2a9366ff49
a failure.
* times.cc (utimes): On NTFS with ntsec ON, change the file's
security descriptor temporarily to acquire write access if
opening the file failed.
597 lines
13 KiB
C++
597 lines
13 KiB
C++
/* times.cc
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Copyright 1996, 1997, 1998, 1999, 2000, 2001 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "winsup.h"
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#include <time.h>
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#include <sys/times.h>
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#include <sys/timeb.h>
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#include <utime.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "cygerrno.h"
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#include "perprocess.h"
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#include "security.h"
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#include "fhandler.h"
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#include "path.h"
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#include "sync.h"
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#include "sigproc.h"
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#include "pinfo.h"
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#define FACTOR (0x19db1ded53e8000LL)
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#define NSPERSEC 10000000LL
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static void __stdcall timeval_to_filetime (timeval *time, FILETIME *out);
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/* Cygwin internal */
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static unsigned long long __stdcall
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__to_clock_t (FILETIME * src, int flag)
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{
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unsigned long long total = ((unsigned long long) src->dwHighDateTime << 32) + ((unsigned)src->dwLowDateTime);
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syscall_printf ("dwHighDateTime %u, dwLowDateTime %u", src->dwHighDateTime, src->dwLowDateTime);
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/* Convert into clock ticks - the total is in 10ths of a usec. */
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if (flag)
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total -= FACTOR;
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total /= (unsigned long long) (NSPERSEC / CLOCKS_PER_SEC);
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syscall_printf ("total %08x %08x\n", (unsigned)(total>>32), (unsigned)(total));
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return total;
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}
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/* times: POSIX 4.5.2.1 */
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extern "C" clock_t
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times (struct tms * buf)
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{
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FILETIME creation_time, exit_time, kernel_time, user_time;
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DWORD ticks = GetTickCount ();
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/* Ticks is in milliseconds, convert to our ticks. Use long long to prevent
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overflow. */
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clock_t tc = (clock_t) ((long long) ticks * CLOCKS_PER_SEC / 1000);
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if (iswinnt)
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{
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GetProcessTimes (hMainProc, &creation_time, &exit_time,
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&kernel_time, &user_time);
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syscall_printf ("ticks %d, CLOCKS_PER_SEC %d", ticks, CLOCKS_PER_SEC);
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syscall_printf ("user_time %d, kernel_time %d, creation_time %d, exit_time %d",
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user_time, kernel_time, creation_time, exit_time);
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buf->tms_stime = __to_clock_t (&kernel_time, 0);
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buf->tms_utime = __to_clock_t (&user_time, 0);
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timeval_to_filetime (&myself->rusage_children.ru_stime, &kernel_time);
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buf->tms_cstime = __to_clock_t (&kernel_time, 1);
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timeval_to_filetime (&myself->rusage_children.ru_utime, &user_time);
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buf->tms_cutime = __to_clock_t (&user_time, 1);
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}
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else
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/* GetProcessTimes() does not work for non-NT versions of Windows. The
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return values are undefined, so instead just copy the ticks value
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into utime so that clock() will work properly on these systems */
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{
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buf->tms_utime = tc;
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buf->tms_stime = 0;
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buf->tms_cstime = 0;
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buf->tms_cutime = 0;
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}
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return tc;
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}
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extern "C" clock_t
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_times (struct tms * buf)
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{
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return times (buf);
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}
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/* settimeofday: BSD */
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extern "C" int
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settimeofday (const struct timeval *tv, const struct timezone *tz)
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{
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SYSTEMTIME st;
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struct tm *ptm;
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int res;
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tz = tz; /* silence warning about unused variable */
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ptm = gmtime(&tv->tv_sec);
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st.wYear = ptm->tm_year + 1900;
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st.wMonth = ptm->tm_mon + 1;
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st.wDayOfWeek = ptm->tm_wday;
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st.wDay = ptm->tm_mday;
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st.wHour = ptm->tm_hour;
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st.wMinute = ptm->tm_min;
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st.wSecond = ptm->tm_sec;
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st.wMilliseconds = tv->tv_usec / 1000;
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res = !SetSystemTime(&st);
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syscall_printf ("%d = settimeofday (%x, %x)", res, tv, tz);
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return res;
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}
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/* timezone: standards? */
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extern "C" char *
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timezone ()
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{
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#ifdef _MT_SAFE
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char *b=_reent_winsup()->timezone_buf;
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#else
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static NO_COPY char b[20] = {0};
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#endif
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tzset();
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__small_sprintf (b,"GMT%+d:%02d", (int) (-_timezone / 3600), (int) (abs(_timezone / 60) % 60));
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return b;
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}
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/* Cygwin internal */
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void __stdcall
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totimeval (struct timeval *dst, FILETIME *src, int sub, int flag)
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{
