Error */
}
RegCloseKey(hKey);
}
logfile = fopen(argv[2], "r");
if (!logfile) {
MessageBox(NULL,
@ -2332,6 +2394,7 @@ int DoUninstall(int argc, char **argv)
MB_YESNO | MB_ICONQUESTION))
return 0;
hkey_root = HKEY_LOCAL_MACHINE;
cp = "";
for (i = 0; i < nLines; ++i) {
/* Ignore duplicate lines */
@ -2339,7 +2402,21 @@ int DoUninstall(int argc, char **argv)
int ign;
cp = lines[i];
/* Parse the lines */
if (2 == sscanf(cp, "%d Made Dir: %s", &ign, &buffer)) {
if (2 == sscanf(cp, "%d Root Key: %s", &ign, &buffer)) {
if (strcmp(buffer, "HKEY_CURRENT_USER")==0)
hkey_root = HKEY_CURRENT_USER;
else {
// HKLM - check they have permissions.
if (!HasLocalMachinePrivs()) {
MessageBox(GetFocus(),
"You do not seem to have sufficient access rights\n"
"on this machine to uninstall this software",
NULL,
MB_OK | MB_ICONSTOP);
return 1; /* Error */
}
}
} else if (2 == sscanf(cp, "%d Made Dir: %s", &ign, &buffer)) {
if (MyRemoveDirectory(cp))
++nDirs;
else {