-/* $Cambridge: exim/src/OS/os.c-cygwin,v 1.1 2004/10/06 15:07:39 ph10 Exp $ */
-
/*************************************************
* Exim - an Internet mail transport agent *
*************************************************/
-/* Cygwin-specific code. December 2002
- This is concatenated onto the generic src/os.c file.
+/* Cygwin-specific code. December 2002. Updated Jan 2015.
+ This is prefixed to the src/os.c file.
This code was supplied by Pierre A. Humblet <Pierre.Humblet@ieee.org>
*/
return mkdir(p, mode);
}
-/* We have strsignal but cannot use #define
- because types don't match */
-#define OS_STRSIGNAL /* src/os.c need not provide it */
-char * os_strsignal(int sig)
-{
- return (char *) strsignal(sig);
-}
-
#ifndef COMPILE_UTILITY /* Utilities don't need special code */
-#ifdef INCLUDE_MINIRES
-#include "../minires/minires.c"
-#include "../minires/os-interface.c"
-#endif
#ifdef INCLUDE_PAM
#include "../pam/pam.c"
#endif
+#include <alloca.h>
unsigned int cygwin_WinVersion;
#endif
#include <windows.h>
+#include <ntstatus.h>
+#include <lmcons.h>
+
+#define EqualLuid(Luid1, Luid2) \
+ ((Luid1.LowPart == Luid2.LowPart) && (Luid1.HighPart == Luid2.HighPart))
#include <sys/cygwin.h>
/* Special static variables */
static BOOL cygwin_debug = FALSE;
-static int privileged = 1; /* when not privileged, setuid = noop */
+static int fakesetugid = 1; /* when not privileged, setugid = noop */
#undef setuid
int cygwin_setuid(uid_t uid )
{
- int res;
- if (privileged <= 0) return 0;
- else {
+ int res = 0;
+ if (fakesetugid == 0) {
res = setuid(uid);
if (cygwin_debug)
- fprintf(stderr, "setuid %lu %lu %d pid: %d\n",
+ fprintf(stderr, "setuid %u %u %d pid: %d\n",
uid, getuid(),res, getpid());
}
return res;
#undef setgid
int cygwin_setgid(gid_t gid )
{
- int res;
- if (privileged <= 0) return 0;
- else {
+ int res = 0;
+ if (fakesetugid == 0) {
res = setgid(gid);
if (cygwin_debug)
- fprintf(stderr, "setgid %lu %lu %d pid: %d\n",
- gid, getgid(), res, getpid());
+ fprintf(stderr, "setgid %u %u %d pid: %d\n",
+ gid, getgid(), res, getpid());
}
return res;
}
/* Background processes run at lower priority */
-static void setpriority()
+static void cygwin_setpriority()
{
if (!SetPriorityClass(GetCurrentProcess(), BELOW_NORMAL_PRIORITY_CLASS))
SetPriorityClass(GetCurrentProcess(), IDLE_PRIORITY_CLASS);
Next byte: 0
Next byte: minor version of OS
Low byte: major version of OS (3 or 4 for for NT, 5 for 2000 and XP) */
-#define VERSION_IS_58M(x) (x & 0x80000000) /* 95, 98, Me */
-#define VERSION_IS_NT(x) ((x & 0XFF) < 5) /* NT 4 or 3.51 */
+//#define VERSION_IS_58M(x) (x & 0x80000000) /* 95, 98, Me */
+//#define VERSION_IS_NT(x) ((x & 0XFF) < 5) /* NT 4 or 3.51 */
/*
Routine to find if process or thread is privileged
enum {
CREATE_BIT = 1,
- RESTORE_BIT = 2
};
static DWORD get_privileges ()
&& LookupPrivilegeValue (NULL, SE_CREATE_TOKEN_NAME, &cluid)
&& LookupPrivilegeValue(NULL, SE_RESTORE_NAME, &rluid)
&& (GetTokenInformation( hToken, TokenPrivileges,
- privs, sizeof (buffer), &length)
- || (GetLastError () == ERROR_INSUFFICIENT_BUFFER
- && (privs = (PTOKEN_PRIVILEGES) alloca (length))
- && GetTokenInformation(hToken, TokenPrivileges,
- privs, length, &length)))) {
+ privs, sizeof (buffer), &length)
+ || (GetLastError () == ERROR_INSUFFICIENT_BUFFER
+ && (privs = (PTOKEN_PRIVILEGES) alloca (length))
+ && GetTokenInformation(hToken, TokenPrivileges,
+ privs, length, &length)))) {
for (i = 0; i < privs->PrivilegeCount; i++) {
- if (privs->Privileges[i].Luid.QuadPart == cluid.QuadPart)
- ret |= CREATE_BIT;
- else if (privs->Privileges[i].Luid.QuadPart == rluid.QuadPart)
- ret |= RESTORE_BIT;
- else continue;
- if (ret == (CREATE_BIT | RESTORE_BIT))
- break;
+ if (EqualLuid(privs->Privileges[i].Luid, cluid))
+ ret |= CREATE_BIT;
+ if (ret == (CREATE_BIT))
+ break;
}
}
else
- fprintf(stderr, "has_create_token_privilege %ld\n", GetLastError());
+ fprintf(stderr, "has_create_token_privilege %u\n", GetLastError());
if (hToken)
CloseHandle(hToken);
return ret;
}
-/* We use a special routine to initialize
- cygwin_init is called from the OS_INIT macro in main(). */
-
-void cygwin_init(int argc, char ** argv, void * rup,
- void * eup, void * egp, void * cup)