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long long x = __to_clock_t (src, flag);
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x *= (int) (1e6) / CLOCKS_PER_SEC; /* Turn x into usecs */
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x -= (long long) sub * (int) (1e6);
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dst->tv_usec = x % (long long) (1e6); /* And split */
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dst->tv_sec = x / (long long) (1e6);
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}
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/* gettimeofday: BSD */
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extern "C" int
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gettimeofday (struct timeval *p, struct timezone *z)
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{
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int res = 0;
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if (p != NULL)
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{
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FILETIME f;
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GetSystemTimeAsFileTime (&f);
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totimeval (p, &f, 0, 1);
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}
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if (z != NULL)
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{
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tzset();
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z->tz_minuteswest = _timezone / 60;
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z->tz_dsttime = _daylight;
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}
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syscall_printf ("%d = gettimeofday (%x, %x)", res, p, z);
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return res;
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}
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extern "C"
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int
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_gettimeofday (struct timeval *p, struct timezone *z)
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{
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return gettimeofday (p, z);
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}
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#if 0
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/* Work out magic constant below */
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genf ()
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{
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SYSTEMTIME s;
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FILETIME f;
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s.wYear = 1970;
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s.wMonth = 1;
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s.wDayOfWeek = 4;
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s.wDay = 1;
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s.wHour = 0;
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s.wMinute = 0;
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s.wSecond = 0;
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s.wMilliseconds = 0;
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SystemTimeToFileTime (&s, &f);
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small_printf ("FILE TIME is %08x%08x\n",
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f.dwHighDateTime,
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f.dwLowDateTime);
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}
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#endif
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/* Cygwin internal */
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void
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time_t_to_filetime (time_t time_in, FILETIME *out)
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{
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long long x = time_in * NSPERSEC + FACTOR;
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out->dwHighDateTime = x >> 32;
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out->dwLowDateTime = x;
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}
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/* Cygwin internal */
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static void __stdcall
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timeval_to_filetime (timeval *time_in, FILETIME *out)
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{
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long long x = time_in->tv_sec * NSPERSEC +
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time_in->tv_usec * (NSPERSEC/1000000) + FACTOR;
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out->dwHighDateTime = x >> 32;
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out->dwLowDateTime = x;
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}
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/* Cygwin internal */
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static timeval __stdcall
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time_t_to_timeval (time_t in)
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{
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timeval res;
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res.tv_sec = in;
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res.tv_usec = 0;
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return res;
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}
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/* Cygwin internal */
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/* Convert a Win32 time to "UNIX" format. */
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long __stdcall
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to_time_t (FILETIME *ptr)
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{
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/* A file time is the number of 100ns since jan 1 1601
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stuffed into two long words.
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A time_t is the number of seconds since jan 1 1970. */
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long rem;
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long long x = ((long long) ptr->dwHighDateTime << 32) + ((unsigned)ptr->dwLowDateTime);
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/* pass "no time" as epoch */
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if (x == 0)
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return 0;
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x -= FACTOR; /* number of 100ns between 1601 and 1970 */
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rem = x % ((long long)NSPERSEC);
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rem += (NSPERSEC / 2);
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x /= (long long) NSPERSEC; /* number of 100ns in a second */
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x += (long long) (rem / NSPERSEC);
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return x;
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}
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/* time: POSIX 4.5.1.1, C 4.12.2.4 */
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/* Return number of seconds since 00:00 UTC on jan 1, 1970 */
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extern "C"
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time_t
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time (time_t * ptr)
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{
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time_t res;
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SYSTEMTIME systemtime;
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FILETIME filetime;
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GetSystemTime (&systemtime);
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SystemTimeToFileTime (&systemtime, &filetime);
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res = to_time_t (&filetime);
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if (ptr)
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*ptr = res;
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syscall_printf ("%d = time (%x)", res, ptr);
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return res;
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}
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/*
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* localtime_r.c
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* Original Author: Adapted from tzcode maintained by Arthur David Olson.
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*
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* Converts the calendar time pointed to by tim_p into a broken-down time
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* expressed as local time. Returns a pointer to a structure containing the
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* broken-down time.
