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boinc/lib/util.C

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// Berkeley Open Infrastructure for Network Computing
// http://boinc.berkeley.edu
// Copyright (C) 2005 University of California
//
// This is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation;
// either version 2.1 of the License, or (at your option) any later version.
//
// This software is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Lesser General Public License for more details.
//
// To view the GNU Lesser General Public License visit
// http://www.gnu.org/copyleft/lesser.html
// or write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#ifdef _WIN32
#include "boinc_win.h"
#define M_LN2 0.693147180559945309417
#endif
#ifndef _WIN32
#include <string>
#include <cstring>
#include <cstdlib>
#include <cstdio>
#include <cmath>
#include <algorithm>
#include <iterator>
#include <iostream>
#include <fstream>
#include <cctype>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
#ifdef HAVE_SYS_FILE_H
#include <sys/file.h>
#endif
#endif
#include "error_numbers.h"
#include "filesys.h"
#include "util.h"
#ifdef _USING_FCGI_
#include "fcgi_stdio.h"
#endif
using std::min;
using std::string;
#if !defined(HAVE_STRLCPY)
size_t strlcpy(char *dst, const char *src, size_t size) {
size_t ret = strlen(src);
if (size) {
size_t len = (ret >= size) ? size-1 : ret;
memcpy(dst, src, len);
dst[len] = '\0';
}
return ret;
}
#endif
#if !defined(HAVE_STRLCAT)
size_t strlcat(char *dst, const char *src, size_t size) {
size_t dst_len = strlen(dst);
size_t src_len = strlen(src);
if (size) {
size_t len = (src_len >= size-dst_len) ? (size-dst_len-1) : src_len;
memcpy(&dst[dst_len], src, len);
dst[dst_len + len] = '\0';
}
return dst_len + src_len;
}
#endif // !HAVE_STRLCAT
// Converts a double precision time (where the value of 1 represents
// a day) into a string. smallest_timescale determines the smallest
// unit of time division used
// smallest_timescale: 0=seconds, 1=minutes, 2=hours, 3=days, 4=years
//
int ndays_to_string (double x, int smallest_timescale, char *buf) {
double years, days, hours, minutes, seconds;
char year_buf[64], day_buf[16], hour_buf[16], min_buf[16], sec_buf[16];
if (x < 0 || buf == NULL) return ERR_NULL;
years = x / 365.25;
days = fmod(x, 365.25);
hours = fmod(x*24, 24);
minutes = fmod(x*24*60, 60);
seconds = fmod(x*24*60*60, 60);
if (smallest_timescale==4) {
sprintf( year_buf, "%.3f yr ", years );
} else if (years > 1 && smallest_timescale < 4) {
sprintf( year_buf, "%d yr ", (int)years );
} else {
strcpy( year_buf, "" );
}
if (smallest_timescale==3) {
sprintf( day_buf, "%.2f day%s ", days, (days>1?"s":"") );
} else if (days > 1 && smallest_timescale < 3) {
sprintf( day_buf, "%d day%s ", (int)days, (days>1?"s":"") );
} else {
strcpy( day_buf, "" );
}
if (smallest_timescale==2) {
sprintf( hour_buf, "%.2f hr ", hours );
} else if (hours > 1 && smallest_timescale < 2) {
sprintf( hour_buf, "%d hr ", (int)hours );
} else {
strcpy( hour_buf, "" );
}
if (smallest_timescale==1) {
sprintf( min_buf, "%.2f min ", minutes );