+/*
+ We use cygwin_premain to fake a few things
+ and to provide some debug info
+*/
+void cygwin_premain2(int argc, char ** argv, struct per_process * ptr)
{
- int i;
+ int i, res, is_daemon = 0, is_spoolwritable, is_privileged, is_eximuser;
uid_t myuid, systemuid;
gid_t mygid, adminsgid;
- struct passwd * pwp;
- char *cygenv, win32_path[MAX_PATH];
+ struct passwd * pwp = NULL;
+ struct stat buf;
+ char *cygenv;
SID(1, SystemSid, SECURITY_LOCAL_SYSTEM_RID);
SID(2, AdminsSid, SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS);
DWORD priv_flags;
for (i = 1; i < argc; i++) {
if (argv[i][0] == '-') {
if (argv[i][1] == 'c') {
+ ssize_t size;
+ wchar_t *win32_path;
argv[i][1] = 'n'; /* Replace -c by -n */
cygwin_debug = TRUE;
- fprintf(stderr, "CYGWIN = \"%s\".", cygenv);
- cygwin_conv_to_win32_path("/", win32_path);
- fprintf(stderr, " Root / mapped to %s.\n", win32_path);
+ fprintf(stderr, "CYGWIN = \"%s\".\n", cygenv);
+ if (((size = cygwin_conv_path(CCP_POSIX_TO_WIN_W,"/", win32_path, 0)) > 0)
+ && ((win32_path = malloc(size)) != NULL)
+ && (cygwin_conv_path(CCP_POSIX_TO_WIN_W,"/", win32_path, size) == 0)) {
+ fprintf(stderr, " Root / mapped to %ls.\n", win32_path);
+ free(win32_path);
+ }
}
- else if (argv[i][1] == 'b' && argv[i][2] == 'd')
- setpriority();
+ else if (argv[i][1] == 'b' && argv[i][2] == 'd') {
+ is_daemon = 1;
+ cygwin_setpriority();
}
}
- if (VERSION_IS_58M(cygwin_WinVersion)) {
- * (uid_t *) rup = myuid; /* Pretend we are root */
- * (uid_t *) eup = myuid; /* ... and exim */
- * (gid_t *) egp = mygid;
- return;
}
+
/* Nt/2000/XP
- We initially set the exim uid & gid to those of the "real exim",
+ We initially set the exim uid & gid to those of the "exim user",
or to the root uid (SYSTEM) and exim gid (ADMINS),
If privileged, we setuid to those.
We always set the configure uid to the system uid.
We always set the root uid to the real uid
- to avoid useless execs following forks.
+ to allow exim imposed restrictions (bypassable by recompiling)
+ and to avoid exec that cause loss of privilege
If not privileged and unable to chown,
we set the exim uid to our uid.
- If unprivileged, we fake all subsequent setuid. */
+ If unprivileged and /var/spool/exim is writable and not runing as listening daemon,
+ we fake all subsequent setuid. */
+
+ /* Get the system and admins uid from their sids */
+ if ((systemuid = cygwin_internal(CW_GET_UID_FROM_SID, & SystemSid)) == -1) {
+ fprintf(stderr, "Cannot map System sid. Aborting\n");
+ exit(1);
+ }
+ if ((adminsgid = cygwin_internal(CW_GET_GID_FROM_SID, & AdminsSid)) == -1) {
+ fprintf(stderr, "Cannot map Admins sid. Aborting\n");
+ exit(1);
+ }
priv_flags = get_privileges ();
- privileged = !!(priv_flags & CREATE_BIT);
-
- /* Get the system and admins uid from their sids,
- or use the default values from the Makefile. */
- if ((systemuid = cygwin_internal(CW_GET_UID_FROM_SID, & SystemSid)) == -1)
- systemuid = * (uid_t *) eup;
- if ((adminsgid = cygwin_internal(CW_GET_GID_FROM_SID, & AdminsSid)) == -1)
- adminsgid = * (gid_t *) egp;
-
- if ((pwp = getpwnam("exim")) != NULL) {
- * (uid_t *) eup = pwp->pw_uid; /* Set it according to passwd */
- * (gid_t *) egp = pwp->pw_gid;
+ is_privileged = !!(priv_flags & CREATE_BIT);
+
+ /* Call getpwnam for account exim after getting the local exim name */
+ char exim_username[DNLEN + UNLEN + 2];
+ if (cygwin_internal(CW_CYGNAME_FROM_WINNAME, "exim", exim_username, sizeof exim_username) != 0)
+ pwp = getpwnam (exim_username);
+
+ /* If cannot setuid to exim or and is not the daemon (which is assumed to be
+ able to chown or to be the exim user) set the exim ugid to our ugid to avoid
+ chown failures after creating files and to be able to setuid to exim in
+ exim.c ( "privilege not needed" ). */
+ if ((is_privileged == 0) && (!is_daemon)) {
+ exim_uid = myuid;
+ exim_gid = mygid;
+ }
+ else if (pwp != NULL) {
+ exim_uid = pwp->pw_uid; /* Set it according to passwd */
+ exim_gid = pwp->pw_gid;
+ is_eximuser = 1;
}
else {
- * (uid_t *) eup = systemuid;
- * (gid_t *) egp = adminsgid;
+ exim_uid = systemuid;
+ exim_gid = adminsgid;
+ is_eximuser = 0;
}
- /* Set the configuration uid to the system uid.