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*/
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#define SECSPERMIN 60
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#define MINSPERHOUR 60
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#define HOURSPERDAY 24
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#define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
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#define SECSPERDAY (SECSPERHOUR * HOURSPERDAY)
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#define DAYSPERWEEK 7
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#define MONSPERYEAR 12
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#define YEAR_BASE 1900
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#define EPOCH_YEAR 1970
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#define EPOCH_WDAY 4
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#define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
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#if 0 /* POSIX_LOCALTIME */
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static _CONST int mon_lengths[2][MONSPERYEAR] = {
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{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
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{31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
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};
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static _CONST int year_lengths[2] = {
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365,
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366
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};
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/*
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* Convert a time_t into a struct tm *.
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* Does NO timezone conversion.
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*/
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/* Cygwin internal */
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static struct tm * __stdcall
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corelocaltime (const time_t * tim_p)
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{
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long days, rem;
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int y;
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int yleap;
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_CONST int *ip;
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#ifdef _MT_SAFE
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struct tm &localtime_buf=_reent_winsup()->_localtime_buf;
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#else
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static NO_COPY struct tm localtime_buf = {0};
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#endif
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time_t tim = *tim_p;
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struct tm *res = &localtime_buf;
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days = ((long) tim) / SECSPERDAY;
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rem = ((long) tim) % SECSPERDAY;
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while (rem < 0)
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{
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rem += SECSPERDAY;
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--days;
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}
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while (rem >= SECSPERDAY)
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{
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rem -= SECSPERDAY;
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++days;
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}
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/* compute hour, min, and sec */
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res->tm_hour = (int) (rem / SECSPERHOUR);
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rem %= SECSPERHOUR;
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res->tm_min = (int) (rem / SECSPERMIN);
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res->tm_sec = (int) (rem % SECSPERMIN);
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/* compute day of week */
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if ((res->tm_wday = ((EPOCH_WDAY + days) % DAYSPERWEEK)) < 0)
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res->tm_wday += DAYSPERWEEK;
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/* compute year & day of year */
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y = EPOCH_YEAR;
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if (days >= 0)
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{
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for (;;)
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{
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yleap = isleap (y);
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if (days < year_lengths[yleap])
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break;
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y++;
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days -= year_lengths[yleap];
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}
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}
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else
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{
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do
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{
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--y;
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yleap = isleap (y);
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days += year_lengths[yleap];
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} while (days < 0);
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}
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res->tm_year = y - YEAR_BASE;
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res->tm_yday = days;
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ip = mon_lengths[yleap];
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for (res->tm_mon = 0; days >= ip[res->tm_mon]; ++res->tm_mon)
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days -= ip[res->tm_mon];
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res->tm_mday = days + 1;
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/* set daylight saving time flag */
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res->tm_isdst = -1;
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syscall_printf ("%d = corelocaltime (%x)", res, tim_p);
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return (res);
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}
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/* localtime: POSIX 8.1.1, C 4.12.3.4 */
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/*
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* localtime takes a time_t (which is in UTC)
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* and formats it into a struct tm as a local time.
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*/
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extern "C"
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struct tm *
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localtime (const time_t *tim_p)
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{
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time_t tim = *tim_p;
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struct tm *rtm;
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tzset();
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tim -= _timezone;
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rtm = corelocaltime (&tim);
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rtm->tm_isdst = _daylight;
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syscall_printf ("%x = localtime (%x)", rtm, tim_p);
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return rtm;
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}
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/* gmtime: C 4.12.3.3 */
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/*
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* gmtime takes a time_t (which is already in UTC)
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* and just puts it into a struct tm.