} else if (minutes > 1 && smallest_timescale < 1) {
sprintf( min_buf, "%d min ", (int)minutes );
} else {
strcpy( min_buf, "" );
}
if (smallest_timescale==0) {
sprintf( sec_buf, "%.2f sec ", seconds );
} else if (seconds > 1 && smallest_timescale < 0) {
sprintf( sec_buf, "%d sec ", (int)seconds );
} else {
strcpy( sec_buf, "" );
}
// the "-0.05" below is to prevent it from printing 60.0 sec
// when the real value is e.g. 59.91
//
sprintf(buf, "%s%s%s%s%s", year_buf, day_buf, hour_buf, min_buf, sec_buf);
return 0;
}
// Convert nbytes into a string. If total_bytes is non-zero,
// convert the two into a fractional display (i.e. 4/16 KB)
//
void nbytes_to_string(double nbytes, double total_bytes, char* str, int len) {
char buf[256];
double xTera = (1024.0*1024.0*1024.0*1024.0);
double xGiga = (1024.0*1024.0*1024.0);
double xMega = (1024.0*1024.0);
double xKilo = (1024.0);
if (total_bytes != 0) {
if (total_bytes >= xTera) {
sprintf(buf, "%0.2f/%0.2f TB", nbytes/xTera, total_bytes/xTera);
} else if (total_bytes >= xGiga) {
sprintf(buf, "%0.2f/%0.2f GB", nbytes/xGiga, total_bytes/xGiga);
} else if (total_bytes >= xMega) {
sprintf(buf, "%0.2f/%0.2f MB", nbytes/xMega, total_bytes/xMega);
} else if (total_bytes >= xKilo) {
sprintf(buf, "%0.2f/%0.2f KB", nbytes/xKilo, total_bytes/xKilo);
} else {
sprintf(buf, "%0.0f/%0.0f bytes", nbytes, total_bytes);
}
} else {
if (nbytes >= xTera) {
sprintf(buf, "%0.2f TB", nbytes/xTera);
} else if (nbytes >= xGiga) {
sprintf(buf, "%0.2f GB", nbytes/xGiga);
} else if (nbytes >= xMega) {
sprintf(buf, "%0.2f MB", nbytes/xMega);
} else if (nbytes >= xKilo) {
sprintf(buf, "%0.2f KB", nbytes/xKilo);
} else {
sprintf(buf, "%0.0f bytes", nbytes);
}
}
safe_strncpy(str, buf, len);
}
#define EPOCHFILETIME_SEC (11644473600.)
#define TEN_MILLION 10000000.
// return time of day (seconds since 1970) as a double
//
double dtime() {
#ifdef _WIN32
LARGE_INTEGER time;
FILETIME sysTime;
double t;
GetSystemTimeAsFileTime(&sysTime);
time.LowPart = sysTime.dwLowDateTime;
time.HighPart = sysTime.dwHighDateTime; // Time is in 100 ns units
t = (double)time.QuadPart; // Convert to 1 s units
t /= TEN_MILLION; /* In seconds */
t -= EPOCHFILETIME_SEC; /* Offset to the Epoch time */
return t;
#else
struct timeval tv;
gettimeofday(&tv, 0);
return tv.tv_sec + (tv.tv_usec/1.e6);
#endif
}
// do sanity check on a time, replace with now if bad
// We switched to using all UNIX times on 12/1/04.
// During the transition, times in client_state.xml may be
// in Windows (1601-based) format. Fix them here.
//
void validate_time(double& t) {
if (t==0) return;
double now = dtime();
if (t > now+86400*1000) {
t -= EPOCHFILETIME_SEC;
}
}
// sleep for a specified number of seconds
//
void boinc_sleep(double seconds) {
#ifdef _WIN32
::Sleep((int)(1000*seconds));
#else
unsigned int rem = (int) seconds;
while (1) {
rem = sleep(rem);
if (rem == 0) break;
if (rem > seconds) break; // paranoia
}
int x = (int)fmod(seconds*1000000,1000000);
if (x) usleep(x);
#endif
}
// take a string containing some space separated words.
// return an array of pointers to the null-terminated words.
// Modifies the string arg.