- Note that exim uid is also accepted as owner of exim.conf. */
- * (uid_t *) cup = systemuid;
+ res = stat("/var/spool/exim", &buf);
+ /* Check if writable (and can be stat) */
+ is_spoolwritable = ((res == 0) && ((buf.st_mode & S_IWOTH) != 0));
- if (privileged) { /* Can setuid */
- if (cygwin_setgid(* (gid_t *) egp) /* Setuid to exim */
- || cygwin_setuid(* (uid_t *) eup))
- privileged = -1; /* Problem... Perhaps not in 544 */
+ fakesetugid = (is_privileged == 0) && (is_daemon == 0) && (is_spoolwritable == 1);
+
+ if (is_privileged) { /* Can setuid */
+ if (cygwin_setgid(exim_gid) /* Setuid to exim */
+ || cygwin_setuid(exim_uid)) {
+ fprintf(stderr, "Unable to setuid/gid to exim. priv_flags: %x\n", priv_flags);
+ exit(0); /* Problem... Perhaps not in 544 */
+ }
}
- /* Pretend we are root to avoid useless execs.
- We are limited by file access rights */
- * (uid_t *) rup = getuid ();
+ /* Set the configuration file uid and gid to the system uid and admins gid. */
+ config_uid = systemuid;
+ config_gid = adminsgid;
- /* If we have not setuid to exim and cannot chown,
- set the exim uid to our uid to avoid chown failures */
- if (privileged <= 0 && !(priv_flags & RESTORE_BIT))
- * (uid_t *) eup = * (uid_t *) rup;
+ /* Pretend we are root to avoid useless exec
+ and avoid exim set limitations.
+ We are limited by file access rights */
+ root_uid = getuid ();
if (cygwin_debug) {
- fprintf(stderr, "Starting uid %ld, gid %ld, ntsec %lu, privileged %d.\n",
- myuid, mygid, cygwin_internal(CW_CHECK_NTSEC, NULL), privileged);
- fprintf(stderr, "root_uid %ld, exim_uid %ld, exim_gid %ld, config_uid %ld.\n",
- * (uid_t *) rup, * (uid_t *) eup, * (gid_t *) egp, * (uid_t *) cup);
+ fprintf(stderr, "Starting uid %u, gid %u, priv_flags %x, is_privileged %d, is_daemon %d, is_spoolwritable %d.\n",
+ myuid, mygid, priv_flags, is_privileged, is_daemon, is_spoolwritable);
+ fprintf(stderr, "root_uid %u, exim_uid %u, exim_gid %u, config_uid %u, config_gid %u, is_eximuser %d.\n",
+ root_uid, exim_uid, exim_gid, config_uid, config_gid, is_eximuser);
}
return;
}
+#ifndef OS_LOAD_AVERAGE /* Can be set on command line */
+#define OS_LOAD_AVERAGE /* src/os.c need not provide it */
+
/*****************************************************************
- *
Functions for average load measurements
- Obtaining statistics in Windows is done at a low level by
- calling registry functions, in particular the key
- HKEY_PERFORMANCE_DATA on NT and successors.
- Something equivalent exists on Win95, see Microsoft article
- HOWTO: Access the Performance Registry Under Windows 95 (Q174631)
- but it is not implemented here.
-
- The list of objects to be polled is specified in the string
- passed to RegQueryValueEx in ReadStat() below.
- On NT, all objects are polled even if info about only one is
- required. This is fixed in Windows 2000. See articles
- INFO: Perflib Calling Close Procedure in Windows 2000 (Q270127)
- INFO: Performance Data Changes Between Windows NT 4.0 and Windows
- 2000 (Q296523)
-
- It is unclear to me how the counters are primarily identified.
- Whether it's by name strings or by the offset of their strings
- as mapped in X:\Winnt\system32\perfc009.dat [or equivalently as
- reported by the registry functions in GetNameStrings( ) below].
- Microsoft documentation seems to say that both methods should
- work.
-
- In the interest of speed and language independence, the main
- code below relies on offsets. However if debug is enabled, the
- code verifies that the names of the corresponding strings are
- as expected.