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*/
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extern "C"
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struct tm *
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gmtime (const time_t *tim_p)
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{
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time_t tim = *tim_p;
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struct tm *rtm = corelocaltime (&tim);
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/* UTC has no daylight savings time */
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rtm->tm_isdst = 0;
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syscall_printf ("%x = gmtime (%x)", rtm, tim_p);
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return rtm;
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}
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#endif /* POSIX_LOCALTIME */
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/* utimes: standards? */
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extern "C"
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int
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utimes (const char *path, struct timeval *tvp)
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{
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int res = 0;
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struct timeval tmp[2];
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path_conv win32 (path);
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PSECURITY_DESCRIPTOR sd = NULL;
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DWORD sd_size;
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if (win32.error)
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{
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set_errno (win32.error);
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syscall_printf ("-1 = utimes (%s, %x)", path, tvp);
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return -1;
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}
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/* MSDN suggests using FILE_FLAG_BACKUP_SEMANTICS for accessing
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the times of directories. FIXME: what about Win95??? */
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HANDLE h = CreateFileA (win32.get_win32 (),
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GENERIC_WRITE,
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FILE_SHARE_READ | FILE_SHARE_WRITE,
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&sec_none_nih,
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OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL | FILE_FLAG_BACKUP_SEMANTICS,
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0);
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if (h == INVALID_HANDLE_VALUE)
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{
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if ((res = GetFileAttributes (win32.get_win32 ())) != -1 &&
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(res & FILE_ATTRIBUTE_DIRECTORY))
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{
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/* What we can do with directories more? */
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res = 0;
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}
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else if (allow_ntsec && win32.has_acls ())
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{
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/* The following hack allows setting the correct filetime
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on NTFS with ntsec ON even when the file is R/O for the
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current user. This solves the `cp -p' problem and allows
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a more UNIX like behaviour. Basically we save the file's
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current security descriptor, change the file access so
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that we have write access (if possible) and if that worked
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fine, reset the old security descriptor at the end of the
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function. */
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sd_size = 4096;
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sd = (PSECURITY_DESCRIPTOR) alloca (sd_size);
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if (read_sd (win32.get_win32 (), sd, &sd_size) <= 0)
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sd = NULL;
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else if (set_file_attribute (TRUE, win32.get_win32 (), 0600))
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sd = NULL;
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else
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h = CreateFileA (win32.get_win32 (),
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GENERIC_WRITE,
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FILE_SHARE_READ | FILE_SHARE_WRITE,
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&sec_none_nih,
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OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL | FILE_FLAG_BACKUP_SEMANTICS,
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0);
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}
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else
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{
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res = -1;
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__seterrno ();
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}
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}
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if (h != INVALID_HANDLE_VALUE)
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{
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if (tvp == 0)
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{
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gettimeofday (&tmp[0], 0);
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tmp[1] = tmp[0];
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tvp = tmp;
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}
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FILETIME lastaccess;
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FILETIME lastwrite;
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timeval_to_filetime (tvp + 0, &lastaccess);
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timeval_to_filetime (tvp + 1, &lastwrite);
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debug_printf ("incoming lastaccess %08x %08x",
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tvp->tv_sec,
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tvp->tv_usec);
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// dump_filetime (lastaccess);
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// dump_filetime (lastwrite);
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/* FIXME: SetFileTime needs a handle with a write lock
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on the file whose time is being modified. So calls to utime()
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fail for read only files. */
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|
|
if (!SetFileTime (h, 0, &lastaccess, &lastwrite))
|
|
{
|
|
__seterrno ();
|
|
res = -1;
|
|
}
|
|
else
|
|
res = 0;
|
|
CloseHandle (h);
|
|
}
|
|
|
|
if (sd)
|
|
write_sd (win32.get_win32 (), sd, sd_size);
|
|
|
|
syscall_printf ("%d = utimes (%s, %x); (h%d)",
|
|
res, path, tvp, h);
|
|
return res;
|
|
}
|
|
|
|
/* utime: POSIX 5.6.6.1 */
|
|
extern "C"
|
|
int
|
|
utime (const char *path, struct utimbuf *buf)
|
|
{
|
|
struct timeval tmp[2];
|
|
|
|
if (buf == 0)
|
|
return utimes (path, 0);
|
|
|
|
debug_printf ("incoming utime act %x", buf->actime);
|
|
tmp[0] = time_t_to_timeval (buf->actime);
|
|
tmp[1] = time_t_to_timeval (buf->modtime);
|
|
|
|
return utimes (path, tmp);
|
|
}
|
|
|
|
/* ftime: standards? */
|
|
extern "C"
|
|
int
|
|
ftime (struct timeb *tp)
|
|
{
|
|
struct timeval tv;
|
|
struct timezone tz;
|
|
|
|
if (gettimeofday (&tv, &tz) < 0)
|
|
return -1;
|
|
|
|
tp->time = tv.tv_sec;
|
|
tp->millitm = tv.tv_usec / 1000;
|
|
tp->timezone = tz.tz_minuteswest;
|
|
tp->dstflag = tz.tz_dsttime;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* obsolete, changed to cygwin_tzset when localtime.c was added - dj */
|
|
extern "C"
|
|
void
|
|
cygwin_tzset ()
|
|
{
|
|
}
|