Elliott Hughes | cac3980 | 2018-04-27 16:19:43 -0700 | [diff] [blame] | 1 | /*************************************************************************** |
| 2 | * _ _ ____ _ |
| 3 | * Project ___| | | | _ \| | |
| 4 | * / __| | | | |_) | | |
| 5 | * | (__| |_| | _ <| |___ |
| 6 | * \___|\___/|_| \_\_____| |
| 7 | * |
| 8 | * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al. |
| 9 | * |
| 10 | * This software is licensed as described in the file COPYING, which |
| 11 | * you should have received as part of this distribution. The terms |
| 12 | * are also available at https://curl.haxx.se/docs/copyright.html. |
| 13 | * |
| 14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell |
| 15 | * copies of the Software, and permit persons to whom the Software is |
| 16 | * furnished to do so, under the terms of the COPYING file. |
| 17 | * |
| 18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| 19 | * KIND, either express or implied. |
| 20 | * |
| 21 | ***************************************************************************/ |
| 22 | #include "tool_filetime.h" |
| 23 | |
| 24 | #ifdef HAVE_UTIME_H |
| 25 | # include <utime.h> |
| 26 | #elif defined(HAVE_SYS_UTIME_H) |
| 27 | # include <sys/utime.h> |
| 28 | #endif |
| 29 | |
| 30 | curl_off_t getfiletime(const char *filename, FILE *error_stream) |
| 31 | { |
| 32 | curl_off_t result = -1; |
| 33 | |
| 34 | /* Windows stat() may attempt to adjust the unix GMT file time by a daylight |
| 35 | saving time offset and since it's GMT that is bad behavior. When we have |
| 36 | access to a 64-bit type we can bypass stat and get the times directly. */ |
| 37 | #if defined(WIN32) && (SIZEOF_CURL_OFF_T >= 8) |
| 38 | HANDLE hfile; |
| 39 | |
| 40 | hfile = CreateFileA(filename, FILE_READ_ATTRIBUTES, |
| 41 | (FILE_SHARE_READ | FILE_SHARE_WRITE | |
| 42 | FILE_SHARE_DELETE), |
| 43 | NULL, OPEN_EXISTING, 0, NULL); |
| 44 | if(hfile != INVALID_HANDLE_VALUE) { |
| 45 | FILETIME ft; |
| 46 | if(GetFileTime(hfile, NULL, NULL, &ft)) { |
| 47 | curl_off_t converted = (curl_off_t)ft.dwLowDateTime |
| 48 | | ((curl_off_t)ft.dwHighDateTime) << 32; |
| 49 | |
| 50 | if(converted < CURL_OFF_T_C(116444736000000000)) { |
| 51 | fprintf(error_stream, |
| 52 | "Failed to get filetime: underflow\n"); |
| 53 | } |
| 54 | else { |
| 55 | result = (converted - CURL_OFF_T_C(116444736000000000)) / 10000000; |
| 56 | } |
| 57 | } |
| 58 | else { |
| 59 | fprintf(error_stream, |
| 60 | "Failed to get filetime: " |
| 61 | "GetFileTime failed: GetLastError %u\n", |
| 62 | (unsigned int)GetLastError()); |
| 63 | } |
| 64 | CloseHandle(hfile); |
| 65 | } |
| 66 | else if(GetLastError() != ERROR_FILE_NOT_FOUND) { |
| 67 | fprintf(error_stream, |
| 68 | "Failed to get filetime: " |
| 69 | "CreateFile failed: GetLastError %u\n", |
| 70 | (unsigned int)GetLastError()); |
| 71 | } |
| 72 | #else |
| 73 | struct_stat statbuf; |
| 74 | if(-1 != stat(filename, &statbuf)) { |
| 75 | result = (curl_off_t)statbuf.st_mtime; |
| 76 | } |
| 77 | else if(errno != ENOENT) { |
| 78 | fprintf(error_stream, |