-
-*****************************************************************/
-#ifndef OS_LOAD_AVERAGE /* Can be set on command line */
-#define OS_LOAD_AVERAGE /* src/os.c need not provide it */
+ Uses NtQuerySystemInformation.
+ This requires definitions that are not part of
+ standard include files.
-/* Object and counter indices and names */
-#define PROCESSOR_OBJECT_INDEX 238
-#define PROCESSOR_OBJECT_STRING "238"
-#define PROCESSOR_OBJECT_NAME "Processor"
-#define PROCESSOR_TIME_COUNTER 6
-#define PROCESSOR_TIME_NAME "% Processor Time"
+ This is discouraged starting with WinXP.
+*************************************************************/
/* Structure to compute the load average efficiently */
+typedef struct {
+ DWORD Lock;
+ unsigned long long Time100ns; /* Last measurement time */
+ unsigned long long IdleCount; /* Latest cumulative idle time */
+ unsigned long long LastCounter; /* Last measurement counter */
+ unsigned long long PerfFreq; /* Perf counter frequency */
+ int LastLoad; /* Last reported load, or -1 */
+} cygwin_perf_t;
+
static struct {
- long long Time100ns; /* Last measurement time */
- long long IdleCount; /* Latest cumulative idle time */
- long long LastCounter; /* Last measurement counter */
- long long PerfFreq; /* Perf counter frequency */
- PPERF_DATA_BLOCK PerfData; /* Pointer to a buffer to get the data */
- DWORD BufferSize; /* Size of PerfData */
- int LastLoad; /* Last reported load, or -1 */
- LPSTR * NamesArray; /* Temporary (malloc) buffer for index */
- BOOL Init; /* True if initialized */
-} cygwin_load = { 0, 0, 0, 0, NULL, 0, 0, NULL, FALSE};
-
-#define BYTEINCREMENT 800 /* Block to add to PerfData */
+ HANDLE handle;
+ pid_t pid;
+ cygwin_perf_t *perf;
+} cygwin_load = {NULL, 0, NULL};
-/*****************************************************************
- *
- Macros to navigate through the performance data.
+#include <ntdef.h>
- *****************************************************************/
-#define FirstObject(PerfData)\
- ((PPERF_OBJECT_TYPE)((PBYTE)PerfData + PerfData->HeaderLength))
-#define NextObject(PerfObj)\
- ((PPERF_OBJECT_TYPE)((PBYTE)PerfObj + PerfObj->TotalByteLength))
-#define ObjectCounterBlock(PerfObj)\
- ((PPERF_COUNTER_BLOCK)(PBYTE)PerfObj + PerfObj->DefinitionLength )
-#define FirstInstance(PerfObj )\
- ((PPERF_INSTANCE_DEFINITION)((PBYTE)PerfObj + PerfObj->DefinitionLength))
-#define InstanceCounterBlock(PerfInst)\
- ((PPERF_COUNTER_BLOCK) ((PBYTE)PerfInst + PerfInst->ByteLength ))
-#define NextInstance(PerfInst )\
- ((PPERF_INSTANCE_DEFINITION)((PBYTE)InstanceCounterBlock(PerfInst) + \
- InstanceCounterBlock(PerfInst)->ByteLength) )
-#define FirstCounter(PerfObj)\
- ((PPERF_COUNTER_DEFINITION) ((PBYTE)PerfObj + PerfObj->HeaderLength))
-#define NextCounter(PerfCntr)\
- ((PPERF_COUNTER_DEFINITION)((PBYTE)PerfCntr + PerfCntr->ByteLength))
+typedef enum _SYSTEM_INFORMATION_CLASS
+{
+ SystemBasicInformation = 0,
+ SystemPerformanceInformation = 2,
+ SystemTimeOfDayInformation = 3,
+ SystemProcessesAndThreadsInformation = 5,
+ SystemProcessorTimes = 8,
+ SystemPagefileInformation = 18,
+ /* There are a lot more of these... */
+} SYSTEM_INFORMATION_CLASS;
+
+typedef struct _SYSTEM_BASIC_INFORMATION
+{
+ ULONG Unknown;
+ ULONG MaximumIncrement;
+ ULONG PhysicalPageSize;
+ ULONG NumberOfPhysicalPages;
+ ULONG LowestPhysicalPage;
+ ULONG HighestPhysicalPage;
+ ULONG AllocationGranularity;
+ ULONG LowestUserAddress;
+ ULONG HighestUserAddress;
+ ULONG ActiveProcessors;
+ UCHAR NumberProcessors;
+} SYSTEM_BASIC_INFORMATION, *PSYSTEM_BASIC_INFORMATION;
+
+typedef struct __attribute__ ((aligned (8))) _SYSTEM_PROCESSOR_TIMES
+{
+ LARGE_INTEGER IdleTime;
+ LARGE_INTEGER KernelTime;
+ LARGE_INTEGER UserTime;
+ LARGE_INTEGER DpcTime;
+ LARGE_INTEGER InterruptTime;
+ ULONG InterruptCount;
+} SYSTEM_PROCESSOR_TIMES, *PSYSTEM_PROCESSOR_TIMES;
+
+typedef NTSTATUS NTAPI (*NtQuerySystemInformation_t) (SYSTEM_INFORMATION_CLASS, PVOID, ULONG, PULONG);
+typedef ULONG NTAPI (*RtlNtStatusToDosError_t) (NTSTATUS);
+
+static NtQuerySystemInformation_t NtQuerySystemInformation;
+static RtlNtStatusToDosError_t RtlNtStatusToDosError;
/*****************************************************************
*
- Load the counter and object names from the registry
- to cygwin_load.NameStrings
- and index them in cygwin_load.NamesArray
-
- NameStrings seems to be taken from the file
- X:\Winnt\system32\perfc009.dat
+ LoadNtdll()
+ Load special functions from the NTDLL
+ Return TRUE if success.