// Returns argc
// TODO: use strtok here
#define NOT_IN_TOKEN 0
#define IN_SINGLE_QUOTED_TOKEN 1
#define IN_DOUBLE_QUOTED_TOKEN 2
#define IN_UNQUOTED_TOKEN 3
int parse_command_line(char* p, char** argv) {
int state = NOT_IN_TOKEN;
int argc=0;
while (*p) {
switch(state) {
case NOT_IN_TOKEN:
if (isspace(*p)) {
} else if (*p == '\'') {
p++;
argv[argc++] = p;
state = IN_SINGLE_QUOTED_TOKEN;
break;
} else if (*p == '\"') {
p++;
argv[argc++] = p;
state = IN_DOUBLE_QUOTED_TOKEN;
break;
} else {
argv[argc++] = p;
state = IN_UNQUOTED_TOKEN;
}
break;
case IN_SINGLE_QUOTED_TOKEN:
if (*p == '\'') {
*p = 0;
state = NOT_IN_TOKEN;
}
break;
case IN_DOUBLE_QUOTED_TOKEN:
if (*p == '\"') {
*p = 0;
state = NOT_IN_TOKEN;
}
break;
case IN_UNQUOTED_TOKEN:
if (isspace(*p)) {
*p = 0;
state = NOT_IN_TOKEN;
}
break;
}
p++;
}
argv[argc] = 0;
return argc;
}
static char x2c(char *what) {
register char digit;
digit = (what[0] >= 'A' ? ((what[0] & 0xdf) - 'A')+10 : (what[0] - '0'));
digit *= 16;
digit += (what[1] >= 'A' ? ((what[1] & 0xdf) - 'A')+10 : (what[1] - '0'));
return(digit);
}
void c2x(char *what) {
char buf[3];
char num = atoi(what);
char d1 = num / 16;
char d2 = num % 16;
int abase1, abase2;
if (d1 < 10) abase1 = 48;
else abase1 = 55;
if (d2 < 10) abase2 = 48;
else abase2 = 55;
buf[0] = d1+abase1;
buf[1] = d2+abase2;
buf[2] = 0;
strcpy(what, buf);
}
// remove whitespace from start and end of a string
//
void strip_whitespace(char *str) {
int n;
while (1) {
if (!str[0]) break;
if (!isascii(str[0])) break;
if (!isspace(str[0])) break;
strcpy(str, str+1);
}
while (1) {
n = (int)strlen(str);
if (n == 0) break;
if (!isascii(str[n-1])) break;
if (!isspace(str[n-1])) break;
str[n-1] = 0;
}
}
void strip_whitespace(string& str) {
int n;
while (1) {
if (str.length() == 0) break;
if (!isascii(str[0])) break;
if (!isspace(str[0])) break;
str.erase(0, 1);
}
while (1) {
n = (int)str.length();
if (n == 0) break;
if (!isascii(str[n-1])) break;
if (!isspace(str[n-1])) break;
str.erase(n-1, 1);
}
}
void unescape_url(char *url) {
register int x,y;
for (x=0,y=0;url[y];++x,++y) {
if ((url[x] = url[y]) == '%') {
url[x] = x2c(&url[y+1]);
y+=2;
}
}
url[x] = '\0';
}
void escape_url(char *in, char*out) {
int x, y;
for (x=0, y=0; in[x]; ++x) {
if (isalnum(in[x])) {
out[y] = in[x];
++y;
} else {
out[y] = '%';
++y;
out[y] = 0;
char buf[256];
sprintf(buf, "%d", (char)in[x]);
c2x(buf);
strcat(out, buf);
y += 2;
}
}
out[y] = 0;
}
// Escape a URL for the project directory, cutting off the "http://",
// converting '\' '/' and ' ' to '_',
// and converting the non alphanumeric characters to %XY
// where XY is their hexadecimal equivalent
//
void escape_url_readable(char *in, char* out) {
int x, y;
char *temp;
temp = strstr(in,"://");
if (temp) {
in = temp + strlen("://");
}
for (x=0, y=0; in[x]; ++x) {
if (isalnum(in[x]) || in[x]=='.' || in[x]=='-' || in[x]=='_') {
out[y] = in[x];
++y;
} else {
out[y] = '_';
++y;
}
}
out[y] = 0;
}
// Canonicalize a master url.
// - Convert the first part of a URL (before the "//") to http://,
// or prepend it
// - Remove double slashes in the rest
// - Add a trailing slash if necessary
//
void canonicalize_master_url(char* url) {
char buf[1024];
size_t n;
char *p = strstr(url, "//");
if (p) {
strcpy(buf, p+2);
} else {
strcpy(buf, url);
}
while (1) {
p = strstr(buf, "//");
if (!p) break;
strcpy(p, p+1);
}
n = strlen(buf);
if (buf[n-1] != '/') {
strcat(buf, "/");
}
sprintf(url, "http://%s", buf);
}
bool invalid_url(char* p) {
if (strstr(p, "http://") != p) return true;
if (strlen(p) == strlen("http://")) return true;
return false;
}
void safe_strncpy(char* dst, const char* src, int len) {
strncpy(dst, src, len);
dst[len-1]=0;
}
char* time_to_string(double t) {
static char buf[100];
time_t x = (time_t)t;
struct tm* tm = localtime(&x);
strftime(buf, sizeof(buf)-1, "%Y-%m-%d %H:%M:%S", tm);
return buf;
}
// set by command line
bool debug_fake_exponential_backoff = false;
double debug_total_exponential_backoff = 0;
static int count_debug_fake_exponential_backoff = 0;
static const int max_debug_fake_exponential_backoff = 1000; // safety limit
// return a random double in the range [MIN,min(e^n,MAX))
double calculate_exponential_backoff(
const char* debug_descr, int n, double MIN, double MAX,
double factor /* = 1.0 */
) {
double rmax = min(MAX, factor*exp((double)n));
if (debug_fake_exponential_backoff) {
// For debugging/testing purposes, fake exponential back-off by
// returning 0 seconds; report arguments so we can tell what we would
// have done (this doesn't test the rand_range() functions but is
// very useful for testing backoff/retry policies).
