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/*
* Simple 'touch' program for Windows
*
*/
#if !defined(_MSC_VER) && !defined(__MINGW32__) && !defined(_WIN32)
#error "Win32-only, the platform you're using is supposed to have 'touch' already."
#else
#include <stdio.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <errno.h>
#include <utime.h>
#include <windows.h>
/*
With Windows 7 in a virtual box VM on OS X, some very odd things happen
with dates and time stamps when SSHing into cygwin. e.g. here the
"Change" time is in the past:
$ date; touch foo; stat foo
Fri Dec 2 16:58:07 GMTST 2011
File: `foo'
Size: 0 Blocks: 0 IO Block: 65536 regular
empty file
Device: 540aba0bh/1409989131d Inode: 562949953592977 Links: 1
Access: (0644/-rw-r--r--) Uid: ( 1000/ ian) Gid: ( 513/ None)
Access: 2011-12-02 16:58:07.414457900 +0000
Modify: 2011-12-02 16:58:07.414457900 +0000
Change: 2011-12-02 16:58:03.495141800 +0000
Birth: 2011-12-02 16:57:57.731469900 +0000
And if we copy such a file, then the copy is older (as determined by the
"Modify" time) than the original:
$ date; touch foo; stat foo; cp foo bar; stat bar
Fri Dec 2 16:59:10 GMTST 2011
File: `foo'
Size: 0 Blocks: 0 IO Block: 65536 regular
empty file
Device: 540aba0bh/1409989131d Inode: 1407374883725128 Links: 1
Access: (0644/-rw-r--r--) Uid: ( 1000/ ian) Gid: ( 513/ None)
Access: 2011-12-02 16:59:10.118457900 +0000
Modify: 2011-12-02 16:59:10.118457900 +0000
Change: 2011-12-02 16:59:06.189477700 +0000
Birth: 2011-12-02 16:57:57.731469900 +0000
File: `bar'
Size: 0 Blocks: 0 IO Block: 65536 regular
empty file
Device: 540aba0bh/1409989131d Inode: 281474976882512 Links: 1
Access: (0644/-rw-r--r--) Uid: ( 1000/ ian) Gid: ( 513/ None)
Access: 2011-12-02 16:59:06.394555800 +0000
Modify: 2011-12-02 16:59:06.394555800 +0000
Change: 2011-12-02 16:59:06.395532400 +0000
Birth: 2011-12-02 16:58:40.921899600 +0000
This means that make thinks that things are out of date when it
shouldn't, so reinvokes itself repeatedly until the MAKE_RESTARTS
infinite-recursion test triggers.
The touchy program, like most other programs, creates files with both
Modify and Change in the past, which is still a little odd, but is
consistent, so doesn't break make.
We used to use _utime(argv[i],NULL)) to set the file modification times,
but after a BST -> GMT change this started giving files a modification
time an hour in the future:
$ date; utils/touchy/dist/build/tmp/touchy testfile; stat testfile
Tue, Oct 30, 2012 11:33:06 PM
File: `testfile'
Size: 0 Blocks: 0 IO Block: 65536 regular empty file
Device: 540aba0bh/1409989131d Inode: 9851624184986293 Links: 1
Access: (0755/-rwxr-xr-x) Uid: ( 1000/ ian) Gid: ( 513/ None)
Access: 2012-10-31 00:33:06.000000000 +0000
Modify: 2012-10-31 00:33:06.000000000 +0000
Change: 2012-10-30 23:33:06.769118900 +0000
Birth: 2012-10-30 23:33:06.769118900 +0000
so now we use the Win32 functions GetSystemTimeAsFileTime and SetFileTime.
*/
int
main(int argc, char** argv)
{
int i;
FILETIME ft;
BOOL b;
HANDLE hFile;
if (argc == 1) {
fprintf(stderr, "Usage: %s <files>\n", argv[0]);
return 1;
}
for (i = 1; i < argc; i++) {
hFile = CreateFile(argv[i], GENERIC_WRITE, 0, NULL, OPEN_ALWAYS,
FILE_ATTRIBUTE_NORMAL, NULL);
if (hFile == INVALID_HANDLE_VALUE) {
fprintf(stderr, "Unable to open %s\n", argv[i]);
exit(1);
}
GetSystemTimeAsFileTime(&ft);
b = SetFileTime(hFile, (LPFILETIME) NULL, (LPFILETIME) NULL, &ft);
if (b == 0) {
fprintf(stderr, "Unable to change mod. time for %s\n", argv[i]);
exit(1);
}
b = CloseHandle(hFile);
if (b == 0) {
fprintf(stderr, "Closing failed for %s\n", argv[i]);
exit(1);
}
}
return 0;
}
#endif
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