- This is used only for name verification during initialization,
- if DEBUG(D_load) is TRUE.
+ *****************************************************************/
-*****************************************************************/
-static BOOL GetNameStrings( )
+static BOOL LoadNtdll()
{
- HKEY hKeyPerflib; // handle to registry key
- DWORD dwArraySize; // size for array
- DWORD dwNamesSize; // size for strings
- LPSTR lpCurrentString; // pointer for enumerating data strings
- DWORD dwCounter; // current counter index
- LONG res;
-
- /* Get the number of Counter items into dwArraySize. */
- if ((res = RegOpenKeyEx( HKEY_LOCAL_MACHINE,
- "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Perflib",
- 0,
- KEY_QUERY_VALUE, /* KEY_READ, */
- &hKeyPerflib))
- != ERROR_SUCCESS) {
- DEBUG(D_load) debug_printf("RegOpenKeyEx (1): error %ld (Windows)\n", res);
- return FALSE;
- }
- dwNamesSize = sizeof(dwArraySize); /* Temporary reuse */
- if ((res = RegQueryValueEx( hKeyPerflib,
- "Last Counter",
- NULL,
- NULL,
- (LPBYTE) &dwArraySize,
- &dwNamesSize ))
- != ERROR_SUCCESS) {
- DEBUG(D_load) debug_printf("RegQueryValueEx (1): error %ld (Windows)\n", res);
- return FALSE;
- }
- RegCloseKey( hKeyPerflib );
- /* Open the key containing the counter and object names. */
- if ((res = RegOpenKeyEx( HKEY_LOCAL_MACHINE,
- "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Perflib\\009",
- 0,
- KEY_READ,
- &hKeyPerflib))
- != ERROR_SUCCESS) {
- DEBUG(D_load) debug_printf("RegOpenKeyEx (2): error %ld (Windows)\n", res);
- return FALSE;
- }
- /* Get the size of the Counter value in the key
- and then read the value in the tail of NamesArray */
- dwNamesSize = 0;
- lpCurrentString = NULL;
- while (1) {
- res = RegQueryValueEx( hKeyPerflib,
- "Counter",
- NULL,
- NULL,
- (unsigned char *) lpCurrentString,
- &dwNamesSize);
- if ((res == ERROR_SUCCESS) && /* Bug (NT 4.0): SUCCESS was returned on first call */
- (cygwin_load.NamesArray != NULL)) break;
- if ((res == ERROR_SUCCESS) || /* but cygwin_load.NamesArrays == NULL */
- (res == ERROR_MORE_DATA)) {
- /* Allocate memory BOTH for the names array and for the counter and object names */
- if ((cygwin_load.NamesArray =
- (LPSTR *) malloc( (dwArraySize + 1) * sizeof(LPSTR) + dwNamesSize * sizeof(CHAR)))
- != NULL) {
- /* Point to area for the counter and object names */
- lpCurrentString = (LPSTR) & cygwin_load.NamesArray[dwArraySize + 1];
- continue;
- }
- DEBUG(D_load) debug_printf("Malloc: errno %d (%s)\n", errno, strerror(errno));
- }
- else { /* Serious error */
- DEBUG(D_load) debug_printf("RegQueryValueEx (2): error %ld (Windows)\n", res);
- }
- return FALSE;
- }
- RegCloseKey( hKeyPerflib );
- /* Index the names into an array. */
- while (*lpCurrentString) {
- dwCounter = atol( lpCurrentString );
- lpCurrentString += (lstrlen(lpCurrentString)+1);
- cygwin_load.NamesArray[dwCounter] = lpCurrentString;
- lpCurrentString += (strlen(lpCurrentString)+1);
- }
- return TRUE;
-}
+ HINSTANCE hinstLib;
-/*****************************************************************
- *
- Find the value of the Processor Time counter
+ if ((hinstLib = LoadLibrary("NTDLL.DLL"))
+ && (NtQuerySystemInformation =
+ (NtQuerySystemInformation_t) GetProcAddress(hinstLib,
+ "NtQuerySystemInformation"))
+ && (RtlNtStatusToDosError =
+ (RtlNtStatusToDosError_t) GetProcAddress(hinstLib,
+ "RtlNtStatusToDosError")))
+ return TRUE;
-*****************************************************************/
-static BOOL ReadTimeCtr(PPERF_OBJECT_TYPE PerfObj,
- PPERF_COUNTER_DEFINITION CurCntr,
- PPERF_COUNTER_BLOCK PtrToCntr,
