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Diffstat (limited to 'src/OS/os.c-cygwin')
| -rw-r--r-- | src/OS/os.c-cygwin | 652 |
1 files changed, 652 insertions, 0 deletions
diff --git a/src/OS/os.c-cygwin b/src/OS/os.c-cygwin new file mode 100644 index 000000000..739605590 --- /dev/null +++ b/src/OS/os.c-cygwin @@ -0,0 +1,652 @@ +/* $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. + + This code was supplied by Pierre A. Humblet <Pierre.Humblet@ieee.org> +*/ + +/* We need a special mkdir that + allows names starting with // */ +#undef mkdir +int cygwin_mkdir( const char *path, mode_t mode ) +{ + const char * p = path; + if (*p == '/') while(*(p+1) == '/') p++; + 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 + +unsigned int cygwin_WinVersion; + +/* Conflict between Windows definitions and others */ +#ifdef NOERROR +#undef NOERROR +#endif +#ifdef DELETE +#undef DELETE +#endif + +#include <windows.h> +#include <sys/cygwin.h> + +/* Special static variables */ +static BOOL cygwin_debug = FALSE; +static int privileged = 1; /* when not privileged, setuid = noop */ + +#undef setuid +int cygwin_setuid(uid_t uid ) +{ + int res; + if (privileged <= 0) return 0; + else { + res = setuid(uid); + if (cygwin_debug) + fprintf(stderr, "setuid %lu %lu %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 { + res = setgid(gid); + if (cygwin_debug) + fprintf(stderr, "setgid %lu %lu %d pid: %d\n", + gid, getgid(), res, getpid()); + } + return res; +} + +/* Background processes run at lower priority */ +static void setpriority() +{ + if (!SetPriorityClass(GetCurrentProcess(), BELOW_NORMAL_PRIORITY_CLASS)) + SetPriorityClass(GetCurrentProcess(), IDLE_PRIORITY_CLASS); + return; +} + + +/* GetVersion() + MSB: 1 for 95/98/ME; Next 7: build number, except for 95/98/ME + 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 */ + +/* + Routine to find if process or thread is privileged +*/ + +enum { + CREATE_BIT = 1, + RESTORE_BIT = 2 +}; + +static DWORD get_privileges () +{ + char buffer[1024]; + DWORD i, length; + HANDLE hToken = NULL; + PTOKEN_PRIVILEGES privs; + LUID cluid, rluid; + DWORD ret = 0; + + privs = (PTOKEN_PRIVILEGES) buffer; + + if (OpenProcessToken (GetCurrentProcess(), TOKEN_QUERY, &hToken) + && 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)))) { + 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; + } + } + else + fprintf(stderr, "has_create_token_privilege %ld\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) +{ + int i; + uid_t myuid, systemuid; + gid_t mygid, adminsgid; + struct passwd * pwp; + char *cygenv, win32_path[MAX_PATH]; + SID(1, SystemSid, SECURITY_LOCAL_SYSTEM_RID); + SID(2, AdminsSid, SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS); + DWORD priv_flags; + + myuid = getuid(); + mygid = getgid(); + cygwin_WinVersion = GetVersion(); + if ((cygenv = getenv("CYGWIN")) == NULL) cygenv = ""; + /* Produce some debugging on stderr, + cannot yet use exim's debug functions. + Exim does not use -c and ignores -n. + Set lower priority for daemons */ + for (i = 1; i < argc; i++) { + if (argv[i][0] == '-') { + if (argv[i][1] == 'c') { + 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); + } + else if (argv[i][1] == 'b' && argv[i][2] == 'd') + 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", + 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. + If not privileged and unable to chown, + we set the exim uid to our uid. + If unprivileged, we fake all subsequent setuid. */ + + 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; + } + else { + * (uid_t *) eup = systemuid; + * (gid_t *) egp = adminsgid; + } + + /* Set the configuration uid to the system uid. + Note that exim uid is also accepted as owner of exim.conf. */ + * (uid_t *) cup = systemuid; + + 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 */ + } + + /* Pretend we are root to avoid useless execs. + We are limited by file access rights */ + * (uid_t *) rup = getuid (); + + /* 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; + + 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); + } + return; +} + +/***************************************************************** + * + 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 */ + +/* 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" + +/* Structure to compute the load average efficiently */ +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 */ + +/***************************************************************** + * + Macros to navigate through the performance data. + + *****************************************************************/ +#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)) + +/***************************************************************** + * + 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 + + This is used only for name verification during initialization, + if DEBUG(D_load) is TRUE. + +*****************************************************************/ +static BOOL GetNameStrings( ) +{ + 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; +} + +/***************************************************************** + * + Find the value of the Processor Time counter + +*****************************************************************/ +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 ); + } + return FALSE; +} +/***************************************************************** + * + ReadStat() + Measures current Time100ns and IdleCount + Return TRUE if success. + + *****************************************************************/ +static BOOL ReadStat(long long int *Time100nsPtr, + 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; + } + /* 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); + } + } + PerfObj = NextObject( PerfObj ); + } + return FALSE; /* Did not find the Processor object */ +} + +/***************************************************************** + * + InitLoadAvg() + Initialize the cygwin_load structure. + and set cygwin_load.Flag to TRUE if successful. + This is called the first time os_getloadavg is called + *****************************************************************/ +static void InitLoadAvg() +{ + 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); + /* If success, set the Load to 0, else to -1 */ + if (success) cygwin_load.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; + } +} +/***************************************************************** + * + os_getloadavg() + + Return -1 if not available; + Return the previous value if less than AVERAGING sec old. + else return the processor load on a [0 - 1000] scale. + + 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% +*****************************************************************/ +#define AVERAGING 10 +int os_getloadavg() +{ + long long Time100ns, IdleCount, CurrCounter; + int value; + + 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) { + /* 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; + } + else { /* Something bad happened. + 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; + } + } + } + DEBUG(D_load) + debug_printf("Perf: load average = %d\n", cygwin_load.LastLoad); + return cygwin_load.LastLoad; +} +#endif /* OS_LOAD_AVERAGE */ +#endif /* COMPILE_UTILITY */ |