| 79 | "Failed to get filetime: %s\n", strerror(errno)); |
| 80 | } |
| 81 | #endif |
| 82 | return result; |
| 83 | } |
| 84 | |
| 85 | #if defined(HAVE_UTIME) || defined(HAVE_UTIMES) || \ |
| 86 | (defined(WIN32) && (SIZEOF_CURL_OFF_T >= 8)) |
| 87 | void setfiletime(curl_off_t filetime, const char *filename, |
| 88 | FILE *error_stream) |
| 89 | { |
| 90 | if(filetime >= 0) { |
| 91 | /* Windows utime() may attempt to adjust the unix GMT file time by a daylight |
| 92 | saving time offset and since it's GMT that is bad behavior. When we have |
| 93 | access to a 64-bit type we can bypass utime and set the times directly. */ |
| 94 | #if defined(WIN32) && (SIZEOF_CURL_OFF_T >= 8) |
| 95 | HANDLE hfile; |
| 96 | |
| 97 | /* 910670515199 is the maximum unix filetime that can be used as a |
| 98 | Windows FILETIME without overflow: 30827-12-31T23:59:59. */ |
| 99 | if(filetime > CURL_OFF_T_C(910670515199)) { |
| 100 | fprintf(error_stream, |
| 101 | "Failed to set filetime %" CURL_FORMAT_CURL_OFF_T |
| 102 | " on outfile: overflow\n", filetime); |
| 103 | return; |
| 104 | } |
| 105 | |
| 106 | hfile = CreateFileA(filename, FILE_WRITE_ATTRIBUTES, |
| 107 | (FILE_SHARE_READ | FILE_SHARE_WRITE | |
| 108 | FILE_SHARE_DELETE), |
| 109 | NULL, OPEN_EXISTING, 0, NULL); |
| 110 | if(hfile != INVALID_HANDLE_VALUE) { |
| 111 | curl_off_t converted = ((curl_off_t)filetime * 10000000) + |
| 112 | CURL_OFF_T_C(116444736000000000); |
| 113 | FILETIME ft; |
| 114 | ft.dwLowDateTime = (DWORD)(converted & 0xFFFFFFFF); |
| 115 | ft.dwHighDateTime = (DWORD)(converted >> 32); |
| 116 | if(!SetFileTime(hfile, NULL, &ft, &ft)) { |
| 117 | fprintf(error_stream, |
| 118 | "Failed to set filetime %" CURL_FORMAT_CURL_OFF_T |
| 119 | " on outfile: SetFileTime failed: GetLastError %u\n", |
| 120 | filetime, (unsigned int)GetLastError()); |
| 121 | } |
| 122 | CloseHandle(hfile); |
| 123 | } |
| 124 | else { |
| 125 | fprintf(error_stream, |
| 126 | "Failed to set filetime %" CURL_FORMAT_CURL_OFF_T |
| 127 | " on outfile: CreateFile failed: GetLastError %u\n", |
| 128 | filetime, (unsigned int)GetLastError()); |
| 129 | } |
| 130 | |
| 131 | #elif defined(HAVE_UTIMES) |
| 132 | struct timeval times[2]; |
| 133 | times[0].tv_sec = times[1].tv_sec = (time_t)filetime; |
| 134 | times[0].tv_usec = times[1].tv_usec = 0; |
| 135 | if(utimes(filename, times)) { |
| 136 | fprintf(error_stream, |
| 137 | "Failed to set filetime %" CURL_FORMAT_CURL_OFF_T |
| 138 | " on outfile: %s\n", filetime, strerror(errno)); |
| 139 | } |
| 140 | |
| 141 | #elif defined(HAVE_UTIME) |
| 142 | struct utimbuf times; |
| 143 | times.actime = (time_t)filetime; |
| 144 | times.modtime = (time_t)filetime; |
| 145 | if(utime(filename, ×)) { |
| 146 | fprintf(error_stream, |
| 147 | "Failed to set filetime %" CURL_FORMAT_CURL_OFF_T |
| 148 | " on outfile: %s\n", filetime, strerror(errno)); |
| 149 | } |
| 150 | #endif |
| 151 | } |
| 152 | } |
| 153 | #endif /* defined(HAVE_UTIME) || defined(HAVE_UTIMES) || \ |
| 154 | (defined(WIN32) && (SIZEOF_CURL_OFF_T >= 8)) */ |