- unsigned long long * TimePtr){
- int j;
- /* Scan all counters. */
- for( j = 0; j < PerfObj->NumCounters; j++ ) {
- if (CurCntr->CounterNameTitleIndex == PROCESSOR_TIME_COUNTER) {
- /* Verify it is really the proc time counter */
- if ((CurCntr->CounterType != PERF_100NSEC_TIMER_INV) || /* Wrong type */
- ((cygwin_load.NamesArray != NULL) && /* Verify name */
- (strcmp(cygwin_load.NamesArray[CurCntr->CounterNameTitleIndex],
- PROCESSOR_TIME_NAME)))) {
- log_write(0, LOG_MAIN|LOG_PANIC,
- "Incorrect Perf counter type or name %x %s",
- (unsigned) CurCntr->CounterType,
- cygwin_load.NamesArray[CurCntr->CounterNameTitleIndex]);
- return FALSE;
- }
- *TimePtr += *(unsigned long long int *) ((PBYTE) PtrToCntr + CurCntr->CounterOffset);
- return TRUE; /* return TRUE as soon as we found the counter */
- }
- /* Get the next counter. */
- CurCntr = NextCounter( CurCntr );
- }
+ DEBUG(D_load)
+ debug_printf("perf: load: %u (Windows)\n", GetLastError());
return FALSE;
}
/*****************************************************************
Return TRUE if success.
*****************************************************************/
-static BOOL ReadStat(long long int *Time100nsPtr,
- long long int * IdleCountPtr)
+
+static BOOL ReadStat(unsigned long long int *Time100nsPtr,
+ unsigned long long int *IdleCountPtr)
{
- PPERF_OBJECT_TYPE PerfObj;
- PPERF_INSTANCE_DEFINITION PerfInst;
- PPERF_COUNTER_DEFINITION PerfCntr;
- PPERF_COUNTER_BLOCK PtrToCntr;
- DWORD i, k, res;
-
- /* Get the performance data for the Processor object
- There is no need to open a key.
- We may need to blindly increase the buffer size.
- BufferSize does not return info but may be changed */
- while (1) {
- DWORD BufferSize = cygwin_load.BufferSize;
- res = RegQueryValueEx( HKEY_PERFORMANCE_DATA,
- PROCESSOR_OBJECT_STRING,
- NULL,
- NULL,
- (LPBYTE) cygwin_load.PerfData,
- &BufferSize );
- if (res == ERROR_SUCCESS) break;
- if (res == ERROR_MORE_DATA ) {
- /* Increment if necessary to get a buffer that is big enough. */
- cygwin_load.BufferSize += BYTEINCREMENT;
- if ((cygwin_load.PerfData =
- (PPERF_DATA_BLOCK) realloc( cygwin_load.PerfData, cygwin_load.BufferSize ))
- != NULL) continue;
- DEBUG(D_load) debug_printf("Malloc: errno %d (%s)\n", errno, strerror(errno));
- }
- else { /* Serious error */
- DEBUG(D_load) debug_printf("RegQueryValueEx (3): error %ld (Windows)\n", res);
- }
- return FALSE;
+ NTSTATUS ret;
+ SYSTEM_BASIC_INFORMATION sbi;
+ PSYSTEM_PROCESSOR_TIMES spt;
+
+ *Time100nsPtr = *IdleCountPtr = 0;
+
+ if ((ret = NtQuerySystemInformation(SystemBasicInformation,
+ (PVOID) &sbi, sizeof sbi, NULL))
+ != STATUS_SUCCESS) {
+ DEBUG(D_load)
+ debug_printf("Perf: NtQuerySystemInformation: %u (Windows)\n",
+ RtlNtStatusToDosError(ret));
}
- /* Initialize the counters */
- *Time100nsPtr = 0;
- *IdleCountPtr = 0;
- /* We should only have one object, but write general code just in case. */
- PerfObj = FirstObject( cygwin_load.PerfData );
- for( i = 0; i < cygwin_load.PerfData->NumObjectTypes; i++ ) {
- /* We are only interested in the processor object */
- if ( PerfObj->ObjectNameTitleIndex == PROCESSOR_OBJECT_INDEX) {
- /* Possibly verify it is really the Processor object. */
- if ((cygwin_load.NamesArray != NULL) &&
- (strcmp(cygwin_load.NamesArray[PerfObj->ObjectNameTitleIndex],
- PROCESSOR_OBJECT_NAME))) {
- log_write(0, LOG_MAIN|LOG_PANIC,
- "Incorrect Perf object name %s",
- cygwin_load.NamesArray[PerfObj->ObjectNameTitleIndex]);
- return FALSE;
- }
- /* Get the first counter */
- PerfCntr = FirstCounter( PerfObj );
- /* See if the object has instances.