//
double expected_backoff = (MIN > rmax) ? MIN : (rmax-MIN)/2.0;
debug_total_exponential_backoff += expected_backoff;
++count_debug_fake_exponential_backoff;
fprintf(
stderr,
"## calculate_exponential_backoff(): #%5d descr=\"%s\", n=%d, MIN=%.1f, MAX=%.1f, factor=%.1f; rand_range [%.1f,%.1f); total expected backoff=%.1f\n",
count_debug_fake_exponential_backoff,
debug_descr, n, MIN, MAX, factor,
MIN, rmax, debug_total_exponential_backoff
);
if (count_debug_fake_exponential_backoff >= max_debug_fake_exponential_backoff) {
fprintf(
stderr,
"## calculate_exponential_backoff(): reached max_debug_fake_exponential_backoff\n"
);
exit(1);
}
return 0;
}
return rand_range(MIN, rmax);
}
string timediff_format(double diff) {
char buf[256];
int tdiff = (int)diff;
int sex = tdiff % 60;
tdiff /= 60;
if (!tdiff) {
sprintf(buf, "%d seconds", sex);
return buf;
}
int min = tdiff % 60;
tdiff /= 60;
if (!tdiff) {
sprintf(buf, "%d minutes and %d seconds", min, sex);
return buf;
}
int hours = tdiff % 24;
tdiff /= 24;
if (!tdiff) {
sprintf(buf, "%d hours, %d minutes, and %d seconds", hours, min, sex);
return buf;
}
int days = tdiff % 7;
tdiff /= 7;
if (!tdiff) {
sprintf(buf, "%d days, %d hours, %d minutes, and %d seconds", days, hours, min, sex);
return buf;
}
sprintf(buf, "%d weeks, %d days, %d hours, %d minutes, and %d seconds", (int)tdiff, days, hours, min, sex);
return buf;
}
// read entire file into string
int read_file_string(const char* pathname, string& result) {
result.erase();
FILE* f;
char buf[256];
f = fopen(pathname, "r");
if (!f) return ERR_FOPEN;
while (fgets(buf, 256, f)) result += buf;
fclose(f);
return 0;
}
#ifdef WIN32
//
// FUNCTION: windows_error_string
//
// PURPOSE: copies error message text to string
//
// PARAMETERS:
// pszBuf - destination buffer
// iSize - size of buffer
//
// RETURN VALUE:
// destination buffer
//
// COMMENTS:
//
char* windows_error_string( char* pszBuf, int iSize ) {
DWORD dwRet;
LPTSTR lpszTemp = NULL;
dwRet = FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_ARGUMENT_ARRAY,
NULL,
GetLastError(),
LANG_NEUTRAL,
(LPTSTR)&lpszTemp,
0,
NULL
);
// supplied buffer is not long enough
if ( !dwRet || ( (long)iSize < (long)dwRet+14 ) ) {
pszBuf[0] = TEXT('\0');
} else {
lpszTemp[lstrlen(lpszTemp)-2] = TEXT('\0'); //remove cr and newline character
sprintf( pszBuf, TEXT("%s (0x%x)"), lpszTemp, GetLastError() );
}
if ( lpszTemp ) {
LocalFree((HLOCAL) lpszTemp );
}
return pszBuf;
}
//
// FUNCTION: windows_format_error_string
//
// PURPOSE: copies error message text to string
//
// PARAMETERS:
// dwError - the error value to look up
// pszBuf - destination buffer
// iSize - size of buffer
//
// RETURN VALUE:
// destination buffer
//
// COMMENTS:
//
char* windows_format_error_string( unsigned long dwError, char* pszBuf, int iSize )
{
DWORD dwRet;
LPTSTR lpszTemp = NULL;
dwRet = FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_ARGUMENT_ARRAY,
NULL,
dwError,
LANG_NEUTRAL,
(LPTSTR)&lpszTemp,
0,
NULL
);
// supplied buffer is not long enough
if ( !dwRet || ( (long)iSize < (long)dwRet+14 ) ) {
