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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "tool_filetime.h"
#include "curlx.h"
#ifdef HAVE_UTIME_H
# include <utime.h>
#elif defined(HAVE_SYS_UTIME_H)
# include <sys/utime.h>
#endif
curl_off_t getfiletime(const char *filename, FILE *error_stream)
{
curl_off_t result = -1;
/* Windows stat() may attempt to adjust the unix GMT file time by a daylight
saving time offset and since it's GMT that is bad behavior. When we have
access to a 64-bit type we can bypass stat and get the times directly. */
#if defined(WIN32) && (SIZEOF_CURL_OFF_T >= 8)
HANDLE hfile;
TCHAR *tchar_filename = curlx_convert_UTF8_to_tchar((char *)filename);
hfile = CreateFile(tchar_filename, FILE_READ_ATTRIBUTES,
(FILE_SHARE_READ | FILE_SHARE_WRITE |
FILE_SHARE_DELETE),
NULL, OPEN_EXISTING, 0, NULL);
curlx_unicodefree(tchar_filename);
if(hfile != INVALID_HANDLE_VALUE) {
FILETIME ft;
if(GetFileTime(hfile, NULL, NULL, &ft)) {
curl_off_t converted = (curl_off_t)ft.dwLowDateTime
| ((curl_off_t)ft.dwHighDateTime) << 32;
if(converted < CURL_OFF_T_C(116444736000000000)) {
fprintf(error_stream,
"Failed to get filetime: underflow\n");
}
else {
result = (converted - CURL_OFF_T_C(116444736000000000)) / 10000000;
}
}
else {
fprintf(error_stream,
"Failed to get filetime: "
"GetFileTime failed: GetLastError %u\n",
(unsigned int)GetLastError());
}
CloseHandle(hfile);
}
else if(GetLastError() != ERROR_FILE_NOT_FOUND) {
fprintf(error_stream,
"Failed to get filetime: "
"CreateFile failed: GetLastError %u\n",
(unsigned int)GetLastError());
}
#else
struct_stat statbuf;
if(-1 != stat(filename, &statbuf)) {
result = (curl_off_t)statbuf.st_mtime;
}
else if(errno != ENOENT) {
fprintf(error_stream,
"Failed to get filetime: %s\n", strerror(errno));
}
#endif
return result;
}
#if defined(HAVE_UTIME) || defined(HAVE_UTIMES) || \
(defined(WIN32) && (SIZEOF_CURL_OFF_T >= 8))
void setfiletime(curl_off_t filetime, const char *filename,
FILE *error_stream)
{
if(filetime >= 0) {
/* Windows utime() may attempt to adjust the unix GMT file time by a daylight
saving time offset and since it's GMT that is bad behavior. When we have
access to a 64-bit type we can bypass utime and set the times directly. */
#if defined(WIN32) && (SIZEOF_CURL_OFF_T >= 8)
HANDLE hfile;
TCHAR *tchar_filename = curlx_convert_UTF8_to_tchar((char *)filename);
/* 910670515199 is the maximum unix filetime that can be used as a
Windows FILETIME without overflow: 30827-12-31T23:59:59. */
if(filetime > CURL_OFF_T_C(910670515199)) {
fprintf(error_stream,
"Failed to set filetime %" CURL_FORMAT_CURL_OFF_T
" on outfile: overflow\n", filetime);
curlx_unicodefree(tchar_filename);
return;
}
hfile = CreateFile(tchar_filename, FILE_WRITE_ATTRIBUTES,
(FILE_SHARE_READ | FILE_SHARE_WRITE |
FILE_SHARE_DELETE),
NULL, OPEN_EXISTING, 0, NULL);
curlx_unicodefree(tchar_filename);
if(hfile != INVALID_HANDLE_VALUE) {
curl_off_t converted = ((curl_off_t)filetime * 10000000) +
CURL_OFF_T_C(116444736000000000);
FILETIME ft;
ft.dwLowDateTime = (DWORD)(converted & 0xFFFFFFFF);
ft.dwHighDateTime = (DWORD)(converted >> 32);
if(!SetFileTime(hfile, NULL, &ft, &ft)) {
fprintf(error_stream,
"Failed to set filetime %" CURL_FORMAT_CURL_OFF_T
" on outfile: SetFileTime failed: GetLastError %u\n",
filetime, (unsigned int)GetLastError());
}
CloseHandle(hfile);
}
else {
fprintf(error_stream,
"Failed to set filetime %" CURL_FORMAT_CURL_OFF_T
" on outfile: CreateFile failed: GetLastError %u\n",
filetime, (unsigned int)GetLastError());
}
#elif defined(HAVE_UTIMES)
struct timeval times[2];
times[0].tv_sec = times[1].tv_sec = (time_t)filetime;
times[0].tv_usec = times[1].tv_usec = 0;
if(utimes(filename, times)) {
fprintf(error_stream,
"Failed to set filetime %" CURL_FORMAT_CURL_OFF_T
" on outfile: %s\n", filetime, strerror(errno));
}
#elif defined(HAVE_UTIME)
struct utimbuf times;
times.actime = (time_t)filetime;
times.modtime = (time_t)filetime;
if(utime(filename, ×)) {
fprintf(error_stream,
"Failed to set filetime %" CURL_FORMAT_CURL_OFF_T
" on outfile: %s\n", filetime, strerror(errno));
}
#endif
}
}
#endif /* defined(HAVE_UTIME) || defined(HAVE_UTIMES) || \
(defined(WIN32) && (SIZEOF_CURL_OFF_T >= 8)) */
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