- It should, but write general code. */
- if( PerfObj->NumInstances != PERF_NO_INSTANCES ) {
- PerfInst = FirstInstance( PerfObj );
- for( k = 0; k < PerfObj->NumInstances; k++ ) {
- /* There can be several processors.
- Accumulate both the Time100ns and the idle counter.
- On Win 2000 I have seen an instance named "_Total".
- Do not use it. We only use instances with a single
- character in the name.
- If we examine the object names, we also look at the instance
- names and their lengths and issue reports */
- if ( cygwin_load.NamesArray != NULL) {
- CHAR ascii[30]; /* The name is in unicode */
- wsprintf(ascii,"%.29lS",
- (char *)((PBYTE)PerfInst + PerfInst->NameOffset));
- log_write(0, LOG_MAIN,
- "Perf: Found processor instance \"%s\", length %d",
- ascii, PerfInst->NameLength);
- if ((PerfInst->NameLength != 4) &&
- (strcmp(ascii, "_Total") != 0)) {
- log_write(0, LOG_MAIN|LOG_PANIC,
- "Perf: WARNING: Unexpected processor instance name");
- return FALSE;
- }
- }
- if (PerfInst->NameLength == 4) {
- *Time100nsPtr += cygwin_load.PerfData->PerfTime100nSec.QuadPart;
- PtrToCntr = InstanceCounterBlock(PerfInst);
- if (! ReadTimeCtr(PerfObj, PerfCntr, PtrToCntr, IdleCountPtr)) {
- return FALSE;
- }
- }
- PerfInst = NextInstance( PerfInst );
- }
- return (*Time100nsPtr != 0); /* Something was read */
- }
- else { /* No instance, just the counter data */
- *Time100nsPtr = cygwin_load.PerfData->PerfTime100nSec.QuadPart;
- PtrToCntr = ObjectCounterBlock(PerfObj);
- return ReadTimeCtr(PerfObj, PerfCntr, PtrToCntr, IdleCountPtr);
- }
+ else if (!(spt = (PSYSTEM_PROCESSOR_TIMES) alloca(sizeof(spt[0]) * sbi.NumberProcessors))) {
+ DEBUG(D_load)
+ debug_printf("Perf: alloca: errno %d (%s)\n", errno, strerror(errno));
+ }
+ else if ((ret = NtQuerySystemInformation(SystemProcessorTimes, (PVOID) spt,
+ sizeof spt[0] * sbi.NumberProcessors, NULL))
+ != STATUS_SUCCESS) {
+ DEBUG(D_load)
+ debug_printf("Perf: NtQuerySystemInformation: %u (Windows)\n",
+ RtlNtStatusToDosError(ret));
+ }
+ else {
+ int i;
+ for (i = 0; i < sbi.NumberProcessors; i++) {
+ *Time100nsPtr += spt[i].KernelTime.QuadPart;;
+ *Time100nsPtr += spt[i].UserTime.QuadPart;
+ *IdleCountPtr += spt[i].IdleTime.QuadPart;
}
- PerfObj = NextObject( PerfObj );
+ return TRUE;
}
- return FALSE; /* Did not find the Processor object */
+ return FALSE;
}
/*****************************************************************
*
InitLoadAvg()
- Initialize the cygwin_load structure.
- and set cygwin_load.Flag to TRUE if successful.
+ Initialize the cygwin_load.perf structure.
+ and set cygwin_load.perf->Flag to TRUE if successful.
This is called the first time os_getloadavg is called
*****************************************************************/
-static void InitLoadAvg()
+static void InitLoadAvg(cygwin_perf_t *this)
{
BOOL success = TRUE;
- cygwin_load.Init = TRUE; /* We have run */
+
/* Get perf frequency and counter */
- QueryPerformanceFrequency((LARGE_INTEGER *)& cygwin_load.PerfFreq);
- QueryPerformanceCounter((LARGE_INTEGER *)& cygwin_load.LastCounter);
- DEBUG(D_load) {
- /* Get the name strings through the registry
- to verify that the object and counter numbers
- have the names we expect */
- success = GetNameStrings();
- }
- /* Get initial values for Time100ns and IdleCount
- and possibly verify the names */
- // success = success &&
- success = ReadStat( & cygwin_load.Time100ns,
- & cygwin_load.IdleCount);
+ QueryPerformanceFrequency((LARGE_INTEGER *)& this->PerfFreq);
+ QueryPerformanceCounter((LARGE_INTEGER *)& this->LastCounter);
+
+ /* Get initial values for Time100ns and IdleCount */
+ success = success
+ && ReadStat( & this->Time100ns,
+ & this->IdleCount);
/* If success, set the Load to 0, else to -1 */
- if (success) cygwin_load.LastLoad = 0;
+ if (success) this->LastLoad = 0;
else {
log_write(0, LOG_MAIN, "Cannot obtain Load Average");
- cygwin_load.LastLoad = -1;
- }
- /* Free the buffer created for debug name verification */
- if (cygwin_load.NamesArray != NULL) {
- free(cygwin_load.NamesArray);
- cygwin_load.NamesArray = NULL;
+ this->LastLoad = -1;
}
}
+
+
/*****************************************************************
*
os_getloadavg()
The first time we are called we initialize the counts
and return 0 or -1.