pszBuf[0] = TEXT('\0');
} else {
lpszTemp[lstrlen(lpszTemp)-2] = TEXT('\0'); //remove cr and newline character
sprintf( pszBuf, TEXT("%s (0x%x)"), lpszTemp, dwError );
}
if ( lpszTemp ) {
LocalFree((HLOCAL) lpszTemp );
}
return pszBuf;
}
int boinc_thread_cpu_time(HANDLE thread_handle, double& cpu) {
FILETIME creationTime, exitTime, kernelTime, userTime;
if (GetThreadTimes(
thread_handle, &creationTime, &exitTime, &kernelTime, &userTime)
) {
ULARGE_INTEGER tKernel, tUser;
LONGLONG totTime;
tKernel.LowPart = kernelTime.dwLowDateTime;
tKernel.HighPart = kernelTime.dwHighDateTime;
tUser.LowPart = userTime.dwLowDateTime;
tUser.HighPart = userTime.dwHighDateTime;
totTime = tKernel.QuadPart + tUser.QuadPart;
// Runtimes in 100-nanosecond units
cpu = totTime / 1.e7;
} else {
return -1;
}
return 0;
}
static void get_elapsed_time(double& cpu) {
static bool first = true;
static DWORD first_count = 0;
if (first) {
first_count = GetTickCount();
first = false;
}
// TODO: Handle timer wraparound
DWORD cur = GetTickCount();
cpu = ((cur - first_count)/1000.);
}
int boinc_calling_thread_cpu_time(double& cpu) {
if (boinc_thread_cpu_time(GetCurrentThread(), cpu)) {
get_elapsed_time(cpu);
}
return 0;
}
#else
int boinc_calling_thread_cpu_time(double &cpu_t) {
int retval;
struct rusage ru;
retval = getrusage(RUSAGE_SELF, &ru);
if (retval) {
fprintf(stderr, "error: could not get CPU time\n");
return ERR_GETRUSAGE;
}
// Sum the user and system time spent in this process
cpu_t = (double)ru.ru_utime.tv_sec + (((double)ru.ru_utime.tv_usec) / ((double)1000000.0));
cpu_t += (double)ru.ru_stime.tv_sec + (((double)ru.ru_stime.tv_usec) / ((double)1000000.0));
return 0;
}
#endif
// Update an estimate of "units per day" of something (credit or CPU time).
// The estimate is exponentially averaged with a given half-life
// (i.e. if no new work is done, the average will decline by 50% in this time).
// This function can be called either with new work,
// or with zero work to decay an existing average.
//
// NOTE: if you change this, also change update_average in
// html/inc/credit.inc
//
void update_average(
double work_start_time, // when new work was started
// (or zero if no new work)
double work, // amount of new work
double half_life,
double& avg, // average work per day (in and out)
double& avg_time // when average was last computed
) {
double now = dtime();
if (avg_time) {
double diff = now - avg_time;
if (diff<=0) diff=3600; // just in case
double diff_days = diff/SECONDS_PER_DAY;
double weight = exp(-diff*M_LN2/half_life);
avg *= weight;
avg += (1-weight)*(work/diff_days);
} else if (work) {
double dd = (now - work_start_time)/SECONDS_PER_DAY;
avg = work/dd;
}
avg_time = now;
}
void mysql_timestamp(double dt, char* p) {
struct tm* tmp;
time_t t = (time_t)dt;
tmp = localtime(&t); // MySQL timestamps are in local time
sprintf(p, "%4d%02d%02d%02d%02d%02d",
tmp->tm_year+1900, tmp->tm_mon+1, tmp->tm_mday,
tmp->tm_hour, tmp->tm_min, tmp->tm_sec
);
}
const char *BOINC_RCSID_ab65c90e1e = "$Id$";
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