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Don't leave Windows 2000 behind.

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* Makefile.in (ps.exe): Revert previous change.
	* ps.cc: Include psapi.h again.
	(main): In CW_GETPINFO_FULL case.  Evaluate minimal process access mask
	required per OS and use that in OpenProcess call.  Use
	GetModuleFileNameExW on Windows 2000 or if fetching the drive mapping
	failed.  Handle empty process name.
This commit is contained in:
Corinna Vinschen 2011-12-22 13:48:05 +00:00
parent a6ae9400a7
commit 185ad82d2d
3 changed files with 72 additions and 22 deletions
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9
winsup/utils/ChangeLog
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@ -1,3 +1,12 @@
2011-12-22 Corinna Vinschen <corinna@vinschen.de>
* Makefile.in (ps.exe): Revert previous change.
* ps.cc: Include psapi.h again.
(main): In CW_GETPINFO_FULL case. Evaluate minimal process access mask
required per OS and use that in OpenProcess call. Use
GetModuleFileNameExW on Windows 2000 or if fetching the drive mapping
failed. Handle empty process name.
2011-12-22 Corinna Vinschen <corinna@vinschen.de>
* Makefile.in (ps.exe): Drop -lpsapi from ALL_LDFLAGS.

2
winsup/utils/Makefile.in
View File

@ -77,7 +77,7 @@ mount.exe: path-mount.o
cygcheck.exe: MINGW_LDFLAGS += -lntdll
cygpath.exe: ALL_LDFLAGS += -lcygwin -luserenv -lntdll
cygpath.exe: CXXFLAGS += -fno-threadsafe-statics
ps.exe: ALL_LDFLAGS += -lcygwin -lntdll
ps.exe: ALL_LDFLAGS += -lcygwin -lpsapi -lntdll
strace.exe: MINGW_LDFLAGS += -lntdll
ldd.exe: ALL_LDFLAGS += -lpsapi

83
winsup/utils/ps.cc
View File

@ -22,6 +22,7 @@ details. */
#include <limits.h>
#include <sys/cygwin.h>
#include <cygwin/version.h>
#include <psapi.h>
#include <ddk/ntapi.h>
#include <ddk/winddk.h>
#include "loadlib.h"
@ -150,6 +151,7 @@ main (int argc, char *argv[])
external_pinfo *p;
int aflag, lflag, fflag, sflag, uid, proc_id;
bool found_proc_id = true;
DWORD proc_access = PROCESS_QUERY_LIMITED_INFORMATION;
cygwin_getinfo_types query = CW_GETPINFO;
const char *dtitle = " PID TTY STIME COMMAND\n";
const char *dfmt = "%7d%4s%10s %s\n";
@ -250,12 +252,33 @@ main (int argc, char *argv[])
AdjustTokenPrivileges (tok, FALSE, &priv, 0, NULL, NULL);
}
}
/* Fetch an opaque drive mapping object from the Cygwin DLL.
This is used to map NT device paths to Win32 paths. */
drive_map = (void *) cygwin_internal (CW_ALLOC_DRIVE_MAP);
/* Check old Cygwin version. */
if (drive_map == (void *) -1)
drive_map = NULL;
/* Check process query capabilities. */
OSVERSIONINFO version;
version.dwOSVersionInfoSize = sizeof version;
GetVersionEx (&version);
if (version.dwMajorVersion <= 5) /* pre-Vista */
{
proc_access = PROCESS_QUERY_INFORMATION;
if (version.dwMinorVersion < 1) /* Windows 2000 */
proc_access |= PROCESS_VM_READ;
else
{
}
}
/* Except on Windows 2000, fetch an opaque drive mapping object from the
Cygwin DLL. This is used to map NT device paths to Win32 paths. */
if (!(proc_access & PROCESS_VM_READ))
{
drive_map = (void *) cygwin_internal (CW_ALLOC_DRIVE_MAP);
/* Check old Cygwin version. */
if (drive_map == (void *) -1)
drive_map = NULL;
/* Allow fallback to GetModuleFileNameEx for post-W2K. */
if (!drive_map)
proc_access = PROCESS_QUERY_INFORMATION | PROCESS_VM_READ;
}
}
for (int pid = 0;
@ -298,29 +321,47 @@ main (int argc, char *argv[])
if (p->process_state & PID_EXITED || (p->exitcode & ~0xffff))
strcat (pname, " <defunct>");
}
else if (query == CW_GETPINFO_FULL && drive_map)
else if (query == CW_GETPINFO_FULL)
{
HANDLE h;
NTSTATUS status;
wchar_t *win32path = NULL;
h = OpenProcess (PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
FALSE, p->dwProcessId);
h = OpenProcess (proc_access, FALSE, p->dwProcessId);
if (!h)
continue;
status = NtQueryInformationProcess (h, ProcessImageFileName, uni,
sizeof unicode_buf, NULL);
if (NT_SUCCESS (status))
/* We use NtQueryInformationProcess in the first place, because
GetModuleFileNameEx does not work on 64 bit systems when trying
to fetch module names of 64 bit processes. */
if (!(proc_access & PROCESS_VM_READ)) /* Windows 2000 */
{
/* NtQueryInformationProcess returns a native NT device path.
Call CW_MAP_DRIVE_MAP to convert the path to an ordinary
Win32 path. The returned pointer is a pointer into the
incoming buffer given as third argument. It's expected
to be big enough, which we made sure by defining unicode_buf
to have enough space for a maximum sized UNICODE_STRING. */
uni->Buffer[uni->Length / sizeof (WCHAR)] = L'\0';
win32path = (wchar_t *) cygwin_internal (CW_MAP_DRIVE_MAP,
drive_map, uni->Buffer);
status = NtQueryInformationProcess (h, ProcessImageFileName, uni,
sizeof unicode_buf, NULL);
if (NT_SUCCESS (status))
{
/* NtQueryInformationProcess returns a native NT device path.
Call CW_MAP_DRIVE_MAP to convert the path to an ordinary
Win32 path. The returned pointer is a pointer into the
incoming buffer given as third argument. It's expected
to be big enough, which we made sure by defining
unicode_buf to have enough space for a maximum sized
UNICODE_STRING. */
if (uni->Length == 0) /* System process */
win32path = L"System";
else
{
uni->Buffer[uni->Length / sizeof (WCHAR)] = L'\0';
win32path = (wchar_t *) cygwin_internal (CW_MAP_DRIVE_MAP,
drive_map,
uni->Buffer);
}
}
}
else
{
if (GetModuleFileNameExW (h, NULL, (PWCHAR) unicode_buf,
NT_MAX_PATH))
win32path = (wchar_t *) unicode_buf;
}
if (win32path)
wcstombs (pname, win32path, sizeof pname);