- The load cannot be measured because we use the processor 100%
+ The initial load cannot be measured as we use the processor 100%
*****************************************************************/
+static SECURITY_ATTRIBUTES sa = {sizeof (SECURITY_ATTRIBUTES), NULL, TRUE};
#define AVERAGING 10
+
int os_getloadavg()
{
- long long Time100ns, IdleCount, CurrCounter;
+ unsigned long long Time100ns, IdleCount, CurrCounter;
int value;
+ pid_t newpid;
+
+ /* New process.
+ Reload the dlls and the file mapping */
+ if ((newpid = getpid()) != cygwin_load.pid) {
+ BOOL new;
+ cygwin_load.pid = newpid;
+
+ if (!LoadNtdll()) {
+ log_write(0, LOG_MAIN, "Cannot obtain Load Average");
+ cygwin_load.perf = NULL;
+ return -1;
+ }
+
+ if ((new = !cygwin_load.handle)) {
+ cygwin_load.handle = CreateFileMapping (INVALID_HANDLE_VALUE, &sa, PAGE_READWRITE,
+ 0, sizeof(cygwin_perf_t), NULL);
+ DEBUG(D_load)
+ debug_printf("Perf: CreateFileMapping: handle %p\n", (void *) cygwin_load.handle);
+ }
+ cygwin_load.perf = (cygwin_perf_t *) MapViewOfFile (cygwin_load.handle,
+ FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, 0);
+ DEBUG(D_load)
+ debug_printf("Perf: MapViewOfFile: addr %p\n", (void *) cygwin_load.perf);
+ if (new && cygwin_load.perf)
+ InitLoadAvg(cygwin_load.perf);
+ }
+
+ /* Check if initialized OK */
+ if (!cygwin_load.perf || cygwin_load.perf->LastLoad < 0)
+ return -1;
+
+ /* If we cannot get the lock, we return 0.
+ This is to prevent any lock-up possibility.
+ Finding a lock busy is unlikely, and giving up only
+ results in an immediate delivery .*/
+
+ if (InterlockedCompareExchange(&cygwin_load.perf->Lock, 1, 0)) {
+ DEBUG(D_load)
+ debug_printf("Perf: Lock busy\n");
+ return 0;
+ }
- if (! cygwin_load.Init) InitLoadAvg();
- else if (cygwin_load.LastLoad >= 0) { /* Initialized OK */
/* Get the current time (PerfCounter) */
QueryPerformanceCounter((LARGE_INTEGER *)& CurrCounter);
/* Calls closer than AVERAGING sec apart use the previous value */
- if (CurrCounter - cygwin_load.LastCounter >
- AVERAGING * cygwin_load.PerfFreq) {
+ if (CurrCounter - cygwin_load.perf->LastCounter >
+ AVERAGING * cygwin_load.perf->PerfFreq) {
/* Get Time100ns and IdleCount */
if (ReadStat( & Time100ns, & IdleCount)) { /* Success */
- /* Return processor load on 1000 scale */
- value = 1000 - ((1000 * (IdleCount - cygwin_load.IdleCount)) /
- (Time100ns - cygwin_load.Time100ns));
- cygwin_load.Time100ns = Time100ns;
- cygwin_load.IdleCount = IdleCount;
- cygwin_load.LastCounter = CurrCounter;
- cygwin_load.LastLoad = value;
+ /* Return processor load on 1000 scale */
+ value = 1000 - ((1000 * (IdleCount - cygwin_load.perf->IdleCount)) /
+ (Time100ns - cygwin_load.perf->Time100ns));
+ cygwin_load.perf->Time100ns = Time100ns;
+ cygwin_load.perf->IdleCount = IdleCount;
+ cygwin_load.perf->LastCounter = CurrCounter;
+ cygwin_load.perf->LastLoad = value;
+ DEBUG(D_load)
+ debug_printf("Perf: New load average %d\n", value);
}
else { /* Something bad happened.
- Refuse to measure the load anymore
- but don't bother releasing the buffer */
+ Refuse to measure the load anymore
+ but don't bother releasing the buffer */
log_write(0, LOG_MAIN, "Cannot obtain Load Average");
- cygwin_load.LastLoad = -1;
- }
+ cygwin_load.perf->LastLoad = -1;
}
}
+ else
DEBUG(D_load)
- debug_printf("Perf: load average = %d\n", cygwin_load.LastLoad);
- return cygwin_load.LastLoad;
+ debug_printf("Perf: Old load average %d\n", cygwin_load.perf->LastLoad);
+ cygwin_load.perf->Lock = 0;
+ return cygwin_load.perf->LastLoad;
}
#endif /* OS_LOAD_AVERAGE */
#endif /* COMPILE_UTILITY */
git://git.exim.org / exim.git / blobdiff